:root {
  --bg: #0f172a;
  --card: #1e293b;
  --card-2: #334155;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #16a34a;
  --warn: #f59e0b;
  --danger: #dc2626;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #475569;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans Thai", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: #93c5fd; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .brand {
  font-weight: 700;
  font-size: 1.1rem;
}
.topbar nav a {
  margin-left: 16px;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
}
.topbar nav a:hover,
.topbar nav a.active {
  background: var(--card-2);
  text-decoration: none;
}
.topbar .btn-logout {
  margin-left: 12px;
  background: var(--danger);
}

/* ---------- Container ---------- */
.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 20px;
}

/* ---------- Card ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
}
.card h2 { margin-top: 0; }

/* ---------- Forms ---------- */
label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}
input, select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
}
button, .btn {
  display: inline-block;
  padding: 10px 18px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  font-family: inherit;
}
button:hover, .btn:hover { background: var(--primary-hover); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-success { background: var(--success); }
.btn-danger { background: var(--danger); }
.btn-warn { background: var(--warn); color: #1f2937; }
.btn-secondary { background: var(--card-2); }

/* ---------- Login ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 380px;
}
.login-box h1 {
  text-align: center;
  margin-top: 0;
  font-size: 1.4rem;
}
.login-box .hint {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 16px;
}

/* ---------- Camera ---------- */
.camera-wrap {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}
video {
  width: 100%;
  border-radius: 8px;
  background: #000;
  display: block;
}
canvas.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: transparent;
}

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 12px 0;
  gap: 10px;
}
.status-bar .pill {
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--card-2);
  font-size: 0.85rem;
}

/* ---------- Tables ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}
th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
th { color: var(--muted); font-weight: 600; }
tr:hover { background: var(--card-2); }

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
}
.tag-present { background: rgba(22,163,74,.2); color: #4ade80; }
.tag-late    { background: rgba(245,158,11,.2); color: #fbbf24; }
.tag-absent  { background: rgba(220,38,38,.2); color: #f87171; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  padding: 12px 18px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  z-index: 100;
  transition: opacity .3s;
  max-width: 340px;
}
.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--danger); }
.toast.warn    { border-left-color: var(--warn); }

/* ---------- Utils ---------- */
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 200px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
  .topbar nav a { margin-left: 6px; padding: 6px 8px; font-size: .85rem; }
}
.muted { color: var(--muted); }
.text-center { text-align: center; }
.mb { margin-bottom: 16px; }
.mt { margin-top: 16px; }
.hidden { display: none !important; }

/* Modal — ใช้ class แทน inline style เพื่อให้ .hidden ทับได้ */
.enroll-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}