:root {
  --bg: #07060b;
  --bg-subtle: #0d0b14;
  --fg: #e8e4f0;
  --fg-muted: #8b83a0;
  --accent: #a78bfa;
  --accent-bright: #c4b5fd;
  --cyan: #22d3ee;
  --gold: #fbbf24;
  --gradient-1: linear-gradient(135deg, #a78bfa 0%, #22d3ee 50%, #c084fc 100%);
  --gradient-2: linear-gradient(135deg, #c084fc 0%, #22d3ee 100%);
  --card-bg: #0f0d18;
  --card-border: #1a1726;
  --radius: 24px;
  --font-display: 'Syne', 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-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
}

.gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}

.orb-1 {
  width: 600px; height: 600px;
  background: #7c3aed;
  top: -200px; left: -100px;
  animation: float1 20s ease-in-out infinite;
}

.orb-2 {
  width: 400px; height: 400px;
  background: #22d3ee;
  bottom: -100px; right: -50px;
  animation: float2 25s ease-in-out infinite;
}

.orb-3 {
  width: 300px; height: 300px;
  background: #c084fc;
  top: 40%; left: 60%;
  animation: float3 18s ease-in-out infinite;
}

.helix-line {
  position: absolute;
  width: 2px;
  height: 100%;
  opacity: 0.06;
}

.helix-1 {
  left: 30%;
  background: linear-gradient(180deg, transparent, var(--accent), transparent);
}

.helix-2 {
  right: 30%;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(80px, 40px) scale(1.1); }
  66% { transform: translate(-40px, 80px) scale(0.95); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-60px, -30px) scale(1.05); }
  66% { transform: translate(30px, -60px) scale(0.9); }
}

@keyframes float3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-50px, 30px); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.hero-tag {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

.hero-visual {
  position: relative;
  z-index: 1;
  margin-top: 64px;
}

.helix-container {
  position: relative;
  width: 120px;
  height: 200px;
  margin: 0 auto;
}

.helix-strand {
  position: absolute;
  width: 80px;
  height: 200px;
  border: 2px solid;
  border-radius: 50%;
  animation: helixSpin 6s linear infinite;
}

.strand-left {
  left: 0;
  border-color: var(--accent);
  opacity: 0.5;
}

.strand-right {
  right: 0;
  border-color: var(--cyan);
  opacity: 0.5;
  animation-delay: -3s;
}

.helix-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  background: var(--gradient-1);
  border-radius: 50%;
  filter: blur(20px);
  opacity: 0.8;
}

@keyframes helixSpin {
  0% { transform: rotateY(0deg); }
  100% { transform: rotateY(360deg); }
}

/* ====== HERO CTA ====== */
.hero-cta {
  margin-top: 40px;
}

.hero-btn-primary {
  display: inline-block;
  background: var(--gradient-1);
  border-radius: 14px;
  padding: 16px 32px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 4px 32px rgba(167, 139, 250, 0.25);
}

.hero-btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(167, 139, 250, 0.35);
}

.closing-cta {
  margin-top: 40px;
}

/* ====== WHAT (PROBLEM) ====== */
.what {
  padding: 120px 24px;
  background: var(--bg-subtle);
}

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

.what-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 24px;
}

.what h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.what-body {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.9;
}

.what-body em {
  color: var(--accent-bright);
  font-style: normal;
  font-weight: 500;
}

.what-divider {
  width: 60px;
  height: 2px;
  background: var(--gradient-2);
  margin: 48px 0;
  border-radius: 2px;
}

.what-answer {
  font-size: 1.1rem;
  color: var(--fg);
  line-height: 1.9;
}

/* ====== MODULES ====== */
.modules {
  padding: 120px 24px;
}

.modules-header {
  max-width: 720px;
  margin: 0 auto 64px;
}

.modules-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 24px;
}

.modules-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.module-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.module-card:hover {
  border-color: #2a2440;
  transform: translateY(-4px);
}

.card-large {
  grid-column: span 2;
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 20px;
  display: inline-block;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.module-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

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

/* ====== HOW ====== */
.how {
  padding: 120px 24px;
  background: var(--bg-subtle);
}

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

.how-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 48px;
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

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

.step-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  flex-shrink: 0;
  width: 80px;
}

.step-content h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 1rem;
  color: var(--fg-muted);
  line-height: 1.8;
}

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

.closing-inner {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.closing-orb {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, #7c3aed33, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
  animation: float1 20s ease-in-out infinite;
}

.closing h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

.closing-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.9;
  max-width: 600px;
  margin: 0 auto;
}

/* ====== FOOTER ====== */
.site-footer {
  padding: 60px 24px;
  text-align: center;
  border-top: 1px solid var(--card-border);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
  .hero { padding: 100px 20px 60px; min-height: 90vh; }
  .hero h1 { font-size: 2.4rem; }
  .hero-sub { font-size: 1rem; }

  .what, .modules, .how, .closing { padding: 80px 20px; }

  .card-large { grid-column: span 1; }

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

  .step { flex-direction: column; gap: 12px; }
  .step-num { font-size: 2rem; width: auto; }

  .closing h2 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .module-card { padding: 28px 24px; }
}