/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
:root {
  color-scheme: light;
  --color-bg: #fafaf8;
  --color-text: #0a0a0a;
  --color-muted: #525252;
  --color-body: #404040;
  --color-subtle: #737373;
  --color-faint: #a3a3a3;
  --color-border: #e5e5e5;
  --color-soft-border: #f0f0ee;
  --color-chip-bg: #f0efeb;
  --color-control-bg: #ffffff;
  --color-visual-bg: #f0efeb;
  --color-button-bg: #0a0a0a;
  --color-button-text: #fafaf8;
  --color-button-hover: #262626;
  --color-focus: #2f6f73;
  --color-accent: #c47855;
  --color-accent-soft: #e9c8b3;
  --color-blob-a: rgba(196, 120, 85, 0.18);
  --color-blob-b: rgba(47, 111, 115, 0.16);
  --shadow-card: 0 1px 2px rgba(10, 10, 10, 0.04), 0 8px 24px rgba(10, 10, 10, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(10, 10, 10, 0.06), 0 24px 48px rgba(10, 10, 10, 0.10);
  --grid-line: rgba(10, 10, 10, 0.05);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #121312;
  --color-text: #f4f0e8;
  --color-muted: #d4cec4;
  --color-body: #c9c2b8;
  --color-subtle: #a79f93;
  --color-faint: #82796d;
  --color-border: #34312d;
  --color-soft-border: #25231f;
  --color-chip-bg: #242b29;
  --color-control-bg: #1b1f1e;
  --color-visual-bg: #1e2427;
  --color-button-bg: #f4f0e8;
  --color-button-text: #121312;
  --color-button-hover: #d8d1c4;
  --color-focus: #72bbb1;
  --color-accent: #e0a380;
  --color-accent-soft: #6b4a37;
  --color-blob-a: rgba(224, 163, 128, 0.22);
  --color-blob-b: rgba(114, 187, 177, 0.18);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-card-hover: 0 2px 4px rgba(0, 0, 0, 0.5), 0 28px 60px rgba(0, 0, 0, 0.55);
  --grid-line: rgba(244, 240, 232, 0.05);
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, select { font: inherit; }
a:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
}
.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;
}
::selection { background: var(--color-accent-soft); color: var(--color-text); }

/* ---------- Layout container ---------- */
.nav, main, .footer { max-width: 880px; margin: 0 auto; padding-left: 32px; padding-right: 32px; }
@media (max-width: 600px) {
  .nav, main, .footer { padding-left: 20px; padding-right: 20px; }
  body { font-size: 16px; }
}

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-top: 28px;
  padding-bottom: 28px;
  font-size: 15px;
  position: sticky;
  top: 0;
  z-index: 50;
  isolation: isolate;
}
/* Full-viewport blurred background so the sticky nav blends edge-to-edge
   on narrow screens instead of showing a centered rectangle. */
.nav::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  z-index: -1;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  border-bottom: 1px solid var(--color-soft-border);
  pointer-events: none;
}
/* Browsers without backdrop-filter — fall back to a slightly more opaque tint. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav::before {
    background: color-mix(in srgb, var(--color-bg) 96%, transparent);
  }
}
.nav-name {
  font-family: 'Instrument Serif', serif;
  font-size: 22px;
  font-style: italic;
  letter-spacing: 0;
  white-space: nowrap;
  position: relative;
}
.nav-name::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}
.nav-name:hover::after { width: 100%; }
.nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav nav { display: flex; gap: 28px; }
.nav nav a {
  color: var(--color-muted);
  transition: color 0.2s ease;
  position: relative;
}
.nav nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--color-text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.nav nav a:hover { color: var(--color-text); }
.nav nav a:hover::after { transform: scaleX(1); }
.display-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}
.language-select {
  min-height: 38px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  background: var(--color-control-bg);
  padding: 8px 32px 8px 12px;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.language-select:hover { transform: translateY(-1px); }
.theme-toggle {
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  background: var(--color-control-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}
.theme-toggle:hover { transform: translateY(-1px) rotate(-12deg); }
.theme-toggle:hover,
.language-select:hover {
  border-color: var(--color-text);
}
.theme-icon {
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: currentColor;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
:root[data-theme="dark"] .theme-icon {
  background: transparent;
  box-shadow: inset -5px -5px 0 0 currentColor;
}
@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    position: relative;
  }
  /* Drop the glass effect on mobile — without sticky scrolling the
     blur/saturate just creates a visible tinted rectangle. */
  .nav::before {
    display: none;
  }
  .nav-right {
    width: 100%;
    justify-content: space-between;
    gap: 16px;
  }
  .nav nav {
    flex-wrap: wrap;
    gap: 18px;
  }
}
@media (max-width: 460px) {
  .nav-right {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 80px 0 100px;
  isolation: isolate;
}
.hero-decor {
  position: absolute;
  inset: -40px -120px 0 -120px;
  z-index: -1;
  pointer-events: none;
  --mx: 0;
  --my: 0;
}
.hero-decor .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.hero-decor .blob-a {
  width: 460px;
  height: 460px;
  top: -120px;
  right: -60px;
  background: var(--color-blob-a);
  transform: translate3d(calc(var(--mx) * 18px), calc(var(--my) * 18px), 0);
  animation: float-a 14s ease-in-out infinite;
}
.hero-decor .blob-b {
  width: 360px;
  height: 360px;
  bottom: -80px;
  left: -80px;
  background: var(--color-blob-b);
  transform: translate3d(calc(var(--mx) * -22px), calc(var(--my) * -22px), 0);
  animation: float-b 18s ease-in-out infinite;
}
.hero-decor .grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 30%, rgba(0,0,0,0.7), rgba(0,0,0,0) 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, rgba(0,0,0,0.7), rgba(0,0,0,0) 70%);
  opacity: 0.7;
}
@keyframes float-a {
  0%, 100% { translate: 0 0; }
  50% { translate: -16px 22px; }
}
@keyframes float-b {
  0%, 100% { translate: 0 0; }
  50% { translate: 18px -14px; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-decor .blob-a,
  .hero-decor .blob-b { animation: none; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-subtle);
  margin: 0 0 28px;
  padding: 6px 14px 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-control-bg);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  position: relative;
  flex: none;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-accent) 60%, transparent);
  animation: pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-accent) 60%, transparent); }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--color-accent) 0%, transparent); }
}
@media (prefers-reduced-motion: reduce) {
  .status-dot { animation: none; }
}

.hero h1 {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 32px;
}
.hero h1 em {
  font-style: italic;
  background: linear-gradient(120deg, var(--color-accent), var(--color-text) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: relative;
}
:root[data-theme="dark"] .hero h1 em {
  background: linear-gradient(120deg, var(--color-accent), var(--color-text) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  font-size: 18px;
  color: var(--color-body);
  max-width: 620px;
  margin: 0 0 40px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.25s ease,
              background-color 0.25s ease,
              border-color 0.25s ease,
              color 0.25s ease;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--color-button-bg);
  color: var(--color-button-text);
  box-shadow: 0 1px 2px rgba(10,10,10,0.08), 0 8px 18px rgba(10,10,10,0.10);
}
.btn-primary::after {
  content: "→";
  display: inline-block;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.btn-primary:hover {
  background: var(--color-button-hover);
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(10,10,10,0.10), 0 14px 28px rgba(10,10,10,0.16);
}
.btn-primary:hover::after { transform: translateX(4px); }
.btn-ghost { border-color: var(--color-border); color: var(--color-text); }
.btn-ghost:hover { border-color: var(--color-text); transform: translateY(-2px); }

/* Hero marquee */
.hero-marquee {
  margin-top: 64px;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--color-soft-border);
  border-bottom: 1px solid var(--color-soft-border);
  padding: 14px 0;
  mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  white-space: nowrap;
  animation: marquee 38s linear infinite;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-subtle);
  font-weight: 500;
}
.marquee-track span:nth-child(even) { color: var(--color-faint); font-weight: 400; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* ---------- Section titles ---------- */
.section-title {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  font-size: 36px;
  letter-spacing: -0.01em;
  margin: 0 0 56px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 56px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* ---------- Projects ---------- */
.projects { padding: 56px 0 24px; }
.project {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--color-soft-border);
  position: relative;
}
.project:last-child { border-bottom: none; }
@media (max-width: 720px) {
  .project { grid-template-columns: 1fr; gap: 28px; padding: 40px 0; }
  .project-visual { order: -1; }
}
.project-num {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 14px;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.project-num::after {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.6;
}
.project h3 {
  font-family: 'Instrument Serif', serif;
  font-weight: 400;
  font-size: 34px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.project h3 .zh {
  font-size: 22px;
  color: var(--color-subtle);
  margin-left: 8px;
}
.project-tag {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-subtle);
  margin: 0 0 20px;
  font-weight: 500;
}
.project-desc {
  font-size: 16px;
  color: var(--color-body);
  margin: 0 0 24px;
}
.stack {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.stack li {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--color-muted);
  background: var(--color-chip-bg);
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.stack li:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  transform: translateY(-1px);
}
.project-links { display: flex; gap: 24px; }
.project-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease, padding-right 0.25s ease;
  position: relative;
  padding-right: 0;
}
.project-links a:hover {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent);
}

.project-visual {
  border-radius: 14px;
  overflow: hidden;
  background: var(--color-visual-bg);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.project-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, color-mix(in srgb, var(--color-accent) 18%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity 0.45s ease;
  pointer-events: none;
}
.project-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--color-text) 6%, transparent);
}
.project:hover .project-visual {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}
.project:hover .project-visual::before { opacity: 1; }
.project-visual img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.project:hover .project-visual img { transform: scale(1.04); }

/* Stagger: alternate visual side on desktop for variety */
@media (min-width: 721px) {
  .project:nth-child(even) .project-meta { order: 2; }
  .project:nth-child(even) .project-visual { order: 1; }
}

/* ---------- About ---------- */
.about { padding: 80px 0; }
.about-body p {
  font-size: 17px;
  color: var(--color-body);
  max-width: 640px;
  margin: 0 0 20px;
}
.experience-strip {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-subtle);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
}
.experience-strip span:not(:first-child):nth-child(odd) { color: var(--color-faint); }

/* ---------- Contact ---------- */
.contact { padding: 80px 0 120px; position: relative; }
.contact::before {
  content: "";
  position: absolute;
  left: -80px;
  top: 40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: var(--color-blob-a);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}
.contact-lede {
  font-size: 20px;
  color: var(--color-body);
  margin: 0 0 32px;
  max-width: 560px;
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  line-height: 1.4;
}
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.contact-list li {
  padding: 18px 0;
  border-top: 1px solid var(--color-border);
  position: relative;
  transition: padding-left 0.3s ease;
}
.contact-list li:last-child { border-bottom: 1px solid var(--color-border); }
.contact-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) translateX(-12px);
  color: var(--color-accent);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.contact-list li:hover { padding-left: 24px; }
.contact-list li:hover::before { opacity: 1; transform: translateY(-50%) translateX(0); }
.contact-list a {
  font-size: 18px;
  color: var(--color-text);
  display: block;
  transition: color 0.2s ease;
}
.contact-list a:hover { color: var(--color-accent); }

/* ---------- Footer ---------- */
.footer {
  padding-top: 40px;
  padding-bottom: 40px;
  font-size: 13px;
  color: var(--color-faint);
  border-top: 1px solid var(--color-soft-border);
}