/* ====================================================================
   THE DELTA DOSSIER — Editorial Finance Design System
   Font: Instrument Serif (display) + Satoshi (body)
   Palette: Deep navy + warm gold on cream
   ==================================================================== */

/* --- TOKENS -------------------------------------------------------- */
:root, [data-theme="light"] {
  /* Type scale */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.75rem + 0.3vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7rem);

  /* 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;

  /* Surfaces — warm cream */
  --color-bg: #f4f1eb;
  --color-surface: #ffffff;
  --color-surface-2: #faf8f4;
  --color-surface-offset: #edeae3;
  --color-border: #d8d4cb;
  --color-divider: #e2dfd8;

  /* Text — deep charcoal */
  --color-text: #1a1a17;
  --color-text-muted: #6b6860;
  --color-text-faint: #a09c93;

  /* Navy (structural) */
  --color-navy: #1b2537;
  --color-navy-light: #2d3f5a;

  /* Gold accent */
  --color-accent: #b8920a;
  --color-accent-hover: #9a7b08;
  --color-accent-soft: rgba(184, 146, 10, 0.10);
  --color-accent-medium: rgba(184, 146, 10, 0.18);

  /* Semantic */
  --color-success: #3a7d44;
  --color-error: #b83a2f;
  --color-success-soft: rgba(58, 125, 68, 0.10);
  --color-error-soft: rgba(184, 58, 47, 0.10);

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  /* Radius */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 26, 23, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 26, 23, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 26, 23, 0.12);

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* Dark mode */
[data-theme="dark"] {
  --color-bg: #0e1117;
  --color-surface: #161a22;
  --color-surface-2: #1c2029;
  --color-surface-offset: #12151c;
  --color-border: #2a2e38;
  --color-divider: #222630;
  --color-text: #e2e0db;
  --color-text-muted: #8a8780;
  --color-text-faint: #555249;
  --color-navy: #8faac8;
  --color-navy-light: #a8bdd4;
  --color-navy-bg: #0d1420;
  --color-accent: #d4af37;
  --color-accent-hover: #e0bf4d;
  --color-accent-soft: rgba(212, 175, 55, 0.10);
  --color-accent-medium: rgba(212, 175, 55, 0.16);
  --color-success: #6daa45;
  --color-error: #dd6961;
  --color-success-soft: rgba(109, 170, 69, 0.12);
  --color-error-soft: rgba(221, 105, 97, 0.12);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e1117;
    --color-surface: #161a22;
    --color-surface-2: #1c2029;
    --color-surface-offset: #12151c;
    --color-border: #2a2e38;
    --color-divider: #222630;
    --color-text: #e2e0db;
    --color-text-muted: #8a8780;
    --color-text-faint: #555249;
    --color-navy: #8faac8;
    --color-navy-light: #a8bdd4;
    --color-navy-bg: #0d1420;
    --color-accent: #d4af37;
    --color-accent-hover: #e0bf4d;
    --color-accent-soft: rgba(212, 175, 55, 0.10);
    --color-accent-medium: rgba(212, 175, 55, 0.16);
    --color-success: #6daa45;
    --color-error: #dd6961;
    --color-success-soft: rgba(109, 170, 69, 0.12);
    --color-error-soft: rgba(221, 105, 97, 0.12);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
  }
}

/* --- GLOBAL TYPOGRAPHY --------------------------------------------- */
body {
  font-variant-numeric: lining-nums proportional-nums;
}

.font-display {
  font-family: var(--font-display);
}

.tabular {
  font-variant-numeric: tabular-nums lining-nums;
}

/* --- LAYOUT -------------------------------------------------------- */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.container--wide {
  max-width: var(--content-wide);
}

/* --- STICKY NAV ---------------------------------------------------- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.topnav__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.topnav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.topnav__ticker {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topnav__price {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.topnav__links {
  display: flex;
  gap: var(--space-1);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.topnav__links::-webkit-scrollbar { display: none; }

.topnav__links a {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.topnav__links a:hover,
.topnav__links a.active {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.topnav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

/* --- HERO ---------------------------------------------------------- */
.hero {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-5);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.hero__eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero__headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
  max-width: 16ch;
  margin-inline: auto;
}

.hero__subtitle {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 36ch;
  margin-inline: auto;
}

.hero__meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero__meta span {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.hero__divider {
  width: 48px;
  height: 1px;
  background: var(--color-accent);
  margin: var(--space-8) auto var(--space-6);
}

.hero__earnings-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

.hero__earnings-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* --- SECTIONS ------------------------------------------------------ */
.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
  position: relative;
}

.section--alt {
  background: var(--color-surface);
}

.section--navy {
  background: var(--color-navy-bg, #1b2537);
  color: #e2e0db;
}

.section--navy .color-muted {
  color: rgba(226, 224, 219, 0.6);
}

.section--navy .section__number {
  color: var(--color-accent);
}

.section__header {
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}

.section__number {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  display: block;
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

.section__lead {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.7;
}

/* --- KPI STRIP ----------------------------------------------------- */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
  gap: var(--space-4);
  padding-block: var(--space-8);
}

.kpi-card {
  padding: var(--space-5) var(--space-5);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  opacity: 0;
  transition: opacity var(--transition-interactive);
}

.kpi-card:hover::before {
  opacity: 1;
}

.kpi-card__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.kpi-card__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.kpi-card__delta {
  font-size: var(--text-xs);
  font-weight: 600;
  margin-top: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

.kpi-card__delta--up {
  color: var(--color-success);
  background: var(--color-success-soft);
}

.kpi-card__delta--down {
  color: var(--color-error);
  background: var(--color-error-soft);
}

.kpi-card__delta--neutral {
  color: var(--color-text-muted);
  background: var(--color-accent-soft);
}

/* --- EDITORIAL TWO-COLUMN ------------------------------------------ */
.editorial-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .editorial-grid {
    grid-template-columns: 1fr 1fr;
    gap: clamp(var(--space-8), 4vw, var(--space-16));
  }
}

.editorial-grid--asymmetric {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .editorial-grid--asymmetric {
    grid-template-columns: 2fr 1fr;
  }
}

/* --- PROSE --------------------------------------------------------- */
.prose {
  max-width: 65ch;
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
}

.prose p + p {
  margin-top: var(--space-4);
}

.prose strong {
  font-weight: 600;
  color: var(--color-text);
}

.drop-cap::first-letter {
  font-family: var(--font-display);
  float: left;
  font-size: 3.4em;
  line-height: 0.8;
  padding-right: 0.08em;
  padding-top: 0.06em;
  color: var(--color-navy);
}

[data-theme="dark"] .drop-cap::first-letter {
  color: var(--color-accent);
}

/* --- PULL QUOTE ---------------------------------------------------- */
.pull-quote {
  border-left: 2px solid var(--color-accent);
  padding: var(--space-4) var(--space-6);
  margin-block: var(--space-8);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.5;
  max-width: 50ch;
}

.pull-quote cite {
  display: block;
  margin-top: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

/* --- DATA TABLE ---------------------------------------------------- */
.data-table {
  width: 100%;
  font-size: var(--text-sm);
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.data-table th {
  text-align: left;
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  padding: var(--space-3) var(--space-4);
  border-bottom: 2px solid var(--color-divider);
}

.data-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}

.data-table tbody tr:hover {
  background: var(--color-accent-soft);
}

.data-table .text-right { text-align: right; }
.data-table .text-center { text-align: center; }

.data-table .positive { color: var(--color-success); font-weight: 600; }
.data-table .negative { color: var(--color-error); font-weight: 600; }

/* --- PROBABILITY METER --------------------------------------------- */
.prob-meter {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.prob-meter__bar-bg {
  height: 8px;
  background: var(--color-divider);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.prob-meter__bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-success));
  border-radius: var(--radius-md);
  width: 0;
  transition: width 1.2s var(--ease-out);
}

.prob-meter__labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
}

/* --- SCENARIO CARDS ------------------------------------------------ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: var(--space-4);
}

.scenario-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
  position: relative;
  overflow: hidden;
}

.scenario-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.scenario-card:active {
  transform: translateY(0);
}

.scenario-card.expanded {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.scenario-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.scenario-card__name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

.scenario-card__prob {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-accent);
  line-height: 1;
}

.scenario-card__prob-bar {
  height: 4px;
  background: var(--color-divider);
  border-radius: 2px;
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.scenario-card__prob-fill {
  height: 100%;
  border-radius: 2px;
  width: 0;
  transition: width 1s var(--ease-out);
}

.scenario-card__details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out), opacity 0.3s ease;
  opacity: 0;
}

.scenario-card.expanded .scenario-card__details {
  max-height: 400px;
  opacity: 1;
}

.scenario-card__details p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
}

.scenario-card__detail-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  padding: var(--space-1) 0;
}

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

.scenario-card__detail-value {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* --- CHART CONTAINER ----------------------------------------------- */
.chart-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-block: var(--space-6);
}

.chart-wrap__title {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.chart-wrap canvas {
  width: 100% !important;
  max-height: 320px;
}

/* --- COMPETITIVE TABLE --------------------------------------------- */
.comp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: var(--space-4);
}

.comp-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--transition-interactive);
}

.comp-card--highlight {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.comp-card__ticker {
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
}

.comp-card__name {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.comp-card__row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
}

.comp-card__row:last-child { border-bottom: none; }

.comp-card__label {
  color: var(--color-text-muted);
}

.comp-card__value {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* --- TRADE RECOMMENDATION ------------------------------------------ */
.trade-box {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.trade-box__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.trade-box__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.trade-box__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
}

.trade-box__row:last-child { border-bottom: none; }

/* --- RISK CARDS ---------------------------------------------------- */
.risk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: var(--space-4);
}

.risk-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
}

.risk-card__severity {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

.risk-card__severity--high {
  color: var(--color-error);
  background: var(--color-error-soft);
}

.risk-card__severity--medium {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.risk-card__severity--low {
  color: var(--color-success);
  background: var(--color-success-soft);
}

.risk-card__title {
  font-weight: 600;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.risk-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- BIG NUMBER ---------------------------------------------------- */
.big-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1;
  color: var(--color-text);
}

.big-number--accent {
  color: var(--color-accent);
}

/* --- TAG ----------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.tag--green {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.tag--red {
  background: var(--color-error-soft);
  color: var(--color-error);
}

/* --- FUEL COMPARISON ----------------------------------------------- */
.fuel-comparison {
  display: flex;
  align-items: flex-end;
  gap: var(--space-8);
  padding: var(--space-8) 0;
}

.fuel-comparison__item {
  text-align: center;
}

.fuel-comparison__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.fuel-comparison__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
}

.fuel-comparison__arrow {
  font-size: var(--text-xl);
  color: var(--color-error);
  padding-bottom: var(--space-2);
}

/* --- SCROLL REVEAL ------------------------------------------------- */
.reveal {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .reveal {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Fallback for browsers without scroll-driven animations */
.reveal.is-visible {
  opacity: 1;
  transition: opacity 0.6s var(--ease-out);
}

/* --- FOOTER -------------------------------------------------------- */
.site-footer {
  padding: var(--space-12) var(--space-5);
  border-top: 1px solid var(--color-divider);
}

.site-footer__inner {
  max-width: var(--content-default);
  margin-inline: auto;
}

.site-footer__disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.7;
  max-width: 65ch;
}

.site-footer__sources {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.site-footer__sources h3 {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.site-footer__sources a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.site-footer__sources a:hover {
  color: var(--color-accent);
}

.site-footer__sources ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

.site-footer__credit {
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* --- OPTIONS GRID -------------------------------------------------- */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: var(--space-4);
}

.option-stat {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  text-align: center;
}

.option-stat__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.option-stat__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.option-stat__sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* --- TECHNICAL LEVELS ---------------------------------------------- */
.levels-strip {
  position: relative;
  height: 6px;
  background: var(--color-divider);
  border-radius: 3px;
  margin: var(--space-8) 0 var(--space-12);
}

.levels-strip__marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.levels-strip__label {
  position: absolute;
  top: 18px;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.levels-strip__name {
  position: absolute;
  bottom: 18px;
  transform: translateX(-50%);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  white-space: nowrap;
}

/* --- RESPONSIVE ---------------------------------------------------- */
@media (max-width: 768px) {
  .topnav__links { display: none; }

  .hero__headline {
    font-size: var(--text-2xl);
  }

  .editorial-grid {
    grid-template-columns: 1fr;
  }

  .fuel-comparison {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
  }

  .fuel-comparison__arrow {
    padding-bottom: 0;
  }

  .levels-strip__name {
    display: none;
  }
}

/* --- COLOR UTILITIES ----------------------------------------------- */
.color-muted { color: var(--color-text-muted); }
.color-faint { color: var(--color-text-faint); }
.color-accent { color: var(--color-accent); }
.color-success { color: var(--color-success); }
.color-error { color: var(--color-error); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }