/* ===== LB TAB Layers LP — Light Minimal (Apple-inspired sizing) ===== */

/* ---------- RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #F5F5F7;
  --bg-white: #FFFFFF;
  --bg-card: #F2F2F2;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.12);
  --text: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  --text-quaternary: #AEAEB2;
  --accent: #4A60D1;
  --accent-soft: rgba(74, 96, 209, 0.08);
  --radius: 16px;
  --radius-lg: 28px;
  --radius-pill: 980px;
  --max-w: 1080px;
  --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  word-break: keep-all;
  overflow-wrap: break-word;
}

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

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

/* ---------- TYPOGRAPHY (Apple-scale) ---------- */
h1 {
  font-size: clamp(2.8rem, 7vw, 4.8rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--text);
}
h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
}
h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.35; }
h4 { font-size: 1.05rem; font-weight: 600; }

.text-gradient {
  background: linear-gradient(135deg, #4A60D1, #8B5CF6, #EC4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 1.05rem;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--text);
  color: white;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.2);
  opacity: 0.9;
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--bg-white); color: var(--text); }
.btn-large { padding: 20px 44px; font-size: 1.15rem; }

.badge-soon {
  display: inline-block;
  padding: 2px 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
  vertical-align: middle;
  margin-left: 4px;
}

/* ---------- HEADER (Floating Pill) ---------- */
#site-header {
  position: fixed;
  top: 20px; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  pointer-events: none;
}
.nav-container {
  pointer-events: auto;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 6px 6px 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  margin-right: 8px;
}
.logo-icon {
  width: 30px; height: 30px;
  border-radius: 7px;
  object-fit: contain;
}
.logo-text { color: var(--text); }

.nav-links {
  display: flex;
  gap: 4px;
}
.nav-links a {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  font-weight: 450;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}
.nav-links a:hover {
  color: var(--text);
  background: rgba(0,0,0,0.04);
}

.nav-cta {
  background: var(--text);
  color: white;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.nav-cta:hover { opacity: 0.85; }

/* ---------- HERO ---------- */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 140px 24px 100px;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.hero-glow {
  position: absolute;
  top: 20%; left: 50%;
  transform: translateX(-50%);
  width: 140vw; height: 140vw;
  background: radial-gradient(
    circle at center,
    transparent 30%,
    rgba(255, 172, 227, 0.12) 42%,
    rgba(255, 241, 172, 0.06) 48%,
    rgba(121, 201, 255, 0.12) 55%,
    rgba(74, 96, 209, 0.06) 65%,
    transparent 80%
  );
  pointer-events: none;
  filter: blur(40px);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.badge-dot {
  width: 6px; height: 6px;
  background: #22C55E;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-sub {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-top: 28px;
  line-height: 1.7;
  font-weight: 400;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 44px;
  flex-wrap: wrap;
}
.hero-note {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-top: 24px;
}

/* Hero Visual */
.hero-visual { display: none; }

/* ---------- SCREENSHOT PLACEHOLDER ---------- */
.screenshot-placeholder { padding: 16px; }
.sp-sidebar { display: flex; flex-direction: column; gap: 6px; }
.sp-group {
  background: rgba(0,0,0,0.02);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
}
.sp-group-header {
  font-size: 0.85rem; font-weight: 600; color: var(--text);
  display: flex; align-items: center; gap: 6px; margin-bottom: 4px;
}
.sp-dot { width: 8px; height: 8px; border-radius: 50%; }
.sp-tab {
  font-size: 0.78rem; color: var(--text-secondary);
  padding: 3px 8px 3px 16px; border-radius: 4px; margin: 1px 0;
}
.sp-tab.active { background: var(--accent-soft); color: var(--accent); }
.sp-badge {
  background: #EF4444; color: white;
  font-size: 0.6rem; font-weight: 700;
  padding: 1px 5px; border-radius: 50px; margin-right: 4px;
}

/* ---------- PAIN POINTS ---------- */
#pain-points { padding: 100px 0 80px; }
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.pain-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition);
}
.pain-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.06); transform: translateY(-2px); }
.pain-icon { font-size: 2.2rem; margin-bottom: 16px; }
.pain-card h3 { margin-bottom: 10px; font-size: 1.2rem; }
.pain-card p { font-size: 1.05rem; color: var(--text-secondary); font-weight: 400; line-height: 1.6; }

.pain-solution { text-align: center; margin-top: 56px; }
.solution-arrow {
  font-size: 1.5rem; color: var(--accent); margin-bottom: 12px;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}
.solution-text { font-size: 1.3rem; color: var(--text); font-weight: 400; }

/* ---------- FEATURE SHOWCASE ---------- */
.feature-showcase { padding: 120px 0; }
.feature-header { text-align: center; margin-bottom: 64px; }
.feature-tag {
  display: inline-block;
  padding: 8px 18px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.feature-header h2 { margin-bottom: 16px; }
.feature-header p { color: var(--text-secondary); font-size: 1.15rem; max-width: 500px; margin: 0 auto; font-weight: 400; }

/* Persistence cards */
.persist-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}
.persist-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
}
.persist-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.06); transform: translateY(-2px); }
.persist-icon { font-size: 2.2rem; margin-bottom: 14px; }
.persist-card h4 { margin-bottom: 8px; font-size: 1.05rem; }
.persist-card p { font-size: 0.95rem; color: var(--text-secondary); }

.persist-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.compare-bad, .compare-good {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-white);
}
.compare-bad { border-left: 3px solid #EF4444; }
.compare-good { border-left: 3px solid #22C55E; }
.compare-bad h4, .compare-good h4 { margin-bottom: 8px; font-size: 1rem; }
.compare-bad p, .compare-good p { font-size: 0.95rem; color: var(--text-secondary); }

/* ---------- FEATURES GRID ---------- */
#features { padding: 120px 0; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.feat-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all var(--transition);
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.feat-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.06); transform: translateY(-1px); }
.feat-icon { font-size: 1.8rem; flex-shrink: 0; margin-top: 2px; }
.feat-card h3 { margin-bottom: 6px; font-size: 1.1rem; }
.feat-card p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; font-weight: 400; }

/* ---------- THEMES ---------- */
#themes { padding: 100px 0; }
.theme-showcase {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.theme-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  transition: all var(--transition);
  cursor: default;
}
.theme-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.06); transform: translateY(-2px); }
.theme-preview { display: flex; gap: 6px; justify-content: center; margin-bottom: 10px; }
.theme-dot {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border);
}
.theme-name { font-size: 0.8rem; color: var(--text-tertiary); font-weight: 450; }
.theme-more { text-align: center; margin-top: 20px; color: var(--text-tertiary); font-size: 0.95rem; }

/* ---------- COMPARISON TABLE ---------- */
#compare { padding: 100px 0; }
.compare-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 720px;
}
.compare-table th,
.compare-table td {
  padding: 16px 18px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.compare-table thead th {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: var(--bg);
  position: sticky;
  top: 0;
}
.compare-table .feature-col {
  text-align: left;
  font-weight: 500;
  color: var(--text);
  min-width: 180px;
}
.compare-table td:first-child {
  text-align: left;
  font-weight: 450;
  color: var(--text);
}
.compare-table .highlight-col {
  background: rgba(74, 96, 209, 0.04);
  font-weight: 500;
}
.compare-table thead .highlight-col {
  background: var(--accent);
  color: white;
  font-weight: 700;
  font-size: 0.95rem;
}
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody tr:hover { background: rgba(0,0,0,0.01); }

.t-yes { color: #16A34A; font-weight: 600; }
.t-no { color: #D4D4D8; }
.t-half { color: #F59E0B; }
.t-only {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(74, 96, 209, 0.1);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  vertical-align: middle;
  margin-left: 2px;
}
.t-price-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-weight: 400;
}
.price-row td { font-size: 0.95rem; }

/* ---------- PRIVACY ---------- */
#privacy { padding: 80px 0; }
.privacy-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px;
}
.privacy-card h2 { text-align: center; margin-bottom: 36px; }
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.privacy-item h4 { margin-bottom: 8px; color: var(--text); font-size: 1.05rem; }
.privacy-item p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; }

/* ---------- COMING SOON (v2.6) ---------- */
#coming-soon { padding: 100px 0; }
.coming-soon-card {
  background: var(--bg-white);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.coming-soon-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, #4A60D1, #8B5CF6, #EC4899, #4A60D1);
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: border-shimmer 4s ease-in-out infinite;
  pointer-events: none;
}
@keyframes border-shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.cs-glow {
  position: absolute;
  top: -80px; left: 50%;
  transform: translateX(-50%);
  width: 400px; height: 250px;
  background: radial-gradient(ellipse, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.cs-badge {
  display: inline-block;
  padding: 6px 18px;
  background: var(--text);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: white;
  margin-bottom: 24px;
}
.coming-soon-card h2 { margin-bottom: 10px; }
.cs-sub { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 40px; font-weight: 400; }
.cs-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  text-align: left;
}
.cs-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.cs-item:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.04); }
.cs-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.cs-item h4 { margin-bottom: 4px; font-size: 1rem; }
.cs-item p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.5; }

/* ---------- FAQ ---------- */
#faq { padding: 100px 0; }
.faq-list { max-width: 680px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary {
  padding: 22px 0;
  cursor: pointer;
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}
.faq-item summary:hover { color: var(--accent); }
.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--text-quaternary);
  transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  padding: 0 0 22px;
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- FINAL CTA ---------- */
#final-cta {
  padding: 140px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
#final-cta::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse,
    rgba(121, 201, 255, 0.08) 0%,
    rgba(255, 172, 227, 0.06) 40%,
    transparent 70%
  );
  pointer-events: none;
}
#final-cta h2 { margin-bottom: 20px; position: relative; }
#final-cta p { color: var(--text-secondary); margin-bottom: 36px; position: relative; font-weight: 400; font-size: 1.15rem; }

/* ---------- FOOTER ---------- */
#site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 36px;
}
.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-top: 12px;
  line-height: 1.7;
}
.footer-logo {
  width: 80px; height: auto;
  margin-bottom: 8px;
}
.social-share {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}
.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-tertiary);
  transition: all var(--transition);
}
.share-btn:hover {
  background: var(--text);
  color: white;
  border-color: var(--text);
  transform: translateY(-2px);
}
.footer-links h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-quaternary);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-links a {
  display: block;
  font-size: 0.95rem;
  color: var(--text-tertiary);
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; }
.footer-bottom p { font-size: 0.8rem; color: var(--text-quaternary); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-actions { flex-direction: column; align-items: center; }
  .pain-grid { grid-template-columns: 1fr; }
  .persist-grid { grid-template-columns: 1fr; }
  .persist-compare { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .theme-showcase { grid-template-columns: repeat(2, 1fr); }
  .privacy-grid { grid-template-columns: 1fr; }
  .cs-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .privacy-card { padding: 32px 20px; }
  .coming-soon-card { padding: 36px 20px; }
  #hero { padding: 120px 16px 60px; }
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.6rem; }

  /* Prevent text overflow on mobile */
  .container { padding: 0 16px; }
  .btn { padding: 14px 24px; font-size: 1rem; }
  .btn-large { padding: 16px 28px; font-size: 1.05rem; }
  .hero-sub { font-size: 1.05rem; }
  .hero-note { font-size: 0.8rem; }
  .feature-header p { font-size: 1rem; }
  .pain-card p, .persist-card p { font-size: 0.95rem; }
  .feat-card { padding: 24px 20px; }
  .feat-card p { font-size: 0.92rem; }
  .faq-item summary { font-size: 1rem; }
  .faq-item p { font-size: 0.95rem; }
  .cs-item p { font-size: 0.85rem; }
  .privacy-item p { font-size: 0.92rem; }
  #final-cta { padding: 80px 0; }
  #final-cta p { font-size: 1rem; }

  /* Comparison table mobile */
  .compare-table { font-size: 0.8rem; }
  .compare-table th, .compare-table td { padding: 10px 8px; }
}

@media (min-width: 1024px) {
  .hero-visual {
    display: block;
    position: absolute;
    right: -40px;
    top: 50%;
    transform: translateY(-50%);
    width: 340px;
  }
  .hero-browser-frame {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
  }
  .browser-dots {
    display: flex;
    gap: 5px;
    padding: 10px 14px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
  }
  .browser-dots span {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(0,0,0,0.1);
  }
  .browser-dots span:first-child { background: #EF4444; }
  .browser-dots span:nth-child(2) { background: #F59E0B; }
  .browser-dots span:nth-child(3) { background: #22C55E; }
}

/* ---------- SCROLL ANIMATIONS ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}