/* ========================
   Design Tokens
   ======================== */
:root {
  --bg: #EEEEF2;
  --bg-dark: #0A0A0A;
  --text-primary: #1A1A1A;
  --text-secondary: #5F5F6A;
  --text-muted: #9999A8;
  --text-on-dark: #FFFFFF;
  --accent-blue: #4285F4;
  --accent-red: #EA4335;
  --accent-yellow: #FBBC04;
  --accent-green: #34A853;
  --border: rgba(0, 0, 0, 0.08);
  --border-dark: rgba(255, 255, 255, 0.08);
  --nav-height: 56px;
  --radius-pill: 9999px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --font: 'Inter', 'Google Sans', -apple-system, sans-serif;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================
   Reset & Base
   ======================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* ========================
   Buttons
   ======================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--text-primary);
  color: #FFFFFF;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-secondary);
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.btn-secondary:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.05);
}

/* ========================
   Navigation
   ======================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(238, 238, 242, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(238, 238, 242, 0.95);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.nav-logo svg {
  color: var(--accent-blue);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.05);
}

/* ========================
   Hero Section
   ======================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--nav-height);
  background: linear-gradient(180deg,
      #EBEBEF 0%,
      #E5E5EC 60%,
      #E0E0EB 100%);
}

.particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Bottom gradient fade into next section */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--bg-dark));
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
  animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero-badge svg {
  color: var(--accent-blue);
}

.hero-title {
  font-size: clamp(48px, 7vw, 88px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-wrap: wrap;
}

/* ========================
   Demo Section
   ======================== */
.demo-section {
  background: var(--bg-dark);
  padding: 0 24px 80px;
  display: flex;
  justify-content: center;
  position: relative;
}

.demo-window {
  position: relative;
  width: 100%;
  max-width: 900px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.8);
  background: #111;
  border: 1px solid rgba(255, 255, 255, 0.08);
  top: -40px;
}

.demo-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.4;
}

.demo-ui {
  position: relative;
  z-index: 2;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

.demo-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.demo-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red {
  background: #FF5F57;
}

.dot-yellow {
  background: #FEBC2E;
}

.dot-green {
  background: #28C840;
}

.demo-title-bar {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  font-family: 'Google Sans Code', monospace;
}

.demo-body {
  display: flex;
  flex: 1;
  min-height: 360px;
}

.demo-sidebar {
  width: 180px;
  background: rgba(255, 255, 255, 0.02);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.demo-sidebar-item {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  cursor: default;
  transition: background var(--transition), color var(--transition);
}

.demo-sidebar-item.active {
  background: rgba(66, 133, 244, 0.2);
  color: #6BA8FF;
}

.demo-sidebar-item:hover:not(.active) {
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.6);
}

.demo-main {
  flex: 1;
  padding: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-content: flex-start;
}

.demo-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  min-width: 160px;
}

.demo-card-label {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.demo-card-value {
  font-size: 32px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.03em;
  line-height: 1;
}

.demo-card-trend {
  font-size: 12px;
  color: #34A853;
  margin-top: 6px;
}

.demo-code {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: 'Google Sans Code', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.code-keyword {
  color: #6BA8FF;
}

.code-string {
  color: #A8D8A8;
}

.code-value {
  color: #FFD580;
}

.demo-play-btn {
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 3;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: background var(--transition);
}

.demo-play-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}

/* ========================
   Features Section
   ======================== */
.features-section {
  background: var(--bg);
  padding: 100px 24px;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 56px;
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: default;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  background: none !important;
}



.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ========================
   Status Section
   ======================== */
.status-section {
  background: var(--bg);
  padding: 0 24px 40px;
}

.status-bar {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 14px 24px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 3px rgba(52, 168, 83, 0.2);
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    box-shadow: 0 0 0 3px rgba(52, 168, 83, 0.2);
  }

  50% {
    box-shadow: 0 0 0 6px rgba(52, 168, 83, 0.1);
  }
}

.status-meta {
  font-size: 13px;
  color: var(--text-muted);
}

/* ========================
   Footer
   ======================== */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 64px 24px 0;
  overflow: hidden;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.footer-brand {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text-secondary);
  max-width: 300px;
  line-height: 1.4;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-col-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

/* 超大きなワードマーク */
.footer-wordmark {
  font-size: clamp(64px, 12vw, 180px);
  font-weight: 900;
  letter-spacing: -0.05em;
  color: var(--text-primary);
  line-height: 0.88;
  margin-bottom: 0;
  margin-left: -4px;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal a {
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* ========================
   Responsive
   ======================== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero-title {
    font-size: 44px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .demo-sidebar {
    display: none;
  }

  .footer-top {
    flex-direction: column;
  }

  .footer-links {
    flex-direction: column;
    gap: 32px;
  }

  .footer-wordmark {
    font-size: clamp(48px, 14vw, 120px);
  }
}

/* ========================
   Scroll animations
   ======================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================
   Modal
   ======================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: relative;
  background: #FFFFFF;
  border-radius: 24px;
  padding: 48px 40px 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.18);
  transform: translateY(16px) scale(0.97);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover {
  background: rgba(0, 0, 0, 0.1);
  color: var(--text-primary);
}

.modal-icon {
  font-size: 40px;
  margin-bottom: 16px;
  line-height: 1;
}

.modal-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.modal-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-input-wrap {
  display: flex;
  gap: 8px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 5px 5px 5px 18px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.modal-input-wrap:focus-within {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.15);
}

.modal-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  font-family: var(--font);
  color: var(--text-primary);
  outline: none;
  min-width: 0;
}

.modal-input::placeholder {
  color: var(--text-muted);
}

.modal-submit {
  flex-shrink: 0;
  padding: 10px 20px;
  font-size: 14px;
}

.modal-note {
  font-size: 12px;
  color: #EA4335;
  min-height: 18px;
  text-align: left;
}

.modal-privacy {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

/* 成功ステート */
.modal-success {
  animation: fadeUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.modal-success-icon {
  font-size: 48px;
  margin-bottom: 16px;
  line-height: 1;
}

@media (max-width: 480px) {
  .modal {
    padding: 40px 24px 32px;
  }

  .modal-input-wrap {
    flex-direction: column;
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    gap: 12px;
  }

  .modal-submit {
    width: 100%;
    justify-content: center;
    border-radius: var(--radius-pill);
  }
}