:root {
    --ink: #143244;
    --muted: #294a5f;
    --line: rgba(22, 59, 80, 0.2);
    --line-strong: rgba(22, 59, 80, 0.32);
    --glass: rgba(255, 255, 255, 0.56);
    --glass-strong: rgba(255, 255, 255, 0.74);
    --shadow: 0 20px 44px rgba(14, 42, 62, 0.16);
    --radius: 18px;
    --radius-sm: 12px;
    --focus: #0f7c8b;
    --focus-ring: #0a6379;
    --cta-bg: #12394f;
    --cta-bg-hover: #0f3042;
    --cta-ink: #eef7fb;
  }

  * {
    box-sizing: border-box;
  }

  body.glass-theme {
    margin: 0;
    min-height: 100vh;
    padding: 34px 16px 44px;
    color: var(--ink);
    font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.52;
    background:
      radial-gradient(880px 540px at -8% -8%, #ffffff 0%, rgba(255, 255, 255, 0) 60%),
      radial-gradient(860px 480px at 112% -4%, rgba(132, 205, 224, 0.48) 0%, rgba(132, 205, 224, 0) 60%),
      linear-gradient(140deg, #dbeaf5 0%, #e5f3ee 44%, #edf3fb 100%);
    position: relative;
  }

  body.glass-theme::before {
    content: "";
    position: fixed;
    top: -140px;
    left: -120px;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.76), rgba(255, 255, 255, 0));
    pointer-events: none;
    z-index: 0;
  }

  body.glass-theme::after {
    content: "";
    position: fixed;
    right: -80px;
    bottom: -120px;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    background: radial-gradient(circle at 50% 50%, rgba(98, 183, 194, 0.22), rgba(98, 183, 194, 0));
    pointer-events: none;
    z-index: 0;
  }

  .shell {
    max-width: 1160px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
  }

  .skip-link {
    position: absolute;
    left: 16px;
    top: -44px;
    z-index: 10;
    padding: 8px 12px;
    border-radius: 10px;
    color: #fff;
    background: #0d3f56;
    text-decoration: none;
    font-weight: 700;
  }

  .skip-link:focus {
    top: 10px;
  }

  .visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  main {
    display: block;
  }

  h1,
  h2,
  h3 {
    font-family: "Trebuchet MS", "Avenir Next", "Segoe UI", sans-serif;
    letter-spacing: -0.02em;
    color: #0f2f42;
  }

  .top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
  }

  .row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
  }

  .muted {
    color: var(--muted);
    font-size: 15px;
  }

  .pill {
    display: inline-block;
    padding: 4px 10px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    font-size: 12px;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
  }

  .card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
    margin-top: 16px;
    background: var(--glass);
    backdrop-filter: blur(14px) saturate(150%);
    -webkit-backdrop-filter: blur(14px) saturate(150%);
    box-shadow: var(--shadow);
    transition: transform 180ms ease, box-shadow 180ms ease;
  }

  .card:hover {
    transform: translateY(-2px);
    box-shadow: 0 24px 52px rgba(14, 42, 62, 0.18);
  }

  label {
    display: block;
    margin-top: 10px;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #365a6d;
  }

  input,
  textarea,
  select {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--line);
    background: var(--glass-strong);
    color: var(--ink);
    font-size: 15px;
    font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    transition: border-color 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
  }

  textarea {
    min-height: 90px;
  }

  input:focus,
  textarea:focus,
  select:focus {
    border-color: var(--focus);
    box-shadow: 0 0 0 3px rgba(15, 124, 139, 0.16);
    outline: none;
    background: rgba(255, 255, 255, 0.88);
  }

  button,
  .btn,
  .quick {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(9, 31, 44, 0.24);
    background: linear-gradient(155deg, var(--cta-bg), var(--cta-bg-hover));
    color: var(--cta-ink);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform 130ms ease, box-shadow 130ms ease, filter 130ms ease;
  }

  button:hover,
  .btn:hover,
  .quick:hover {
    transform: translateY(-1px);
    filter: brightness(1.04);
    box-shadow: 0 10px 24px rgba(10, 34, 51, 0.2);
  }

  button:active,
  .btn:active,
  .quick:active {
    transform: translateY(0);
  }

  button:disabled,
  .btn[aria-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.74;
    filter: grayscale(0.2);
  }

  button:focus-visible,
  .btn:focus-visible,
  .quick:focus-visible,
  a:focus-visible,
  input:focus-visible,
  textarea:focus-visible,
  select:focus-visible,
  summary:focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
  }

  a {
    color: #0d5e78;
    text-decoration-color: rgba(13, 94, 120, 0.4);
    text-underline-offset: 2px;
  }

  a:hover {
    color: #0a4961;
    text-decoration-color: rgba(10, 73, 97, 0.65);
  }

  table {
    width: 100%;
    border-collapse: collapse;
  }

  th,
  td {
    padding: 10px;
    border-bottom: 1px solid rgba(22, 59, 80, 0.15);
    text-align: left;
    vertical-align: top;
    font-size: 15px;
  }

  tbody tr:hover {
    background: rgba(255, 255, 255, 0.42);
  }

  th {
    font-size: 14px;
    color: #3b6175;
    font-weight: 700;
  }

  pre {
    margin: 0;
    white-space: pre-wrap;
    color: #26495d;
    font-size: 15px;
    line-height: 1.5;
  }

  .state-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid rgba(22, 59, 80, 0.24);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.62);
    color: #133649;
  }

  .state-pill--open {
    border-color: rgba(25, 98, 67, 0.34);
    background: rgba(223, 248, 235, 0.8);
    color: #1b5e3d;
  }

  .state-pill--locked {
    border-color: rgba(133, 84, 23, 0.34);
    background: rgba(255, 241, 221, 0.86);
    color: #744412;
  }

  .state-pill--done {
    border-color: rgba(19, 96, 80, 0.36);
    background: rgba(216, 248, 243, 0.85);
    color: #17594a;
  }

  @media (max-width: 780px) {
    body.glass-theme {
      padding-top: 22px;
    }
    .card {
      padding: 14px;
    }
    .row {
      align-items: flex-start;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation: none !important;
      transition: none !important;
    }
  }

  @media (prefers-contrast: more) {
    :root {
      --line: rgba(22, 59, 80, 0.34);
      --line-strong: rgba(22, 59, 80, 0.46);
    }
    .card,
    .pill,
    input,
    textarea,
    select {
      border-width: 2px;
    }
    .muted {
      color: #1e4155;
    }
  }

  @supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
    .card {
      background: #f6fafc;
    }
    .pill {
      background: #eef5f9;
    }
    input,
    textarea,
    select {
      background: #f9fcfe;
    }
  }

  .glass-bg-orbs {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
  }

  .glass-bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: saturate(110%);
  }

  body.glass-theme.teacher-comfort {
    line-height: 1.6;
    background:
      linear-gradient(150deg, #e4edf6 0%, #ecf4ef 50%, #f1f5fb 100%);
  }

  body.glass-theme.teacher-comfort::before,
  body.glass-theme.teacher-comfort::after {
    display: none;
  }

  body.glass-theme.teacher-comfort .card {
    padding: 22px;
    margin-top: 22px;
    background: rgba(255, 255, 255, 0.68);
    box-shadow: 0 14px 30px rgba(14, 42, 62, 0.13);
  }

  body.glass-theme.teacher-comfort .card:hover {
    transform: none;
    box-shadow: 0 14px 30px rgba(14, 42, 62, 0.13);
  }

  body.glass-theme.teacher-comfort .top,
  body.glass-theme.teacher-comfort .row {
    gap: 16px;
  }

  body.glass-theme.teacher-comfort .muted {
    line-height: 1.58;
  }

  body.glass-theme.teacher-comfort .navline {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 8px;
    max-width: 980px;
  }

  body.glass-theme.teacher-comfort label {
    margin-top: 12px;
    margin-bottom: 8px;
    text-transform: none;
    letter-spacing: 0.01em;
  }

  body.glass-theme.teacher-comfort input,
  body.glass-theme.teacher-comfort textarea,
  body.glass-theme.teacher-comfort select {
    padding: 12px 14px;
  }

  body.glass-theme.teacher-comfort button,
  body.glass-theme.teacher-comfort .btn,
  body.glass-theme.teacher-comfort .quick {
    min-height: 40px;
  }

  body.glass-theme.teacher-comfort th,
  body.glass-theme.teacher-comfort td {
    padding: 13px 12px;
    line-height: 1.52;
  }

  body.glass-theme.teacher-comfort .glass-bg-orbs {
    display: none;
  }