:root {
  --accent: #10b981;
  --accent-ring: #34d399;
  --accent-soft: #d1fae5;
  --ink-900: #1a1914;
  --ink-800: #27261f;
  --ink-700: #3f3e38;
  --ink-500: #726f67;
  --ink-200: #e5e3de;
  --ink-100: #f2f1ef;
  --ink-50: #f9f9f8;
  --surface: #ffffff;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink-800);
  background: var(--ink-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 2px rgba(16,185,129,0.4);
}
.btn-primary:hover {
  background: #0ea271;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(16,185,129,0.3);
}
.btn-ghost {
  background: transparent;
  color: var(--ink-700);
  border: 1px solid var(--ink-200);
}
.btn-ghost:hover { background: var(--ink-100); }

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(249,249,248,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ink-200);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}
.logo-dot {
  width: 22px; height: 22px;
  border-radius: 6px;
  background: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a.link { color: var(--ink-500); font-weight: 500; font-size: 0.95rem; }
.nav-links a.link:hover { color: var(--ink-800); }

/* Hero */
.hero {
  padding: 96px 0 72px;
  text-align: center;
}
.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: #047857;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink-900);
  max-width: 16ch;
  margin: 0 auto 20px;
}
.hero h1 .accent { color: var(--accent); }
.hero p.sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--ink-500);
  max-width: 52ch;
  margin: 0 auto 36px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-note {
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--ink-500);
}

/* Sections */
section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  letter-spacing: -0.02em;
  color: var(--ink-900);
  margin-bottom: 12px;
}
.section-head p { color: var(--ink-500); max-width: 50ch; margin: 0 auto; }

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--ink-200);
  border-radius: 16px;
  padding: 28px;
}
.feature-highlight {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--surface) 60%);
}
.feature-tag {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
}
.feature .icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--ink-900); }
.feature p { color: var(--ink-500); font-size: 0.97rem; }

/* Pricing */
.pricing { background: var(--ink-100); }
.price-card {
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 24px;
  max-width: 480px;
  margin: 0 auto;
  padding: 44px 40px;
  text-align: center;
  box-shadow: 0 24px 48px -24px rgba(16,185,129,0.4);
}
.price-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
  margin: 20px 0 4px;
}
.price-amount .num {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink-900);
}
.price-amount .unit { font-size: 1.1rem; color: var(--ink-500); }
.price-card .per { color: var(--ink-500); margin-bottom: 28px; }
.price-list {
  list-style: none;
  text-align: left;
  margin: 0 auto 32px;
  max-width: 320px;
  display: grid;
  gap: 12px;
}
.price-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--ink-700);
}
.price-list svg { flex-shrink: 0; margin-top: 4px; }
.price-compare {
  margin-top: 28px;
  color: var(--ink-500);
  font-size: 0.95rem;
  max-width: 46ch;
  margin-left: auto;
  margin-right: auto;
}

/* FAQ */
.faq-list { max-width: 720px; margin: 0 auto; display: grid; gap: 12px; }
details {
  background: var(--surface);
  border: 1px solid var(--ink-200);
  border-radius: 12px;
  padding: 18px 22px;
}
details[open] { border-color: var(--accent-ring); }
summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink-900);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.4rem;
  line-height: 1;
}
details[open] summary::after { content: "−"; }
details p { margin-top: 12px; color: var(--ink-500); }

/* CTA band */
.cta-band { background: var(--accent); color: #fff; text-align: center; }
.cta-band h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); margin-bottom: 12px; letter-spacing: -0.02em; }
.cta-band p { opacity: 0.9; margin-bottom: 28px; }
.cta-band .btn-primary { background: #fff; color: #047857; }
.cta-band .btn-primary:hover { background: var(--ink-50); }

/* Footer */
footer {
  background: var(--ink-900);
  color: var(--ink-200);
  padding: 48px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--ink-200); font-size: 0.95rem; opacity: 0.8; }
.footer-links a:hover { opacity: 1; }
.footer-copy { font-size: 0.9rem; opacity: 0.7; }

@media (max-width: 768px) {
  .nav-links .link { display: none; }
  .hero { padding: 64px 0 48px; }
  section { padding: 56px 0; }
  .footer-inner { flex-direction: column; text-align: center; }
}