/* =========================================================
   Matteo Laurenzi — portfolio
   Editorial design system · light/dark · IT/EN
   ========================================================= */

/* -------- Reset -------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100vh; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; }
ul, ol { padding: 0; margin: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* -------- Tokens -------- */
:root {
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --max: 1240px;
  --pad-x: clamp(20px, 4vw, 56px);

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --t-fast: 180ms;
  --t-med: 320ms;
  --t-slow: 600ms;
  --ease: cubic-bezier(.2,.7,.2,1);

  --shadow-sm: 0 1px 2px rgba(10,12,16,.04), 0 2px 6px rgba(10,12,16,.04);
  --shadow-md: 0 6px 18px rgba(10,12,16,.06), 0 2px 6px rgba(10,12,16,.04);
  --shadow-lg: 0 24px 60px rgba(10,12,16,.10), 0 6px 18px rgba(10,12,16,.06);
}

/* Light theme (default) */
:root, [data-theme="light"] {
  --bg: #faf8f3;
  --bg-2: #f3efe6;
  --surface: #ffffff;
  --surface-2: #fbf9f4;

  --ink: #0e1116;
  --ink-2: #4a4f57;
  --ink-3: #7a7f87;

  --line: rgba(14,17,22,.10);
  --line-strong: rgba(14,17,22,.18);

  --accent: #1a3a52;
  --accent-2: #b8732c;
  --accent-fg: #ffffff;
  --accent-soft: rgba(26,58,82,.08);

  --grid-line: rgba(14,17,22,.045);
}

/* Dark theme */
[data-theme="dark"] {
  --bg: #0c0e12;
  --bg-2: #14171c;
  --surface: #14171c;
  --surface-2: #181b21;

  --ink: #f0ede5;
  --ink-2: #aab1bc;
  --ink-3: #6f7682;

  --line: rgba(240,237,229,.10);
  --line-strong: rgba(240,237,229,.18);

  --accent: #7eb3d6;
  --accent-2: #e8a75c;
  --accent-fg: #0c0e12;
  --accent-soft: rgba(126,179,214,.10);

  --grid-line: rgba(240,237,229,.04);

  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 8px 22px rgba(0,0,0,.45);
  --shadow-lg: 0 30px 80px rgba(0,0,0,.55);
}

/* -------- Base -------- */
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
  transition: background-color var(--t-med) var(--ease), color var(--t-med) var(--ease);
}

p { margin: 0 0 1em; }
em, i { font-family: var(--font-serif); font-style: italic; }
strong { font-weight: 600; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
  font-variation-settings: "opsz" 60;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

/* -------- Skip link -------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 10px 16px;
  z-index: 100;
  border-radius: 0 0 8px 0;
  text-decoration: none;
}
.skip-link:focus { top: 0; }

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-med) var(--ease), background-color var(--t-med) var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  transition: transform var(--t-med) var(--ease), background-color var(--t-med) var(--ease);
}
.brand:hover .brand-mark { transform: rotate(-6deg) scale(1.04); }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: var(--font-serif); font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.brand-sub { font-size: 11px; color: var(--ink-3); letter-spacing: .04em; text-transform: uppercase; }

.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; gap: 6px; }
.primary-nav a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 500;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.primary-nav a:hover { color: var(--ink); background: var(--bg-2); }

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-2);
}
.lang-switch button {
  padding: 2px 6px;
  border-radius: 999px;
  color: var(--ink-3);
  letter-spacing: .04em;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}
.lang-switch button[aria-pressed="true"] { color: var(--ink); background: var(--accent-soft); }
.lang-switch button:hover { color: var(--ink); }

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); background: var(--bg-2); }
.theme-toggle .i-sun, .theme-toggle .i-moon {
  position: absolute;
  inset: 0;
  margin: auto;
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease);
}
[data-theme="light"] .theme-toggle .i-sun { opacity: 1; transform: rotate(0); }
[data-theme="light"] .theme-toggle .i-moon { opacity: 0; transform: rotate(-90deg) scale(.6); }
[data-theme="dark"] .theme-toggle .i-sun { opacity: 0; transform: rotate(90deg) scale(.6); }
[data-theme="dark"] .theme-toggle .i-moon { opacity: 1; transform: rotate(0); }

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line);
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
}
.menu-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.scroll-progress {
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 80ms linear;
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 72px 0 0 0;
  background: var(--bg);
  z-index: 40;
  padding: 24px var(--pad-x);
  overflow-y: auto;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a {
  display: block;
  padding: 16px 0;
  font-family: var(--font-serif);
  font-size: 28px;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  padding: clamp(64px, 12vh, 140px) 0 clamp(80px, 12vh, 140px);
  overflow: hidden;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hero-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-grid {
  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: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000 40%, transparent 80%);
}

.hero-inner { position: relative; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-2);
  background: color-mix(in oklab, var(--surface) 70%, transparent);
}
.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #20a674;
  box-shadow: 0 0 0 4px color-mix(in oklab, #20a674 25%, transparent);
}

.hero-title {
  margin: 28px 0 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(56px, 9vw, 144px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  font-variation-settings: "opsz" 144, "SOFT" 60;
}
.hero-line { display: block; }

.hero-lede {
  margin: 28px 0 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--ink-2);
  max-width: 64ch;
  font-variation-settings: "opsz" 30;
}

.hero-meta {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
  max-width: 700px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.meta-item { display: flex; flex-direction: column; gap: 4px; }
.meta-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.meta-value { font-size: 15px; color: var(--ink); }

.hero-cta {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
  border: 1px solid transparent;
  position: relative;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { background: var(--bg-2); border-color: var(--ink); }

/* Marquee */
.hero-marquee {
  margin-top: 80px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
  overflow: hidden;
  position: relative;
  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: flex;
  gap: 28px;
  white-space: nowrap;
  animation: marquee 38s linear infinite;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: .04em;
  text-transform: uppercase;
  width: max-content;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* =========================================================
   SECTIONS
   ========================================================= */
.section {
  padding: clamp(80px, 12vh, 140px) 0;
  border-top: 1px solid var(--line);
  position: relative;
}
.section-alt { background: var(--bg-2); }

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}

.section-head { position: sticky; top: 96px; }
.section-no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .15em;
  color: var(--ink-3);
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 400;
  letter-spacing: -0.025em;
}
.section-kicker {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--ink-3);
}

/* -------- About -------- */
.about-body .lead {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.35;
  color: var(--ink);
  margin-bottom: 28px;
  max-width: 36ch;
  letter-spacing: -0.01em;
  font-variation-settings: "opsz" 32;
}
.about-body p { color: var(--ink-2); max-width: 60ch; }

.quick-facts {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px,1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.quick-facts li {
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-right: 1px solid var(--line);
}
.quick-facts li:last-child { border-right: 0; }
.quick-facts span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.quick-facts strong {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* -------- Cards -------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  position: relative;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}
.card-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 12px;
  margin-bottom: 18px;
}
.card-icon svg { width: 22px; height: 22px; }
.card-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.card p { color: var(--ink-2); margin: 0; font-size: 15px; }

/* -------- Timeline -------- */
.timeline {
  position: relative;
  padding-left: 8px;
}
.tl-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 24px;
  padding-bottom: 36px;
  position: relative;
}
.tl-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}
.tl-marker {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--accent);
  margin-top: 8px;
  position: relative;
}
.tl-marker::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--accent);
}
.tl-meta {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 10px;
}
.tl-card {
  grid-column: 2;
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.tl-card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.tl-card h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.tl-org { color: var(--accent); font-weight: 500; font-size: 14px; margin: 0 0 12px; }
.tl-desc { color: var(--ink-2); font-size: 15px; margin: 0; }

/* -------- Teaching -------- */
.teach-block {
  margin-bottom: 28px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.teach-block:last-child { margin-bottom: 0; }
.teach-head h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.teach-list { display: flex; flex-direction: column; gap: 14px; }
.teach-list li {
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}
.teach-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.teach-title { font-weight: 500; color: var(--ink); margin-bottom: 4px; }
.teach-meta { color: var(--ink-2); font-size: 14px; }

/* -------- Publications -------- */
.pub-list { border-top: 1px solid var(--line); }
.pub {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
  transition: padding-left var(--t-med) var(--ease);
}
.pub:hover { padding-left: 12px; }
.pub-year {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-3);
  padding-top: 4px;
}
.pub-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: -0.005em;
  margin: 0 0 6px;
}
.pub-authors { color: var(--ink-2); font-size: 14px; margin: 0 0 4px; }
.pub-venue { color: var(--ink-3); font-size: 14px; margin: 0; }
.pub-link {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.pub-link:hover {
  color: var(--accent-fg);
  background: var(--accent);
  border-color: var(--accent);
  transform: translate(2px, -2px);
}

.subheading {
  margin: 64px 0 22px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 26px;
  letter-spacing: -0.01em;
}
.speaking { display: flex; flex-direction: column; gap: 4px; }
.speaking li {
  padding: 18px 0;
  display: grid;
  grid-template-columns: minmax(220px,1fr) 2fr;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.speaking li:last-child { border-bottom: 0; }
.speaking strong { font-weight: 500; color: var(--ink); }
.speaking span { color: var(--ink-2); font-size: 15px; }

/* -------- Skills -------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
  gap: 18px;
}
.skills-block {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.skills-block h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 20px;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.skills-block h3 + h3 { margin-top: 28px; }

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list li {
  padding: 6px 12px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-2);
  font-family: var(--font-mono);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.tag-list li:hover { color: var(--ink); border-color: var(--line-strong); }

.lang-list { display: flex; flex-direction: column; gap: 16px; }
.lang-list li { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; }
.lang-name { font-weight: 500; }
.lang-level {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: .04em;
  text-align: right;
}
.lang-bar {
  grid-column: 1 / -1;
  height: 4px;
  background: var(--bg-2);
  border-radius: 999px;
  overflow: hidden;
}
.lang-bar span {
  display: block;
  height: 100%;
  width: var(--w);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 999px;
}

.muted { color: var(--ink-2); font-size: 14px; }

.edu-list { display: flex; flex-direction: column; }
.edu-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.edu-list li:last-child { border-bottom: 0; }
.edu-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  padding-top: 4px;
}
.edu-title { font-weight: 500; color: var(--ink); margin-bottom: 2px; font-size: 15px; }
.edu-org { color: var(--ink-2); font-size: 13px; }

/* -------- Contact -------- */
.section-contact {
  padding: clamp(80px, 12vh, 140px) 0;
  border-top: 1px solid var(--line);
}
.contact-card {
  position: relative;
  padding: clamp(40px, 6vw, 80px);
  border-radius: var(--r-xl);
  background: var(--ink);
  color: var(--bg);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  overflow: hidden;
  isolation: isolate;
}
.contact-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 0% 100%, color-mix(in oklab, var(--accent) 35%, transparent), transparent 60%),
    radial-gradient(ellipse at 100% 0%, color-mix(in oklab, var(--accent-2) 25%, transparent), transparent 60%);
  z-index: -1;
}
.contact-card .section-no { color: rgba(255,255,255,0.55); }
.contact-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 84px);
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--bg);
}
.contact-lede {
  margin-top: 22px;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.45;
  color: rgba(255,255,255,0.78);
  max-width: 36ch;
}

.contact-actions {
  display: flex;
  flex-direction: column;
  align-self: end;
}
.contact-link {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,0.15);
  text-decoration: none;
  color: var(--bg);
  align-items: center;
  transition: padding-left var(--t-med) var(--ease);
}
.contact-link:not(.static):hover { padding-left: 12px; }
.contact-link:last-child { border-bottom: 1px solid rgba(255,255,255,0.15); }
.contact-key {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: rgba(255,255,255,0.5);
}
.contact-val { font-family: var(--font-serif); font-size: 18px; font-weight: 400; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-3);
}
.foot-name { margin: 0; }
.foot-meta { margin: 0; }
.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 13px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.to-top:hover { color: var(--ink); border-color: var(--line-strong); }

/* =========================================================
   SCROLL REVEAL
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 800ms var(--ease), transform 800ms var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 960px) {
  .section-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-head { position: static; }
  .primary-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .contact-card { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .header-inner { gap: 10px; }
  .brand-sub { display: none; }
  .hero { padding-top: 56px; padding-bottom: 64px; }
  .hero-meta { grid-template-columns: 1fr; gap: 14px; }
  .hero-marquee { margin-top: 56px; }
  .pub { grid-template-columns: 60px 1fr; gap: 16px; }
  .pub-link { grid-column: 2; justify-self: start; }
  .speaking li { grid-template-columns: 1fr; gap: 6px; }
  .quick-facts li { border-right: 0; border-bottom: 1px solid var(--line); }
  .quick-facts li:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .marquee-track { animation: none; }
  .reveal { opacity: 1; transform: none; }
}

/* Print */
@media print {
  .site-header, .site-footer, .hero-cta, .hero-marquee, .theme-toggle, .lang-switch, .menu-toggle, .scroll-progress { display: none !important; }
  body { background: white; color: black; }
  .section { padding: 24px 0; border-top: 1px solid #ccc; }
  a { color: black; text-decoration: underline; }
}