:root {
  /* "Aurora" palette — modern indigo / sky / mint gradient theme */
  --bg: #fafaff;
  --surface: #ffffff;
  --surface-2: #eeebfa;
  --primary: #6c63ff;
  --primary-dark: #5147d6;
  --accent: #34c99b;
  --accent-2: #4fa8f0;
  --text: #241f3d;
  --muted: #6b6483;
  --border: #e6e5f5;
  --success: #34c99b;
  --warn: #e0a72e;
  --danger: #e0603f;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(76, 63, 168, 0.1);
  --shadow-sm: 0 4px 14px rgba(76, 63, 168, 0.07);
  --max-w: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1220;
    --surface: #171a2c;
    --surface-2: #1e2238;
    --primary: #8b7cf6;
    --primary-dark: #b4aef7;
    --accent: #3dd9a4;
    --accent-2: #6fa8f0;
    --text: #f1f0fa;
    --muted: #9d97c4;
    --border: #2a2c42;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.32);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Sarabun", "Segoe UI", system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4 {
  font-family: "Prompt", "Sarabun", sans-serif;
  margin: 0 0 0.4em;
  line-height: 1.3;
}

a { color: inherit; }

img, svg { max-width: 100%; }

.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Top nav ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: var(--max-w);
  margin: 0 auto;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Prompt", sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

nav.mainnav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

nav.mainnav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

nav.mainnav a:hover { background: var(--surface-2); color: var(--text); }
nav.mainnav a.active { background: var(--primary); color: #fff; }

/* ---------- Layout helpers ---------- */
main { flex: 1; padding: 32px 0 60px; }

.hero {
  padding: 40px 20px 24px;
  margin: 0 -20px 0;
  border-radius: 28px;
  background:
    radial-gradient(60% 160% at 8% -10%, color-mix(in srgb, var(--primary) 16%, transparent), transparent 65%),
    radial-gradient(50% 140% at 95% 40%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 65%),
    radial-gradient(55% 120% at 50% 120%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent 65%);
}

.hero h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); }
.hero p { color: var(--muted); font-size: 1.05rem; max-width: 60ch; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-2);
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.card .emoji {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.card h3 { margin: 0; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.94rem; }

.card .tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  background: var(--surface-2);
  padding: 3px 10px;
  border-radius: 999px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--accent-2));
  color: #fff;
  transition: filter 0.15s, transform 0.1s;
  text-decoration: none;
}

.btn:hover { filter: brightness(0.93); }
.btn:active { transform: scale(0.97); }
.btn.secondary { background: var(--surface-2); color: var(--text); }
.btn.secondary:hover { background: var(--border); }
.btn.accent { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.block { width: 100%; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

label { font-weight: 600; font-size: 0.9rem; display: block; margin-bottom: 6px; }

input[type="text"], input[type="number"], input[type="url"], textarea, select {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

textarea { resize: vertical; min-height: 90px; }

.field { margin-bottom: 16px; }

.footer {
  border-top: 1px solid var(--border);
  padding: 22px 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}
.badge.low { background: #dcf5e6; color: #1e8a4c; }
.badge.mid { background: #fdecc8; color: #97690a; }
.badge.high { background: #fbdcd4; color: #b7422b; }

@media (prefers-color-scheme: dark) {
  .badge.low { background: #163f2a; color: #7fe0aa; }
  .badge.mid { background: #443a17; color: #f3c869; }
  .badge.high { background: #452420; color: #f3a08c; }
}

.notice {
  background: var(--surface-2);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--muted);
}

.notice.warn { border-left-color: var(--warn); }
.notice.danger { border-left-color: var(--danger); }

hr.sep { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 40px;
}

@media (max-width: 640px) {
  nav.mainnav { width: 100%; justify-content: flex-start; overflow-x: auto; }
  .topbar-inner { flex-wrap: wrap; }
}

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 100;
  background: var(--primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
  top: 0;
  width: auto;
  height: auto;
  outline: 3px solid #fff;
  outline-offset: -3px;
}

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.lang-switch {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-weight: 700;
  font-size: 0.82rem;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
}
.lang-switch:hover { background: var(--border); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}