:root {
  --color-primary: #4A5FC1;
  --color-primary-dark: #3A4DA0;
  --color-accent: #F5A623;
  --color-bg: #0D1117;
  --color-bg-section: #161B22;
  --color-surface: #1C2333;
  --color-text: #E6EDF3;
  --color-text-muted: #8B949E;
  --color-border: #30363D;
  --max-width: 960px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-accent); }

img { max-width: 100%; height: auto; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header .logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-header nav { display: flex; align-items: center; gap: 1.5rem; }
.site-header nav a { color: var(--color-text-muted); font-size: 0.9rem; }
.site-header nav a:hover { color: var(--color-text); }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  font-size: 0.8rem;
}
.lang-toggle a {
  padding: 0.25rem 0.6rem;
  color: var(--color-text-muted);
}
.lang-toggle a.active {
  background: var(--color-primary);
  color: #fff;
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 1.5rem 4rem;
  background: linear-gradient(180deg, #0D1117 0%, #141D2B 100%);
}

.hero .app-icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  margin-bottom: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.hero h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.hero .stats {
  font-size: 0.9rem;
  color: var(--color-accent);
  margin-bottom: 2rem;
}

.badge-appstore {
  display: inline-block;
  height: 48px;
}
.badge-appstore img { height: 48px; }

/* Section */
.section {
  padding: 4rem 1.5rem;
}

.section-alt { background: var(--color-bg-section); }

.section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.5rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.feature-card .icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Screenshots */
.screenshots {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding: 1rem 0;
  max-width: var(--max-width);
  margin: 0 auto;
  justify-content: center;
}

.screenshot-img {
  flex: 0 0 auto;
  height: 480px;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.screenshot-placeholder {
  flex: 0 0 200px;
  height: 420px;
  border: 2px dashed var(--color-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Premium */
.premium-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
}

.premium-card .price {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 1rem 0;
}

.premium-card ul {
  list-style: none;
  text-align: left;
  margin: 1.5rem 0;
}

.premium-card ul li {
  padding: 0.4rem 0;
  color: var(--color-text-muted);
}

.premium-card ul li::before {
  content: "\2713 ";
  color: var(--color-accent);
  font-weight: 700;
}

/* Trust / Reliability */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.trust-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.trust-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.trust-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.faq-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-accent);
}

.faq-item p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* CTA */
.cta {
  padding: 4rem 1.5rem;
  background: linear-gradient(180deg, var(--color-bg-section) 0%, var(--color-bg) 100%);
}

.cta-box {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 3rem 2rem;
}

.cta-box h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.cta-box p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.site-footer nav {
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-footer nav a { color: var(--color-text-muted); }
.site-footer nav a:hover { color: var(--color-text); }

/* Legal pages */
.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.legal-content h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.legal-content .updated {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}

.legal-content h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.legal-content p,
.legal-content li {
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.8;
}

.legal-content ul, .legal-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.legal-content a { color: var(--color-primary); }

/* Contact form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.contact-form h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  font-size: 1rem;
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea { min-height: 150px; resize: vertical; }

.btn-submit {
  display: block;
  width: 100%;
  padding: 0.85rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 1.5rem;
}

.btn-submit:hover { background: var(--color-primary-dark); }

.form-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  text-align: center;
}

.form-success {
  text-align: center;
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
  border-radius: 12px;
  margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .site-header nav { gap: 1rem; }
}

@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; }
  .hero { padding: 3rem 1rem 2.5rem; }
  .hero h1 { font-size: 1.5rem; }
  .site-header { padding: 0.5rem 1rem; }
  .site-header nav { gap: 0.75rem; font-size: 0.85rem; }
  .cta-box { padding: 2rem 1.5rem; }
  .cta-box h2 { font-size: 1.3rem; }
}