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

:root {
  /* Colors */
  --bg-primary: #0b0b0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a28;
  --bg-card-hover: #22223a;
  --border-color: rgba(99, 102, 241, 0.15);
  --border-color-hover: rgba(99, 102, 241, 0.4);

  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-accent: linear-gradient(135deg, #6366f1, #22d3ee);
  --gradient-hero: linear-gradient(160deg, #0b0b0f 0%, #1a1a2e 40%, #1e1b4b 100%);

  --indigo: #6366f1;
  --purple: #8b5cf6;
  --cyan: #22d3ee;

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans JP', sans-serif;

  /* Spacing */
  --section-padding: 100px 0;
  --container-width: 1100px;

  /* Effects */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #67e8f9;
}

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

/* ============================================
   Utility
   ============================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section {
  padding: var(--section-padding);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 48px;
}

.section-subtitle.center {
  margin-left: auto;
  margin-right: auto;
}

.text-center {
  text-align: center;
}

/* ============================================
   Header / Navigation
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 11, 15, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.logo span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav a:hover,
.nav a.active {
  color: var(--text-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: var(--gradient-primary);
  color: #fff !important;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  color: #fff !important;
}

/* Mobile menu button */
.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ============================================
   Hero
   ============================================ */
.hero {
  background: var(--gradient-hero);
  padding: 180px 0 120px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--indigo);
  margin-bottom: 28px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--indigo);
  border-radius: 50%;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  font-family: var(--font-sans);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.35);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color-hover);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.08);
  border-color: var(--indigo);
  color: var(--text-primary);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px 32px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: 12px;
  margin-bottom: 20px;
  font-size: 1.25rem;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Grid layouts
   ============================================ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* ============================================
   Stats
   ============================================ */
.stats {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 60px 0;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================
   Plan / Pricing
   ============================================ */
.plan-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px 36px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.plan-card:hover {
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-glow);
}

.plan-card.featured {
  border-color: var(--indigo);
  box-shadow: var(--shadow-glow);
}

.plan-card.featured::before {
  content: 'おすすめ';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 100px;
}

.plan-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.plan-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li::before {
  content: '✓';
  color: var(--cyan);
  font-weight: 700;
  font-size: 0.85rem;
}

/* ============================================
   Flow / Steps
   ============================================ */
.flow-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.flow-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.flow-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 14px;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
}

.flow-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.flow-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Works / Portfolio
   ============================================ */
.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.work-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.work-thumb {
  width: 100%;
  height: 200px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.work-info {
  padding: 24px;
}

.work-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}

.work-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.work-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   About / Company
   ============================================ */
.company-table {
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.company-table th {
  width: 160px;
  color: var(--text-secondary);
  font-weight: 600;
}

.company-table td {
  color: var(--text-primary);
}

/* ============================================
   Contact Form
   ============================================ */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group label .required {
  color: #ef4444;
  margin-left: 4px;
  font-size: 0.75rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  transition: border-color var(--transition);
}

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

.form-textarea {
  min-height: 160px;
  resize: vertical;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: 80px 0;
}

.cta-section h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
  max-width: 280px;
}

.footer-links h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 4px 0;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================
   FAQ
   ============================================ */
.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 24px 0;
}

.faq-question {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-question::before {
  content: 'Q';
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
}

.faq-answer {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 40px;
}

/* ============================================
   Page header (sub pages)
   ============================================ */
.page-header {
  background: var(--gradient-hero);
  padding: 140px 0 60px;
  text-align: center;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero {
    padding: 140px 0 80px;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .nav {
    display: none;
  }

  .menu-btn {
    display: block;
  }

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

  .hero-actions {
    flex-direction: column;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .plan-price {
    font-size: 2rem;
  }

  .company-table th {
    width: 100px;
  }

  .flow-item {
    gap: 16px;
  }
}

/* Mobile Nav */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
    gap: 8px;
    z-index: 999;
  }
  .nav.nav-open {
    display: flex;
  }
  .nav a {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
  }
  .nav a:last-child {
    border-bottom: none;
  }
}