/**
 * 肝吉くん サポートサイト スタイルシート
 *
 * アプリのカラーパレットに準拠しつつ、
 * 清潔感のあるミニマルデザインを実現
 */

/* ========================================
   CSS Variables
   ======================================== */
:root {
  /* アプリのカラーパレット */
  --color-primary: #4A90E2;
  --color-primary-dark: #357ABD;
  --color-success: #7ED321;
  --color-warning: #F5A623;
  --color-danger: #D0021B;

  /* サイト用カラー（落ち着いたグリーン系） */
  --color-accent: #1a5c3a;
  --color-accent-light: #2d8a5a;

  /* ベースカラー */
  --color-background: #F8F9FA;
  --color-surface: #FFFFFF;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-border: #E5E5E5;

  /* フォント */
  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* スペーシング */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* ボーダー */
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* シャドウ */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

  /* トランジション */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;

  /* レイアウト */
  --container-max-width: 1200px;
  --header-height: 64px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

ul, ol {
  list-style-position: inside;
}

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

.main {
  flex: 1;
  padding-top: var(--header-height);
}

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.logo-sub {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  padding: var(--spacing-sm) 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition-fast);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background-color: var(--color-text);
  color: var(--color-surface);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

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

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md) var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}

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

.footer-company {
  margin-bottom: var(--spacing-md);
}

.footer-company a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-company a:hover {
  color: var(--color-surface);
}

.footer-copyright {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
}

.btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

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

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

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

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.125rem;
}

.btn-icon {
  font-size: 1.2em;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  color: var(--color-surface);
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.hero-subtitle {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.8;
}

.hero-badges {
  margin-top: var(--spacing-xl);
}

.badge-placeholder {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
}

/* ========================================
   Section Styles
   ======================================== */
section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  color: var(--color-text);
}

/* ========================================
   Features Section
   ======================================== */
.features {
  background-color: var(--color-surface);
}

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

.feature-card {
  background-color: var(--color-background);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.feature-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

/* ========================================
   Gallery Section
   ======================================== */
.gallery {
  background-color: var(--color-background);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.gallery-item {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-item:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.gallery-item img {
  width: 100%;
  height: auto;
  display: block;
}

/* ========================================
   Target Section
   ======================================== */
.target {
  background-color: var(--color-surface);
}

.target-list {
  max-width: 600px;
  margin: 0 auto;
  list-style: none;
}

.target-list li {
  padding: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
  position: relative;
  border-bottom: 1px solid var(--color-border);
  font-size: 1.0625rem;
}

.target-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: bold;
}

.target-list li:last-child {
  border-bottom: none;
}

/* ========================================
   Disclaimer Section
   ======================================== */
.disclaimer {
  background-color: var(--color-background);
}

.disclaimer-content {
  max-width: 800px;
  margin: 0 auto;
}

.disclaimer-item {
  background-color: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid var(--color-border);
}

.disclaimer-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.disclaimer-item p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin: 0;
}

.disclaimer-important {
  border-left-color: var(--color-danger);
  background-color: #FFF5F5;
}

.disclaimer-important h3 {
  color: var(--color-danger);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
  background-color: var(--color-surface);
  text-align: center;
}

.cta-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.cta-desc {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
  background-color: var(--color-surface);
}

.contact-intro {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text-light);
}

.contact-form-wrapper {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.contact-info {
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
  background-color: var(--color-background);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
}

.contact-info h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.contact-info-list {
  list-style: none;
}

.contact-info-list li {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-info-list li:last-child {
  border-bottom: none;
}

.contact-info-list strong {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.contact-info-list span {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.contact-notes {
  max-width: 600px;
  margin: 0 auto;
  background-color: var(--color-background);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
}

.contact-notes h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.contact-notes ul {
  list-style: disc;
  padding-left: var(--spacing-lg);
}

.contact-notes li {
  margin-bottom: var(--spacing-sm);
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-section {
  background-color: var(--color-surface);
}

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

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) 0;
  cursor: pointer;
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-text);
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  margin-left: auto;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
  content: '−';
}

.faq-q {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-accent);
  color: var(--color-surface);
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-answer {
  padding: 0 0 var(--spacing-lg) calc(28px + var(--spacing-md));
  color: var(--color-text-light);
}

.faq-answer p {
  margin-bottom: var(--spacing-md);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer ul {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-lg);
}

.faq-answer li {
  margin-bottom: var(--spacing-xs);
}

.faq-cta {
  text-align: center;
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

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

/* ========================================
   Legal Document Section
   ======================================== */
.legal-section {
  background-color: var(--color-surface);
  padding: var(--spacing-xl) 0;
}

.legal-header {
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.back-link {
  font-size: 0.9375rem;
}

.last-updated {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.legal-document {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  background-color: var(--color-background);
  border-radius: var(--border-radius-lg);
}

.legal-document h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-accent);
}

.legal-document h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.legal-document h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

.legal-document p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.legal-document ul,
.legal-document ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
}

.legal-document li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.7;
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: 0;
    box-shadow: var(--shadow-md);
  }

  .nav-list.active {
    display: flex;
  }

  .nav-link {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
  }

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

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .legal-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  section {
    padding: var(--spacing-2xl) 0;
  }

  .hero {
    padding: var(--spacing-2xl) 0;
  }

  .hero-title {
    font-size: 1.5rem;
  }

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

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
  }

  .footer-nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .faq-question {
    font-size: 1rem;
  }

  .faq-answer {
    padding-left: 0;
  }

  .legal-document {
    padding: var(--spacing-md);
  }
}

/* ========================================
   Accessibility
   ======================================== */

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
  }

  .btn-primary {
    border: 2px solid #000000;
  }
}

/* Print styles */
@media print {
  .header,
  .footer,
  .nav-toggle,
  .cta,
  .btn {
    display: none;
  }

  .main {
    padding-top: 0;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }
}