:root {
  --bg: #0d1117;
  --bg-alt: #161b22;
  --fg: #e6edf3;
  --fg-muted: #8b949e;
  --accent: #58d68d;
  --accent-glow: rgba(88, 214, 141, 0.15);
  --warm: #f0c674;
  --coral: #e06c75;
  --blue: #61afef;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width: 1120px;
}

* { 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: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* 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;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, rgba(88, 214, 141, 0.08) 0%, transparent 60%);
}

.hero-inner { max-width: 720px; position: relative; z-index: 2; }

.hero-badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(88, 214, 141, 0.25);
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -2px;
  margin-bottom: 28px;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-visual {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
}

.chalk-line {
  position: absolute;
  bottom: 40px;
  left: 10%;
  right: 10%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}

.chalk-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
}

.chalk-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.4;
}

.chalk-dots span:nth-child(3) { opacity: 0.8; }

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

.problem-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  align-items: center;
}

.problem-stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 7rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(180deg, var(--coral), var(--warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  font-size: 0.95rem;
  color: var(--fg-muted);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

.problem-text p {
  color: var(--fg-muted);
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.problem-highlight {
  color: var(--fg) !important;
  font-weight: 600;
  font-size: 1.2rem !important;
  border-left: 3px solid var(--coral);
  padding-left: 20px;
}

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

.features h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 56px;
  letter-spacing: -1px;
}

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

.feature-card {
  background: var(--bg-alt);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 36px;
  transition: border-color 0.3s;
}

.feature-card:hover {
  border-color: rgba(88, 214, 141, 0.3);
}

.feature-icon {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 1px;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card-1 .feature-icon { background: rgba(88, 214, 141, 0.15); color: var(--accent); }
.feature-card-2 .feature-icon { background: rgba(97, 175, 239, 0.15); color: var(--blue); }
.feature-card-3 .feature-icon { background: rgba(240, 198, 116, 0.15); color: var(--warm); }
.feature-card-4 .feature-icon { background: rgba(224, 108, 117, 0.15); color: var(--coral); }

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

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

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -1px;
}

.how-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.how-old, .how-new {
  border-radius: 16px;
  padding: 36px;
}

.how-old {
  background: rgba(224, 108, 117, 0.06);
  border: 1px solid rgba(224, 108, 117, 0.15);
}

.how-new {
  background: var(--accent-glow);
  border: 1px solid rgba(88, 214, 141, 0.25);
}

.how-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}

.how-old .how-label { color: var(--coral); }
.how-new .how-label { color: var(--accent); }

.how-old ul, .how-new ul { list-style: none; }

.how-old li, .how-new li {
  padding: 10px 0;
  font-size: 0.95rem;
  color: var(--fg-muted);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.how-old li:last-child, .how-new li:last-child { border-bottom: none; }

.how-new li { color: var(--fg); }

/* CLOSING */
.closing {
  padding: 120px 24px;
  text-align: center;
}

.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: -1.5px;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.1rem;
  margin-bottom: 20px;
  line-height: 1.7;
}

.closing-tagline {
  color: var(--accent) !important;
  font-weight: 600;
  font-size: 1.2rem !important;
  font-style: italic;
}

/* FOOTER */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

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

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

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

/* MOBILE */
@media (max-width: 768px) {
  .problem-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .problem-highlight {
    border-left: none;
    padding-left: 0;
    border-top: 3px solid var(--coral);
    padding-top: 16px;
  }

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

  .how-comparison {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .hero { min-height: 80vh; padding: 60px 20px 40px; }

  .hero h1 { letter-spacing: -1px; }
}