@import 'tailwindcss';

/* ═══════════════════════════════════════════════
   DESIGN SYSTEM — Single source of truth

   RULES:
   1. No raw px in component <style> blocks — use tokens
   2. No raw rgba/hex colors — use semantic tokens
   3. No copy-pasting base component styles — use globals
   4. Surface hierarchy: canvas → surface → card
   5. Text hierarchy: text-1 → text-2 → text-3 → text-4
   ═══════════════════════════════════════════════ */

@layer base {
  :root {
    /* ── Fonts ── */
    --font: 'Inter', -apple-system, system-ui, sans-serif;
    --mono: 'JetBrains Mono', ui-monospace, monospace;
    --transition: 180ms ease;

    /* ── Spacing scale (4px grid) ──
     * Use these everywhere: padding, margin, gap.
     * Naming: --sp-{n} where value = n × 4px
     */
    --sp-0: 0px;
    --sp-px: 1px;
    --sp-0.5: 2px;
    --sp-1: 4px;
    --sp-1.5: 6px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-7: 28px;
    --sp-8: 32px;
    --sp-10: 40px;
    --sp-12: 48px;
    --sp-16: 64px;
    --sp-20: 80px;

    /* Semantic spacing aliases */
    --section-gap: var(--sp-7);
    --card-pad: var(--sp-5);
    --card-pad-primary: var(--sp-7);
    --card-pad-secondary: var(--sp-4);
    --row-gap: var(--sp-3);
    --module-gap: var(--sp-5);
    --row-pad-y: 14px;
    --row-pad-x: var(--sp-4);
    --inner-gap: var(--sp-3);

    /* ── Radius scale ── */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* ── Elevation scale ──
     * xs: barely visible (row hover, inner elements)
     * sm: subtle lift (secondary cards, inputs)
     * md: standard card elevation
     * lg: elevated (dropdowns, popovers, hero cards)
     * xl: overlay (modals, slide-out panels)
     */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.03);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-md: 0 2px 6px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.06), 0 16px 40px rgba(0,0,0,0.1);
    --shadow-xl: 0 8px 24px rgba(0,0,0,0.08), 0 24px 60px rgba(0,0,0,0.15);
    /* Legacy aliases */
    --card-shadow: var(--shadow-md);
    --card-shadow-sm: var(--shadow-sm);

    /* ── Typography scale ──
     * xs:   badges, pills, tiny counters
     * sm:   labels, meta, captions, button text
     * base: body text, list items, inputs
     * md:   card titles, important rows (16px avoids iOS zoom)
     * lg:   section headers, modal titles
     * xl:   page titles
     * 2xl:  hero headings
     * 3xl:  large hero numbers
     */
    --text-xs: 11px;
    --text-sm: 13px;
    --text-base: 14px;
    --text-md: 15px;
    --text-lg: 17px;
    --text-xl: 22px;
    --text-2xl: 28px;
    --text-3xl: 36px;

    /* Line heights */
    --leading-tight: 1.2;
    --leading-snug: 1.35;
    --leading-normal: 1.5;
    --leading-relaxed: 1.65;
    --leading-loose: 1.8;
  }

  /* ── LIGHT MODE ── */
  :root {
    /* Surface hierarchy: canvas (page bg) → surface (sidebars, panels) → card (content containers) */
    --canvas: #F5F6F8;
    --surface: #FFFFFF;
    --surface-secondary: #FAFAFB;
    --card: #FFFFFF;
    --card-secondary: #FAFAFB;
    --card-hover: #f0f0f3;

    /* Borders */
    --border: rgba(0,0,0,0.06);
    --border-strong: rgba(0,0,0,0.1);

    /* Text hierarchy: 1 (headings/names) → 2 (body) → 3 (labels/meta) → 4 (placeholder/disabled) */
    --text-1: #1a1a1f;
    --text-2: #4a4a55;
    --text-3: #6b6b76;
    --text-4: #b4b4bd;

    /* Accent — indigo */
    --accent: #4F46E5;
    --accent-bg: #EEF2FF;
    --accent-dim: rgba(79,70,229,0.06);
    --accent-border: rgba(79,70,229,0.10);
    --accent-focus: rgba(79,70,229,0.12);

    /* Semantic: success */
    --success: #16A34A;
    --success-bg: #F0FDF4;
    --success-dim: rgba(34,197,94,0.08);

    /* Semantic: error */
    --error: #DC2626;
    --error-bg: #FEF2F2;
    --error-dim: rgba(239,68,68,0.08);

    /* Semantic: warning */
    --warning: #d97706;
    --warning-bg: rgba(245,158,11,0.08);

    /* Overlay */
    --overlay: rgba(0,0,0,0.3);
    --overlay-strong: rgba(0,0,0,0.5);
    --nav-bg: rgba(255,255,255,0.9);
  }

  /* ── DARK MODE ── */
  .dark {
    --canvas: #09090b;
    --surface: #0f0f12;
    --surface-secondary: #111114;
    --card: #161619;
    --card-secondary: #111114;
    --card-hover: #1c1c20;

    --border: rgba(255,255,255,0.06);
    --border-strong: rgba(255,255,255,0.1);

    --text-1: #fafafa;
    --text-2: #a1a1aa;
    --text-3: #71717a;
    --text-4: #3f3f46;

    --accent: #3b82f6;
    --accent-bg: rgba(59,130,246,0.1);
    --accent-dim: rgba(59,130,246,0.08);
    --accent-border: rgba(59,130,246,0.12);
    --accent-focus: rgba(59,130,246,0.15);

    --success: #22c55e;
    --success-bg: rgba(34,197,94,0.1);
    --success-dim: rgba(34,197,94,0.08);

    --error: #ef4444;
    --error-bg: rgba(239,68,68,0.1);
    --error-dim: rgba(239,68,68,0.08);

    --warning: #f59e0b;
    --warning-bg: rgba(245,158,11,0.1);

    --overlay: rgba(0,0,0,0.6);
    --overlay-strong: rgba(0,0,0,0.75);
    --nav-bg: rgba(15,15,18,0.9);

    /* Dark shadows need higher opacity */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.15), 0 4px 12px rgba(0,0,0,0.1);
    --shadow-md: 0 2px 6px rgba(0,0,0,0.15), 0 8px 24px rgba(0,0,0,0.12);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.2), 0 16px 40px rgba(0,0,0,0.2);
    --shadow-xl: 0 8px 24px rgba(0,0,0,0.25), 0 24px 60px rgba(0,0,0,0.3);
  }

  /* ── Base resets ── */
  html, body {
    font-family: var(--font);
    background: var(--canvas);
    color: var(--text-1);
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
  }

  * { border-color: var(--border); }
  a { color: inherit; text-decoration: none; }
  button { font-family: var(--font); cursor: pointer; }
  input { font-family: var(--font); }
}

/* ═══════════════════════════════════════════════
   GLOBAL COMPONENT CLASSES
   Use these in any component without re-declaring
   ═══════════════════════════════════════════════ */

/* ── Skeleton loader ── */
.skeleton {
  background: linear-gradient(90deg, var(--card) 25%, var(--card-hover) 50%, var(--card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-xs);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Buttons ── */
.btn-primary {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-md);
  background: var(--accent);
  color: white;
  border: none;
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary.full {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--text-md);
  font-weight: 600;
  border-radius: var(--radius);
}

.btn-secondary {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-md);
  background: var(--card-secondary);
  color: var(--text-2);
  border: 1px solid var(--border);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-secondary:hover { background: var(--card-hover); color: var(--text-1); }

.btn-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--card-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-3);
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-icon:hover { color: var(--text-1); background: var(--card-hover); }
.btn-icon svg { width: var(--sp-4); height: var(--sp-4); }

/* ── Inputs ── */
.input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: var(--surface-secondary);
  border: 1px solid var(--border);
  color: var(--text-1);
  font-size: var(--text-base);
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition);
}
.input:focus { border-color: var(--accent); }
.input::placeholder { color: var(--text-4); }

/* ── Module (card container) ──
 * Use for any content block: dashboard widgets, data tables, etc.
 * Variants: .primary (hero, more padding + elevation), .flush (no padding)
 */
.module {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  padding: var(--card-pad);
}
.module.primary {
  padding: var(--card-pad-primary);
  box-shadow: var(--shadow-lg);
}
.module.flush { padding: 0; }

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-5);
}

.module-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.module-action {
  font-size: var(--text-sm);
  color: var(--accent);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}
.module-action:hover { text-decoration: underline; }

/* ── Data row ──
 * Standard list item pattern: name + meta on left, value/badge on right.
 * Use in transactions, inventory items, feed entries, etc.
 */
.data-row {
  display: flex;
  align-items: center;
  gap: var(--inner-gap);
  padding: var(--row-pad-y) var(--row-pad-x);
  transition: background var(--transition);
}
.data-row:hover { background: var(--card-hover); }
.data-row + .data-row { border-top: 1px solid var(--border); }
.data-row:nth-child(even) { background: color-mix(in srgb, var(--surface) 68%, var(--card)); }
.data-row:nth-child(even):hover { background: var(--card-hover); }

/* ── Badges ──
 * Semantic status badges. Variants: error, success, warning, accent, muted.
 */
.badge {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.badge.error { background: var(--error-dim); color: var(--error); }
.badge.success { background: var(--success-dim); color: var(--success); }
.badge.warning { background: var(--warning-bg); color: var(--warning); }
.badge.accent { background: var(--accent-dim); color: var(--accent); }
.badge.muted { background: var(--card-hover); color: var(--text-4); }

/* ── Tabs ──
 * Pill-style tab bar.
 */
.tab-bar { display: flex; gap: var(--sp-1); }
.tab {
  padding: var(--sp-2) 14px;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-3);
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
  display: flex;
  align-items: center;
  gap: var(--sp-1.5);
}
.tab:hover { color: var(--text-1); background: var(--card-hover); }
.tab.active { color: var(--text-1); background: var(--card); box-shadow: var(--shadow-xs); }

.tab-badge {
  font-size: var(--text-xs);
  font-family: var(--mono);
  background: var(--accent-dim);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  margin-left: var(--sp-1);
}

/* ── Section header ──
 * Uppercase label above a group of content.
 */
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: var(--sp-1.5);
}

/* ── Page wrapper ── */
.page { padding: var(--sp-8) 0 var(--sp-20); }
.page-header { margin-bottom: var(--section-gap); }
.page-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--sp-1);
}
.page-greeting {
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--text-1);
  line-height: var(--leading-tight);
}
.page-greeting strong { font-weight: 600; }

/* ── App surface (centered container) ── */
.app-surface {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  :root {
    --text-xs: 12px;
    --text-sm: 15px;
    --text-base: 16px;
    --text-md: 17px;
    --text-lg: 18px;
    --text-xl: 22px;
    --text-2xl: 26px;
    --text-3xl: 32px;

    --card-pad: var(--sp-4);
    --card-pad-primary: var(--sp-5);
    --row-pad-y: var(--sp-4);
    --section-gap: var(--sp-5);
  }
  .page-greeting { font-size: var(--text-xl); }
  .page { padding: var(--sp-5) 0 var(--sp-20); }
  .app-surface { padding: 0 var(--sp-5); }
}