/*
 * ============================================
 *  kayhs's Blog — Custom Theme
 *  陶土暖调 · 呼吸感排版 · 细微动感
 * ============================================
 */

/* ========================================
   CSS 自定义属性 — 配色、字体、间距
   ======================================== */

:root {
  /* 覆盖 Fluid 主题变量 */
  --body-bg-color: #faf7f4;
  --navbar-bg-color: rgba(255, 252, 250, 0.92);
  --navbar-text-color: #4a3f3a;
  --text-color: #3d3630;
  --sec-text-color: #8c7e72;
  --board-color: #fffdfb;
  --post-text-color: #3d3630;
  --post-heading-color: #2a221e;
  --post-link-color: #c47a5a;
  --link-hover-color: #d4845a;
  --link-hover-bg-color: rgba(196, 122, 90, 0.07);
  --line-color: #e8e0d8;
  --scrollbar-color: #d4c8bc;
  --scrollbar-hover-color: #b8a898;
  --button-bg-color: transparent;
  --button-hover-bg-color: #f5ede5;

  /* 陶土强调色系 */
  --kayhs-terracotta: #c47a5a;
  --kayhs-terracotta-light: #d4946a;
  --kayhs-terracotta-subtle: rgba(196, 122, 90, 0.08);
  --kayhs-cream: #fdf8f3;
  --kayhs-warm-shadow: 0 2px 16px rgba(60, 30, 15, 0.06);
  --kayhs-warm-shadow-hover: 0 4px 24px rgba(60, 30, 15, 0.10);
  --kayhs-border: 1px solid #e8e0d8;
}

/* 暗色模式 */
html[data-user-color-scheme="dark"] {
  --body-bg-color: #1a1c22;
  --navbar-bg-color: rgba(26, 28, 34, 0.94);
  --navbar-text-color: #d0cec8;
  --text-color: #d0cec8;
  --sec-text-color: #8c887e;
  --board-color: #23252d;
  --post-text-color: #d0cec8;
  --post-heading-color: #e8e4dc;
  --post-link-color: #d4946a;
  --link-hover-color: #e0a878;
  --link-hover-bg-color: rgba(212, 148, 106, 0.10);
  --line-color: #383a3e;
  --scrollbar-color: #404248;
  --scrollbar-hover-color: #585a5e;
  --button-hover-bg-color: #2e2f35;
  --kayhs-terracotta: #d4946a;
  --kayhs-terracotta-light: #e0a878;
  --kayhs-terracotta-subtle: rgba(212, 148, 106, 0.10);
  --kayhs-cream: #26282e;
  --kayhs-warm-shadow: 0 2px 16px rgba(0, 0, 0, 0.20);
  --kayhs-warm-shadow-hover: 0 4px 24px rgba(0, 0, 0, 0.30);
  --kayhs-border: 1px solid #383a3e;
}


/* ========================================
   全局排版
   ======================================== */

html {
  font-size: 17px;
}

body {
  font-family: "Noto Sans SC", "LXGW WenKai", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 标题用衬线体，有性格 */
h1, h2, h3, h4, h5, h6 {
  font-family: "Noto Serif SC", "思源宋体", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

h1 { font-size: 2rem; letter-spacing: 0.06em; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

/* 正文呼吸感 */
p {
  margin-bottom: 1.2em;
}

/* ::selection 陶土色高亮 */
::selection {
  background: rgba(196, 122, 90, 0.22);
  color: inherit;
}

::-moz-selection {
  background: rgba(196, 122, 90, 0.22);
  color: inherit;
}


/* ========================================
   导航栏 — 干净温润
   ======================================== */

.navbar {
  background: var(--navbar-bg-color) !important;
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: 0 1px 0 var(--line-color);
  border-bottom: none;
}

.navbar .navbar-brand {
  font-family: "Noto Serif SC", Georgia, serif !important;
  font-weight: 700 !important;
  font-size: 1.3rem !important;
  letter-spacing: 0.08em !important;
  color: var(--kayhs-terracotta) !important;
}

.navbar .nav-link {
  font-size: 0.9rem !important;
  letter-spacing: 0.03em;
  font-weight: 400 !important;
  color: var(--sec-text-color) !important;
  transition: color 0.25s ease !important;
}

.navbar .nav-link:hover {
  color: var(--kayhs-terracotta) !important;
}

.navbar .nav-link.active {
  color: var(--kayhs-terracotta) !important;
  font-weight: 500 !important;
}


/* ========================================
   Banner — CSS 渐变替代图片，独一无二
   ======================================== */

#banner {
  background: linear-gradient(160deg,
    #f5e6d8 0%,
    #edd5c0 15%,
    #e8ccb0 30%,
    #f0dac8 50%,
    #f5e6d8 70%,
    #ead8c8 85%,
    #f0ddd0 100%
  ) !important;
  background-size: 400% 400% !important;
  animation: kayhs-banner-drift 24s ease-in-out infinite !important;
}

[data-user-color-scheme="dark"] #banner {
  background: linear-gradient(160deg,
    #2a241e 0%,
    #332820 20%,
    #3d3024 40%,
    #342a22 60%,
    #2e261e 80%,
    #352c22 100%
  ) !important;
  background-size: 400% 400% !important;
  animation: kayhs-banner-drift 24s ease-in-out infinite !important;
}

@keyframes kayhs-banner-drift {
  0%, 100% { background-position: 0% 50%; }
  25%      { background-position: 100% 0%; }
  50%      { background-position: 50% 100%; }
  75%      { background-position: 0% 50%; }
}

/* 覆盖 black mask — 用更柔和的暖调遮罩 */
#banner:after,
.banner-mask {
  background: rgba(40, 20, 10, 0.15) !important;
}

[data-user-color-scheme="dark"] #banner:after,
[data-user-color-scheme="dark"] .banner-mask {
  background: rgba(10, 8, 6, 0.45) !important;
}

/* 首页 banner 内标题 */
#banner .banner-title {
  font-family: "Noto Serif SC", Georgia, serif !important;
  font-weight: 700 !important;
  letter-spacing: 0.10em !important;
}

/* 副标题打字效果 */
#banner #subtitle,
#banner .subtitle {
  font-family: "LXGW WenKai", "Noto Serif SC", serif !important;
  font-weight: 400 !important;
  font-style: italic;
  letter-spacing: 0.06em;
  opacity: 0.88;
}


/* ========================================
   文章卡片 — 微妙阴影 & 悬浮感
   ======================================== */

.index-card,
.post-list .post-item,
#board article {
  background: var(--board-color);
  border-radius: 10px !important;
  border: var(--kayhs-border);
  box-shadow: var(--kayhs-warm-shadow);
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
  margin-bottom: 1.8rem;
  padding: 1.8rem 2rem;
}

.index-card:hover,
.post-list .post-item:hover {
  box-shadow: var(--kayhs-warm-shadow-hover);
  transform: translateY(-2px);
  border-color: #e0d2c4;
}

/* 文章卡片内的标题 */
.index-card .post-title a,
.post-list .post-title a {
  font-family: "Noto Serif SC", Georgia, serif !important;
  font-weight: 600;
  color: var(--post-heading-color) !important;
  transition: color 0.25s ease;
  background: none !important;
}

.index-card .post-title a:hover,
.post-list .post-title a:hover {
  color: var(--kayhs-terracotta) !important;
}

/* 摘要文字 */
.index-card .post-excerpt,
.index-card .post-content {
  color: var(--sec-text-color);
  font-size: 0.95rem;
  line-height: 1.85;
}


/* ========================================
   链接 — 陶土色底线生长动画
   ======================================== */

/* 正文内链接 */
article a,
.post-content a,
#board a {
  color: var(--post-link-color) !important;
  text-decoration: none;
  background-image: linear-gradient(var(--kayhs-terracotta), var(--kayhs-terracotta));
  background-size: 0% 1px;
  background-position: 0% 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease, color 0.25s ease;
  padding-bottom: 1px;
}

article a:hover,
.post-content a:hover,
#board a:hover {
  background-size: 100% 1px;
  color: var(--link-hover-color) !important;
}

/* 但保留导航链接不受影响 */
.navbar a,
.nav-link,
footer a,
.pagination a,
#toc a,
.category-bar a,
.tagcloud a {
  background-image: none !important;
  background-size: auto !important;
  padding-bottom: 0 !important;
}


/* ========================================
   代码块 — 圆角轻柔
   ======================================== */

figure.highlight,
pre {
  border-radius: 8px !important;
  border: var(--kayhs-border);
  box-shadow: none;
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", "SF Mono", "Consolas", monospace;
  font-size: 0.88rem;
}

/* 行内代码 */
code:not(pre code):not(figure code) {
  background: var(--kayhs-terracotta-subtle);
  color: var(--kayhs-terracotta);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;
}


/* ========================================
   Tag / Category 标签 — 温润小豆
   ======================================== */

.tag-list .tag-item a,
.post-meta .tag a,
.post-meta .category a {
  display: inline-block;
  background: var(--kayhs-terracotta-subtle);
  color: var(--kayhs-terracotta) !important;
  border-radius: 20px;
  padding: 0.15em 0.8em;
  font-size: 0.8rem;
  font-weight: 450;
  letter-spacing: 0.02em;
  transition: background 0.25s ease, color 0.25s ease;
  margin: 0 0.3em 0.3em 0;
}

.tag-list .tag-item a:hover,
.post-meta .tag a:hover,
.post-meta .category a:hover {
  background: var(--kayhs-terracotta);
  color: #fff !important;
}


/* ========================================
   Copyright & Prev/Next — 精致分割
   ======================================== */

.post-copyright {
  border-left: 3px solid var(--kayhs-terracotta) !important;
  background: var(--kayhs-cream) !important;
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.2rem;
  font-size: 0.88rem;
}

.prev-next .prev,
.prev-next .next {
  font-size: 0.9rem;
}

.prev-next a:hover {
  color: var(--kayhs-terracotta) !important;
}


/* ==========================================
   页脚 — 简洁署名
   ======================================== */

footer {
  color: var(--sec-text-color);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  padding: 2rem 0;
  border-top: var(--kayhs-border);
  margin-top: 3rem;
}

footer a {
  color: var(--sec-text-color) !important;
  transition: color 0.25s ease;
}

footer a:hover {
  color: var(--kayhs-terracotta) !important;
}


/* ========================================
   滚动条 — 温润色调
   ======================================== */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-color);
  border-radius: 6px;
}

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


/* ========================================
   回到顶部按钮
   ======================================== */

#scroll-top-button {
  background: var(--board-color) !important;
  border: var(--kayhs-border);
  border-radius: 50%;
  box-shadow: var(--kayhs-warm-shadow);
  color: var(--kayhs-terracotta) !important;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

#scroll-top-button:hover {
  box-shadow: var(--kayhs-warm-shadow-hover);
  transform: translateY(-3px);
}


/* ========================================
   关于页 — 个性化布局
   ======================================== */

.about-avatar img {
  border-radius: 50%;
  border: 3px solid var(--kayhs-terracotta-subtle);
  box-shadow: var(--kayhs-warm-shadow);
}

.about-info .about-name {
  font-family: "Noto Serif SC", Georgia, serif !important;
  font-weight: 700 !important;
  font-size: 1.8rem !important;
  letter-spacing: 0.06em;
}

.about-info .about-intro {
  color: var(--sec-text-color);
  font-size: 1rem;
  line-height: 1.8;
}


/* ========================================
   TOC / 目录
   ======================================== */

#toc {
  border-left: 2px solid var(--line-color);
  padding-left: 1rem;
}

#toc .toc-link {
  font-size: 0.88rem;
  color: var(--sec-text-color) !important;
  transition: color 0.2s ease;
}

#toc .toc-link:hover,
#toc .toc-link.is-active-link {
  color: var(--kayhs-terracotta) !important;
}


/* ========================================
   进度条
   ======================================== */

#nprogress .bar {
  background: var(--kayhs-terracotta) !important;
}

#nprogress .peg {
  box-shadow: 0 0 10px var(--kayhs-terracotta), 0 0 5px var(--kayhs-terracotta-light) !important;
}


/* ========================================
   移动端微调
   ======================================== */

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .index-card,
  .post-list .post-item {
    padding: 1.2rem 1rem;
    border-radius: 8px !important;
    margin-bottom: 1.2rem;
  }

  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
}