/* ==========================================================================
   Logo Maker - Official Website Styles
   Design System: Atelier Style (Paper, Ink, Stamp Red)
   ========================================================================== */

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  /* Color Palette */
  --color-paper: #FAF8F5;       /* 温かみのあるオフホワイト（紙面） */
  --color-paper-dark: #F2EFEA;  /* やや暗いオフホワイト（カード背景など） */
  --color-ink: #1C1B1A;         /* 柔らかい墨黒（テキスト） */
  --color-ink-light: #54524F;   /* 薄い墨色（サブテキスト） */
  --color-stamp: #D94B36;       /* 鮮やかな朱赤（アクセントカラー） */
  --color-stamp-hover: #C53A26; /* 朱赤のホバー色 */
  --color-border: #E0DDD7;      /* 優しい境界線グレー */
  
  /* Typography */
  --font-primary: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  
  /* Spacing & Layout */
  --container-width: 800px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-paper);
  color: var(--color-ink);
  line-height: 1.75;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Base Layout */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

header {
  background-color: rgba(250, 248, 245, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition-fast);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-ink);
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* Navigation */
.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  align-items: center;
}

/* ハンバーガーメニューボタン */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 110;
}

.menu-toggle .bar {
  width: 100%;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 2px;
  transition: var(--transition-normal);
  transform-origin: center;
}

/* 言語切替ボタン */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--color-ink-light);
  border: 1.5px solid var(--color-border);
  border-radius: 20px;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.lang-switch:hover {
  color: var(--color-stamp);
  border-color: var(--color-stamp);
  background-color: rgba(217, 75, 54, 0.05);
}

.lang-switch-icon {
  font-size: 0.85rem;
  line-height: 1;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-ink-light);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition-fast);
  padding: var(--spacing-xs) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-stamp);
  transition: var(--transition-fast);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--color-ink);
  font-weight: 700;
}

.nav-links a.active::after {
  width: 100%;
  background-color: var(--color-ink);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 30px;
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-stamp);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(217, 75, 54, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-stamp-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(217, 75, 54, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border: 2px solid var(--color-ink);
}

.btn-secondary:hover {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero-logo {
  width: 120px;
  height: 120px;
  border-radius: 28px;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
}

.hero h1 span {
  color: var(--color-stamp);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-ink-light);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

/* Sections */
.section {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 30px;
  height: 3px;
  background-color: var(--color-stamp);
  margin: var(--spacing-xs) auto 0;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

@media (min-width: 576px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.feature-card {
  background-color: var(--color-paper-dark);
  padding: var(--spacing-lg) var(--spacing-md);
  border-radius: 16px;
  border: 1px solid var(--color-border);
  transition: var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.03);
}

.feature-icon-wrapper {
  color: var(--color-stamp);
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
}

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

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-ink-light);
  line-height: 1.6;
}

/* Store Badge Mockup */
.store-badges {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.store-badge-apple {
  background: #000000;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.6rem 1.5rem;
  border-radius: 12px;
  text-decoration: none;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  transition: var(--transition-fast);
}

.store-badge-apple:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

.store-badge-apple svg {
  width: 24px;
  height: 24px;
  fill: #FFFFFF;
}

.store-badge-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.store-badge-text .small {
  font-size: 0.65rem;
  text-transform: uppercase;
}

.store-badge-text .big {
  font-size: 1.1rem;
  font-weight: 600;
}

/* Legal Documents Style (Terms & Privacy) */
.legal-content {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-xl);
}

.legal-contact-btn-wrapper {
  margin: var(--spacing-md) 0;
}

.legal-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.legal-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.legal-meta {
  font-size: 0.9rem;
  color: var(--color-ink-light);
}

.legal-section {
  margin-bottom: var(--spacing-lg);
}

.legal-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-ink);
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.legal-section h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.35rem;
  background-color: var(--color-stamp);
  border-radius: 2px;
}

.legal-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: var(--spacing-md) 0 var(--spacing-xs);
}

.legal-section p {
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
  color: var(--color-ink);
  text-align: justify;
}

.legal-section ul, .legal-section ol {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.legal-section li {
  margin-bottom: var(--spacing-xs);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.legal-table th, .legal-table td {
  padding: 0.75rem var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.legal-table th {
  background-color: var(--color-paper-dark);
  font-weight: 700;
}

.legal-table tr:last-child td {
  border-bottom: none;
}

.highlight-box {
  background-color: var(--color-paper-dark);
  border-left: 4px solid var(--color-stamp);
  padding: var(--spacing-md);
  border-radius: 0 8px 8px 0;
  margin: var(--spacing-md) 0;
}

.highlight-box p {
  margin-bottom: 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-ink-light);
}

/* Contact Footer Section */
.footer-cta {
  background-color: var(--color-paper-dark);
  text-align: center;
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
}

.footer-cta h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.footer-cta p {
  color: var(--color-ink-light);
  margin-bottom: var(--spacing-md);
}

/* Footer */
footer {
  background-color: var(--color-ink);
  color: var(--color-paper);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  font-size: 0.85rem;
}

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

@media (min-width: 576px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.footer-links a {
  color: var(--color-paper-dark);
  text-decoration: none;
  opacity: 0.8;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-stamp);
}

.copyright {
  opacity: 0.6;
}

/* Micro-animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Responsive adjustments */
@media (max-width: 576px) {
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .btn {
    padding: 0.65rem 1.5rem;
    font-size: 0.95rem;
  }
  
  .header-inner {
    height: 60px;
  }
  
  .brand-name {
    font-size: 1.1rem;
  }

  /* モバイルでのナビゲーションとハンバーガー */
  .menu-toggle {
    display: flex;
  }

  /* ハンバーガーのアニメーション */
  .menu-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

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

  .menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    height: calc(100vh - 60px);
    background-color: rgba(250, 248, 245, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-xl);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
    border-top: 1px solid var(--color-border);
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    display: inline-block;
    font-size: 1.25rem;
    font-weight: 700;
    padding: var(--spacing-sm) 0;
    color: var(--color-ink);
  }

  .nav-links a::after {
    display: none; /* 下線を非表示 */
  }

  .header-actions {
    gap: var(--spacing-sm);
  }

  .lang-switch {
    font-size: 0.8rem;
    padding: 0.3rem 0.6rem;
    margin-top: 0;
  }

  /* モバイル表示時の余白・タイポグラフィの最適化 */
  .container {
    padding: 0 1.25rem;
  }

  .legal-content {
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-lg);
  }

  .legal-header {
    margin-bottom: var(--spacing-lg);
  }

  .legal-header h1 {
    font-size: 1.5rem;
    line-height: 1.4;
  }

  .legal-section {
    margin-bottom: var(--spacing-lg);
  }

  .legal-section h2 {
    font-size: 1.15rem;
    line-height: 1.4;
    padding-bottom: 6px;
    margin-bottom: var(--spacing-sm);
  }

  .legal-section h2::before {
    height: 1.15rem;
  }

  .legal-section p {
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
  }

  .legal-section ul, .legal-section ol {
    margin-left: 1.25rem;
    margin-bottom: var(--spacing-sm);
    padding-left: 0;
  }

  .legal-section li {
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 0.4rem;
  }

  .highlight-box {
    padding: 1rem;
    margin: 1.25rem 0;
    border-radius: 6px;
  }

  .highlight-box p {
    font-size: 0.85rem;
    line-height: 1.7;
  }

  .table-responsive {
    margin: var(--spacing-sm) 0;
    border-radius: 6px;
  }

  .legal-table {
    font-size: 0.8rem;
  }

  .legal-table th, .legal-table td {
    padding: 0.5rem var(--spacing-xs);
    line-height: 1.4;
  }

  /* モバイル表示時のフッターメニュー縦並び化 */
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
  }
}