/* =============================================================================
   JEFFERSON DELGADO — Portfolio
   Brand: "Jeff — Brand System Vol. 01" · Monochrome editorial, quiet authority
   Type: Space Grotesk (display/body) · Instrument Serif (italic accents) · JetBrains Mono (labels)
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Instrument+Serif:ital@0;1&family=JetBrains+Mono:wght@300;400;500&display=swap");

/* ————————————————————————————— TOKENS ————————————————————————————— */
:root {
  --ink: #0A0A0B;
  --paper: #F2EFE9;
  --paper-50: #FAF8F4;
  --grey-900: #131315;
  --grey-800: #1C1C1F;
  --grey-700: #2A2A2E;
  --grey-600: #3A3A3F;
  --grey-500: #5C5C62;
  --grey-400: #8A8A90;
  --grey-300: #B4B3AE;
  --grey-200: #D4D2CC;
  --grey-100: #E5E3DD;
  --silver: #C8C6C0;

  --display: "Space Grotesk", system-ui, sans-serif;
  --serif: "Instrument Serif", "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  --pad-x: clamp(20px, 4vw, 72px);
  --col-gap: clamp(16px, 1.8vw, 28px);
  --maxw: 1600px;

  --ease: cubic-bezier(.2, .7, .1, 1);
  --ease-io: cubic-bezier(.7, .1, .2, 1);

  /* DARK — default */
  --bg: var(--ink);
  --fg: var(--paper);
  --muted: var(--grey-400);
  --dim: var(--grey-500);
  --surface: var(--grey-900);
  --surface-2: var(--grey-800);
  --rule: rgba(242, 239, 233, 0.14);
  --rule-strong: rgba(242, 239, 233, 0.32);
  --cursor-blend: difference;
}

[data-theme="light"] {
  --bg: var(--paper);
  --fg: var(--ink);
  --muted: var(--grey-500);
  --dim: var(--grey-400);
  --surface: var(--paper-50);
  --surface-2: var(--grey-100);
  --rule: rgba(10, 10, 11, 0.14);
  --rule-strong: rgba(10, 10, 11, 0.32);
  --cursor-blend: normal;
}

/* ————————————————————————————— RESET / BASE ————————————————————————————— */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--display);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.45;
  overflow-x: clip;
  transition: background 400ms var(--ease), color 400ms var(--ease);
}
@media (hover: hover) and (pointer: fine) { body { cursor: none; } }

::selection { background: var(--fg); color: var(--bg); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: none; }
@media (hover: none) { button, a { cursor: pointer; } }

/* Language visibility: toggled by [data-lang] on <html> */
[data-lang="es"] .lang-en { display: none !important; }
[data-lang="en"] .lang-es { display: none !important; }
.lang-es, .lang-en { transition: opacity .2s var(--ease); }
html.lang-busy .lang-es, html.lang-busy .lang-en { opacity: 0; }

/* ————————————————————————————— SHARED TYPE HELPERS ————————————————————————————— */
.mono { font-family: var(--mono); font-weight: 400; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.mono-sm { font-family: var(--mono); font-weight: 400; font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.serif-i { font-family: var(--serif); font-style: italic; font-weight: 400; }
em.ital { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }

.stop {
  display: inline-block;
  width: .14em; height: .14em;
  border-radius: 50%;
  background: currentColor;
  vertical-align: baseline;
  margin-left: -.02em;
  transform: translateY(-.02em);
}

/* ————————————————————————————— CUSTOM CURSOR ————————————————————————————— */
.cursor, .cursor-ring {
  position: fixed; top: 0; left: 0;
  pointer-events: none; z-index: 9999;
  mix-blend-mode: var(--cursor-blend);
  opacity: 0;
  transition: opacity .3s var(--ease);
}
.cursor.is-ready, .cursor-ring.is-ready { opacity: 1; }
.cursor {
  width: 6px; height: 6px;
  background: var(--fg);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width .2s var(--ease), height .2s var(--ease), opacity .3s var(--ease);
}
.cursor-ring {
  width: 38px; height: 38px;
  border: 1px solid var(--fg);
  border-radius: 50%;
  display: grid; place-items: center;
  transform: translate(-50%, -50%);
  transition: width .3s var(--ease), height .3s var(--ease), opacity .25s var(--ease), background .25s var(--ease);
}
.cursor-ring .label {
  font-family: var(--mono); font-size: 9px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--bg); opacity: 0; transition: opacity .2s var(--ease);
  white-space: nowrap;
}
body.hover-link .cursor { width: 12px; height: 12px; }
body.hover-link .cursor-ring { width: 54px; height: 54px; }
body.hover-view .cursor { opacity: 0; }
body.hover-view .cursor-ring {
  width: 84px; height: 84px;
  background: var(--fg);
  border-color: var(--fg);
}
body.hover-view .cursor-ring .label { opacity: 1; }
@media (hover: none), (pointer: coarse) { .cursor, .cursor-ring { display: none; } }

/* ————————————————————————————— SPLASH / PRELOADER ————————————————————————————— */
.splash {
  position: fixed; inset: 0; z-index: 10000;
  background: var(--bg);
  display: grid; place-items: center;
  animation: splashSafety .01s 4.5s forwards;
}
.splash.is-out {
  opacity: 0; pointer-events: none;
  transform: translateY(-2%);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
@keyframes splashSafety { to { opacity: 0; pointer-events: none; visibility: hidden; } }
.splash-mark {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(64px, 12vw, 140px);
  letter-spacing: -.07em; line-height: 1;
  display: inline-flex; align-items: baseline;
  color: var(--fg);
}
.splash-mark .j, .splash-mark .d {
  display: inline-block;
  opacity: 0; transform: translateY(.3em);
  animation: splashLetter .7s var(--ease) forwards;
}
.splash-mark .d { animation-delay: .12s; }
.splash-mark .stop {
  width: .15em; height: .15em;
  opacity: 0; transform: scale(0);
  animation: splashDot .5s var(--ease) .42s forwards;
}
@keyframes splashLetter { to { opacity: 1; transform: none; } }
@keyframes splashDot { to { opacity: 1; transform: scale(1); } }
.splash-line {
  position: absolute; bottom: 14%; left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--dim);
  overflow: hidden; white-space: nowrap;
}
.splash-line span { display: inline-block; opacity: 0; animation: splashLetter .6s var(--ease) .5s forwards; }

/* ————————————————————————————— SCROLL PROGRESS ————————————————————————————— */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: var(--fg); z-index: 60;
  transition: width .08s linear;
}

/* ————————————————————————————— MARQUEE ————————————————————————————— */
.marquee {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  overflow: hidden; height: 30px;
  display: flex; align-items: center;
}
.marquee-track {
  display: flex; gap: 48px;
  animation: marquee 55s linear infinite;
  white-space: nowrap; color: var(--muted);
  will-change: transform;
}
.marquee-track > span { display: inline-flex; align-items: center; gap: 48px; }
.marquee-track > span::after { content: "✦"; color: var(--dim); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ————————————————————————————— NAVBAR ————————————————————————————— */
.topnav {
  position: fixed; top: 30px; left: 0; right: 0; z-index: 45;
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 16px var(--pad-x);
  transition: background .35s var(--ease), backdrop-filter .35s var(--ease), border-color .35s var(--ease), padding .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.topnav.scrolled {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--rule);
  padding-top: 12px; padding-bottom: 12px;
}
@supports not (backdrop-filter: blur(1px)) { .topnav.scrolled { background: var(--bg); } }

.brand-mark {
  display: inline-flex; align-items: baseline; gap: 2px;
  font-family: var(--display); font-weight: 700;
  font-size: 22px; letter-spacing: -.05em; color: var(--fg);
}
.brand-mark .stop { width: .16em; height: .16em; }

.nav-center { display: flex; align-items: center; gap: 28px; justify-self: center; }
.nav-link {
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted); position: relative; padding: 4px 0;
  transition: color .25s var(--ease);
}
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--fg);
  transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
}
.nav-link:hover { color: var(--fg); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

.nav-right { display: flex; align-items: center; gap: 10px; justify-self: end; }

/* Pill toggles (theme + lang) */
.pill {
  appearance: none; background: transparent;
  border: 1px solid var(--rule-strong); color: var(--fg);
  border-radius: 999px; height: 30px; padding: 0 4px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 6px;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.theme-toggle { padding: 0 12px 0 10px; gap: 8px; }
.theme-toggle .sw { position: relative; width: 22px; height: 12px; border-radius: 99px; background: var(--rule-strong); }
.theme-toggle .sw::after {
  content: ""; position: absolute; top: 1px; left: 1px; width: 10px; height: 10px;
  background: var(--fg); border-radius: 50%; transition: transform .25s var(--ease-io);
}
[data-theme="light"] .theme-toggle .sw::after { transform: translateX(10px); }
.theme-toggle:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.theme-toggle:hover .sw::after { background: var(--bg); }
.theme-toggle .ico-sun, .theme-toggle .ico-moon { display: none; }
[data-theme="dark"] .theme-toggle .ico-moon { display: inline; }
[data-theme="light"] .theme-toggle .ico-sun { display: inline; }

.lang-toggle { padding: 0; overflow: hidden; }
.lang-toggle b {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 28px; font-weight: 500; color: var(--muted);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.lang-toggle b.on { background: var(--fg); color: var(--bg); }

/* Hamburger */
.hamburger {
  display: none; appearance: none; background: transparent; border: 0;
  width: 34px; height: 34px; position: relative;
}
.hamburger span {
  position: absolute; left: 6px; right: 6px; height: 1.5px; background: var(--fg);
  transition: transform .35s var(--ease), opacity .25s var(--ease);
}
.hamburger span:nth-child(1) { top: 12px; }
.hamburger span:nth-child(2) { top: 17px; }
.hamburger span:nth-child(3) { top: 22px; }
body.menu-open .hamburger span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
body.menu-open .hamburger span:nth-child(2) { opacity: 0; }
body.menu-open .hamburger span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* Mobile full-screen menu */
.mobile-menu {
  position: fixed; inset: 0; z-index: 44;
  background: var(--bg);
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--pad-x);
  clip-path: inset(0 0 100% 0);
  transition: clip-path .55s var(--ease-io);
  pointer-events: none;
}
body.menu-open .mobile-menu { clip-path: inset(0 0 0 0); pointer-events: auto; }
.mobile-menu a {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(36px, 9vw, 64px); letter-spacing: -.04em;
  padding: 8px 0; color: var(--fg);
  opacity: 0; transform: translateY(20px);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.mobile-menu a em { font-family: var(--serif); font-style: italic; font-weight: 400; }
body.menu-open .mobile-menu a { opacity: 1; transform: none; }
body.menu-open .mobile-menu a:nth-child(1) { transition-delay: .15s; }
body.menu-open .mobile-menu a:nth-child(2) { transition-delay: .22s; }
body.menu-open .mobile-menu a:nth-child(3) { transition-delay: .29s; }
body.menu-open .mobile-menu a:nth-child(4) { transition-delay: .36s; }
.mobile-menu .mm-foot {
  margin-top: auto; padding-top: 24px; border-top: 1px solid var(--rule);
  display: flex; gap: 20px; font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
}

/* ————————————————————————————— LAYOUT PRIMITIVES ————————————————————————————— */
.section { position: relative; padding-inline: var(--pad-x); }
.divider { height: 1px; background: var(--rule); border: 0; margin: 0; }

.section-head {
  display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: var(--col-gap);
  align-items: end;
  padding-block: clamp(56px, 8vw, 110px) clamp(36px, 5vw, 64px);
}
.section-head .num { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.section-head h2 {
  margin: 0; font-family: var(--display); font-weight: 500;
  font-size: clamp(34px, 5.2vw, 78px); line-height: .95; letter-spacing: -.04em;
}
.section-head h2 em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
.section-head .meta {
  font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted); justify-self: end; text-align: right; line-height: 1.9;
}

/* ————————————————————————————— HERO ————————————————————————————— */
.hero {
  position: relative; min-height: 100svh;
  padding: calc(30px + 96px) var(--pad-x) clamp(32px, 5vw, 64px);
  display: grid; grid-template-rows: 1fr auto;
  overflow: clip;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 70% at 78% 18%, color-mix(in srgb, var(--fg) 7%, transparent) 0%, transparent 60%),
    radial-gradient(50% 60% at 12% 90%, color-mix(in srgb, var(--fg) 5%, transparent) 0%, transparent 55%);
}
.hero-bg::before {
  content: ""; position: absolute; inset: -20%;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 1px, transparent 1px calc(100% / 11)),
    repeating-linear-gradient(90deg, transparent 0 1px, transparent 1px calc(100% / 7));
  background-size: 100% 9.09%, 14.28% 100%;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 0%, transparent 75%);
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 0%, transparent 75%);
  opacity: .5;
}
.hero-noise {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}
.hero-inner { position: relative; z-index: 1; display: flex; flex-direction: column; justify-content: flex-end; }

.hero-eyebrow {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
  margin-bottom: clamp(20px, 3vw, 36px);
}
.hero-eyebrow .avail { display: inline-flex; align-items: center; gap: 8px; color: var(--fg); }
.hero-eyebrow .avail::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--fg);
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.8); } }

.hero-title { margin: 0; line-height: .82; }
.hero-title .line {
  display: block; font-family: var(--display); font-weight: 700;
  font-size: clamp(64px, 15vw, 240px); letter-spacing: -.06em;
}
.hero-title .line.two { color: var(--muted); }
.hero-title .line.two .ink { color: var(--fg); }
.hero-title .word, .hero-title .stop {
  display: inline-block;
  opacity: 0; transform: translateY(.42em) rotate(2deg);
}
.hero-title.in .word { animation: heroWord .9s var(--ease) forwards; }
.hero-title.in .stop { animation: heroDot .6s var(--ease) forwards; }
@keyframes heroWord { to { opacity: 1; transform: none; } }
@keyframes heroDot { to { opacity: 1; transform: none; } }

.hero-role {
  margin: clamp(18px, 2.4vw, 30px) 0 0;
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-size: clamp(22px, 3.4vw, 48px); letter-spacing: -.01em; line-height: 1.05; color: var(--fg);
}

.hero-foot {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.5fr 1fr; gap: var(--col-gap);
  align-items: end;
  margin-top: clamp(28px, 5vw, 56px);
  padding-top: 22px; border-top: 1px solid var(--rule);
}
.hero-sub {
  max-width: 42ch; font-family: var(--display); font-weight: 400;
  font-size: clamp(15px, 1.5vw, 20px); line-height: 1.5; color: var(--fg);
}
.hero-sub em { font-family: var(--serif); font-style: italic; }
.hero-ctas { display: flex; gap: 12px; justify-self: end; flex-wrap: wrap; }

.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  padding: 14px 22px; border-radius: 999px; border: 1px solid var(--rule-strong);
  color: var(--fg); background: transparent;
  transition: transform .3s var(--ease), background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.btn .arr { transition: transform .3s var(--ease); }
.btn:hover { transform: scale(1.04); }
.btn:hover .arr { transform: translateX(4px); }
.btn-primary { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn-primary:hover { background: color-mix(in srgb, var(--fg) 84%, var(--bg)); }
.btn-ghost:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn .ripple { position: absolute; border-radius: 50%; transform: scale(0); background: color-mix(in srgb, var(--bg) 35%, transparent); animation: ripple .6s var(--ease); pointer-events: none; }
.btn-primary .ripple { background: color-mix(in srgb, var(--bg) 30%, transparent); }
@keyframes ripple { to { transform: scale(2.6); opacity: 0; } }

.hero-scroll {
  position: absolute; left: var(--pad-x); bottom: clamp(20px, 3vw, 34px); z-index: 1;
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--dim);
  display: flex; align-items: center; gap: 10px;
}
.hero-scroll .bar { width: 1px; height: 28px; background: var(--rule-strong); position: relative; overflow: hidden; }
.hero-scroll .bar::after { content: ""; position: absolute; inset: 0; background: var(--fg); animation: scrollBar 2.2s var(--ease) infinite; }
@keyframes scrollBar { 0% { transform: translateY(-100%); } 50% { transform: translateY(0); } 100% { transform: translateY(100%); } }

/* ————————————————————————————— PROJECTS ————————————————————————————— */
.filters { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: clamp(28px, 4vw, 48px); }
.filter-btn {
  appearance: none; background: transparent; border: 1px solid var(--rule-strong);
  color: var(--muted); border-radius: 999px; padding: 9px 16px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase;
  transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.filter-btn:hover { color: var(--fg); border-color: var(--fg); }
.filter-btn.active { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.work-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(18px, 2.2vw, 36px);
  padding-bottom: clamp(56px, 8vw, 110px);
}
.work-card {
  position: relative; display: flex; flex-direction: column;
  border: 1px solid var(--rule); background: var(--surface);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), border-color .35s var(--ease), opacity .4s var(--ease);
  will-change: transform;
}
.work-card:hover {
  transform: scale(1.015) translateY(-4px);
  box-shadow: 0 28px 60px -30px color-mix(in srgb, var(--ink) 70%, transparent);
  border-color: var(--rule-strong);
}
[data-theme="light"] .work-card:hover { box-shadow: 0 30px 60px -32px rgba(10,10,11,.28); }
.work-card.hide { display: none; }

.work-cover {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  border-bottom: 1px solid var(--rule);
}
.work-cover .art {
  position: absolute; inset: 0; transition: transform .8s var(--ease);
  display: grid; place-items: center;
}
.work-card:hover .work-cover .art { transform: scale(1.06); }
.work-cover .crop { position: absolute; width: 14px; height: 14px; border: 1px solid var(--muted); z-index: 2; }
.work-cover .crop.tl { top: 12px; left: 12px; border-right: 0; border-bottom: 0; }
.work-cover .crop.tr { top: 12px; right: 12px; border-left: 0; border-bottom: 0; }
.work-cover .crop.bl { bottom: 12px; left: 12px; border-right: 0; border-top: 0; }
.work-cover .crop.br { bottom: 12px; right: 12px; border-left: 0; border-top: 0; }
.work-cover .cover-glyph {
  font-family: var(--display); font-weight: 700; letter-spacing: -.06em;
  font-size: clamp(40px, 7vw, 96px); color: var(--fg); opacity: .9; line-height: .9; text-align: center;
}
.work-cover .cover-id {
  position: absolute; top: 14px; left: 16px; z-index: 2;
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.work-cover .overlay {
  position: absolute; inset: 0; z-index: 3;
  background: color-mix(in srgb, var(--ink) 42%, transparent);
  display: grid; place-items: center; opacity: 0;
  transition: opacity .4s var(--ease);
}
.work-cover .overlay .go {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--paper);
  border: 1px solid rgba(242,239,233,.5); border-radius: 999px; padding: 12px 20px;
  display: inline-flex; gap: 8px; align-items: center;
  transform: translateY(8px); transition: transform .4s var(--ease);
}
.work-card:hover .work-cover .overlay { opacity: 1; }
.work-card:hover .work-cover .overlay .go { transform: none; }

/* Cover moods — monochrome texture placeholders */
.cover-a { background: radial-gradient(80% 100% at 30% 20%, var(--grey-800) 0%, var(--ink) 75%); }
.cover-b { background: radial-gradient(70% 90% at 70% 30%, var(--grey-700) 0%, var(--ink) 70%); }
.cover-c { background: linear-gradient(155deg, var(--grey-800), var(--ink)); }
.cover-d { background: radial-gradient(90% 80% at 40% 80%, var(--grey-700) 0%, var(--ink) 72%); }
.cover-tex {
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(135deg, transparent 0 8px, color-mix(in srgb, var(--fg) 4%, transparent) 8px 9px);
}
[data-theme="light"] .cover-a { background: radial-gradient(80% 100% at 30% 20%, var(--grey-100) 0%, var(--grey-200) 78%); }
[data-theme="light"] .cover-b { background: radial-gradient(70% 90% at 70% 30%, var(--paper-50) 0%, var(--grey-200) 72%); }
[data-theme="light"] .cover-c { background: linear-gradient(155deg, var(--grey-100), var(--grey-200)); }
[data-theme="light"] .cover-d { background: radial-gradient(90% 80% at 40% 80%, var(--paper-50) 0%, var(--grey-200) 74%); }

.work-body { padding: clamp(18px, 1.8vw, 26px); display: flex; flex-direction: column; gap: 14px; }
.work-top { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; }
.work-name { font-family: var(--display); font-weight: 500; font-size: clamp(22px, 2.2vw, 30px); letter-spacing: -.03em; line-height: 1; }
.work-year { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; color: var(--muted); }
.work-role { font-family: var(--serif); font-style: italic; font-size: clamp(15px, 1.4vw, 18px); color: var(--muted); }
.work-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 2px; }
.work-tags span {
  font-family: var(--mono); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
  border: 1px solid var(--rule); border-radius: 999px; padding: 5px 9px;
}
.work-link-note { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); display: inline-flex; gap: 6px; align-items: center; }

/* ————————————————————————————— ABOUT ————————————————————————————— */
.about-grid {
  display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(28px, 4vw, 72px);
  padding-bottom: clamp(40px, 6vw, 80px);
}
.about-photo { position: relative; }
.about-photo .frame {
  position: relative; aspect-ratio: 4 / 5; overflow: hidden;
  border: 1px solid var(--rule-strong); background: var(--surface-2);
}
.about-photo .frame img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.02); transition: filter .5s var(--ease); }
.about-photo .frame:hover img { filter: grayscale(.55) contrast(1.05); }
.about-photo .ph-fallback {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-family: var(--display); font-weight: 700; font-size: clamp(64px, 9vw, 120px);
  letter-spacing: -.06em; color: var(--fg); opacity: .9;
}
.about-photo .crop { position: absolute; width: 14px; height: 14px; border: 1px solid var(--muted); z-index: 2; }
.about-photo .crop.tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.about-photo .crop.tr { top: 10px; right: 10px; border-left: 0; border-bottom: 0; }
.about-photo .crop.bl { bottom: 10px; left: 10px; border-right: 0; border-top: 0; }
.about-photo .crop.br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }
.about-photo .cap {
  position: absolute; bottom: 12px; left: 14px; z-index: 2;
  font-family: var(--mono); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
}
.about-text { display: flex; flex-direction: column; gap: clamp(24px, 3vw, 38px); }
.about-lead { font-family: var(--display); font-size: clamp(17px, 1.7vw, 22px); line-height: 1.5; color: var(--fg); max-width: 52ch; }
.about-lead em { font-family: var(--serif); font-style: italic; }

.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.fact { background: var(--bg); padding: 20px 18px; }
.fact .n { font-family: var(--display); font-weight: 500; font-size: clamp(34px, 4.5vw, 56px); letter-spacing: -.04em; line-height: 1; }
.fact .n .plus { color: var(--muted); }
.fact .k { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-top: 10px; }

.interests { display: flex; flex-direction: column; gap: 14px; }
.interests .lbl, .edu .lbl, .about-block .lbl { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.interest-row { display: flex; flex-wrap: wrap; gap: 10px; }
.interest {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid var(--rule-strong); border-radius: 999px; padding: 10px 16px 10px 13px;
  font-family: var(--display); font-size: 14px; letter-spacing: -.01em;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.interest svg { width: 18px; height: 18px; transition: transform .35s var(--ease); }
.interest:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.interest:hover svg { transform: rotate(-12deg) scale(1.12); }

.edu-list { display: flex; flex-direction: column; }
.edu-item { display: grid; grid-template-columns: auto 1fr; gap: 16px; padding: 16px 0; border-top: 1px solid var(--rule); align-items: baseline; }
.edu-item:last-child { border-bottom: 1px solid var(--rule); }
.edu-item .deg { font-family: var(--display); font-weight: 500; font-size: clamp(16px, 1.5vw, 20px); letter-spacing: -.02em; }
.edu-item .deg em { font-family: var(--serif); font-style: italic; font-weight: 400; }
.edu-item .inst { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.edu-item .yr { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; color: var(--muted); white-space: nowrap; }

.about-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.text-link {
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
  display: inline-flex; gap: 7px; align-items: center; position: relative; padding-bottom: 3px;
}
.text-link::after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px; background: var(--fg); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.text-link:hover { color: var(--fg); }
.text-link:hover::after { transform: scaleX(1); }

/* ————————————————————————————— CONTACT ————————————————————————————— */
.contact { padding-bottom: clamp(48px, 7vw, 96px); }
.contact-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
.contact-headline { font-family: var(--display); font-weight: 500; font-size: clamp(40px, 7vw, 110px); line-height: .92; letter-spacing: -.05em; margin: 0 0 28px; }
.contact-headline em { font-family: var(--serif); font-style: italic; font-weight: 400; }
.contact-email {
  display: inline-block; font-family: var(--display); font-weight: 500;
  font-size: clamp(20px, 2.4vw, 34px); letter-spacing: -.02em; margin-bottom: 22px;
  position: relative; padding-bottom: 4px;
}
.contact-email::after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px; background: var(--fg); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease); }
.contact-email:hover::after { transform: scaleX(1); }
.contact-socials { display: flex; gap: 18px; }

.form { display: flex; flex-direction: column; gap: 22px; }
.field { position: relative; }
.field input, .field textarea {
  width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--rule-strong);
  color: var(--fg); font-family: var(--display); font-size: 16px; padding: 12px 0; resize: vertical;
  transition: border-color .3s var(--ease);
}
.field textarea { min-height: 96px; }
.field input:focus, .field textarea:focus { outline: none; }
.field label {
  position: absolute; left: 0; top: 12px; pointer-events: none;
  font-family: var(--mono); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted);
  transition: transform .3s var(--ease), font-size .3s var(--ease), color .3s var(--ease);
}
.field input:focus + label, .field input:not(:placeholder-shown) + label,
.field textarea:focus + label, .field textarea:not(:placeholder-shown) + label {
  transform: translateY(-26px); font-size: 9px; color: var(--fg);
}
.field .underline { position: absolute; left: 0; bottom: 0; height: 1px; width: 100%; background: var(--fg); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease); }
.field input:focus ~ .underline, .field textarea:focus ~ .underline { transform: scaleX(1); }
.form .btn { align-self: flex-start; }
.form-note { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--dim); min-height: 14px; }
.form-note.ok { color: var(--fg); }

/* ————————————————————————————— FOOTER ————————————————————————————— */
.footer { padding: clamp(48px, 7vw, 90px) var(--pad-x) clamp(28px, 4vw, 44px); border-top: 1px solid var(--rule); }
.footer-word { font-family: var(--display); font-weight: 700; font-size: clamp(72px, 16vw, 220px); letter-spacing: -.07em; line-height: .82; margin-bottom: clamp(28px, 4vw, 48px); }
.footer-row { display: flex; justify-content: space-between; align-items: end; flex-wrap: wrap; gap: 18px; padding-top: 22px; border-top: 1px solid var(--rule-strong); }
.footer-row .copy { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.footer-socials { display: flex; gap: 18px; }
.footer-social { transition: transform .3s var(--ease), color .25s var(--ease); display: inline-flex; }
.footer-social:hover { transform: scale(1.18); color: var(--fg); }

/* ————————————————————————————— REVEAL ————————————————————————————— */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; } /* defensive (gotcha A.4.5) */
.stagger > * { opacity: 0; transform: translateY(34px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.stagger.in > * { opacity: 1; transform: none; }

/* ============================================================================
   CASE STUDY
   ========================================================================== */
.cs-hero { position: relative; min-height: 78svh; display: grid; align-items: end; padding: calc(30px + 90px) var(--pad-x) clamp(36px, 5vw, 64px); overflow: clip; border-bottom: 1px solid var(--rule); }
.cs-hero .cover-bg { position: absolute; inset: 0; z-index: 0; }
.cs-hero .cover-tex { position: absolute; inset: 0; z-index: 0; }
.cs-hero-inner { position: relative; z-index: 1; }
.cs-back { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); display: inline-flex; gap: 8px; align-items: center; margin-bottom: clamp(20px, 3vw, 36px); transition: color .25s var(--ease); }
.cs-back:hover { color: var(--fg); }
.cs-eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.cs-title { font-family: var(--display); font-weight: 600; font-size: clamp(48px, 10vw, 160px); letter-spacing: -.05em; line-height: .86; margin: 0; }
.cs-tagline { font-family: var(--serif); font-style: italic; font-size: clamp(20px, 3vw, 40px); color: var(--muted); margin-top: 18px; max-width: 26ch; }

.cs-summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--rule); border-bottom: 1px solid var(--rule); }
.cs-summary .cell { background: var(--bg); padding: clamp(20px, 3vw, 36px) var(--pad-x); }
.cs-summary .cell:not(:first-child) { padding-inline: clamp(16px, 2vw, 28px); }
.cs-summary .k { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.cs-summary .v { font-family: var(--display); font-size: clamp(14px, 1.3vw, 17px); letter-spacing: -.01em; line-height: 1.4; }

.cs-body { display: grid; grid-template-columns: 240px 1fr; gap: clamp(28px, 4vw, 72px); padding: clamp(48px, 7vw, 100px) var(--pad-x); align-items: start; }
.cs-toc { position: sticky; top: 110px; display: flex; flex-direction: column; gap: 4px; }
.cs-toc .toc-lbl { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.cs-toc a { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); padding: 8px 0 8px 16px; border-left: 1px solid var(--rule); transition: color .25s var(--ease), border-color .25s var(--ease); }
.cs-toc a .n { color: var(--dim); margin-right: 8px; }
.cs-toc a:hover { color: var(--fg); }
.cs-toc a.active { color: var(--fg); border-left-color: var(--fg); }

.cs-content { display: flex; flex-direction: column; gap: clamp(48px, 7vw, 96px); min-width: 0; }
.cs-section { scroll-margin-top: 110px; }
.cs-section .sec-num { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.cs-section h2 { font-family: var(--display); font-weight: 500; font-size: clamp(28px, 3.6vw, 52px); letter-spacing: -.03em; line-height: 1; margin: 0 0 24px; }
.cs-section h2 em { font-family: var(--serif); font-style: italic; font-weight: 400; }
.cs-section p { font-family: var(--display); font-size: clamp(15px, 1.4vw, 18px); line-height: 1.6; color: var(--fg); max-width: 64ch; margin: 0 0 18px; }
.cs-section p.muted { color: var(--muted); }

.cs-figure { position: relative; border: 1px solid var(--rule-strong); overflow: hidden; margin: clamp(24px, 3vw, 40px) 0; background: var(--surface-2); }
.cs-figure .ph { aspect-ratio: 16 / 9; display: grid; place-items: center; }
.cs-figure .ph .glyph { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.cs-figure figcaption { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding: 12px 16px; border-top: 1px solid var(--rule); }
.cs-figure .parl { position: absolute; inset: -8% 0; will-change: transform; }
.cs-figrow { display: grid; grid-template-columns: 1fr 1fr; gap: var(--col-gap); }
.cs-figrow .cs-figure { margin: clamp(24px, 3vw, 40px) 0 0; }

/* before/after slider */
.ba { position: relative; aspect-ratio: 16 / 9; overflow: hidden; border: 1px solid var(--rule-strong); margin: clamp(24px, 3vw, 40px) 0; user-select: none; touch-action: none; }
.ba .layer { position: absolute; inset: 0; display: grid; place-items: center; }
.ba .after { background: var(--surface-2); }
.ba .before { background: var(--surface); clip-path: inset(0 50% 0 0); }
.ba .layer .glyph { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.ba .badge { position: absolute; top: 12px; font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); z-index: 4; }
.ba .badge.b { left: 14px; } .ba .badge.a { right: 14px; }
.ba .handle { position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; background: var(--fg); z-index: 5; transform: translateX(-50%); }
.ba .handle .grip { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 40px; height: 40px; border-radius: 50%; background: var(--fg); color: var(--bg); display: grid; place-items: center; font-family: var(--mono); font-size: 14px; }

.cs-nav { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: var(--col-gap); padding: clamp(36px, 5vw, 64px) var(--pad-x); border-top: 1px solid var(--rule); }
.cs-nav a { font-family: var(--display); font-weight: 500; font-size: clamp(15px, 1.6vw, 22px); letter-spacing: -.02em; color: var(--muted); transition: color .25s var(--ease); display: inline-flex; flex-direction: column; gap: 6px; }
.cs-nav a .sm { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); }
.cs-nav a:hover { color: var(--fg); }
.cs-nav .next { text-align: right; align-items: flex-end; }
.cs-nav .all { justify-self: center; font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }

/* ————————————————————————————— RESPONSIVE ————————————————————————————— */
@media (max-width: 1080px) {
  .section-head { grid-template-columns: 1fr; gap: 16px; }
  .section-head .meta { justify-self: start; text-align: left; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .cs-summary { grid-template-columns: repeat(2, 1fr); }
  .cs-body { grid-template-columns: 1fr; }
  .cs-toc { display: none; }
}
@media (max-width: 860px) {
  .nav-center { display: none; }
  .hamburger { display: block; }
  .marquee { display: none; }
  .topnav { top: 0; }
  .hero { padding-top: 110px; }
  .cs-hero { padding-top: 110px; }
  .hero-foot { grid-template-columns: 1fr; gap: 22px; }
  .hero-ctas { justify-self: start; }
  .work-grid { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
  .cs-figrow { grid-template-columns: 1fr; }
  .nav-right .theme-toggle span#themeLabel { display: none; }
}
@media (max-width: 480px) {
  .cs-summary { grid-template-columns: 1fr; }
  .hero-title .line { font-size: clamp(52px, 17vw, 90px); }
}
