/* Dr. Pinky Goswami — "The Campus Board" (Shreya WS1 build #4).
   Ivory, deep green, mustard. Seminar-notice cards on a board. System stacks. */
@layer base, components;

@layer base {
  :root {
    color-scheme: light dark;
    --paper: #f6f1e7;
    --ink: #22301f;
    --green: #1e4d3b;
    --mustard: #c9971c;
    --line: color-mix(in srgb, var(--green) 22%, transparent);
    --card: #fffdf8;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --paper: #17201a;
      --ink: #ece7d9;
      --green: #9dc7ae;
      --mustard: #d9ae4a;
      --card: #1d2820;
    }
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 16px/1.6 system-ui, "Segoe UI", sans-serif;
  }
  h1, h2, h3 {
    font-family: Georgia, "Iowan Old Style", serif;
    font-weight: 650;
    line-height: 1.2;
    margin: 0;
  }
  a { color: var(--green); }
  a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
    outline: 2px solid var(--mustard);
    outline-offset: 2px;
  }
  section { scroll-margin-top: 86px; }
}

@layer components {
  .skip-link {
    position: absolute;
    inset-inline-start: -999px;
    &:focus { inset-inline-start: 12px; inset-block-start: 8px; background: var(--paper); padding: 6px 10px; }
  }

  /* ---- header ---- */
  .board-head {
    position: sticky;
    inset-block-start: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: color-mix(in srgb, var(--paper) 90%, transparent);
    backdrop-filter: blur(6px);
    border-block-end: 3px double var(--line);
  }
  .board-identity {
    margin: 0;
    display: flex;
    align-items: baseline;
    gap: 10px;
    min-width: 0;
    flex: 0 1 auto;
    overflow: hidden;
  }
  .board-seal {
    font: 700 0.95rem Georgia, serif;
    color: var(--paper);
    background: var(--green);
    border-radius: 6px;
    padding: 3px 7px;
    letter-spacing: 0.06em;
    flex-shrink: 0;
  }
  .board-name {
    font-weight: 650;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .board-sub { display: none; font-size: 0.78rem; color: color-mix(in srgb, var(--ink) 60%, transparent); }
  @media (min-width: 900px) { .board-sub { display: inline; } }

  .board-nav {
    margin-inline-start: auto;
    display: flex;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
    &::-webkit-scrollbar { display: none; }
    & a {
      padding: 6px 9px;
      font-size: 0.8rem;
      text-decoration: none;
      color: color-mix(in srgb, var(--ink) 70%, transparent);
      white-space: nowrap;
      &:hover { color: var(--green); }
    }
  }
  .board-enrol {
    font-weight: 650;
    color: var(--mustard) !important;
    border: 1px solid var(--mustard);
    border-radius: 999px;
    padding: 4px 12px !important;
  }

  .theme-toggle {
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink);
    border-radius: 8px;
    padding: 7px;
    cursor: pointer;
    & .ic-moon { display: none; }
  }
  [data-theme="dark"] .theme-toggle {
    & .ic-sun { display: none; }
    & .ic-moon { display: block; }
  }

  /* ---- notice hero ---- */
  .board-main { max-width: 900px; margin: 0 auto; padding: 24px 18px 80px; }
  .notice { text-align: center; padding-block: 40px 24px; }
  .notice-label {
    font: 600 0.72rem/1 ui-monospace, monospace;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--mustard);
    margin: 0 0 14px;
  }
  .notice h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); color: var(--green); }
  .notice-line { max-width: 54ch; margin: 12px auto 8px; font-size: 1.1rem; }
  .notice-sub { color: color-mix(in srgb, var(--ink) 62%, transparent); font-size: 0.95rem; }

  .board-art {
    margin: 24px auto 0;
    max-width: 380px;
    & svg { width: 100%; display: block; }
    & figcaption { font-size: 0.85rem; font-style: italic; color: color-mix(in srgb, var(--ink) 60%, transparent); margin-block-start: 6px; }
  }
  .art-frame { fill: none; stroke: var(--green); stroke-width: 3; }
  .art-card { fill: var(--card); stroke: var(--line); }
  .art-pin { fill: var(--mustard); }
  .art-rule { stroke: color-mix(in srgb, var(--green) 45%, transparent); stroke-width: 2; stroke-linecap: round; }

  /* ---- sections + programme cards ---- */
  .board-section {
    padding-block: 30px 8px;
    border-block-start: 3px double var(--line);
    margin-block-start: 22px;
    & h2 { margin-block-end: 16px; }
  }
  .dept-label {
    font-variant: small-caps;
    letter-spacing: 0.06em;
    font-size: 1.25rem;
  }
  .card-grid {
    display: grid;
    gap: 12px;
    @media (min-width: 640px) { grid-template-columns: 1fr 1fr; }
    @media (min-width: 900px) { grid-template-columns: repeat(3, 1fr); }
  }
  .programme-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-block-start: 4px solid var(--mustard);
    border-radius: 8px;
    padding: 14px 16px;
    & h3 { font-size: 1rem; margin-block-end: 6px; color: var(--green); }
    & p { margin: 0; font-size: 0.92rem; color: color-mix(in srgb, var(--ink) 78%, transparent); }
  }

  /* ---- clinic ---- */
  .clinic-card {
    font-style: normal;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px 18px;
    max-width: 560px;
  }
  .clinic-note { display: block; margin-block-start: 6px; color: color-mix(in srgb, var(--ink) 62%, transparent); font-size: 0.9rem; }

  /* ---- about ---- */
  .about-grid {
    display: grid;
    gap: 18px;
    @media (min-width: 640px) { grid-template-columns: 150px 1fr; }
  }
  .portrait-slot {
    display: grid;
    place-items: center;
    align-content: center;
    gap: 8px;
    border: 1px dashed var(--line);
    border-radius: 8px;
    min-height: 150px;
    padding: 12px;
  }
  .monogram { font: 700 2rem Georgia, serif; color: var(--green); }
  .portrait-note { font-size: 0.72rem; color: color-mix(in srgb, var(--ink) 58%, transparent); text-align: center; }
  .about-sources { font-size: 0.86rem; color: color-mix(in srgb, var(--ink) 62%, transparent); }

  /* ---- enrol ---- */
  .enrol-form { display: grid; gap: 8px; max-width: 480px; }
  .enrol-label { font-size: 0.85rem; font-weight: 600; margin-block-start: 8px; }
  .enrol-field {
    font: inherit;
    padding: 9px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--card);
    color: inherit;
    min-width: 0;
  }
  .enrol-field.invalid { border-color: #a33a2e; }
  .enrol-error { min-height: 1.2em; font-size: 0.88rem; color: #a33a2e; }
  .enrol-submit {
    justify-self: start;
    font: inherit;
    font-weight: 650;
    padding: 11px 24px;
    border-radius: 999px;
    border: 0;
    background: var(--green);
    color: var(--paper);
    cursor: pointer;
    &:hover { filter: brightness(1.08); }
  }
  .enrol-note { font-size: 0.9rem; color: color-mix(in srgb, var(--ink) 62%, transparent); }

  /* ---- footer ---- */
  .board-foot {
    border-block-start: 3px double var(--line);
    padding: 22px 18px 40px;
    text-align: center;
  }
  .foot-rule { margin: 0 0 6px; font-size: 0.9rem; }
  .foot-note { margin: 0 auto; font-size: 0.8rem; color: color-mix(in srgb, var(--ink) 58%, transparent); max-width: 62ch; }
}