@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700;900&family=Outfit:wght@400;600;700;900&display=swap');

/* ── CSS Variables ─────────────────────────────────────── */
:root {
  --bg:        #0d0d0d;
  --bg2:       #141414;
  --bg3:       #1e1e1e;
  --card:      #1c1c1c;
  --border:    #2a2a2a;
  --primary:   #ff6b35;
  --primary2:  #ff8c42;
  --accent:    #ffd166;
  --danger:    #ef4444;
  --success:   #22c55e;
  --warning:   #f59e0b;
  --text:      #f0f0f0;
  --text2:     #a0a0a0;
  --text3:     #606060;
  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 4px 24px rgba(0,0,0,.4);
  --font:      'Noto Sans TC', 'Outfit', sans-serif;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary2); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: var(--font); }
input, textarea, select { font-family: var(--font); }

/* ── Layout ─────────────────────────────────────────────── */
.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 480px; margin: 0 auto; padding: 0 20px; }

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(13,13,13,.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--text);
}
.navbar-brand .emoji { font-size: 1.8rem; }
.navbar-brand .highlight { color: var(--primary); }
.navbar-links { display: flex; gap: 12px; align-items: center; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  border: none;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: #fff;
  box-shadow: 0 4px 15px rgba(255,107,53,.35);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(255,107,53,.55); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg3); border-color: var(--primary); color: var(--primary); }
.btn-danger {
  background: linear-gradient(135deg, var(--danger), #c53030);
  color: #fff;
  box-shadow: 0 4px 15px rgba(239,68,68,.3);
}
.btn-danger:hover { box-shadow: 0 6px 20px rgba(239,68,68,.5); }
.btn-success {
  background: linear-gradient(135deg, var(--success), #16a34a);
  color: #fff;
  box-shadow: 0 4px 15px rgba(34,197,94,.3);
}
.btn-warning {
  background: linear-gradient(135deg, var(--warning), #d97706);
  color: #fff;
}
.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  border-radius: 16px;
}
.btn-xl {
  padding: 20px 48px;
  font-size: 1.3rem;
  border-radius: 20px;
}
.btn-sm {
  padding: 6px 14px;
  font-size: .85rem;
}
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; }

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.card-sm { padding: 20px; }

/* ── Form elements ──────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 8px;
  letter-spacing: .03em;
}
.form-control {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
  font-size: .95rem;
  transition: border-color .2s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,107,53,.15);
}
textarea.form-control { resize: vertical; min-height: 100px; }

/* ── Toggle switch ───────────────────────────────────────── */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.toggle-row:last-child { border-bottom: none; }
.toggle-label { font-weight: 600; font-size: .95rem; }
.toggle-desc { font-size: .8rem; color: var(--text2); margin-top: 2px; }
.toggle {
  position: relative;
  width: 52px;
  height: 28px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 28px;
  transition: .3s;
  cursor: pointer;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px; height: 20px;
  left: 3px; bottom: 3px;
  background: var(--text2);
  border-radius: 50%;
  transition: .3s;
}
.toggle input:checked + .toggle-slider { background: var(--primary); border-color: var(--primary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(24px); background: #fff; }

/* ── Badge ───────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: .75rem;
  font-weight: 700;
}
.badge-primary { background: rgba(255,107,53,.2); color: var(--primary); }
.badge-success { background: rgba(34,197,94,.2); color: var(--success); }
.badge-danger  { background: rgba(239,68,68,.2); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,.2); color: var(--warning); }

/* ── Alert ───────────────────────────────────────────────── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  margin-bottom: 16px;
  display: none;
}
.alert.show { display: block; }
.alert-error   { background: rgba(239,68,68,.15); border: 1px solid rgba(239,68,68,.3); color: #fca5a5; }
.alert-success { background: rgba(34,197,94,.15); border: 1px solid rgba(34,197,94,.3); color: #86efac; }
.alert-info    { background: rgba(255,107,53,.1); border: 1px solid rgba(255,107,53,.3); color: #fdba74; }

/* ── Number display ──────────────────────────────────────── */
.number-display {
  font-family: 'Outfit', sans-serif;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Pulse animation ─────────────────────────────────────── */
@keyframes pulse-ring {
  0%   { transform: scale(.8); opacity: .8; }
  50%  { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(.8); opacity: .8; }
}
@keyframes pop-in {
  0%   { transform: scale(.5); opacity: 0; }
  70%  { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
@keyframes fade-slide-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-pop   { animation: pop-in .4s cubic-bezier(.34,1.56,.64,1) both; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-fade  { animation: fade-slide-up .5s ease both; }

/* ── Spinner ─────────────────────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Section title ───────────────────────────────────────── */
.section-title {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 12px;
}

/* ── Divider ─────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

/* ── Waiting chips ───────────────────────────────────────── */
.waiting-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.waiting-chip {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: .9rem;
  font-weight: 600;
  font-family: 'Outfit', sans-serif;
  color: var(--text2);
  transition: .2s;
}
.waiting-chip.next { border-color: var(--primary); color: var(--primary); background: rgba(255,107,53,.1); }

/* ── QR container ────────────────────────────────────────── */
.qr-container {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  display: inline-block;
}

/* ── Gradient background ─────────────────────────────────── */
.gradient-bg {
  background: radial-gradient(ellipse at 20% 0%, rgba(255,107,53,.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(255,209,102,.08) 0%, transparent 60%),
              var(--bg);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
  .card { padding: 18px; }
  .btn-xl { padding: 16px 32px; font-size: 1.1rem; }
  .hide-mobile { display: none !important; }
}