/* 
 * ai-nude.buzz - 日本向けAIヌード生成サイトのスタイルシート
 * 紫とティールのカラースキームを使用
 */

:root {
  --primary-color: #7B1FA2; /* 紫色 */
  --secondary-color: #00796B; /* ティール色 */
  --accent-color: #FFC107; /* アクセントの黄色 */
  --dark-bg: #263238; /* 暗い背景色 */
  --light-text: #FFFFFF; /* 明るいテキスト色 */
  --dark-text: #212121; /* 暗いテキスト色 */
  --border-radius: 8px;
  --box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Noto Sans JP', 'Meiryo', sans-serif;
  line-height: 1.6;
  color: var(--dark-text);
  background-color: #F5F5F5;
  overflow-x: hidden;
}

/* コンテナスタイル */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* タイポグラフィ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  position: relative;
  padding-bottom: 0.5rem;
}

h2:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1rem;
}

/* 日本スタイルの区切り線 */
.jp-divider {
  height: 30px;
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%237B1FA2' fill-opacity='0.1'%3E%3Cpath d='M0 0h10v10H0V0zm10 10h10v10H10V10z'/%3E%3C/g%3E%3C/svg%3E");
  margin: 2rem 0;
}

/* リンク */
a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: var(--transition);
}

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

/* ボタン */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background-color: var(--primary-color);
  color: var(--light-text);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--box-shadow);
  text-transform: uppercase;
  font-size: 1rem;
}

.btn:hover {
  background-color: #6A1B9A; /* 少し暗い紫 */
  color: var(--light-text);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

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

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

.btn-accent {
  background-color: var(--accent-color);
  color: var(--dark-text);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.2rem;
}

/* ヘッダー */
header {
  background-color: #FFFFFF;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-left: 10px;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 2rem;
}

nav ul li a {
  font-weight: 500;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  transition: var(--transition);
}

nav ul li a:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--primary-color);
  font-size: 1.8rem;
  cursor: pointer;
}

/* ヒーローセクション */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--light-text);
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.1;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 3rem;
  color: var(--light-text);
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* 特徴セクション */
.features {
  padding: 5rem 0;
  background-color: #FFFFFF;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  display: inline-block;
}

.section-header h2:after {
  left: 50%;
  transform: translateX(-50%);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  color: #666;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background-color: #FFFFFF;
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--box-shadow);
  text-align: center;
  transition: var(--transition);
  border-top: 4px solid var(--primary-color);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.feature-icon {
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.feature-card h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* 使い方セクション */
.how-it-works {
  padding: 5rem 0;
  background-color: #F9F9F9;
  position: relative;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  counter-reset: step-counter;
}

.step {
  background-color: #FFFFFF;
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--box-shadow);
  position: relative;
  counter-increment: step-counter;
}

.step::before {
  content: counter(step-counter);
  position: absolute;
  top: -20px;
  left: 20px;
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.5rem;
}

.step-icon {
  display: block;
  margin: 0 auto 1rem;
  color: var(--secondary-color);
}

/* FAQ セクション */
.faq {
  padding: 5rem 0;
  background-color: #FFFFFF;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid #EEE;
  padding-bottom: 1.5rem;
}

.faq-item h3 {
  cursor: pointer;
  padding: 1rem 0;
  position: relative;
  padding-right: 30px;
  color: var(--secondary-color);
}

.faq-item h3::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--primary-color);
}

.faq-item.active h3::after {
  content: '−';
}

.faq-item p {
  display: none;
  padding: 0.5rem 0 1rem;
  color: #666;
}

.faq-item.active p {
  display: block;
}

/* CTA セクション */
.cta {
  padding: 5rem 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--light-text);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.1;
}

.cta h2 {
  color: var(--light-text);
}

.cta h2:after {
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-color);
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.cta-buttons {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

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

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo svg {
  margin-bottom: 1rem;
}

.footer-links h4 {
  color: var(--light-text);
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
  font-size: 1.2rem;
}

.footer-links h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background-color: var(--accent-color);
}

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

.footer-links ul li {
  margin-bottom: 0.8rem;
}

.footer-links ul li a {
  color: #AAA;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--light-text);
  padding-left: 5px;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.9rem;
  color: #AAA;
}

/* 日本的な装飾要素 */
.jp-pattern {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M0 0h10v10H0V0zm10 10h10v10H10V10z'/%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.1;
  z-index: 1;
}

/* レスポンシブデザイン */
@media (max-width: 991px) {
  h1 {
    font-size: 2.2rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  nav {
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
  }
  
  nav.active {
    max-height: 300px;
  }
  
  nav ul {
    flex-direction: column;
    padding: 1rem 0;
  }
  
  nav ul li {
    margin-left: 0;
    margin-bottom: 1rem;
  }
  
  .hero {
    padding: 7rem 0 3rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .steps, .features-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons, .cta-buttons {
    flex-direction: column;
    gap: 1rem;
  }
  
  .btn {
    width: 100%;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .container {
    width: 95%;
  }
  
  .feature-card, .step {
    padding: 1.5rem;
  }
  
  .section-header {
    margin-bottom: 2rem;
  }
}