:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a26;
  --bg-accent: #141420;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --fg-dim: #555570;
  --accent: #00d4aa;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --accent-dark: #00a885;
  --warning: #ff6b35;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-dark);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ========== HERO ========== */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 120px 8% 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

.hero-badge {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 32px;
  padding: 8px 16px;
  border: 1px solid rgba(0, 212, 170, 0.25);
  border-radius: 4px;
  background: var(--accent-glow);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 28px;
}

.hero-sub {
  font-size: 19px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.65;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  background: var(--accent);
  color: #0a0a0f;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
  box-shadow: 0 4px 20px rgba(0, 212, 170, 0.25);
}

.btn-hero-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.btn-hero-secondary {
  font-size: 15px;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 14px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  transition: color 0.15s, border-color 0.15s;
}

.btn-hero-secondary:hover {
  color: var(--fg);
  border-color: var(--fg);
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: 24px;
}

.stat-ring {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  border: 3px solid var(--warning);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  color: var(--warning);
}

.stat-label {
  font-size: 15px;
  color: var(--fg-dim);
  line-height: 1.5;
}

/* ========== PROBLEM ========== */
.problem {
  padding: 100px 8%;
  background: var(--bg-accent);
}

.problem-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 40px 32px;
  transition: border-color 0.3s;
}

.problem-card:hover {
  border-color: rgba(255, 107, 53, 0.3);
}

.problem-icon {
  font-size: 32px;
  margin-bottom: 20px;
  color: var(--warning);
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--fg);
}

.problem-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ========== HOW IT WORKS ========== */
.how-it-works {
  padding: 100px 8%;
  max-width: var(--max-width);
  margin: 0 auto;
}

.how-it-works h2, .features h2, .numbers h2, .closing h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.section-sub {
  font-size: 17px;
  color: var(--fg-muted);
  margin-bottom: 56px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 32px 0;
}

.step-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.4;
  line-height: 1;
  flex-shrink: 0;
  width: 72px;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 520px;
}

.step-connector {
  width: 2px;
  height: 24px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  margin-left: 35px;
  opacity: 0.3;
}

/* ========== FEATURES ========== */
.features {
  padding: 100px 8%;
  background: var(--bg-accent);
}

.features h2, .features .section-sub {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 36px 32px;
  transition: border-color 0.3s, transform 0.3s;
}

.feature-card:hover {
  border-color: rgba(0, 212, 170, 0.2);
  transform: translateY(-2px);
}

.feature-highlight {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 212, 170, 0.05) 100%);
  border-color: rgba(0, 212, 170, 0.15);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--accent);
}

.feature-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ========== NUMBERS ========== */
.numbers {
  padding: 100px 8%;
  max-width: var(--max-width);
  margin: 0 auto;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.number-block {
  text-align: center;
}

.big-number {
  display: block;
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
}

.number-label {
  font-size: 14px;
  color: var(--fg-dim);
  line-height: 1.5;
}

/* ========== CLOSING ========== */
.closing {
  padding: 120px 8%;
  text-align: center;
  background: linear-gradient(to bottom, var(--bg-dark), var(--bg-accent));
}

.closing h2 {
  max-width: 700px;
  margin: 0 auto 24px;
  line-height: 1.2;
}

.closing-text {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 580px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.closing-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  background: var(--accent);
  color: #0a0a0f;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
  box-shadow: 0 4px 24px rgba(0, 212, 170, 0.3);
  margin-top: 8px;
}

.closing-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

/* ========== FOOTER ========== */
.site-footer {
  padding: 48px 8%;
  background: var(--bg-accent);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
}

.footer-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 13px;
  color: var(--fg-dim);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-link:hover {
  color: var(--fg-muted);
}

.footer-tagline {
  font-size: 14px;
  color: var(--fg-dim);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .hero {
    padding: 80px 6% 60px;
    min-height: 80vh;
  }

  .hero h1 {
    font-size: 36px;
    letter-spacing: -1px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .step {
    gap: 20px;
  }

  .step-num {
    font-size: 36px;
    width: 52px;
  }

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

  .feature-highlight {
    grid-column: 1;
  }

  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 24px;
  }

  .big-number {
    font-size: 32px;
  }

  .closing h2 {
    font-size: 28px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-nav {
    justify-content: center;
  }

  .hero-stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

/* ========== SITE NAV (all pages) ========== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(10, 10, 15, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0 8%;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 7px 14px;
  border-radius: 6px;
  transition: all 0.15s;
}

.nav-link:hover {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
  color: var(--accent);
}

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-display);
  color: #0a0a0f;
  background: var(--accent);
  text-decoration: none;
  padding: 8px 18px;
  border-radius: 6px;
  transition: background 0.15s;
  margin-left: 6px;
}

.nav-cta:hover {
  background: var(--accent-dark);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  border: none;
  background: transparent;
  flex-direction: column;
  gap: 4px;
  width: 36px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--fg-muted);
  border-radius: 2px;
  transition: all 0.2s;
}

.nav-toggle span:nth-child(1) { width: 20px; }
.nav-toggle span:nth-child(2) { width: 14px; }
.nav-toggle span:nth-child(3) { width: 20px; }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 8% 20px;
    gap: 4px;
  }

  .nav-links.open { display: flex; }

  .nav-link {
    padding: 12px 14px;
    border-radius: 8px;
  }

  .nav-cta {
    margin: 8px 0 0;
    text-align: center;
    display: block;
    padding: 12px 18px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 30px;
  }

  .numbers-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}