/* ============================================================
 * JDI 脈動傳媒 · 直播中心 (Live Center) 樣式
 * ============================================================
 * 依賴：css/style.css 提供的 :root 變數與 .navbar / .btn 等元件
 * ============================================================ */

/* ---------- 分類色 tokens ---------- */
:root {
  --lc-creator:   #FE2C55;   /* 主播專欄 - 桃紅 */
  --lc-policy:    #25F4EE;   /* 活動政策 - 青藍 */
  --lc-tutorial:  #7B68EE;   /* 直播教學 - 紫色 */
  --lc-revenue:   #FFB84D;   /* 收益策略 - 金色 */

  --lc-creator-glow:  rgba(254, 44, 85, 0.28);
  --lc-policy-glow:   rgba(37, 244, 238, 0.28);
  --lc-tutorial-glow: rgba(123, 104, 238, 0.28);
  --lc-revenue-glow:  rgba(255, 184, 77, 0.28);
}

/* ---------- 主容器 ---------- */
.lc-main {
  background: var(--black);
  color: var(--white);
  min-height: 100vh;
  padding-top: 88px; /* nav 高度 */
}

.lc-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Hero（直播中心首頁頂部） ---------- */
.lc-hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.lc-hero::before {
  content: '';
  position: absolute;
  top: -80px; left: 50%;
  width: 800px; height: 800px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(232,57,42,0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.lc-hero > * { position: relative; z-index: 1; }

.lc-hero-eyebrow {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(232,57,42,0.12);
  border: 1px solid rgba(232,57,42,0.35);
  border-radius: 999px;
  color: #FF6B35;
  font-size: 12px;
  letter-spacing: 2px;
  font-weight: 700;
  margin-bottom: 20px;
}

.lc-hero-title {
  font-size: clamp(36px, 6vw, 60px);
  font-weight: 900;
  line-height: 1.1;
  margin: 0 0 18px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lc-hero-desc {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--gray-light);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Section ---------- */
.lc-section { padding: 40px 0 60px; }

.lc-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.lc-section-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--white);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.lc-section-title::before {
  content: '';
  width: 4px; height: 22px;
  background: var(--gradient);
  border-radius: 4px;
}

.lc-section-link {
  color: var(--gray-light);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--trans);
}
.lc-section-link:hover { color: var(--red-light); }

/* ---------- 精選 3 大卡片 ---------- */
.lc-featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.lc-featured-card {
  background: var(--dark2);
  border: 1px solid var(--dark4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all var(--trans);
  display: flex;
  flex-direction: column;
}

.lc-featured-card:hover {
  transform: translateY(-4px);
  border-color: var(--red);
  box-shadow: var(--shadow-red);
}

.lc-featured-cover {
  aspect-ratio: 16 / 9;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 4 種分類配色的封面 */
.lc-cover--creator {
  background: linear-gradient(135deg, #FE2C55 0%, #C0134D 100%);
  box-shadow: inset 0 0 80px rgba(0,0,0,0.35);
}
.lc-cover--policy {
  background: linear-gradient(135deg, #25F4EE 0%, #0E9494 100%);
  box-shadow: inset 0 0 80px rgba(0,0,0,0.35);
}
.lc-cover--tutorial {
  background: linear-gradient(135deg, #7B68EE 0%, #4B3AC7 100%);
  box-shadow: inset 0 0 80px rgba(0,0,0,0.35);
}
.lc-cover--revenue {
  background: linear-gradient(135deg, #FFB84D 0%, #D8862D 100%);
  box-shadow: inset 0 0 80px rgba(0,0,0,0.35);
}

.lc-cover-emoji {
  font-size: 72px;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
  z-index: 1;
}

.lc-cover-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.08) 0, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,0.08) 0, transparent 40%);
  pointer-events: none;
}

.lc-featured-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.lc-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  align-self: flex-start;
  white-space: nowrap;
  flex-shrink: 0;
}

.lc-tag--creator  { background: rgba(254,44,85,0.15);  color: var(--lc-creator); border: 1px solid rgba(254,44,85,0.35); }
.lc-tag--policy   { background: rgba(37,244,238,0.15); color: var(--lc-policy);  border: 1px solid rgba(37,244,238,0.35); }
.lc-tag--tutorial { background: rgba(123,104,238,0.15);color: var(--lc-tutorial);border: 1px solid rgba(123,104,238,0.35); }
.lc-tag--revenue  { background: rgba(255,184,77,0.15); color: var(--lc-revenue); border: 1px solid rgba(255,184,77,0.35); }

.lc-featured-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
  margin: 0;
}

.lc-featured-excerpt {
  font-size: 14px;
  color: var(--gray-light);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lc-featured-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray);
  font-size: 13px;
  margin-top: auto;
  padding-top: 8px;
}

/* ---------- 分類 4 卡片 ---------- */
.lc-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.lc-category-card {
  background: var(--dark2);
  border: 1px solid var(--dark4);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all var(--trans);
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.lc-category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--_cat-color, var(--red));
}

.lc-category-card[data-cat="creator"]  { --_cat-color: var(--lc-creator); }
.lc-category-card[data-cat="policy"]   { --_cat-color: var(--lc-policy); }
.lc-category-card[data-cat="tutorial"] { --_cat-color: var(--lc-tutorial); }
.lc-category-card[data-cat="revenue"]  { --_cat-color: var(--lc-revenue); }

.lc-category-card:hover {
  transform: translateY(-3px);
  border-color: var(--_cat-color);
  box-shadow: 0 12px 32px var(--_cat-color-glow, rgba(232,57,42,0.25));
}
.lc-category-card[data-cat="creator"]:hover  { box-shadow: 0 12px 32px var(--lc-creator-glow); }
.lc-category-card[data-cat="policy"]:hover   { box-shadow: 0 12px 32px var(--lc-policy-glow); }
.lc-category-card[data-cat="tutorial"]:hover { box-shadow: 0 12px 32px var(--lc-tutorial-glow); }
.lc-category-card[data-cat="revenue"]:hover  { box-shadow: 0 12px 32px var(--lc-revenue-glow); }

.lc-cat-icon {
  font-size: 32px;
  margin-bottom: 4px;
}

.lc-cat-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin: 0;
}

.lc-cat-desc {
  font-size: 14px;
  color: var(--gray-light);
  line-height: 1.5;
  margin: 0;
}

.lc-cat-count {
  margin-top: 8px;
  font-size: 13px;
  color: var(--_cat-color, var(--red-light));
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ---------- 最新文章列表（垂直） ---------- */
.lc-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lc-list-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 18px;
  align-items: center;
  background: var(--dark2);
  border: 1px solid var(--dark4);
  border-radius: var(--radius);
  padding: 14px;
  text-decoration: none;
  color: inherit;
  transition: all var(--trans);
}

.lc-list-item:hover {
  border-color: var(--red);
  transform: translateX(4px);
  background: var(--dark3);
}

.lc-list-cover {
  width: 140px;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lc-list-cover .lc-cover-emoji { font-size: 40px; }

.lc-list-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lc-list-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin: 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lc-list-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-size: 13px;
  color: var(--gray);
}

.lc-list-meta > span {
  white-space: nowrap;
}

.lc-list-arrow {
  color: var(--gray);
  font-size: 20px;
  padding: 0 12px;
}

@media (max-width: 640px) {
  .lc-list-item {
    grid-template-columns: 100px 1fr;
  }
  .lc-list-cover { width: 100px; }
  .lc-list-cover .lc-cover-emoji { font-size: 30px; }
  .lc-list-arrow { display: none; }
}

/* ---------- 麵包屑 ---------- */
.lc-breadcrumb {
  padding: 16px 0 8px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--gray);
}

.lc-breadcrumb a {
  color: var(--gray-light);
  text-decoration: none;
  transition: color var(--trans);
}

.lc-breadcrumb a:hover { color: var(--red-light); }

.lc-breadcrumb-sep { color: var(--dark4); }

.lc-breadcrumb-current { color: var(--white); }

/* ---------- 分類列表頁頂部 ---------- */
.lc-cat-header {
  padding: 40px 0 30px;
  text-align: center;
  border-bottom: 1px solid var(--dark4);
  margin-bottom: 40px;
}

.lc-cat-header-icon {
  font-size: 52px;
  margin-bottom: 12px;
}

.lc-cat-header-title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 900;
  color: var(--white);
  margin: 0 0 8px;
}

.lc-cat-header-desc {
  font-size: 15px;
  color: var(--gray-light);
  margin: 0;
}

.lc-cat-header-count {
  margin-top: 14px;
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--dark3);
  color: var(--gray-light);
  font-size: 13px;
}

/* ---------- 單篇文章頁 ---------- */
.lc-article {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.lc-article-hero {
  padding: 20px 0 30px;
}

.lc-article-title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 900;
  color: var(--white);
  line-height: 1.25;
  margin: 14px 0 16px;
}

.lc-article-subtitle {
  font-size: 17px;
  color: var(--gray-light);
  line-height: 1.6;
  margin: 0 0 20px;
  font-weight: 400;
}

.lc-article-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--gray);
  font-size: 14px;
  flex-wrap: wrap;
}

.lc-article-cover {
  width: 100%;
  aspect-ratio: 16 / 8;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 24px 0 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lc-article-cover .lc-cover-emoji { font-size: 120px; }

/* 照片型 hero cover（實拍圖 / 示意圖） */
.lc-article-cover--photo {
  aspect-ratio: 16 / 9;
  position: relative;
  background: #0a0a0f;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.06);
}
.lc-article-cover--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.lc-article-cover-caption {
  display: block;
  margin-top: -24px;
  margin-bottom: 40px;
  font-size: 13px;
  color: var(--gray-light, #7A7A85);
  text-align: center;
  font-style: italic;
}

/* 文章正文樣式 */
.lc-article-body {
  color: #D5D5DA;
  font-size: 17px;
  line-height: 1.85;
}

.lc-article-body h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--white);
  margin: 48px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--red);
  line-height: 1.35;
}

.lc-article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin: 32px 0 12px;
}

.lc-article-body p {
  margin: 0 0 20px;
}

.lc-article-body strong { color: var(--white); font-weight: 700; }

.lc-article-body a {
  color: var(--red-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.lc-article-body a:hover { color: #FF7B4A; }

.lc-article-body ul,
.lc-article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.lc-article-body li {
  margin-bottom: 8px;
}

.lc-article-body blockquote {
  border-left: 4px solid var(--red);
  background: var(--dark2);
  margin: 28px 0;
  padding: 18px 22px;
  border-radius: 0 12px 12px 0;
  color: var(--gray-light);
  font-style: normal;
  font-size: 16px;
}

.lc-article-body blockquote p:last-child { margin-bottom: 0; }

.lc-article-body hr {
  border: none;
  border-top: 1px solid var(--dark4);
  margin: 40px 0;
}

.lc-article-body code {
  background: var(--dark3);
  color: #FFB37A;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 15px;
  font-family: 'SF Mono', Consolas, monospace;
}

.lc-callout {
  background: linear-gradient(135deg, rgba(232,57,42,0.08), rgba(255,180,50,0.05));
  border: 1px solid rgba(232,57,42,0.3);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 28px 0;
}
.lc-callout-title {
  font-weight: 700;
  color: var(--red-light);
  margin: 0 0 8px;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.lc-callout p:last-child { margin-bottom: 0; }

/* 文章底部 CTA */
.lc-article-cta {
  margin-top: 60px;
  padding: 32px;
  background: var(--dark2);
  border: 1px solid var(--dark4);
  border-radius: var(--radius-lg);
  text-align: center;
}

.lc-article-cta-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 8px;
}

.lc-article-cta-desc {
  color: var(--gray-light);
  margin: 0 0 20px;
  font-size: 14px;
}

.lc-article-cta-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.lc-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: all var(--trans);
}

.lc-btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: var(--shadow-red);
}
.lc-btn-primary:hover { transform: translateY(-2px); filter: brightness(1.1); }

.lc-btn-secondary {
  background: var(--dark3);
  color: var(--white);
  border: 1px solid var(--dark4);
}
.lc-btn-secondary:hover {
  border-color: var(--red);
  color: var(--red-light);
}

/* 相關文章 */
.lc-related {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--dark4);
}

.lc-related-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--white);
  margin: 0 0 20px;
}

.lc-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

/* 相關文章卡片內部縮小封面 + 隱藏箭頭，讓文字有足夠空間 */
.lc-related-grid .lc-list-item {
  grid-template-columns: 110px 1fr;
  gap: 14px;
}
.lc-related-grid .lc-list-cover {
  width: 110px;
}
.lc-related-grid .lc-list-arrow {
  display: none;
}

/* ---------- 響應式 ---------- */
@media (max-width: 640px) {
  .lc-main { padding-top: 72px; }
  .lc-hero { padding: 40px 0 30px; }
  .lc-section { padding: 20px 0 40px; }
  .lc-container { padding: 0 16px; }
  .lc-article { padding: 0 16px 60px; }
  .lc-article-body { font-size: 16px; }
  .lc-article-body h2 { font-size: 22px; margin: 36px 0 12px; }
  .lc-article-body h3 { font-size: 18px; }
  .lc-article-cover .lc-cover-emoji { font-size: 72px; }
}

/* ============================================================
 * Sub-navigation（直播中心子導航列）
 * Medium 風格 · sticky 於主 nav 下方
 * ============================================================ */
.lc-subnav {
  position: sticky;
  /* 主 nav 高度 68px + iOS 瀏海 safe area */
  top: calc(68px + env(safe-area-inset-top));
  z-index: 90;
  background: rgba(5, 5, 10, 0.85);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--dark4);
  margin-bottom: 40px;
}

.lc-subnav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.lc-subnav-inner::-webkit-scrollbar { display: none; }

.lc-subnav-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 16px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-light);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--trans), border-color var(--trans);
  flex-shrink: 0;
}

.lc-subnav-item:hover {
  color: var(--white);
}

.lc-subnav-item.active {
  color: var(--white);
  border-bottom-color: var(--red);
}
.lc-subnav-item.active[data-cat="creator"]  { border-bottom-color: var(--lc-creator); }
.lc-subnav-item.active[data-cat="policy"]   { border-bottom-color: var(--lc-policy); }
.lc-subnav-item.active[data-cat="tutorial"] { border-bottom-color: var(--lc-tutorial); }
.lc-subnav-item.active[data-cat="revenue"]  { border-bottom-color: var(--lc-revenue); }

@media (max-width: 640px) {
  .lc-subnav { top: calc(60px + env(safe-area-inset-top)); margin-bottom: 24px; }
  .lc-subnav-inner { padding: 0 16px; }
  .lc-subnav-item { padding: 14px 10px; font-size: 13px; }
}

/* ============================================================
 * 列表卡片 · 圖片封面（Task 5）
 * ============================================================ */
.lc-list-cover--photo {
  background: #0a0a0f;
}
.lc-list-cover--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ============================================================
 * 精選卡片 · 圖片封面（Task 6）
 * ============================================================ */
.lc-featured-cover--photo {
  background: #0a0a0f;
}
.lc-featured-cover--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}