:root {
  --bg: #fafaf9;
  --bg-dark: #1a1a2e;
  --fg: #1a1a2e;
  --fg-light: #6b6b7b;
  --accent: #f59e0b;
  --accent-dim: rgba(245, 158, 11, 0.12);
  --surface: #ffffff;
  --border: rgba(26, 26, 46, 0.08);
  --radius: 4px;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav { padding: 20px 40px; border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { font-family: var(--font-display); font-weight: 800; font-size: 1.25rem; color: var(--fg); text-decoration: none; letter-spacing: -0.02em; }
.nav-tagline { font-size: 0.8rem; color: var(--fg-light); font-family: var(--font-body); letter-spacing: 0.04em; text-transform: uppercase; }
.nav-actions { display: flex; align-items: center; gap: 20px; }
.nav-link { font-size: 0.875rem; color: var(--fg-light); text-decoration: none; font-weight: 400; transition: color 0.15s; }
.nav-link:hover { color: var(--fg); }
.nav-btn { font-size: 0.8rem; font-weight: 500; background: var(--accent); color: #fff; padding: 7px 16px; border-radius: var(--radius); text-decoration: none; transition: opacity 0.15s; display: inline-block; }
.nav-btn:hover { opacity: 0.85; color: #fff; }

/* HERO */
.hero { padding: 100px 40px 80px; position: relative; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 60% at 70% 50%, rgba(245,158,11,0.06) 0%, transparent 70%); pointer-events: none; }
.hero-content { max-width: 1100px; margin: 0 auto; position: relative; }
.hero-label { font-family: var(--font-body); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.hero-headline {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: 28px;
}
.hero-sub { font-size: 1.15rem; color: var(--fg-light); max-width: 580px; line-height: 1.7; margin-bottom: 48px; font-weight: 300; }
.hero-stat-row { display: flex; gap: 48px; flex-wrap: wrap; }
.hero-stat { display: flex; flex-direction: column; gap: 4px; }
.hero-stat-num { font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; color: var(--accent); letter-spacing: -0.02em; }
.hero-stat-label { font-size: 0.8rem; color: var(--fg-light); max-width: 110px; line-height: 1.4; }

/* SECTION LABELS */
.section-label { font-family: var(--font-body); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 16px; }

/* HOW */
.how { padding: 80px 40px; background: var(--bg-dark); color: #fff; }
.how-inner { max-width: 1100px; margin: 0 auto; }
.how-header { margin-bottom: 60px; }
.how-title { font-family: var(--font-display); font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1.15; max-width: 560px; }
.how-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px; }
.how-card { background: rgba(255,255,255,0.04); padding: 40px; border: 1px solid rgba(255,255,255,0.06); }
.how-num { font-family: var(--font-display); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 16px; }
.how-card h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; margin-bottom: 12px; letter-spacing: -0.01em; }
.how-card p { font-size: 0.9rem; color: rgba(255,255,255,0.55); line-height: 1.7; font-weight: 300; }

/* FEATURES */
.features { padding: 80px 40px; }
.features-inner { max-width: 1100px; margin: 0 auto; }
.features-title { font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 700; letter-spacing: -0.03em; max-width: 600px; margin-bottom: 60px; line-height: 1.15; }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.feature-item { }
.feature-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: var(--accent-dim); color: var(--accent); border-radius: var(--radius); margin-bottom: 16px; }
.feature-item h3 { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.01em; }
.feature-item p { font-size: 0.85rem; color: var(--fg-light); line-height: 1.65; font-weight: 300; }

/* PROCESS (VS BLOCK) */
.process { padding: 80px 40px; background: var(--surface); border-top: 1px solid var(--border); }
.process-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; align-items: center; }
.process-title { font-family: var(--font-display); font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1.2; margin-bottom: 20px; }
.process-body { font-size: 0.95rem; color: var(--fg-light); line-height: 1.7; font-weight: 300; }
.vs-block { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.vs-col { padding: 28px 24px; }
.vs-old { background: var(--bg); }
.vs-new { background: rgba(245,158,11,0.04); }
.vs-col-label { font-family: var(--font-display); font-size: 0.65rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 20px; }
.old-label { color: var(--fg-light); }
.new-label { color: var(--accent); }
.vs-divider { background: var(--border); display: flex; align-items: center; justify-content: center; padding: 0 16px; font-family: var(--font-display); font-size: 0.75rem; font-weight: 600; color: var(--fg-light); letter-spacing: 0.05em; }
.vs-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 16px; font-size: 0.82rem; color: var(--fg-light); line-height: 1.4; }
.vs-item:last-child { margin-bottom: 0; }
.vs-tag { font-size: 0.65rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; padding: 2px 7px; border-radius: 2px; flex-shrink: 0; margin-top: 1px; }
.vs-tag.fail { background: rgba(255,100,100,0.1); color: #e05a5a; }
.vs-tag.pass { background: rgba(80,200,120,0.12); color: #3a9e6a; }

/* CLOSING */
.closing { padding: 100px 40px; background: var(--bg-dark); text-align: center; }
.closing-inner { max-width: 700px; margin: 0 auto; }
.closing-headline { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.1; color: #fff; margin-bottom: 28px; }
.closing-body { font-size: 1.05rem; color: rgba(255,255,255,0.5); line-height: 1.75; margin-bottom: 48px; font-weight: 300; }
.closing-tagline { font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.closing-cta { display: inline-block; background: var(--accent); color: #fff; padding: 14px 36px; border-radius: var(--radius); font-family: var(--font-display); font-size: 0.9rem; font-weight: 600; text-decoration: none; letter-spacing: 0.02em; transition: opacity 0.15s; margin-bottom: 32px; }
.closing-cta:hover { opacity: 0.88; color: #fff; }

/* FOOTER */
.footer { padding: 48px 40px; border-top: 1px solid var(--border); }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.footer-brand { font-family: var(--font-display); font-weight: 800; font-size: 1rem; color: var(--fg); letter-spacing: -0.02em; }
.footer-sub { font-size: 0.85rem; color: var(--fg-light); }
.footer-note { font-size: 0.75rem; color: var(--fg-light); opacity: 0.6; }

/* MOBILE */
@media (max-width: 768px) {
  .hero { padding: 72px 24px 60px; }
  .hero-stat-row { gap: 28px; }
  .how { padding: 60px 24px; }
  .how-grid { grid-template-columns: 1fr; }
  .features { padding: 60px 24px; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .process { padding: 60px 24px; }
  .process-inner { grid-template-columns: 1fr; gap: 48px; }
  .vs-block { grid-template-columns: 1fr; }
  .vs-divider { padding: 16px 0; writing-mode: horizontal-tb; }
  .closing { padding: 72px 24px; }
  .footer { padding: 40px 24px; }
  .nav { padding: 16px 24px; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .hero-headline { font-size: 2.8rem; }
}