/* 冒險齒輪 · 少兒科幻小說庫 (GearNovel Online) 核心樣式 */

:root {
  --bg-primary: #f8f9fc;
  --bg-card: #ffffff;
  --bg-reader: #fcfbfa;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-reader: #2d3748;
  --accent-primary: #0284c7;
  --accent-gear: #d97706;
  --border-color: #e2e8f0;
  --reader-font-size: 18px;
  --reader-line-height: 1.85;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* 暖黃護眼模式 (Sepia / Eye-Care) - 預設推薦少兒閱讀 */
[data-theme="sepia"] {
  --bg-primary: #f5efe6;
  --bg-card: #faf6f0;
  --bg-reader: #fbf7ee;
  --text-primary: #3d3429;
  --text-secondary: #796c5d;
  --text-reader: #382f24;
  --accent-primary: #b45309;
  --accent-gear: #d97706;
  --border-color: #ebdccc;
  --shadow-sm: 0 2px 8px rgba(90, 70, 50, 0.06);
  --shadow-md: 0 4px 16px rgba(90, 70, 50, 0.1);
}

/* 深邃星空夜間模式 (Dark) */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --bg-reader: #151e32;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-reader: #e2e8f0;
  --accent-primary: #38bdf8;
  --accent-gear: #f59e0b;
  --border-color: #334155;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* 純白清新模式 (Light) */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --bg-reader: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-reader: #1e293b;
  --accent-primary: #2563eb;
  --accent-gear: #d97706;
  --border-color: #e2e8f0;
}

/* 字體大小調節 */
[data-font-size="small"] { --reader-font-size: 16px; }
[data-font-size="medium"] { --reader-font-size: 18px; }
[data-font-size="large"] { --reader-font-size: 21px; }
[data-font-size="xlarge"] { --reader-font-size: 25px; }

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* 齒輪轉動旋轉動畫 */
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

.spin-gear {
  animation: spin-slow 20s linear infinite;
}

.spin-gear-reverse {
  animation: spin-reverse 25s linear infinite;
}

/* 閱讀器樣式 */
.reader-container {
  background-color: var(--bg-reader);
  color: var(--text-reader);
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: background-color 0.3s ease, font-size 0.2s ease;
}

.reader-content p {
  margin-bottom: 1.5em;
  text-indent: 2em;
  letter-spacing: 0.03em;
  text-align: justify;
}

.reader-content h2 {
  font-size: 1.4em;
  font-weight: 700;
  margin-top: 2em;
  margin-bottom: 0.8em;
  padding-bottom: 0.4em;
  border-bottom: 2px solid var(--accent-gear);
  color: var(--accent-gear);
  display: flex;
  align-items: center;
  gap: 0.5em;
}

.reader-content blockquote {
  margin: 1.6em 0;
  padding: 1em 1.4em;
  background-color: rgba(217, 119, 6, 0.08);
  border-left: 4px solid var(--accent-gear);
  border-radius: 0 8px 8px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.reader-content blockquote p {
  text-indent: 0;
  margin-bottom: 0.4em;
}

.reader-content blockquote p:last-child {
  margin-bottom: 0;
}

.reader-content hr {
  margin: 2.5em 0;
  border: 0;
  height: 1px;
  background-image: linear-gradient(to right, transparent, var(--border-color), transparent);
}

.reader-content code {
  background-color: rgba(14, 165, 233, 0.12);
  color: var(--accent-primary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

/* 徽章卡片光芒效果 */
.badge-card {
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.badge-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px -5px rgba(217, 119, 6, 0.2);
}

.badge-unlocked {
  border-color: #d97706;
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.08) 0%, rgba(245, 158, 11, 0.02) 100%);
}

.badge-locked {
  filter: grayscale(1);
  opacity: 0.55;
}

/* 平滑捲動 */
html {
  scroll-behavior: smooth;
}

/* 自訂捲軸 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gear);
}

/* 書籤跳轉抵達時的段落聚光高亮動畫 */
@keyframes bookmarkFlash {
  0% {
    background-color: rgba(217, 119, 6, 0.35);
    box-shadow: 0 0 25px rgba(217, 119, 6, 0.4);
    border-radius: 12px;
  }
  50% {
    background-color: rgba(217, 119, 6, 0.2);
  }
  100% {
    background-color: transparent;
    box-shadow: none;
  }
}

.bookmark-focus {
  animation: bookmarkFlash 2.5s ease-out forwards;
}

/* 書籤絲帶裝飾 */
.bookmark-ribbon {
  position: relative;
}
.bookmark-ribbon::after {
  content: '';
  position: absolute;
  top: 0;
  right: 16px;
  width: 14px;
  height: 24px;
  background: #d97706;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 75%, 0 100%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

/* 中英雙語對照模式樣式 */
.bilingual-pair {
  margin-bottom: 1.75rem;
}
.bilingual-pair .zh-para {
  margin-bottom: 0.4rem;
  line-height: var(--reader-line-height);
}
.bilingual-pair .en-para {
  font-family: Georgia, Cambria, "Times New Roman", Times, serif;
  font-size: 0.92em;
  line-height: 1.7;
  font-style: italic;
  padding-left: 0.9rem;
  border-left: 2px solid rgba(217, 119, 6, 0.45);
  color: #64748b;
}
[data-theme="sepia"] .bilingual-pair .en-para {
  color: #796c5d;
  border-left-color: rgba(180, 83, 9, 0.45);
}
[data-theme="dark"] .bilingual-pair .en-para {
  color: #94a3b8;
  border-left-color: rgba(245, 158, 11, 0.45);
}

/* 首頁藏書輪播 (Hero Carousel) */
.hero-carousel-container {
  position: relative;
  overflow: hidden;
}
.hero-slide {
  transition: opacity 0.45s ease-in-out, transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.hero-slide.active {
  opacity: 1;
  pointer-events: auto;
  position: relative;
  z-index: 10;
  transform: translateX(0);
}
.hero-slide.hidden-slide {
  opacity: 0;
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  transform: translateX(20px);
}



/* 中文專名號 / 人名底線 (Proper Noun Underline) */
.reader-content u,
.reader-content .proper-noun,
u.proper-noun {
  text-decoration: underline !important;
  text-decoration-style: solid !important;
  text-underline-offset: 3.5px !important;
  text-decoration-thickness: 1.5px !important;
  text-decoration-skip-ink: none !important;
  text-decoration-color: currentColor !important;
  transition: background-color 0.2s ease, text-decoration-color 0.2s ease;
  cursor: help;
}

.reader-content u:hover,
.reader-content .proper-noun:hover,
u.proper-noun:hover {
  text-decoration-color: var(--accent-gear) !important;
  background-color: rgba(217, 119, 6, 0.12);
  border-radius: 2px;
}

[data-theme="sepia"] .reader-content u,
[data-theme="sepia"] .reader-content .proper-noun,
[data-theme="sepia"] u.proper-noun {
  text-decoration-color: #5c4b37 !important;
}
[data-theme="sepia"] .reader-content u:hover,
[data-theme="sepia"] .reader-content .proper-noun:hover,
[data-theme="sepia"] u.proper-noun:hover {
  text-decoration-color: #b45309 !important;
  background-color: rgba(180, 83, 9, 0.12);
}

[data-theme="dark"] .reader-content u,
[data-theme="dark"] .reader-content .proper-noun,
[data-theme="dark"] u.proper-noun {
  text-decoration-color: #cbd5e1 !important;
}
[data-theme="dark"] .reader-content u:hover,
[data-theme="dark"] .reader-content .proper-noun:hover,
[data-theme="dark"] u.proper-noun:hover {
  text-decoration-color: #fbbf24 !important;
  background-color: rgba(245, 158, 11, 0.18);
}

/* 兒童友善語音朗讀與卡拉OK跟讀聚光燈 (Voice Reading Karaoke Spotlight) */
.reader-content.is-reading > *:not(.speaking-active):not(hr) {
  opacity: 0.42;
  filter: blur(0.25px);
  transition: opacity 0.4s ease, filter 0.4s ease;
}

.reader-content p,
.reader-content h2,
.reader-content h3,
.reader-content blockquote,
.reader-content .bilingual-pair {
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  border-radius: 0.75rem;
}

/* 正在朗讀的段落卡拉OK聚光發光 */
.speaking-active {
  opacity: 1 !important;
  filter: none !important;
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.15) 0%, rgba(245, 158, 11, 0.08) 100%) !important;
  border-left: 6px solid #d97706 !important;
  padding: 0.85rem 1.25rem !important;
  border-radius: 1rem !important;
  box-shadow: 0 8px 30px rgba(217, 119, 6, 0.28), 0 0 15px rgba(245, 158, 11, 0.15) !important;
  transform: scale(1.015);
  position: relative;
  z-index: 20;
}

[data-theme="sepia"] .speaking-active {
  background: linear-gradient(135deg, rgba(180, 83, 9, 0.16) 0%, rgba(217, 119, 6, 0.1) 100%) !important;
  border-left-color: #b45309 !important;
  box-shadow: 0 8px 30px rgba(180, 83, 9, 0.25) !important;
}

[data-theme="dark"] .speaking-active {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.22) 0%, rgba(56, 189, 248, 0.1) 100%) !important;
  border-left-color: #f59e0b !important;
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.35) !important;
}

/* 點讀提示與手勢樣式（僅在主動啟動聽故事模式後生效，預設不干擾一般閱讀） */
.reader-content.listening-mode-enabled p,
.reader-content.listening-mode-enabled h2,
.reader-content.listening-mode-enabled h3,
.reader-content.listening-mode-enabled blockquote,
.reader-content.listening-mode-enabled .bilingual-pair {
  cursor: pointer;
}
.reader-content.listening-mode-enabled p:hover,
.reader-content.listening-mode-enabled .bilingual-pair:hover {
  background-color: rgba(245, 158, 11, 0.06);
}

.tap-to-read-hint {
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}
.reader-content.listening-mode-enabled p:hover .tap-to-read-hint,
.reader-content.listening-mode-enabled .bilingual-pair:hover .tap-to-read-hint {
  opacity: 1;
}

/* ================= 閱讀模式：頂部自動隱藏與感知浮現 (Reader Auto-Hide Header & Toolbar) ================= */
body.is-reading #site-header {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

body.is-reading #site-header.nav-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

body.is-reading #reader-toolbar {
  transform: translateY(calc(-100% - 5rem));
  opacity: 0;
  pointer-events: none;
  transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

body.is-reading #reader-toolbar.nav-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* 頂部滑鼠感應熱區 */
.reader-top-sensor {
  display: none;
}

body.is-reading .reader-top-sensor {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 28px;
  z-index: 45;
  pointer-events: auto;
}