/* Modern Base Styles - Inspired by Manga Million */
:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-hover: #f5f6f7;
  --color-text: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-accent: #e63946;
  --color-accent-hover: #d62839;
  --color-primary: #1d3557;
  --color-primary-light: #457b9d;
  --color-border: #e5e7eb;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Noto Sans', 'Noto Sans JP', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Background Pattern */
.bg-pattern {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(230, 57, 70, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(29, 53, 87, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

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

a:hover {
  color: var(--color-accent-hover);
}

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

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  gap: var(--spacing-md);
  border: 1px solid var(--color-border);
  position: sticky;
  top: var(--spacing-md);
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  transition: var(--transition);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-text-wrapper {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 24px;
  font-weight: 900;
  color: var(--color-text);
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.version {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-bg-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  display: inline-block;
  margin-top: 2px;
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-select {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
  font-family: inherit;
}

.lang-select:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface-hover);
}

.lang-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
}

/* Hero Section */
.hero {
  margin-top: var(--spacing-2xl);
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--color-bg-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 20px;
  margin-bottom: var(--spacing-md);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-badge span {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.hero-title {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 900;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  font-weight: 400;
  max-width: 500px;
  margin: 0 auto;
}

/* App Card */
.app-card {
  margin-top: var(--spacing-xl);
  background: var(--color-surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: white;
}

.card-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.card-icon svg {
  width: 100%;
  height: 100%;
  stroke: white;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.card-content {
  padding: var(--spacing-lg);
}

.card-content p {
  background: var(--color-bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-lg);
  line-height: 1.9;
  font-size: 14px;
  color: var(--color-text);
}

.card-content a {
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.card-content a:hover {
  color: var(--color-accent-hover);
}

/* Version Notes */
.version-note {
  background: var(--color-bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--color-border);
}

.version-note h4 {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.version-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.version-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.version-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  border: 1px solid var(--color-border);
  min-width: 80px;
  text-align: center;
}

.version-value {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
}

/* Action Buttons */
.action-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-xl);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  min-height: 56px;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  font-weight: 600;
  font-size: 14px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-create {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  border: none;
  color: white;
}

.btn-create:hover {
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
}

.btn-create .btn-icon {
  stroke: white;
}

.btn-playstore {
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
}

.btn-playstore:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.playstore-badge {
  height: 56px;
  width: auto;
  transition: var(--transition);
  border-radius: var(--border-radius-sm);
}

.btn-apk {
  background: var(--color-primary);
  border: none;
  color: white;
}

.btn-apk:hover {
  background: var(--color-primary-light);
}

.btn-apk .btn-icon {
  stroke: white;
}

/* Showcase Section - Horizontal Scroll */
.showcase-section {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg-secondary);
}

.section-title {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  text-align: center;
  color: var(--color-text);
  letter-spacing: -0.5px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: 0.75rem auto 0;
  border-radius: 2px;
}

.showcase {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent) #e5e7eb;
  padding: var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) + 8px);
  max-width: 100%;
}

.showcase::-webkit-scrollbar {
  height: 8px;
}

.showcase::-webkit-scrollbar-track {
  background: #e5e7eb;
  border-radius: 4px;
  margin: 0 var(--spacing-md);
}

.showcase::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: 4px;
  transition: background 0.3s ease;
}

.showcase::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-hover);
}

.showcase-item {
  flex: 0 0 auto;
  width: 220px;
  scroll-snap-align: center;
  position: relative;
  background: #fff;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  aspect-ratio: 9 / 16;
}

.showcase-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
  transition: var(--transition);
}

.showcase-item:hover img {
  transform: scale(1.03);
}

.showcase-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.4) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.showcase-item:hover .showcase-overlay {
  opacity: 1;
}

@media (max-width: 768px) {
  .showcase-item {
    width: 180px;
  }
}

@media (max-width: 480px) {
  .showcase-item {
    width: 160px;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 1.5rem;
  }
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.feature-card {
  background: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

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

.feature-icon-wrapper {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon {
  font-size: 28px;
}

.feature-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Footer */
.footer {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
}

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

.footer-logo img {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--spacing-md);
  opacity: 0.8;
}

.footer-logo p {
  color: var(--color-text-muted);
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-heading {
  color: var(--color-text);
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.link-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
}

.link-group a {
  color: var(--color-text-muted);
  font-size: 13px;
  transition: var(--transition);
}

.link-group a:hover {
  color: var(--color-accent);
}

.copyright {
  color: var(--color-text-muted);
  font-size: 11px;
  text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }

  .header {
    flex-direction: column;
    text-align: center;
    position: relative;
    top: 0;
  }

  .logo-container {
    flex-direction: column;
    align-items: center;
  }

  .lang-switcher {
    width: 100%;
  }

  .lang-select {
    width: 100%;
  }

  .action-buttons {
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
  }

  .showcase-item img {
    width: 120px;
    height: 210px;
  }

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

  .link-group {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .card-header {
    flex-direction: column;
    text-align: center;
  }

  .version-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero-title {
    font-size: 24px;
  }

  .app-card {
    border-radius: var(--border-radius);
  }

  .card-content {
    padding: var(--spacing-md);
  }

  .card-content p {
    padding: var(--spacing-md);
    font-size: 13px;
  }
}

/* Loading State */
.loading {
  opacity: 0.5;
  pointer-events: none;
}

/* Smooth fade-in animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.container {
  animation: fadeIn 0.6s ease-out;
}