/* ============================================================
   Emu 的练功房 —— 设计变量集中在此文件
   换皮时只改 :root 里的变量与少量组件色值，不改页面结构
   ============================================================ */

:root {
  /* 底色 —— 页面浅灰，卡片纯白，靠明度差分层 */
  --bg: #ffffff;
  --bg-page: #ededee;
  --bg-elev: #fafafa;
  --bg-elev-2: #f2f2f3;
  --border: #e8e8ea;
  --border-strong: #d6d6da;

  /* 文字 —— 近黑，避开纯黑的硬边 */
  --fg: #1f2023;
  --fg-strong: #0d0e10;
  --fg-dim: #5f6368;
  --fg-faint: #9195a0;

  /* 强调 —— 中性黑，靠字重与下划线做区分，不用彩色抢戏 */
  --accent: #1a1a1a;
  --accent-dim: #6b6b6b;
  --ok: #3f7a4a;
  --warn: #8a6a2f;
  --danger: #a03b36;

  /* 排版 */
  --font-sans: "Inter", "Noto Sans SC", "Source Han Sans SC", system-ui,
    -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  /* 标题用系统衬线，不加载任何 web font —— 零请求 */
  --font-serif: "Palatino Linotype", Palatino, Georgia, "Songti SC", "SimSun",
    "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, "SFMono-Regular",
    "Cascadia Code", Consolas, monospace;

  --measure: 64ch;
  --page-pad: clamp(1.15rem, 5vw, 2.75rem);
  /* 卡片圆角。整站唯一的「软」—— 其余全部直角 */
  --radius-card: 18px;
  --radius: 3px;
  --radius-sm: 2px;

  --shadow: none;
  --shadow-card: 0 1px 2px rgba(16, 18, 24, 0.04),
    0 10px 30px -18px rgba(16, 18, 24, 0.22);
  --shadow-card-hover: 0 2px 4px rgba(16, 18, 24, 0.05),
    0 18px 44px -20px rgba(16, 18, 24, 0.28);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 基础 ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.8;
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

::selection {
  background: #efe3d4;
  color: var(--fg-strong);
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 0.22em;
  transition: color 0.15s var(--ease);
}

a:hover {
  color: var(--fg-strong);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* ---------- 布局 ---------- */

.wrap {
  width: 100%;
  max-width: 1560px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 3.2vw, 2.6rem);
}

.wrap--narrow {
  max-width: 780px;
}

/* 主体两栏：左文章流，右侧栏 */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.layout--with-side {
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(1rem, 1.6vw, 1.5rem);
}

.layout__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.layout__side {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  position: sticky;
  top: 5.6rem;
}

main {
  flex: 1;
  padding-block: clamp(1rem, 2vw, 1.6rem) 4rem;
}

/* ---------- 页头：独立圆角横幅 ---------- */

.site-header {
  background: var(--bg-page);
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: clamp(0.8rem, 1.6vw, 1.25rem);
}

.site-header__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.85rem clamp(1.1rem, 2.4vw, 2rem);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 1px 2px rgba(16, 18, 24, 0.03),
    0 12px 30px -22px rgba(16, 18, 24, 0.35);
}

.site-title {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 1.6vw, 1.45rem);
  font-weight: 400;
  letter-spacing: 0.005em;
  color: var(--fg-strong);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  white-space: nowrap;
}

.site-title:hover {
  text-decoration: none;
  color: var(--accent);
}

.site-title__mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #f2e4dd;
  display: inline-block;
  flex: none;
}

.site-sub {
  color: var(--fg-faint);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--fg-dim);
}

.site-nav a:hover {
  color: var(--fg-strong);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--fg-strong);
}

/* 当前栏目：底部一条短横线，参照 Vei Blog 的导航指示 */
.site-nav a:not(.nav-lock)[aria-current="page"] {
  position: relative;
}

.site-nav a:not(.nav-lock)[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -0.5rem;
  width: 1.15rem;
  height: 2px;
  border-radius: 2px;
  background: var(--fg-strong);
}

.nav-lock {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--fg-dim);
  font-size: 0.82rem;
  line-height: 1.4;
}

.nav-lock:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  text-decoration: none;
}

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
  color: var(--fg-faint);
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

.site-footer__inner {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: space-between;
}

/* ---------- 首页 ---------- */

.hero {
  padding-block: clamp(2.5rem, 9vw, 6.5rem) clamp(1.8rem, 5vw, 3rem);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 8.5vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: -0.021em;
  margin: 0 0 1.2rem;
  color: var(--fg-strong);
  font-weight: 400;
}

.hero p {
  margin: 0;
  color: var(--fg-dim);
  font-size: 1.06rem;
  max-width: 44ch;
  line-height: 1.95;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 2.5rem 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- 文章列表：卡片 ---------- */

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.post-card {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1.65rem 1.8rem 1.45rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease),
    transform 0.2s var(--ease);
}

.post-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.post-card__title {
  font-family: var(--font-serif);
  margin: 0 0 0.55rem;
  font-size: clamp(1.3rem, 2.6vw, 1.62rem);
  font-weight: 400;
  line-height: 1.28;
  letter-spacing: -0.011em;
  text-wrap: balance;
}

.post-card__title a {
  color: var(--fg-strong);
}

.post-card__title a:hover {
  color: var(--accent);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
}

.post-card__excerpt {
  margin: 0;
  color: var(--fg-dim);
  font-size: 0.95rem;
  line-height: 1.72;
}

/* 卡片底部的一行元信息：日期 · 字数 · 语言 · 标签 */
.post-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem 0.85rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  padding-top: 0.95rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--fg-faint);
}

.post-card__meta .dot {
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
  flex: none;
}

.post-card__tags {
  display: inline-flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.post-card__tags .tag {
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: var(--bg-elev-2);
  color: var(--fg-dim);
  font-size: 0.71rem;
  letter-spacing: 0;
}

.post-card__tags .tag:hover {
  background: var(--border);
  color: var(--fg-strong);
  text-decoration: none;
}

.lang-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  padding: 0.05rem 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--fg-dim);
  line-height: 1.5;
  text-transform: uppercase;
}

.lang-badge[data-lang="zh"] {
  color: #4a7a6d;
  border-color: #b9d4cb;
}
.lang-badge[data-lang="en"] {
  color: #4a6a96;
  border-color: #bccbe0;
}
.lang-badge[data-lang="de"] {
  color: #8a6a2f;
  border-color: #d9caa8;
}

.tag {
  font-size: 0.75rem;
  color: var(--fg-faint);
  font-family: var(--font-mono);
}

/* ---------- 文章页 ---------- */

.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5.2vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.018em;
  margin: 0.8rem 0 1rem;
  color: var(--fg-strong);
  font-weight: 400;
}

.post-header__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-faint);
  flex-wrap: wrap;
}

.prose {
  font-size: 1.02rem;
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.62rem;
  margin: 3rem 0 1rem;
  letter-spacing: -0.012em;
  color: var(--fg-strong);
  font-weight: 400;
}

.prose h3 {
  font-family: var(--font-serif);
  font-size: 1.24rem;
  margin: 2.2rem 0 0.75rem;
  color: var(--fg-strong);
  font-weight: 400;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1.15rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose ul,
.prose ol {
  padding-left: 1.3rem;
}

.prose blockquote {
  margin: 1.6rem 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 2px solid var(--accent-dim);
  color: var(--fg-dim);
}

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

.prose code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--bg-elev-2);
  padding: 0.12em 0.36em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.prose pre {
  background: #f6f3ec !important;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.7;
  margin: 1.7rem 0;
}

.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
}

.prose th,
.prose td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.prose th {
  background: var(--bg-elev);
  color: var(--fg-strong);
  font-weight: 600;
}

.prose img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ---------- 通用卡片 / 徽标 ---------- */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.76rem;
  font-family: var(--font-mono);
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--fg-dim);
}

.muted {
  color: var(--fg-dim);
}

.faint {
  color: var(--fg-faint);
}

.mono {
  font-family: var(--font-mono);
}

/* ---------- 表单 ---------- */

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.1rem;
}

.field label {
  font-size: 0.82rem;
  color: var(--fg-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

input[type="password"],
input[type="text"] {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--fg-strong);
  padding: 0.65rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

input:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px rgba(138, 90, 59, 0.1);
}

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--fg-strong);
  color: var(--bg);
  border: 0;
  border-radius: var(--radius);
  padding: 0.62rem 1.15rem;
  font-size: 0.92rem;
  font-weight: 500;
  font-family: inherit;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: opacity 0.15s var(--ease), transform 0.1s var(--ease);
}

button:hover,
.btn:hover {
  opacity: 0.86;
  text-decoration: none;
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.notice {
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  font-size: 0.88rem;
  margin-bottom: 1.1rem;
  border: 1px solid;
}

.notice--error {
  color: #8f332e;
  background: #fbf0ee;
  border-color: #e8c4bf;
}

.notice--ok {
  color: #3f6440;
  background: #f0f6ef;
  border-color: #c8ddc6;
}

/* ---------- 登录页 ---------- */

.login-shell {
  max-width: 26rem;
  margin: clamp(2rem, 12vh, 6rem) auto;
}

.login-shell h1 {
  font-size: 1.3rem;
  margin: 0 0 0.35rem;
  color: var(--fg-strong);
  font-weight: 640;
}

.login-shell .sub {
  color: var(--fg-faint);
  font-size: 0.84rem;
  font-family: var(--font-mono);
  margin: 0 0 1.8rem;
}

/* ---------- Study 页 ---------- */

.study-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--border);
}

.study-head h1 {
  margin: 0;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  color: var(--fg-strong);
  font-weight: 650;
}

.study-head .goal {
  color: var(--fg-dim);
  font-size: 0.9rem;
  margin: 0.45rem 0 0;
  max-width: 60ch;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.stat {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}

.stat__k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-faint);
  display: block;
  margin-bottom: 0.3rem;
}

.stat__v {
  font-size: 1.45rem;
  font-weight: 640;
  color: var(--fg-strong);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.stat__v small {
  font-size: 0.72rem;
  color: var(--fg-dim);
  font-weight: 400;
  margin-left: 0.2rem;
}

.panel {
  margin-bottom: 2.5rem;
}

.panel > h2 {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 1rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.panel > h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.module {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.7rem;
  overflow: hidden;
  background: var(--bg-elev);
}

.module > summary {
  cursor: pointer;
  padding: 0.8rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  list-style: none;
  user-select: none;
}

.module > summary::-webkit-details-marker {
  display: none;
}

.module > summary:hover {
  background: var(--bg-elev-2);
}

.module__title {
  font-weight: 600;
  color: var(--fg-strong);
  font-size: 0.96rem;
}

.module__meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--fg-faint);
  flex-wrap: wrap;
}

.bar {
  width: 74px;
  height: 4px;
  background: var(--border-strong);
  border-radius: 2px;
  overflow: hidden;
  flex: none;
}

.bar > i {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}

.points {
  list-style: none;
  margin: 0;
  padding: 0 1rem 0.7rem 1.5rem;
  border-top: 1px solid var(--border);
}

.point {
  display: grid;
  grid-template-columns: 5.2rem 1fr auto;
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
  font-size: 0.9rem;
}

.point:last-child {
  border-bottom: 0;
}

.point code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--fg-faint);
}

.point__title {
  color: var(--fg);
}

.stage {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.05rem 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--fg-faint);
  white-space: nowrap;
}

.stage[data-stage="见过"] {
  color: #4a6a96;
  border-color: #c2cfe0;
}
.stage[data-stage="能跟做"] {
  color: #4a7a5a;
  border-color: #c2d8c8;
}
.stage[data-stage="能独立做"] {
  color: #3f6a3c;
  border-color: #bcd2b8;
}
.stage[data-stage="熟练稳定"] {
  color: #8a6a2f;
  border-color: #dccfae;
}
.stage[data-stage="能讲明白"] {
  color: #7a5520;
  border-color: #dcc99c;
  background: #faf3e4;
}

.tasks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.task {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.55rem 0.1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
  font-size: 0.92rem;
}

.task:last-child {
  border-bottom: 0;
}

.task__box {
  width: 0.85rem;
  height: 0.85rem;
  border: 1.5px solid var(--border-strong);
  border-radius: 3px;
  flex: none;
  position: relative;
  top: 0.1rem;
}

.task[data-done="true"] .task__box {
  background: var(--ok);
  border-color: var(--ok);
}

.task[data-done="true"] .task__title {
  color: var(--fg-faint);
  text-decoration: line-through;
}

.task__title {
  flex: 1;
}

.task__min {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-faint);
}

.empty {
  color: var(--fg-faint);
  font-size: 0.88rem;
  padding: 1rem 0;
  font-family: var(--font-mono);
}

.mistake {
  border-left: 2px solid var(--border-strong);
  padding: 0.5rem 0 0.5rem 0.9rem;
  margin-bottom: 1rem;
}

.mistake__origin {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--fg-faint);
  margin-bottom: 0.25rem;
}

.mistake__step {
  font-size: 0.9rem;
  color: var(--fg);
}

.mistake__fix {
  font-size: 0.86rem;
  color: var(--fg-dim);
  margin-top: 0.3rem;
}

.mistake__status {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--warn);
}

.mistake[data-status="已复做对"] {
  border-left-color: var(--ok);
}

.mistake[data-status="已复做对"] .mistake__status {
  color: var(--ok);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: 0.6rem;
}

.mini-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.75rem;
  font-size: 0.86rem;
}

.mini-card__front {
  color: var(--fg-strong);
  font-weight: 550;
  margin-bottom: 0.2rem;
  word-break: break-word;
}

.mini-card__back {
  color: var(--fg-dim);
  font-size: 0.82rem;
}

/* ---------- 表格（窄屏可滚） ---------- */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.table-scroll table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 32rem;
}

.table-scroll th,
.table-scroll td {
  padding: 0.55rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table-scroll th {
  background: var(--bg-elev);
  color: var(--fg-dim);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.table-scroll tr:last-child td {
  border-bottom: 0;
}

/* ---------- 响应式 ---------- */

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header__inner {
    gap: 0.75rem;
    padding-block: 0.8rem;
  }

  .site-nav {
    gap: 0.9rem;
    font-size: 0.85rem;
  }

  .post-card {
    padding: 1.25rem 1.15rem 1.1rem;
    border-radius: 15px;
  }

  .post-card__meta {
    gap: 0.4rem 0.6rem;
    font-size: 0.7rem;
  }

  .hero {
    padding: 2.6rem 0 1.6rem;
  }

  .hero h1 {
    font-size: 2.35rem;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav__link--right {
    text-align: left;
  }

  .about__portrait {
    width: 96px;
    height: 96px;
  }

  .point {
    grid-template-columns: 1fr auto;
    gap: 0.3rem 0.6rem;
  }

  .point code {
    grid-column: 1 / -1;
    order: 3;
    font-size: 0.7rem;
  }

  .study-head h1 {
    font-size: 1.3rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- 右侧栏 ---------- */

.side-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1.15rem 1.15rem 1rem;
  box-shadow: var(--shadow-card);
}

.side-card--photo {
  text-align: center;
  padding: 1.1rem;
}

.side-card__photo {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 13px;
  background: var(--bg-elev-2);
}

.side-card__caption {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  color: var(--fg-strong);
  margin: 0.85rem 0 0.15rem;
}

.side-card__sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0;
}

.side-card__title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--fg-strong);
  margin: 0 0 0.6rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

.side-card__empty {
  margin: 0;
  font-size: 0.85rem;
  color: var(--fg-faint);
}

.side-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.side-tags li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.42rem 0;
  font-size: 0.88rem;
  color: var(--fg-dim);
  border-bottom: 1px dashed var(--border);
}

.side-tags li:last-child {
  border-bottom: 0;
}

.side-tags__count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-faint);
}

/* 中屏：侧栏掉到正文下面，变成两列小卡 */
@media (max-width: 1080px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .layout__side {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .layout__side {
    grid-template-columns: 1fr;
  }
}

/* ---------- 文章详情页 ---------- */

.post-card--single {
  padding: clamp(1.4rem, 3vw, 2.8rem);
  margin: 0 auto;
  width: 100%;
  max-width: 900px;
}

.post-card--single:hover {
  transform: none;
  box-shadow: var(--shadow-card);
  border-color: var(--border);
}

.post-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 4.4vw, 2.35rem);
  font-weight: 400;
  line-height: 1.24;
  letter-spacing: -0.014em;
  margin: 0 0 1rem;
  color: var(--fg-strong);
  text-wrap: balance;
}

.post-header__meta {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
  justify-content: flex-start;
}

.post-header__tags {
  margin-top: 0.8rem;
}

/* 上一页 / 下一页 */

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.6rem;
}

.post-nav__link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--bg);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.post-nav__link:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
  text-decoration: none;
}

.post-nav__link--right {
  text-align: right;
}

.post-nav__dir {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

.post-nav__title {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--fg-strong);
}

.back-home {
  margin: 2rem 0 3rem;
  font-size: 0.9rem;
}

/* ---------- 关于 ---------- */

.about {
  max-width: 46rem;
  padding: clamp(2rem, 6vw, 3.5rem) 0 4rem;
}

.about__portrait {
  display: block;
  width: 112px;
  height: 112px;
  border-radius: 24px;
  border: 1px solid var(--border);
  object-fit: cover;
  margin-bottom: 1.6rem;
}

.about__title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4.5vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  margin: 0 0 1.4rem;
  color: var(--fg-strong);
}

.about__body p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--fg-dim);
  margin: 0 0 1.1rem;
}

.about__foot {
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--fg-faint);
}


/* ---------- Django 版新增：进度条填充 / 勾选态 / 专注柱状图 ---------- */

.bar > span {
  display: block;
  height: 100%;
  background: var(--fg-strong);
  border-radius: 2px;
  transition: width 0.3s var(--ease);
}

.task__box[data-done="1"] {
  background: var(--fg-strong);
  border-color: var(--fg-strong);
}

.task__box[data-done="1"]::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0;
  width: 4px;
  height: 8px;
  border: solid var(--bg);
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(42deg);
}

.study-head .chip[aria-current="page"] {
  background: var(--fg-strong);
  color: var(--bg);
  border-color: var(--fg-strong);
}

.focus-chart {
  display: flex;
  align-items: flex-end;
  gap: 0.28rem;
  height: 7rem;
  padding: 0.5rem 0 0;
}

.focus-chart__col {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  height: 100%;
  gap: 0.35rem;
}

.focus-chart__bar {
  width: 100%;
  min-height: 2px;
  background: var(--border-strong);
  border-radius: 3px 3px 1px 1px;
  transition: height 0.3s var(--ease);
}

.focus-chart__bar[data-today="1"] {
  background: var(--fg-strong);
}

.focus-chart__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--fg-faint);
}

/* ---------- 代码高亮（Pygments / codehilite） ---------- */

.codehilite {
  background: #f7f7f8;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.65;
  margin: 1.3rem 0;
}

.codehilite pre {
  margin: 0;
  background: none;
  padding: 0;
  border: 0;
}

.codehilite .c, .codehilite .c1, .codehilite .cm, .codehilite .cs { color: #8a8f98; font-style: italic; }
.codehilite .k, .codehilite .kd, .codehilite .kn, .codehilite .kr { color: #8b3d8b; }
.codehilite .s, .codehilite .s1, .codehilite .s2, .codehilite .sb { color: #3f6a3c; }
.codehilite .n, .codehilite .nx { color: #1f2023; }
.codehilite .nf, .codehilite .fm { color: #2f5d8a; }
.codehilite .nc { color: #7a5520; font-weight: 600; }
.codehilite .mi, .codehilite .mf, .codehilite .m { color: #a05a2c; }
.codehilite .o, .codehilite .ow { color: #5f6368; }
.codehilite .nb, .codehilite .bp { color: #2f5d8a; }
.codehilite .err { color: #8f332e; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}