/* Shared foundation: reset, typography, buttons, chips, focus, utilities. */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-body);
  font-feature-settings: "ss01", "tnum" 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
:where(h1, h2, h3) { text-wrap: balance; }
p { text-wrap: pretty; }

.display { font-family: var(--font-display); font-weight: 400; letter-spacing: var(--tracking-display); line-height: var(--leading-tight); }
.caps { text-transform: uppercase; letter-spacing: var(--tracking-caps); font-size: var(--text-2xs); font-weight: 600; }
.mono { font-family: var(--font-mono); font-size: 0.92em; }
.num { font-variant-numeric: tabular-nums; }
.muted { color: var(--ink-2); }
.faint { color: var(--ink-3); }

/* ---- Focus: always visible for keyboard users ---- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

.skip-link {
  position: absolute; left: var(--space-md); top: -100px; z-index: 100;
  background: var(--ink); color: var(--ink-inverse);
  padding: var(--space-xs) var(--space-md); border-radius: var(--radius-sm);
}
.skip-link:focus { top: var(--space-md); }

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

/* ---- Icons ---- */
.icon { width: 16px; height: 16px; flex: none; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon-sm { width: 14px; height: 14px; }
.icon-lg { width: 20px; height: 20px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs);
  min-height: 36px; padding: 0 var(--space-md);
  border: 1px solid transparent; border-radius: var(--radius-sm);
  font-size: var(--text-sm); font-weight: 500; line-height: 1; white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--ink); color: var(--ink-inverse); }
.btn-primary:hover:not(:disabled) { background: color-mix(in oklch, var(--ink) 86%, var(--paper)); }
.btn-accent { background: var(--accent); color: var(--on-accent); }
.btn-accent:hover:not(:disabled) { background: var(--accent-hover); }
.btn-secondary { background: var(--surface); border-color: var(--line-strong); color: var(--ink); }
.btn-secondary:hover:not(:disabled) { background: var(--surface-2); }
.btn-ghost { color: var(--ink-2); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); color: var(--ink); }
.btn-danger { background: var(--surface); border-color: var(--line-strong); color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: var(--danger-soft); }
.btn-lg { min-height: 48px; padding: 0 var(--space-lg); font-size: var(--text-md); }
.btn-sm { min-height: 30px; padding: 0 var(--space-sm); font-size: var(--text-xs); }
.btn-icon { width: 36px; padding: 0; }
.btn-icon.btn-sm { width: 30px; }

/* ---- Chips & status ---- */
.chip {
  display: inline-flex; align-items: center; gap: var(--space-2xs);
  padding: 2px var(--space-xs); border-radius: var(--radius-xs);
  background: var(--surface-2); color: var(--ink-2);
  font-size: var(--text-xs); line-height: 1.5; white-space: nowrap;
}
.status {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--text-xs); font-weight: 500; white-space: nowrap; line-height: 1.5;
  padding: 1px var(--space-xs) 1px 6px; border-radius: var(--radius-pill);
}
.status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: none; }
.status-validated { color: var(--ok); background: var(--ok-soft); }
.status-review { color: var(--warn); background: var(--warn-soft); }
.status-draft { color: var(--ink-2); background: var(--surface-2); }
.status-outdated { color: var(--danger); background: var(--danger-soft); }
.status-synced { color: var(--ok); background: var(--ok-soft); }
.status-syncing { color: var(--accent-ink); background: var(--accent-soft); }
.status-error { color: var(--danger); background: var(--danger-soft); }
.status-paused { color: var(--ink-2); background: var(--surface-2); }
.status-syncing::before { animation: pulse 1.2s var(--ease-in-out) infinite; }
@keyframes pulse { 50% { opacity: 0.25; } }

/* ---- Avatars (initials, hue from person) ---- */
.avatar {
  --h: 262;
  display: inline-grid; place-items: center; flex: none;
  width: 28px; height: 28px; border-radius: 50%;
  background: oklch(var(--av-bg-l) 0.05 var(--h)); color: oklch(var(--av-fg-l) 0.08 var(--h));
  font-size: 11px; font-weight: 600; letter-spacing: 0.02em;
}
.avatar-sm { width: 22px; height: 22px; font-size: 9.5px; }
.avatar-lg { width: 44px; height: 44px; font-size: 15px; }
.avatar-stack { display: inline-flex; }
.avatar-stack .avatar { box-shadow: 0 0 0 2px var(--surface); }
.avatar-stack .avatar + .avatar { margin-left: -6px; }

/* ---- Brand mark ---- */
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-mark { width: 22px; height: 22px; }

/* ---- Grain gradient backdrop (blue/mint, noise overlay) ---- */
.grain {
  position: relative; isolation: isolate; overflow: hidden;
  background-color: var(--grain-blue);
  background-image:
    radial-gradient(28% 70% at 14% 38%, var(--grain-mint) 0%, transparent 70%),
    radial-gradient(22% 90% at 46% 12%, color-mix(in oklch, var(--grain-mint) 70%, var(--grain-sky)) 0%, transparent 72%),
    radial-gradient(30% 60% at 84% 82%, var(--grain-mint) 0%, transparent 70%),
    radial-gradient(40% 80% at 70% 30%, var(--grain-sky) 0%, transparent 70%),
    linear-gradient(112deg, var(--grain-blue-deep) 0%, var(--grain-blue) 22%, var(--grain-sky) 38%, var(--grain-blue) 52%, var(--grain-blue-deep) 66%, var(--grain-blue) 84%, var(--grain-sky) 100%);
}
.grain::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='1.1' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 1.6 -0.45'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>"),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='m'><feTurbulence type='fractalNoise' baseFrequency='1.4' numOctaves='1' seed='7' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.1  0 0 0 0 0.15  0 0 0 0 0.35  0 0 0 1.5 -0.55'/></filter><rect width='100%' height='100%' filter='url(%23m)'/></svg>");
  opacity: 0.55;
}
.grain > * { position: relative; z-index: 1; }

/* Touch devices: 44px minimum targets (WCAG 2.5.5 / Apple HIG). */
@media (pointer: coarse) {
  .btn { min-height: 44px; }
  .btn-icon { width: 44px; }
  .btn-sm { min-height: 40px; }
  .btn-icon.btn-sm { width: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}