@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

  :root, :root[data-theme="dark"] {
    color-scheme: dark;

    --bg: #0f0f0f;
    --surface: #1a1a1a;
    --surface2: #242424;
    --border: #2e2e2e;

    --text: #f0f0f0;
    --text-dim: #9a9a9a;
    --text-dimmer: #767676;

    --accent: #a78bfa;
    --accent-2: #c4a8ff;
    --accent-fg: #1a1a1a;
    --accent-bg: #1e1b2e;
    --accent-bg-subtle: #1e1b2e22;
    --accent-bg-soft: #1e1b2e44;
    --accent-bg-med: #1e1b2e66;
    --accent-border: #3730a3;
    --accent-tint: rgba(167,139,250,0.10);
    --accent-tint-strong: rgba(167,139,250,0.2);
    --accent-tint-border: rgba(167,139,250,0.4);

    --green: #4ade80;
    --green-dim: #166534;
    --green-bg: #14532d;
    --green-bg-subtle: #14532d22;
    --green-bg-soft: #14532d33;
    --on-green: #000;

    --red: #f87171;
    --red-dim: #7f1d1d;
    --red-bg-soft: #7f1d1d33;
    --red-tint: rgba(239,68,68,0.08);
    --red-tint-strong: rgba(239,68,68,0.1);
    --red-tint-border: rgba(239,68,68,0.35);
    --on-red: #000;

    --yellow: #fbbf24;
    --yellow-bg: #2e1f0a;
    --yellow-bg-soft: #fbbf2422;
    --yellow-border: #b45309;
    --yellow-tint: rgba(251,191,36,0.08);
    --yellow-tint-btn: rgba(251,191,36,0.18);
    --yellow-tint-btn-hover: rgba(251,191,36,0.32);
    --yellow-tint-border: rgba(251,191,36,0.45);
    --on-yellow: #000;

    --badge-single: #a5b4fc; --badge-single-bg: rgba(99,102,241,0.12); --badge-single-bd: rgba(99,102,241,0.4);
    --badge-multi:  #c4b5fd; --badge-multi-bg:  rgba(139,92,246,0.12); --badge-multi-bd:  rgba(139,92,246,0.4);
    --badge-tf:     #7dd3fc; --badge-tf-bg:     rgba(56,189,248,0.12); --badge-tf-bd:     rgba(56,189,248,0.4);
    --badge-gap:    #86efac; --badge-gap-bg:    rgba(34,197,94,0.12);  --badge-gap-bd:    rgba(34,197,94,0.4);

    --overlay: #000000cc;
    --shadow: rgba(0,0,0,0.4);
    --shadow-strong: rgba(0,0,0,0.45);
    --inset-bg: rgba(0,0,0,0.2);
    --hairline: rgba(255,255,255,0.08);
    --faint-bg: rgba(255,255,255,0.04);
    --lightbox-bg: rgba(0,0,0,0.92);
    --lightbox-btn: rgba(255,255,255,0.1);
    --lightbox-btn-bd: rgba(255,255,255,0.2);
    --lightbox-btn-hover: rgba(255,255,255,0.2);
    --icon-muted: #aeb4c0;

    --font-ui: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-display: 'Syne', sans-serif;
  }

  :root[data-theme="light"] {
    color-scheme: light;

    --bg: #fafafa;
    --surface: #ffffff;
    --surface2: #f2f2f5;
    --border: #e2e2e8;

    --text: #17171a;
    --text-dim: #5c5c66;
    --text-dimmer: #74747e;

    --accent: #6d28d9;
    --accent-2: #8b5cf6;
    --accent-fg: #ffffff;
    --accent-bg: #f1ecfe;
    --accent-bg-subtle: #6d28d90f;
    --accent-bg-soft: #6d28d91a;
    --accent-bg-med: #6d28d926;
    --accent-border: #c4b5fd;
    --accent-tint: rgba(109,40,217,0.07);
    --accent-tint-strong: rgba(109,40,217,0.14);
    --accent-tint-border: rgba(109,40,217,0.35);

    --green: #14532d;
    --green-dim: #86d5a3;
    --green-bg: #dcf5e6;
    --green-bg-subtle: #15803d0f;
    --green-bg-soft: #15803d1f;
    --on-green: #fff;

    --red: #b91c1c;
    --red-dim: #f0a9a9;
    --red-bg-soft: #b91c1c1a;
    --red-tint: rgba(185,28,28,0.06);
    --red-tint-strong: rgba(185,28,28,0.1);
    --red-tint-border: rgba(185,28,28,0.3);
    --on-red: #fff;

    --yellow: #a16207;
    --yellow-bg: #fdf3d9;
    --yellow-bg-soft: #a162071f;
    --yellow-border: #d9a441;
    --yellow-tint: rgba(161,98,7,0.08);
    --yellow-tint-btn: rgba(161,98,7,0.14);
    --yellow-tint-btn-hover: rgba(161,98,7,0.24);
    --yellow-tint-border: rgba(161,98,7,0.4);
    --on-yellow: #fff;

    --badge-single: #4338ca; --badge-single-bg: rgba(99,102,241,0.10); --badge-single-bd: rgba(99,102,241,0.35);
    --badge-multi:  #6d28d9; --badge-multi-bg:  rgba(139,92,246,0.10); --badge-multi-bd:  rgba(139,92,246,0.35);
    --badge-tf:     #0369a1; --badge-tf-bg:     rgba(56,189,248,0.12); --badge-tf-bd:     rgba(56,189,248,0.45);
    --badge-gap:    #15803d; --badge-gap-bg:    rgba(34,197,94,0.10);  --badge-gap-bd:    rgba(34,197,94,0.35);

    --overlay: #1a1a1fa6;
    --shadow: rgba(0,0,0,0.10);
    --shadow-strong: rgba(0,0,0,0.14);
    --inset-bg: rgba(0,0,0,0.04);
    --hairline: rgba(0,0,0,0.09);
    --faint-bg: rgba(0,0,0,0.03);
    --lightbox-bg: rgba(20,20,24,0.90);
    --lightbox-btn: rgba(255,255,255,0.15);
    --lightbox-btn-bd: rgba(255,255,255,0.3);
    --lightbox-btn-hover: rgba(255,255,255,0.28);
    --icon-muted: #6b7280;
    --font-display: 'Syne', sans-serif;
  }

  :root[data-theme="blossom"] {
    color-scheme: light;
    --bg: #fdf7f8; --surface: #fffafb; --surface2: #fbeef1; --border: #f4dde4;
    --text: #2b1b21; --text-dim: #6e545c; --text-dimmer: #8a6b75;
    --accent: #be185d; --accent-2: #db2777; --accent-fg: #ffffff;
    --accent-bg: #fdeef4; --accent-bg-subtle: #be185d0f; --accent-bg-soft: #be185d1a; --accent-bg-med: #be185d26;
    --accent-border: #f9a8d4;
    --accent-tint: rgba(190,24,93,0.07); --accent-tint-strong: rgba(190,24,93,0.14); --accent-tint-border: rgba(190,24,93,0.35);
    --green: #115e59; --green-dim: #8fd3cc; --green-bg: #d8f1ee;   
    --green-bg-subtle: #0f766e0f; --green-bg-soft: #0f766e1f; --on-green: #fff;
    --red: #b91c1c; --red-dim: #f0a9a9; --red-bg-soft: #b91c1c1a;
    --red-tint: rgba(185,28,28,0.06); --red-tint-strong: rgba(185,28,28,0.1);
    --red-tint-border: rgba(185,28,28,0.3); --on-red: #fff;
    --yellow: #a16207; --yellow-bg: #fdf3d9; --yellow-bg-soft: #a162071f; --yellow-border: #d9a441;
    --yellow-tint: rgba(161,98,7,0.08); --yellow-tint-btn: rgba(161,98,7,0.14);
    --yellow-tint-btn-hover: rgba(161,98,7,0.24); --yellow-tint-border: rgba(161,98,7,0.4); --on-yellow: #fff;
    --badge-single: #a21caf; --badge-single-bg: rgba(162,28,175,0.10); --badge-single-bd: rgba(162,28,175,0.35);
    --badge-multi:  #be185d; --badge-multi-bg:  rgba(190,24,93,0.10);  --badge-multi-bd:  rgba(190,24,93,0.35);
    --badge-tf:     #0369a1; --badge-tf-bg:     rgba(3,105,161,0.10);  --badge-tf-bd:     rgba(3,105,161,0.35);
    --badge-gap:    #0f766e; --badge-gap-bg:    rgba(15,118,110,0.10); --badge-gap-bd:    rgba(15,118,110,0.35);
    --overlay: #2b1b21a6; --shadow: rgba(88,28,55,0.10); --shadow-strong: rgba(88,28,55,0.16);
    --inset-bg: rgba(88,28,55,0.04); --hairline: rgba(88,28,55,0.10); --faint-bg: rgba(88,28,55,0.03);
    --lightbox-bg: rgba(43,27,33,0.92); --lightbox-btn: rgba(255,255,255,0.15);
    --lightbox-btn-bd: rgba(255,255,255,0.3); --lightbox-btn-hover: rgba(255,255,255,0.28);
    --icon-muted: #8a6b75;
    --font-display: 'Quicksand', system-ui, sans-serif;
  }

  :root[data-theme="sakura"] {
    color-scheme: light;
    --bg: #fbdfec; --surface: #fff5fa; --surface2: #fce8f1; --border: #f6c3da;
    --text: #3b1029; --text-dim: #7e4560; --text-dimmer: #94597a;
    --accent: #b4176b; --accent-2: #db2777; --accent-fg: #ffffff;
    --accent-bg: #fce4f0; --accent-bg-subtle: #b4176b0f; --accent-bg-soft: #b4176b1a; --accent-bg-med: #b4176b26;
    --accent-border: #f0a6c9;
    --accent-tint: rgba(180,23,107,0.07); --accent-tint-strong: rgba(180,23,107,0.14); --accent-tint-border: rgba(180,23,107,0.35);
    --green: #115e59; --green-dim: #8fd3cc; --green-bg: #d5f0ec;   
    --green-bg-subtle: #0f766e0f; --green-bg-soft: #0f766e1f; --on-green: #fff;
    --red: #b0142e; --red-dim: #eda3ad; --red-bg-soft: #b0142e1a;
    --red-tint: rgba(176,20,46,0.06); --red-tint-strong: rgba(176,20,46,0.1);
    --red-tint-border: rgba(176,20,46,0.3); --on-red: #fff;
    --yellow: #96590a; --yellow-bg: #fbeeda; --yellow-bg-soft: #96590a1f; --yellow-border: #d3a256;
    --yellow-tint: rgba(150,89,10,0.08); --yellow-tint-btn: rgba(150,89,10,0.14);
    --yellow-tint-btn-hover: rgba(150,89,10,0.24); --yellow-tint-border: rgba(150,89,10,0.4); --on-yellow: #fff;
    --badge-single: #9333ea; --badge-single-bg: rgba(147,51,234,0.10); --badge-single-bd: rgba(147,51,234,0.35);
    --badge-multi:  #b4176b; --badge-multi-bg:  rgba(180,23,107,0.10); --badge-multi-bd:  rgba(180,23,107,0.35);
    --badge-tf:     #0369a1; --badge-tf-bg:     rgba(3,105,161,0.10);  --badge-tf-bd:     rgba(3,105,161,0.35);
    --badge-gap:    #0f766e; --badge-gap-bg:    rgba(15,118,110,0.10); --badge-gap-bd:    rgba(15,118,110,0.35);
    --overlay: #3b1029a6; --shadow: rgba(96,16,60,0.12); --shadow-strong: rgba(96,16,60,0.18);
    --inset-bg: rgba(96,16,60,0.05); --hairline: rgba(96,16,60,0.10); --faint-bg: rgba(96,16,60,0.04);
    --lightbox-bg: rgba(59,16,41,0.92); --lightbox-btn: rgba(255,255,255,0.15);
    --lightbox-btn-bd: rgba(255,255,255,0.3); --lightbox-btn-hover: rgba(255,255,255,0.28);
    --icon-muted: #94597a;
    --font-display: 'Quicksand', system-ui, sans-serif;
  }

  :root[data-theme="matcha"] {
    color-scheme: light;
    --bg: #f4f7ec; --surface: #fbfcf7; --surface2: #eef3e2; --border: #e0e5d4;
    --text: #1d2415; --text-dim: #5c6650; --text-dimmer: #6b7560;
    --accent: #3f6212; --accent-2: #4d7c0f; --accent-fg: #ffffff;
    --accent-bg: #e9f0da; --accent-bg-subtle: #3f62120f; --accent-bg-soft: #3f62121a; --accent-bg-med: #3f621226;
    --accent-border: #a3c46b;
    --accent-tint: rgba(63,98,18,0.07); --accent-tint-strong: rgba(63,98,18,0.14); --accent-tint-border: rgba(63,98,18,0.35);
    --green: #14532d; --green-dim: #9fcfae; --green-bg: #ddf0e2;   
    --green-bg-subtle: #15803d0f; --green-bg-soft: #15803d1a; --on-green: #fff;
    --red: #a3341c; --red-dim: #e8b0a2; --red-bg-soft: #a3341c1a;
    --red-tint: rgba(163,52,28,0.06); --red-tint-strong: rgba(163,52,28,0.1);
    --red-tint-border: rgba(163,52,28,0.3); --on-red: #fff;
    --yellow: #8a6410; --yellow-bg: #f6eed6; --yellow-bg-soft: #8a64101f; --yellow-border: #c6a352;
    --yellow-tint: rgba(138,100,16,0.08); --yellow-tint-btn: rgba(138,100,16,0.14);
    --yellow-tint-btn-hover: rgba(138,100,16,0.24); --yellow-tint-border: rgba(138,100,16,0.4); --on-yellow: #fff;
    --badge-single: #3f6212; --badge-single-bg: rgba(63,98,18,0.10);   --badge-single-bd: rgba(63,98,18,0.35);
    --badge-multi:  #5b21b6; --badge-multi-bg:  rgba(91,33,182,0.10);  --badge-multi-bd:  rgba(91,33,182,0.35);
    --badge-tf:     #0f5c6e; --badge-tf-bg:     rgba(15,92,110,0.10);  --badge-tf-bd:     rgba(15,92,110,0.35);
    --badge-gap:    #15803d; --badge-gap-bg:    rgba(21,128,61,0.10);  --badge-gap-bd:    rgba(21,128,61,0.35);
    --overlay: #1d2415a6; --shadow: rgba(29,36,21,0.10); --shadow-strong: rgba(29,36,21,0.15);
    --inset-bg: rgba(29,36,21,0.04); --hairline: rgba(29,36,21,0.09); --faint-bg: rgba(29,36,21,0.03);
    --lightbox-bg: rgba(29,36,21,0.92); --lightbox-btn: rgba(255,255,255,0.15);
    --lightbox-btn-bd: rgba(255,255,255,0.3); --lightbox-btn-hover: rgba(255,255,255,0.28);
    --icon-muted: #6b7560;
    --font-display: 'Fraunces', Georgia, serif;
  }

  :root[data-theme="dusk"] {
    color-scheme: dark;
    --bg: #10131f; --surface: #171a2e; --surface2: #232845; --border: #2a2f4d;
    --text: #eceaf6; --text-dim: #a3a2c4; --text-dimmer: #8584ab;
    --accent: #fb8f6d; --accent-2: #fdba8f; --accent-fg: #2b1206;
    --accent-bg: #232845; --accent-bg-subtle: #fb8f6d14; --accent-bg-soft: #fb8f6d24; --accent-bg-med: #fb8f6d33;
    --accent-border: #6b4a63;
    --accent-tint: rgba(251,143,109,0.10); --accent-tint-strong: rgba(251,143,109,0.2); --accent-tint-border: rgba(251,143,109,0.4);
    --green: #5ee0a8; --green-dim: #1d7a5c; --green-bg: #0e4d3a;
    --green-bg-subtle: #0e4d3a44; --green-bg-soft: #0e4d3a88; --on-green: #06231a;
    --red: #fb7185; --red-dim: #7f1d3a; --red-bg-soft: #7f1d3a66;
    --red-tint: rgba(251,113,133,0.08); --red-tint-strong: rgba(251,113,133,0.12);
    --red-tint-border: rgba(251,113,133,0.35); --on-red: #2b0610;
    --yellow: #fcd34d; --yellow-bg: #3a2c0a; --yellow-bg-soft: #fcd34d22; --yellow-border: #a16207;
    --yellow-tint: rgba(252,211,77,0.08); --yellow-tint-btn: rgba(252,211,77,0.18);
    --yellow-tint-btn-hover: rgba(252,211,77,0.32); --yellow-tint-border: rgba(252,211,77,0.45); --on-yellow: #2b1f04;
    --badge-single: #a5b4fc; --badge-single-bg: rgba(129,140,248,0.14); --badge-single-bd: rgba(129,140,248,0.4);
    --badge-multi:  #f0abfc; --badge-multi-bg:  rgba(240,171,252,0.12); --badge-multi-bd:  rgba(240,171,252,0.4);
    --badge-tf:     #7dd3fc; --badge-tf-bg:     rgba(125,211,252,0.12); --badge-tf-bd:     rgba(125,211,252,0.4);
    --badge-gap:    #5ee0a8; --badge-gap-bg:    rgba(94,224,168,0.12);  --badge-gap-bd:    rgba(94,224,168,0.4);
    --overlay: #070912cc; --shadow: rgba(0,0,0,0.45); --shadow-strong: rgba(0,0,0,0.55);
    --inset-bg: rgba(0,0,0,0.25); --hairline: rgba(255,255,255,0.09); --faint-bg: rgba(255,255,255,0.05);
    --lightbox-bg: rgba(7,9,18,0.93); --lightbox-btn: rgba(255,255,255,0.12);
    --lightbox-btn-bd: rgba(255,255,255,0.22); --lightbox-btn-hover: rgba(255,255,255,0.22);
    --icon-muted: #8584ab;
    --font-display: 'Syne', sans-serif;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { overflow-x: hidden; }
  body { background: var(--bg); color: var(--text); font-family: var(--font-ui); min-height: 100vh; overflow-x: hidden; overflow-wrap: break-word; }
  
  .qtext, .qscenario, .opt, .fbbody, .srow-name, .home-sub, .hc-title,
  .modal p, .modal h2, .upload-desc, .bdlbl { overflow-wrap: anywhere; word-break: break-word; }

  header { padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border); }
  
  @media(max-width:580px) {
    header { position: sticky; top: 0; z-index: 50; background: var(--bg); transform: translateY(0); transition: transform 0.25s ease; }
    header.hdr-hidden { transform: translateY(-100%); }
  }
  .logo { font-family: var(--font-display); font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; }
  .logo span { color: var(--accent); }
  
  .user-avatar { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: var(--surface2); border: 1px solid var(--border); color: var(--text); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; font-weight: 600; cursor: pointer; user-select: none; transition: border-color 0.15s, background 0.15s; }
  .user-avatar:hover { border-color: var(--accent); }
  .user-avatar.open { border-color: var(--accent); background: var(--accent-bg-soft); }
  .user-menu-wrap { position: relative; display: inline-block; }
  .user-menu { position: absolute; top: calc(100% + 6px); right: 0; min-width: 240px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 6px; box-shadow: 0 8px 24px var(--shadow); z-index: 60; display: none; }
  .user-menu.open { display: block; animation: fadeSlide 0.15s ease; }
  .user-menu-email { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); padding: 8px 10px; word-break: break-all; line-height: 1.4; }
  .user-menu-divider { height: 1px; background: var(--border); margin: 4px 0; }
  .user-menu-item { display: block; width: 100%; text-align: left; background: none; border: none; color: var(--text); font-family: var(--font-ui); font-size: 0.84rem; padding: 9px 10px; border-radius: 6px; cursor: pointer; transition: background 0.12s, color 0.12s; }
  .user-menu-item:hover { background: var(--surface2); color: var(--red); }

  .ic { width: 1em; height: 1em; display: inline-block; vertical-align: -0.125em; flex-shrink: 0; }
  .omark .ic       { width: 12px; height: 12px; vertical-align: 0; }
  .qstar .ic,
  .share-btn .ic   { width: 13px; height: 13px; vertical-align: 0; }
  .src-badge .ic   { width: 10px; height: 10px; margin-right: 1px; }
  .pub-badge .ic   { width: 9px;  height: 9px; }
  .fdrop-name .ic  { width: 12px; height: 12px; }
  .fdrop-clear .ic,
  .clear-btn .ic,
  .update-banner-x .ic { width: 11px; height: 11px; vertical-align: 0; }
  .setup-check-box .ic { width: 11px; height: 11px; vertical-align: 0; }
  .fbhd .ic        { width: 15px; height: 15px; }
  .cal-warn .ic    { width: 13px; height: 13px; }
  .exam-mode-btn-name .ic { width: 12px; height: 12px; vertical-align: 0; }
  #syncErrBanner .ic { width: 15px; height: 15px; }
  #genErr .ic      { width: 14px; height: 14px; }

  .view { display: none; }
  .view.active { display: block; }

  #home, #courses { max-width: 740px; margin: 0 auto; padding: 48px 28px 0; }
  
  .home-sub { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 22px; line-height: 1.55; }

  body.on-home #courseSwitch { display: none !important; }
  .hc-label { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-dim); margin-bottom: 3px; }
  
  .hc-title { display: block; max-width: 100%; background: none; border: none; padding: 0; cursor: pointer; color: var(--text); font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; line-height: 1.15; letter-spacing: -0.02em; text-align: left; }
  .hc-title:hover { color: var(--accent); }
  .hc-caret { color: var(--text-dim); font-size: 0.8rem; font-family: var(--font-ui); margin-left: 7px; white-space: nowrap; }
  .hc-meta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); margin: 5px 0 22px; }
  .hc-other { background: none; border: none; padding: 0; color: var(--accent); font-family: inherit; font-size: inherit; text-decoration: underline; cursor: pointer; }

  #homeCourse { position: relative; }
  .hc-menu { display: none; position: absolute; z-index: 80; top: 100%; left: 0; min-width: min(320px, 100%); max-width: 100%; margin-top: 4px; background: var(--surface); border: 1px solid var(--accent); border-radius: 12px; box-shadow: 0 10px 28px var(--shadow-strong); overflow: hidden; }
  .hc-menu.open { display: block; }
  .hc-item { display: flex; align-items: flex-start; gap: 9px; width: 100%; text-align: left; background: none; border: none; border-bottom: 1px solid var(--hairline); padding: 10px 12px; cursor: pointer; color: var(--text); font-family: inherit; }
  .hc-item:last-child { border-bottom: none; }
  .hc-item:hover { background: var(--surface2); }
  .hc-item.on { background: var(--accent-bg-subtle); }
  .hc-item-mark { flex: 0 0 16px; display: flex; justify-content: center; padding-top: 2px; color: var(--accent); font-size: 0.8rem; }
  .hc-item-mark .ic { width: 13px; height: 13px; }
  .hc-item-body { flex: 1; min-width: 0; }
  .hc-item-name { display: block; font-size: 0.86rem; font-weight: 600; line-height: 1.3; overflow-wrap: anywhere; }
  .hc-item-sub { display: block; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.68rem; color: var(--text-dim); margin-top: 2px; }
  .hc-add .hc-item-name { color: var(--text-dim); }
  .hc-add:hover .hc-item-name { color: var(--text); }

  .hero-card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px; margin-bottom: 22px; }
  .hero-card.hero-muted { border-style: dashed; }
  .hero-btn { width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px; padding: 15px 18px; border: none; border-radius: 10px; background: var(--accent); color: var(--accent-fg); font-family: inherit; font-size: 1rem; font-weight: 700; cursor: pointer; transition: filter .15s, transform .15s; }
  .hero-btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
  .hero-btn .ic { width: 1.05em; height: 1.05em; }
  .hero-sub { color: var(--text-dim); font-size: 0.82rem; line-height: 1.5; margin-top: 10px; text-align: center; }
  .hero-line { font-size: 0.95rem; font-weight: 600; text-align: center; }
  .hero-actions { display: flex; gap: 14px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
  .hero-link { background: none; border: none; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.76rem; text-decoration: underline; cursor: pointer; padding: 3px; }
  .hero-link:hover { color: var(--text); }

  .session-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 24px; }
  .srow { display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px; cursor: pointer; color: var(--text); font-family: inherit; transition: border-color .15s, background .15s; }
  .srow:hover { border-color: var(--accent); background: var(--surface2); }
  .srow.locked { border-style: dashed; }
  .srow-num { flex: 0 0 26px; height: 26px; border-radius: 7px; background: var(--surface2); color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.74rem; display: flex; align-items: center; justify-content: center; }
  .srow.has-q .srow-num { background: var(--accent-bg-med); color: var(--accent); }
  .srow-body { flex: 1; min-width: 0; }
  .srow-name { font-size: 0.88rem; font-weight: 600; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .srow-meta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.68rem; color: var(--text-dim); margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .srow-badge { margin-left: 5px; font-size: 0.7rem; vertical-align: middle; }
  .srow-badge .ic { width: 0.85em; height: 0.85em; color: var(--green); }
  .srow-actions { display: flex; gap: 4px; flex: 0 0 auto; }
  .srow-go { flex: 0 0 auto; color: var(--text-dimmer); font-size: 0.9rem; display: flex; align-items: center; }
  .srow-go .ic { width: 0.9em; height: 0.9em; }
  
  .srow .clear-btn, .srow .share-btn { opacity: 1; }
  
  @media(max-width:580px) {
    #home, #quiz, #stats { padding-left: 5px !important; padding-right: 5px !important; }
    
    #qInner { padding-left: 6px !important; padding-right: 6px !important; }
    #home, #courses { padding-top: 28px; }
    .hc-title { font-size: 1.32rem; }
    .home-sub { font-size: 0.88rem; margin-bottom: 18px; }

    #home > div, #stats > div, #courses > div {
      padding-left: 10px !important;
      padding-right: 10px !important;
    }

    .session-name {
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    header .theme-nudge { left: auto; right: 0; width: min(232px, calc(100vw - 24px)); min-width: 0; }

    header > div:last-child, .course-switch { min-width: 0; }
    .upload-panel { padding: 14px; border-radius: 12px; }
    
    .qcard { padding: 16px 10px; border-radius: 12px; }
    .srow { padding: 10px 11px; }
    header { padding: 14px 14px; }
    .modal { padding: 22px 16px; }
    .opt { padding: 10px 11px; gap: 8px; font-size: 0.84rem; }
    .qscenario { padding: 10px 12px; }
    .qtop { margin-bottom: 18px; }
    
    .pills { max-width: 60%; gap: 2px; }
    .pill { width: 11px; height: 4px; }
    
    .toast { left: 12px !important; right: 12px !important; top: 12px; max-width: calc(100vw - 24px) !important; }
    
    .fbbody .exp-list { padding-left: 16px; }
    
    .kbd-hint { display: none !important; }
    
    .src-badge { font-size: 0.54rem; padding: 2px 6px; }
    .type-badge { font-size: 0.56rem; padding: 2px 6px; }
    
    header { padding: 10px 14px !important; }
    
    .user-menu { right: 0; left: auto; min-width: 200px; max-width: calc(100vw - 24px); }
    
    .qactions { flex-wrap: wrap; gap: 7px; margin-top: 14px; }
    .qactions .btn { min-height: 46px; justify-content: center; }
    
    .qactions .btn-ghost { flex: 1 1 28%; font-size: 0.8rem; padding: 10px 6px; gap: 4px; }
    
    .qactions .btn-primary { flex: 1 1 100%; min-height: 54px; font-size: 0.95rem; order: 2; }
    
    .gap-input, .signin-input { font-size: 16px; }
    
    body.quiz-mode .bottom-nav { display: none; }
    body.quiz-mode .spacer { height: 0; }
    
    body.quiz-mode header { position: static !important; transform: none !important; }
    body.quiz-mode #quiz { padding-top: 10px; }
  }

  .clear-btn { background: var(--surface2); border: 1px solid var(--border); border-radius: 4px; color: var(--text-dimmer); font-size: 0.6rem; padding: 2px 5px; cursor: pointer; transition: opacity 0.2s; line-height: 1; }
  .clear-btn:hover { color: var(--red); border-color: var(--red-dim); }

  .share-btn { background: var(--surface2); border: 1px solid var(--border); border-radius: 4px; color: var(--text-dimmer); font-size: 0.6rem; padding: 2px 5px; cursor: pointer; transition: opacity 0.2s, color 0.2s, border-color 0.2s; line-height: 1; }
  .share-btn:hover { color: var(--accent); border-color: var(--accent); }
  .share-btn.published { color: var(--green); border-color: var(--green-dim); opacity: 1; }
  .share-btn.published:hover { color: var(--yellow); border-color: var(--yellow); }

  .lib-badge { display: inline-block; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.55rem; padding: 1px 5px; border-radius: 3px; background: var(--green-bg); color: var(--green); margin-left: 5px; vertical-align: middle; }
  .pub-badge { display: inline-block; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.55rem; padding: 1px 5px; border-radius: 3px; background: var(--accent-bg); color: var(--accent); margin-left: 5px; vertical-align: middle; }

  .btn { display: inline-flex; align-items: center; gap: 7px; padding: 11px 20px; border-radius: 8px; border: none; font-family: var(--font-ui); font-size: 0.88rem; font-weight: 500; cursor: pointer; transition: opacity 0.15s, transform 0.1s; }
  .btn:hover { opacity: 0.85; transform: translateY(-1px); }
  .btn:active { transform: translateY(0); }
  .btn-primary { background: var(--accent); color: var(--accent-fg); }
  .btn-ghost { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
  .btn-sm { padding: 7px 14px; font-size: 0.8rem; }
  .btn:disabled { background: var(--surface2); color: var(--text-dim); border: 1px solid var(--border); opacity: 1; cursor: not-allowed; transform: none; }

  .upload-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 22px; margin-bottom: 20px; }
  .upload-panel h3 { font-family: var(--font-display); font-weight: 700; margin-bottom: 6px; font-size: 1rem; }
  
  .upload-panel .panel-toggle { display: flex; align-items: center; justify-content: space-between; gap: 10px; cursor: pointer; user-select: none; margin-bottom: 0; }
  
  .panel-chevron { display: inline-flex; align-items: center; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.68rem; font-weight: 500; letter-spacing: 0.04em; color: var(--accent); background: var(--accent-tint); border: 1px solid var(--accent-tint-border); border-radius: 999px; padding: 4px 12px; flex-shrink: 0; transition: background 0.15s, border-color 0.15s; }
  .panel-chevron::after { content: 'Show ▾'; }
  .upload-panel:not(.collapsed) .panel-chevron::after { content: 'Hide ▴'; }
  .upload-panel .panel-toggle:hover .panel-chevron { background: var(--accent-tint-strong); border-color: var(--accent); }
  .upload-panel.collapsed { padding-bottom: 18px; }
  .upload-panel.collapsed .panel-body { display: none; }
  .upload-panel .panel-body { margin-top: 14px; }
  .upload-desc { color: var(--text-dim); font-size: 0.83rem; margin-bottom: 18px; line-height: 1.5; }
  .ulabel { font-size: 0.7rem; color: var(--text-dim); margin-bottom: 5px; font-family: var(--font-ui); font-variant-numeric: tabular-nums; text-transform: uppercase; letter-spacing: 0.05em; }
  .urow { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-bottom: 14px; align-items: stretch; }
  .urow > div { display: flex; flex-direction: column; }       
  .urow > div > .ulabel { min-height: 1.2rem; }                
  .urow .fdrop { flex: 1; }                                    
  @media(max-width:480px){ .urow { grid-template-columns: 1fr; } }

  .fdrop { border: 1.5px dashed var(--border); border-radius: 10px; padding: 16px 12px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; position: relative; min-height: 90px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
  .fdrop:hover { border-color: var(--accent); background: var(--accent-bg-subtle); }
  .fdrop.has-file { border-color: var(--green); background: var(--green-bg-subtle); }
  .fdrop input[type=file] { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
  .fdrop-icon { font-size: 1.3rem; }
  .fdrop-text { font-size: 0.76rem; color: var(--text-dim); }
  .fdrop-name { font-size: 0.76rem; color: var(--green); font-family: var(--font-ui); font-variant-numeric: tabular-nums; }
  .fdrop-required { font-size: 0.65rem; color: var(--accent); font-family: var(--font-ui); font-variant-numeric: tabular-nums; margin-top: 2px; }
  .fdrop-optional { font-size: 0.65rem; color: var(--text-dimmer); font-family: var(--font-ui); font-variant-numeric: tabular-nums; margin-top: 2px; }
  
  .fdrop.has-file .fdrop-required,
  .fdrop.has-file .fdrop-optional { display: none; }
  
  .fdrop-clear { position: absolute; top: 6px; right: 6px; width: 22px; height: 22px; border-radius: 4px; background: var(--faint-bg); border: 1px solid var(--border); color: var(--text-dimmer); font-size: 0.7rem; cursor: pointer; display: none; align-items: center; justify-content: center; padding: 0; line-height: 1; z-index: 2; transition: color 0.15s, border-color 0.15s, background 0.15s; }
  .fdrop.has-file .fdrop-clear { display: flex; }
  .fdrop-clear:hover { color: var(--red); border-color: var(--red-dim); background: var(--red-tint-strong); }

  .sess-row { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 13px; }
  .sbtn { padding: 5px 11px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface2); color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.76rem; cursor: pointer; transition: all 0.15s; }
  .sbtn:hover { border-color: var(--accent); color: var(--text); }
  .sbtn.sel { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }

  .genprog { display: none; margin-top: 18px; }
  .genprog.on { display: block; }
  .ptrack { height: 8px; background: var(--surface2); border-radius: 4px; overflow: hidden; margin-bottom: 10px; position: relative; }
  .pfill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 4px; width: 0%; transition: width 0.5s ease; }
  .pfill.shimmer { background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent) 100%); background-size: 200% 100%; animation: shimmer 1.5s linear infinite; }
  @keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
  .pinfo { display: flex; justify-content: space-between; align-items: center; }
  .pstatus { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.78rem; color: var(--text); }
  .ppct { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.78rem; color: var(--accent); font-weight: 600; }
  
  .ptime { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; color: var(--text-dim); margin-top: 4px; }
  .pnote { font-size: 0.72rem; color: var(--text-dim); margin-top: 6px; line-height: 1.45; }

  #quiz { max-width: 680px; margin: 0 auto; padding: 36px 28px 0; }
  .qtop { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; }
  .qmeta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; color: var(--text-dim); }
  .pills { display: flex; gap: 3px; flex-wrap: wrap; max-width: 220px; justify-content: flex-end; }
  .pill { width: 16px; height: 5px; border-radius: 3px; background: var(--border); transition: background 0.3s; }
  .pill.c { background: var(--green); }
  .pill.w { background: var(--red); }
  .pill.cur { background: var(--accent); }
  .pill.reviewing { box-shadow: 0 0 0 2px var(--accent); }

  .qcard { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 26px; margin-bottom: 14px; animation: fadeSlide 0.28s ease; position: relative; }
  @keyframes fadeSlide { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }
  .src-badge { display: inline-block; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.1em; padding: 2px 7px; border-radius: 4px; margin-right: 5px; }
  .official { background: var(--accent-bg); color: var(--accent); border: 1px solid var(--accent-border); }
  .ai-gen { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-dim); }
  .exam-gen { background: var(--yellow-bg); color: var(--yellow); border: 1px solid var(--yellow-border); }
  
  .exam-btn { width: 22px; height: 22px; border-radius: 4px; background: var(--yellow-tint-btn); border: 1px solid var(--yellow-tint-border); color: var(--yellow); font-size: 0.65rem; font-family: var(--font-ui); font-variant-numeric: tabular-nums; cursor: pointer; display: flex; align-items: center; justify-content: center; padding: 0; line-height: 1; opacity: 1; transition: background 0.18s ease; }
  .exam-btn:hover { background: var(--yellow-tint-btn-hover); }
  
  .card-actions { position: absolute; top: 8px; right: 8px; display: flex; gap: 4px; align-items: center; }
  
  .type-badge { display: inline-block; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.62rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; padding: 3px 8px; border-radius: 4px; background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
  .type-badge.t-single   { background: var(--badge-single-bg);  color: var(--badge-single); border-color: var(--badge-single-bd); }
  .type-badge.t-multi    { background: var(--badge-multi-bg);  color: var(--badge-multi); border-color: var(--badge-multi-bd); }
  .type-badge.t-tf       { background: var(--badge-tf-bg);  color: var(--badge-tf); border-color: var(--badge-tf-bd); }
  .type-badge.t-gap      { background: var(--badge-gap-bg);   color: var(--badge-gap); border-color: var(--badge-gap-bd); }

  .mdots { position: absolute; top: 14px; right: 14px; display: flex; gap: 5px; align-items: center; }
  .mdot { width: 8px; height: 8px; border-radius: 50%; background: var(--surface2); border: 1px solid var(--border); box-sizing: border-box; }
  .mdot.on { background: var(--green); border-color: var(--green); }
  .mdot.miss { background: var(--red); border-color: var(--red); }
  .mdots.done .mdot { background: var(--green); border-color: var(--green); }
  
  .qstar { position: absolute; top: 30px; right: 11px; z-index: 3; background: none; border: none; padding: 4px; margin: 0; line-height: 1; cursor: pointer; color: var(--yellow); font-size: 1.1rem; opacity: 0.6; transition: opacity 0.12s, transform 0.1s; -webkit-tap-highlight-color: transparent; }
  .qstar:hover { opacity: 1; transform: scale(1.2); }
  .qstar:active { transform: scale(0.9); }
  .qstar.on { opacity: 1; }
  
  .qsnooze { position: absolute; top: 30px; right: 38px; z-index: 3; background: none; border: none; padding: 4px; margin: 0; line-height: 0; cursor: pointer; color: var(--icon-muted); opacity: 0.95; transition: opacity 0.12s, transform 0.1s, color 0.12s; -webkit-tap-highlight-color: transparent; }
  .qsnooze:hover { opacity: 1; color: var(--text); transform: scale(1.18); }
  .qsnooze:active { transform: scale(0.9); }
  .qsnooze.on { opacity: 1; color: var(--accent); }
  .qtext { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; line-height: 1.45; margin: 13px 0 18px; white-space: pre-wrap; }
  .qscenario { background: var(--surface2); border-left: 3px solid var(--accent); border-radius: 4px; padding: 11px 13px; font-size: 0.84rem; color: var(--text-dim); line-height: 1.58; margin-bottom: 16px; }

  .qimg-wrap { display: flex; flex-direction: column; gap: 8px; margin: 12px 0 14px; }
  .qimg { display: block; max-width: 100%; max-height: 50vh; width: auto; height: auto; object-fit: contain; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; cursor: zoom-in; transition: border-color 0.15s, opacity 0.2s; }
  .qimg:hover { border-color: var(--accent); }
  .qimg.loading { opacity: 0.4; }
  .qimg-caption { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.66rem; color: var(--text-dimmer); text-align: center; margin-top: -2px; }
  .qimg-err { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; color: var(--text-dim); padding: 10px 12px; border: 1px dashed var(--border); border-radius: 8px; text-align: center; }
  
  @media(max-width:580px) {
    .qimg { max-height: 38vh; }
  }
  
  .fbbody .qimg-wrap { margin: 8px 0; }
  .fbbody .qimg { max-height: 40vh; background: var(--inset-bg); }
  @media(max-width:580px) {
    .fbbody .qimg { max-height: 32vh; }
  }

  .qchart-wrap { margin: 12px 0 14px; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 12px; }
  .qchart-canvas-box { position: relative; width: 100%; height: 280px; }
  @media(max-width:580px) { .qchart-canvas-box { height: 220px; } }
  .qchart-title { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); margin-bottom: 8px; }
  .qchart-caption { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.64rem; color: var(--text-dimmer); margin-top: 8px; font-style: italic; }
  
  .qchart-fallback { width: 100%; border-collapse: collapse; font-size: 0.78rem; }
  .qchart-fallback th, .qchart-fallback td { border: 1px solid var(--border); padding: 4px 8px; text-align: left; color: var(--text-dim); }
  .qchart-fallback th { color: var(--text); font-weight: 600; }
  .fbbody .qchart-wrap { background: var(--inset-bg); }

  .examref-item { display: flex; align-items: center; gap: 10px; padding: 8px 12px; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 6px; font-size: 0.8rem; }
  .examref-item .examref-name { flex: 1; min-width: 0; overflow-wrap: anywhere; word-break: break-word; color: var(--text-dim); }
  .examref-item .examref-del { background: none; border: 1px solid var(--border); color: var(--text-dim); border-radius: 6px; padding: 3px 9px; cursor: pointer; font-size: 0.72rem; flex-shrink: 0; }
  .examref-item .examref-del:hover { border-color: var(--red); color: var(--red); }
  .examref-empty { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dimmer); padding: 4px 0; }
  .examref-soltoggle { display: flex; gap: 18px; flex-wrap: wrap; margin: 4px 0 12px; }
  .examref-soltoggle label { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-dim); cursor: pointer; }
  .examref-full { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dimmer); padding: 4px 0 12px; }
  .examref-files { display: flex; flex-wrap: wrap; gap: 6px; }
  .examref-fbadge { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.68rem; color: var(--text-dim); background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 2px 7px; }
  .examref-count { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); margin-bottom: 8px; }
  .examref-inuse { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.62rem; color: var(--green); border: 1px solid var(--green-dim); border-radius: 5px; padding: 1px 6px; flex-shrink: 0; }
  
  .flag-row { margin-top: 14px; text-align: right; }
  .flag-btn { background: none; border: none; color: var(--text-dimmer); font-family: var(--font-ui); font-size: 0.72rem; text-decoration: underline; cursor: pointer; padding: 2px; opacity: 0.8; }
  .flag-btn:hover { color: var(--red); opacity: 1; }
  .flagrep-item { display: flex; align-items: flex-start; gap: 10px; padding: 10px 12px; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 6px; }
  .flagrep-main { flex: 1; min-width: 0; }
  .flagrep-meta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.66rem; color: var(--text-dimmer); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 3px; }
  .flagrep-q { font-size: 0.83rem; color: var(--text-dim); line-height: 1.4; overflow-wrap: anywhere; }
  .flagrep-note { font-size: 0.78rem; color: var(--text-dimmer); font-style: italic; margin-top: 4px; overflow-wrap: anywhere; }
  .flagrep-resolve { background: none; border: 1px solid var(--border); color: var(--text-dim); border-radius: 6px; padding: 3px 9px; cursor: pointer; font-size: 0.72rem; flex-shrink: 0; }
  .flagrep-resolve:hover { border-color: var(--green); color: var(--green); }

  .update-banner { position: fixed; top: 12px; left: 50%; transform: translateX(-50%); z-index: 300; display: flex; align-items: center; gap: 12px; background: var(--surface2); border: 1px solid var(--accent); border-radius: 10px; padding: 10px 14px; max-width: calc(100vw - 24px); box-shadow: 0 6px 24px var(--shadow-strong); }
  .update-banner-text { font-size: 0.82rem; color: var(--text); }
  .update-banner-btn { background: var(--accent); color: var(--accent-fg); border: none; border-radius: 7px; padding: 6px 14px; font-family: var(--font-ui); font-size: 0.8rem; font-weight: 600; cursor: pointer; white-space: nowrap; flex-shrink: 0; }
  .update-banner-btn:hover { filter: brightness(1.08); }
  .update-banner-x { background: none; border: none; color: var(--text-dimmer); font-size: 0.9rem; cursor: pointer; padding: 2px 4px; flex-shrink: 0; }
  .update-banner-x:hover { color: var(--text); }
  @media(max-width:580px) {
    .update-banner { flex-wrap: wrap; top: 8px; padding: 9px 12px; }
    .update-banner-text { flex: 1 1 100%; font-size: 0.78rem; }
  }

  .lightbox { position: fixed; inset: 0; background: var(--lightbox-bg); z-index: 1000; display: none; align-items: center; justify-content: center; padding: 24px; cursor: zoom-out; }
  .lightbox.on { display: flex; }
  .lightbox-img { max-width: 100%; max-height: 100%; object-fit: contain; cursor: zoom-out; }
  .lightbox-close { position: absolute; top: 16px; right: 16px; background: var(--lightbox-btn); border: 1px solid var(--lightbox-btn-bd); color: #fff; width: 36px; height: 36px; border-radius: 50%; font-size: 1.2rem; cursor: pointer; display: flex; align-items: center; justify-content: center; }
  .lightbox-close:hover { background: var(--lightbox-btn-hover); }

  .opts { display: flex; flex-direction: column; gap: 8px; }
  .opt { display: flex; align-items: flex-start; gap: 10px; padding: 11px 14px; border-radius: 10px; border: 1.5px solid var(--border); cursor: pointer; transition: border-color 0.15s, background 0.15s; font-size: 0.86rem; line-height: 1.4; user-select: none; }
  .opt:hover:not(.dis) { border-color: var(--accent); background: var(--accent-bg-soft); }
  .opt.sel { border-color: var(--accent); background: var(--accent-bg-med); }
  .opt.ca { border-color: var(--green); background: var(--green-bg-soft); }
  .opt.wa { border-color: var(--red); background: var(--red-bg-soft); }
  .opt.missed { border-color: var(--yellow); background: var(--yellow-bg-soft); border-style: dashed; }
  .opt.dis { cursor: default; }
  .omark { width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid var(--border); flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 0.68rem; transition: all 0.15s; margin-top: 1px; font-weight: 700; }
  .opt.multi .omark { border-radius: 4px; }
  .opt.sel .omark { border-color: var(--accent); background: var(--accent); color: var(--accent-fg); }
  .opt.ca .omark { border-color: var(--green); background: var(--green); color: var(--on-green); }
  .opt.wa .omark { border-color: var(--red); background: var(--red); color: var(--on-red); }
  .opt.missed .omark { border-color: var(--yellow); background: var(--yellow); color: var(--on-yellow); }
  
  .miss-tag { font-size: 0.65rem; color: var(--text); font-family: var(--font-ui); font-variant-numeric: tabular-nums; margin-left: auto; padding: 2px 6px; border: 1px solid var(--yellow); border-radius: 4px; }

  .gap-wrap { display: flex; flex-direction: column; gap: 12px; margin-bottom: 8px; }
  .gap-row { display: flex; align-items: center; gap: 10px; }
  .gap-label { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.78rem; color: var(--text-dim); min-width: 26px; }
  .gap-input { flex: 1; background: var(--surface2); border: 1.5px solid var(--border); border-radius: 8px; padding: 11px 14px; color: var(--text); font-family: var(--font-ui); font-size: 0.92rem; outline: none; transition: border-color 0.15s, background 0.15s; }
  .gap-input:focus { border-color: var(--accent); background: var(--accent-bg-soft); }
  .gap-input.dis { cursor: default; }
  .gap-input.ca { border-color: var(--green); background: var(--green-bg-soft); color: var(--green); }
  .gap-input.wa { border-color: var(--red); background: var(--red-bg-soft); color: var(--red); }
  .gap-correct-hint { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.74rem; color: var(--green); margin-top: 4px; padding-left: 36px; }

  .fbbox { display: none; padding: 12px 15px; border-radius: 10px; margin-top: 13px; font-size: 0.84rem; line-height: 1.55; }
  .fbbox.on { display: block; }
  .fbbox.c { background: var(--green-bg-soft); border: 1px solid var(--green-dim); }
  .fbbox.w { background: var(--red-bg-soft); border: 1px solid var(--red-dim); }
  
  .fbbody p { margin: 0 0 8px 0; }
  .fbbody p:last-child { margin-bottom: 0; }
  .fbbody strong { color: var(--text); }
  .fbbody em { color: var(--text); font-style: italic; }
  .fbbody .exp-list { margin: 6px 0 8px 0; padding-left: 18px; }
  .fbbody .exp-list li { margin-bottom: 3px; }
  .fbbody .exp-list li:last-child { margin-bottom: 0; }
  .fbbody .exp-more { margin-top: 4px; padding-top: 8px; border-top: 1px dashed var(--hairline); }
  .fbbody .exp-toggle { background: none; border: none; color: var(--text-dimmer); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; cursor: pointer; padding: 6px 0 0 0; margin-top: 4px; transition: color 0.15s; }
  .fbbody .exp-toggle:hover { color: var(--text); }
  .fbhd { font-weight: 700; margin-bottom: 5px; }
  .fbhd.c { color: var(--green); }
  .fbhd.w { color: var(--red); }
  .fbbody { color: var(--text-dim); }

  .qactions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
  .qactions .btn-ghost { flex: 1 1 28%; justify-content: center; }
  .qactions .btn-primary { flex: 1 1 100%; order: 2; justify-content: center; min-height: 50px; font-size: 0.95rem; }

  #stats { max-width: 680px; margin: 0 auto; padding: 40px 28px 0; }
  .stats-title { font-family: var(--font-display); font-weight: 800; font-size: 1.75rem; margin-bottom: 26px; letter-spacing: -0.02em; }
  .sgrid { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; margin-bottom: 24px; }
  @media(max-width:560px){ .sgrid { grid-template-columns: repeat(2,1fr); } }
  .topic-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; margin-bottom: 24px; }
  .topic-head { font-family: var(--font-display); font-weight: 700; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
  .beta-tag { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.55rem; letter-spacing: 0.08em; color: var(--accent); border: 1px solid var(--accent); border-radius: 4px; padding: 1px 5px; opacity: 0.85; }
  .topic-sub { font-size: 0.78rem; color: var(--text-dim); margin: 4px 0 12px; }
  .topic-empty { font-size: 0.82rem; color: var(--text-dim); line-height: 1.5; margin-top: 8px; }
  .topic-row { display: flex; align-items: center; gap: 12px; padding: 8px 0; border-top: 1px solid var(--border); }
  .topic-name { flex: 1; font-size: 0.86rem; color: var(--text); overflow-wrap: anywhere; }
  .topic-acc { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.85rem; font-weight: 600; min-width: 42px; text-align: right; }
  .scard { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-align: center; }
  
  .cgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px,1fr)); gap: 12px; margin-bottom: 24px; }
  
  .ccard { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px; cursor: pointer; text-align: left; transition: border-color .15s, transform .15s; color: var(--text); font-family: inherit; font-size: 0.9rem; }
  .ccard:hover { border-color: var(--accent); transform: translateY(-2px); }
  .ccard.on { border-color: var(--accent); }
  .ccard-name { font-weight: 600; margin-bottom: 6px; line-height: 1.3; }
  .ccard-meta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); }
  .ccard-add { border-style: dashed; display: flex; align-items: center; justify-content: center; min-height: 96px; color: var(--text-dim); text-align: center; }
  
  .course-switch { background: var(--surface2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 10px; font-size: 0.72rem; font-family: var(--font-ui); font-variant-numeric: tabular-nums; cursor: pointer; max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .course-switch:hover { border-color: var(--accent); color: var(--accent); }
  .snum { font-family: var(--font-display); font-weight: 800; font-size: 1.9rem; margin-bottom: 3px; }
  .slbl { font-size: 0.72rem; color: var(--text-dim); }
  .bdrow { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 13px 16px; display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
  .bdlbl { font-family: var(--font-display); font-weight: 600; font-size: 0.83rem; min-width: 68px; }
  .bdtrack { flex: 1; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
  .bdfill { height: 100%; background: var(--green); border-radius: 3px; transition: width 0.6s; }
  .bdpct { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); min-width: 34px; text-align: right; }

  .res { text-align: center; padding: 32px 16px; }
  .res-emoji { font-size: 3.5rem; margin-bottom: 14px; }
  .res-title { font-family: var(--font-display); font-weight: 800; font-size: 1.75rem; margin-bottom: 6px; }
  .res-sub { color: var(--text-dim); margin-bottom: 22px; }
  .res-score { font-family: var(--font-display); font-weight: 800; font-size: 3.5rem; color: var(--green); margin-bottom: 4px; }

  .bottom-nav { position: fixed; bottom: 0; left: 0; right: 0; background: var(--surface); border-top: 1px solid var(--border); display: flex; justify-content: center; gap: 4px; padding: 10px 20px; z-index: 100; }
  .nbtn { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 7px 22px; border-radius: 8px; background: transparent; border: none; color: var(--text-dim); font-size: 0.63rem; font-family: var(--font-ui); font-variant-numeric: tabular-nums; text-transform: uppercase; letter-spacing: 0.05em; cursor: pointer; transition: color 0.15s, background 0.15s; }
  .nbtn:hover { color: var(--text); background: var(--surface2); }
  .nbtn.active { color: var(--accent); }
  
  @media (max-width: 480px) {
    .bottom-nav { padding: 10px 8px; }
    .nbtn { padding: 7px 14px; }
  }
  .ni { font-size: 1.1rem; }
  .spacer { height: 76px; }

  .modal-ov { position: fixed; inset: 0; background: var(--overlay); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 20px; }
  .modal-ov.hidden { display: none; }
  
  .modal { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px; max-width: 520px; width: 100%; max-height: 90vh; overflow-y: auto; overflow-x: hidden; }
  .modal h2 { font-family: var(--font-display); font-weight: 700; margin-bottom: 8px; font-size: 1.15rem; }
  .modal p { color: var(--text-dim); font-size: 0.86rem; margin-bottom: 14px; line-height: 1.55; }
  .modal input, .modal select { width: 100%; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 10px 13px; color: var(--text); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.8rem; margin-bottom: 13px; outline: none; transition: border-color 0.15s; }
  .modal input:focus, .modal select:focus { border-color: var(--accent); }
  .mnote { font-size: 0.7rem; color: var(--text-dimmer); margin-top: 10px; }

  .setup-section { margin-bottom: 20px; }
  
  .setup-section.dimmed, #selAllRow.dimmed { opacity: 0.4; pointer-events: none; filter: grayscale(0.4); transition: opacity 0.15s; }
  
  .setup-radio.disabled { opacity: 1; cursor: default; }
  .setup-radio.disabled .setup-radio-name,
  .setup-radio.disabled .setup-radio-desc,
  .setup-radio.disabled .setup-radio-count { color: var(--text-dim); }
  .setup-radio.disabled:hover { border-color: var(--border); background: var(--surface2); }
  .setup-note { font-size: 0.78rem; color: var(--accent); margin-top: 10px; line-height: 1.45; padding: 8px 10px; background: var(--accent-tint); border-radius: 8px; }
  .setup-section-title { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
  .setup-checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .setup-check { display: flex; align-items: center; gap: 9px; padding: 9px 12px; border-radius: 8px; border: 1.5px solid var(--border); background: var(--surface2); cursor: pointer; transition: all 0.15s; font-size: 0.84rem; user-select: none; }
  .setup-check:hover:not(.disabled) { border-color: var(--accent); }
  .setup-check.checked { border-color: var(--accent); background: var(--accent-bg-med); }
  .setup-check.disabled { opacity: 0.4; cursor: not-allowed; }
  .setup-check-box { width: 16px; height: 16px; border-radius: 4px; border: 1.5px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 0.65rem; font-weight: 700; color: var(--accent-fg); flex-shrink: 0; transition: all 0.15s; }
  .setup-check.checked .setup-check-box { border-color: var(--accent); background: var(--accent); }
  
  .setup-check-info { flex: 1; min-width: 0; }
  .setup-check-name { font-weight: 600; overflow-wrap: anywhere; word-break: break-word; }
  
  .setup-check-meta { font-size: 0.7rem; color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; margin-top: 1px; }

  .exam-modes { display: flex; gap: 6px; }
  .exam-mode-btn { flex: 1; padding: 10px 8px; border-radius: 8px; border: 1.5px solid var(--border); background: var(--surface2); cursor: pointer; transition: all 0.15s; text-align: center; user-select: none; }
  .exam-mode-btn:hover { border-color: var(--yellow-border); }
  .exam-mode-btn.checked { border-color: var(--yellow); background: var(--yellow-tint); }
  .exam-mode-btn-name { font-size: 0.84rem; font-weight: 600; }
  .exam-mode-btn.checked .exam-mode-btn-name { color: var(--yellow); }
  
  .exam-mode-btn-count { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.65rem; color: var(--text-dim); margin-top: 3px; }

  .setup-radios { display: flex; flex-direction: column; gap: 6px; }
  .setup-radio { display: flex; align-items: flex-start; gap: 10px; padding: 11px 13px; border-radius: 8px; border: 1.5px solid var(--border); background: var(--surface2); cursor: pointer; transition: all 0.15s; }
  .setup-radio:hover { border-color: var(--accent); }
  .setup-radio.checked { border-color: var(--accent); background: var(--accent-bg-med); }
  .setup-radio-dot { width: 16px; height: 16px; border-radius: 50%; border: 1.5px solid var(--border); flex-shrink: 0; display: flex; align-items: center; justify-content: center; margin-top: 1px; transition: all 0.15s; }
  .setup-radio.checked .setup-radio-dot { border-color: var(--accent); }
  .setup-radio.checked .setup-radio-dot::after { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
  .setup-radio-info { flex: 1; }
  .setup-radio-name { font-size: 0.88rem; font-weight: 600; margin-bottom: 1px; }
  .setup-radio-desc { font-size: 0.75rem; color: var(--text-dim); line-height: 1.4; }
  .setup-radio-count { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--accent); margin-top: 3px; }

  .count-row { display: flex; gap: 6px; }
  .count-btn { flex: 1; padding: 9px 10px; border-radius: 8px; border: 1.5px solid var(--border); background: var(--surface2); color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.8rem; cursor: pointer; transition: all 0.15s; }
  .count-btn:hover { border-color: var(--accent); color: var(--text); }
  .count-btn.checked { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }

  .modal-actions { display: flex; gap: 10px; margin-top: 16px; }
  .modal-actions .btn { flex: 1; justify-content: center; }

  .streak-dots { display: inline-flex; gap: 2px; margin-left: 4px; vertical-align: middle; }
  .streak-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--border); }
  .streak-dot.on { background: var(--green); }

  .toast { position: fixed; top: 20px; right: 20px; background: var(--surface2); border: 1px solid var(--border); border-radius: 10px; padding: 10px 15px; font-size: 0.8rem; z-index: 999; transform: translateY(-10px); opacity: 0; transition: all 0.3s; max-width: 280px; pointer-events: none; }
  .toast.on { transform: translateY(0); opacity: 1; }
  .toast.ok { border-color: var(--green-dim); }
  .toast.err { border-color: var(--red-dim); }

  #signin { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
  .signin-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 40px; max-width: 460px; width: 100%; }
  .signin-logo { font-family: var(--font-display); font-weight: 800; font-size: 1.6rem; letter-spacing: -0.02em; text-align: center; margin-bottom: 8px; }
  .signin-logo span { color: var(--accent); }
  .signin-tagline { text-align: center; color: var(--text-dim); font-size: 0.9rem; margin-bottom: 32px; line-height: 1.5; }
  .signin-input { width: 100%; background: var(--surface2); border: 1.5px solid var(--border); border-radius: 8px; padding: 12px 14px; color: var(--text); font-family: var(--font-ui); font-size: 0.95rem; margin-bottom: 14px; outline: none; transition: border-color 0.15s; }
  .signin-input:focus { border-color: var(--accent); }
  .signin-btn { width: 100%; justify-content: center; padding: 13px; }
  .signin-msg { margin-top: 16px; padding: 12px 14px; border-radius: 8px; font-size: 0.85rem; line-height: 1.5; display: none; }
  .signin-msg.show { display: block; }
  .signin-msg.success { background: var(--green-bg-soft); border: 1px solid var(--green-dim); color: var(--green); }
  .signin-msg.error { background: var(--red-bg-soft); border: 1px solid var(--red-dim); color: var(--red); }
  .signin-codehint { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 12px; line-height: 1.45; }
  .signin-code-input { text-align: center; letter-spacing: 0.4em; font-size: 1.4rem; font-family: var(--font-ui); font-variant-numeric: tabular-nums; }
  .signin-subactions { display: flex; justify-content: space-between; gap: 12px; margin-top: 4px; }
  .signin-link { background: none; border: none; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.8rem; cursor: pointer; text-decoration: underline; padding: 4px; }
  .signin-link:hover { color: var(--accent); }
  .signin-info { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 0.78rem; color: var(--text-dimmer); line-height: 1.6; text-align: center; }

  .sync-overlay { position: fixed; inset: 0; background: var(--bg); z-index: 300; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 14px; }
  .sync-overlay.hidden { display: none; }
  .sync-spinner { width: 40px; height: 40px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
  @keyframes spin { to { transform: rotate(360deg); } }
  .sync-text { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.85rem; color: var(--text-dim); }

  .theme-row { padding: 6px 10px 8px; }
  .theme-label { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-dimmer); margin-bottom: 6px; }
  .theme-seg { display: flex; gap: 4px; }
  
  .theme-opt { flex: 1; padding: 6px 4px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface2); color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.68rem; cursor: pointer; transition: border-color 0.15s, background 0.15s, color 0.15s; }
  .theme-opt:hover { border-color: var(--accent); color: var(--text); }
  .theme-opt.on { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
  
  .course-newdot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-right: 6px; vertical-align: middle; flex-shrink: 0; }
  
  .crchip.expired { background: var(--surface); border-style: dashed; }
  .crchip.expired .crchip-name { color: var(--text-dim); font-weight: 500; }
  .crchip.expired .crchip-meta { color: var(--yellow); }
  .crchip-lock { font-size: 0.7rem; }
  .crchip-add { border-style: dashed; color: var(--text-dim); display: flex; align-items: center; font-size: 0.84rem; }
  .crchip-add:hover { color: var(--accent); }
  @media(max-width:580px) {
    .courserow-wrap { margin-bottom: 18px; }
    .crchip { padding: 8px 11px; }
  }

  .cpick { display: block; width: 100%; text-align: left; background: var(--surface2); border: 1px solid var(--border); border-radius: 9px; padding: 10px 12px; margin-bottom: 6px; cursor: pointer; color: var(--text); font-family: inherit; transition: border-color .15s, background .15s; }
  .cpick:hover { border-color: var(--accent); background: var(--accent-bg); }
  .cpick-name { font-size: 0.86rem; font-weight: 600; line-height: 1.3; }
  .cpick-meta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; color: var(--text-dim); margin-top: 2px; }
  .cpick-mine { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.6rem; color: var(--green); border: 1px solid var(--green-dim); border-radius: 4px; padding: 1px 5px; margin-left: 6px; vertical-align: middle; }
  .cpick-empty { font-size: 0.8rem; color: var(--text-dim); line-height: 1.5; padding: 14px 2px; text-align: center; }
  
  .fs-manual-link { display: block; width: 100%; background: none; border: none; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.76rem; text-decoration: underline; cursor: pointer; padding: 2px 0 12px; text-align: left; }
  .fs-manual-link:hover { color: var(--accent); }

  .usage-panel { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; margin-top: 28px; }
  .usage-title { font-family: var(--font-display); font-weight: 700; font-size: 1rem; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
  .usage-badge { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.55rem; letter-spacing: 0.08em; color: var(--accent); border: 1px solid var(--accent); border-radius: 4px; padding: 1px 5px; }
  .usage-note { font-size: 0.76rem; color: var(--text-dim); line-height: 1.5; margin-bottom: 12px; }
  .usage-err { color: var(--yellow); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; }
  .usage-step { display: flex; align-items: baseline; gap: 10px; padding: 7px 0; border-top: 1px solid var(--border); }
  
  .usage-step.key .usage-step-label { color: var(--accent); font-weight: 600; }
  .usage-step.key .usage-step-n { color: var(--accent); }
  .usage-step-label { flex: 1; font-size: 0.83rem; }
  .usage-step-n { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.95rem; font-weight: 600; min-width: 48px; text-align: right; }
  .usage-step-pct { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); min-width: 42px; text-align: right; }
  .usage-row { display: flex; justify-content: space-between; gap: 12px; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.7rem; color: var(--text-dim); margin-top: 10px; flex-wrap: wrap; }
  .usage-chart-box { position: relative; width: 100%; height: 190px; margin-bottom: 4px; }
  
  .usage-defs { font-size: 0.72rem; color: var(--text-dim); line-height: 1.55; margin-top: 14px; padding-top: 10px; border-top: 1px solid var(--border); }
  .usage-trend-label { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin: 16px 0 6px; }

  .cal-src { color: var(--accent); text-decoration: underline; margin-left: 4px; white-space: nowrap; }
  .cal-warn { font-size: 0.76rem; color: var(--yellow); line-height: 1.5; background: var(--yellow-bg-soft); border: 1px solid var(--yellow-border); border-radius: 8px; padding: 8px 10px; margin-bottom: 12px; }
  .cal-table { width: 100%; border-collapse: collapse; font-size: 0.78rem; margin-bottom: 14px; }
  
  .cal-table th { text-align: left; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); font-weight: 400; padding-bottom: 6px; padding-right: 10px; white-space: nowrap; }
  .cal-table td { padding-right: 10px; }
  .cal-table td { padding: 6px 0; border-top: 1px solid var(--border); font-family: var(--font-ui); font-variant-numeric: tabular-nums; }
  .cal-until { color: var(--accent); }
  .cal-edit { background: none; border: 1px solid var(--border); border-radius: 5px; color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.64rem; padding: 2px 7px; cursor: pointer; }
  .cal-edit:hover { border-color: var(--accent); color: var(--accent); }
  .cal-form { border-top: 1px solid var(--border); padding-top: 12px; }
  .cal-form-title { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 8px; }
  .cal-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 8px; margin-bottom: 10px; }
  .cal-fields label { display: flex; flex-direction: column; gap: 3px; font-size: 0.7rem; color: var(--text-dim); }
  
  .cal-fields input { background: var(--surface2); border: 1px solid var(--border); border-radius: 7px; padding: 7px 9px; color: var(--text); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.76rem; outline: none; }
  .cal-fields input:focus { border-color: var(--accent); }
  .cal-preview { font-size: 0.76rem; color: var(--text-dim); margin-bottom: 10px; }

  .seed-prog { margin-top: 12px; font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.72rem; color: var(--text-dim); line-height: 1.5; word-break: break-word; }
  .seed-report { margin-top: 12px; background: var(--surface2); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; font-size: 0.8rem; line-height: 1.6; }
  .seed-count { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 9px; }
  .seed-group { font-size: 0.68rem; font-family: var(--font-ui); font-variant-numeric: tabular-nums; text-transform: uppercase; letter-spacing: 0.07em; margin: 12px 0 5px; }
  .seed-group:first-of-type { margin-top: 0; }
  .seed-row { margin-bottom: 4px; word-break: break-word; }
  
  .seed-row .seed-meta { color: var(--text-dim); }
  .seed-ok   { color: var(--green); }
  .seed-skip { color: var(--text-dim); }
  .seed-bad  { color: var(--red); }

  .examadmin { border-top: 1px solid var(--border); padding: 12px 0; }
  .examadmin:first-of-type { border-top: none; }
  .examadmin.retired { opacity: 0.55; }
  .examadmin-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
  .examadmin-label { font-size: 0.84rem; font-weight: 600; line-height: 1.3; }
  .examadmin-tag { font-size: 0.55rem; letter-spacing: 0.08em; padding: 1px 5px; border-radius: 3px; background: var(--surface2); color: var(--text-dim); vertical-align: middle; }
  .examadmin-meta { font-size: 0.68rem; color: var(--text-dim); margin-top: 3px; line-height: 1.5; word-break: break-word; }
  .examadmin-files { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
  .examadmin-file { background: var(--accent-tint); border: 1px solid var(--accent-tint-border); color: var(--accent); border-radius: 5px; font-family: var(--font-ui); font-size: 0.66rem; padding: 3px 9px; cursor: pointer; }
  .examadmin-file:hover { background: var(--accent-tint-strong); }
  .examadmin-usage { font-size: 0.68rem; color: var(--text-dim); margin-top: 8px; line-height: 1.5; }

  .check-q { background: var(--surface2); border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px; }
  .check-q-type { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.58rem; letter-spacing: 0.1em; color: var(--text-dim); margin-bottom: 4px; }
  .check-q-text { font-size: 0.84rem; color: var(--text); line-height: 1.45; }

  .theme-more { width: 100%; margin-top: 5px; padding: 6px 8px; border-radius: 6px; border: 1px solid var(--border); background: none; color: var(--text-dim); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.66rem; text-align: left; cursor: pointer; transition: border-color 0.15s, color 0.15s; }
  .theme-more:hover { border-color: var(--accent); color: var(--accent); }
  
  .modal-ov.theme-ov { background: transparent; }
  .modal-ov.theme-ov .modal { box-shadow: 0 16px 56px var(--shadow-strong), 0 0 0 1px var(--border); }
  .theme-pick-name { font-weight: 600; }
  .theme-pick-tag { font-size: 0.72rem; color: var(--text-dim); margin-top: 2px; line-height: 1.35; }
  
  .theme-nudge { position: absolute; top: calc(100% + 8px); right: 0; z-index: 70; width: 232px; background: var(--surface); border: 1px solid var(--accent); border-radius: 10px; padding: 11px 12px; box-shadow: 0 8px 24px var(--shadow); }
  .theme-nudge::before { content: ''; position: absolute; top: -6px; right: 14px; width: 10px; height: 10px; background: var(--surface); border-left: 1px solid var(--accent); border-top: 1px solid var(--accent); transform: rotate(45deg); }
  .theme-nudge-text { font-size: 0.78rem; color: var(--text); line-height: 1.45; margin-bottom: 9px; }
  .theme-nudge-actions { display: flex; gap: 6px; }
  .theme-nudge-btn { flex: 1; padding: 5px 8px; border-radius: 6px; border: none; background: var(--accent); color: var(--accent-fg); font-family: var(--font-ui); font-size: 0.74rem; font-weight: 600; cursor: pointer; }
  .theme-nudge-x { padding: 5px 8px; border-radius: 6px; border: 1px solid var(--border); background: none; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.74rem; cursor: pointer; }

  .exam-nudge { display: flex; align-items: flex-start; gap: 10px; margin: 4px 0 20px; background: var(--surface); border: 1px solid var(--accent); border-radius: 10px; padding: 12px 13px; box-shadow: 0 6px 18px var(--shadow); }
  .exam-nudge-icon { font-size: 1.1rem; line-height: 1.35; flex-shrink: 0; }
  .exam-nudge-body { flex: 1; min-width: 0; }
  .exam-nudge-text { font-size: 0.82rem; color: var(--text); line-height: 1.45; margin-bottom: 9px; }
  .exam-nudge-actions { display: flex; gap: 6px; flex-wrap: wrap; }
  .exam-nudge-btn { padding: 5px 11px; border-radius: 6px; border: none; background: var(--accent); color: var(--accent-fg); font-family: var(--font-ui); font-size: 0.74rem; font-weight: 600; cursor: pointer; }
  .exam-nudge-x { padding: 5px 10px; border-radius: 6px; border: 1px solid var(--border); background: none; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.74rem; cursor: pointer; }

  #fbMessage { width: 100%; background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); padding: 10px; font-size: 0.9rem; font-family: inherit; line-height: 1.5; resize: vertical; }
  #fbMessage:focus { outline: none; border-color: var(--accent); }
  .fb-count { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.66rem; color: var(--text-dimmer); text-align: right; margin-top: 4px; }
  
  .fb-mine-head { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin: 20px 0 8px; padding-top: 14px; border-top: 1px solid var(--border); }
  .fb-mine-item { background: var(--surface2); border: 1px solid var(--border); border-radius: 8px; padding: 9px 11px; margin-bottom: 7px; }
  .fb-mine-item.pending { border-color: var(--yellow-border); }
  .fb-mine-msg { font-size: 0.82rem; line-height: 1.4; overflow-wrap: anywhere; }
  .fb-mine-meta { font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.68rem; color: var(--text-dim); margin-top: 3px; line-height: 1.45; }
  .fb-mine-link { background: none; border: none; color: var(--text-dim); font-family: var(--font-ui); font-size: 0.68rem; text-decoration: underline; cursor: pointer; padding: 2px 0 0; }
  .fb-mine-link:hover { color: var(--text); }

  #nAdmin { position: relative; }
  .admin-badge { position: absolute; top: 2px; right: 8px; min-width: 15px; height: 15px; padding: 0 4px; border-radius: 8px; background: var(--accent); color: var(--accent-fg); font-family: var(--font-ui); font-variant-numeric: tabular-nums; font-size: 0.58rem; line-height: 15px; text-align: center; }