/* Design tokens — Halvorsen Orthopaedic */

:root {
  /* Light (default) — warm parchment */
  --bone: #EFEAE3;
  --paper: #F8F5EF;
  --paper-2: #E9E2D6;
  --ink: #1F2937;
  --ink-2: #2A3340;
  --ink-soft: #4A5260;
  --ink-muted: #7E848E;
  --sage: #7C8471;
  --sage-deep: #5E6657;
  --sand: #C2B79E;
  --sand-deep: #A89770;
  --oxblood: #6B2B2F;
  --oxblood-soft: #8E3A40;
  --line: rgba(31, 41, 55, 0.14);
  --line-strong: rgba(31, 41, 55, 0.32);
  --hairline: 0.5px;

  /* Type */
  --serif: "Source Serif 4", "Charter", "Georgia", "Times New Roman", serif;
  --serif-display: "Source Serif 4", "Charter", "Georgia", "Times New Roman", serif;
  --sans: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;

  /* Spacing scale (8pt) */
  --s1: 4px;
  --s2: 8px;
  --s3: 12px;
  --s4: 16px;
  --s5: 24px;
  --s6: 32px;
  --s7: 48px;
  --s8: 64px;
  --s9: 96px;
  --s10: 128px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] {
  --bone: #14181E;
  --paper: #0E1217;
  --paper-2: #1A1F26;
  --ink: #EFEAE3;
  --ink-2: #DCD5C9;
  --ink-soft: #B6B0A4;
  --ink-muted: #7E848E;
  --sage: #A0A691;
  --sage-deep: #7C8471;
  --sand: #C2B79E;
  --sand-deep: #DCC796;
  --oxblood: #C66B70;
  --oxblood-soft: #B8595E;
  --line: rgba(239, 234, 227, 0.14);
  --line-strong: rgba(239, 234, 227, 0.32);
}

* { box-sizing: border-box; }
*:focus-visible {
  outline: 2px solid var(--sage-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

.site {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
  transition: background-color 600ms var(--ease), color 600ms var(--ease);
  overflow-x: hidden;
}

.serif { font-family: var(--serif); font-weight: 400; letter-spacing: -0.015em; font-optical-sizing: auto; }
.mono  { font-family: var(--mono); font-weight: 400; letter-spacing: 0.02em; }
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 240ms var(--ease);
  text-decoration: none;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--sage-deep); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn .arrow { transition: transform 240ms var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.hairline { background: var(--line); height: 1px; width: 100%; }

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 900ms var(--ease), transform 900ms var(--ease);
  will-change: transform, opacity;
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }

/* Mask reveal for big serif */
.mask-line { display: block; overflow: hidden; }
.mask-line > span {
  display: inline-block;
  transform: translateY(0);
  transition: transform 1100ms var(--ease);
}
/* Only animate if JS adds the prep class on mount */
.js-anim .mask-line > span { transform: translateY(110%); }
.js-anim .mask-line.in > span { transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal, .mask-line > span { transition: none; transform: none; opacity: 1; }
}

/* Scrollbar — minimal */
.site ::-webkit-scrollbar { width: 8px; height: 8px; }
.site ::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 4px; }
.site ::-webkit-scrollbar-track { background: transparent; }