:root {
  --bg: #080c0a;
  --bg-card: #0f1613;
  --bg-card-hover: #141e1a;
  --fg: #e8efe9;
  --fg-muted: #8a9e8f;
  --accent: #00e676;
  --accent-dim: rgba(0, 230, 118, 0.15);
  --gold: #ffd54f;
  --gold-dim: rgba(255, 213, 79, 0.12);
  --border: rgba(255,255,255,0.06);
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
}

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================== HERO ===================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
  overflow: hidden;
  background: radial-gradient(ellipse 70% 50% at 50% 40%, rgba(0,230,118,0.06) 0%, transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 8px 20px;
  border-radius: 40px;
  margin-bottom: 40px;
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 5.5rem);
  letter-spacing: -2px;
  margin-bottom: 28px;
  background: linear-gradient(135deg, var(--fg) 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 580px;
  margin: 0 auto 48px;
  line-height: 1.75;
}

.hero-stat-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--gold);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 4px;
}

.hero-stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

.hero-gradient {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg), transparent);
  z-index: 1;
}

/* ===================== HOW ===================== */
.how {
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.how h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  margin-bottom: 64px;
  letter-spacing: -1px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: background 0.2s ease;
}

.step:hover {
  background: var(--bg-card-hover);
}

.step-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.step h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: var(--fg);
}

.step p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ===================== MATH ===================== */
.math {
  padding: 120px 0;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent 0%, rgba(0,230,118,0.02) 50%, transparent 100%);
}

.math-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: center;
}

.math-text h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.math-text p {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}

.math-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.math-card-inner {
  padding: 36px 32px;
}

.math-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
}

.math-label {
  font-size: 0.95rem;
  color: var(--fg-muted);
}

.math-value {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--fg);
}

.math-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

.math-row-prize {
  padding-top: 20px;
}

.math-value-big {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold);
}

/* ===================== VENUES ===================== */
.venues {
  padding: 120px 0;
  border-top: 1px solid var(--border);
}

.venues h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.venues-sub {
  text-align: center;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto 56px;
  font-size: 1.05rem;
  line-height: 1.7;
}

.venue-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.venue-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: border-color 0.2s ease;
}

.venue-card:hover {
  border-color: rgba(0,230,118,0.2);
}

.venue-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.venue-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--fg);
}

.venue-card p {
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ===================== FOOTER ===================== */
.site-footer {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg);
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.9rem;
  margin-top: 8px;
  font-style: italic;
}

.footer-meta {
  text-align: right;
}

.footer-meta p {
  color: var(--fg-muted);
  font-size: 0.88rem;
  line-height: 1.8;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .math-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .venue-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .hero-stat-row {
    gap: 20px;
  }
  
  .stat-num {
    font-size: 1.8rem;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 24px;
  }
  
  .footer-meta {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .venue-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 60px 20px;
    min-height: auto;
  }

  .how, .math, .venues {
    padding: 80px 0;
  }
}

/* ===================== INTEREST FORM ===================== */
.hero-cta {
  margin-top: 48px;
}

.interest-form {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.interest-form input[type="email"] {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 14px 20px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.98rem;
  width: 280px;
  outline: none;
  transition: border-color 0.2s;
}

.interest-form input[type="email"]::placeholder {
  color: var(--fg-muted);
}

.interest-form input[type="email"]:focus {
  border-color: var(--accent);
}

.interest-form button {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 14px 28px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s;
  white-space: nowrap;
}

.interest-form button:hover:not(:disabled) {
  opacity: 0.88;
}

.interest-form button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.interest-msg {
  margin-top: 16px;
  color: var(--accent);
  font-size: 0.95rem;
}

.interest-note {
  margin-top: 14px;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* ===================== PAYMENT SUCCESS ===================== */
.payment-success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  background: var(--bg);
}

.payment-success-card {
  background: var(--bg-card);
  border: 1px solid rgba(0,230,118,0.25);
  border-radius: var(--radius);
  padding: 64px 48px;
  text-align: center;
  max-width: 480px;
  width: 100%;
}

.payment-success-icon {
  font-size: 3.5rem;
  display: block;
  margin-bottom: 28px;
}

.payment-success-card h1 {
  font-size: 2rem;
  margin-bottom: 16px;
  color: var(--accent);
}

.payment-success-card p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 12px;
}

.payment-success-amount {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold);
  margin: 20px 0;
}

.payment-success-back {
  display: inline-block;
  margin-top: 28px;
  color: var(--accent);
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid rgba(0,230,118,0.3);
  padding: 10px 24px;
  border-radius: 8px;
  transition: background 0.2s;
}

.payment-success-back:hover {
  background: var(--accent-dim);
}