/* ============================================
   NOMAD HUB - Sunset Horizon Design
   Travel meets Technology
   ============================================ */

:root {
  /* Core Colors - Sunset Palette */
  --bg-main: #fefcfb;
  --bg-warm: #fff8f5;
  --bg-card: #ffffff;
  --bg-dark: #1a1a2e;
  
  /* Sunset Gradient Colors */
  --sunset-orange: #ff6b35;
  --sunset-coral: #ff8c61;
  --sunset-pink: #ff7eb3;
  --sunset-purple: #7c3aed;
  --sunset-deep: #4c1d95;
  
  /* Text Colors */
  --text-primary: #1a1a2e;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-light: #ffffff;
  
  /* Accent */
  --accent: #ff6b35;
  --accent-hover: #e85a2a;
  
  /* Borders & Shadows */
  --border-light: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(255, 107, 53, 0.15);
  
  /* Gradients */
  --gradient-sunset: linear-gradient(135deg, var(--sunset-orange), var(--sunset-coral), var(--sunset-pink));
  --gradient-hero: linear-gradient(135deg, #ff6b35 0%, #ff8c61 25%, #ff7eb3 50%, #7c3aed 75%, #4c1d95 100%);
  --gradient-text: linear-gradient(90deg, var(--sunset-orange), var(--sunset-pink));
  
  /* Typography */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Noto Sans JP', -apple-system, sans-serif;
  
  /* Spacing */
  --section-gap: 6rem;
  --container-max: 1200px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ============================================
   Header
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(254, 252, 251, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-smooth);
}

header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-sunset);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: white;
  box-shadow: var(--shadow-glow);
}

nav {
  display: flex;
  gap: 0.5rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-item a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition-fast);
}

.nav-item a:hover,
.nav-item a.active {
  color: var(--accent);
  background: rgba(255, 107, 53, 0.08);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
  z-index: 1001;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #1a1a2e;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: none; /* ボカシなし、写実的 */
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.5) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 8rem 2rem 4rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}

.hero-badge span {
  color: var(--sunset-coral);
  font-weight: 600;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
  color: #ffffff;
  text-shadow: 
    2px 2px 0 #000,
    -2px 2px 0 #000,
    2px -2px 0 #000,
    -2px -2px 0 #000,
    0 4px 12px rgba(0,0,0,0.5);
}

.hero h1 .gradient-text {
  color: #ffffff;
  background: none;
  -webkit-text-fill-color: #ffffff;
}

.hero-description {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: var(--gradient-sunset);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(255, 107, 53, 0.25);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================
   Stats Section
   ============================================ */
.stats-section {
  padding: 4rem 0;
  background: var(--bg-dark);
  color: var(--text-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item {
  padding: 1.5rem;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
  padding: var(--section-gap) 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(255, 107, 53, 0.1);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Feature Cards (About Section)
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 2rem;
  border: 1px solid var(--border-light);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-sunset);
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 126, 179, 0.1));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

.feature-link:hover {
  gap: 0.75rem;
}

/* ============================================
   News Section
   ============================================ */
.news-section {
  background: var(--bg-warm);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.news-card {
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition-smooth);
}

.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.news-date {
  display: flex;
  flex-direction: column;
  padding: 1rem 1.5rem;
  background: var(--gradient-sunset);
  color: white;
  text-align: center;
  min-width: 80px;
}

.news-date .day {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.news-date .month {
  font-size: 0.75rem;
  opacity: 0.9;
}

.news-content {
  padding: 1.5rem;
}

.news-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 107, 53, 0.1);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 0.75rem;
}

.news-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

.news-excerpt {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ============================================
   Topics Grid
   ============================================ */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.topic-card {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 2rem;
  border: 1px solid var(--border-light);
  transition: var(--transition-smooth);
}

.topic-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.2);
}

.topic-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 107, 53, 0.1);
  color: var(--accent);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.topic-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.topic-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.topic-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.875rem;
}

/* ============================================
   Footer
   ============================================ */
footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.footer-logo .logo-icon {
  width: 36px;
  height: 36px;
  font-size: 1rem;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer-column h4 {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 0.75rem;
}

.footer-column a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

.footer-column a:hover {
  color: var(--sunset-coral);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Page Styles (Sub Pages)
   ============================================ */
.page-hero {
  background: var(--bg-warm);
  padding: 8rem 0 4rem;
  text-align: center;
}

.page-hero .breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.page-hero .breadcrumb a {
  color: var(--accent);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.page-content {
  padding: 4rem 0;
}

.page-content .container {
  max-width: 800px;
}

.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: var(--text-primary);
}

.page-content h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}

.page-content p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.page-content ul, .page-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
  color: var(--text-secondary);
}

.page-content li {
  margin-bottom: 0.5rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .features-grid,
  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 4rem;
  }
  
  .header-inner {
    padding-inline: 1.25rem;
  }
  
  .hamburger {
    display: flex !important;
    width: 44px;
    height: 44px;
    justify-content: center;
    align-items: center;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-card);
    flex-direction: column;
    justify-content: flex-start;
    padding: 5rem 1.5rem 2rem;
    gap: 0;
    transition: var(--transition-smooth);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    right: 0 !important;
  }
  
  .nav-item {
    width: 100%;
  }
  
  .nav-item a {
    padding: 1rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-light);
  }
  
  .hero {
    min-height: auto;
    padding: 7rem 1.25rem 4rem;
  }
  
  .hero-content {
    padding: 2rem 0;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .features-grid,
  .topics-grid {
    grid-template-columns: 1fr;
  }
  
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .stat-item {
    padding: 1rem 0.5rem;
  }
  
  .stat-number {
    font-size: 1.5rem;
  }
  
  .stat-label {
    font-size: 0.75rem;
  }
}