:root {
  --bg: #0a0a0f;
  --bg-subtle: #12121a;
  --fg: #f0efe9;
  --fg-muted: #8a8a96;
  --accent: #6c5ce7;
  --accent-glow: rgba(108, 92, 231, 0.25);
  --accent-2: #00cec9;
  --surface: #1a1a26;
  --surface-border: rgba(255,255,255,0.06);
  --radius: 16px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'Plus Jakarta 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;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ========== HERO ========== */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 24px 60px;
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, var(--accent-glow) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 80%, rgba(0, 206, 201, 0.08) 0%, transparent 60%);
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 40px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 8vw, 6.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lede {
  max-width: 560px;
  font-size: 1.15rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.pill {
  padding: 10px 22px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
  transition: border-color 0.2s;
}

.pill:hover {
  border-color: var(--accent);
}

/* ========== PROBLEM ========== */
.problem {
  padding: 100px 24px;
  background: var(--bg-subtle);
}

.problem-inner {
  max-width: 960px;
  margin: 0 auto;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 56px;
  letter-spacing: -0.02em;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px;
}

.problem-card {
  padding: 28px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  text-align: center;
  transition: transform 0.2s;
}

.problem-card.dead {
  opacity: 0.5;
}

.problem-card.dead:hover {
  opacity: 0.7;
  transform: translateY(-2px);
}

.problem-card.alive {
  opacity: 1;
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(108,92,231,0.1), rgba(0,206,201,0.05));
  box-shadow: 0 0 40px var(--accent-glow);
}

.problem-icon {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg-muted);
  margin-bottom: 12px;
  text-decoration: line-through;
  text-decoration-color: rgba(255,255,255,0.2);
}

.problem-icon-uni {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin: 0 auto 12px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

.problem-card.alive p {
  color: var(--fg);
  font-weight: 500;
}

/* ========== FEATURES ========== */
.features {
  padding: 100px 24px;
}

.features-inner {
  max-width: 780px;
  margin: 0 auto;
}

.feature-block {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding: 48px 0;
  border-bottom: 1px solid var(--surface-border);
}

.feature-block:last-child {
  border-bottom: none;
}

.feature-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--surface);
  min-width: 80px;
  line-height: 1;
  -webkit-text-stroke: 1px rgba(108,92,231,0.3);
}

.feature-content h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-content p {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ========== HOW ========== */
.how {
  padding: 100px 24px;
  background: var(--bg-subtle);
}

.how-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.how-grid {
  display: flex;
  gap: 24px;
  justify-content: center;
}

.how-card {
  flex: 1;
  max-width: 180px;
  padding: 32px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--surface-border);
}

.how-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.how-card p {
  font-size: 0.95rem;
  color: var(--fg);
  font-weight: 500;
}

/* ========== CLOSING ========== */
.closing {
  padding: 120px 24px;
  text-align: center;
  position: relative;
  background:
    radial-gradient(ellipse 50% 50% at 50% 100%, var(--accent-glow) 0%, transparent 70%);
}

.closing-inner {
  max-width: 640px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ========== FOOTER ========== */
.site-footer {
  padding: 48px 24px;
  border-top: 1px solid var(--surface-border);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-links {
  display: flex;
  gap: 24px;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

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

/* ========== MOBILE ========== */
@media (max-width: 640px) {
  .hero {
    min-height: 80vh;
    padding: 60px 20px 40px;
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .lede {
    font-size: 1rem;
  }

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

  .feature-block {
    flex-direction: column;
    gap: 12px;
    padding: 32px 0;
  }

  .feature-number {
    font-size: 2rem;
    min-width: auto;
  }

  .how-grid {
    flex-direction: column;
    align-items: center;
  }

  .how-card {
    max-width: 100%;
    width: 100%;
  }

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

  .footer-links {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 400px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }
}