:root {
  color-scheme: light;
  --bg: #f6f3ed;
  --surface: #fffdfa;
  --surface-soft: #eee8de;
  --surface-raised: #ffffff;
  --text: #25211d;
  --muted: #716b63;
  --faint: #9a9288;
  --border: #ded5c8;
  --accent: #1f7a68;
  --accent-strong: #115849;
  --accent-warm: #bd5f32;
  --danger: #b34045;
  --shadow: 0 24px 70px rgba(75, 61, 42, 0.12);
  --radius: 18px;
  --radius-lg: 26px;
  --max: 1160px;
  --article: 760px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141312;
  --surface: #1c1a18;
  --surface-soft: #25221f;
  --surface-raised: #201e1c;
  --text: #f2eee8;
  --muted: #bbb3a8;
  --faint: #8f877d;
  --border: #37322e;
  --accent: #77c8b2;
  --accent-strong: #9edbc9;
  --accent-warm: #eea16e;
  --danger: #ff8b91;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-soft), transparent 55%) 0, transparent 460px),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

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

svg {
  width: 18px;
  height: 18px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--border), transparent 28%);
  background: color-mix(in srgb, var(--bg), transparent 8%);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  align-items: center;
  width: min(var(--max), calc(100vw - 40px));
  margin: 0 auto;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark,
.profile-avatar {
  display: grid;
  place-items: center;
  background: var(--text);
  color: var(--bg);
  font-weight: 800;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 15px;
  font-size: 19px;
}

.brand-copy strong,
.brand-copy small {
  display: block;
}

.brand-copy strong {
  line-height: 1.1;
  font-size: 18px;
}

.brand-copy small {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 4px;
}

.site-nav a {
  border-radius: 999px;
  color: var(--muted);
  padding: 8px 13px;
  transition:
    background 160ms ease,
    color 160ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--surface-soft);
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: clamp(190px, 21vw, 310px);
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  padding: 0 12px;
}

.search-box input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
}

input,
select,
textarea {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  outline: none;
}

input:focus,
select:focus,
textarea:focus,
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent), transparent 84%);
}

.app {
  min-height: calc(100vh - 146px);
}

.section {
  width: min(var(--max), calc(100vw - 40px));
  margin: 0 auto;
  padding: 56px 0;
}

.section-tight {
  padding-top: 22px;
}

.home-hero {
  padding-top: 58px;
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 34px;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: 34px;
  background:
    radial-gradient(circle at 12% 12%, color-mix(in srgb, var(--accent), transparent 80%), transparent 34%),
    radial-gradient(circle at 82% 18%, color-mix(in srgb, var(--accent-warm), transparent 82%), transparent 28%),
    var(--surface);
  box-shadow: var(--shadow);
  padding: clamp(28px, 5vw, 56px);
}

.hero-copy h1,
.page-head h1,
.article h1,
.project-detail h1,
.about-intro h1 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.02;
}

.hero-copy h1 {
  max-width: 760px;
  font-size: clamp(58px, 10vw, 118px);
}

.hero-copy p {
  max-width: 660px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.profile-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--surface-raised), transparent 10%);
  padding: 24px;
}

.profile-avatar {
  width: 58px;
  height: 58px;
  border-radius: 20px;
  margin-bottom: 18px;
  font-size: 24px;
}

.profile-avatar-large {
  width: 82px;
  height: 82px;
  border-radius: 28px;
}

.profile-name {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
}

.profile-role,
.muted {
  color: var(--muted);
}

.profile-role {
  margin: 2px 0 0;
}

.profile-stats,
.about-index {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 22px 0 0;
}

.profile-stats div,
.about-index div {
  border-radius: 16px;
  background: var(--surface-soft);
  padding: 14px;
}

.profile-stats dt,
.about-index span {
  color: var(--muted);
  font-size: 12px;
}

.profile-stats dd,
.about-index strong {
  display: block;
  margin: 0;
  font-size: 24px;
  font-weight: 800;
}

.content-layout,
.article-layout,
.project-layout {
  display: grid;
  grid-template-columns: minmax(0, 820px) 300px;
  gap: 36px;
  align-items: start;
}

.main-column {
  min-width: 0;
}

.section-head,
.page-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin-bottom: 24px;
}

.section-head h2,
.page-head h1 {
  margin: 0;
}

.section-head h2 {
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: 0;
  line-height: 1.08;
}

.page-head {
  padding-top: 72px;
}

.page-head h1 {
  font-size: clamp(44px, 7vw, 82px);
}

.page-head p {
  max-width: 640px;
  color: var(--muted);
  font-size: 18px;
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--accent-warm);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.post-row,
.project-card,
.comment,
.side-box,
.rail-section,
.comment-login,
.empty-state {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.post-thumb img,
.project-cover-link img,
.article-cover,
.project-cover {
  width: 100%;
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--surface-soft);
}

.post-row h3,
.project-card h3 {
  margin: 8px 0 8px;
  line-height: 1.25;
}

.post-row p,
.project-card p {
  color: var(--muted);
}

.post-list,
.project-list {
  display: grid;
  gap: 16px;
}

.post-list-wide {
  max-width: 920px;
}

.post-row {
  display: grid;
  grid-template-columns: 154px minmax(0, 1fr);
  gap: 20px;
  padding: 18px;
  min-height: 190px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.post-row:hover,
.project-card:hover,
.mini-project:hover {
  border-color: color-mix(in srgb, var(--accent), var(--border) 45%);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.post-thumb img {
  height: 100%;
  min-height: 150px;
  aspect-ratio: 1 / 1;
}

.post-thumb {
  display: block;
  min-height: 150px;
}

.post-thumb-fallback {
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--accent), transparent 74%), transparent 62%),
    var(--surface-soft);
  color: var(--accent-strong);
  font-size: 34px;
  font-weight: 900;
}

.post-row-body {
  min-width: 0;
  padding: 6px 4px 4px 0;
}

.post-row h3 {
  font-size: clamp(24px, 2.7vw, 34px);
}

.post-row p {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  margin: 0;
  font-size: 16px;
}

.card-meta,
.article-meta,
.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--faint);
  font-size: 13px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 14px 0 0;
  list-style: none;
}

.tag,
.category-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border: 1px solid color-mix(in srgb, var(--border), transparent 22%);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  padding: 4px 11px;
  font-size: 13px;
}

.topic-list,
.link-stack,
.mini-projects {
  display: grid;
  gap: 10px;
}

.rail,
.sidebar {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 16px;
}

.rail-section,
.side-box {
  padding: 22px;
}

.rail-section h2,
.side-box h2 {
  margin: 0 0 16px;
  font-size: 18px;
}

.mini-project {
  display: grid;
  gap: 2px;
  border: 1px solid color-mix(in srgb, var(--border), transparent 20%);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface-raised), transparent 22%);
  padding: 14px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.mini-project span {
  color: var(--muted);
  font-size: 13px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.filters input,
.filters select {
  min-height: 44px;
  padding: 8px 12px;
}

.article-layout,
.project-layout {
  grid-template-columns: minmax(0, var(--article)) 280px;
  justify-content: center;
  padding-top: 76px;
}

.article,
.project-detail {
  min-width: 0;
}

.article-head {
  margin-bottom: 28px;
}

.article h1,
.project-detail h1 {
  margin-top: 16px;
  font-size: clamp(38px, 6vw, 68px);
}

.article-summary {
  max-width: 680px;
  color: var(--muted);
  font-size: 20px;
}

.article-cover,
.project-cover {
  aspect-ratio: 16 / 8;
  margin: 24px 0 32px;
}

.markdown {
  color: color-mix(in srgb, var(--text), var(--muted) 8%);
  font-size: 18px;
}

.markdown > *:first-child {
  margin-top: 0;
}

.markdown h2,
.markdown h3 {
  margin-top: 38px;
  line-height: 1.25;
}

.markdown p,
.markdown li {
  margin: 16px 0;
}

.markdown a,
.text-link,
.link-stack a {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.markdown blockquote {
  margin: 24px 0;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--surface-soft);
  padding: 14px 18px;
}

.markdown pre {
  overflow: auto;
  border-radius: var(--radius);
  padding: 18px;
}

.markdown :not(pre) > code {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-soft);
  padding: 2px 6px;
}

.project-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-card {
  overflow: hidden;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.project-cover-link img {
  aspect-ratio: 16 / 9;
  border-radius: 0;
}

.project-card-body {
  padding: 20px;
}

.comments-section {
  margin-top: 58px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
}

.comments {
  display: grid;
  gap: 12px;
}

.comment {
  padding: 16px;
}

.comment-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

.comment p {
  margin-bottom: 0;
}

.comment-login {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 16px;
  padding: 18px;
}

.comment-login p {
  margin: 4px 0 0;
  color: var(--muted);
}

.comment-form {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.comment-form textarea {
  min-height: 132px;
  resize: vertical;
  padding: 14px;
}

.comment-form-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.about-page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 46px;
  align-items: end;
  padding-top: 92px;
}

.about-intro h1 {
  margin-top: 16px;
  font-size: clamp(48px, 8vw, 92px);
}

.about-intro p {
  max-width: 690px;
  color: var(--muted);
  font-size: 20px;
}

.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.about-index {
  margin: 0;
}

.empty-state {
  padding: 34px;
  color: var(--muted);
  text-align: center;
}

.empty-state-compact {
  padding: 18px;
}

.button,
.icon-button,
.modal-close {
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  background: var(--text);
  color: var(--bg);
  padding: 9px 17px;
  font-weight: 800;
}

.button:hover,
.icon-button:hover,
.modal-close:hover {
  transform: translateY(-1px);
}

.button-soft {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.button-danger {
  border-color: color-mix(in srgb, var(--danger), transparent 58%);
  background: color-mix(in srgb, var(--danger), transparent 86%);
  color: var(--danger);
}

.button-github {
  width: 100%;
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.icon-button,
.modal-close {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: rgba(20, 17, 14, 0.52);
  padding: 20px;
}

.modal-backdrop[hidden] {
  display: none;
}

.auth-modal {
  position: relative;
  width: min(460px, 100%);
  border: 1px solid var(--border);
  border-radius: 30px;
  background: var(--surface-raised);
  box-shadow: var(--shadow);
  padding: 30px;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
}

.auth-intro {
  padding-right: 54px;
}

.auth-intro h2 {
  margin: 0;
  font-size: 32px;
  line-height: 1.12;
}

.auth-intro p:not(.eyebrow) {
  color: var(--muted);
}

.auth-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  border-radius: 999px;
  background: var(--surface-soft);
  padding: 5px;
  margin: 24px 0 18px;
}

.auth-switch button {
  min-height: 40px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}

.auth-switch button[aria-selected="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 8px 24px rgba(65, 50, 31, 0.08);
}

.auth-form {
  display: grid;
  gap: 13px;
}

.auth-form label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.auth-form input {
  min-height: 48px;
  padding: 10px 13px;
}

.auth-submit {
  width: 100%;
  margin-top: 4px;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--faint);
  font-size: 13px;
  margin: 18px 0;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--border);
}

.form-message {
  min-height: 23px;
  color: var(--muted);
  font-size: 14px;
}

.admin-gate {
  display: grid;
  min-height: 58vh;
  align-items: center;
}

.admin-gate h1,
.admin-head h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.02;
}

.admin-gate p,
.admin-head p,
.panel-head p {
  color: var(--muted);
}

.admin-sql {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
  padding: 16px;
}

.admin-page {
  padding-top: 72px;
}

.admin-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
  margin-bottom: 24px;
}

.admin-actions,
.form-actions,
.admin-item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
  gap: 18px;
  align-items: start;
}

.admin-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 22px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}

.panel-head h2 {
  margin: 0;
}

.panel-head p {
  margin: 4px 0 0;
  font-size: 14px;
}

.admin-form {
  display: grid;
  gap: 14px;
}

.admin-form label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
}

.admin-form input,
.admin-form select,
.admin-form textarea {
  width: 100%;
  padding: 10px 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.content-editor {
  min-height: 300px;
  resize: vertical;
  font-family:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  line-height: 1.55;
}

.checkbox-field {
  display: flex !important;
  grid-template-columns: auto 1fr;
  flex-direction: row;
  align-items: center;
}

.checkbox-field input {
  width: auto;
}

.admin-list {
  display: grid;
  gap: 12px;
}

.admin-item {
  display: grid;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-raised);
  padding: 16px;
}

.admin-item h3 {
  margin: 6px 0 4px;
}

.admin-item p {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: min(var(--max), calc(100vw - 40px));
  margin: 0 auto;
  padding: 30px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 960px) {
  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .header-actions {
    grid-column: 1 / -1;
    justify-content: stretch;
  }

  .search-box {
    flex: 1;
    width: auto;
  }

  .home-hero,
  .hero-shell,
  .content-layout,
  .article-layout,
  .project-layout,
  .about-page,
  .admin-grid {
    grid-template-columns: 1fr;
  }

  .rail,
  .sidebar {
    position: static;
  }

  .project-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .section {
    width: min(100vw - 28px, var(--max));
    padding: 38px 0;
  }

  .header-inner,
  .site-footer {
    width: min(100vw - 28px, var(--max));
  }

  .brand-copy small {
    display: none;
  }

  .home-hero,
  .page-head,
  .article-layout,
  .project-layout,
  .about-page {
    padding-top: 42px;
  }

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

  .post-thumb img {
    min-height: auto;
    aspect-ratio: 16 / 9;
  }

  .post-thumb,
  .post-thumb-fallback {
    min-height: 180px;
  }

  .section-head,
  .admin-head,
  .comment-login,
  .comment-form-foot,
  .site-footer {
    display: block;
  }

  .text-link,
  .comment-login .button,
  .comment-form-foot .button {
    margin-top: 12px;
  }

  .profile-stats,
  .about-index,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .auth-modal {
    border-radius: 24px;
    padding: 24px;
  }
}