/* main.css - Cloud Carbon Dating Design System */

/* ──────────────────────────────────────────────
   Fonts & Reset
────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

/* ──────────────────────────────────────────────
   Design Tokens
────────────────────────────────────────────── */
:root {
  --bg-deep:     #060d0a;
  --bg-base:     #0a1410;
  --bg-surface:  #0f1f18;
  --bg-card:     #111e19;
  --bg-card2:    #162620;
  --bg-glass:    rgba(15, 31, 24, 0.6);

  --green-400:   #34d399;
  --green-500:   #10b981;
  --green:       #00ff88;
  --green-glow:  rgba(0, 255, 136, 0.15);
  --green-dark:  #003d20;

  --amber:       #f59e0b;
  --amber-light: #fbbf24;
  --amber-glow:  rgba(245, 158, 11, 0.15);

  --red:         #ef4444;
  --red-glow:    rgba(239, 68, 68, 0.15);
  --orange:      #f97316;

  --blue:        #3b82f6;
  --purple:      #a855f7;

  --text-primary:   #e8f5f0;
  --text-secondary: #9db8ac;
  --text-muted:     #516b5e;
  --text-faint:     #2e4a3e;

  --border:      rgba(0, 255, 136, 0.08);
  --border-md:   rgba(0, 255, 136, 0.15);
  --border-bright: rgba(0, 255, 136, 0.35);

  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255,255,255,0.04) inset;
  --shadow-glow: 0 0 40px rgba(0, 255, 136, 0.12);

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ──────────────────────────────────────────────
   Scroll Animations
────────────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* ──────────────────────────────────────────────
   Navigation
────────────────────────────────────────────── */
#main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2rem;
  transition: var(--transition-slow);
}

#main-nav.nav-scrolled {
  background: rgba(6, 13, 10, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 2rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}
.nav-logo-icon { font-size: 1.4rem; }
.nav-logo-accent { color: var(--green); }

.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--green); }

.nav-cta {
  background: var(--green);
  color: var(--bg-deep);
  padding: 0.5rem 1.2rem;
  border-radius: 40px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover { background: var(--green-400); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,255,136,0.3); }

#menu-btn { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }
#mobile-menu { display: none; }

/* ──────────────────────────────────────────────
   HERO SECTION
────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 0 2rem;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 70% at 30% 40%, rgba(0,255,136,0.07) 0%, transparent 70%),
              radial-gradient(ellipse 40% 50% at 80% 60%, rgba(245,158,11,0.05) 0%, transparent 60%),
              radial-gradient(ellipse 80% 80% at 50% 100%, rgba(0,0,0,0.6) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 6rem 0 4rem;
}

.hero-text { max-width: 600px; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--border-md);
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.4rem 1rem;
  border-radius: 40px;
  margin-bottom: 1.5rem;
}
.eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  animation: pulse-dot 2s infinite;
}

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

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.hero-title-accent { color: var(--green); }
.hero-title-sub { color: var(--amber); }

.hero-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--green), #00cc6a);
  color: var(--bg-deep);
  padding: 0.85rem 2rem;
  border-radius: 40px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 6px 24px rgba(0,255,136,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(0,255,136,0.4); }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  padding: 0.85rem 2rem;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--border-md);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-secondary:hover { border-color: var(--green); color: var(--green); background: var(--green-glow); }

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.hero-stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--green);
  display: block;
}
.hero-stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* Hero Right Panel */
.hero-right { position: relative; }

.hero-live-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-md);
  border-radius: var(--radius-xl);
  padding: 1.8rem;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}
.hero-live-card::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px; right: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), var(--amber), transparent);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.live-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.4rem;
}
.live-title { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); letter-spacing: 0.1em; text-transform: uppercase; }
.live-dot {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--green);
}
.live-dot-anim {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  animation: live-pulse 1.5s infinite;
}
@keyframes live-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0,255,136,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(0,255,136,0); }
}

.live-intensity-display {
  text-align: center;
  padding: 1.2rem 0;
}
.live-intensity-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  letter-spacing: -0.03em;
}
.live-unit { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.3rem; }

.intensity-meta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 0.8rem;
}

.intensity-trend {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
}
.intensity-trend.trend-up { color: var(--red); background: var(--red-glow); }
.intensity-trend.trend-down { color: var(--green); background: var(--green-glow); }

.intensity-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
}
.intensity-badge.green { background: rgba(0,255,136,0.15); color: var(--green); border: 1px solid rgba(0,255,136,0.3); }
.intensity-badge.yellow-green { background: rgba(134,239,172,0.15); color: #86efac; border: 1px solid rgba(134,239,172,0.3); }
.intensity-badge.yellow { background: rgba(245,158,11,0.15); color: var(--amber); border: 1px solid rgba(245,158,11,0.3); }
.intensity-badge.orange { background: rgba(249,115,22,0.15); color: var(--orange); border: 1px solid rgba(249,115,22,0.3); }
.intensity-badge.red { background: rgba(239,68,68,0.15); color: var(--red); border: 1px solid rgba(239,68,68,0.3); }

/* API Ticker */
.api-ticker-wrap {
  margin-top: 1rem;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  overflow: hidden;
}
.ticker-label { font-size: 0.7rem; color: var(--text-muted); margin-bottom: 0.3rem; letter-spacing: 0.08em; text-transform: uppercase; }
#api-ticker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
}
.ticker-icon { font-size: 1rem; }
.ticker-api { color: var(--text-secondary); }
.ticker-arrow { color: var(--text-faint); }
.ticker-value { color: var(--green); font-weight: 600; }

@keyframes ticker-flash-anim {
  0% { opacity: 0; transform: translateX(-6px); }
  100% { opacity: 1; transform: translateX(0); }
}
#api-ticker.ticker-flash { animation: ticker-flash-anim 0.3s ease forwards; }

/* Pulse dot */
.pulse-dot {
  width: 10px; height: 10px; border-radius: 50%;
  display: inline-block;
}
.pulse-dot.green { background: var(--green); box-shadow: 0 0 10px var(--green); animation: live-pulse 1.5s infinite; }
.pulse-dot.yellow { background: var(--amber); animation: live-pulse 1.5s infinite; }
.pulse-dot.red { background: var(--red); animation: live-pulse 1.5s infinite; }

/* ──────────────────────────────────────────────
   Section Helpers
────────────────────────────────────────────── */
section { padding: 6rem 2rem; }
.section-inner { max-width: 1280px; margin: 0 auto; }

.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--green-glow);
  border: 1px solid var(--border-md);
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 40px;
  margin-bottom: 1rem;
}
.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.8rem;
}
.section-subtitle { color: var(--text-secondary); font-size: 1rem; max-width: 560px; margin: 0 auto; line-height: 1.6; }

/* Cards */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.glass-card:hover {
  border-color: var(--border-md);
  box-shadow: var(--shadow-card), 0 0 30px rgba(0,255,136,0.06);
}

/* ──────────────────────────────────────────────
   DASHBOARD SECTION
────────────────────────────────────────────── */
#dashboard { background: var(--bg-base); }

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1.5rem;
}

/* Guilt Meter Card */
.guilt-card {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  padding: 1.8rem;
}
.guilt-score-display {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: 1rem 0;
}
.guilt-score-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--red);
}
.guilt-score-max { font-size: 1.2rem; color: var(--text-muted); }

.guilt-meter-bg {
  height: 10px;
  background: rgba(255,255,255,0.07);
  border-radius: 10px;
  overflow: hidden;
  margin: 0.8rem 0;
}
.guilt-meter-fill {
  height: 100%;
  border-radius: 10px;
  transition: width 0.8s ease, background 0.5s;
}
.guilt-meter-fill.green { background: linear-gradient(90deg, var(--green-dark), var(--green)); }
.guilt-meter-fill.yellow { background: linear-gradient(90deg, #713f12, var(--amber)); }
.guilt-meter-fill.orange { background: linear-gradient(90deg, #7c2d12, var(--orange)); }
.guilt-meter-fill.red { background: linear-gradient(90deg, #450a0a, var(--red)); }

#guilt-label { font-size: 0.88rem; font-weight: 600; color: var(--text-secondary); margin-top: 0.4rem; }
.guilt-desc { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.6rem; line-height: 1.4; }

/* Intensity card spans middle */
.intensity-card {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  padding: 1.8rem;
  text-align: center;
}
.big-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: -0.03em;
  line-height: 1;
}
.big-unit { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.3rem; }

/* Monthly CO2 card */
.monthly-card {
  grid-column: 3 / 4;
  grid-row: 1 / 2;
  padding: 1.8rem;
}
.monthly-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -0.02em;
}
.monthly-unit { font-size: 0.85rem; color: var(--text-muted); }

/* Relatable metrics span full width */
.relatable-card {
  grid-column: 1 / -1;
  grid-row: 2 / 3;
  padding: 1.8rem;
}
.relatable-primary-display { text-align: center; margin-bottom: 1.5rem; }
#relatable-primary {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
}
.relatable-number { color: var(--green); }

.relatable-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.relatable-mini-card {
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  transition: var(--transition);
}
.relatable-mini-card:hover { border-color: var(--border-md); }
.rel-icon { font-size: 1.5rem; margin-bottom: 0.4rem; }
.rel-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
}
.rel-label { font-size: 0.72rem; color: var(--text-muted); }

/* Charts grid */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.chart-card { padding: 1.5rem; }
.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
}
.chart-title { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); letter-spacing: 0.08em; text-transform: uppercase; }
.chart-canvas-wrap { height: 220px; position: relative; }

/* ──────────────────────────────────────────────
   PROVIDER TABS
────────────────────────────────────────────── */
#providers { background: var(--bg-surface); }

.provider-tabs {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}
.provider-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.7rem 1.5rem;
  border-radius: 40px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}
.provider-tab:hover { border-color: var(--border-md); color: var(--text-primary); }
.provider-tab.active {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-glow);
  box-shadow: 0 0 20px rgba(0,255,136,0.1);
}
.provider-logo { font-size: 1.1rem; }

.greenest-regions-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.5rem;
}
.greenest-title { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 1rem; }

.region-item {
  display: grid;
  grid-template-columns: 2rem 1fr auto 120px;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
}
.region-item:last-child { border-bottom: none; }
.region-item.top-region .region-name { color: var(--green); }
.region-rank { font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--text-muted); font-weight: 600; }
.region-name { font-size: 0.88rem; font-weight: 500; }
.region-intensity {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
}
.region-intensity.green { color: var(--green); }
.region-intensity.yellow-green { color: #86efac; }
.region-intensity.yellow { color: var(--amber); }
.region-intensity.orange { color: var(--orange); }
.region-intensity.red { color: var(--red); }

.region-bar-bg { height: 4px; background: rgba(255,255,255,0.05); border-radius: 4px; overflow: hidden; }
.region-bar { height: 100%; border-radius: 4px; transition: width 0.8s ease; }
.region-bar.green { background: var(--green); }
.region-bar.yellow-green { background: #86efac; }
.region-bar.yellow { background: var(--amber); }
.region-bar.orange { background: var(--orange); }
.region-bar.red { background: var(--red); }

/* Region heatmap */
.region-map-section { margin-top: 2rem; }
.map-title { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 1rem; }
#region-map-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
  gap: 0.5rem;
}
.map-region-tile {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.5rem;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-height: 60px;
  justify-content: flex-end;
}
.map-region-tile:hover { border-color: var(--border-bright); transform: scale(1.03); z-index: 2; }
.map-region-tile.selected-tile { border-color: var(--green) !important; box-shadow: 0 0 16px rgba(0,255,136,0.2); }

.tile-country { font-size: 0.65rem; font-weight: 700; color: var(--text-muted); position: relative; z-index: 1; }
.tile-intensity { font-family: 'JetBrains Mono', monospace; font-size: 0.62rem; font-weight: 600; position: relative; z-index: 1; }
.map-region-tile.green .tile-intensity { color: var(--green); }
.map-region-tile.yellow-green .tile-intensity { color: #86efac; }
.map-region-tile.yellow .tile-intensity { color: var(--amber); }
.map-region-tile.orange .tile-intensity { color: var(--orange); }
.map-region-tile.red .tile-intensity { color: var(--red); }

.tile-bar {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  opacity: 0.18;
  transition: height 0.5s ease;
}
.map-region-tile.green .tile-bar { background: var(--green); }
.map-region-tile.yellow-green .tile-bar { background: #86efac; }
.map-region-tile.yellow .tile-bar { background: var(--amber); }
.map-region-tile.orange .tile-bar { background: var(--orange); }
.map-region-tile.red .tile-bar { background: var(--red); }

/* ──────────────────────────────────────────────
   CARBON CALCULATOR
────────────────────────────────────────────── */
#calculator { background: var(--bg-base); }

.calc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.form-card { padding: 2rem; }
.form-group { margin-bottom: 1.5rem; }
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.form-input, .form-select {
  width: 100%;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  font-size: 0.92rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: var(--transition);
  appearance: none;
}
.form-input:focus, .form-select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(0,255,136,0.1);
}
.form-select { cursor: pointer; }
.form-select option, .form-select optgroup { background: #0f1f18; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.btn-calculate {
  width: 100%;
  padding: 0.9rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--green), #00cc6a);
  color: var(--bg-deep);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 20px rgba(0,255,136,0.3);
}
.btn-calculate:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,255,136,0.4); }

/* Result panel */
#calc-result-panel { padding: 2rem; }
#calc-result-panel.hidden { display: none; }

.result-header { margin-bottom: 1.5rem; }
.result-title { font-family: 'Space Grotesk', sans-serif; font-size: 1rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 0.5rem; }
.result-co2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: -0.02em;
}

.result-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 1.2rem 0;
}
.result-meta-item {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem;
}
.result-meta-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.2rem; }
.result-meta-value { font-family: 'JetBrains Mono', monospace; font-size: 0.88rem; font-weight: 600; color: var(--text-primary); }

.result-relatable {
  background: rgba(0,255,136,0.06);
  border: 1px solid rgba(0,255,136,0.15);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 1rem 0;
}
.result-relatable strong { color: var(--green); }

#relatable-mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 1rem;
}
.mini-comparison-card {
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.5rem;
  text-align: center;
}
.mini-icon { font-size: 1.2rem; display: block; margin-bottom: 0.2rem; }
.mini-value { font-family: 'Space Grotesk', monospace; font-size: 0.9rem; font-weight: 700; color: var(--text-primary); display: block; }
.mini-label { font-size: 0.65rem; color: var(--text-muted); }

/* ──────────────────────────────────────────────
   OPTIMIZER SECTION
────────────────────────────────────────────── */
#optimizer { background: var(--bg-surface); }

#optimizer-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.optimizer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.optimizer-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: 3px 0 0 3px;
}
.optimizer-card.priority-high::before { background: var(--green); }
.optimizer-card.priority-medium::before { background: var(--amber); }
.optimizer-card.priority-low::before { background: var(--blue); }
.optimizer-card:hover { border-color: var(--border-md); box-shadow: var(--shadow-glow); }

.opt-header { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.7rem; }
.opt-icon { font-size: 1.2rem; }
.opt-title { font-weight: 700; font-size: 0.95rem; flex: 1; }
.opt-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
}
.opt-badge.priority-high { background: rgba(0,255,136,0.12); color: var(--green); border: 1px solid rgba(0,255,136,0.25); }
.opt-badge.priority-medium { background: rgba(245,158,11,0.12); color: var(--amber); border: 1px solid rgba(245,158,11,0.25); }
.opt-badge.priority-low { background: rgba(59,130,246,0.12); color: var(--blue); border: 1px solid rgba(59,130,246,0.25); }

.opt-description { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 1rem; }
.opt-footer { display: flex; flex-direction: column; gap: 0.5rem; }
.opt-savings { font-size: 0.82rem; font-weight: 600; color: var(--green-400); }
.opt-bar-bg { height: 4px; background: rgba(255,255,255,0.06); border-radius: 4px; overflow: hidden; }
.opt-bar { height: 100%; background: linear-gradient(90deg, var(--green-dark), var(--green)); border-radius: 4px; transition: width 1s ease; }

/* ──────────────────────────────────────────────
   HOW IT WORKS
────────────────────────────────────────────── */
#how-it-works { background: var(--bg-base); }
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.how-card {
  padding: 2rem;
  text-align: center;
}
.how-number {
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 2px solid var(--green);
  color: var(--green);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
}
.how-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.how-title { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.1rem; margin-bottom: 0.6rem; }
.how-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* ──────────────────────────────────────────────
   PROVIDER COMPARISON TABLE
────────────────────────────────────────────── */
#compare { background: var(--bg-surface); }

.compare-chart-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

/* ──────────────────────────────────────────────
   FOOTER
────────────────────────────────────────────── */
footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.footer-logo { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1rem; }
.footer-logo-accent { color: var(--green); }
.footer-links { display: flex; gap: 1.5rem; list-style: none; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.85rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--green); }
.footer-copy { font-size: 0.8rem; color: var(--text-muted); text-align: center; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); text-align: center; }

/* ──────────────────────────────────────────────
   Provider Chart Section
────────────────────────────────────────────── */
.compare-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.compare-chart-canvas { height: 280px; }

.compare-legend {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 0;
}
.legend-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.legend-dot {
  width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; margin-top: 3px;
}
.legend-name { font-weight: 700; font-size: 0.9rem; margin-bottom: 0.2rem; }
.legend-detail { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

/* ──────────────────────────────────────────────
   RESPONSIVE
────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; padding-top: 8rem; }
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
  .guilt-card { grid-column: 1 / 2; }
  .intensity-card { grid-column: 2 / 3; }
  .monthly-card { grid-column: 1 / -1; }
  .relatable-card { grid-column: 1 / -1; }
  .relatable-grid { grid-template-columns: repeat(2, 1fr); }
  .charts-grid { grid-template-columns: 1fr; }
  .calc-layout { grid-template-columns: 1fr; }
  .compare-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  section { padding: 4rem 1.2rem; }
  .nav-links { display: none; }
  #menu-btn { display: block; }
  #mobile-menu.open { display: flex; flex-direction: column; gap: 1rem; padding: 1.5rem; background: var(--bg-surface); border-top: 1px solid var(--border); position: fixed; top: 56px; left: 0; right: 0; z-index: 99; }
  #mobile-menu.open a { color: var(--text-secondary); text-decoration: none; padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
  .hero-stats { flex-wrap: wrap; gap: 1.2rem; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .guilt-card, .intensity-card, .monthly-card, .relatable-card { grid-column: 1; }
  .how-grid { grid-template-columns: 1fr; }
  #optimizer-cards { grid-template-columns: 1fr; }
  .relatable-grid { grid-template-columns: repeat(2, 1fr); }
  #region-map-grid { grid-template-columns: repeat(auto-fill, minmax(55px, 1fr)); }
  .form-row { grid-template-columns: 1fr; }
  .hero-title { font-size: 2rem; }
  .nav-cta { display: none; }
}

/* Cart Item List Styles */
.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.75rem;
  transition: all 0.2s ease;
}
.cart-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}
.cart-item-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.cart-item-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
}
.cart-item-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.cart-item-cost {
  text-align: right;
}
.cart-item-co2 {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--text-primary);
}
.cart-item-remove {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  margin-left: 1rem;
  transition: color 0.2s;
}
.cart-item-remove:hover {
  color: var(--red);
}

/* Modal Styles */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.modal-backdrop {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal-content {
  position: relative;
  width: 90%;
  max-width: 450px;
  z-index: 10000;
  padding: 2rem;
  transform: translateY(0);
  transition: transform 0.3s ease;
}
.modal.hidden .modal-content {
  transform: translateY(20px);
}