/* ==========================================================================
   Francesco Pio De Dominicis — Portfolio
   Design system E · "Pro Glass": monochrome canvas, gradient headlines,
   Liquid Glass on foreground containers only. Theme follows the OS.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  color-scheme: light dark;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --gradient: linear-gradient(90deg, #ff9f43 0%, #ff4f81 50%, #a259ff 100%);

  --radius: 28px;
  --radius-inner: 12px;
  --radius-cta: 40px;
  --content: 1120px;
  --gutter: 20px;

  /* Light */
  --bg: #f5f5f7;
  --label: #1d1d1f;
  --label-2: #6e6e73;
  --label-3: #86868b;
  --separator: rgba(0, 0, 0, 0.08);
  --accent: #0071e3;
  --on-accent: #ffffff;
  --link: #0066cc;
  --tag: rgba(0, 0, 0, 0.05);
  --ok: #248a3d;
  --bad: #d70015;

  --glass: rgba(255, 255, 255, 0.55);
  --glass-thin: rgba(255, 255, 255, 0.45);
  --glass-thick: rgba(255, 255, 255, 0.7);
  --glass-rim: linear-gradient(135deg, rgba(255,255,255,1) 0%, rgba(255,255,255,.55) 33%, rgba(255,255,255,.3) 66%, rgba(255,255,255,.95) 100%);
  --glass-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  --viz: rgba(255, 255, 255, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --label: #f5f5f7;
    --label-2: #a1a1a6;
    --label-3: #6e6e73;
    --separator: rgba(255, 255, 255, 0.1);
    --accent: #2997ff;
    --on-accent: #ffffff;
    --link: #2997ff;
    --tag: rgba(255, 255, 255, 0.08);
    --ok: #30d158;
    --bad: #ff453a;

    --glass: rgba(255, 255, 255, 0.07);
    --glass-thin: rgba(255, 255, 255, 0.06);
    --glass-thick: rgba(255, 255, 255, 0.1);
    --glass-rim: linear-gradient(135deg, rgba(255,255,255,.5) 0%, rgba(255,255,255,.1) 33%, rgba(255,255,255,.04) 66%, rgba(255,255,255,.28) 100%);
    --glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.14);
    --viz: rgba(0, 0, 0, 0.35);
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 96px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--label);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul, ol, figure { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  padding: 8px 14px; border-radius: 980px;
  background: var(--accent); color: var(--on-accent); font-size: 14px;
}
.skip-link:focus { top: 16px; }

.container { width: min(var(--content), 100% - 2 * var(--gutter)); margin-inline: auto; }

.mono { font-family: var(--font-mono); }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- Liquid Glass ---------- */
.glass {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
  border-radius: var(--radius);
  box-shadow: var(--glass-highlight), var(--glass-shadow);
  isolation: isolate;
}
/* specular rim: a 1px gradient border drawn with a mask */
.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: var(--glass-rim);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}
.glass--thin { background: var(--glass-thin); -webkit-backdrop-filter: blur(20px) saturate(180%); backdrop-filter: blur(20px) saturate(180%); }
.glass--thick { background: var(--glass-thick); -webkit-backdrop-filter: blur(60px) saturate(180%); backdrop-filter: blur(60px) saturate(180%); }

/* ---------- Buttons, links, tags ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 11px 22px;
  border-radius: 980px;
  font-size: 15px; font-weight: 500; line-height: 1.2;
  white-space: nowrap;
  transition: transform .2s ease-out, background-color .2s ease-out, opacity .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: .85; }
.btn--primary { background: var(--accent); color: var(--on-accent); box-shadow: inset 0 1px 0 rgba(255,255,255,.25); }
.btn--glass { color: var(--label); border-radius: 980px; }
.btn--small { padding: 8px 16px; font-size: 13px; }

.link { color: var(--link); font-size: 15px; font-weight: 500; }
.link:hover { text-decoration: underline; text-underline-offset: 3px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  padding: 5px 11px;
  border-radius: 980px;
  background: var(--tag);
  color: var(--label-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.3;
}

/* ---------- Nav (floating glass capsule) ---------- */
.nav-wrap { position: sticky; top: 16px; z-index: 50; margin-top: 20px; }
.nav {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 8px 8px 8px 24px;
  border-radius: 980px;
}
.nav__brand { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.nav__links { display: flex; gap: 32px; font-size: 13px; color: var(--label-2); }
.nav__links a:hover { color: var(--label); }
.nav__actions { display: flex; align-items: center; gap: 12px; }

.lang { display: flex; padding: 2px; border-radius: 980px; background: var(--tag); font-family: var(--font-mono); font-size: 11px; }
.lang a { padding: 3px 9px; border-radius: 980px; color: var(--label-3); }
.lang a[aria-current="true"] { background: var(--glass-thick); color: var(--label); font-weight: 500; box-shadow: 0 1px 3px rgba(0,0,0,.1); }

/* ---------- Sections ---------- */
.section { padding-top: 120px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; }
.section-head .eyebrow { margin-bottom: 12px; }
.headline { font-size: clamp(36px, 5vw, 52px); font-weight: 600; letter-spacing: -0.025em; line-height: 1.08; }
.headline--sm { font-size: 36px; }

/* ---------- Hero ---------- */
.hero { padding-top: 120px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 28px; }
.status {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 980px;
  font-size: 13px; font-weight: 500;
}
.status__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.hero__name { font-size: clamp(26px, 3.4vw, 40px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; }
.hero__title { font-size: clamp(32px, 12vw, 104px); font-weight: 700; letter-spacing: -0.045em; line-height: 0.96; padding-bottom: 0.06em; }
.hero__lead { max-width: 760px; font-size: clamp(18px, 2.2vw, 22px); line-height: 1.45; color: var(--label-2); }
.hero__cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; margin-top: 40px; padding: 28px 0; }
.stat { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 8px 16px; }
.stat + .stat { border-left: 1px solid var(--separator); }
.stat__value { font-size: clamp(28px, 3.4vw, 40px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.1; }
.stat__label { font-size: 14px; color: var(--label-2); }

/* ---------- Featured (GroundOne) ---------- */
.featured { display: grid; grid-template-columns: 1fr 500px; gap: 56px; align-items: center; padding: 56px; }
.featured__body { display: flex; flex-direction: column; gap: 18px; }
.featured__title { font-size: 36px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.12; }
.featured__text { color: var(--label-2); line-height: 1.5; }

.viz {
  display: flex; flex-direction: column; gap: 10px;
  padding: 22px; border-radius: 20px;
  background: var(--viz); border: 1px solid var(--separator);
}
.viz__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; font-family: var(--font-mono); font-size: 12px; color: var(--label-3); }
.viz__head span:last-child { color: var(--label-2); }
.claim {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 14px; border-radius: var(--radius-inner);
  font-size: 14px;
  background: color-mix(in srgb, var(--c) 12%, transparent);
}
.claim--ok { --c: var(--ok); }
.claim--bad { --c: var(--bad); }
.claim__badge {
  flex-shrink: 0;
  padding: 4px 10px; border-radius: 980px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--c); background: color-mix(in srgb, var(--c) 20%, transparent);
}
.viz__note { font-family: var(--font-mono); font-size: 11px; color: var(--label-3); }

/* ---------- Project grid ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  display: flex; flex-direction: column; gap: 12px;
  padding: 30px;
  transition: transform .2s ease-out;
}
.card:hover { transform: translateY(-4px); }
.card__top { display: flex; justify-content: space-between; align-items: center; }
.card__kicker { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--label-3); }
.card__arrow { color: var(--label-3); transition: color .2s, transform .2s; }
.card:hover .card__arrow { color: var(--link); transform: translate(2px, -2px); }
.card__title { font-size: 24px; font-weight: 600; letter-spacing: -0.015em; line-height: 1.2; }
.card__text { flex: 1; font-size: 15px; line-height: 1.45; color: var(--label-2); margin-bottom: 12px; }

/* ---------- Toolkit ---------- */
.toolkit .tags { gap: 8px; }
.stack { margin: 0; padding: 8px 36px; }
.stack__row { display: grid; grid-template-columns: 200px 1fr; gap: 40px; align-items: start; padding: 22px 0; }
.stack__row + .stack__row { border-top: 1px solid var(--separator); }
.stack__label { padding-top: 3px; font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.stack dd { margin: 0; }

/* ---------- Timeline (experience / education) ---------- */
.timeline { padding: 8px 36px; }
.timeline + .subhead { margin-top: 32px; }
.subhead { font-size: 28px; font-weight: 600; letter-spacing: -0.015em; margin-bottom: 32px; }
.entry { display: grid; grid-template-columns: 200px 1fr; gap: 40px; padding: 26px 0; }
.entry + .entry { border-top: 1px solid var(--separator); }
.entry__period { font-family: var(--font-mono); font-size: 13px; color: var(--label-3); padding-top: 4px; }
.entry__role { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 21px; font-weight: 600; letter-spacing: -0.01em; }
.entry__org { font-size: 17px; color: var(--label-2); margin-top: 6px; }
.entry__text { font-size: 15px; line-height: 1.5; color: var(--label-3); margin-top: 6px; }
.entry__text a { color: var(--link); }
.now {
  padding: 3px 9px; border-radius: 980px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent);
}

/* ---------- Contact ---------- */
.cta { display: flex; flex-direction: column; align-items: center; gap: 28px; padding: 80px 40px; text-align: center; border-radius: var(--radius-cta); }
.cta__title { font-size: clamp(44px, 6.5vw, 72px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.04; padding-bottom: 0.06em; }
.cta__lead { font-size: 19px; color: var(--label-2); }
.cta__actions { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 12px; }

/* ---------- Footer ---------- */
.footer { margin-top: 100px; border-top: 1px solid var(--separator); }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding: 28px 0 40px; font-family: var(--font-mono); font-size: 12px; color: var(--label-3); }
.footer a:hover { color: var(--label); }

/* ---------- Responsive ---------- */
@media (max-width: 1060px) {
  .featured { grid-template-columns: 1fr; padding: 40px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .nav__links { gap: 20px; }
}

@media (max-width: 760px) {
  .nav { padding-left: 18px; }
  .nav__links { display: none; }
  .nav .long { display: none; }
  .nav__brand { white-space: nowrap; }
  .hero { padding-top: 72px; gap: 22px; }
  .stats { grid-template-columns: 1fr; padding: 8px 0; }
  .stat { padding: 18px 16px; }
  .stat + .stat { border-left: 0; border-top: 1px solid var(--separator); }
  .section { padding-top: 88px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .featured { padding: 28px 22px; gap: 32px; }
  .featured__title { font-size: 28px; }
  .grid { grid-template-columns: 1fr; }
  .card { padding: 26px; }
  .timeline { padding: 4px 22px; }
  .stack { padding: 4px 22px; }
  .stack__row { grid-template-columns: 1fr; gap: 10px; padding: 18px 0; }
  .entry { grid-template-columns: 1fr; gap: 6px; }
  .cta { padding: 56px 22px; }
  .claim { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 761px) {
  .nav .short { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* Fallback for browsers without backdrop-filter: slightly more opaque glass */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  :root { --glass: rgba(255, 255, 255, 0.85); }
  @media (prefers-color-scheme: dark) { :root { --glass: rgba(28, 28, 30, 0.92); } }
}