:root {
  --bg: #f4f2ed;          /* warm off-white */
  --bg-elev: #ebe8e1;
  --fg: #14130f;          /* near-black ink */
  --fg-mute: #6c6a63;
  --fg-dim: #a8a59c;
  --line: #e2dfd7;
  --line-strong: #d4d0c5;
  --accent: #4a36c4;      /* deeper indigo for contrast on warm white */
  --accent-ink: #f4f2ed;
  --serif: "Instrument Serif", "Times New Roman", serif;
  --sans: "Inter Tight", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); }
body {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.mono { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-mute); }
.serif { font-family: var(--serif); font-weight: 400; font-style: normal; letter-spacing: -0.015em; }
.italic { font-style: italic; }

/* ---------- NAV ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 40px;
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  background: linear-gradient(to bottom, rgba(244,242,237,0.85), rgba(244,242,237,0));
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: lowercase;
}
.nav-brand-mark {
  width: 18px; height: 18px;
  border: 1px solid var(--fg);
  display: grid; place-items: center;
  font-size: 9px;
  letter-spacing: 0;
  font-weight: 500;
}
.nav-links {
  display: flex; gap: 36px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.nav-links a { position: relative; padding: 4px 0; transition: color 0.2s; }
.nav-links a:hover { color: var(--fg); }
.nav-links a.active { color: var(--fg); }
.nav-links a.active::after {
  content: "";
}

.nav-links a.active::before {
  content: ""; position: absolute; left: -14px; top: 50%;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent);
  transform: translateY(-50%);
}
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--fg);
  color: var(--bg);
  font-size: 13px;
  font-weight: 500;
  border: none;
  transition: transform 0.2s ease, background 0.2s;
}
.pill:hover { transform: translateY(-1px); background: var(--accent); color: #fff; }
.pill.ghost {
  background: rgba(255,255,255,0.5);
  color: var(--fg);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(10px);
}
.pill.ghost:hover { background: rgba(255,255,255,0.85); border-color: var(--fg-mute); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  padding: 0 40px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute; inset: 0;
  z-index: -1;
}
.hero-bg canvas { width: 100%; height: 100%; display: block; }
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(244,242,237,0) 0%, rgba(244,242,237,0.35) 70%, rgba(244,242,237,0.85) 100%);
  pointer-events: none;
}
.hero-grain {
  position: absolute; inset: 0;
  opacity: 0.06;
  mix-blend-mode: multiply;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.6 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
}

.hero-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-mute);
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 36px;
}
.hero-label::before, .hero-label::after {
  content: ""; width: 40px; height: 1px; background: var(--line-strong);
}
.hero-headline {
  font-family: var(--serif);
  font-size: clamp(60px, 10vw, 160px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.03em;
  text-align: center;
  margin: 0 0 0.15em;
  color: var(--fg);
  max-width: 1200px;
  text-wrap: balance;
  padding-bottom: 0.35em;
}
.hero-headline .accent {
  font-style: italic;
  color: #4a36c4;
  font-weight: 500;
}
.hero-sub {
  margin-top: 56px;
  font-size: 17px;
  color: var(--fg-mute);
  text-align: center;
  max-width: 540px;
  line-height: 1.6;
  text-wrap: pretty;
}
.hero-ctas {
  margin-top: 44px;
  display: flex; gap: 12px;
}

.hero-bottombar {
  position: absolute; bottom: 24px; left: 40px; right: 40px;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.hero-scroll { display: flex; align-items: center; gap: 10px; }
.hero-scroll .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 0.3; } 50% { opacity: 1; } }

/* ---------- SECTION STRUCTURE ---------- */
.section {
  padding: 140px 40px;
  position: relative;
  border-top: 1px solid var(--line);
}
.section-head {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 80px;
  max-width: 1400px;
  margin-left: auto; margin-right: auto;
}
.section-head-index { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--fg-mute); text-transform: uppercase; }
.section-head-title {
  font-family: var(--serif);
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0;
}
.section-head-title .italic { font-style: italic; color: var(--accent); }
.section-head-sub {
  margin-top: 20px;
  color: var(--fg-mute);
  max-width: 520px;
  font-size: 15px;
}

/* ---------- FILTER TABS ---------- */
.tabs {
  display: flex; gap: 4px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255,255,255,0.6);
  width: fit-content;
  margin: 0 auto 60px;
}
.tab {
  padding: 8px 18px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-mute);
  background: transparent;
  border: none;
  transition: all 0.2s;
}
.tab:hover { color: var(--fg); }
.tab.active { background: var(--fg); color: var(--bg); }

/* ---------- PROJECTS GRID ---------- */
.projects-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.55);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.3s, box-shadow 0.3s;
  cursor: pointer;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 18px 40px -20px rgba(20,19,15,0.18);
}
.project-card:hover .card-title { color: var(--accent); }
.project-card:hover .thumb-inner { transform: scale(1.04); }

.thumb {
  position: relative;
  aspect-ratio: 4 / 2.4;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
}
.thumb-inner {
  position: absolute;
  inset: 0;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.kind-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255,253,248,0.85);
  color: var(--fg);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(6px);
}
.kind-badge.educatee {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.card-body {
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.card-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 6px;
}
.card-title {
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
  font-weight: 400;
  transition: color 0.25s;
}
.card-en {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--fg-mute);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.card-desc {
  font-size: 13px;
  color: var(--fg-mute);
  line-height: 1.55;
  margin: 0 0 16px;
  flex: 1;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg-mute);
}

/* ---------- CONTACT ---------- */
.contact {
  padding: 180px 40px 60px;
  position: relative;
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.contact-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}
.contact-big {
  font-family: var(--serif);
  font-size: clamp(52px, 7vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}
.contact-big .italic { font-style: normal; color: var(--accent); }
.contact-meta { display: flex; flex-direction: column; gap: 32px; padding-top: 20px; }
.contact-row {
  display: grid; grid-template-columns: 100px 1fr auto;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
  transition: color 0.25s;
}
.contact-row:last-child { border-bottom: 1px solid var(--line); }
.contact-row:hover { color: var(--accent); }
.contact-row .label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-mute); }
.contact-row .val { font-family: var(--serif); font-size: 22px; letter-spacing: -0.01em; }
.contact-row .ext { font-family: var(--mono); font-size: 11px; color: var(--fg-dim); }

.footer {
  max-width: 1400px;
  margin: 120px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* ---------- TWEAKS PANEL ---------- */
.tweaks-panel {
  position: fixed; right: 24px; bottom: 24px;
  width: 280px;
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(255,253,248,0.92);
  backdrop-filter: blur(20px);
  z-index: 100;
  font-size: 13px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.12);
  display: none;
}
.tweaks-panel.visible { display: block; }
.tweaks-row input {
  background: rgba(0,0,0,0.04) !important;
  border: 1px solid var(--line-strong) !important;
  color: var(--fg) !important;
}
.tweaks-panel h3 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-mute); margin: 0 0 14px; }
.tweaks-row { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.tweaks-row label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-dim); }
.tweaks-swatches { display: flex; gap: 8px; }
.swatch {
  width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--line-strong);
  cursor: pointer; transition: transform 0.2s, border-color 0.2s;
}
.swatch:hover { transform: scale(1.1); }
.swatch.active { border-color: var(--fg); border-width: 2px; }
.seg {
  display: flex; gap: 2px;
  padding: 2px; border: 1px solid var(--line-strong); border-radius: 8px;
}
.seg button {
  flex: 1; padding: 6px 10px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  background: transparent; border: none; color: var(--fg-mute); border-radius: 6px;
}
.seg button.active { background: var(--fg); color: var(--bg); }

/* ---------- RESPONSIVE ---------- */
/* large desktop down to laptop: 4 cols → 3 cols already default */
@media (max-width: 1280px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .section, .contact { padding: 120px 32px; }
  .nav { padding: 20px 32px; }
}

/* tablet */
@media (max-width: 900px) {
  .nav { padding: 16px 20px; }
  .nav-links { display: none; }
  .nav-brand { gap: 8px; }
  .section, .contact { padding: 90px 20px; }
  .section-head { grid-template-columns: 1fr; gap: 14px; margin-bottom: 48px; }
  .contact-inner { grid-template-columns: 1fr; gap: 56px; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }

  .hero { padding: 0 20px; min-height: 92vh; }
  .hero-label { margin-bottom: 24px; font-size: 10px; }
  .hero-headline { font-size: clamp(48px, 12vw, 92px); padding-bottom: 0.3em; }
  .hero-sub { font-size: 15px; margin-top: 32px; padding: 0 8px; }
  .hero-ctas { margin-top: 32px; flex-wrap: wrap; justify-content: center; }
  .hero-bottombar { position: static; padding: 30px 0 0; flex-direction: column; gap: 10px; align-items: flex-start; }

  .tabs { width: 100%; overflow-x: auto; justify-content: flex-start; -webkit-overflow-scrolling: touch; }
  .tabs::-webkit-scrollbar { display: none; }
  .tab { white-space: nowrap; flex-shrink: 0; }

  .contact-big { font-size: clamp(40px, 9vw, 64px); }
  .contact-row { grid-template-columns: 90px 1fr; row-gap: 6px; }
  .contact-row .ext { grid-column: 2; font-size: 10px; }
  .contact-row .val { font-size: 18px; }

  .footer { flex-direction: column; gap: 12px; align-items: flex-start; margin-top: 80px; text-align: left; }
}

/* phone */
@media (max-width: 640px) {
  .nav { padding: 14px 16px; }
  .nav .pill { padding: 8px 14px; font-size: 12px; }
  .section, .contact { padding: 72px 16px; }

  .projects-grid { grid-template-columns: 1fr; gap: 18px; }
  .project-card { border-radius: 12px; }
  .card-body { padding: 18px 18px 22px; }
  .card-title { font-size: 24px; }
  .thumb { aspect-ratio: 4 / 2.2; }

  .hero { padding: 0 16px; }
  .hero-headline { font-size: clamp(40px, 14vw, 64px); line-height: 1.05; padding-bottom: 0.4em; }
  .hero-sub { font-size: 14px; margin-top: 24px; }
  .hero-ctas .pill { padding: 11px 18px; font-size: 12px; }

  .section-head-title { font-size: clamp(36px, 9vw, 52px); }
  .section-head-sub { font-size: 14px; }

  .contact-big { font-size: clamp(36px, 11vw, 52px); }

  .tweaks-panel { right: 12px; bottom: 12px; left: 12px; width: auto; }
}

/* tiny */
@media (max-width: 380px) {
  .hero-headline { font-size: 38px; }
  .hero-label::before, .hero-label::after { width: 20px; }
  .hero-bottombar { display: none; }
  .nav-brand { font-size: 11px; }
}