:root {
  --bg: #0a0e14;
  --bg-alt: #0d1320;
  --surface: #121926;
  --surface-2: #161f2e;
  --border: rgba(255,255,255,0.08);
  --text: #e8ecf3;
  --text-dim: #8b93a3;
  --accent: #4f7cff;
  --accent-2: #35d9c1;
  --grad: linear-gradient(135deg, #4f7cff 0%, #35d9c1 100%);
  --radius: 16px;
  --maxw: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(10,14,20,0.75);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo-mark {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: var(--grad);
  box-shadow: 0 0 20px rgba(79,124,255,0.5);
}
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14.5px;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background .2s;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--grad);
  color: #06090f;
  box-shadow: 0 8px 24px rgba(79,124,255,0.35);
}
.btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}
.btn-outline:hover { border-color: rgba(255,255,255,0.25); }
.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
  padding: 10px 20px;
}
.btn-lg { padding: 16px 36px; font-size: 16px; }
.full { width: 100%; margin-top: 8px; }

/* Hero */
.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
  text-align: center;
}
.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(circle, rgba(79,124,255,0.25) 0%, rgba(53,217,193,0.08) 45%, transparent 70%);
  filter: blur(20px);
  pointer-events: none;
}
.hero-inner { position: relative; }
.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--accent-2);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 620px;
  margin: 0 auto 40px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat strong { font-size: 28px; font-weight: 800; }
.stat span { color: var(--text-dim); font-size: 13px; }

/* Sections */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  margin: 0 0 12px;
}
.section-sub {
  text-align: center;
  color: var(--text-dim);
  margin: 0 0 56px;
  font-size: 16px;
}

/* Cards / grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(79,124,255,0.35);
}
.card h3 { margin: 0 0 10px; font-size: 18px; font-weight: 700; }
.card p { margin: 0; color: var(--text-dim); font-size: 14.5px; }

.icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  margin-bottom: 20px;
  background: var(--grad);
  opacity: 0.9;
  mask-size: 22px;
  -webkit-mask-size: 22px;
  mask-repeat: no-repeat;
  -webkit-mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-position: center;
}

/* No-log section */
.nolog-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
.eyebrow {
  color: var(--accent-2);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.08em;
}
.nolog-text h2 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 14px 0 20px;
}
.nolog-text p {
  color: var(--text-dim);
  margin-bottom: 28px;
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.check-list li {
  position: relative;
  padding-left: 30px;
  font-weight: 500;
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--grad);
}
.check-list li::after {
  content: '✓';
  position: absolute;
  left: 4px;
  top: 1px;
  font-size: 12px;
  font-weight: 800;
  color: #06090f;
}

.nolog-visual {
  display: flex;
  justify-content: center;
}
.orbit-card {
  position: relative;
  width: 260px;
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.orbit-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(79,124,255,0.35);
  animation: spin 16s linear infinite;
}
.orbit-core {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 60px rgba(79,124,255,0.25);
}
.orbit-core span {
  font-weight: 800;
  letter-spacing: 0.05em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Pricing */
.pricing-contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.pricing-label {
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
}

/* Download */
.download-section { text-align: center; }
.download-inner h2 { font-size: 32px; font-weight: 800; margin: 0 0 12px; }
.download-inner p { color: var(--text-dim); margin: 0 0 32px; }
.download-note { margin-top: 24px; font-size: 14px; }
.download-note a { color: var(--accent-2); text-decoration: none; }

/* FAQ */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  float: right;
  color: var(--accent-2);
  font-weight: 800;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  color: var(--text-dim);
  margin: 14px 0 0;
  font-size: 14.5px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  color: var(--text-dim);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 38px; }
  .hero-stats { gap: 32px; flex-wrap: wrap; }
  .grid-3 { grid-template-columns: 1fr; }
  .nolog-inner { grid-template-columns: 1fr; text-align: center; }
  .check-list li { text-align: left; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}