/* ============================================================
   寄り添いソリューション LP - Design System & Styles
   ============================================================ */

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

:root {
  /* Colors */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.95);

  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --accent: #2563eb; /* コーポレートブルー */
  --accent-light: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.15);
  --accent-gradient: linear-gradient(135deg, #1e3a8a, #2563eb, #3b82f6);

  --border: #e2e8f0;
  --border-hover: #cbd5e1;

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

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Transitions */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

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

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
}

.nav-logo-img {
  height: 52px;
  width: auto;
  display: block;
}

.footer-logo-img {
  height: 44px;
  width: auto;
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: var(--transition);
  letter-spacing: 0.01em;
}

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

.nav-cta {
  background: var(--accent-gradient);
  color: white !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
}

.nav-cta:hover {
  opacity: 0.9;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15; /* 白背景なので透明度を下げる */
  animation: orbFloat 20s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #3b82f6, transparent 70%);
  top: -10%;
  right: -10%;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #60a5fa, transparent 70%);
  bottom: -10%;
  left: -5%;
  animation-delay: -7s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #93c5fd, transparent 70%);
  top: 40%;
  left: 40%;
  animation-delay: -14s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 720px;
}

.hero-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent-light);
  margin-bottom: 28px;
  padding: 6px 16px;
  border: 1px solid var(--accent-glow);
  border-radius: 100px;
  background: rgba(99, 102, 241, 0.08);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

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

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

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

.btn-ghost:hover {
  background: var(--bg-glass);
  border-color: var(--text-muted);
}

.btn-large {
  padding: 18px 48px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
}

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

.hero-stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-stat-num small {
  font-size: 0.6em;
  -webkit-text-fill-color: inherit;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

/* --- Sections --- */
.section {
  padding: var(--section-padding) 0;
}

.section-dark {
  background: var(--bg-secondary);
}

.section-tag {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent-light);
  text-align: center;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-sub {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 56px;
}

/* --- Services --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(24px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.service-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  margin-bottom: 20px;
}

.service-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.strength-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(24px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.strength-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.strength-item:hover {
  border-color: var(--accent-glow);
}

.strength-num {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.strength-item h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.strength-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Portfolio --- */
.portfolio-filters {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.filter-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: white;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(16px);
  animation: fadeInUp 0.4s ease forwards;
  box-shadow: 0 4px 15px rgba(0,0,0,0.04);
}

.portfolio-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

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

.portfolio-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

.portfolio-category {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--accent-glow);
  color: var(--accent-light);
  white-space: nowrap;
  flex-shrink: 0;
}

.portfolio-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.portfolio-title {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
}

.portfolio-platform {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.portfolio-loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

/* --- CTA --- */
.section-cta {
  background: var(--bg-secondary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.section-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  opacity: 0.3;
  pointer-events: none;
}

.cta-content {
  position: relative;
}

.cta-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.cta-info {
  max-width: 500px;
  margin: 0 auto 40px;
}

.cta-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  padding: 16px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.cta-email {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* --- LINE Package --- */
.line-package-card {
  background: var(--bg-card);
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--accent);
  box-shadow: 0 10px 30px rgba(37,99,235,0.1);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}

/* --- Footer --- */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

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

.footer-logo {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* --- Animations --- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --section-padding: 80px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links li:last-child {
    border-bottom: none;
    padding-top: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 100px 20px 60px;
    min-height: auto;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-sub {
    font-size: 0.92rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-num {
    font-size: 1.6rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-card {
    padding: 28px 24px;
  }

  .strengths-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .portfolio-filters {
    gap: 6px;
  }

  .filter-btn {
    padding: 6px 14px;
    font-size: 0.8rem;
  }
  
  .line-package-card {
    padding: 24px 16px;
  }
  
  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .btn-large {
    padding: 16px 36px;
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }
}