:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #161616;
  --bg-card-hover: #1c1c1c;
  --fg-primary: #f0f0f0;
  --fg-secondary: #8a8a8a;
  --fg-muted: #555555;
  --accent: #c0c0c0;
  --accent-bright: #e8e8e8;
  --border: #222222;
  --border-light: #2a2a2a;
  --gradient-start: #1a1a2e;
  --gradient-end: #0a0a0a;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html { scroll-behavior: smooth; }

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

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-bright);
  color: var(--bg-primary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: 12px;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
  letter-spacing: -0.2px;
}

.btn-primary:hover { background: var(--fg-primary); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.hero-actions {
  margin-bottom: 48px;
}

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--bg-primary);
  background: var(--accent-bright);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  letter-spacing: -0.5px;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  color: var(--fg-primary);
  letter-spacing: -0.3px;
}

.nav-tagline {
  font-size: 13px;
  color: var(--fg-secondary);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav-cta {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--bg-primary);
  background: var(--accent-bright);
  padding: 8px 18px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
}

.nav-cta:hover { background: var(--fg-primary); }

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse, rgba(192, 192, 192, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  border: 1px solid var(--border-light);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  color: var(--fg-primary);
  margin-bottom: 28px;
}

.hero-sub {
  font-size: 19px;
  line-height: 1.7;
  color: var(--fg-secondary);
  max-width: 640px;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--fg-primary);
  display: block;
}

.stat-label {
  font-size: 13px;
  color: var(--fg-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-light);
}

/* ===== PROBLEM ===== */
.problem {
  padding: 120px 24px;
  background: var(--bg-secondary);
}

.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  display: block;
  margin-bottom: 20px;
}

.problem-inner > h2,
.how-inner > h2,
.features-inner > h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -1px;
  color: var(--fg-primary);
  margin-bottom: 56px;
  max-width: 700px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  transition: background 0.3s, border-color 0.3s;
}

.problem-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
}

.problem-icon {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--fg-primary);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

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

/* ===== HOW ===== */
.how {
  padding: 120px 24px;
}

.how-inner {
  max-width: 900px;
  margin: 0 auto;
}

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

.step {
  display: flex;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.step:first-child {
  border-top: 1px solid var(--border);
}

.step-num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--border-light);
  line-height: 1;
  min-width: 80px;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--fg-primary);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.step-content p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg-secondary);
}

/* ===== FEATURES ===== */
.features {
  padding: 120px 24px;
  background: var(--bg-secondary);
}

.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: background 0.3s, border-color 0.3s;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
}

.feature-large {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--gradient-start) 100%);
  padding: 48px 36px;
}

.feature-tag {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--fg-primary);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.feature-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg-secondary);
  max-width: 560px;
}

/* ===== CLOSING ===== */
.closing {
  padding: 140px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.closing::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(192, 192, 192, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--fg-primary);
  margin-bottom: 20px;
}

.closing-sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--fg-secondary);
  margin-bottom: 48px;
}

.closing-cta-row {
  margin-bottom: 40px;
}

.closing-segments {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.segment {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-secondary);
  border: 1px solid var(--border-light);
  padding: 8px 20px;
  border-radius: 100px;
  transition: border-color 0.3s, color 0.3s;
}

.segment:hover {
  border-color: var(--accent);
  color: var(--fg-primary);
}

/* ===== FOOTER ===== */
.footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand .logo-mark {
  width: 28px;
  height: 28px;
  font-size: 14px;
}

.footer-brand .logo-text {
  font-size: 15px;
}

.footer-copy {
  font-size: 13px;
  color: var(--fg-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-tagline { display: none; }
  .nav-cta { display: none; }

  .hero { padding: 100px 20px 60px; min-height: auto; }
  .hero-stats { flex-direction: column; align-items: flex-start; gap: 20px; }
  .stat-divider { width: 40px; height: 1px; }

  .problem { padding: 80px 20px; }
  .problem-grid { grid-template-columns: 1fr; }

  .how { padding: 80px 20px; }
  .step { flex-direction: column; gap: 12px; }
  .step-num { font-size: 36px; min-width: auto; }

  .features { padding: 80px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-large { padding: 32px 24px; }

  .closing { padding: 100px 20px; }
  .closing-segments { gap: 8px; }

  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { letter-spacing: -1px; }
  .hero-sub { font-size: 16px; }
  .problem-card { padding: 28px 20px; }
  .feature-card { padding: 24px 20px; }
}