/* ==========================================================================
   romainpiau.dev — portfolio
   ========================================================================== */

:root {
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 20px;
  --radius-sm: 12px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --container: 1160px;

  --violet: #8b5cf6;
  --cyan: #22d3ee;
  --pink: #f472b6;
  --grad: linear-gradient(120deg, var(--violet), var(--cyan));
}

:root[data-theme="dark"] {
  --bg: #09090f;
  --bg-elev: rgba(255, 255, 255, .035);
  --bg-elev-2: rgba(255, 255, 255, .06);
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .16);
  --text: #ececf1;
  --text-muted: #9a9aab;
  --text-faint: #6b6b7b;
  --nav-bg: rgba(9, 9, 15, .6);
  --blob-opacity: .55;
  --grid-color: rgba(255, 255, 255, .045);
  --shadow: 0 30px 60px -30px rgba(0, 0, 0, .8);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f7fb;
  --bg-elev: rgba(255, 255, 255, .7);
  --bg-elev-2: rgba(255, 255, 255, .95);
  --border: rgba(15, 15, 40, .08);
  --border-strong: rgba(15, 15, 40, .16);
  --text: #12121c;
  --text-muted: #55556a;
  --text-faint: #8a8a9c;
  --nav-bg: rgba(247, 247, 251, .7);
  --blob-opacity: .35;
  --grid-color: rgba(15, 15, 40, .05);
  --shadow: 0 30px 60px -35px rgba(30, 30, 80, .35);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .4s var(--ease), color .4s var(--ease);
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; margin: 0; letter-spacing: -.02em; }
p { margin: 0; }
::selection { background: rgba(139, 92, 246, .35); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.accent { color: var(--text-faint); }
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }

/* ---------- Background ---------- */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.bg__grid {
  position: absolute; inset: -1px;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
.bg__blob {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: var(--blob-opacity);
  will-change: transform;
}
.bg__blob--1 { width: 520px; height: 520px; background: var(--violet); top: -180px; left: -120px; animation: float1 22s ease-in-out infinite; }
.bg__blob--2 { width: 460px; height: 460px; background: var(--cyan); top: -120px; right: -140px; animation: float2 26s ease-in-out infinite; opacity: calc(var(--blob-opacity) * .7); }
.bg__blob--3 { width: 380px; height: 380px; background: var(--pink); top: 420px; left: 40%; animation: float3 30s ease-in-out infinite; opacity: calc(var(--blob-opacity) * .35); }
@keyframes float1 { 50% { transform: translate(140px, 90px) scale(1.1); } }
@keyframes float2 { 50% { transform: translate(-120px, 140px) scale(.92); } }
@keyframes float3 { 50% { transform: translate(-160px, -60px) scale(1.15); } }
.bg__noise {
  position: absolute; inset: 0; 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='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  transition: background-color .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: var(--nav-bg);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.nav__brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 600; font-size: 17px; }
.nav__links { display: flex; gap: 4px; padding: 4px; border: 1px solid var(--border); border-radius: 999px; background: var(--bg-elev); }
.nav__links a {
  padding: 7px 16px; border-radius: 999px; font-size: 14px; color: var(--text-muted);
  transition: color .2s, background-color .2s;
}
.nav__links a:hover, .nav__links a.is-active { color: var(--text); background: var(--bg-elev-2); }
.nav__actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center;
  border-radius: 999px; border: 1px solid var(--border); background: var(--bg-elev);
  transition: border-color .2s, transform .3s var(--ease);
}
.icon-btn:hover { border-color: var(--border-strong); transform: rotate(-15deg); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
[data-theme="dark"] .icon-sun, [data-theme="light"] .icon-moon { display: none; }

/* ---------- Buttons ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 22px; border-radius: 999px; font-weight: 500; font-size: 15px;
  border: 1px solid transparent; white-space: nowrap;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .2s, background-color .2s;
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: transform .3s var(--ease); }
.btn:hover svg { transform: translateX(3px); }
.btn--primary { background: var(--text); color: var(--bg); box-shadow: 0 10px 30px -10px rgba(139, 92, 246, .6); }
.btn--primary:hover { box-shadow: 0 16px 40px -10px rgba(34, 211, 238, .55); }
.btn--ghost { border-color: var(--border-strong); background: var(--bg-elev); }
.btn--ghost:hover { border-color: var(--text-muted); }
.btn--sm { padding: 8px 14px; font-size: 14px; }
.btn .gh { fill: currentColor; stroke: none; width: 16px; height: 16px; }
.btn--sm:hover .gh { transform: none; }

/* ---------- Hero ---------- */
.hero { position: relative; padding-top: clamp(72px, 14vh, 140px); padding-bottom: 96px; min-height: calc(100vh - 68px); display: flex; flex-direction: column; justify-content: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; align-self: flex-start;
  padding: 6px 14px 6px 10px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-elev); font-size: 13px; color: var(--text-muted); font-family: var(--font-mono);
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 0 rgba(52, 211, 153, .6); animation: pulse 2.2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); } 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); } }
.hero__title { margin-top: 28px; font-size: clamp(40px, 7.4vw, 88px); font-weight: 600; letter-spacing: -.035em; }
.hero__title .line { display: block; }
.hero__lead { margin-top: 28px; max-width: 620px; font-size: clamp(17px, 1.6vw, 19px); color: var(--text-muted); }
.hero__lead strong { color: var(--text); font-weight: 600; }
.hero__cta { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }

.stats { margin: 64px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 620px; border-top: 1px solid var(--border); }
.stat { padding: 20px 0 0; }
.stat + .stat { padding-left: 24px; }
.stat dt { font-size: 13px; color: var(--text-faint); font-family: var(--font-mono); }
.stat dd { margin: 6px 0 0; font-family: var(--font-display); font-size: clamp(24px, 3vw, 34px); font-weight: 600; }

.scroll-hint { position: absolute; left: 24px; bottom: 28px; width: 24px; height: 40px; border: 1.5px solid var(--border-strong); border-radius: 999px; }
.scroll-hint span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: var(--text-muted); animation: scroll 1.8s var(--ease) infinite; }
@keyframes scroll { 0% { opacity: 0; transform: translateY(-4px); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(12px); } }

/* ---------- Sections ---------- */
.section { padding: 120px 24px 0; scroll-margin-top: 60px; }
.section__head { margin-bottom: 48px; max-width: 640px; }
.section__kicker { font-family: var(--font-mono); font-size: 13px; color: var(--violet); letter-spacing: .02em; }
[data-theme="dark"] .section__kicker { color: #a78bfa; }
.section h2 { margin-top: 12px; font-size: clamp(32px, 4.6vw, 52px); font-weight: 600; }
.section__sub { margin-top: 14px; color: var(--text-muted); font-size: 17px; }

/* ---------- Cards ---------- */
.card {
  position: relative; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: border-color .3s var(--ease), transform .5s var(--ease), box-shadow .5s var(--ease);
}
.spotlight::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(139, 92, 246, .14), transparent 45%);
  transition: opacity .4s var(--ease);
}
.spotlight::after {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none; opacity: 0; padding: 1px;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(34, 211, 238, .7), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  transition: opacity .4s var(--ease);
}
.spotlight:hover::before, .spotlight:hover::after { opacity: 1; }
.card:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }

/* ---------- Featured ---------- */
.featured { display: grid; gap: 20px; }
.feature { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); overflow: hidden; }
.feature:nth-child(even) { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.feature:nth-child(even) .feature__visual { order: 2; }
.feature__visual {
  position: relative; min-height: 300px; display: grid; place-items: center; overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, hsla(var(--hue), 90%, 65%, .35), transparent 55%),
    radial-gradient(circle at 80% 90%, hsla(calc(var(--hue) + 60), 90%, 60%, .25), transparent 55%),
    var(--bg-elev);
  border-right: 1px solid var(--border);
}
.feature:nth-child(even) .feature__visual { border-right: 0; border-left: 1px solid var(--border); }
.feature__orb {
  position: absolute; width: 220px; height: 220px; border-radius: 50%;
  background: conic-gradient(from 0deg, hsla(var(--hue), 90%, 65%, .0), hsla(var(--hue), 90%, 65%, .55), hsla(calc(var(--hue) + 60), 90%, 60%, .0));
  filter: blur(30px); animation: spin 12s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.feature__icon {
  position: relative; width: 110px; height: 110px;
  fill: none; stroke: hsl(var(--hue), 90%, 75%); stroke-width: 1.6; stroke-linejoin: round; stroke-linecap: round;
  filter: drop-shadow(0 10px 30px hsla(var(--hue), 90%, 60%, .5));
  transition: transform .8s var(--ease);
}
[data-theme="light"] .feature__icon { stroke: hsl(var(--hue), 70%, 45%); }
.feature:hover .feature__icon { transform: translateY(-6px) rotate(-4deg) scale(1.05); }
.feature__version {
  position: absolute; top: 18px; left: 18px; font-family: var(--font-mono); font-size: 12px;
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--bg-elev); color: var(--text-muted);
}
.feature__body { padding: clamp(28px, 4vw, 48px); display: flex; flex-direction: column; justify-content: center; }
.feature__type { font-family: var(--font-mono); font-size: 13px; color: var(--text-faint); }
.feature h3 { margin-top: 10px; font-size: clamp(26px, 3vw, 34px); font-weight: 600; }
.feature__body > p:not(.feature__type) { margin-top: 14px; color: var(--text-muted); }
.tags { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { font-size: 12.5px; font-family: var(--font-mono); padding: 4px 10px; border-radius: 8px; background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--text-muted); }
.feature__links { margin-top: 26px; display: flex; gap: 22px; flex-wrap: wrap; }
.link-arrow { position: relative; display: inline-flex; align-items: center; gap: 6px; font-weight: 500; font-size: 15px; }
.link-arrow::after { content: "↗"; transition: transform .3s var(--ease); }
.link-arrow:hover::after { transform: translate(2px, -2px); }
.link-arrow::before {
  content: ""; position: absolute; left: 0; bottom: -3px; height: 1px; width: 100%;
  background: var(--grad); transform: scaleX(0); transform-origin: right; transition: transform .4s var(--ease);
}
.link-arrow:hover::before { transform: scaleX(1); transform-origin: left; }

/* ---------- Repos ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.chip {
  padding: 7px 14px; border-radius: 999px; font-size: 14px; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--text-muted);
  transition: color .2s, border-color .2s, background-color .2s, transform .3s var(--ease);
  display: inline-flex; align-items: center; gap: 8px;
}
.chip:hover { color: var(--text); border-color: var(--border-strong); }
.chip.is-active { color: var(--bg); background: var(--text); border-color: var(--text); }
.chip .dot { width: 8px; height: 8px; }

.repos { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 16px; }
.repo { display: flex; flex-direction: column; padding: 24px; min-height: 190px; }
.repo:hover { transform: translateY(-4px); }
.repo__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.repo__icon { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: var(--bg-elev-2); border: 1px solid var(--border); }
.repo__icon svg { width: 18px; height: 18px; fill: none; stroke: var(--text-muted); stroke-width: 1.7; }
.repo__ext { color: var(--text-faint); transition: color .2s, transform .3s var(--ease); }
.repo:hover .repo__ext { color: var(--text); transform: translate(2px, -2px); }
.repo h3 { margin-top: 18px; font-size: 19px; font-weight: 600; word-break: break-word; }
.repo p { margin-top: 8px; color: var(--text-muted); font-size: 14.5px; flex: 1; }
.repo p.is-empty { color: var(--text-faint); font-style: italic; }
.repo__meta { margin-top: 18px; display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-faint); font-family: var(--font-mono); flex-wrap: wrap; }
.repo__meta span { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c, var(--text-faint)); display: inline-block; }
.repo.is-hidden { display: none; }
.repo.enter { animation: cardIn .6s var(--ease) both; animation-delay: calc(var(--i, 0) * 60ms); }
@keyframes cardIn { from { opacity: 0; transform: translateY(16px) scale(.98); } }

.skeleton { overflow: hidden; }
.skeleton::before {
  content: ""; position: absolute; inset: 0; opacity: 1;
  background: linear-gradient(100deg, transparent 30%, var(--bg-elev-2) 50%, transparent 70%);
  background-size: 200% 100%; animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer { from { background-position: 150% 0; } to { background-position: -50% 0; } }
.repos__error { grid-column: 1 / -1; padding: 32px; text-align: center; color: var(--text-muted); }
.repos__error a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Stack ---------- */
.marquee {
  overflow: hidden; border-block: 1px solid var(--border); padding: 22px 0;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee__track { display: flex; gap: 48px; width: max-content; animation: marquee 40s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track span { font-family: var(--font-display); font-size: clamp(20px, 2.4vw, 28px); font-weight: 500; color: var(--text-muted); white-space: nowrap; transition: color .2s; }
.marquee__track span:hover { color: var(--text); }
.marquee__track span::before { content: "✦"; margin-right: 48px; color: var(--violet); font-size: .6em; vertical-align: middle; }
@keyframes marquee { to { transform: translateX(-50%); } }

.pillars { margin-top: 40px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.pillar { padding: 30px; }
.pillar__num { font-family: var(--font-mono); font-size: 13px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; border: 1px solid var(--border-strong); color: var(--text-muted); }
.pillar h3 { margin-top: 22px; font-size: 21px; font-weight: 600; }
.pillar p { margin-top: 10px; color: var(--text-muted); font-size: 15px; }

/* ---------- CTA ---------- */
.cta { padding: clamp(40px, 7vw, 88px); text-align: center; overflow: hidden; }
.cta h2 { margin-top: 12px; }
.cta > p:not(.section__kicker) { margin: 16px auto 0; max-width: 520px; color: var(--text-muted); font-size: 17px; }
.cta .hero__cta { justify-content: center; }
.cta__glow {
  position: absolute; left: 50%; top: 100%; width: 700px; height: 400px; transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(139, 92, 246, .35), rgba(34, 211, 238, .15), transparent);
  filter: blur(20px); pointer-events: none; animation: breathe 6s ease-in-out infinite;
}
@keyframes breathe { 50% { transform: translate(-50%, -55%) scale(1.1); } }

/* ---------- Footer ---------- */
.footer { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 72px; padding-bottom: 40px; color: var(--text-faint); font-size: 14px; }
.footer a:hover { color: var(--text); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); filter: blur(6px); transition: opacity .9s var(--ease), transform .9s var(--ease), filter .9s var(--ease); transition-delay: calc(var(--i, 0) * 90ms); }
.reveal.is-visible { opacity: 1; transform: none; filter: none; }
.no-js .reveal { opacity: 1; transform: none; filter: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav__links { display: none; }
  .feature, .feature:nth-child(even) { grid-template-columns: 1fr; }
  .feature:nth-child(even) .feature__visual { order: 0; }
  .feature__visual, .feature:nth-child(even) .feature__visual { min-height: 200px; border: 0; border-bottom: 1px solid var(--border); }
  .pillars { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .container, .section { padding-left: 16px; padding-right: 16px; }
  .section { padding-top: 88px; }
  .nav__actions .btn span { display: none; }
  .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .stat + .stat { padding-left: 14px; }
  .stat dt { font-size: 11.5px; }
  .scroll-hint { display: none; }
  .hero { min-height: auto; padding-bottom: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; filter: none; }
}