/* ============================================
   common.css — Shared design tokens / base UI
   ============================================ */

@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@500;600;700;800&family=Noto+Sans+TC:wght@400;500;700&display=swap");

:root {
  --ui-bg: #f4f5f8;
  --ui-bg-soft: #eef0f4;
  --ui-card: #ffffff;
  --ui-card-strong: #fdfdff;
  --ui-text: #1f2937;
  --ui-text-subtle: #6b7280;
  --ui-border: #d9dee8;
  --ui-border-strong: #c7d0dd;
  --ui-primary: #334155;
  --ui-primary-strong: #1e293b;
  --ui-primary-soft: #e2e8f0;
  --ui-accent: #0f766e;
  --ui-danger: #b42318;
  --ui-shadow: rgba(15, 23, 42, 0.08);

  --primary: var(--ui-primary);
  --primary-light: var(--ui-primary-strong);
  --secondary: #64748b;
  --accent: var(--ui-accent);
  --bg-light: var(--ui-bg);
  --bg-card: var(--ui-card);
  --surface-border: var(--ui-border);
  --surface-shadow: var(--ui-shadow);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans TC", "Manrope", sans-serif;
  color: var(--ui-text);
  background:
    radial-gradient(circle at 12% 10%, rgba(255, 255, 255, 0.75), transparent 36%),
    radial-gradient(circle at 88% 20%, rgba(255, 255, 255, 0.66), transparent 42%),
    linear-gradient(160deg, #f3f5f9 0%, #eceff5 45%, #e6ebf3 100%);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: "Manrope", "Noto Sans TC", sans-serif;
  letter-spacing: 0.01em;
}

.ui-card,
.glass-card {
  background: linear-gradient(165deg, var(--ui-card-strong), var(--ui-card));
  border: 1px solid var(--ui-border);
  border-radius: 18px;
  box-shadow:
    0 18px 40px -32px rgba(15, 23, 42, 0.45),
    0 4px 14px -10px rgba(15, 23, 42, 0.3);
}

.ui-card-section {
  border: 1px solid var(--ui-border);
  border-radius: 14px;
  background: #fff;
  padding: 1rem;
}

.ui-input,
.input-field {
  width: 100%;
  border: 1px solid var(--ui-border-strong);
  border-radius: 12px;
  background: #fff;
  color: var(--ui-text);
  padding: 0.62rem 0.82rem;
  font-size: 0.925rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ui-input:focus,
.input-field:focus {
  outline: none;
  border-color: #94a3b8;
  box-shadow: 0 0 0 3px rgba(100, 116, 139, 0.16);
}

.ui-textarea,
textarea.input-field {
  line-height: 1.5;
  min-height: 78px;
}

select.input-field {
  appearance: none;
  background:
    linear-gradient(180deg, #fff, #f9fafb),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%234b5563' d='M7 9.75 2.5 4.5h9z'/%3E%3C/svg%3E") no-repeat right 12px center;
  padding-right: 34px;
}

.ui-btn,
.btn-primary {
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.ui-btn:active,
.btn-primary:active {
  transform: translateY(1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--ui-primary), var(--ui-primary-strong));
  color: #fff;
  padding: 0.62rem 1rem;
  box-shadow: 0 10px 20px -16px rgba(30, 41, 59, 0.8);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2d3b4f, #111827);
}

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ui-muted-note {
  color: var(--ui-text-subtle);
  font-size: 0.82rem;
}

.bottom-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  border-top: 1px solid var(--ui-border);
  background: rgba(252, 253, 255, 0.94);
  backdrop-filter: blur(14px);
  padding: 12px 16px;
  box-shadow: 0 -8px 24px -20px rgba(15, 23, 42, 0.62);
}

.quantity-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--ui-border-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--ui-primary-strong);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.quantity-btn:hover {
  border-color: #94a3b8;
  background: var(--ui-primary-soft);
}

.content-spacer {
  height: 96px;
}

.ui-icon-inline,
.ui-icon-inline-lg,
.ui-icon-title,
.tab-with-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
}

.tab-with-icon {
  gap: 0.44rem;
}

.ui-icon-inline {
  width: 1.12rem;
  height: 1.12rem;
}

.ui-icon-inline-lg {
  width: 1.38rem;
  height: 1.38rem;
}

.ui-icon-title {
  width: 1.34rem;
  height: 1.34rem;
}

.ui-icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.drag-handle-icon {
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.65;
}

.drag-handle-icon-sm {
  width: 1.25rem;
  height: 1.25rem;
  opacity: 0.65;
}

.ui-icon-fallback {
  font-size: 1rem;
  line-height: 1;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.24s ease;
}

@media (max-width: 639px) {
  body {
    padding: 8px !important;
  }

  .glass-card,
  .ui-card {
    border-radius: 14px;
    padding: 14px !important;
  }

  .btn-primary {
    font-size: 0.85rem;
    padding: 0.55rem 0.88rem;
  }

  .input-field,
  .ui-input,
  select.input-field {
    font-size: 16px;
  }

  .bottom-bar {
    padding: 9px 10px;
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  body {
    padding: 16px !important;
  }
}

@media (min-width: 1280px) {
  .max-w-3xl {
    max-width: 58rem;
  }
}