/**
 * notes-index.css - 笔记索引页专属样式（视觉升级层）
 * 作用域：body.notes-index-page，不影响其他页面
 *
 * 依赖加载顺序（notes.html 中并行 link）：
 *   base.css → components.css → layout.css → notes.css → responsive.css → notes-index.css
 */

/* ========================
   页面级变量与背景
   ======================== */
.notes-index-page {
  --nip-grid-line: rgba(255, 255, 255, 0.03);
  --nip-blob: color-mix(in srgb, var(--primary) 12%, transparent);
}

body[data-theme='light'].notes-index-page {
  --nip-grid-line: rgba(15, 23, 42, 0.045);
  --nip-blob: color-mix(in srgb, var(--primary) 8%, transparent);
}

/* ========================
   顶部动态导航
   ======================== */
.notes-index-page .notes-navbar {
  justify-content: flex-start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2rem);
  gap: 0.55rem;
}

.notes-index-page .notes-navbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 0.2s ease, transform 0.2s ease;
}

.notes-index-page .notes-navbar__brand:hover {
  color: var(--primary);
  transform: translateY(-1px);
}

.notes-index-page .notes-navbar__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--glass-border));
  border-radius: 50%;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  font-size: 0.82rem;
  font-weight: 900;
  box-shadow: 0 0 16px color-mix(in srgb, var(--primary) 12%, transparent);
}

.notes-index-page .notes-navbar__home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.05rem;
  margin-left: auto;
  padding: 0 0.72rem;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, var(--glass-border));
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  background: color-mix(in srgb, var(--surface-elevated) 72%, transparent);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.12);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.notes-index-page .notes-navbar__home:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 50%, var(--glass-border));
  background: color-mix(in srgb, var(--primary) 9%, var(--surface-elevated));
  transform: translateY(-1px);
  box-shadow: 0 7px 18px rgba(0, 217, 255, 0.1);
}

.notes-index-page .notes-navbar__home i {
  font-size: 0.76rem;
}

/* notes navbar 中的 widget 按钮 — 复用基础样式，仅调整间距 */
.notes-index-page .notes-navbar .negiao-lang-toggle--nav {
  margin-left: 0.3rem;
}

@media (max-width: 576px) {
  .notes-index-page .notes-navbar {
    height: 3.5rem;
    padding: 0 0.75rem;
    gap: 0.42rem;
  }

  .notes-index-page .notes-navbar__brand-text {
    display: none;
  }

  .notes-index-page .notes-navbar__brand-mark,
  .notes-index-page .notes-navbar__home {
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    min-height: 2rem;
  }

  .notes-index-page .notes-navbar__home {
    padding: 0;
  }

  .notes-index-page .notes-navbar__home span {
    display: none;
  }

  .notes-index-page .notes-navbar .negiao-lang-toggle--nav {
    font-size: 0.62rem;
    padding: 0 0.5rem;
  }
}

@media (max-width: 420px) {
  .notes-index-page .notes-navbar .share-note-btn {
    display: none;
  }
}

/* 顶部氛围：网格底纹 + 单个极光色斑（静态，零持续开销） */
.notes-index-page::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60vh;
  pointer-events: none;
  z-index: -1;
  background-image:
    radial-gradient(ellipse 640px 380px at 78% -8%, var(--nip-blob) 0%, transparent 68%),
    linear-gradient(var(--nip-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--nip-grid-line) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
  -webkit-mask-image: linear-gradient(#000 45%, transparent);
  mask-image: linear-gradient(#000 45%, transparent);
}

/* ========================
   通用（原 style-new.css 尾部规则的本页副本）
   ======================== */
.notes-index-page .section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.notes-index-page .notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.notes-index-page .footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  background: var(--background-secondary);
}

.notes-index-page * {
  scrollbar-width: thin;
  scrollbar-color: var(--border) var(--background-secondary);
}

/* ========================
   页头
   ======================== */
.notes-index-page .page-head {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.notes-index-page .page-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--primary);
  margin: 0 0 var(--space-sm);
}

.notes-index-page .page-head__eyebrow::before,
.notes-index-page .page-head__eyebrow::after {
  content: '';
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary));
}

.notes-index-page .page-head__eyebrow::after {
  background: linear-gradient(90deg, var(--primary), transparent);
}

.notes-index-page .page-head__title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 14px color-mix(in srgb, var(--primary) 22%, transparent));
}

.notes-index-page .page-head__sub {
  color: var(--text-muted);
  font-size: 1rem;
  margin: 0;
}

/* ========================
   工具栏：搜索 + 分类筛选
   ======================== */
.notes-index-page .notes-toolbar {
  max-width: 880px;
  margin: 0 auto var(--space-3xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.notes-index-page .notes-search {
  position: relative;
  width: min(480px, 100%);
}

.notes-index-page .notes-search i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-disabled);
  font-size: 0.85rem;
  pointer-events: none;
}

.notes-index-page .notes-search__input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.7rem 2.6rem;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--text);
  font-size: 0.9rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.notes-index-page .notes-search__input::placeholder {
  color: var(--text-disabled);
}

.notes-index-page .notes-search__input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--primary) 55%, transparent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
}

.notes-index-page .notes-search__clear {
  position: absolute;
  right: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: none;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--text-disabled);
  cursor: pointer;
  font-size: 0.8rem;
}

.notes-index-page .notes-search__clear:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--text-disabled) 18%, transparent);
}

.notes-index-page .notes-search.has-value .notes-search__clear {
  display: inline-flex;
}

.notes-index-page .notes-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.notes-index-page .filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.95rem;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: var(--text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.notes-index-page .filter-chip:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--primary) 40%, transparent);
  transform: translateY(-1px);
}

.notes-index-page .filter-chip.is-active {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 55%, transparent);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  font-weight: 600;
}

.notes-index-page .filter-chip__count {
  font-size: 0.72rem;
  color: var(--text-disabled);
}

.notes-index-page .filter-chip.is-active .filter-chip__count {
  color: color-mix(in srgb, var(--primary) 75%, var(--text));
}

/* ========================
   分类区头
   ======================== */
.notes-index-page .notes-category {
  margin-bottom: var(--space-3xl);
}

.notes-index-page .notes-section-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-bottom: 0;
  border-bottom: none;
}

.notes-index-page .notes-section-title i {
  flex: none;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--primary) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent);
  color: var(--primary);
  font-size: 1rem;
}

.notes-index-page .notes-section-title .cat-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-disabled);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.18rem 0.6rem;
}

.notes-index-page .notes-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

/* ========================
   笔记卡片精修
   ======================== */
.notes-index-page .note-card {
  display: flex;
  flex-direction: column;
  isolation: isolate;
}

.notes-index-page .note-card::before {
  height: 2px;
}

.notes-index-page .note-icon {
  font-size: 1.6rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--surface-elevated) 85%, var(--primary) 15%);
  border: 1px solid var(--glass-border);
  transition: transform 0.22s ease;
}

.notes-index-page .note-card:hover .note-icon {
  transform: scale(1.08) rotate(-4deg);
}

.notes-index-page .note-card__header {
  margin-bottom: var(--space-md);
}

.notes-index-page .note-card__header h3 {
  font-size: 1.12rem;
  line-height: 1.35;
  margin-bottom: 0.4rem;
  transition: color 0.22s ease;
}

.notes-index-page .note-card:hover .note-card__header h3 {
  color: var(--primary);
}

.notes-index-page .note-card__description {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.9em;
}

.notes-index-page .note-card__meta {
  margin-top: auto;
  margin-bottom: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px dashed color-mix(in srgb, var(--border) 70%, transparent);
}

.notes-index-page .note-meta__item {
  font-size: 0.78rem;
}

.notes-index-page .note-meta__item i {
  color: var(--primary);
  opacity: 0.7;
}

.notes-index-page .note-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: 0;
}

.notes-index-page .note-card__actions .btn {
  padding: 0.5rem 1rem;
  font-size: 0.82rem;
}

/* 筛选状态 */
.notes-index-page .note-card.is-filtered {
  display: none;
}

.notes-index-page .notes-category.is-empty {
  display: none;
}

/* 无结果提示 */
.notes-index-page .notes-empty {
  display: none;
  text-align: center;
  color: var(--text-muted);
  padding: var(--space-3xl) 0;
}

.notes-index-page .notes-empty.is-visible {
  display: block;
}

.notes-index-page .notes-empty i {
  font-size: 2rem;
  color: var(--text-disabled);
  margin-bottom: var(--space-md);
  display: block;
}

/* 卡片入场（由 JS 添加 .is-revealed） */
.notes-index-page .note-card {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.4s ease, transform 0.4s ease,
    border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.notes-index-page .note-card.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========================
   使用说明 + 统计
   ======================== */
.notes-index-page .notes-info {
  margin-bottom: var(--space-3xl);
}

.notes-index-page .notes-info h2 {
  font-size: 1.45rem;
}

.notes-index-page .info-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.notes-index-page .info-item:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 35%, transparent);
}

.notes-index-page .notes-stats {
  border-top: 1px solid var(--border);
  padding-top: var(--space-2xl);
}

.notes-index-page .stats-item h3 {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ========================
   响应式
   ======================== */
@media (max-width: 768px) {
  .notes-index-page .section {
    padding: var(--space-2xl) 0;
  }

  .notes-index-page .page-head {
    margin-top: var(--space-xl);
  }

  .notes-index-page .notes-toolbar {
    margin-bottom: var(--space-2xl);
  }

  .notes-index-page .notes-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

/* ========================
   动效偏好
   ======================== */
@media (prefers-reduced-motion: reduce) {
  .notes-index-page .note-card {
    opacity: 1 !important;
    transform: none !important;
    transition: none;
  }
}