/* ============================================================
   DEMI MAI — DESIGN ARCHITECT PORTFOLIO
   Shared design system
   ============================================================ */

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

:root {
  /* Dark warm neutral palette */
  --bg: oklch(0.13 0.004 80);
  --bg-elevated: oklch(0.16 0.004 80);
  --surface: oklch(0.18 0.004 80);
  --border: oklch(0.26 0.005 80);
  --border-strong: oklch(0.34 0.006 80);
  --text: oklch(0.94 0.006 80);
  --text-muted: oklch(0.68 0.008 80);
  --text-dim: oklch(0.46 0.006 80);
  --accent: #89CA96;
  --accent-dim: oklch(0.62 0.10 145);

  /* Typography */
  --font-sans: 'Geist', system-ui, -apple-system, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', monospace;
  --font-serif: 'Geist', system-ui, -apple-system, sans-serif;

  /* Scale */
  --container: 1400px;
  --gutter: clamp(20px, 4vw, 56px);
  --radius: 2px;
}

[data-theme="light"] {
  --bg: oklch(0.97 0.004 80);
  --bg-elevated: oklch(0.94 0.004 80);
  --surface: oklch(0.91 0.004 80);
  --border: oklch(0.84 0.005 80);
  --border-strong: oklch(0.72 0.006 80);
  --text: oklch(0.18 0.006 80);
  --text-muted: oklch(0.40 0.008 80);
  --text-dim: oklch(0.62 0.006 80);
  --accent: #6EA87A;
  --accent-dim: oklch(0.45 0.10 145);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
  letter-spacing: -0.005em;
  overflow-x: hidden;
}

em, i { font-style: normal; }

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

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-top: 1px solid var(--accent);
  width: 8px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-name {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
}
.logo-role {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
}
.nav a:hover {
  color: var(--text);
}
.nav a.active {
  color: var(--text);
}
.nav a.active::before {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 1px;
  background: var(--accent);
}
.nav-cta {
  margin-left: 12px;
  padding-left: 18px !important;
  border-left: 1px solid var(--border);
  color: var(--text) !important;
}
.nav-cta::after {
  content: " →";
  color: var(--accent);
}

/* Theme toggle (header) */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-left: 6px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.4s cubic-bezier(.2,.7,.2,1);
  font-family: var(--font-mono);
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: color-mix(in oklab, var(--text) 4%, transparent);
}
.theme-toggle:active {
  transform: scale(0.94);
}
.theme-toggle:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}
.theme-toggle svg {
  width: 14px;
  height: 14px;
  display: block;
  transition: opacity 0.25s ease, transform 0.35s cubic-bezier(.2,.7,.2,1);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  inset: 0;
  margin: auto;
}
/* Dark theme → show sun (click to go light) */
.theme-toggle .icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-toggle .icon-moon { opacity: 0; transform: rotate(-60deg) scale(0.6); }
/* Light theme → show moon (click to go dark) */
[data-theme="light"] .theme-toggle .icon-sun { opacity: 0; transform: rotate(60deg) scale(0.6); }
[data-theme="light"] .theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }

[data-motion="off"] .theme-toggle,
[data-motion="off"] .theme-toggle svg {
  transition: none;
}

@media (max-width: 760px) {
  .nav a:not(.nav-cta) {
    display: none;
  }
}

/* ---------- Type ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}
.eyebrow.no-line::before { display: none; }

.section-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

h1, h2, h3, h4 {
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.04;
  color: var(--text);
}

.display-xl {
  font-size: clamp(48px, 7.2vw, 112px);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 0.96;
}
.display-l {
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.02;
}
.display-m {
  font-size: clamp(28px, 3.4vw, 48px);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.08;
}
.display-s {
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.18;
}

.lede {
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 60ch;
}

.italic-serif {
  font-family: var(--font-serif);
  font-style: normal;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--accent);
}

.mono { font-family: var(--font-mono); }
.muted { color: var(--text-muted); }
.dim { color: var(--text-dim); }

/* ---------- Buttons / Links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  border-radius: var(--radius);
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.btn .arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}
.btn:hover .arrow {
  transform: translateX(3px);
}

a.text-link {
  color: var(--text);
  text-decoration: none;
  position: relative;
  border-bottom: 1px solid var(--border-strong);
  transition: border-color 0.2s, color 0.2s;
  padding-bottom: 1px;
}
a.text-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Section primitives ---------- */
section {
  position: relative;
  padding: clamp(140px, 18vh, 220px) 0;
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 40px;
  margin-bottom: clamp(64px, 9vh, 96px);
  align-items: end;
}
.section-head .meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
@media (max-width: 760px) {
  .section-head { grid-template-columns: 1fr; gap: 20px; }
}

/* ---------- Cards / Items ---------- */
.divider {
  height: 1px;
  background: var(--border);
  width: 100%;
}
.divider-strong { background: var(--border-strong); }

.kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  align-items: baseline;
}
.kv:last-child { border-bottom: 1px solid var(--border); }
.kv-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.kv-value {
  font-size: 15px;
  color: var(--text);
}

/* ---------- Hero corner marks ---------- */
.corner-mark {
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.corner-mark::before, .corner-mark::after {
  content: "";
  position: absolute;
  background: var(--border-strong);
}
.corner-mark.tl { top: -1px; left: -1px; }
.corner-mark.tl::before { top: 0; left: 0; width: 14px; height: 1px; }
.corner-mark.tl::after  { top: 0; left: 0; width: 1px; height: 14px; }
.corner-mark.tr { top: -1px; right: -1px; }
.corner-mark.tr::before { top: 0; right: 0; width: 14px; height: 1px; }
.corner-mark.tr::after  { top: 0; right: 0; width: 1px; height: 14px; }
.corner-mark.bl { bottom: -1px; left: -1px; }
.corner-mark.bl::before { bottom: 0; left: 0; width: 14px; height: 1px; }
.corner-mark.bl::after  { bottom: 0; left: 0; width: 1px; height: 14px; }
.corner-mark.br { bottom: -1px; right: -1px; }
.corner-mark.br::before { bottom: 0; right: 0; width: 14px; height: 1px; }
.corner-mark.br::after  { bottom: 0; right: 0; width: 1px; height: 14px; }

/* ---------- Image placeholders ---------- */
.img-slot {
  position: relative;
  width: 100%;
  background:
    repeating-linear-gradient(
      135deg,
      transparent 0 11px,
      color-mix(in oklab, var(--text) 4%, transparent) 11px 12px
    ),
    var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.img-slot::after {
  content: attr(data-label);
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.img-slot .img-slot-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  text-align: center;
  padding: 8px 16px;
  max-width: 80%;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  margin-top: 0;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
}
@media (max-width: 760px) {
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 16px;
  font-weight: 400;
}
.footer-col a {
  display: block;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}
.footer-bottom .status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: oklch(0.7 0.15 145);
  box-shadow: 0 0 0 3px color-mix(in oklab, oklch(0.7 0.15 145) 25%, transparent);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ---------- Reveal on scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s cubic-bezier(.2,.7,.2,1),
    transform 1.0s cubic-bezier(.2,.7,.2,1),
    clip-path 1.1s cubic-bezier(.7,0,.3,1),
    filter 0.9s cubic-bezier(.2,.7,.2,1);
  will-change: transform, opacity;
}
/* Variants */
[data-reveal="up"]    { transform: translateY(36px); }
[data-reveal="down"]  { transform: translateY(-28px); }
[data-reveal="left"]  { transform: translateX(-36px); }
[data-reveal="right"] { transform: translateX(36px); }
[data-reveal="fade"]  { transform: none; filter: blur(6px); }
[data-reveal="scale"] { transform: scale(0.94); }
[data-reveal="clip"]  { opacity: 1; transform: none; clip-path: inset(0 100% 0 0); }
[data-reveal="clip-y"]{ opacity: 1; transform: none; clip-path: inset(100% 0 0 0); }

[data-reveal].in {
  opacity: 1;
  transform: none;
  filter: none;
  clip-path: inset(0 0 0 0);
}

/* Staggered children */
[data-stagger] > * {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.8s cubic-bezier(.2,.7,.2,1),
    transform 0.9s cubic-bezier(.2,.7,.2,1);
  transition-delay: calc(var(--i, 0) * 90ms);
  will-change: transform, opacity;
}
[data-stagger].in > * {
  opacity: 1;
  transform: none;
}

[data-motion="off"] [data-reveal],
[data-motion="off"] [data-stagger] > * {
  opacity: 1;
  transform: none;
  filter: none;
  clip-path: none;
  transition: none;
}

/* Subtle section-head animations */
.section-head .section-index,
.section-head .eyebrow {
  display: inline-block;
}
[data-reveal].in .section-index { animation: dm-slide-in-left 0.9s cubic-bezier(.2,.7,.2,1) both; }
[data-reveal].in .eyebrow       { animation: dm-slide-in-left 0.9s cubic-bezier(.2,.7,.2,1) 0.1s both; }
[data-reveal].in .display-m,
[data-reveal].in .display-l     { animation: dm-rise 1.0s cubic-bezier(.2,.7,.2,1) 0.05s both; }

@keyframes dm-slide-in-left {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: none; }
}
@keyframes dm-rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

[data-motion="off"] [data-reveal].in .section-index,
[data-motion="off"] [data-reveal].in .eyebrow,
[data-motion="off"] [data-reveal].in .display-m,
[data-motion="off"] [data-reveal].in .display-l {
  animation: none;
}

/* Text-link underline reveal */
.text-link {
  position: relative;
  display: inline-block;
}
.text-link::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.5s cubic-bezier(.2,.7,.2,1);
}
.text-link:hover::before { transform: scaleX(1); }
[data-motion="off"] .text-link::before { transition: none; }

/* ---------- Tag chips ---------- */
.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 5px 9px;
  border-radius: var(--radius);
}

/* ---------- Page intro ---------- */
.page-intro {
  padding-top: 180px;
  padding-bottom: 80px;
  border-top: 0;
}

/* ---------- Marquee ticker ---------- */
.ticker {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  padding: 18px 0;
  display: flex;
  gap: 56px;
  white-space: nowrap;
}
.ticker-track {
  display: flex;
  gap: 56px;
  animation: ticker 38s linear infinite;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  flex-shrink: 0;
}
.ticker-track span {
  display: inline-flex;
  align-items: center;
  gap: 56px;
}
.ticker-track span::before {
  content: "◇";
  color: var(--accent);
  font-size: 10px;
}
[data-motion="off"] .ticker-track { animation: none; }
@keyframes ticker {
  to { transform: translateX(-50%); }
}