/* ============================================================
   IELTS Vocabulary Game · Premium — Styles
   高级版：金色 / 尊享视觉
   ============================================================ */

/* ---- CSS 变量：暗色（默认） ---- */
.vocab-game-page.premium-game {
  --premium-bg: linear-gradient(135deg, #0A1F3A 0%, #1A3A63 40%, #2D5A8A 100%);
  --premium-glow-1: rgba(232, 168, 56, 0.18);
  --premium-glow-2: rgba(232, 168, 56, 0.1);
  --premium-text-primary: #ffffff;
  --premium-text-secondary: rgba(255, 255, 255, 0.75);
  --premium-text-muted: rgba(255, 255, 255, 0.5);
  --premium-text-gold: #F5C76B;
  --premium-surface: rgba(255, 255, 255, 0.06);
  --premium-surface-hover: rgba(255, 255, 255, 0.1);
  --premium-surface-strong: rgba(255, 255, 255, 0.08);
  --premium-border: rgba(255, 255, 255, 0.08);
  --premium-border-strong: rgba(255, 255, 255, 0.15);
  --premium-cat-bg: rgba(255, 255, 255, 0.08);
  --premium-cat-bg-hover: rgba(255, 255, 255, 0.14);
  --premium-cat-color: rgba(255, 255, 255, 0.75);
  --premium-cat-active-bg: linear-gradient(135deg, rgba(232, 168, 56, 0.2) 0%, rgba(245, 199, 107, 0.15) 100%);
  --premium-diff-bg: rgba(255, 255, 255, 0.06);
  --premium-diff-border: rgba(255, 255, 255, 0.15);
  --premium-diff-color: rgba(255, 255, 255, 0.7);
  --premium-diff-active-bg: rgba(245, 199, 107, 0.15);
  --premium-outline-bg: rgba(255, 255, 255, 0.08);
  --premium-outline-border: rgba(255, 255, 255, 0.15);
  --premium-outline-color: rgba(255, 255, 255, 0.8);
  --premium-outline-hover-bg: rgba(255, 255, 255, 0.14);
  --premium-outline-hover-color: #ffffff;
  --premium-tag-bg: rgba(245, 199, 107, 0.15);
  --premium-review-bg: rgba(245, 199, 107, 0.12);
  --premium-review-border: rgba(245, 199, 107, 0.3);
  --premium-lock-trial-bg: rgba(255, 255, 255, 0.08);
  --premium-lock-trial-hover: rgba(232, 168, 56, 0.15);
  --premium-empty-color: rgba(255, 255, 255, 0.5);
  --premium-remove-color: rgba(255, 255, 255, 0.4);
}

/* ---- CSS 变量：日光模式 ---- */
html[data-theme="light"] .vocab-game-page.premium-game {
  --premium-bg: linear-gradient(135deg, #FFF8E7 0%, #FFFDF5 40%, #FFFAED 100%);
  --premium-glow-1: rgba(232, 168, 56, 0.14);
  --premium-glow-2: rgba(232, 168, 56, 0.06);
  --premium-text-primary: #1A1203;
  --premium-text-secondary: #5A4A2A;
  --premium-text-muted: #8A7A5A;
  --premium-text-gold: #B8860B;
  --premium-surface: rgba(184, 134, 11, 0.06);
  --premium-surface-hover: rgba(184, 134, 11, 0.1);
  --premium-surface-strong: rgba(184, 134, 11, 0.08);
  --premium-border: rgba(184, 134, 11, 0.12);
  --premium-border-strong: rgba(184, 134, 11, 0.25);
  --premium-cat-bg: rgba(255, 255, 255, 0.7);
  --premium-cat-bg-hover: rgba(255, 255, 255, 0.95);
  --premium-cat-color: #5A4A2A;
  --premium-cat-active-bg: linear-gradient(135deg, rgba(232, 168, 56, 0.18) 0%, rgba(245, 199, 107, 0.12) 100%);
  --premium-diff-bg: rgba(255, 255, 255, 0.6);
  --premium-diff-border: rgba(184, 134, 11, 0.25);
  --premium-diff-color: #6B5A30;
  --premium-diff-active-bg: rgba(232, 168, 56, 0.2);
  --premium-outline-bg: rgba(255, 255, 255, 0.6);
  --premium-outline-border: rgba(184, 134, 11, 0.3);
  --premium-outline-color: #8B6914;
  --premium-outline-hover-bg: rgba(232, 168, 56, 0.15);
  --premium-outline-hover-color: #6B4E0A;
  --premium-tag-bg: rgba(232, 168, 56, 0.18);
  --premium-review-bg: rgba(245, 199, 107, 0.18);
  --premium-review-border: rgba(232, 168, 56, 0.4);
  --premium-lock-trial-bg: rgba(255, 255, 255, 0.6);
  --premium-lock-trial-hover: rgba(232, 168, 56, 0.2);
  --premium-empty-color: #A08A5A;
  --premium-remove-color: rgba(139, 105, 20, 0.5);
}

/* 页面背景 */
.vocab-game-page.premium-game {
  background: var(--premium-bg);
  position: relative;
}

.vocab-game-page.premium-game::before {
  content: '';
  position: absolute;
  top: -250px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--premium-glow-1) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}

.vocab-game-page.premium-game::after {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--premium-glow-2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

/* 高级徽章 */
.premium-badge-gold {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 50%, #D4952A 100%);
  color: #2A1A05;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 8px rgba(232, 168, 56, 0.4);
  border: 1px solid rgba(255, 235, 180, 0.6);
}

/* 标题/描述 */
.vocab-game-page.premium-game .vocab-game__title {
  color: var(--premium-text-primary);
}

.vocab-game-page.premium-game .vocab-game__subtitle {
  color: var(--premium-text-muted);
}

.vocab-game-page.premium-game .vocab-game__intro {
  color: var(--premium-text-secondary);
}

.vocab-game-page.premium-game .vocab-game__vocab-count {
  color: var(--premium-text-secondary);
}

.vocab-game-page.premium-game .vocab-game__vocab-count strong {
  color: var(--premium-text-gold);
}

/* 主按钮 金色 */
.vocab-game-page.premium-game .vocab-game__btn--primary {
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  color: #2A1A05;
  box-shadow: 0 4px 16px rgba(232, 168, 56, 0.4);
}

.vocab-game-page.premium-game .vocab-game__btn--primary:hover {
  background: linear-gradient(135deg, #D4952A 0%, #E8A838 100%);
  box-shadow: 0 6px 20px rgba(232, 168, 56, 0.5);
  transform: translateY(-1px);
}

/* 分类按钮 */
.vocab-game-page.premium-game .vocab-game__categories-label {
  color: var(--premium-text-secondary);
}

.vocab-game-page.premium-game .vocab-game__cat-btn {
  background: var(--premium-cat-bg);
  color: var(--premium-cat-color);
  border: 1px solid var(--premium-border-strong);
}

.vocab-game-page.premium-game .vocab-game__cat-btn:hover {
  background: var(--premium-cat-bg-hover);
  color: var(--premium-text-gold);
}

.vocab-game-page.premium-game .vocab-game__cat-btn.is-active {
  background: var(--premium-cat-active-bg);
  color: var(--premium-text-gold);
  border-color: #E8A838;
  box-shadow: 0 0 0 2px rgba(232, 168, 56, 0.15);
}

/* 难度选择 */
.premium-difficulty {
  margin-top: 14px;
}

.premium-difficulty__label {
  font-size: 13px;
  color: var(--premium-text-secondary);
  margin-bottom: 8px;
}

.premium-difficulty__list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.premium-difficulty__btn {
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid var(--premium-diff-border);
  background: var(--premium-diff-bg);
  color: var(--premium-diff-color);
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.premium-difficulty__btn:hover {
  background: var(--premium-surface-hover);
  color: var(--premium-text-gold);
}

.premium-difficulty__btn.is-active {
  background: var(--premium-diff-active-bg);
  color: var(--premium-text-gold);
  border-color: #E8A838;
}

/* 统计卡 */
.premium-stats-card {
  margin-top: 20px;
  padding: 16px 20px;
  background: var(--premium-surface);
  border: 1px solid var(--premium-border);
  border-radius: 12px;
}

.premium-stats-card__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--premium-text-secondary);
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.premium-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  text-align: center;
}

.premium-stat-item__value {
  font-size: 22px;
  font-weight: 700;
  color: var(--premium-text-gold);
  line-height: 1.1;
}

.premium-stat-item__label {
  font-size: 11px;
  color: var(--premium-text-muted);
  margin-top: 4px;
}

@media (max-width: 480px) {
  .premium-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
}

/* 功能入口区 */
.premium-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.premium-feature-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px 16px;
  background: var(--premium-surface);
  border: 1px solid var(--premium-border);
  border-radius: 10px;
  color: var(--premium-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: all 0.15s;
}

.premium-feature-btn:hover {
  background: var(--premium-surface-hover);
  border-color: var(--premium-border-strong);
  color: var(--premium-text-primary);
  transform: translateY(-1px);
}

.premium-feature-btn__icon {
  font-size: 18px;
}

.premium-feature-btn__label {
  font-size: 13px;
}

.premium-feature-btn__desc {
  font-size: 11px;
  color: var(--premium-text-muted);
  font-weight: 400;
}

/* 顶部试玩横幅 */
.premium-top-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 16px;
  margin-bottom: 16px;
  background: linear-gradient(90deg, rgba(232, 168, 56, 0.15), rgba(245, 199, 107, 0.1), rgba(232, 168, 56, 0.15));
  border: 1px solid rgba(232, 168, 56, 0.3);
  border-radius: 10px;
  color: var(--premium-text-gold);
  font-size: 13px;
  font-weight: 500;
}

.premium-top-banner__text {
  flex: 1;
  text-align: center;
}

.premium-top-banner__btn {
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  color: #2A1A05;
  border: none;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  flex-shrink: 0;
}

.premium-top-banner__btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(232, 168, 56, 0.4);
}

/* 锁定页 */
.premium-lock-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: 40px 20px;
}

.premium-lock-screen__icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 8px 32px rgba(232, 168, 56, 0.4);
}

.premium-lock-screen__icon svg {
  width: 40px;
  height: 40px;
  color: #2A1A05;
}

.premium-lock-screen__title {
  font-size: 28px;
  font-weight: 700;
  color: var(--premium-text-primary);
  margin: 0 0 12px;
}

.premium-lock-screen__desc {
  font-size: 15px;
  color: var(--premium-text-secondary);
  margin: 0 0 32px;
  max-width: 420px;
  line-height: 1.6;
}

.premium-lock-screen__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.premium-lock-screen__btn {
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  border: none;
  transition: all 0.15s;
}

.premium-lock-screen__btn--primary {
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  color: #2A1A05;
  box-shadow: 0 4px 16px rgba(232, 168, 56, 0.4);
}

.premium-lock-screen__btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(232, 168, 56, 0.5);
}

.premium-lock-screen__btn--trial {
  background: var(--premium-lock-trial-bg);
  color: var(--premium-text-gold);
  border: 1px solid rgba(232, 168, 56, 0.5);
}

.premium-lock-screen__btn--trial:hover {
  background: var(--premium-lock-trial-hover);
  border-color: rgba(232, 168, 56, 0.7);
}

.premium-lock-screen__btn--secondary {
  background: var(--premium-outline-bg);
  color: var(--premium-outline-color);
  border: 1px solid var(--premium-outline-border);
}

.premium-lock-screen__btn--secondary:hover {
  background: var(--premium-outline-hover-bg);
  color: var(--premium-outline-hover-color);
}

/* 错题本 / 生词本列表 */
.premium-book-page {
  max-width: 760px;
  margin: 0 auto;
}

.premium-book-page__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.premium-book-page__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--premium-text-primary);
  margin: 0;
}

.premium-book-page__count {
  font-size: 13px;
  color: var(--premium-text-muted);
}

.premium-book-page__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.premium-book-page__btn {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid var(--premium-outline-border);
  background: var(--premium-outline-bg);
  color: var(--premium-outline-color);
  transition: all 0.15s;
}

.premium-book-page__btn:hover {
  background: var(--premium-outline-hover-bg);
  color: var(--premium-outline-hover-color);
}

.premium-book-page__btn--primary {
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  color: #2A1A05;
  border-color: transparent;
}

.premium-book-page__btn--primary:hover {
  opacity: 0.9;
}

.premium-word-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.premium-word-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: var(--premium-surface);
  border: 1px solid var(--premium-border);
  border-radius: 10px;
  transition: background 0.15s;
}

.premium-word-item:hover {
  background: var(--premium-surface-hover);
}

.premium-word-item__main {
  flex: 1;
  min-width: 0;
}

.premium-word-item__word {
  font-size: 16px;
  font-weight: 600;
  color: var(--premium-text-primary);
}

.premium-word-item__phonetic {
  font-size: 12px;
  color: var(--premium-text-muted);
  margin-left: 8px;
  font-weight: 400;
}

.premium-word-item__meaning {
  font-size: 13px;
  color: var(--premium-text-secondary);
  margin-top: 3px;
}

.premium-word-item__meta {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.premium-word-tag {
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--premium-tag-bg);
  color: var(--premium-text-gold);
  font-size: 11px;
  font-weight: 500;
}

.premium-word-item__remove {
  background: none;
  border: none;
  color: var(--premium-remove-color);
  cursor: pointer;
  font-size: 18px;
  padding: 4px 8px;
  border-radius: 6px;
  font-family: inherit;
  transition: all 0.15s;
}

.premium-word-item__remove:hover {
  color: #ff6b6b;
  background: rgba(255, 107, 107, 0.1);
}

.premium-book-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--premium-empty-color);
}

.premium-book-empty__icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.6;
}

.premium-book-empty__text {
  font-size: 15px;
  margin: 0;
}

/* 复习模式头部 */
.review-mode-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  margin-bottom: 16px;
  background: var(--premium-review-bg);
  border: 1px solid var(--premium-review-border);
  border-radius: 10px;
  color: var(--premium-text-gold);
  font-size: 13px;
  font-weight: 500;
}

.review-mode-banner__close {
  background: none;
  border: none;
  color: var(--premium-text-secondary);
  cursor: pointer;
  font-size: 12px;
  font-family: inherit;
  text-decoration: underline;
}

.review-mode-banner__close:hover {
  color: var(--premium-text-gold);
}

/* 游戏大厅中高级版卡片 金色样式 */
.vocab-hall-card--ielts-premium {
  position: relative;
  border-top: 4px solid #E8A838;
  background: var(--bg-card, #fff);
}

.vocab-hall-card--ielts-premium::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 2px;
  background: linear-gradient(135deg, #E8A838, #F5C76B, #D4952A);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: 0.9;
}

.vocab-hall-card--ielts-premium:hover::before {
  opacity: 1;
}

.vocab-hall-card--ielts-premium .vocab-hall-card__title {
  color: var(--text-primary);
}

.vocab-hall-card--ielts-premium .vocab-hall-card__btn {
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  color: #2A1A05;
  font-weight: 600;
}

.vocab-hall-card--ielts-premium .vocab-hall-card__btn:hover {
  opacity: 0.9;
}

.premium-badge--gold {
  background: linear-gradient(135deg, #E8A838 0%, #F5C76B 100%);
  color: #2A1A05 !important;
  border-radius: 999px;
  font-weight: 700;
  font-size: 10px;
  padding: 2px 8px;
  vertical-align: middle;
}

/* 结果页导出错题按钮（高级版解锁样式） */
.vocab-game-page.premium-game .vocab-game__btn--outline {
  background: var(--premium-outline-bg);
  border: 1px solid var(--premium-outline-border);
  color: var(--premium-outline-color);
}

.vocab-game-page.premium-game .vocab-game__btn--outline:hover {
  background: var(--premium-outline-hover-bg);
  color: var(--premium-outline-hover-color);
}

/* 游戏中页面文字（score/combo 等也套变量） */
.vocab-game-page.premium-game .vocab-game__score {
  color: var(--premium-text-gold);
}

.vocab-game-page.premium-game .vocab-game__high-score-value {
  color: var(--premium-text-gold);
}

.vocab-game-page.premium-game .vocab-game__final-score {
  color: var(--premium-text-gold);
}

.vocab-game-page.premium-game .vocab-game__new-record {
  color: var(--premium-text-gold);
}

.vocab-game-page.premium-game .vocab-game__combo-popup {
  color: var(--premium-text-gold);
}

.vocab-game-page.premium-game .vocab-game__feedback--correct {
  color: #4ade80;
}

.vocab-game-page.premium-game .vocab-game__feedback--wrong {
  color: #f87171;
}