:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a2e;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --accent: #f97316;
  --border: #1e293b;
  --radius: 12px;
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* Nav */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.logo svg { color: var(--primary-light); }

.nav-cta {
  padding: 8px 20px;
  background: var(--primary);
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s;
}

.nav-cta:hover { background: var(--primary-light); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
  background: var(--bg-card-hover);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: #252540; }

.btn-large { padding: 18px 48px; font-size: 18px; }

/* Hero */
.hero {
  padding: 140px 0 80px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.3);
  border-radius: 100px;
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.hero-cta { margin-bottom: 48px; }

.hero-note {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Demo visual */
.hero-demo {
  max-width: 600px;
  margin: 0 auto;
}

.demo-input {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
}

.demo-icon { font-size: 20px; }

.demo-url {
  flex: 1;
  color: var(--text-muted);
  text-align: left;
}

.demo-btn {
  padding: 8px 16px;
  background: var(--primary);
  color: white;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
}

.demo-arrow {
  font-size: 24px;
  color: var(--primary-light);
  padding: 16px 0;
}

.demo-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.demo-card {
  padding: 20px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.demo-num {
  display: block;
  font-size: 32px;
  font-weight: 900;
  color: var(--primary-light);
  margin-bottom: 4px;
}

/* Sections */
section { padding: 80px 0; }

h2 {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 48px;
  font-size: 16px;
}

.highlight { color: var(--primary-light); }

/* Problem */
.problem { background: var(--bg-card); }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.problem-card {
  padding: 32px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.problem-icon { font-size: 36px; margin-bottom: 16px; }

.problem-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.problem-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Steps */
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  margin-top: 48px;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.step-num {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  margin: 0 auto 16px;
}

.step h3 { font-size: 18px; margin-bottom: 8px; }

.step p {
  font-size: 14px;
  color: var(--text-muted);
}

.step-arrow {
  font-size: 24px;
  color: var(--primary-light);
  padding-top: 48px;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.feature-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.feature-card:hover { border-color: var(--primary); }

.feature-icon { font-size: 28px; margin-bottom: 12px; }

.feature-card h3 { font-size: 16px; margin-bottom: 6px; }

.feature-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Diff table */
.diff { background: var(--bg-card); }

.diff-table-wrap { overflow-x: auto; margin-top: 48px; }

.diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.diff-table th, .diff-table td {
  padding: 14px 20px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.diff-table th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 13px;
}

.diff-highlight {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary-light);
  font-weight: 600;
}

.diff-table td:first-child {
  text-align: left;
  font-weight: 500;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 48px auto 0;
}

.pricing-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  position: relative;
}

.pricing-featured {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(37, 99, 235, 0.15);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--primary);
  color: white;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
}

.pricing-card h3 { font-size: 20px; margin-bottom: 8px; }

.price {
  font-size: 42px;
  font-weight: 900;
  margin-bottom: 24px;
}

.price span { font-size: 16px; font-weight: 400; color: var(--text-muted); }

.pricing-card ul {
  list-style: none;
  margin-bottom: 28px;
  text-align: left;
}

.pricing-card li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.pricing-card li::before {
  content: "✓ ";
  color: var(--primary-light);
  font-weight: 700;
}

/* FAQ */
.faq-list {
  max-width: 700px;
  margin: 48px auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  padding: 20px 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
}

.faq-item summary::before {
  content: "+";
  margin-right: 12px;
  color: var(--primary-light);
  font-size: 18px;
  font-weight: 700;
}

.faq-item[open] summary::before { content: "−"; }

.faq-item p {
  padding: 0 0 20px 28px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* Final CTA */
.final-cta {
  text-align: center;
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(37, 99, 235, 0.05) 100%);
}

.final-cta p {
  color: var(--text-muted);
  margin: 12px 0 32px;
  font-size: 16px;
}

/* Footer */
footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-inner p {
  font-size: 12px;
  color: var(--text-muted);
}

/* Mobile */
@media (max-width: 768px) {
  .problem-grid, .feature-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); padding: 8px 0; }
  .pricing-grid { grid-template-columns: 1fr; }
  .demo-results { grid-template-columns: repeat(3, 1fr); }
  .diff-table { font-size: 12px; }
  .diff-table th, .diff-table td { padding: 10px 8px; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}