/* ==========================================================================
   THEME BASE  -  structure, type, spacing, neumorphic primitives.
   Edit this file to change the *shape* of the whole site (radius, spacing,
   fonts, shadow depth). Colours live in theme-colors.css.
   ========================================================================== */
:root {
  --font-display: 'Sora', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --r-sm: 14px;
  --r-md: 22px;
  --r-lg: 32px;
  --r-xl: 44px;
  --r-pill: 999px;

  --container: 1220px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
  /* Breathing room between sections ("the pause") */
  --space-section: clamp(7.5rem, 20vh, 14rem);
  --nav-h: 84px;

  /* Neumorphic depth. Shadow colours come from theme-colors.css */
  --depth: 1;
  --neu-out: calc(10px * var(--depth)) calc(10px * var(--depth)) calc(22px * var(--depth)) var(--shadow-dark),
    calc(-10px * var(--depth)) calc(-10px * var(--depth)) calc(22px * var(--depth)) var(--shadow-light);
  --neu-out-sm: calc(5px * var(--depth)) calc(5px * var(--depth)) calc(12px * var(--depth)) var(--shadow-dark),
    calc(-5px * var(--depth)) calc(-5px * var(--depth)) calc(12px * var(--depth)) var(--shadow-light);
  --neu-in: inset calc(6px * var(--depth)) calc(6px * var(--depth)) calc(13px * var(--depth)) var(--shadow-dark),
    inset calc(-6px * var(--depth)) calc(-6px * var(--depth)) calc(13px * var(--depth)) var(--shadow-light);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.33, 1, 0.68, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: auto; }
body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.5s var(--ease-soft), color 0.5s var(--ease-soft);
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--r-sm); }

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.08; letter-spacing: -0.03em; font-weight: 700; }
h1 { font-size: clamp(2.8rem, 7vw, 5.6rem); font-weight: 800; }
h2 { font-size: clamp(2.2rem, 5vw, 3.9rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); letter-spacing: -0.02em; }
p { color: var(--text-dim); }
.accent { color: var(--accent); }

.container { width: min(100% - var(--gutter) * 2, var(--container)); margin-inline: auto; }
.section { position: relative; padding-block: var(--space-section); }

/* Section heading block */
.section-head { max-width: 46rem; margin-bottom: clamp(3rem, 7vw, 5.5rem); }
.section-head p { margin-top: 1.4rem; font-size: 1.15rem; max-width: 36rem; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.7rem;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.4rem;
}
.eyebrow::before { content: ''; width: 2rem; height: 2px; border-radius: 2px; background: currentColor; }

/* Neumorphic primitives */
.neu { background: var(--bg); box-shadow: var(--neu-out); border-radius: var(--r-md); }
.neu-sm { background: var(--bg); box-shadow: var(--neu-out-sm); border-radius: var(--r-sm); }
.neu-in { background: var(--bg); box-shadow: var(--neu-in); border-radius: var(--r-md); }
.neu-outline { border: 1px solid var(--line); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.7rem;
  padding: 0.95rem 1.7rem; border-radius: var(--r-pill); font-weight: 600; font-size: 0.98rem;
  background: var(--bg); box-shadow: var(--neu-out-sm); color: var(--text);
  transition: box-shadow 0.35s var(--ease-soft), transform 0.35s var(--ease-soft), color 0.3s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { box-shadow: var(--neu-in); transform: translateY(0); }
.btn svg { width: 1.1em; height: 1.1em; }
.btn--accent { color: var(--accent-ink); background: var(--accent); box-shadow: var(--neu-out-sm), 0 10px 30px -10px var(--accent-glow); }
.btn--accent:active { box-shadow: var(--neu-in); }
.btn .btn__dot {
  display: grid; place-items: center; width: 2rem; height: 2rem; margin: -0.35rem -0.8rem -0.35rem 0;
  border-radius: 50%; background: var(--bg); box-shadow: var(--neu-in); color: var(--accent);
}

.chip {
  display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.45rem 1rem;
  border-radius: var(--r-pill); font-size: 0.82rem; font-weight: 600; color: var(--text-dim);
  background: var(--bg); box-shadow: var(--neu-out-sm);
}
.icon-tile {
  display: grid; place-items: center; width: 3.4rem; height: 3.4rem; border-radius: var(--r-sm);
  background: var(--bg); box-shadow: var(--neu-out-sm); color: var(--accent);
}
.icon-tile svg { width: 1.5rem; height: 1.5rem; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

body { padding-bottom: 0; }
@media (max-width: 1023px) {
  :root { --nav-h: 0px; }
  body { padding-bottom: 6.5rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

/* Readability and responsive polish */
html { scroll-padding-top: 6rem; }
body { text-rendering: optimizeLegibility; }
p { max-width: 72ch; }
button, input, textarea { -webkit-tap-highlight-color: transparent; }
@media (max-width: 640px) {
  :root { --gutter: 1.15rem; --space-section: clamp(5.5rem, 14vh, 8rem); }
  body { font-size: 1rem; }
  .section-head { margin-bottom: 2.8rem; }
  .section-head p { font-size: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  .strip__track { animation: none !important; }
}