:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #1a1a25;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --accent: #6cff8c;
  --accent-dim: rgba(108, 255, 140, 0.12);
  --accent-glow: rgba(108, 255, 140, 0.25);
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1100px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* --- NAV --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--fg);
}

.nav-logo span {
  color: var(--accent);
}

.nav-tag {
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 500;
  letter-spacing: 0.3px;
}

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

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(120px);
  pointer-events: none;
  opacity: 0.4;
}

.hero-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -2px;
  max-width: 800px;
  margin-bottom: 28px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 19px;
  color: var(--fg-muted);
  max-width: 540px;
  line-height: 1.6;
}

/* --- PROBLEM --- */
.problem {
  padding: 100px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.problem-header {
  text-align: center;
  margin-bottom: 64px;
}

.problem-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.problem-header p {
  color: var(--fg-muted);
  font-size: 18px;
  max-width: 560px;
  margin: 0 auto;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.problem-card {
  background: var(--bg-elevated);
  padding: 40px 32px;
  border: 1px solid var(--border);
}

.problem-card:first-child { border-radius: 16px 0 0 16px; }
.problem-card:last-child { border-radius: 0 16px 16px 0; }

.problem-card .number {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 20px;
}

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

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

/* --- METHOD --- */
.method {
  padding: 100px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.method-header {
  text-align: center;
  margin-bottom: 72px;
}

.method-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.method-header p {
  color: var(--fg-muted);
  font-size: 18px;
  max-width: 580px;
  margin: 0 auto;
}

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

.steps::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  opacity: 0.2;
}

.step {
  display: flex;
  gap: 32px;
  padding: 36px 0;
  position: relative;
}

.step-num {
  flex-shrink: 0;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 2px solid rgba(108, 255, 140, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  position: relative;
  z-index: 1;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

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

/* --- QUOTE --- */
.quote-section {
  padding: 80px 24px;
  text-align: center;
  position: relative;
}

.quote-section::before {
  content: '';
  position: absolute;
  bottom: -100px;
  right: 10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(108, 255, 140, 0.08) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
}

.quote {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 600;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.35;
  letter-spacing: -0.5px;
}

.quote em {
  font-style: normal;
  color: var(--accent);
}

/* --- FOOTER --- */
.footer {
  padding: 48px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

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

.footer .logo-footer {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--fg);
  font-size: 18px;
  margin-bottom: 8px;
}

.footer .logo-footer span {
  color: var(--accent);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .problem-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .problem-card,
  .problem-card:first-child,
  .problem-card:last-child {
    border-radius: 12px;
  }
  .step { gap: 20px; }
  .steps::before { left: 20px; }
  .step-num { width: 42px; height: 42px; font-size: 16px; }
  .nav { padding: 16px 20px; }
  .hero { padding: 100px 20px 60px; }
}

@media (max-width: 480px) {
  body { font-size: 15px; }
  .hero-sub { font-size: 16px; }
  .problem-card { padding: 28px 24px; }
}