/* ---------------------------------------------------------------------------
   Min Zhang — personal site theme
   Edit this file freely: the exporter copies it to site/assets/css/site.css
   on every run and never rewrites its contents.
   --------------------------------------------------------------------------- */

:root {
  --paper: #f6f4f0;
  --paper-raised: #fffefb;
  --ink: #1a1a19;
  --ink-soft: #4a4642;
  --muted: #7d776f;
  --rule: rgba(26, 26, 25, 0.14);
  --rule-soft: rgba(26, 26, 25, 0.07);
  --accent: #8a5a3c;
  --shadow: 0 1px 2px rgba(26, 26, 25, 0.04), 0 12px 32px rgba(26, 26, 25, 0.07);

  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN",
    "STSong", Georgia, "Times New Roman", serif;
  --sans: "Helvetica Neue", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --measure: 34rem;
  --wide: 76rem;
  --step: clamp(1.75rem, 4vw, 3.25rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121110;
    --paper-raised: #1a1917;
    --ink: #ece7df;
    --ink-soft: #c3bcb1;
    --muted: #8d867c;
    --rule: rgba(236, 231, 223, 0.16);
    --rule-soft: rgba(236, 231, 223, 0.08);
    --accent: #c99367;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px rgba(0, 0, 0, 0.45);
  }
}

*,
*::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(--serif);
  font-size: 1.0625rem;
  line-height: 1.75;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 50;
  background: var(--paper-raised);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--rule);
}

/* ------------------------------------------------------------------ chrome */

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  max-width: var(--wide);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 5vw, 3rem) 1.25rem;
  border-bottom: 1px solid var(--rule-soft);
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.25rem);
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ink);
  border-color: var(--ink);
}
.nav-link.is-active {
  color: var(--ink);
  border-color: var(--accent);
}

.site-main {
  max-width: var(--wide);
  margin: 0 auto;
  padding: var(--step) clamp(1.25rem, 5vw, 3rem) 5rem;
}

.site-footer {
  border-top: 1px solid var(--rule-soft);
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.footer-inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 5vw, 3rem) 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
}
.footer-link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}
.footer-link:hover {
  color: var(--ink);
}
.footer-updated {
  margin-left: auto;
}

/* -------------------------------------------------------------------- hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 4.5rem);
  align-items: start;
  padding-block: clamp(1rem, 4vw, 3rem) clamp(2.5rem, 7vw, 5.5rem);
}

@media (max-width: 46rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-portrait {
    max-width: 12rem;
  }
}

.hero-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(0.15);
  border-radius: 2px;
  box-shadow: var(--shadow);
}

.hero-name {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  line-height: 1.02;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0 0 0.75rem;
}

.hero-tagline {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 2rem;
}

.hero-intro {
  max-width: var(--measure);
}
.hero-intro p {
  font-size: 1.125rem;
  color: var(--ink-soft);
}

.section-label {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule-soft);
}

.home-extra {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  max-width: var(--measure);
}

/* ------------------------------------------------------------- page header */

.page-head {
  max-width: var(--measure);
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.page-title {
  font-size: clamp(1.85rem, 4.5vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  margin: 0;
}
.page-subtitle {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0.9rem 0 0;
}

.back-link {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 2rem;
}
.back-link:hover {
  color: var(--ink);
}

/* -------------------------------------------------------------------- grid */

.series {
  margin-bottom: clamp(3rem, 8vw, 5.5rem);
}
.series-title {
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  font-weight: 400;
  margin: 0 0 1.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--rule-soft);
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  flex-wrap: wrap;
}
.series-sub {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(19rem, 100%), 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.grid-sections {
  grid-template-columns: repeat(auto-fill, minmax(min(22rem, 100%), 1fr));
}

.card {
  display: block;
  text-decoration: none;
  color: inherit;
}
.card-media {
  display: block;
  overflow: hidden;
  background: var(--rule-soft);
  border-radius: 2px;
}
.card-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), filter 0.5s ease;
}
.card-media-empty {
  display: block;
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, var(--rule-soft), transparent);
}
.card:hover .card-media img,
.card:focus-visible .card-media img {
  transform: scale(1.035);
}

.card-body {
  display: block;
  padding-top: 0.9rem;
}
.card-title {
  display: block;
  font-size: 1.0625rem;
  line-height: 1.4;
}
.card-sub,
.card-count {
  display: block;
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.4rem;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}
.tag {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}
.work-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: -1.5rem 0 2.5rem;
}

.empty {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
}

/* ------------------------------------------------------------------- prose */

.prose p {
  margin: 0 0 1.4rem;
}
.prose p,
.prose .rt-list,
.prose .rt-quote,
.prose .rt-callout,
.prose .rt-heading {
  max-width: var(--measure);
}

.work-body {
  max-width: none;
}
.work-body p,
.work-body .rt-list,
.work-body .rt-quote,
.work-body .rt-callout,
.work-body .rt-heading {
  max-width: var(--measure);
}

.rt-heading {
  font-weight: 400;
  line-height: 1.25;
  margin: 2.75rem 0 1rem;
}
h2.rt-heading {
  font-size: clamp(1.4rem, 3vw, 1.85rem);
}
h3.rt-heading {
  font-size: 1.25rem;
}
h4.rt-heading {
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
}

.rt-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  transition: background 0.2s ease;
}
.rt-link:hover {
  background: var(--rule-soft);
}

/* Notion text colours (`rt-<color>`) and highlights (`rt-<color>_background`). */
.rt-gray { color: var(--muted); }
.rt-brown { color: #8a6a52; }
.rt-orange { color: #b06a2c; }
.rt-yellow { color: #94781f; }
.rt-green { color: #4d7a52; }
.rt-blue { color: #3f6b95; }
.rt-purple { color: #71559b; }
.rt-pink { color: #a2497c; }
.rt-red { color: #a5443a; }

@media (prefers-color-scheme: dark) {
  .rt-brown { color: #c39a7c; }
  .rt-orange { color: #d99553; }
  .rt-yellow { color: #cbaf4e; }
  .rt-green { color: #86b085; }
  .rt-blue { color: #7fa8cf; }
  .rt-purple { color: #a893cd; }
  .rt-pink { color: #d283ac; }
  .rt-red { color: #d77e73; }
}

[class*="_background"] {
  padding: 0.05em 0.25em;
  border-radius: 2px;
  background: var(--rule-soft);
}
.rt-yellow_background { background: rgba(214, 178, 47, 0.22); }
.rt-orange_background { background: rgba(200, 118, 47, 0.2); }
.rt-red_background { background: rgba(190, 78, 66, 0.18); }
.rt-pink_background { background: rgba(190, 82, 140, 0.18); }
.rt-purple_background { background: rgba(126, 96, 175, 0.18); }
.rt-blue_background { background: rgba(70, 122, 172, 0.18); }
.rt-green_background { background: rgba(88, 140, 94, 0.18); }
.rt-brown_background { background: rgba(140, 108, 82, 0.2); }

.rt-list {
  padding-left: 1.25rem;
  margin: 0 0 1.4rem;
}
.rt-list li {
  margin-bottom: 0.4rem;
}

.rt-quote {
  margin: 0 0 1.6rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--accent);
  color: var(--ink-soft);
  font-style: italic;
}

.rt-callout {
  display: flex;
  gap: 0.85rem;
  margin: 0 0 1.6rem;
  padding: 1.1rem 1.25rem;
  background: var(--paper-raised);
  border: 1px solid var(--rule-soft);
  border-radius: 3px;
}
.rt-callout-icon {
  flex: none;
  width: 1.4rem;
  font-size: 1.1rem;
  line-height: 1.6;
}
.rt-callout p:last-child {
  margin-bottom: 0;
}

.rt-divider {
  border: 0;
  border-top: 1px solid var(--rule-soft);
  margin: 2.75rem 0;
}

.rt-todo {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.rt-toggle {
  margin-bottom: 1.2rem;
  border-bottom: 1px solid var(--rule-soft);
  padding-bottom: 0.75rem;
}
.rt-toggle summary {
  cursor: pointer;
}
.rt-toggle-body {
  padding-top: 0.75rem;
}

.rt-code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  background: var(--paper-raised);
  border: 1px solid var(--rule-soft);
  border-radius: 3px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.6rem;
}
code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.rt-table-wrap {
  overflow-x: auto;
  margin: 0 0 1.8rem;
}
.rt-table {
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.9rem;
  min-width: 100%;
}
.rt-table th,
.rt-table td {
  border: 1px solid var(--rule-soft);
  padding: 0.55rem 0.8rem;
  text-align: left;
  vertical-align: top;
}
.rt-table th {
  font-weight: 500;
  background: var(--paper-raised);
}

.rt-columns {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
  margin-bottom: 1.8rem;
}

.rt-embed {
  display: block;
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 1rem 1.15rem;
  margin-bottom: 1.6rem;
  background: var(--paper-raised);
}
.rt-embed-title {
  display: block;
}
.rt-embed-desc,
.rt-embed-url {
  display: block;
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.35rem;
  word-break: break-all;
}

.rt-file a {
  font-family: var(--sans);
  font-size: 0.85rem;
}

/* ----------------------------------------------------------------- figures */

.rt-figure {
  margin: 0 0 clamp(1.75rem, 4vw, 3rem);
}
.rt-figure img {
  width: 100%;
  border-radius: 2px;
  background: var(--rule-soft);
}
.lightbox-open {
  display: block;
  cursor: zoom-in;
}
.rt-caption {
  font-family: var(--sans);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
  margin-top: 0.7rem;
  max-width: var(--measure);
}
.rt-media video,
.rt-media audio {
  width: 100%;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0d0c0b;
  border-radius: 2px;
  overflow: hidden;
}
.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* --------------------------------------------------------------- page link */

.page-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.page-link-thumb {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: cover;
  border-radius: 2px;
  flex: none;
}
.page-link-emoji {
  font-size: 1.25rem;
}
.page-link-sub {
  display: block;
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ------------------------------------------------------------ sibling nav */

.sibling-nav {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-top: clamp(3rem, 7vw, 5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule-soft);
}
.sibling {
  text-decoration: none;
  max-width: 45%;
}
.sibling.next {
  text-align: right;
}
.sibling-label {
  display: block;
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.sibling-title {
  display: block;
  line-height: 1.4;
}
.sibling:hover .sibling-title {
  color: var(--accent);
}

/* ---------------------------------------------------------------- lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 3rem);
  background: rgba(12, 11, 10, 0.94);
  cursor: zoom-out;
}
.lightbox[hidden] {
  display: none;
}
.lightbox-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 2px;
}
.lightbox-close {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  background: none;
  border: 0;
  color: #f4f1ec;
  font-size: 2.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.6rem;
}

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

@media print {
  .site-nav,
  .site-footer,
  .lightbox,
  .sibling-nav {
    display: none;
  }
}