/* ============================================================
   Yazid Elbouachi — Agentic AI consulting one-pager
   Design system
   ============================================================ */

:root {
  /* ---- accent (tweakable) ---- */
  --accent: #fbbf24;          /* amber */
  --accent-2: #fb923c;        /* orange, gradient partner */
  --accent-rgb: 251, 191, 36;

  /* ---- dark theme base (warm near-black) ---- */
  --bg: #0a0a0c;
  --bg-elev: #100f13;
  --bg-elev-2: #16151a;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --ink: #f5f4f6;
  --ink-2: #b7b5be;
  --ink-3: #76747e;

  --grad: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 100%);
  --glow: radial-gradient(closest-side, rgba(var(--accent-rgb), 0.5), transparent);

  --maxw: 1160px;
  --pad: clamp(20px, 5vw, 64px);

  --r-sm: 8px;
  --r: 14px;
  --r-lg: 22px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

/* light theme override */
:root[data-theme="light"] {
  --bg: #f7f6f4;
  --bg-elev: #ffffff;
  --bg-elev-2: #ffffff;
  --line: rgba(10, 10, 12, 0.10);
  --line-strong: rgba(10, 10, 12, 0.16);
  --ink: #15141a;
  --ink-2: #4b4953;
  --ink-3: #8b8992;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

::selection { background: rgba(var(--accent-rgb), 0.28); color: var(--ink); }

/* ---- shared layout ---- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--accent);
  display: inline-block;
}

.section { padding-block: clamp(72px, 11vw, 140px); position: relative; }
.section-head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 64px); }
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin-top: 18px;
}
.section-head p { color: var(--ink-2); font-size: clamp(17px, 1.6vw, 19px); margin-top: 18px; max-width: 560px; }

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

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-sans);
  font-size: 15.5px; font-weight: 500;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #1a0a0e;
  font-weight: 600;
  box-shadow: 0 8px 30px -8px rgba(var(--accent-rgb), 0.5);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -10px rgba(var(--accent-rgb), 0.66); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--ink-3); background: rgba(255,255,255,0.03); }
.btn .arr { transition: transform 0.25s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }

/* reveal on scroll — progressive enhancement.
   Content is visible by default; only hidden once JS arms it (html.js-reveal),
   so a JS/observer failure can never leave the page blank. */
.reveal { transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
html.js-reveal .reveal { opacity: 0; transform: translateY(22px); }
html.js-reveal .reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.06s; }
.reveal.d2 { transition-delay: 0.12s; }
.reveal.d3 { transition-delay: 0.18s; }
.reveal.d4 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html.js-reveal .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}