/* ========================================
   ต้นแบบ v1.0 — Mobile-First · มืด/สว่าง · ฟอนต์ใหญ่
   แยก CSS ออกจาก HTML ทุกหน้า
   ======================================== */

/* --- CSS Variables (โหมดสว่าง — OnTheBridge Theme) --- */
:root {
  --bg: #f5f3ee;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #666;
  --accent: #1b4b7a;
  --accent-hover: #153a5f;
  --accent-text: #ffffff;
  --border: #e0ddd5;
  --shadow: rgba(0,0,0,0.06);
  --danger: #c0392b;
  --warning: #e67e22;
  --safe: #27ae60;
  --info: #2980b9;
  --radius: 12px;
  --tap: 52px;
  --gap: 16px;
  --font-base: 17px;
  --font-lg: 20px;
  --font-xl: 26px;
  --font-sm: 14px;
}

/* --- โหมดมืด (OnTheBridge Dark) --- */
[data-theme="dark"] {
  --bg: #1a1a1a;
  --card: #242424;
  --text: #e8e4db;
  --muted: #999;
  --accent: #4a90c2;
  --accent-hover: #5a9fd2;
  --accent-text: #ffffff;
  --border: #3a3a3a;
  --shadow: rgba(0,0,0,0.2);
}

/* --- Reset + Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: var(--font-base);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Noto Sans Thai", "Sarabun", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
  -webkit-font-smoothing: antialiased;
}

/* --- App Bar --- */
.appbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px var(--shadow);
}

.appbar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: var(--font-lg);
  color: var(--accent);
  letter-spacing: -0.3px;
}

.appbar .brand svg { width: 28px; height: 28px; }

.appbar .actions {
  display: flex;
  gap: 6px;
}

.icon-btn {
  width: var(--tap);
  height: var(--tap);
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1.4rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.theme-btn {
  width: auto !important;
  min-width: 80px;
  padding: 0 12px !important;
  border-radius: var(--radius) !important;
  gap: 6px;
}

.theme-icon {
  font-size: 1.2rem;
}

.theme-label {
  font-size: 0.95rem;
  font-weight: 600;
}

.icon-btn:active { background: var(--border); }

/* --- Main Content --- */
main {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--gap);
}

/* --- Cards --- */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: var(--gap);
  box-shadow: 0 2px 8px var(--shadow);
  border: 1px solid var(--border);
}

.card h2 {
  font-size: var(--font-lg);
  margin-bottom: 8px;
  color: var(--accent);
}

.card p {
  color: var(--muted);
  font-size: var(--font-base);
  margin-bottom: 12px;
}

/* --- Big Buttons (ปุ่มยักษ์) --- */
.bigbtn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  min-height: var(--tap);
  padding: 14px 20px;
  font-size: var(--font-lg);
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--accent);
  color: var(--accent-text);
  transition: transform 0.1s, opacity 0.2s;
  margin-bottom: 10px;
}

.bigbtn:active { transform: scale(0.97); }

.bigbtn.secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.bigbtn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.bigbtn.danger {
  background: var(--danger);
}

.bigbtn svg { width: 24px; height: 24px; }

/* --- Button Grid (2 คอลัมน์) --- */
.btn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: var(--gap);
}

.btn-grid .bigbtn {
  margin-bottom: 0;
  font-size: var(--font-base);
  min-height: 80px;
  flex-direction: column;
  gap: 6px;
}

/* --- Textarea --- */
textarea {
  width: 100%;
  min-height: 120px;
  padding: 14px;
  font-size: var(--font-base);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  resize: vertical;
  font-family: inherit;
  margin-bottom: 12px;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* --- Verdict Box --- */
.verdict {
  border-radius: var(--radius);
  padding: 20px;
  margin-top: var(--gap);
  border-left: 6px solid var(--info);
  background: var(--card);
}

.verdict.match { border-left-color: var(--danger); }
.verdict.partial { border-left-color: var(--warning); }
.verdict.unknown { border-left-color: var(--info); }
.verdict.clean { border-left-color: var(--safe); }
.verdict.not-suspicious { border-left-color: var(--safe); }

.verdict .tag {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--font-lg);
  font-weight: 700;
  margin-bottom: 8px;
}

.verdict .icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  background: var(--info);
}

.verdict.match .icon { background: var(--danger); }
.verdict.partial .icon { background: var(--warning); }
.verdict.unknown .icon { background: var(--info); }
.verdict.clean .icon { background: var(--safe); }
.verdict.not-suspicious .icon { background: var(--safe); }

.verdict .why {
  font-size: var(--font-base);
  color: var(--muted);
  line-height: 1.6;
}

/* --- Hint Text --- */
.hint {
  font-size: var(--font-sm);
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
}

/* --- Footer Nav --- */
.foot-nav {
  text-align: center;
  padding: 16px;
  font-size: var(--font-sm);
}

.foot-nav a {
  color: var(--accent);
  text-decoration: none;
  margin: 0 10px;
}

/* --- QR Area --- */
.qr-area {
  margin-top: var(--gap);
  text-align: center;
}

.qr-area video {
  width: 100%;
  max-width: 320px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  margin-bottom: 12px;
}

.qr-area .hint { margin-bottom: 12px; }

/* --- Theme Toggle --- */
#theme-toggle[data-theme="dark"]::after {
  content: "☀️";
}

#theme-toggle[data-theme="light"]::after {
  content: "🌙";
}

/* --- Responsive (จอใหญ่กว่ามือถือ) --- */
@media (min-width: 600px) {
  :root {
    --font-base: 17px;
    --font-lg: 20px;
    --font-xl: 26px;
  }
  .btn-grid .bigbtn { min-height: 100px; }
}

/* --- Animation --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.verdict { animation: fadeIn 0.3s ease; }

/* --- Accessibility: Focus Visible --- */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* --- Print (ไม่ใช้แต่เผื่อ) --- */
@media print {
  .appbar, .icon-btn, .bigbtn.secondary, .bigbtn.ghost { display: none; }
  body { background: #fff; color: #000; }
}