/*
 * 书字在 - 书法练习站 主样式
 * Tailwind CSS 扩展与自定义样式
 * 注意：Tailwind CSS 通过 CDN 加载，此处仅定义自定义样式
 */

:root {
  /* 主题色 */
  --ink-black: #1a1a1a;
  --ink-black-light: #333333;
  --paper-white: #f5f0e8;
  --paper-white-dark: #e8e0d0;
  --seal-red: #c23a2b;
  --seal-red-light: #d4564a;
  --seal-red-dark: #a02e22;
  --gold-accent: #b8860b;
  --jade-green: #2e8b57;

  /* 功能色 */
  --bg-primary: #faf8f4;
  --bg-secondary: #f0ece4;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border-color: #d4cfc5;
}

/* ============================================
   搜索按钮样式
   ============================================ */
.search-btn {
  background-color: var(--seal-red) !important;
  color: white !important;
  border: none !important;
  padding: 0.5rem 1.5rem !important;
  border-radius: 0.5rem !important;
  cursor: pointer !important;
  font-weight: 600 !important;
  transition: background-color 0.2s !important;
}

.search-btn:hover {
  background-color: var(--seal-red-dark) !important;
}

/* ============================================
   Tailwind 自定义工具类
   ============================================ */
@layer utilities {
  .text-ink-black { color: var(--ink-black); }
  .text-ink-black-light { color: var(--ink-black-light); }
  .text-paper-white { color: var(--paper-white); }
  .text-seal-red { color: var(--seal-red); }
  .text-seal-red-light { color: var(--seal-red-light); }
  .text-gold-accent { color: var(--gold-accent); }
  .text-jade-green { color: var(--jade-green); }

  .bg-ink-black { background-color: var(--ink-black); }
  .bg-paper-white { background-color: var(--paper-white); }
  .bg-paper-white-dark { background-color: var(--paper-white-dark); }
  .bg-seal-red { background-color: var(--seal-red); }
  .bg-seal-red-light { background-color: var(--seal-red-light); }
  .bg-gold-accent { background-color: var(--gold-accent); }

  .border-seal-red { border-color: var(--seal-red); }
  .border-paper-white-dark { border-color: var(--paper-white-dark); }
}

/* ============================================
   基础样式
   ============================================ */
* {
  box-sizing: border-box;
}

body {
  font-family: "Noto Serif SC", "Source Han Serif SC", "思源宋体", serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Worksheet preview canvas responsive fix */
#worksheet-preview {
  position: relative;
  z-index: 1;
}

#worksheet-preview canvas {
  max-width: 100%;
  height: auto;
}

/* ============================================
   书法格子样式
   ============================================ */

/* 米字格 */
.grid-mizi {
  background-image:
    linear-gradient(45deg, transparent 49.5%, var(--seal-red) 49.5%, var(--seal-red) 50.5%, transparent 50.5%),
    linear-gradient(-45deg, transparent 49.5%, var(--seal-red) 49.5%, var(--seal-red) 50.5%, transparent 50.5%),
    linear-gradient(to right, transparent 49.5%, var(--seal-red) 49.5%, var(--seal-red) 50.5%, transparent 50.5%),
    linear-gradient(to bottom, transparent 49.5%, var(--seal-red) 49.5%, var(--seal-red) 50.5%, transparent 50.5%);
  background-size: 100% 100%;
  border: 1px solid var(--seal-red);
  opacity: 0.3;
}

/* 田字格 */
.grid-tian {
  background-image:
    linear-gradient(to right, transparent 49.5%, var(--seal-red) 49.5%, var(--seal-red) 50.5%, transparent 50.5%),
    linear-gradient(to bottom, transparent 49.5%, var(--seal-red) 49.5%, var(--seal-red) 50.5%, transparent 50.5%);
  background-size: 100% 100%;
  border: 1px solid var(--seal-red);
  opacity: 0.3;
}

/* 九宫格 */
.grid-jiugong {
  background-image:
    linear-gradient(to right, transparent 32%, var(--seal-red) 32%, var(--seal-red) 34%, transparent 34%),
    linear-gradient(to right, transparent 65%, var(--seal-red) 65%, var(--seal-red) 67%, transparent 67%),
    linear-gradient(to bottom, transparent 32%, var(--seal-red) 32%, var(--seal-red) 34%, transparent 34%),
    linear-gradient(to bottom, transparent 65%, var(--seal-red) 65%, var(--seal-red) 67%, transparent 67%);
  background-size: 100% 100%;
  border: 1px solid var(--seal-red);
  opacity: 0.3;
}

/* 回宫格 */
.grid-huigong {
  background-image:
    linear-gradient(to right, transparent 24%, var(--seal-red) 24%, var(--seal-red) 25%, transparent 25%),
    linear-gradient(to right, transparent 74%, var(--seal-red) 74%, var(--seal-red) 75%, transparent 75%),
    linear-gradient(to bottom, transparent 24%, var(--seal-red) 24%, var(--seal-red) 25%, transparent 25%),
    linear-gradient(to bottom, transparent 74%, var(--seal-red) 74%, var(--seal-red) 75%, transparent 75%);
  background-size: 100% 100%;
  border: 1px solid var(--seal-red);
  opacity: 0.3;
}

/* 格子容器 */
.grid-cell {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid-cell .grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.grid-cell .grid-char {
  position: relative;
  z-index: 1;
  font-size: 140px;
  color: var(--ink-black);
  opacity: 0.2;
}

/* ============================================
   Canvas 书写区样式
   ============================================ */
.canvas-container {
  position: relative;
  background-color: var(--paper-white);
  border: 2px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.canvas-container canvas {
  display: block;
  cursor: crosshair;
  touch-action: none;
}

/* ============================================
   布局组件
   ============================================ */

/* Header 导航 */
.site-header {
  background: linear-gradient(to bottom, var(--paper-white), var(--bg-primary));
  border-bottom: 1px solid var(--border-color);
}

.site-header .nav-link {
  position: relative;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.site-header .nav-link:hover,
.site-header .nav-link.active {
  color: var(--seal-red);
}

.site-header .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background-color: var(--seal-red);
}

/* Footer */
.site-footer {
  background-color: var(--ink-black);
  color: var(--paper-white);
}

/* Cookie 同意栏 */
.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink-black);
  color: var(--paper-white);
  padding: 1rem;
  z-index: 9999;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.cookie-consent.visible {
  transform: translateY(0);
}

/* 卡片 */
.card {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  transform: translateY(-2px);
}

/* 热门标签 */
.hot-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  margin: 0.25rem;
  background-color: var(--paper-white);
  border-radius: 9999px;
  font-size: 0.875rem;
  transition: background-color 0.2s, color 0.2s;
}

.hot-tag:hover {
  background-color: var(--seal-red);
  color: white;
}

/* Tab 激活态 */
.tab-btn.active {
  color: var(--seal-red);
  border-bottom: 2px solid var(--seal-red);
}

/* Google AdSense 广告位样式 */
.ad-slot {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: rgba(255, 255, 255, 0.3);
  font-size: 12px;
  padding: 16px;
  min-height: 60px;
}

.ad-slot-horizontal {
  height: 90px;
}

.ad-slot-vertical {
  height: 600px;
}

.ad-slot-square {
  height: 250px;
}

.ad-slot-auto {
  min-height: 120px;
}

/* 广告位隐藏类（用于未接入广告时隐藏） */
.ad-slot.hidden-ad {
  display: none;
}

/* 瀑布流 */
.masonry-grid {
  column-count: 6;
  column-gap: 0.5rem;
}

@media (max-width: 1280px) {
  .masonry-grid {
    column-count: 5;
  }
}

@media (max-width: 1024px) {
  .masonry-grid {
    column-count: 4;
  }
}

@media (max-width: 768px) {
  .masonry-grid {
    column-count: 3;
  }
}

@media (max-width: 480px) {
  .masonry-grid {
    column-count: 2;
  }
}

/* 日历打卡 */
.calendar-checkin .day-cell {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.875rem;
}

.calendar-checkin .day-cell.checked {
  background-color: var(--seal-red);
  color: white;
}

.calendar-checkin .day-cell.today {
  border: 2px solid var(--seal-red);
}

/* 广告位 */
.ad-slot {
  background-color: var(--paper-white-dark);
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================================
   Practice Queue 缩略图条
   ============================================ */
.scrollbar-hide::-webkit-scrollbar {
  display: none;
}
.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.queue-thumb.active {
  border-color: var(--seal-red) !important;
  box-shadow: 0 0 0 1px var(--seal-red);
}

.queue-thumb-delete {
  opacity: 0;
  transition: opacity 0.2s;
}

.queue-thumb-wrapper:hover .queue-thumb-delete {
  opacity: 1;
}

/* Mode Tabs */
.mode-tab {
  border: 2px solid var(--border-color);
  color: var(--text-secondary);
  transition: all 0.2s;
}
.mode-tab.active {
  border-color: var(--seal-red);
  background-color: var(--seal-red);
  color: #fff;
}
.mode-tab:not(.active):hover {
  border-color: var(--seal-red);
  color: var(--seal-red);
}

/* 作品管理页面缩略图 */
.gallery-thumb {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 4px;
}

/* Manual mode thumbnails */
.manual-thumb {
  transition: border-color 0.15s, background-color 0.15s;
}
.manual-thumb:hover {
  transform: scale(1.05);
}

/* ============================================
   Tailwind Typography (prose) 自定义样式
   说明：本地 tailwind.min.js 不含 Typography 插件，需手动编写
   ============================================ */
.prose {
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.75;
}
.prose h1,
.prose h2,
.prose h3,
.prose h4,
.prose h5,
.prose h6 {
  color: var(--ink-black);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 1rem;
}
.prose h1 {
  font-size: 2.25rem;       /* 36px */
  border-bottom: 2px solid var(--seal-red);
  padding-bottom: 0.5rem;
}
.prose h2 {
  font-size: 1.75rem;       /* 28px */
  border-left: 4px solid var(--seal-red);
  padding-left: 0.75rem;
  margin-top: 2.5rem;
}
.prose h3 {
  font-size: 1.375rem;      /* 22px */
  margin-top: 1.75rem;
}
.prose h4 {
  font-size: 1.125rem;      /* 18px */
  margin-top: 1.5rem;
}
.prose h5,
.prose h6 {
  font-size: 1rem;
}
.prose p {
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  text-align: justify;
}
.prose a {
  color: var(--seal-red);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.prose a:hover {
  color: var(--seal-red-dark);
}
.prose strong {
  font-weight: 700;
  color: var(--ink-black);
}
.prose em {
  font-style: italic;
}
.prose del {
  text-decoration: line-through;
  color: var(--text-secondary);
}
.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  border-left: 4px solid var(--gold-accent);
  background-color: var(--paper-white);
  color: var(--ink-black-light);
  font-style: italic;
  border-radius: 0 0.25rem 0.25rem 0;
}
.prose blockquote p:first-child {
  margin-top: 0;
}
.prose blockquote p:last-child {
  margin-bottom: 0;
}
.prose ul,
.prose ol {
  margin: 1.25rem 0;
  padding-left: 1.75rem;
}
.prose ul {
  list-style-type: disc;
}
.prose ol {
  list-style-type: decimal;
}
.prose ul li,
.prose ol li {
  margin: 0.5rem 0;
  line-height: 1.75;
}
.prose ul li::marker,
.prose ol li::marker {
  color: var(--seal-red);
}
.prose ul ul,
.prose ul ol,
.prose ol ul,
.prose ol ol {
  margin: 0.5rem 0;
}
.prose hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2rem 0;
}
.prose code {
  padding: 0.125rem 0.375rem;
  background-color: var(--paper-white);
  color: var(--seal-red-dark);
  border-radius: 0.25rem;
  font-size: 0.875em;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
.prose pre {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background-color: #1e1e1e;
  color: #d4d4d4;
  border-radius: 0.5rem;
  overflow-x: auto;
  line-height: 1.6;
}
.prose pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: 0.875rem;
  border-radius: 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}
.prose table thead th {
  background-color: var(--paper-white);
  border: 1px solid var(--border-color);
  padding: 0.625rem 0.875rem;
  font-weight: 700;
  color: var(--ink-black);
  text-align: left;
}
.prose table tbody td {
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.875rem;
  color: var(--text-primary);
}
.prose table tbody tr:nth-child(even) td {
  background-color: rgba(245, 240, 232, 0.4);
}
.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  margin: 1.5rem 0;
  display: block;
}
.prose figure {
  margin: 1.5rem 0;
}
.prose figure img {
  margin: 0;
}
.prose figcaption {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
}
.prose video {
  max-width: 100%;
  border-radius: 0.5rem;
  margin: 1.5rem 0;
}
.prose sup,
.prose sub {
  font-size: 0.75em;
}
.prose sup {
  vertical-align: super;
}
.prose sub {
  vertical-align: sub;
}
.prose abbr[title] {
  text-decoration: underline dotted;
  cursor: help;
}

/* 响应式：prose 在小屏下调整字号 */
@media (max-width: 768px) {
  .prose {
    font-size: 0.95rem;
  }
  .prose h1 {
    font-size: 1.75rem;
  }
  .prose h2 {
    font-size: 1.4rem;
  }
  .prose h3 {
    font-size: 1.15rem;
  }
  .grid-cell {
    width: 150px;
    height: 150px;
  }
  .grid-cell .grid-char {
    font-size: 100px;
  }
}