:root {
  --bg: #0a0a0f;
  --bg-secondary: #12121a;
  --fg: #e8e8ed;
  --fg-muted: #8a8a9a;
  --accent: #7c5cff;
  --accent-glow: rgba(124, 92, 255, 0.3);
  --accent-secondary: #c084fc;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-border: rgba(255, 255, 255, 0.06);
  --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);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: var(--accent);
  top: -100px;
  right: -100px;
  animation: float1 12s ease-in-out infinite;
}

.orb-2 {
  width: 350px;
  height: 350px;
  background: var(--accent-secondary);
  bottom: -50px;
  left: -50px;
  animation: float2 10s ease-in-out infinite;
}

.orb-3 {
  width: 200px;
  height: 200px;
  background: #4ecdc4;
  top: 40%;
  left: 30%;
  animation: float3 8s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-40px, 30px); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -40px); }
}

@keyframes float3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-20px, 20px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  text-align: center;
}

.hero-tag {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 28px;
  letter-spacing: -1px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-cta {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  padding: 16px 36px;
  border-radius: 12px;
  transition: all 0.2s;
  letter-spacing: -0.3px;
}

.btn-primary:hover {
  background: #6b4eee;
  transform: translateY(-2px);
  box-shadow: 0 12px 40px var(--accent-glow);
}

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

/* Concept */
.concept {
  padding: 140px 24px;
  background: var(--bg-secondary);
}

.concept-inner {
  max-width: 720px;
  margin: 0 auto;
}

.concept-label,
.how-label,
.surfaces-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.concept h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 32px;
  letter-spacing: -0.5px;
}

.concept-text {
  color: var(--fg-muted);
  font-size: 1.05rem;
  margin-bottom: 20px;
  line-height: 1.8;
}

/* How It Works */
.how {
  padding: 140px 24px;
}

.how-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.how-step {
  padding: 36px 28px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  transition: border-color 0.3s, transform 0.3s;
}

.how-step:hover {
  border-color: var(--accent-glow);
  transform: translateY(-4px);
}

.step-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 16px;
}

.how-step h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

/* Surfaces */
.surfaces {
  padding: 140px 24px;
  background: var(--bg-secondary);
}

.surfaces-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.surfaces h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  margin-bottom: 48px;
  letter-spacing: -0.5px;
}

.surface-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.surface-card {
  padding: 32px 24px;
  background: rgba(124, 92, 255, 0.04);
  border: 1px solid rgba(124, 92, 255, 0.1);
  border-radius: 14px;
  transition: background 0.3s, border-color 0.3s;
}

.surface-card:hover {
  background: rgba(124, 92, 255, 0.08);
  border-color: rgba(124, 92, 255, 0.25);
}

.surface-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
  color: var(--accent-secondary);
}

.surface-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.surface-card p {
  color: var(--fg-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* Closing */
.closing {
  position: relative;
  padding: 160px 24px;
  text-align: center;
  overflow: hidden;
}

.closing-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 28px;
  letter-spacing: -0.5px;
}

.closing-text {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.closing-vision {
  color: var(--fg);
  font-weight: 500;
  font-style: italic;
  margin-top: 28px;
}

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

.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg);
}

.footer-divider {
  width: 1px;
  height: 16px;
  background: var(--surface-border);
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    min-height: 85vh;
    padding: 60px 20px;
  }
  
  .concept,
  .how,
  .surfaces,
  .closing {
    padding: 80px 20px;
  }
  
  .how-grid,
  .surface-grid {
    grid-template-columns: 1fr;
  }
  
  .orb-1 {
    width: 300px;
    height: 300px;
  }
  
  .orb-2 {
    width: 200px;
    height: 200px;
  }
  
  .orb-3 {
    width: 120px;
    height: 120px;
  }
}