/* Design tokens — the only place raw values live (design addendum, mandate 2).
   Slice 1's system replaces these VALUES through this same block; nothing below
   hardcodes a color or a spacing step, so none of this gets thrown away. */
:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-ink: #1a1a18;
  --color-ink-muted: #6b6a66;
  --color-line: #e3e0da;
  --color-accent: #2f5d50;
  --color-error: #9b2c2c;

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.5rem;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;

  --radius: 6px;
  --border: 1px solid var(--color-line);

  --leading: 1.5;
  --measure: 26rem;
  --weight-semibold: 600;
  --opacity-disabled: 0.6;
}

*, *::before, *::after { box-sizing: border-box; }
/* !important is load-bearing: .card{display:grid} below is same-specificity and later,
   and would otherwise un-hide a [hidden] card. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font: var(--text-base)/var(--leading) var(--font-sans);
}

.shell { max-width: var(--measure); margin: 0 auto; padding: var(--space-4) var(--space-2); display: grid; gap: var(--space-3); }
.shell__title { margin: 0; font-size: var(--text-lg); font-weight: var(--weight-semibold); }

.card {
  background: var(--color-surface);
  border: var(--border);
  border-radius: var(--radius);
  padding: var(--space-3);
  display: grid;
  gap: var(--space-2);
}
.card p { margin: 0; }

.field { display: grid; gap: var(--space-1); font-size: var(--text-sm); }
.field input {
  font: inherit;
  padding: var(--space-1);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: inherit;
}

button {
  font: inherit;
  padding: var(--space-1) var(--space-2);
  border: none;
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-surface);
  cursor: pointer;
}
button[disabled] { opacity: var(--opacity-disabled); cursor: progress; }

.note { font-size: var(--text-sm); color: var(--color-ink-muted); }
.error { margin: 0; font-size: var(--text-sm); color: var(--color-error); }