/* =====================================================================
   Evelina's Personal Web — 主题样式增强
   基色 deep purple，配合紫粉渐变与柔光，深浅色自适应
   ===================================================================== */

/* ==================== CSS 变量：品牌色系 ==================== */
:root {
  --evelina-purple:    #7c3aed;
  --evelina-purple-2:  #9333ea;
  --evelina-pink:      #ec4899;
  --evelina-indigo:    #6366f1;
  --evelina-grad:      linear-gradient(135deg, #7c3aed 0%, #9333ea 45%, #ec4899 100%);
  --evelina-grad-soft: linear-gradient(135deg, rgba(124,58,237,.10), rgba(236,72,153,.10));
  --evelina-shadow:   0 8px 30px rgba(124, 58, 237, 0.12);
  --evelina-shadow-sm: 0 2px 10px rgba(124, 58, 237, 0.08);
  --evelina-radius:    14px;
}

[data-md-color-scheme="slate"] {
  --evelina-grad-soft: linear-gradient(135deg, rgba(124,58,237,.18), rgba(236,72,153,.14));
  --evelina-shadow:    0 8px 30px rgba(0, 0, 0, 0.35);
  --evelina-shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.30);
}

/* ==================== 顶部标题栏：渐变品牌色 ==================== */
.md-header {
  background: var(--evelina-grad);
  box-shadow: 0 2px 14px rgba(124, 58, 237, 0.25);
}
.md-header__title {
  font-weight: 700;
  letter-spacing: 0.3px;
}
.md-header__topic:first-child {
  font-weight: 700;
}

/* 顶部 header 的"编辑本页"等按钮 hover */
.md-header__button:hover {
  opacity: 0.85;
}

/* ==================== 侧边栏导航 ==================== */
.md-nav {
  font-size: 0.78rem;
}
.md-nav__item {
  margin: 1px 0;
}
.md-nav__link {
  border-radius: 8px;
  transition: background-color 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
  margin: 0 6px;
  padding: 6px 12px;
}
.md-nav__link:hover,
.md-nav__link--active {
  background: var(--evelina-grad-soft);
}
.md-nav__link--active {
  font-weight: 600;
  color: var(--evelina-purple);
}
[data-md-color-scheme="slate"] .md-nav__link--active {
  color: #c4b5fd;
}

/* 折叠小三角的过渡 */
.md-nav__toggle ~ .md-nav .md-nav__item {
  transition: opacity 0.25s ease;
}

/* ==================== 正文区域：标题装饰 ==================== */
.md-typeset h1 {
  border-bottom: 3px solid transparent;
  border-image: var(--evelina-grad) 1;
  padding-bottom: 0.4em;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.md-typeset h2 {
  position: relative;
  padding-bottom: 0.25em;
  padding-left: 0.2em;
  border-bottom: 2px solid rgba(124, 58, 237, 0.14);
  font-weight: 700;
}
.md-typeset h2::before {
  content: "";
  position: absolute;
  left: -0.55em;
  top: 0.15em;
  width: 5px;
  height: 1.1em;
  border-radius: 3px;
  background: var(--evelina-grad);
}
.md-typeset h3 {
  font-weight: 700;
  color: var(--evelina-purple);
}
[data-md-color-scheme="slate"] .md-typeset h3 {
  color: #c4b5fd;
}

/* 链接 */
.md-typeset a {
  text-decoration: none;
  border-bottom: 1px dashed rgba(124, 58, 237, 0.35);
  transition: color 0.2s ease, border-bottom-color 0.2s ease;
}
.md-typeset a:hover {
  color: var(--evelina-pink);
  border-bottom: 1px solid var(--evelina-pink);
}

/* ==================== 引用块 / 提示框 ==================== */
.md-typeset blockquote {
  border-left: 4px solid var(--evelina-purple);
  background: var(--evelina-grad-soft);
  border-radius: 0 12px 12px 0;
  padding: 0.6em 1em;
  box-shadow: var(--evelina-shadow-sm);
}

/* admonition 提示框标题渐变 */
.md-typeset .admonition {
  border-radius: var(--evelina-radius);
  box-shadow: var(--evelina-shadow-sm);
  border: none;
  border-left: 4px solid var(--evelina-purple);
}
.md-typeset .admonition-title {
  background: var(--evelina-grad-soft);
  border-radius: var(--evelina-radius) var(--evelina-radius) 0 0;
  font-weight: 700;
}

/* ==================== 代码块美化 ==================== */
.md-typeset code {
  border-radius: 6px;
  padding: 0.1em 0.4em;
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.10);
}
[data-md-color-scheme="slate"] .md-typeset code {
  background: rgba(196, 181, 253, 0.10);
  border-color: rgba(196, 181, 253, 0.12);
}

/* 代码块容器 */
.md-typeset pre > code {
  background: transparent;
  border: none;
  padding: 0;
}
.md-typeset pre {
  border-radius: var(--evelina-radius);
  box-shadow: var(--evelina-shadow);
  border: 1px solid rgba(124, 58, 237, 0.08);
}
/* 行号列 */
.md-typeset pre > code .linenos {
  color: rgba(124, 58, 237, 0.45);
  border-right: 1px solid rgba(124, 58, 237, 0.12);
  padding-right: 0.8em;
}

/* 复制按钮 hover */
.md-clipboard {
  color: rgba(124, 58, 237, 0.55);
  transition: color 0.2s ease, transform 0.2s ease;
}
.md-clipboard:hover {
  color: var(--evelina-pink);
  transform: scale(1.1);
}

/* ==================== 表格美化 ==================== */
.md-typeset table:not([class]) {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--evelina-shadow-sm);
  border: 1px solid rgba(124, 58, 237, 0.10);
}
.md-typeset table:not([class]) th {
  background: var(--evelina-grad);
  color: #fff;
  font-weight: 700;
  border: none;
}
.md-typeset table:not([class]) td {
  border-top: 1px solid rgba(124, 58, 237, 0.08);
}
.md-typeset table:not([class]) tr:hover td {
  background: var(--evelina-grad-soft);
  transition: background 0.2s ease;
}

/* ==================== 图片美化 ==================== */
.md-typeset img {
  border-radius: 10px;
  box-shadow: var(--evelina-shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.md-typeset img:hover {
  transform: scale(1.01);
  box-shadow: var(--evelina-shadow);
}

/* ==================== 滚动条美化 ==================== */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(124, 58, 237, 0.4) transparent;
}
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

/* ==================== PDF 预览 ==================== */
.evelina-pdf-preview {
  margin: 1.25rem 0;
  overflow: hidden;
  border: 1px solid rgba(124, 58, 237, 0.14);
  border-radius: var(--evelina-radius);
  background: var(--md-default-bg-color);
  box-shadow: var(--evelina-shadow-sm);
}

.evelina-pdf-preview__frame {
  display: block;
  width: 100%;
  height: min(76vh, 48rem);
  min-height: 28rem;
  border: 0;
  background: #fff;
}

.evelina-pdf-preview__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0.75rem;
  border-top: 1px solid rgba(124, 58, 237, 0.12);
  background: var(--evelina-grad-soft);
}

.evelina-pdf-preview__actions a {
  border: 0;
  border-radius: 8px;
  padding: 0.4rem 0.65rem;
  background: var(--evelina-purple);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
}

.evelina-pdf-preview__actions a:hover {
  color: #fff;
  filter: brightness(1.06);
}

@media screen and (max-width: 44.9375em) {
  .evelina-pdf-preview__frame {
    height: 70vh;
    min-height: 22rem;
  }
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--evelina-purple), var(--evelina-pink));
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--evelina-purple-2), var(--evelina-pink));
  background-clip: padding-box;
}

/* ==================== 选中文字 ==================== */
::selection {
  background: rgba(236, 72, 153, 0.25);
  color: inherit;
}

/* ==================== 返回顶部按钮 ==================== */
.md-top {
  background: var(--evelina-grad);
  box-shadow: var(--evelina-shadow);
  border-radius: 50px;
}

/* ==================== 页脚 ==================== */
.md-footer {
  background: var(--evelina-grad);
}
.md-footer-meta {
  background: rgba(0, 0, 0, 0.15);
}
.md-footer__link:hover {
  opacity: 0.85;
}

/* ==================== 首页专用：Hero & 卡片 ==================== */
.evelina-hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
  margin-bottom: 2rem;
}
.evelina-hero__avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 1.2rem;
  border-radius: 50%;
  background: var(--evelina-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.6rem;
  color: #fff;
  box-shadow: var(--evelina-shadow);
  animation: evelina-float 4s ease-in-out infinite;
}
.evelina-hero__title {
  font-size: 2.4rem;
  font-weight: 800;
  margin: 0.2em 0;
  background: var(--evelina-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}
.evelina-hero__subtitle {
  font-size: 1.05rem;
  opacity: 0.75;
  margin: 0.3em auto 1.4rem;
  max-width: 38em;
  line-height: 1.7;
}
.evelina-hero__tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.evelina-tag {
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--evelina-grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.18);
  color: var(--evelina-purple);
}
[data-md-color-scheme="slate"] .evelina-tag {
  color: #d8b4fe;
}

/* 课程卡片网格 */
.evelina-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 2rem 0;
}
.evelina-card {
  display: block;
  text-decoration: none !important;
  border: 1px solid rgba(124, 58, 237, 0.12);
  border-radius: var(--evelina-radius);
  padding: 1.2rem 1.1rem;
  background: var(--evelina-grad-soft);
  box-shadow: var(--evelina-shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}
.evelina-card::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -30%;
  width: 120px;
  height: 120px;
  background: var(--evelina-grad);
  opacity: 0.10;
  border-radius: 50%;
  transition: transform 0.4s ease, opacity 0.4s ease;
}
.evelina-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--evelina-shadow);
  border-color: rgba(124, 58, 237, 0.30);
}
.evelina-card:hover::after {
  transform: scale(1.6);
  opacity: 0.16;
}
.evelina-card__icon {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  display: block;
}
.evelina-card__title {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0 0 0.3em;
  color: var(--md-typeset-color) !important;
  border: none !important;
}
.evelina-card__desc {
  font-size: 0.85rem;
  opacity: 0.65;
  line-height: 1.5;
  border: none !important;
}

/* 信息条 */
.evelina-info {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  justify-content: center;
  margin: 1.5rem 0;
  padding: 1rem 1.4rem;
  border-radius: var(--evelina-radius);
  background: var(--evelina-grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.12);
}
.evelina-info__item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
}
.evelina-info__item b {
  color: var(--evelina-purple);
}
[data-md-color-scheme="slate"] .evelina-info__item b {
  color: #d8b4fe;
}

/* 浮动动画 */
@keyframes evelina-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* ==================== 页面互动栏（阅读计数 + 点赞） ==================== */
.interaction-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding: 14px 24px;
  border-radius: var(--evelina-radius);
  background: var(--evelina-grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.15);
  transition: all 0.3s ease;
}
.interaction-bar:hover {
  border-color: rgba(124, 58, 237, 0.30);
  box-shadow: var(--evelina-shadow-sm);
}
.interaction-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 10px;
  transition: all 0.25s ease;
  font-size: 0.9rem;
  color: var(--md-typeset-color);
  user-select: none;
}
.interaction-likes:hover { background: rgba(124, 58, 237, 0.08); }
.interaction-likes:active { transform: scale(0.92); }
.interaction-likes.liked-flash { background: rgba(236, 72, 153, 0.14); }
.interaction-icon { font-size: 1.1rem; line-height: 1; transition: transform 0.2s ease; display: inline-block; }
.interaction-label { opacity: 0.75; font-size: 0.82rem; }
.interaction-number {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--evelina-purple);
  min-width: 2ch;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
[data-md-color-scheme="slate"] .interaction-number { color: #c4b5fd; }

/* ==================== Giscus 评论区 ==================== */
#giscus-comments {
  margin-top: 2.5rem;
  margin-bottom: 1.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid rgba(124, 58, 237, 0.14);
}
.giscus,
.giscus-frame {
  width: 100% !important;
  max-width: 100% !important;
}

/* ==================== 阅读进度条（顶部） ==================== */
.evelina-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 1000;
  background: var(--evelina-grad);
  box-shadow: 0 0 8px rgba(236, 72, 153, 0.6);
  transition: width 0.1s linear;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .evelina-hero__title { font-size: 1.8rem; }
  .evelina-hero__avatar { width: 76px; height: 76px; font-size: 2rem; }
}
@media (max-width: 500px) {
  .interaction-bar { flex-direction: column; gap: 8px; padding: 10px 18px; }
  .evelina-info { flex-direction: column; gap: 6px; }
}