/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --fg: #e8e8ed;
  --fg-muted: #8a8a9a;
  --accent: #00e676;
  --accent-dim: rgba(0, 230, 118, 0.12);
  --accent-glow: rgba(0, 230, 118, 0.25);
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --max-w: 1120px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* === Nav === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 32px;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.5px;
}

/* === Hero === */
.hero {
  padding: 160px 32px 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
}

.hero-badge {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 8px 18px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 28px;
}

.hero-accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 20px;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -1px;
}

.stat-label {
  font-size: 14px;
  color: var(--fg-muted);
  margin-top: 4px;
}

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

/* === Proof / Problem Section === */
.proof {
  padding: 80px 32px;
}

.proof-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.proof-card {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 36px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.3s;
}

.proof-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.proof-card-highlight {
  background: var(--accent-dim);
  border-color: rgba(0, 230, 118, 0.2);
}

.proof-card-highlight:hover {
  border-color: rgba(0, 230, 118, 0.4);
}

.proof-icon {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  width: 48px;
}

.proof-text h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.proof-text p {
  color: var(--fg-muted);
  font-size: 16px;
  line-height: 1.6;
}

/* === How / Stack Section === */
.how {
  padding: 100px 32px;
}

.how-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: 56px;
}

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

.how-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: transform 0.2s, border-color 0.3s;
}

.how-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.12);
}

.how-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
}

.how-role {
  font-size: 14px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 500;
  margin-bottom: 16px;
}

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

/* === Niches === */
.niches {
  padding: 100px 32px;
  background: var(--bg-elevated);
}

.niches-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.niches-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

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

.niche-card:hover {
  border-color: rgba(0, 230, 118, 0.3);
}

.niche-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

.niche-card p {
  color: var(--fg-muted);
  font-size: 16px;
  line-height: 1.6;
}

/* === Closing === */
.closing {
  padding: 120px 32px;
  text-align: center;
}

.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
  margin-bottom: 56px;
}

.closing-model {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.model-item {
  text-align: center;
}

.model-label {
  font-size: 13px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 500;
  margin-bottom: 8px;
}

.model-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

.closing-tagline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.3px;
}

/* === Footer === */
.footer {
  padding: 48px 32px;
  border-top: 1px solid var(--border);
}

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

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--fg);
}

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

/* === Nav CTA === */
.nav-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-nav {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0, 230, 118, 0.25);
  padding: 9px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
}

.btn-nav:hover {
  background: rgba(0, 230, 118, 0.2);
  border-color: rgba(0, 230, 118, 0.5);
}

/* === Inquiry Form === */
.inquiry-form-wrap {
  margin-top: 72px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px;
  text-align: left;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.form-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 8px;
}

.form-sub {
  color: var(--fg-muted);
  font-size: 15px;
  margin-bottom: 28px;
}

.inquiry-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-optional {
  text-transform: none;
  font-weight: 400;
  letter-spacing: 0;
}

.form-field input,
.form-field textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  outline: none;
  transition: border-color 0.2s;
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--fg-muted);
  opacity: 0.6;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #000;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 28px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}

.btn-submit:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-arrow {
  font-size: 18px;
}

.form-msg {
  font-size: 15px;
  text-align: center;
  min-height: 20px;
}

.form-msg--success {
  color: var(--accent);
  font-weight: 600;
}

.form-msg--error {
  color: #ff5252;
}

/* === Responsive === */
@media (max-width: 768px) {
  .how-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-stats {
    gap: 24px;
  }

  .stat-divider {
    display: none;
  }

  .proof-card {
    flex-direction: column;
    gap: 16px;
  }

  .closing-model {
    gap: 32px;
  }

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

  .hero {
    padding: 120px 20px 60px;
  }

  .proof, .how, .niches, .closing {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .inquiry-form-wrap {
    padding: 32px 24px;
    margin-top: 48px;
  }

  .form-actions {
    justify-content: stretch;
  }

  .btn-submit {
    width: 100%;
    justify-content: center;
  }
}