/* Apple design system tokens — bound verbatim from the active design system. */

:root {
  /* Surface (3 levels) */
  --bg: #ffffff;
  --surface: #f5f5f7;
  --surface-warm: #fbfbfd;

  /* Foreground ramp (4 levels) */
  --fg: #1d1d1f;
  --fg-2: #424245;
  --muted: #6e6e73;
  --meta: #86868b;

  /* Border (2 levels) */
  --border: #d2d2d7;
  --border-soft: #e8e8ed;

  /* Accent */
  --accent: #0071e3;
  --accent-on: #ffffff;
  --accent-hover: #0077ed;
  --accent-active: #0066cc;

  /* Semantic */
  --success: #16a34a;
  --warn:    #eab308;
  --danger:  #dc2626;

  /* Typography */
  --font-display:
    "SF Pro Display", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body:
    "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono:
    "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Monaco, Consolas, monospace;

  --text-xs:   12px;
  --text-sm:   14px;
  --text-base: 17px;
  --text-lg:   21px;
  --text-xl:   28px;
  --text-2xl:  40px;
  --text-3xl:  56px;
  --text-4xl:  80px;

  --leading-body:  1.47;
  --leading-tight: 1.05;
  --tracking-display: -0.015em;

  /* Spacing */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-12: 48px;

  /* Section rhythm */
  --section-y-desktop: 100px;
  --section-y-tablet:  64px;
  --section-y-phone:   40px;

  /* Radius */
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-pill: 980px;

  /* Elevation */
  --elev-flat:   none;
  --elev-ring:   0 0 0 1px var(--border);
  --elev-raised: 0 12px 32px rgba(0, 0, 0, 0.08);

  /* Focus ring */
  --focus-ring: 0 0 0 4px color-mix(in oklab, var(--accent), transparent 65%);

  /* Motion */
  --motion-fast:   150ms;
  --motion-base:   220ms;
  --ease-standard: cubic-bezier(0.28, 0, 0.22, 1);

  /* Layout */
  --container-max:            1024px;
  --container-gutter-desktop: 22px;
  --container-gutter-tablet:  18px;
  --container-gutter-phone:   16px;
}

/* Resets + base */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "calt";
}

body { min-height: 100vh; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-standard);
}
a:hover { color: var(--accent-hover); }
a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 4px; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: var(--tracking-display);
  line-height: var(--leading-tight);
  font-weight: 600;
  color: var(--fg);
  margin: 0;
}

p { margin: 0; }

button { font-family: inherit; }

/* Utility */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter-desktop);
}
@media (max-width: 1023px) {
  .container { padding-inline: var(--container-gutter-tablet); }
}
@media (max-width: 640px) {
  .container { padding-inline: var(--container-gutter-phone); }
}

.tab-num { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }

/* Pill button */
.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  padding-inline: 18px;
  background: var(--accent);
  color: var(--accent-on);
  border: 0;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard);
}
.btn-pill:hover { background: var(--accent-hover); }
.btn-pill:active { background: var(--accent-active); transform: scale(0.97); }
.btn-pill:focus-visible { outline: none; box-shadow: var(--focus-ring); }

.btn-pill-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  padding-inline: 18px;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard);
}
.btn-pill-secondary:hover { background: var(--surface); border-color: var(--meta); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--motion-base) var(--ease-standard), transform var(--motion-base) var(--ease-standard);
}
.card:hover { box-shadow: var(--elev-raised); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 500;
}
.badge-accent { background: color-mix(in oklab, var(--accent), white 88%); color: var(--accent-active); }
.badge-success { background: color-mix(in oklab, var(--success), white 86%); color: #15803d; }
.badge-dot::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}