/* CSS Variables */
:root {
  --primary: #FF7043;
  --primary-dark: #E64A19;
  --primary-light: #FFCCBC;
  --background: #FFF8F5;
  --background-card: #FFFFFF;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-disabled: #BDBDBD;
  --success: #4CAF50;
  --error: #F44336;
  --border: #E0E0E0;

  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-dark);
}

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

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 248, 245, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
  color: var(--text-primary);
}

.logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: 32px;
}

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

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

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 6px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  padding: calc(var(--header-height) + 80px) 0 80px;
  text-align: center;
}

.hero-content {
  max-width: 600px;
  margin: 0 auto;
}

.hero-icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  margin-bottom: 32px;
  box-shadow: 0 8px 32px rgba(255, 112, 67, 0.3);
}

.hero h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero .tagline {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.download-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--text-primary);
  color: white;
  border-radius: 12px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.download-btn:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.download-btn svg {
  width: 24px;
  height: 24px;
}

/* Features Section */
.features {
  padding: 80px 0;
  background: var(--background-card);
}

.section-title {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  text-align: center;
  padding: 32px 24px;
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* Screenshots Section */
.screenshots {
  padding: 80px 0;
}

.screenshots-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 20px 0;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.screenshots-scroll::-webkit-scrollbar {
  display: none;
}

.screenshot-item {
  flex-shrink: 0;
  scroll-snap-align: center;
}

.screenshot-item img {
  width: 280px;
  border-radius: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* CTA Section */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
  color: white;
}

.cta h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta p {
  font-size: 18px;
  margin-bottom: 32px;
  opacity: 0.9;
}

.cta .download-btn {
  background: white;
  color: var(--primary);
}

.cta .download-btn:hover {
  color: var(--primary-dark);
}

/* Footer */
.footer {
  padding: 48px 0;
  background: var(--text-primary);
  color: white;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.footer-logo img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.footer-links a:hover {
  color: white;
}

.copyright {
  width: 100%;
  text-align: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

/* Legal Pages */
.legal-page {
  padding: calc(var(--header-height) + 48px) 0 80px;
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--background-card);
  padding: 48px;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.legal-content h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.legal-content .last-updated {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
}

.legal-content h2 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.legal-content p,
.legal-content ul,
.legal-content ol {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.legal-content ul,
.legal-content ol {
  padding-left: 24px;
}

.legal-content li {
  margin-bottom: 8px;
}

/* Contact Page */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 32px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--background);
  border-radius: 12px;
}

.contact-item svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 4px;
}

.contact-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 0;
}

.contact-item a {
  display: inline-block;
  margin-top: 8px;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--background-card);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  }

  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    padding: 12px 0;
    font-size: 18px;
    border-bottom: 1px solid var(--border);
  }

  .nav a:last-child {
    border-bottom: none;
  }

  .menu-toggle {
    display: block;
    z-index: 1001;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

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

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .hero {
    padding: calc(var(--header-height) + 48px) 0 48px;
  }

  .hero h1 {
    font-size: 28px;
  }

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

  .features-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 32px;
  }

  .cta h2 {
    font-size: 24px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .legal-content {
    padding: 24px;
  }

  .legal-content h1 {
    font-size: 24px;
  }
}