/* =====================================================================
   Roll Call — design system (navy / charcoal + champagne gold)
   ===================================================================== */

@font-face { font-family: "Prompt"; font-weight: 300; font-display: swap; src: url(../fonts/prompt-thai-300-normal.woff2) format("woff2"); unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC; }
@font-face { font-family: "Prompt"; font-weight: 400; font-display: swap; src: url(../fonts/prompt-thai-400-normal.woff2) format("woff2"); unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC; }
@font-face { font-family: "Prompt"; font-weight: 500; font-display: swap; src: url(../fonts/prompt-thai-500-normal.woff2) format("woff2"); unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC; }
@font-face { font-family: "Prompt"; font-weight: 600; font-display: swap; src: url(../fonts/prompt-thai-600-normal.woff2) format("woff2"); unicode-range: U+0E01-0E5B, U+200C-200D, U+25CC; }
@font-face { font-family: "Prompt"; font-weight: 300; font-display: swap; src: url(../fonts/prompt-latin-300-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F, U+20AC, U+2122; }
@font-face { font-family: "Prompt"; font-weight: 400; font-display: swap; src: url(../fonts/prompt-latin-400-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F, U+20AC, U+2122; }
@font-face { font-family: "Prompt"; font-weight: 500; font-display: swap; src: url(../fonts/prompt-latin-500-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F, U+20AC, U+2122; }
@font-face { font-family: "Prompt"; font-weight: 600; font-display: swap; src: url(../fonts/prompt-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F, U+20AC, U+2122; }
@font-face { font-family: "Noto Serif Thai"; font-weight: 500; font-display: swap; src: url(../fonts/noto-serif-thai-thai-500-normal.woff2) format("woff2"); }
@font-face { font-family: "Noto Serif Thai"; font-weight: 700; font-display: swap; src: url(../fonts/noto-serif-thai-thai-700-normal.woff2) format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-weight: 500; font-display: swap; src: url(../fonts/cormorant-garamond-latin-500-normal.woff2) format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-weight: 600; font-display: swap; src: url(../fonts/cormorant-garamond-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-weight: 500; font-style: italic; font-display: swap; src: url(../fonts/cormorant-garamond-latin-500-italic.woff2) format("woff2"); }

:root {
  --font-body: "Prompt", "Leelawadee UI", "Segoe UI", system-ui, sans-serif;
  --font-display: "Cormorant Garamond", "Noto Serif Thai", Georgia, serif;
  --radius: 18px;
  --radius-sm: 12px;
  --ease: cubic-bezier(.2, .8, .2, 1);

  /* dark (default) */
  --bg: #0a111e;
  --bg-2: #101a2c;
  --glow: rgba(201, 169, 110, .13);
  --surface: rgba(22, 34, 56, .62);
  --surface-2: rgba(30, 45, 72, .55);
  --surface-solid: #142036;
  --border: rgba(201, 169, 110, .16);
  --border-strong: rgba(201, 169, 110, .38);
  --text: #ede7db;
  --muted: #98a3b6;
  --gold: #c9a96e;
  --gold-2: #e8d3a4;
  --gold-ink: #1a1408;
  --shadow: 0 18px 50px -18px rgba(0, 0, 0, .65), 0 2px 8px rgba(0, 0, 0, .25);
  --ok: #57c08f;
  --warn: #e5ad48;
  --bad: #e46b6b;
  --info: #7aa7dc;
  --ok-bg: rgba(87, 192, 143, .14);
  --warn-bg: rgba(229, 173, 72, .15);
  --bad-bg: rgba(228, 107, 107, .15);
  --info-bg: rgba(122, 167, 220, .14);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f5f0e6;
  --bg-2: #ebe2d1;
  --glow: rgba(176, 138, 72, .16);
  --surface: rgba(255, 255, 255, .72);
  --surface-2: rgba(255, 252, 245, .85);
  --surface-solid: #fffdf8;
  --border: rgba(140, 108, 52, .16);
  --border-strong: rgba(140, 108, 52, .4);
  --text: #18233a;
  --muted: #69707f;
  --gold: #a5813f;
  --gold-2: #c9a96e;
  --gold-ink: #fffaf0;
  --shadow: 0 18px 44px -20px rgba(60, 45, 20, .35), 0 2px 6px rgba(60, 45, 20, .08);
  --ok: #2f9a68;
  --warn: #b97d12;
  --bad: #c84848;
  --info: #3d74b5;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text);
  background:
    radial-gradient(1100px 600px at 85% -10%, var(--glow), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, var(--glow), transparent 60%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gold); text-decoration: none; }
h1, h2, h3, .display { font-family: var(--font-display); font-weight: 600; letter-spacing: .01em; margin: 0; }
h1 { font-size: clamp(2rem, 3.4vw, 2.9rem); line-height: 1.15; }
h2 { font-size: 1.65rem; }
h3 { font-size: 1.25rem; }
.muted { color: var(--muted); }
.small { font-size: .86rem; }
.gold { color: var(--gold); }
.hidden { display: none !important; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.grow { flex: 1; }
.center { text-align: center; }

/* ---------------------------------------------------------------- nav */
.nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner { max-width: 1320px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--gold-2), var(--gold));
  color: var(--gold-ink); box-shadow: 0 6px 18px -6px var(--gold);
}
.brand-name { font-family: var(--font-display); font-size: 1.45rem; font-weight: 600; letter-spacing: .02em; }
.brand-name em { color: var(--gold); font-style: italic; }
.nav-links { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav-links a {
  color: var(--muted); padding: 8px 14px; border-radius: 999px; font-size: .95rem; transition: all .25s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--surface-2); }
.icon-btn {
  width: 40px; height: 40px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); display: grid; place-items: center; cursor: pointer; transition: all .25s var(--ease);
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--gold); }

.container { max-width: 1320px; margin: 0 auto; padding: 30px 24px 70px; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin: 10px 0 28px; }
.eyebrow { text-transform: uppercase; letter-spacing: .22em; font-size: .72rem; color: var(--gold); font-weight: 500; margin-bottom: 8px; }
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border-strong), transparent); margin: 22px 0; border: 0; }

/* ---------------------------------------------------------------- cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 22px;
}
.card.hover { transition: transform .35s var(--ease), border-color .35s var(--ease); }
.card.hover:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.grid { display: grid; gap: 20px; }
.grid.cols-3 { grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat b { font-family: var(--font-display); font-size: 2.1rem; font-weight: 600; line-height: 1; }
.stat span { color: var(--muted); font-size: .84rem; }
.stats { display: flex; gap: 30px; flex-wrap: wrap; }

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 500 .95rem var(--font-body); padding: 10px 20px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border-strong); background: transparent; color: var(--text);
  transition: transform .2s var(--ease), background .25s var(--ease), border-color .25s, box-shadow .25s;
  white-space: nowrap;
}
.btn:hover { border-color: var(--gold); color: var(--gold); }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.gold {
  background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: var(--gold-ink); border-color: transparent;
  box-shadow: 0 10px 24px -12px var(--gold);
}
.btn.gold:hover { color: var(--gold-ink); box-shadow: 0 14px 30px -12px var(--gold); filter: brightness(1.05); }
.btn.ghost { border-color: transparent; color: var(--muted); }
.btn.ghost:hover { color: var(--text); background: var(--surface-2); }
.btn.danger { border-color: color-mix(in srgb, var(--bad) 50%, transparent); color: var(--bad); }
.btn.danger:hover { background: var(--bad-bg); color: var(--bad); }
.btn.ok { border-color: color-mix(in srgb, var(--ok) 50%, transparent); color: var(--ok); }
.btn.ok:hover { background: var(--ok-bg); }
.btn.sm { padding: 6px 13px; font-size: .85rem; }
.btn.lg { padding: 13px 28px; font-size: 1.05rem; }
.btn svg, .icon-btn svg { width: 18px; height: 18px; }

/* ---------------------------------------------------------------- badges */
.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 999px;
  font-size: .76rem; font-weight: 500; border: 1px solid transparent; white-space: nowrap;
}
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badge.info { background: var(--info-bg); color: var(--info); }
.badge.gold { background: color-mix(in srgb, var(--gold) 16%, transparent); color: var(--gold); }
.badge.line { border-color: var(--border-strong); color: var(--muted); }

/* ---------------------------------------------------------------- forms */
label.field { display: flex; flex-direction: column; gap: 6px; font-size: .88rem; color: var(--muted); }
.input, select.input, textarea.input {
  font: 400 .97rem var(--font-body); color: var(--text); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 14px; outline: none;
  transition: border-color .2s, box-shadow .2s; width: 100%;
}
.input:focus { border-color: var(--gold); box-shadow: 0 0 0 3px color-mix(in srgb, var(--gold) 20%, transparent); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .9rem; cursor: pointer; }
.check input { accent-color: var(--gold); width: 18px; height: 18px; margin-top: 2px; flex: none; }
input[type="range"] { accent-color: var(--gold); width: 100%; }

/* ---------------------------------------------------------------- modal */
.modal-back {
  position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 20px;
  background: rgba(5, 9, 18, .62); backdrop-filter: blur(6px); animation: fade .25s var(--ease);
}
.modal {
  width: min(620px, 100%); max-height: 90vh; overflow: auto;
  background: var(--surface-solid); border: 1px solid var(--border-strong); border-radius: 22px;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, .7); padding: 28px; animation: rise .35s var(--ease);
}
.modal.wide { width: min(980px, 100%); }
.modal-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(14px) scale(.985); } }

/* ---------------------------------------------------------------- toast */
.toasts { position: fixed; right: 22px; bottom: 22px; z-index: 200; display: flex; flex-direction: column; gap: 10px; }
.toast {
  min-width: 260px; max-width: 380px; padding: 13px 18px; border-radius: 14px; background: var(--surface-solid);
  border: 1px solid var(--border-strong); box-shadow: var(--shadow); animation: rise .3s var(--ease);
  display: flex; gap: 10px; align-items: center; font-size: .93rem;
}
.toast.ok { border-left: 4px solid var(--ok); }
.toast.bad { border-left: 4px solid var(--bad); }
.toast.warn { border-left: 4px solid var(--warn); }

/* ---------------------------------------------------------------- tabs */
.tabs { display: inline-flex; gap: 4px; padding: 5px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); }
.tabs button {
  font: 500 .93rem var(--font-body); border: 0; background: transparent; color: var(--muted);
  padding: 8px 18px; border-radius: 999px; cursor: pointer; transition: all .25s var(--ease);
}
.tabs button.active { background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: var(--gold-ink); }

/* ---------------------------------------------------------------- section cards (home) */
.class-card { display: flex; flex-direction: column; gap: 16px; position: relative; overflow: hidden; cursor: pointer; }
.class-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent); opacity: .7;
}
.class-card .code { font-size: .78rem; letter-spacing: .18em; text-transform: uppercase; color: var(--gold); }
.class-card h3 { font-size: 1.5rem; }
.class-meta { display: flex; gap: 18px; color: var(--muted); font-size: .86rem; flex-wrap: wrap; }
.empty {
  text-align: center; padding: 60px 20px; border: 1px dashed var(--border-strong); border-radius: var(--radius);
  color: var(--muted);
}

/* ---------------------------------------------------------------- students */
.student-card { display: flex; flex-direction: column; gap: 12px; padding: 18px; position: relative; transition: border-color .25s, background .25s; }
.student-card.drag { border-color: var(--gold); background: color-mix(in srgb, var(--gold) 9%, var(--surface)); }
.student-card .name { font-weight: 500; font-size: 1.05rem; }
.photos { display: flex; gap: 8px; flex-wrap: wrap; }
.thumb { position: relative; width: 62px; height: 62px; border-radius: 12px; overflow: hidden; border: 1px solid var(--border); flex: none; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .x {
  position: absolute; top: 3px; right: 3px; width: 20px; height: 20px; border-radius: 999px; border: 0; cursor: pointer;
  background: rgba(0, 0, 0, .6); color: #fff; font-size: 12px; display: none; place-items: center;
}
.thumb:hover .x { display: grid; }
.thumb.warn { border: 2px solid var(--warn); }
.thumb .dot { position: absolute; bottom: 3px; left: 3px; width: 9px; height: 9px; border-radius: 99px; background: var(--warn); }
.thumb.add {
  display: grid; place-items: center; border-style: dashed; border-color: var(--border-strong); color: var(--gold);
  cursor: pointer; font-size: 1.5rem; background: transparent;
}
.avatar { width: 46px; height: 46px; border-radius: 13px; object-fit: cover; border: 1px solid var(--border); flex: none; background: var(--surface-2); }
.avatar.lg { width: 92px; height: 92px; border-radius: 18px; }

.dropzone {
  border: 1.5px dashed var(--border-strong); border-radius: var(--radius); padding: 34px; text-align: center; color: var(--muted);
  transition: all .25s var(--ease); cursor: pointer;
}
.dropzone.drag, .dropzone:hover { border-color: var(--gold); color: var(--text); background: color-mix(in srgb, var(--gold) 7%, transparent); }

.list { display: flex; flex-direction: column; gap: 8px; }
.list-item { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 14px; background: var(--surface-2); border: 1px solid transparent; }

table.table { width: 100%; border-collapse: collapse; font-size: .93rem; }
.table th { text-align: left; font-weight: 500; color: var(--muted); font-size: .8rem; letter-spacing: .06em; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table-wrap { overflow-x: auto; }

/* ---------------------------------------------------------------- similarity */
.heatmap { display: grid; gap: 2px; font-size: .7rem; overflow: auto; }
.heatmap .cell { aspect-ratio: 1; border-radius: 4px; display: grid; place-items: center; color: #fff; min-width: 26px; cursor: default; }
.heatmap .lbl { color: var(--muted); font-size: .72rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: flex; align-items: center; }
.heatmap .col-lbl { writing-mode: vertical-rl; transform: rotate(180deg); justify-content: flex-start; padding-bottom: 4px; height: 90px; }
.pair { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center; }
.pair .side { display: flex; flex-direction: column; gap: 8px; align-items: center; text-align: center; }
.pair .score { font-family: var(--font-display); font-size: 2rem; color: var(--gold); text-align: center; line-height: 1; }

/* ---------------------------------------------------------------- live page */
.live-layout { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 22px; align-items: start; }
.stage {
  position: relative; border-radius: 22px; overflow: hidden; background: #05080f; border: 1px solid var(--border-strong);
  box-shadow: var(--shadow); aspect-ratio: 16 / 9;
}
.stage video, .stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.stage.mirror video { transform: scaleX(-1); }   /* boxes are mirrored in JS so text stays readable */
.stage-placeholder { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; color: #a9b2c3; padding: 20px; }
.stage-top { position: absolute; top: 14px; left: 14px; right: 14px; display: flex; justify-content: space-between; gap: 10px; pointer-events: none; }
.pill {
  pointer-events: auto; display: inline-flex; gap: 8px; align-items: center; padding: 7px 14px; border-radius: 999px;
  background: rgba(8, 13, 24, .62); backdrop-filter: blur(10px); color: #f2ebdc; font-size: .85rem; border: 1px solid rgba(201, 169, 110, .25);
}
.rec { width: 9px; height: 9px; border-radius: 99px; background: #e46b6b; box-shadow: 0 0 0 0 rgba(228, 107, 107, .6); animation: pulse 1.6s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 9px rgba(228, 107, 107, 0); } 100% { box-shadow: 0 0 0 0 rgba(228, 107, 107, 0); } }
.feed { position: absolute; left: 14px; bottom: 14px; display: flex; flex-direction: column-reverse; gap: 8px; max-width: 70%; }
.feed .pill { animation: rise .35s var(--ease); }
.clock { font-family: var(--font-display); font-size: 2.4rem; line-height: 1; }
.roster-panel { position: sticky; top: 86px; display: flex; flex-direction: column; gap: 14px; max-height: calc(100vh - 110px); }
.roster-list { overflow: auto; display: flex; flex-direction: column; gap: 7px; padding-right: 4px; }
.roster-item { display: flex; align-items: center; gap: 11px; padding: 9px 11px; border-radius: 14px; background: var(--surface-2); border: 1px solid transparent; transition: all .3s var(--ease); }
.roster-item.new { border-color: var(--gold); box-shadow: 0 0 0 3px color-mix(in srgb, var(--gold) 18%, transparent); }
.roster-item .who { flex: 1; min-width: 0; }
.roster-item .who div { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.counts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.count { text-align: center; padding: 10px 6px; border-radius: 14px; background: var(--surface-2); }
.count b { display: block; font-family: var(--font-display); font-size: 1.8rem; line-height: 1.1; }
.count span { font-size: .78rem; color: var(--muted); }
.count.ok b { color: var(--ok); } .count.warn b { color: var(--warn); } .count.bad b { color: var(--bad); }

.verify-grid { display: grid; grid-template-columns: 220px 1fr; gap: 22px; }
.verify-live img { width: 100%; border-radius: 16px; border: 2px solid var(--gold); }
.cand { display: flex; gap: 12px; align-items: center; padding: 12px; border-radius: 16px; background: var(--surface-2); border: 1px solid var(--border); cursor: pointer; transition: all .2s var(--ease); }
.cand:hover { border-color: var(--gold); transform: translateX(3px); }
.cand .imgs { display: flex; gap: 5px; }
.cand .imgs img { width: 58px; height: 58px; border-radius: 10px; object-fit: cover; }

.evidence { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.evidence figure { margin: 0; background: var(--surface-2); border-radius: 14px; overflow: hidden; border: 1px solid var(--border); }
.evidence img { width: 100%; aspect-ratio: 1; object-fit: cover; display: block; }
.evidence figcaption { padding: 8px 10px; font-size: .8rem; display: flex; flex-direction: column; gap: 6px; }

.setting { display: grid; grid-template-columns: 1fr 200px; gap: 18px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--border); }
.setting:last-child { border-bottom: 0; }
.setting .help { font-size: .82rem; color: var(--muted); }
.setting .changed { color: var(--gold); font-size: .75rem; }

.spinner { width: 18px; height: 18px; border-radius: 99px; border: 2px solid var(--border-strong); border-top-color: var(--gold); animation: spin .8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.fade-in { animation: rise .45s var(--ease) both; }

/* ---------------------------------------------------------------- responsive (tablet) */
@media (max-width: 1100px) {
  .live-layout { grid-template-columns: 1fr; }
  .roster-panel { position: static; max-height: none; }
  .roster-list { max-height: 460px; }
}
@media (max-width: 720px) {
  .container { padding: 18px 14px 60px; }
  .nav-inner { padding: 12px 14px; gap: 10px; }
  .brand-name { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .verify-grid { grid-template-columns: 1fr; }
  .setting { grid-template-columns: 1fr; }
  .pair { grid-template-columns: 1fr; }
}