/* ================================================================
   PLEPIC DESIGN SYSTEM — Source of Truth
   Locked palette: 2026-04-01
   ================================================================
   This file defines all design tokens, base styles, and component
   patterns. The production stylesheet (css/styles.css) implements
   these; design-system.html renders them as a visual reference.
   ================================================================ */


/* ================================================================
   1. DESIGN TOKENS
   ================================================================ */

:root {
  /* ── Green system ── H=137°, S=73% (vivid S=100%)
     73% is system saturation. 100% is the decorative exception. */
  --green-surface: #edfcf1;   /* S73%  L96%  — tinted backgrounds */
  --green-light:   #c5f6d3;   /* S73%  L87%  — badge fills, borders */
  --green-vivid:   #00c638;   /* S100% L39%  — decorative: dots, fills. Headings on dark. NOT text on light. */
  --green-brand:   #137b30;   /* S73%  L28%  — logo, headings, links. AA on cream (5.0:1) and white (5.4:1). */
  --green-dark:    #0d5822;   /* S73%  L20%  — body text on light. AAA on cream (8.1:1). */

  /* ── Accent ── H=15°, S=73% (saturation-matched)
     Split-complementary of H=137°. ONE per viewport. */
  --accent:        #e26c45;   /* S73%  L58%  — CTA buttons, urgency. AA-large on light, AA on dark (5.3:1). */

  /* ── Neutrals ── */
  --bg:            #faf7f2;   /* Page background (warm cream) */
  --bg-alt:        #f3efe7;   /* Alternating sections */
  --surface:       #ffffff;   /* Cards, panels */
  --dark:          #1c1c1a;   /* Dark sections, primary text */
  --dark-surface:  #262624;   /* Dark-mode card/panel surface */

  /* ── Text ── */
  --text:          #1c1c1a;   /* Primary — 16.0:1 on cream */
  --text-2:        #4a4a45;   /* Secondary — 8.3:1 on cream */
  --text-3:        #6b6b60;   /* Muted — 5.0:1 on cream (AA) */

  /* ── Borders ── */
  --border:        #e5e2dc;   /* Light context */
  --border-dark:   #3a3a38;   /* Dark context */

  /* ── Typography ── */
  --font-display:  'Zilla Slab', Georgia, serif;
  --font-body:     'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', monospace;

  /* ── Spacing ── */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* ── Layout ── */
  --max-width:     1120px;
  --header-height: 64px;

  /* ── Transitions ── */
  --transition-fast:   150ms ease;
  --transition-base:   300ms ease;
  --transition-smooth: 300ms cubic-bezier(0.16, 1, 0.3, 1);
}


/* ================================================================
   2. RESET & BASE
   ================================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--green-brand);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:focus-visible {
  outline: 2px solid var(--green-vivid);
  outline-offset: 2px;
  border-radius: 2px;
}


/* ================================================================
   3. TYPOGRAPHY
   ================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 2rem + 3vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 1.25rem + 2vw, 2.25rem); font-weight: 600; }
h3 { font-size: clamp(1.15rem, 1rem + 0.5vw, 1.5rem); }
h4 { font-size: 1.15rem; }

p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }


/* ================================================================
   4. LAYOUT
   ================================================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}


/* ================================================================
   5. BUTTONS
   ================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  line-height: normal;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
.btn:hover { opacity: 0.85; }

/* Primary — accent orange, white text. ONE accent-colored element per viewport (button OR badge, never both). */
.btn-primary {
  background: var(--accent);
  color: #fff;
  padding: 1rem 2.25rem;
  border-radius: 14px;
  font-size: 1rem;
}

/* Outline — green brand border + text */
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--green-brand);
  color: var(--green-brand);
  padding: 0.55rem 1.15rem;
  border-radius: 10px;
  font-size: 0.85rem;
}

/* Ghost — underlined link-style */
.btn-ghost {
  background: transparent;
  color: var(--green-brand);
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0.55rem 0.5rem;
  font-size: 0.85rem;
}

/* Dark context overrides */
.on-dark .btn-outline {
  border-color: var(--green-vivid);
  color: var(--green-vivid);
}
.on-dark .btn-ghost {
  color: var(--green-vivid);
}


/* ================================================================
   6. BADGES
   ================================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  line-height: normal;
  border-radius: 20px 4px 16px 4px; /* organic asymmetry */
}

.badge-default {
  background: var(--green-surface);
  color: var(--green-dark);
  border: 1px solid var(--green-light);
}

/* Urgency — only when no other accent-colored element is in the same viewport */
.badge-urgency {
  background: #fdf0eb;
  color: #a3502e;
  border: 1px solid #f9d4c4;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-vivid);
  flex-shrink: 0;
}
.badge-urgency .badge-dot {
  background: var(--accent);
}

/* Dark context */
.on-dark .badge-default {
  background: rgba(0, 198, 56, 0.12);
  color: #cdeed6;
  border-color: rgba(0, 198, 56, 0.2);
}
.on-dark .badge-urgency {
  background: rgba(226, 108, 69, 0.15);
  color: var(--accent);
  border-color: rgba(226, 108, 69, 0.25);
}


/* ================================================================
   7. CARDS & PANELS
   ================================================================ */

.panel {
  border-radius: 14px;
  padding: var(--space-xl);
}
.panel-white {
  background: var(--surface);
  border: 1px solid var(--border);
}
.panel-cream {
  background: var(--bg);
  border: 1px solid var(--border);
}
.panel-dark {
  background: var(--dark);
  border: 1px solid var(--border-dark);
}

/* Info card — green tinted */
.card-info {
  background: var(--green-surface);
  border: 1px solid var(--green-light);
  border-radius: 10px;
  padding: var(--space-md);
}
.card-info h4 { color: var(--green-dark); }
.card-info p  { color: var(--green-brand); font-size: 0.78rem; }

.on-dark .card-info {
  background: rgba(0, 198, 56, 0.1);
  border-color: rgba(0, 198, 56, 0.18);
}
.on-dark .card-info h4 { color: var(--green-vivid); }
.on-dark .card-info p  { color: #cdeed6; }


/* ================================================================
   8. CODE SNIPPETS
   ================================================================ */

.code-block {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: normal;
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

/* Standard — white bg, bordered */
.code-block-default {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}
.code-block-default .comment { color: var(--text-3); }
.code-block-default .keyword { color: var(--green-brand); }

/* Hero decorative — no bg, muted */
.code-block-hero {
  background: none;
  border: none;
  padding: 0;
  opacity: 0.6;
  color: var(--green-brand);
}

/* Dark context */
.on-dark .code-block-default {
  background: var(--dark-surface);
  border-color: var(--border-dark);
  color: #e5e2dc;
}
.on-dark .code-block-default .comment { color: #6b6b60; }
.on-dark .code-block-default .keyword { color: var(--green-vivid); }
.on-dark .code-block-hero { color: var(--green-vivid); }


/* ================================================================
   9. LINKS
   ================================================================ */

.link {
  color: var(--green-brand);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-size: 0.85rem;
}
.link-separator {
  color: var(--text-3);
  margin: 0 0.35rem;
}

.on-dark .link { color: var(--green-vivid); }
.on-dark .link-separator { color: #6b6b60; }


/* ================================================================
   10. SECTION LABELS
   ================================================================ */

.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: normal;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--green-dark);
}

.label-muted {
  color: var(--text-3);
}

.on-dark .label { color: var(--green-vivid); }
.on-dark .label-muted { color: #6b6b60; }


/* ================================================================
   11. LOGO & WORDMARK
   ================================================================ */

/* Placeholder — logo and wordmark lockup coming soon.
   Expected structure:
   .logo-lockup > .logo-butterfly (SVG) + .logo-wordmark (Zilla Slab 700)

   Rules:
   - Light: --green-brand strokes, --green-vivid fills
   - Dark:  --green-vivid for both
   - On brand bg: white at reduced opacity
   - Gap: 0.6rem, vertically center-aligned
*/


/* ================================================================
   12. PROGRESS BAR
   ================================================================ */

.progress-bar {
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--green-brand), var(--green-vivid), transparent);
  margin-top: var(--space-sm);
}
.on-dark .progress-bar {
  background: linear-gradient(90deg, var(--green-vivid), transparent);
}


/* ================================================================
   13. DARK SECTION CONTEXT
   ================================================================
   Apply .on-dark to any container with --dark background.
   Component overrides are co-located with each component above. */

.on-dark { color: #e5e2dc; }
.on-dark h1,
.on-dark h2,
.on-dark h3,
.on-dark h4 { color: #e5e2dc; }
.on-dark p { color: #a3a39a; }


/* ================================================================
   DESIGN SYSTEM REFERENCE PAGE STYLES
   Only used by design-system.html — not production.
   ================================================================ */

.ds-page { padding: var(--space-2xl) 0; }

.ds-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}
.ds-header h1 .brand { color: var(--green-brand); }
.ds-header p {
  color: var(--text-2);
  font-size: 1rem;
  max-width: 640px;
  line-height: 1.6;
}

.ds-section {
  margin-bottom: var(--space-3xl);
}

.ds-section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: var(--space-lg);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.ds-note {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.6;
  max-width: 640px;
  margin-bottom: var(--space-lg);
}

.ds-locked {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 4px;
  background: #dcfce7;
  color: #065f28;
  margin-left: var(--space-sm);
  vertical-align: middle;
}

.ds-wip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 4px;
  background: #fefce8;
  color: #854d0e;
  margin-left: var(--space-sm);
  vertical-align: middle;
}

/* Swatch strips */
.ds-swatch-strip {
  display: flex;
  gap: 1px;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: var(--space-sm);
}
.ds-sw {
  flex: 1;
  padding: 1.25rem 0.5rem;
  text-align: center;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.1rem;
}
.ds-sw-name  { font-family: var(--font-mono); font-size: 0.5rem; font-weight: 700; text-transform: uppercase; }
.ds-sw-hex   { font-family: var(--font-mono); font-size: 0.65rem; font-weight: 700; }
.ds-sw-meta  { font-family: var(--font-mono); font-size: 0.48rem; opacity: 0.65; }

/* Token table */
.ds-token-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.ds-token-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
.ds-token-table td {
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--bg);
}
.ds-token-table code { font-family: var(--font-mono); font-size: 0.78rem; }
.ds-swatch-dot {
  display: inline-block;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  vertical-align: middle;
  margin-right: 6px;
  border: 1px solid var(--border);
}

/* Contrast tags */
.ds-ct {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 3px;
}
.ds-ct-pass { background: #dcfce7; color: #065f28; }
.ds-ct-warn { background: #fefce8; color: #854d0e; }
.ds-ct-fail { background: #fef2f2; color: #991b1b; }

/* Grids */
.ds-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
.ds-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.ds-grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.25rem; }
@media (max-width: 900px) {
  .ds-grid-2, .ds-grid-3 { grid-template-columns: 1fr; }
  .ds-grid-5 { grid-template-columns: 1fr 1fr; }
}

/* Rules list */
.ds-rules {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.8;
  padding-left: 1.25rem;
}
.ds-rules strong { color: var(--text); }

/* Btn row for demos */
.ds-btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Spacing demo */
.ds-spacing-row {
  display: flex;
  align-items: flex-end;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.ds-spacing-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}
.ds-spacing-block {
  background: var(--green-light);
  border: 1px solid var(--green-brand);
  border-radius: 4px;
}
.ds-spacing-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
}