/* =========================================================
   wsh · 个人作品与电子书
   零依赖静态站样式 —— 温暖书卷感
   ========================================================= */

:root {
  --paper: #fbf8f1;
  --paper-2: #f5efe3;
  --paper-3: #ede4d2;
  --ink: #221e18;
  --ink-2: #574f43;
  --ink-3: #8b8174;
  --line: #e2d8c6;
  --line-strong: #cdbfa8;
  --accent: #a8563a;
  --accent-soft: #f2e3d9;
  --green: #3e5b4f;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong",
    Georgia, "Times New Roman", SimSun, serif;
  --sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --max: 1120px;
  --measure: 36rem;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 纸张颗粒 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.55;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.05'/%3E%3C/svg%3E");
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: 0.01em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- 页头 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header__inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 1.06rem;
  letter-spacing: 0.14em;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-size: 0.72rem;
  letter-spacing: 0;
  color: var(--accent);
  transform: translateY(-1px);
}

.nav {
  display: flex;
  align-items: baseline;
  gap: 26px;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.nav a {
  position: relative;
  padding-bottom: 3px;
  transition: color 0.2s var(--ease);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right 0.32s var(--ease);
}

.nav a:hover {
  color: var(--ink);
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  right: 0;
}

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

/* ---------- 通用排版 ---------- */

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-feature-settings: "tnum";
}

.display {
  font-size: clamp(2.1rem, 5.2vw, 3.5rem);
  letter-spacing: 0.005em;
}

.lead {
  font-family: var(--serif);
  font-size: 1.1rem;
  line-height: 1.9;
  color: var(--ink-2);
  max-width: 34rem;
}

.muted {
  color: var(--ink-3);
  font-size: 0.88rem;
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

.page-head {
  padding: 68px 0 40px;
  display: grid;
  gap: 16px;
}

.page-head .display {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  border-radius: 2px;
  transition: background 0.24s var(--ease), color 0.24s var(--ease),
    border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn--sm {
  padding: 7px 14px;
  font-size: 0.78rem;
}

.btn__arrow {
  font-family: var(--serif);
  transition: transform 0.24s var(--ease);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ---------- 首页 hero ---------- */

.hero {
  padding: 84px 0 64px;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 56px;
  align-items: end;
}

.hero__text {
  display: grid;
  gap: 26px;
  justify-items: start;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__aside {
  border-left: 1px solid var(--line);
  padding-left: 32px;
  display: grid;
  gap: 20px;
}

.stat-row {
  display: grid;
  gap: 18px;
}

.stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.stat__num {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-feature-settings: "tnum";
}

.stat__label {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
}

/* ---------- 区块 ---------- */

.section {
  padding: 56px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.section__title {
  font-size: 1.3rem;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.section__index {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  letter-spacing: 0.1em;
}

.section__link {
  font-size: 0.84rem;
  color: var(--ink-2);
  letter-spacing: 0.06em;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.section__link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- 作品卡片 ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap: 34px 28px;
}

.card {
  display: grid;
  gap: 16px;
  align-content: start;
}

.card__media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-2);
  aspect-ratio: 4 / 3;
  border-radius: 2px;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.card:hover .card__media img {
  transform: scale(1.035);
}

.card__body {
  display: grid;
  gap: 9px;
}

.card__title {
  font-family: var(--serif);
  font-size: 1.12rem;
  letter-spacing: 0.02em;
}

.card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.card__meta {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  text-transform: uppercase;
  font-feature-settings: "tnum";
}

.card__summary {
  font-size: 0.92rem;
  color: var(--ink-2);
  line-height: 1.78;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.tag {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ink-2);
  background: var(--paper);
}

/* ---------- 筛选 ---------- */

.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}

.chip {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  padding: 7px 15px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-2);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.22s var(--ease);
}

.chip:hover {
  border-color: var(--ink-2);
  color: var(--ink);
}

.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

/* ---------- 电子书列表 ---------- */

.book-list {
  display: grid;
  gap: 30px;
}

.book-row {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.book-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.book-row__cover {
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--paper-2);
}

.book-row__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-row__body {
  display: grid;
  gap: 10px;
  align-content: start;
}

.book-row__title {
  font-family: var(--serif);
  font-size: 1.35rem;
}

.book-row__sub {
  font-size: 0.86rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

.book-row__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.badge {
  display: inline-block;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  padding: 3px 9px;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 2px;
  background: var(--accent-soft);
}

/* ---------- 关于页 ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  padding-bottom: 40px;
}

.portrait {
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--paper-2);
}

.about-text {
  display: grid;
  gap: 20px;
  font-family: var(--serif);
  font-size: 1.02rem;
  line-height: 1.95;
  color: var(--ink-2);
  max-width: var(--measure);
}

.timeline {
  display: grid;
  gap: 0;
  margin-top: 8px;
}

.tl-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}

.tl-item:last-child {
  border-bottom: 1px solid var(--line);
}

.tl-year {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.contact-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 0.94rem;
}

.contact-item span:first-child {
  min-width: 56px;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.contact-item a:hover {
  color: var(--accent);
}

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 40px 0 56px;
  font-size: 0.82rem;
  color: var(--ink-3);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  align-items: baseline;
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__links a:hover {
  color: var(--accent);
}

/* ---------- 阅读器 ---------- */

body.reader {
  --read-size: 1.06rem;
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 100;
  transition: width 0.1s linear;
}

.reader-bar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.reader-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 10px 0;
}

.reader-bar__title {
  font-family: var(--serif);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-2);
  border-radius: 2px;
  cursor: pointer;
  font-size: 0.78rem;
  font-family: var(--sans);
  transition: all 0.2s var(--ease);
}

.icon-btn:hover {
  border-color: var(--ink-2);
  color: var(--ink);
}

.icon-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.reader-grid {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 52px;
  padding: 44px 0 80px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 10px;
  font-size: 0.86rem;
}

.toc__label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.toc a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: var(--ink-2);
  padding: 5px 0 5px 12px;
  border-left: 1px solid var(--line);
  transition: all 0.2s var(--ease);
  line-height: 1.5;
}

.toc__n {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.toc a:hover {
  color: var(--ink);
  border-color: var(--ink-3);
}

.toc a[aria-current="true"] {
  color: var(--accent);
  border-color: var(--accent);
}

.reader-main {
  max-width: var(--measure);
}

.article {
  max-width: var(--measure);
  font-family: var(--serif);
  font-size: var(--read-size);
  line-height: 1.95;
  color: #2a251e;
  letter-spacing: 0.012em;
}

.article h2 {
  font-size: 1.6rem;
  margin: 2.1em 0 1em;
  padding-top: 0.4em;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.chapter-head {
  margin: 0 0 1.9em;
  padding-bottom: 1.5em;
  border-bottom: 1px solid var(--line);
}

.chapter-head__meta {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.9em;
  text-indent: 0;
}

.chapter-head h2 {
  margin: 0;
  padding-top: 0;
  font-size: 2.1rem;
}

.article h2:first-child {
  margin-top: 0;
}

.article h3 {
  font-size: 1.14rem;
  margin: 1.8em 0 0.7em;
}

.article p {
  margin: 0 0 0.95em;
  text-indent: 2em;
}

.article h2 + p,
.article h3 + p,
.article blockquote p,
.article li p {
  text-indent: 0;
}

.article blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--line-strong);
  color: var(--ink-2);
  font-size: 0.98em;
}

.article ul,
.article ol {
  margin: 0 0 1.1em;
  padding-left: 1.5em;
}

.article li {
  margin-bottom: 0.4em;
}

.article em {
  font-style: normal;
  color: var(--accent);
}

.article strong {
  font-weight: 700;
}

.article hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 2.4em 0;
}

.article a {
  border-bottom: 1px solid var(--line-strong);
}

.article a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.article img {
  margin: 1.8em auto;
  border: 1px solid var(--line);
}

.reader-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
  font-family: var(--sans);
}

.reader-nav a {
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.reader-nav a:hover {
  color: var(--accent);
}

.reader-nav .disabled {
  opacity: 0.35;
  pointer-events: none;
}

.pdf-frame {
  width: 100%;
  height: min(78vh, 900px);
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.reader-intro {
  display: grid;
  gap: 14px;
  margin-bottom: 40px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
}

/* 阅读器里的介绍块不要首行缩进 */
.article .reader-intro p {
  text-indent: 0;
}

.pdf-hint {
  margin: 14px 0 0;
  font-size: 0.84rem;
  color: var(--ink-3);
  text-indent: 0;
}

.pdf-hint a {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}

/* 夜间阅读 */

body.night {
  --paper: #1a1714;
  --paper-2: #221e1a;
  --paper-3: #2a2521;
  --ink: #ece4d5;
  --ink-2: #c4b9a6;
  --ink-3: #8d8474;
  --line: #332d27;
  --line-strong: #4a423a;
  --accent: #d08a66;
  --accent-soft: #3a2a22;
}

body.night .article {
  color: #ddd3c2;
}

body.night::after {
  opacity: 0.25;
}

/* ---------- 404 ---------- */

.center-page {
  min-height: 62vh;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 18px;
  padding: 60px 0;
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 56px 0 44px;
  }

  .hero__aside {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 26px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .portrait {
    max-width: 220px;
  }

  .reader-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 28px;
  }

  .toc {
    position: static;
    border-bottom: 1px solid var(--line);
    padding-bottom: 18px;
  }
}

@media (max-width: 620px) {
  .wrap {
    padding: 0 20px;
  }

  .nav {
    gap: 18px;
    font-size: 0.84rem;
    width: 100%;
    padding-bottom: 8px;
  }

  .header__inner {
    min-height: 0;
  }

  .book-row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
  }

  .card__media {
    aspect-ratio: 3 / 2;
  }

  .grid {
    gap: 30px;
  }

  .display {
    font-size: 1.95rem;
  }
}

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

/* 打印 */

@media print {
  .site-header,
  .site-footer,
  .toc,
  .reader-bar,
  .progress,
  .reader-nav {
    display: none !important;
  }

  .reader-grid {
    display: block;
    padding: 0;
  }

  .article {
    max-width: none;
  }
}