/* ═══ Buy the World a Coke Index ═══════════════════════════════════════════
   Aesthetic: vintage carmine-red + cream + warm gold. Playful, high-contrast,
   retro-modern. Feels like a Time magazine feature crossed with a soda-fountain
   menu board. NOT TWF's navy-academic look — deliberately different.
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --carmine:      #c8102e;
  --carmine-deep: #8a0a1e;
  --cream:        #f9f4ec;
  --cream-dark:   #ecdfc9;
  --gold:         #e8b923;
  --gold-deep:    #b8901a;
  --chocolate:    #3c2415;
  --sage:         #6b9080;
  --ink:          #1a0f06;
  --ink-muted:    #6b5d51;
  --paper:        #fbf7ef;

  --display: 'Archivo Black', 'Arial Black', sans-serif;
  --serif:   'Libre Caslon Text', Georgia, serif;
  --sans:    'Space Grotesk', system-ui, sans-serif;
  --mono:    'JetBrains Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  /* Subtle newsprint-style grain */
  background-image:
    radial-gradient(circle at 20% 30%, rgba(60, 36, 21, 0.02) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(200, 16, 46, 0.03) 0%, transparent 40%);
}

.wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
  position: relative;
}

/* ─── HEADER ─────────────────────────────────────────────────────────── */
.site-header {
  background: var(--carmine);
  color: var(--cream);
  border-bottom: 6px solid var(--gold);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s;
}
.brand:hover { transform: translateX(-2px); }
.brand-bottle {
  width: 34px;
  height: 52px;
  color: var(--cream);
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.2));
}
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-line1 {
  font-family: var(--display);
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  color: var(--cream);
}
.brand-line2 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--gold);
  margin-top: 2px;
  letter-spacing: 0.04em;
}
nav {
  display: flex;
  gap: 1.75rem;
  font-family: var(--sans);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
nav a {
  color: var(--cream);
  text-decoration: none;
  opacity: 0.85;
  transition: opacity 0.2s, color 0.2s;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
nav a:hover { color: var(--gold); opacity: 1; border-bottom-color: var(--gold); }

@media (max-width: 820px) {
  nav { display: none; }
}

/* ─── HERO ─────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  background:
    linear-gradient(180deg, var(--carmine) 0%, var(--carmine-deep) 100%);
  color: var(--cream);
  padding: clamp(3rem, 7vw, 6rem) 0 clamp(4rem, 8vw, 6rem);
  overflow: hidden;
  border-bottom: 6px solid var(--gold);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      45deg,
      rgba(232, 185, 35, 0.04) 0px,
      rgba(232, 185, 35, 0.04) 2px,
      transparent 2px,
      transparent 14px
    );
  pointer-events: none;
}
.hero-fizz {
  position: absolute;
  pointer-events: none;
  color: var(--gold);
  opacity: 0.14;
  width: 240px;
  height: 240px;
  animation: fizzFloat 6s ease-in-out infinite;
}
.hero-fizz-l { top: 15%; left: -30px; }
.hero-fizz-r { bottom: 10%; right: -30px; animation-delay: -3s; }
.hero-fizz svg { width: 100%; height: 100%; }
@keyframes fizzFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-24px); }
}
.hero-wrap {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}
@media (max-width: 900px) {
  .hero-wrap { grid-template-columns: 1fr; gap: 2rem; }
}

.kicker {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
  font-weight: 500;
}
.hero-title {
  font-family: var(--display);
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--cream);
  margin-bottom: 1.5rem;
  max-width: 18ch;
}
.hero-value {
  font-family: var(--display);
  font-size: clamp(3.2rem, 8vw, 5.5rem);
  line-height: 1;
  color: var(--gold);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  text-shadow:
    0 3px 0 var(--carmine-deep),
    0 6px 20px rgba(0, 0, 0, 0.3);
  font-variant-numeric: tabular-nums;
}
.hero-subvalue {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--cream);
  opacity: 0.88;
  margin-bottom: 1.75rem;
  font-variant-numeric: tabular-nums;
}
.hero-blurb {
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.55;
  color: var(--cream);
  opacity: 0.94;
  margin-bottom: 1.75rem;
  max-width: 48ch;
}
.hero-blurb em {
  color: var(--gold);
  font-style: italic;
  font-weight: 700;
}
.hero-growth {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.growth-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.65rem 1.1rem;
  background: var(--gold);
  color: var(--carmine-deep);
  font-family: var(--display);
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
  border-radius: 2px;
  box-shadow: 0 3px 0 rgba(0,0,0,0.2);
}
.growth-chip small {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.85;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}
.hero-art {
  display: block;
  width: 100%;
  max-width: 440px;
  height: auto;
  filter:
    drop-shadow(0 18px 0 rgba(60, 36, 21, 0.25))
    drop-shadow(0 30px 60px rgba(138, 10, 30, 0.45));
  transform: rotate(-1.5deg);
  transition: transform 0.4s ease;
  animation: heroFloat 7s ease-in-out infinite;
}
.hero-art:hover {
  transform: rotate(0deg) scale(1.02);
}
@keyframes heroFloat {
  0%, 100% { transform: rotate(-1.5deg) translateY(0); }
  50%      { transform: rotate(-1.5deg) translateY(-10px); }
}

/* ─── FACTS STRIP ─────────────────────────────────────────────────── */
.facts-strip {
  background: var(--cream-dark);
  padding: clamp(2rem, 4vw, 3rem) 0;
  border-bottom: 2px solid var(--chocolate);
}
.fact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.fact {
  background: var(--paper);
  padding: 1.5rem 1.4rem;
  border-left: 5px solid var(--carmine);
  box-shadow: 0 2px 0 var(--chocolate);
  position: relative;
}
.fact-label {
  font-family: var(--sans);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--chocolate);
  margin-bottom: 0.5rem;
  font-weight: 600;
}
.fact-value {
  font-family: var(--display);
  font-size: 1.35rem;
  color: var(--carmine);
  line-height: 1.15;
  margin-bottom: 0.45rem;
  font-variant-numeric: tabular-nums;
}
.fact-detail {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--ink-muted);
  line-height: 1.4;
}

/* ─── SECTIONS ─────────────────────────────────────────────────────── */
section {
  padding: clamp(3.5rem, 6vw, 5.5rem) 0;
}

.section-hat {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}
.hat-num {
  font-family: var(--display);
  font-size: 3rem;
  color: var(--gold);
  line-height: 1;
  -webkit-text-stroke: 2px var(--carmine);
  text-stroke: 2px var(--carmine);
  color: transparent;
}
.hat-label {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--carmine);
  font-weight: 700;
  border-bottom: 2px solid var(--carmine);
  padding-bottom: 2px;
}
.section-title {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.15;
  color: var(--chocolate);
  margin-bottom: 1.25rem;
  max-width: 28ch;
}
.section-lede {
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--ink);
  max-width: 68ch;
  margin-bottom: 2.5rem;
}

/* ─── TIERS ───────────────────────────────────────────────────────── */
.framework {
  background: var(--paper);
}
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}
.tier {
  background: var(--cream);
  padding: 1.75rem 1.5rem;
  border-top: 6px solid var(--chocolate);
  box-shadow: 0 3px 0 var(--chocolate), 0 6px 18px rgba(60, 36, 21, 0.1);
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.tier:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 var(--chocolate), 0 9px 22px rgba(60, 36, 21, 0.15);
}
.tier-1 { border-top-color: var(--carmine); }
.tier-2 { border-top-color: var(--gold); }
.tier-3 { border-top-color: var(--sage); }
.tier-4 { border-top-color: var(--chocolate); }
.tier-hero {
  background: var(--gold);
  color: var(--chocolate);
  border-top-width: 10px;
  box-shadow: 0 5px 0 var(--carmine-deep), 0 8px 22px rgba(200, 16, 46, 0.25);
}
.tier-hero:hover { transform: translateY(-4px); }
.tier-badge {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--chocolate);
  background: rgba(60, 36, 21, 0.08);
  padding: 0.3rem 0.6rem;
  border-radius: 2px;
  margin-bottom: 0.85rem;
  font-weight: 600;
}
.tier-hero .tier-badge {
  background: var(--carmine);
  color: var(--cream);
}
.tier h3 {
  font-family: var(--display);
  font-size: 1.25rem;
  color: var(--chocolate);
  margin-bottom: 0.6rem;
  line-height: 1.15;
}
.tier-number {
  font-family: var(--display);
  font-size: 2.25rem;
  color: var(--carmine);
  font-variant-numeric: tabular-nums;
  margin-bottom: 0.75rem;
  line-height: 1;
}
.tier-hero .tier-number { color: var(--carmine-deep); }
.tier p {
  font-family: var(--serif);
  font-size: 0.94rem;
  line-height: 1.5;
  color: var(--ink-muted);
}
.tier-hero p { color: var(--chocolate); opacity: 0.88; }

/* ─── CHART CARD ──────────────────────────────────────────────────── */
.chart-card {
  background: var(--cream);
  padding: 2rem 2rem 1.5rem;
  box-shadow: 0 3px 0 var(--chocolate), 0 6px 18px rgba(60, 36, 21, 0.1);
  border-top: 6px solid var(--carmine);
}
.chart-title {
  font-family: var(--display);
  font-size: 1.1rem;
  color: var(--chocolate);
  margin-bottom: 1.25rem;
}
.chart-wrap {
  min-height: 400px;
  position: relative;
}
.chart-wrap canvas { width: 100% !important; max-height: 480px; }
.chart-footnote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--ink-muted);
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--cream-dark);
  line-height: 1.5;
}
.chart-footnote em {
  color: var(--carmine);
  font-weight: 600;
}

/* ─── TIMELINE TABLE ────────────────────────────────────────────────── */
.timeline { background: var(--cream-dark); }
.timeline-wrap {
  background: var(--paper);
  padding: 0.5rem;
  border: 3px solid var(--chocolate);
  box-shadow: 6px 6px 0 var(--carmine);
  overflow-x: auto;
}
.timeline-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
}
.timeline-table th {
  background: var(--chocolate);
  color: var(--cream);
  font-family: var(--display);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 1rem 1.2rem;
  text-align: left;
}
.timeline-table th.num { text-align: right; }
.timeline-table td {
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid var(--cream-dark);
  font-size: 0.95rem;
  vertical-align: middle;
}
.timeline-table td.num {
  font-family: var(--mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--carmine);
  font-weight: 600;
}
.timeline-table td.context {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-muted);
}
.timeline-table .year-cell {
  font-family: var(--display);
  color: var(--carmine);
  font-size: 1.1rem;
}
.timeline-table tr:last-child td {
  background: var(--gold);
  color: var(--chocolate);
  font-weight: 700;
}
.timeline-table tr:last-child td.num { color: var(--carmine-deep); }

/* ─── METHOD ───────────────────────────────────────────────────────── */
.method {
  background: var(--paper);
}
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.method-card {
  background: var(--cream);
  padding: 1.75rem 1.5rem;
  border-left: 6px solid var(--carmine);
  box-shadow: 3px 3px 0 var(--chocolate);
}
.method-card:nth-child(2) { border-left-color: var(--gold); }
.method-card:nth-child(3) { border-left-color: var(--sage); }
.method-card:nth-child(4) { border-left-color: var(--chocolate); }
.method-icon {
  width: 50px;
  height: 50px;
  color: var(--carmine);
  margin-bottom: 1rem;
}
.method-card:nth-child(2) .method-icon { color: var(--gold-deep); }
.method-card:nth-child(3) .method-icon { color: var(--sage); }
.method-card:nth-child(4) .method-icon { color: var(--chocolate); }
.method-card h3 {
  font-family: var(--display);
  font-size: 1.12rem;
  color: var(--chocolate);
  margin-bottom: 0.6rem;
}
.method-card p {
  font-family: var(--serif);
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink-muted);
}
.method-card code {
  font-family: var(--mono);
  background: rgba(200, 16, 46, 0.08);
  color: var(--carmine);
  padding: 1px 5px;
  border-radius: 2px;
  font-size: 0.88rem;
}

.method-disclosure {
  background: var(--cream);
  border-left: 4px solid var(--gold);
  padding: 1rem 1.5rem;
  margin-top: 1.5rem;
}
.method-disclosure summary {
  font-family: var(--display);
  cursor: pointer;
  color: var(--carmine);
  padding: 0.5rem 0;
  user-select: none;
  font-size: 1rem;
}
.method-disclosure summary:hover { color: var(--carmine-deep); }
.method-disclosure p {
  font-family: var(--serif);
  font-size: 0.96rem;
  line-height: 1.6;
  margin-top: 0.85rem;
  color: var(--ink);
}

/* ─── FOOTER ──────────────────────────────────────────────────────── */
.site-footer {
  background: var(--chocolate);
  color: var(--cream);
  padding: 3rem 0 2rem;
  border-top: 6px solid var(--gold);
  text-align: center;
}
.footer-bottle {
  display: block;
  width: 36px;
  height: 54px;
  margin: 0 auto 1rem;
  color: var(--gold);
  opacity: 0.9;
}
.footer-brand {
  font-family: var(--display);
  font-size: 1rem;
  letter-spacing: 0.22em;
  color: var(--gold);
  margin-bottom: 1rem;
}
.footer-text {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.92rem;
  max-width: 64ch;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
  color: rgba(249, 244, 236, 0.85);
}
.footer-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: rgba(249, 244, 236, 0.55);
}
.footer-meta a {
  color: var(--gold);
  text-decoration: none;
  margin: 0 0.3rem;
}
.footer-meta a:hover { color: var(--cream); }

/* ─── RESPONSIVE ─────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero-value { font-size: 2.75rem; }
  .hero-title { font-size: 1.6rem; }
  .hat-num { font-size: 2.2rem; }
  .section-title { font-size: 1.5rem; }
  .tier-number { font-size: 1.8rem; }
}