/* =============================================================================
   brand.css — One Day BI Labs brand tokens + base typography.

   THIS IS THE SINGLE SOURCE OF COLOR TRUTH. Every hex value in the project lives
   here. Everywhere else (layout.css, inline HTML styles) must use var(--token).
   If you find yourself typing a "#" outside this file, stop and add a token here.

   Tokens mirror ~/.claude/skills/brand-guidelines/brands/onedaybi.md.
   ============================================================================= */

:root {
  /* ---- Primary palette ---- */
  --color-primary:        #0078d4;   /* Microsoft-aligned brand blue — links, CTAs */
  --color-primary-hover:  #106ebe;   /* darker blue for hover/active */
  --color-dark:           #111827;   /* primary text, dark surfaces */
  --color-secondary:      #1f2937;   /* secondary text/elements */
  --color-light:          #f9fafb;   /* page background, subtle surfaces */

  /* ---- Accent ---- */
  --color-accent:         #10b981;   /* success, highlights, "concept" status */
  --color-accent-bg:      rgba(16, 185, 129, 0.12);
  --color-accent-fg:      #047857;   /* readable accent text on tint */

  /* ---- Neutral ramp ---- */
  --gray-700: #374151;
  --gray-600: #4b5563;   /* body text */
  --gray-500: #6b7280;   /* muted text */
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;   /* borders / dividers */
  --gray-200: #e5e7eb;   /* light borders */
  --gray-100: #f3f4f6;   /* subtle backgrounds */
  --color-white: #ffffff;

  /* ---- Warning (used by desktop-only notes, runbook callouts) ---- */
  --warn-bg: #fef3c7;
  --warn-fg: #92400e;
  --warn-border: #f59e0b;

  /* ---- Typography ---- */
  /* Inter if locally installed, else system stack. No external font request —
     keeps S1 free of third-party scripts and GDPR-clean (no Google Fonts hit). */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* ---- Shape & depth ---- */
  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.06), 0 1px 3px rgba(17, 24, 39, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(17, 24, 39, 0.08), 0 2px 4px -2px rgba(17, 24, 39, 0.06);
  --shadow-lg: 0 10px 25px -5px rgba(17, 24, 39, 0.12), 0 8px 10px -6px rgba(17, 24, 39, 0.08);

  /* ---- Spacing scale ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;

  /* ---- Layout ---- */
  --content-max: 1100px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--color-dark);
  background: var(--color-light);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-3);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-dark);
}
h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }

p { margin: 0 0 var(--space-4); color: var(--gray-600); }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---- Brand primitives (color via tokens only) ---- */

/* "Labs" pill in the header wordmark */
.pill {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
}

/* status indicator, e.g. "Concept · gathering signal" */
.status-pill {
  display: inline-block;
  background: var(--color-accent-bg);
  color: var(--color-accent-fg);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
}

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 12px 22px;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border: 1.5px solid var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-secondary:hover { background: var(--color-accent-bg); }