/* ============================================================
   theme.css — design tokens, reset, shared primitives
   Architecture-inspired system: geometric grid, blueprint lines
   ============================================================ */

:root {
  /* Palette — concrete, ink, blueprint */
  --ink:        #14161a;
  --ink-soft:   #2b2f36;
  --paper:      #f4f2ec;
  --paper-2:    #e9e6dd;
  --line:       #c9c4b6;
  --accent:     #c8551f;   /* terracotta / structural steel-orange */
  --accent-2:   #1f5c6b;   /* blueprint teal */
  --white:      #ffffff;

  /* Type */
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  /* Rhythm */
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --maxw: 1240px;
  --radius: 2px;

  /* Motion */
  --ease: cubic-bezier(.16,.84,.44,1);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

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

img { max-width: 100%; display: block; }

/* Layout helpers */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
  transition: transform .3s var(--ease), background .3s var(--ease), color .3s var(--ease);
}
.btn:hover { transform: translateY(-2px); background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }

/* Hairline geometric divider */
.rule { height: 1px; background: var(--line); border: 0; margin: 0; }

/* Reveal on scroll */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}