/**
 * QuizMatsuri — 共用樣式（index 頁）
 * 語系頁面可重複引入此檔，文案與 SEO 留在各語系的 index.html。
 *
 * 建議載入順序：
 *   1. Bootstrap
 *   2. Bootstrap Icons
 *   3. 本檔 index.css
 */

/* -------------------------------------------------------------------------- */
/* Design tokens                                                              */
/* -------------------------------------------------------------------------- */
:root {
  --qm-primary: #1d60a8;
  --qm-primary-hover: #164a83;
  --qm-primary-soft: rgba(29, 96, 168, 0.06);
  --qm-accent-red: #d9383a;
  --qm-accent-red-soft: rgba(217, 56, 58, 0.03);
  --qm-primary-soft-dot: rgba(29, 96, 168, 0.03);

  --qm-text: #2c3e50;
  --qm-text-strong: #1a2530;
  --qm-muted: #64748b;

  --qm-bg: #f4f7fb;
  --qm-surface: #ffffff;
  --qm-surface-warm: #fffbf2;
  --qm-header-surface: #fffdf6;
  --qm-footer-surface: #f8f4ea;
  --qm-footer-border: #ebd2bd;
  --qm-hover-row: #f8fafc;

  --qm-border: #e2e8f0;
  --qm-radius-card: 16px;
  --qm-radius-pill: 20px;
  --qm-shadow-card: 0 4px 16px var(--qm-primary-soft);
  --qm-shadow-badge: 0 3px 8px rgba(217, 56, 58, 0.35);

  --qm-tag-bg: #e0f2fe;
  --qm-tag-text: #0369a1;
  --qm-tag-icon: #0284c7;

  --qm-header-offset: 100px;
  --qm-footer-wave-height: 60px;
  --qm-logo-size: 44px;
}

/* -------------------------------------------------------------------------- */
/* Base                                                                       */
/* -------------------------------------------------------------------------- */
body {
  font-family: "Noto Sans TC", "Noto Sans JP", sans-serif;
  background-color: var(--qm-bg);
  color: var(--qm-text);
  background-image:
    radial-gradient(circle at 10% 20%, var(--qm-accent-red-soft) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, var(--qm-primary-soft-dot) 0%, transparent 20%),
    url("../img/bg.png");
  background-position: 10% 20%, 90% 80%, center;
  background-repeat: repeat;
  background-size: 24%, contain;
}

/* 將品牌色接到 Bootstrap 按鈕變數，各語系頁不必再覆寫 */
.btn-primary {
  --bs-btn-bg: var(--qm-primary);
  --bs-btn-border-color: var(--qm-primary);
  --bs-btn-hover-bg: var(--qm-primary-hover);
  --bs-btn-hover-border-color: var(--qm-primary-hover);
  --bs-btn-active-bg: var(--qm-primary-hover);
  --bs-btn-active-border-color: var(--qm-primary-hover);
  --bs-btn-disabled-bg: var(--qm-primary);
  --bs-btn-disabled-border-color: var(--qm-primary);
}

/* -------------------------------------------------------------------------- */
/* Header                                                                     */
/* -------------------------------------------------------------------------- */
.header-navbar {
  background-color: var(--qm-header-surface);
  background-image:
    linear-gradient(
      rgba(255, 253, 246, 0.28),
      rgba(255, 253, 246, 0.28)
    ),
    url("../img/header_bg.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--qm-border);
  overflow: visible;
}

.logo-badge {
  width: var(--qm-logo-size);
  height: var(--qm-logo-size);
  background-color: var(--qm-accent-red);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.4rem;
  box-shadow: var(--qm-shadow-badge);
  border: 2px solid #fff;
}

.logo-badge--sm {
  width: 32px;
  height: 32px;
  font-size: 1rem;
}

.logo-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--qm-text-strong);
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--qm-muted);
  font-weight: 500;
}

/* -------------------------------------------------------------------------- */
/* Cards / layout helpers                                                     */
/* -------------------------------------------------------------------------- */
.main-card {
  background: var(--qm-surface);
  border-radius: var(--qm-radius-card);
  border: 1px solid var(--qm-border);
  box-shadow: var(--qm-shadow-card);
}

.qm-card-bg {
  background-color: var(--qm-surface-warm);
}

.sidebar-sticky {
  top: var(--qm-header-offset);
}

/* -------------------------------------------------------------------------- */
/* Selected vocab pills                                                       */
/* -------------------------------------------------------------------------- */
.selected-tag {
  background-color: var(--qm-tag-bg);
  color: var(--qm-tag-text);
  border-radius: var(--qm-radius-pill);
  padding: 6px 14px;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.selected-tag .btn-close-tag {
  cursor: pointer;
  font-size: 1rem;
  color: var(--qm-tag-icon);
}

.selected-tag .btn-close-tag:hover {
  color: var(--qm-tag-text);
}

#selectedTagsContainer {
  max-height: 280px;
  overflow-y: auto;
}

/* -------------------------------------------------------------------------- */
/* Table                                                                      */
/* -------------------------------------------------------------------------- */
.table > :not(caption) > * > * {
  padding: 1rem 0.75rem;
  vertical-align: middle;
}

.table-hover tbody tr:hover {
  background-color: var(--qm-hover-row);
}

.col-action {
  width: 120px;
}

/* -------------------------------------------------------------------------- */
/* Footer                                                                     */
/* -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--qm-footer-surface);
  border-top: 1px solid var(--qm-footer-border);
  position: relative;
}

.footer-wave-container {
  width: 100%;
  height: var(--qm-footer-wave-height);
  background-image: url("../img/footer_wave_pattern.png");
  background-repeat: repeat-x;
  background-position: bottom center;
  background-size: auto var(--qm-footer-wave-height);
}

/* -------------------------------------------------------------------------- */
/* Utilities missing from Bootstrap 5 (fs-1–fs-6 only)                        */
/* -------------------------------------------------------------------------- */
.fs-7 {
  font-size: 0.875rem;
}

.fs-8 {
  font-size: 0.75rem;
}