/* ============================================================
   KILOWOTT DESIGN SYSTEM — TOKENS
   Single source of truth. All components read from these.
   ============================================================ */

:root {
  /* ---------- BRAND COLORS ---------- */
  --k-ink:        #0B0F14;   /* near-black, primary text, hero backgrounds */
  --k-ink-2:      #1A2230;   /* secondary surface dark */
  --k-ink-3:      #2B3544;   /* tertiary, borders on dark */

  --k-paper:      #FFFFFF;   /* primary surface */
  --k-paper-2:    #F6F4F0;   /* warm off-white, section breaks */
  --k-paper-3:    #EDEAE3;   /* warmer still, cards on paper */

  --k-red:        #E4022D;   /* signature — use sparingly */
  --k-red-soft:   #FCE5EA;   /* tinted bg for red accents */
  --k-red-ink:    #8A021B;   /* darkened red for text on paper */

  --k-rule:       #1A2230;   /* rules/borders on paper */
  --k-rule-soft:  #E2DED6;   /* soft divider on paper */
  --k-muted:      #5B6573;   /* secondary text on paper */
  --k-muted-dark: #8A95A5;   /* secondary text on ink */

  /* ---------- SEMANTIC ---------- */
  --bg:           var(--k-paper);
  --bg-2:         var(--k-paper-2);
  --bg-3:         var(--k-paper-3);
  --fg:           var(--k-ink);
  --fg-2:         var(--k-muted);
  --accent:       var(--k-red);
  --accent-ink:   var(--k-red-ink);
  --rule:         var(--k-rule-soft);
  --rule-strong:  var(--k-rule);

  /* ---------- TYPE ---------- */
  --font-display: "Newsreader", "Fraunces", ui-serif, Georgia, serif;
  --font-sans:    "DM Sans", "Inter Tight", ui-sans-serif, system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Display scale (editorial, large) */
  --fs-d1: clamp(3.5rem, 7vw, 6.25rem);   /* 56–100 */
  --fs-d2: clamp(2.75rem, 5.2vw, 4.5rem); /* 44–72 */
  --fs-d3: clamp(2rem, 3.6vw, 3rem);      /* 32–48 */

  /* UI scale */
  --fs-h1: 2.25rem;   /* 36 */
  --fs-h2: 1.5rem;    /* 24 */
  --fs-h3: 1.125rem;  /* 18 */
  --fs-body: 1rem;    /* 16 */
  --fs-sm: 0.875rem;  /* 14 */
  --fs-xs: 0.75rem;   /* 12 — eyebrows */

  --lh-tight: 1.04;
  --lh-snug:  1.2;
  --lh-body:  1.55;

  --tracking-eyebrow: 0.18em;
  --tracking-display: -0.02em;

  /* ---------- SPACING (8pt base) ---------- */
  --s-0:  0;
  --s-1:  4px;
  --s-2:  8px;
  --s-3:  12px;
  --s-4:  16px;
  --s-5:  24px;
  --s-6:  32px;
  --s-7:  48px;
  --s-8:  64px;
  --s-9:  96px;
  --s-10: 128px;

  /* Density multiplier (driven by Tweaks) */
  --density: 1;

  /* ---------- RADII ---------- */
  --r-0: 0;
  --r-1: 2px;
  --r-2: 4px;
  --r-3: 8px;
  --r-4: 12px;
  --r-pill: 999px;

  /* ---------- SHADOWS ---------- */
  --shadow-0: none;
  --shadow-1: 0 1px 0 rgba(11,15,20,0.06), 0 1px 2px rgba(11,15,20,0.04);
  --shadow-2: 0 2px 4px rgba(11,15,20,0.06), 0 8px 16px rgba(11,15,20,0.06);
  --shadow-3: 0 4px 8px rgba(11,15,20,0.08), 0 24px 48px rgba(11,15,20,0.10);

  /* ---------- LAYOUT ---------- */
  --container: 1280px;
  --gutter: 32px;
}

/* Dark mode */
[data-theme="dark"] {
  --bg:          var(--k-ink);
  --bg-2:        var(--k-ink-2);
  --bg-3:        var(--k-ink-3);
  --fg:          var(--k-paper);
  --fg-2:        var(--k-muted-dark);
  --rule:        #2B3544;
  --rule-strong: #3B4656;
  --shadow-1: 0 1px 0 rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-2: 0 2px 4px rgba(0,0,0,0.5), 0 8px 16px rgba(0,0,0,0.4);
  --shadow-3: 0 4px 8px rgba(0,0,0,0.6), 0 24px 48px rgba(0,0,0,0.5);
}

/* ---------- RESET + BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01","cv11";
}
h1,h2,h3,h4,h5 { margin: 0; font-weight: 500; letter-spacing: var(--tracking-display); line-height: var(--lh-snug); }
p { margin: 0; }
a { color: inherit; }
button { font: inherit; cursor: pointer; }

/* Display type — serif, tight */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
}
.display em {
  font-style: italic;
  font-variation-settings: "SOFT" 100, "WONK" 1;
}

/* Eyebrow label */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  font-weight: 500;
  color: var(--fg);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px; background: currentColor;
  display: inline-block;
}
.eyebrow--accent { color: var(--accent); }

/* ---------- LAYOUT ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section {
  padding: calc(var(--s-9) * var(--density)) 0;
}
.section--tight { padding: calc(var(--s-7) * var(--density)) 0; }

.grid { display: grid; gap: calc(var(--s-5) * var(--density)); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4, .grid-6 { grid-template-columns: 1fr 1fr; }
}

/* ---------- PRIMITIVES ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 22px;
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-pill);
  background: transparent; color: var(--fg);
  font-size: var(--fs-sm); font-weight: 500;
  letter-spacing: 0.02em;
  transition: all .2s ease;
}
.btn:hover { background: var(--fg); color: var(--bg); }
.btn--primary { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn--primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--ghost { border-color: transparent; }
.btn__arrow { transition: transform .2s ease; }
.btn:hover .btn__arrow { transform: translateX(3px); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border: 1px solid var(--rule); border-radius: var(--r-pill);
  font-size: var(--fs-xs); letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-2);
}

.card {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: var(--r-3);
  padding: calc(var(--s-6) * var(--density));
}

.rule { height: 1px; background: var(--rule); border: 0; margin: 0; }
.rule--strong { background: var(--rule-strong); }

/* Token row (label left, value right, rule between) */
.token-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  font-size: var(--fs-sm);
}
.token-row:last-child { border-bottom: 0; }
.token-row__label { color: var(--fg); }
.token-row__meta  { color: var(--fg-2); font-family: var(--font-mono); font-size: 13px; }

/* Page title block */
.page-header {
  padding-top: calc(var(--s-9) * var(--density));
  padding-bottom: calc(var(--s-7) * var(--density));
  border-bottom: 1px solid var(--rule);
}
.page-header__kicker { color: var(--accent); }
.page-header__title {
  font-family: var(--font-display);
  font-size: var(--fs-d2);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  margin-top: var(--s-4);
  max-width: 18ch;
}
.page-header__lede {
  margin-top: var(--s-5);
  max-width: 58ch;
  color: var(--fg-2);
  font-size: 1.0625rem;
  line-height: 1.6;
}
.page-header__meta {
  display: flex; gap: var(--s-5); margin-top: var(--s-6);
  font-size: var(--fs-xs); letter-spacing: var(--tracking-eyebrow); text-transform: uppercase;
  color: var(--fg-2);
}
.page-header__meta > div b { display: block; color: var(--fg); font-weight: 500; margin-top: 4px; letter-spacing: 0.02em; text-transform: none; font-size: var(--fs-sm); }

/* Section heading (inside pages) */
.section-head {
  display: grid; grid-template-columns: 1fr 2fr; gap: var(--s-8);
  align-items: start;
  margin-bottom: calc(var(--s-7) * var(--density));
}
.section-head__title {
  font-family: var(--font-display);
  font-size: var(--fs-d3);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
}
.section-head__body { color: var(--fg-2); font-size: 1.0625rem; line-height: 1.65; max-width: 58ch; }
@media (max-width: 900px) {
  .section-head { grid-template-columns: 1fr; gap: var(--s-4); }
}

/* Two-column editorial */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-8); }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

/* Do / Don't */
.dodont {
  border: 1px solid var(--rule);
  border-radius: var(--r-3);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.dodont__frame {
  aspect-ratio: 4/3;
  display: grid; place-items: center;
  background: var(--bg-2);
  padding: var(--s-6);
  position: relative;
}
.dodont__tag {
  position: absolute; top: 14px; left: 14px;
  font-size: var(--fs-xs); letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase; font-weight: 500;
  padding: 4px 10px; border-radius: var(--r-pill);
}
.dodont__tag--do    { background: #0B0F14; color: #fff; }
.dodont__tag--dont  { background: var(--accent); color: #fff; }
.dodont__caption {
  padding: var(--s-5);
  font-size: var(--fs-sm); color: var(--fg-2);
  border-top: 1px solid var(--rule);
  line-height: 1.5;
}
.dodont__caption b { color: var(--fg); font-weight: 500; }

/* Utility */
.mono { font-family: var(--font-mono); font-size: 13px; }
.muted { color: var(--fg-2); }
.accent-text { color: var(--accent); }
.num-lg { font-family: var(--font-display); font-size: var(--fs-d2); line-height: 1; letter-spacing: -0.03em; }

/* Scroll smooth */
html { scroll-behavior: smooth; }

/* Selection */
::selection { background: var(--accent); color: #fff; }