/* ─────────────────────────────────────────────────────────
   Arthur Tressol — arthurtressol.me
   ───────────────────────────────────────────────────────── */

:root {
  --bg:        #0b0b0d;
  --bg-soft:   #101013;
  --surface:   #131316;
  --line:      rgba(255, 255, 255, 0.09);
  --line-soft: rgba(255, 255, 255, 0.05);

  --fg:        #f4f4f5;
  --fg-muted:  #a2a2ab;
  --fg-faint:  #6e6e78;

  --accent:      #ff9146;
  --accent-soft: rgba(255, 145, 70, 0.14);

  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --page:    1080px;
  --gutter:  clamp(1.25rem, 5vw, 4rem);
  --section: clamp(5rem, 12vw, 9rem);

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.025em; line-height: 1.12; }
p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }

::selection { background: var(--accent); color: #16100a; }

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #16100a;
  font-weight: 600;
}
.skip:focus { left: 0; }

/* ── Nav ───────────────────────────────────────────────── */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.9rem var(--gutter);
  background: rgba(11, 11, 13, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease);
}
.nav.scrolled { border-bottom-color: var(--line); }

.nav-mark {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-mark:hover { border-color: var(--accent); color: var(--accent); }

.nav-links {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
  font-size: 0.875rem;
  color: var(--fg-muted);
}
.nav-links a {
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.nav-links a:hover { color: var(--fg); }

.lang {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fg-faint);
}
.lang button {
  padding: 0.15rem 0.15rem;
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  color: var(--fg-faint);
  font: inherit;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.lang button:hover { color: var(--fg); }
.lang button[aria-pressed="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── Layout primitives ─────────────────────────────────── */

main { display: block; }

.section {
  max-width: var(--page);
  margin: 0 auto;
  padding: var(--section) var(--gutter);
  border-top: 1px solid var(--line-soft);
}

.label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 2.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.label .num { color: var(--accent); }

.h2 {
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  max-width: 12ch;
}
.h2-wide { max-width: 20ch; margin-bottom: 1.5rem; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.prose { color: var(--fg-muted); max-width: 60ch; }
.prose-wide { max-width: 52ch; font-size: 1.05rem; }

.link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-soft);
  transition: border-color 0.2s var(--ease);
}
.link:hover { border-bottom-color: var(--accent); }

.muted { color: var(--fg-faint); font-weight: 400; }

/* ── Hero ──────────────────────────────────────────────── */

.hero {
  position: relative;
  max-width: var(--page);
  margin: 0 auto;
  padding: clamp(8rem, 22vh, 13rem) var(--gutter) clamp(5rem, 14vh, 8rem);
}

.hero-glow {
  position: absolute;
  top: -14rem;
  left: -12rem;
  width: min(48rem, 110vw);
  height: min(48rem, 110vw);
  background: radial-gradient(circle, rgba(255, 145, 70, 0.13), transparent 62%);
  pointer-events: none;
  z-index: -1;
}

.eyebrow {
  margin: 0 0 1.75rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 0.7rem;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
}

.hero-name {
  font-size: clamp(2.9rem, 9.5vw, 6.25rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  margin-bottom: 1.25rem;
}

.hero-role {
  margin: 0 0 2rem;
  font-size: clamp(1.05rem, 2.4vw, 1.4rem);
  color: var(--fg);
  font-weight: 500;
}
.hero-role strong { color: var(--accent); font-weight: 600; }
.hero-role .dot { color: var(--fg-faint); margin: 0 0.5rem; }

.hero-lead {
  max-width: 48ch;
  margin-bottom: 2.75rem;
  font-size: clamp(1rem, 1.7vw, 1.15rem);
  color: var(--fg-muted);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; }

.btn {
  display: inline-block;
  padding: 0.72rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.925rem;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease),
              transform 0.2s var(--ease);
}
.btn:hover { border-color: var(--fg-faint); transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #16100a;
  font-weight: 600;
}
.btn-primary:hover { background: #ffa564; border-color: #ffa564; }

/* ── Toolbox ───────────────────────────────────────────── */

.tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 3.5rem;
}
.tools li {
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
}

/* ── Cards ─────────────────────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 3.5rem;
}
.card {
  padding: 1.6rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.card:hover { border-color: rgba(255, 145, 70, 0.4); transform: translateY(-3px); }
.card h3 { font-size: 1.02rem; margin-bottom: 0.6rem; }
.card p { font-size: 0.925rem; color: var(--fg-muted); }

/* ── Products ──────────────────────────────────────────── */

.products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0;
  margin-top: 3.5rem;
  border-top: 1px solid var(--line);
}
.product {
  display: flex;
  flex-direction: column;
  padding: 1.75rem 1.5rem 1.75rem 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s var(--ease);
}
.product:hover { background: var(--bg-soft); }
.product h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}
.product p { font-size: 0.925rem; color: var(--fg-muted); margin-bottom: 0.9rem; }
.product-link {
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.product-link:hover { color: var(--accent); }
.tag {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--fg-faint);
}

/* ── Timeline ──────────────────────────────────────────── */

.timeline {
  margin-top: 3rem;
  border-left: 1px solid var(--line);
}
.entry {
  position: relative;
  padding: 0 0 2.75rem 2rem;
}
.entry:last-child { padding-bottom: 0; }
.entry::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.6rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fg-faint);
}
.entry:first-child::before { background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

.entry-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.3rem;
}
.entry-head h3 { font-size: 1.2rem; }
.entry-role { color: var(--fg); font-size: 0.95rem; margin-bottom: 0.5rem; }
.entry p:last-child { color: var(--fg-muted); font-size: 0.95rem; max-width: 62ch; }

.badge {
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.badge-quiet {
  background: none;
  border: 1px solid var(--line);
  color: var(--fg-faint);
}

/* ── Contact ───────────────────────────────────────────── */

.section-contact { border-bottom: 1px solid var(--line-soft); }

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.5rem;
}
.contact-links a {
  display: inline-block;
  padding: 0.7rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.925rem;
  text-decoration: none;
  color: var(--fg-muted);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
              transform 0.2s var(--ease);
}
.contact-links a:hover {
  color: var(--accent);
  border-color: rgba(255, 145, 70, 0.45);
  transform: translateY(-2px);
}

/* ── Footer ────────────────────────────────────────────── */

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  max-width: var(--page);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 3rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--fg-faint);
}
.footer p { margin: 0; }

/* ── Reveal on scroll ──────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 760px) {
  .nav-links { display: none; }
  .lang { margin-left: auto; }
  .split { grid-template-columns: 1fr; gap: 1.5rem; }
  .h2 { max-width: 18ch; }
  .product { padding-right: 0; }
}

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