:root {
  /* Common Palette */
  --primary: #6366f1;
  /* Indigo 500 */
  --primary-hover: #4f46e5;
  /* Indigo 600 */
  --primary-soft: rgba(99, 102, 241, 0.1);
  --success: #10b981;
  /* Emerald 500 */
  --success-bg: rgba(16, 185, 129, 0.1);
  --danger: #ef4444;
  /* Red 500 */
  --danger-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  /* Amber 500 */
  --warning-bg: rgba(245, 158, 11, 0.1);
  --info: #3b82f6;
  /* Blue 500 */
  --info-bg: rgba(59, 130, 246, 0.1);

  /* Light Theme (Default) */
  --bg-main: #f8fafc;
  /* Slate 50 */
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.8);
  --border: #e2e8f0;
  /* Slate 200 */
  --border-hover: #cbd5e1;
  /* Slate 300 */
  --text-main: #0f172a;
  /* Slate 900 */
  --text-muted: #64748b;
  /* Slate 500 */
  --text-inverse: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --radius: 12px;
}

[data-theme="dark"] {
  --bg-main: #0f172a;
  /* Slate 900 */
  --bg-card: #1e293b;
  /* Slate 800 */
  --bg-input: #0f172a;
  /* Slate 900 */
  --bg-header: rgba(15, 23, 42, 0.8);
  --border: #334155;
  /* Slate 700 */
  --border-hover: #475569;
  /* Slate 600 */
  --text-main: #f1f5f9;
  /* Slate 100 */
  --text-muted: #94a3b8;
  /* Slate 400 */
  --text-inverse: #0f172a;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.3);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans TC", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  transition: background-color 0.3s, color 0.3s;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.container {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
}

/* Header */
.topbar {
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  transition: background-color 0.3s, border-color 0.3s;
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand__link {
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.025em;
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav__link {
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.925rem;
}

.nav__link:hover {
  color: var(--text-main);
  background-color: var(--bg-card);
  /* slight bg on hover */
}

.nav__cta {
  background-color: var(--primary);
  color: white !important;
  box-shadow: var(--shadow-sm);
}

.nav__cta:hover {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow);
}

.nav__form {
  display: inline;
  margin: 0;
}

.nav__form .nav__link {
  background: transparent;
  cursor: pointer;
  font: inherit;
  border: none;
}

/* Theme Toggle Button */
.theme-toggle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background-color: var(--border);
  color: var(--text-main);
}

/* Footer */
.footer {
  margin-top: 80px;
  border-top: 1px solid var(--border);
  background-color: var(--bg-card);
  padding: 32px 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
}

/* Typography & Layout */
h1 {
  margin: 32px 0 16px;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-main);
}

h2 {
  margin: 24px 0 16px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.hero {
  padding: 64px 0 32px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--primary) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}

.lead {
  color: var(--text-muted);
  max-width: 60ch;
  margin: 0 auto 32px;
  font-size: 1.125rem;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.section {
  padding: 40px 0;
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
}

.muted {
  color: var(--text-muted);
}

.spacer {
  height: 24px;
}

.prose {
  white-space: pre-wrap;
  color: var(--text-muted);
}

/* Grid & Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--border-hover);
}

.card__body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card__title {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 4px;
  color: var(--text-main);
}

.card__meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: auto;
  /* Push price to bottom */
}

.card__price {
  margin-top: 12px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
}

.card__price-row {
  margin-top: 12px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.card__price-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.card__price-original {
  font-weight: 600;
  font-size: 1rem;
  /* original price is regular text color, maybe strike-through if strictly list price? user just said "mark original price" */
  color: var(--text-main);
  text-decoration: line-through;
  /* Common pattern for list price vs discount */
}

/* User asked to show Original Price. Usually we show it crossed out if there's a discount, 
   but here the discount is HIDDEN until click. So maybe NOT crossed out? 
   "mark original price outside" -> "建議售價 $10,000". 
   Crossed out implies "This is old price". 
   I will make it Normal text for now, maybe slightly muted. */
.card__price-original {
  text-decoration: none;
  color: var(--text-main);
}

.card__price-cue {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--danger);
  /* Using danger/red color to attract attention to "Discount avail" */
  margin-top: 4px;
}

.thumb {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--bg-main);
  border-bottom: 1px solid var(--border);
}

.heroimg {
  width: 100%;
  max-height: 500px;
  object-fit: contain;
  border-radius: var(--radius);
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  margin: 24px 0;
}

/* Pills (Brands) */
.pills {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.pill {
  padding: 8px 16px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background-color: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s;
}

.pill:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--bg-main);
}

.pill--active {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Brands Grid */
.card--brand {
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px;
}

.brand-logo {
  max-width: 120px;
  height: 60px;
  object-fit: contain;
  margin-bottom: 16px;
  filter: grayscale(1) opacity(0.7);
  transition: all 0.3s;
}

.card--brand:hover .brand-logo {
  filter: grayscale(0) opacity(1);
  transform: scale(1.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.925rem;
  border: 1px solid var(--border);
  background-color: var(--bg-card);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background-color: var(--bg-main);
  border-color: var(--border-hover);
}

.btn--primary {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--shadow);
}

.link {
  color: var(--primary);
  font-weight: 500;
}

.link:hover {
  text-decoration: underline;
  color: var(--primary-hover);
}

/* Forms */
.form {
  display: grid;
  gap: 24px;
}

.form__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.field {
  display: block;
}

.field__label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 8px;
}

.input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background-color: var(--bg-input);
  color: var(--text-main);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

/* Tables & Panels */
.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background-color: var(--bg-card);
}

.kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 8px 16px;
  align-items: baseline;
}

.kv__k {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.kv__v {
  font-weight: 500;
}

.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  /* to clip borders */
}

.table th {
  background-color: var(--bg-main);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
}

.table tr:last-child td {
  border-bottom: none;
}

/* Badges */
.badge {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge--gray {
  background: var(--bg-main);
  color: var(--text-muted);
  border-color: var(--border);
}

.badge--red {
  background: var(--danger-bg);
  color: var(--danger);
}

.badge--green {
  background: var(--success-bg);
  color: var(--success);
}

.badge--blue {
  background: var(--info-bg);
  color: var(--info);
}

.badge--purple {
  background: rgba(168, 85, 247, 0.1);
  color: #a855f7;
}

/* Option Row (Form) */
.option-row {
  display: grid;
  grid-template-columns: 3fr 2fr 100px;
  gap: 16px;
  align-items: start;
  padding: 16px;
  background-color: var(--bg-main);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.price-inline {
  padding: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.price-inline__list {
  font-size: 0.8rem;
  text-decoration: line-through;
  color: var(--text-muted);
}

.price-inline__disc {
  font-weight: 700;
  color: var(--danger);
}

.price-inline__empty {
  color: var(--text-muted);
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .kv {
    grid-template-columns: 100px 1fr;
  }

  .option-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .form__grid {
    grid-template-columns: 1fr;
  }
}

/* Tom Select Integration */
.ts-control {
  border-radius: 8px !important;
  border: 1px solid var(--border) !important;
  background-color: var(--bg-input) !important;
  color: var(--text-main) !important;
  padding: 10px 12px !important;
  font-size: 1rem !important;
  box-shadow: none !important;
}

.ts-control:focus,
.ts-wrapper.focus .ts-control {
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px var(--primary-soft) !important;
}

.ts-dropdown {
  border-radius: 8px !important;
  border: 1px solid var(--border) !important;
  background-color: var(--bg-card) !important;
  color: var(--text-main) !important;
  box-shadow: var(--shadow) !important;
  overflow: hidden !important;
  margin-top: 4px !important;
}

.ts-dropdown .option {
  padding: 8px 12px !important;
  cursor: pointer;
}

.ts-dropdown .option.active {
  background-color: var(--primary-soft) !important;
  color: var(--primary) !important;
}