/* ============================================================
   Design Tokens — "Burn Rate" art direction
   Dark editorial / financial newsroom aesthetic
   Display: Fraunces (serif, editorial weight)
   Body:    Inter (clean, tabular numerals)
   Mono:    JetBrains Mono (numbers, callouts)
   ============================================================ */

:root, [data-theme='light'] {
  /* Type scale */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7.5rem);

  /* Spacing — 4px base */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;  --space-24: 6rem;
  --space-32: 8rem;

  /* Colors — Light (cream/parchment editorial) */
  --color-bg: #f4efe6;
  --color-surface: #ede6d9;
  --color-surface-2: #f8f3ea;
  --color-surface-offset: #e3dbcb;
  --color-divider: #c9bfa9;
  --color-border: #b5aa92;

  --color-text: #1a1814;
  --color-text-muted: #6b6354;
  --color-text-faint: #9b9181;
  --color-text-inverse: #f4efe6;

  --color-primary: #b8741a;        /* signal amber */
  --color-primary-hover: #9c5f12;
  --color-primary-highlight: #ecd9b8;

  --color-danger: #a02929;         /* burn red */
  --color-danger-highlight: #e8c8c4;

  --color-success: #4a6b2a;
  --color-blue: #2a4a6b;
  --color-purple: #5a3d7a;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px oklch(0.2 0.02 70 / 0.1);
  --shadow-md: 0 8px 24px oklch(0.2 0.02 70 / 0.12);
  --shadow-lg: 0 24px 60px oklch(0.15 0.02 70 / 0.18);

  --content-narrow: 680px;
  --content-default: 1040px;
  --content-wide: 1320px;

  --font-display: 'Fraunces', 'Times New Roman', serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

[data-theme='dark'] {
  --color-bg: #0e0c0a;
  --color-surface: #16130f;
  --color-surface-2: #1c1813;
  --color-surface-offset: #221d16;
  --color-divider: #2e2820;
  --color-border: #3a3327;

  --color-text: #ede4d3;
  --color-text-muted: #8a8170;
  --color-text-faint: #5a5347;
  --color-text-inverse: #0e0c0a;

  --color-primary: #e8a04a;
  --color-primary-hover: #f4b863;
  --color-primary-highlight: #3a2c18;

  --color-danger: #d65454;
  --color-danger-highlight: #3a1818;

  --color-success: #8aaf5a;
  --color-blue: #6a9bc7;
  --color-purple: #b18de0;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.5);
  --shadow-lg: 0 24px 60px oklch(0 0 0 / 0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e0c0a;
    --color-surface: #16130f;
    --color-surface-2: #1c1813;
    --color-surface-offset: #221d16;
    --color-divider: #2e2820;
    --color-border: #3a3327;
    --color-text: #ede4d3;
    --color-text-muted: #8a8170;
    --color-text-faint: #5a5347;
    --color-text-inverse: #0e0c0a;
    --color-primary: #e8a04a;
    --color-primary-hover: #f4b863;
    --color-primary-highlight: #3a2c18;
    --color-danger: #d65454;
    --color-danger-highlight: #3a1818;
    --color-success: #8aaf5a;
    --color-blue: #6a9bc7;
    --color-purple: #b18de0;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
    --shadow-md: 0 8px 24px oklch(0 0 0 / 0.5);
    --shadow-lg: 0 24px 60px oklch(0 0 0 / 0.6);
  }
}

/* ============================================================
   Layout
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-10));
}
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
}

/* ============================================================
   Header
   ============================================================ */

.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid color-mix(in oklab, var(--color-border) 40%, transparent);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: var(--space-3);
  gap: var(--space-4);
}
.brand {
  display: flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text);
  text-decoration: none;
}
.brand svg { color: var(--color-primary); }
.brand small {
  font-family: var(--font-body); font-size: var(--text-xs);
  color: var(--color-text-muted); font-weight: 400; letter-spacing: 0.05em;
  text-transform: uppercase; margin-left: var(--space-2);
  padding-left: var(--space-2);
  border-left: 1px solid var(--color-divider);
}
.header__actions { display: flex; gap: var(--space-2); align-items: center; }
.icon-btn {
  width: 36px; height: 36px; display: grid; place-items: center;
  color: var(--color-text-muted); border-radius: var(--radius-full);
}
.icon-btn:hover { color: var(--color-text); background: var(--color-surface-offset); }

/* ============================================================
   Hero
   ============================================================ */

.hero {
  padding-top: clamp(var(--space-12), 8vw, var(--space-24));
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
  overflow: hidden;
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-6);
}
.hero__eyebrow::before {
  content: ''; width: 32px; height: 1px;
  background: var(--color-primary);
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin-bottom: var(--space-6);
  font-variation-settings: "SOFT" 30, "WONK" 1;
}
.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}
.hero__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-10);
}
.hero__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-6);
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.hero__meta strong { color: var(--color-text); font-weight: 500; }

/* Hero number cards */
.hero__numbers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-1);
  margin-top: var(--space-12);
  background: var(--color-border);
  border: 1px solid var(--color-border);
}
.stat {
  background: var(--color-bg);
  padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-2);
}
.stat__label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--color-text-muted);
}
.stat__value {
  font-family: var(--font-display); font-size: var(--text-2xl);
  font-weight: 400; letter-spacing: -0.02em;
  color: var(--color-text); font-variant-numeric: tabular-nums;
}
.stat__value--accent { color: var(--color-primary); }
.stat__value--danger { color: var(--color-danger); }
.stat__note { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ============================================================
   Section headers
   ============================================================ */

.section-header { margin-bottom: var(--space-12); max-width: 60ch; }
.section-header__chapter {
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.2em;
  color: var(--color-primary); margin-bottom: var(--space-4);
}
.section-header__title {
  font-family: var(--font-display); font-size: var(--text-2xl);
  font-weight: 400; letter-spacing: -0.02em; line-height: 1.05;
  margin-bottom: var(--space-5);
}
.section-header__title em { font-style: italic; color: var(--color-primary); }
.section-header__lead {
  font-size: var(--text-lg); color: var(--color-text-muted);
  line-height: 1.5;
}

/* ============================================================
   Money flow diagram (Section 1)
   ============================================================ */

.flow {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 4vw, var(--space-12));
  position: relative;
}
.flow__svg {
  width: 100%;
  height: auto;
  max-height: 520px;
}
.flow__legend {
  display: flex; flex-wrap: wrap; gap: var(--space-6);
  margin-top: var(--space-8); padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-sm); color: var(--color-text-muted);
}
.flow__legend-item {
  display: flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.08em;
}
.flow__legend-dot {
  width: 10px; height: 10px; border-radius: var(--radius-full);
  background: var(--color-primary);
}
.flow__legend-dot--danger { background: var(--color-danger); }

/* ============================================================
   Token economics — visual scale comparison
   ============================================================ */

.token-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-1);
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.token-card {
  background: var(--color-bg);
  padding: var(--space-8);
  display: flex; flex-direction: column; gap: var(--space-4);
}
.token-card__name {
  font-family: var(--font-display); font-size: var(--text-lg);
  font-weight: 400; letter-spacing: -0.01em;
}
.token-card__price {
  font-family: var(--font-mono); font-size: var(--text-xl);
  font-variant-numeric: tabular-nums; color: var(--color-primary);
  letter-spacing: -0.02em;
}
.token-card__price-meta {
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.1em;
}
.token-card__note { font-size: var(--text-sm); color: var(--color-text-muted); }

/* ============================================================
   $20 Plan Calculator (interactive)
   ============================================================ */

.calc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}
@media (min-width: 880px) {
  .calc { grid-template-columns: 1fr 1.2fr; }
}

.calc__controls { display: flex; flex-direction: column; gap: var(--space-8); }
.calc__control { display: flex; flex-direction: column; gap: var(--space-3); }
.calc__label {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: var(--space-3);
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--color-text-muted);
}
.calc__label > span:first-child { flex: 1 1 auto; min-width: 0; line-height: 1.35; }
.calc__label > strong { flex: 0 0 auto; white-space: nowrap; }
.calc__label strong {
  font-family: var(--font-display); font-style: italic;
  font-size: var(--text-lg); font-weight: 400;
  color: var(--color-primary);
  text-transform: none; letter-spacing: -0.01em;
}
.calc__slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px; background: var(--color-divider);
  border-radius: var(--radius-full); outline: none;
}
.calc__slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 22px; height: 22px; border-radius: var(--radius-full);
  background: var(--color-primary); cursor: pointer;
  border: 3px solid var(--color-bg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-interactive);
}
.calc__slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.calc__slider::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: var(--radius-full);
  background: var(--color-primary); cursor: pointer;
  border: 3px solid var(--color-bg); box-shadow: var(--shadow-sm);
}
.calc__hint { font-size: var(--text-xs); color: var(--color-text-faint); }

.calc__model-select {
  display: flex; gap: var(--space-1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-1);
}
.calc__model-btn {
  flex: 1; padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-text-muted); border-radius: var(--radius-sm);
}
.calc__model-btn[aria-pressed='true'] {
  background: var(--color-primary); color: var(--color-text-inverse);
}

.calc__result {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-4);
}
.calc__row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding-block: var(--space-3);
  border-bottom: 1px dashed var(--color-divider);
  gap: var(--space-3);
}
.calc__row:last-of-type { border-bottom: none; }
.calc__row-label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-text-muted);
}
.calc__row-value {
  font-family: var(--font-mono); font-size: var(--text-base);
  font-variant-numeric: tabular-nums; font-weight: 500;
  color: var(--color-text);
}
.calc__verdict {
  margin-top: var(--space-2);
  padding: var(--space-5);
  background: var(--color-surface-offset);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
}
.calc__verdict[data-state='burn'] {
  background: var(--color-danger-highlight);
  border-left-color: var(--color-danger);
}
.calc__verdict[data-state='profit'] {
  background: oklch(from var(--color-success) l c h / 0.18);
  border-left-color: var(--color-success);
}
.calc__verdict-label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--color-text-muted); margin-bottom: var(--space-2);
}
.calc__verdict-text {
  font-family: var(--font-display); font-size: var(--text-lg);
  font-style: italic; line-height: 1.3;
}

/* ============================================================
   $200 plan comparison (two columns)
   ============================================================ */

.compare {
  display: grid; gap: var(--space-1);
  grid-template-columns: 1fr;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
@media (min-width: 800px) { .compare { grid-template-columns: 1fr 1fr; } }

.compare__col {
  background: var(--color-bg);
  padding: clamp(var(--space-6), 4vw, var(--space-8));
  display: flex; flex-direction: column; gap: var(--space-5);
}
.compare__brand {
  display: flex; justify-content: space-between; align-items: baseline;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.compare__name {
  font-family: var(--font-display); font-size: var(--text-xl);
  font-weight: 400; letter-spacing: -0.02em;
}
.compare__price {
  font-family: var(--font-mono); font-size: var(--text-base);
  color: var(--color-primary);
}
.compare__list {
  display: flex; flex-direction: column; gap: var(--space-3);
  list-style: none;
}
.compare__list li {
  display: flex; gap: var(--space-3); align-items: baseline;
  font-size: var(--text-sm); color: var(--color-text);
  line-height: 1.5;
}
.compare__list li::before {
  content: '+'; color: var(--color-primary);
  font-family: var(--font-mono); font-size: var(--text-base);
  font-weight: 600; line-height: 1.4;
  flex-shrink: 0; width: 14px;
}
.compare__list li[data-type='catch']::before {
  content: '−'; color: var(--color-danger);
}
.compare__list li > span { flex: 1; }
.compare__pull {
  margin-top: auto;
  padding: var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-sm);
  font-family: var(--font-display); font-style: italic;
  font-size: var(--text-base); line-height: 1.4;
  color: var(--color-text);
}

/* ============================================================
   Burn rate chart
   ============================================================ */

.burn-chart {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
}
.burn-chart canvas { max-height: 380px; width: 100% !important; }
.burn-chart__caption {
  margin-top: var(--space-4); padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs); color: var(--color-text-faint);
  font-family: var(--font-mono);
}

/* ============================================================
   Two-column "true / not true" verdict
   ============================================================ */

.verdict-grid {
  display: grid; grid-template-columns: 1fr; gap: var(--space-6);
}
@media (min-width: 800px) { .verdict-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); } }

.verdict-card {
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
}
.verdict-card--danger { border-top-color: var(--color-danger); }

.verdict-card__label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--color-primary); margin-bottom: var(--space-4);
}
.verdict-card--danger .verdict-card__label { color: var(--color-danger); }

.verdict-card__title {
  font-family: var(--font-display); font-size: var(--text-xl);
  font-weight: 400; letter-spacing: -0.01em; margin-bottom: var(--space-5);
  line-height: 1.15;
}
.verdict-card ul {
  list-style: none; display: flex; flex-direction: column; gap: var(--space-4);
}
.verdict-card li {
  font-size: var(--text-sm); color: var(--color-text-muted);
  padding-left: var(--space-5); position: relative; line-height: 1.55;
}
.verdict-card li::before {
  content: ''; position: absolute; left: 0; top: 0.6em;
  width: 8px; height: 1px; background: var(--color-text-faint);
}

/* ============================================================
   Pull quote
   ============================================================ */

.pull {
  margin-block: var(--space-12);
  padding: var(--space-10) var(--space-8);
  border-block: 1px solid var(--color-divider);
  text-align: center;
}
.pull blockquote {
  font-family: var(--font-display); font-style: italic;
  font-size: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  font-weight: 400; line-height: 1.2; letter-spacing: -0.02em;
  max-width: 22ch; margin-inline: auto;
  color: var(--color-text);
}
.pull blockquote em { color: var(--color-primary); font-style: normal; }
.pull cite {
  display: block; margin-top: var(--space-6);
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--color-text-faint); font-style: normal;
}

/* ============================================================
   Footer
   ============================================================ */

footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
  margin-top: var(--space-16);
}
.footer__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: var(--space-6); align-items: flex-start;
}
.footer__col h4 {
  font-family: var(--font-mono); font-size: var(--text-xs);
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--color-text-muted); margin-bottom: var(--space-3);
  font-weight: 500;
}
.footer__col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.footer__col a {
  color: var(--color-text-muted); text-decoration: none;
  font-size: var(--text-sm); border-bottom: 1px solid transparent;
}
.footer__col a:hover { color: var(--color-primary); border-bottom-color: currentColor; }
.footer__meta {
  margin-top: var(--space-8); padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================================
   Reveal animations
   ============================================================ */

[data-reveal] {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal].is-revealed { opacity: 1; transform: translateY(0); }

/* ============================================================
   Subtle texture overlay (paper grain)
   ============================================================ */

body::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.6;
}
header, main, footer { position: relative; z-index: 2; }