@charset "UTF-8";

/* ============================================
   CSS Variables (07_design_system.md)
   ============================================ */
:root {
  /* Primary */
  --color-primary: #c21c08;
  --color-primary-dark: #a01606;
  --color-primary-light: #FCE7E5;

  /* Neutral */
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-text-tertiary: #999999;
  --color-border: #dddddd;
  --color-bg: #f8f8f8;
  --color-surface: #ffffff;
  --color-dark: #222222;
  --color-dark-text: #f3f3f3;

  /* Semantic */
  --color-success: #28a745;
  --color-error: #dc3545;
  --color-warning: #ffc107;
  --color-info: #7CADB6;

  /* Font */
  --font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'メイリオ', Meiryo, sans-serif;

  /* Typography */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing (8px grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Layout */
  --container-max: 1024px;
  --container-padding: 20px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
}

ul, ol {
  list-style: none;
}

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

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
}

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

.section {
  padding: var(--space-8) 0;
}

.section-alt {
  background-color: var(--color-surface);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
}

.page-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
}

.section-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-5);
}

.lead {
  font-size: var(--text-lg);
  line-height: 1.6;
}

/* ============================================
   Sticky Header Wrapper
   ============================================ */
.site-header-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow 0.2s;
}

.site-header-wrap.is-scrolled {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* ============================================
   Header
   ============================================ */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

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

.header-logo {
  text-decoration: none;
  color: var(--color-text);
}

.header-logo:hover {
  color: var(--color-text);
}

.header-logo-img {
  height: auto;
  width: auto;
}

.header-logo-pc {
  height: 75px;
}

.header-logo-sp {
  display: none;
}

/* ============================================
   Navigation
   ============================================ */
.site-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.nav-list {
  display: flex;
}

.nav-list li a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-list li a:hover,
.nav-list li a.is-active {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 3px;
  text-underline-offset: 4px;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  width: 40px;
  height: 40px;
  position: relative;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px auto;
  transition: transform 0.3s, opacity 0.3s;
}

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
  padding: var(--space-3) 0;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

.breadcrumb span {
  margin: 0 var(--space-2);
}

.breadcrumb-current {
  color: var(--color-text-tertiary);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
  line-height: 1.4;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 16px 32px;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(194, 28, 8, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  padding: 14px 30px;
  border: 2px solid var(--color-primary);
}

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

.btn-amazon {
  background-color: #FF9900;
  color: #111111;
  padding: 16px 32px;
}

.btn-amazon:hover {
  background-color: #e68a00;
  color: #111111;
  box-shadow: 0 2px 8px rgba(255, 153, 0, 0.3);
}

.btn-small {
  font-size: var(--text-sm);
  padding: 10px 20px;
}

/* ============================================
   Card
   ============================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-5);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

/* ============================================
   Table
   ============================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  background-color: var(--color-dark);
  color: var(--color-dark-text);
  padding: var(--space-4);
  text-align: left;
  font-weight: 700;
  font-size: var(--text-sm);
}

.data-table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

.data-table tr:nth-child(odd) td {
  background-color: var(--color-surface);
}

.data-table tr:nth-child(even) td {
  background-color: var(--color-bg);
}

/* ============================================
   Accordion (FAQ)
   ============================================ */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

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

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

.accordion-header {
  background: var(--color-bg);
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-lg);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-family);
  color: var(--color-text);
}

.accordion-header:hover {
  background: var(--color-primary-light);
}

.accordion-icon {
  font-size: var(--text-base);
  color: var(--color-primary);
  transition: transform 0.3s;
  flex-shrink: 0;
  margin-left: var(--space-4);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary-light);
}

.accordion-item.is-open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  background: var(--color-surface);
  padding: var(--space-5);
  line-height: 1.8;
  display: none;
}

.accordion-item.is-open .accordion-body {
  display: block;
}

/* ============================================
   Form
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.form-required {
  color: var(--color-error);
  margin-left: var(--space-1);
  font-size: var(--text-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  font-family: var(--font-family);
  font-size: var(--text-base);
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-info);
  box-shadow: 0 0 0 3px rgba(124, 173, 182, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error-input {
  border-color: var(--color-error);
}

.form-error-input:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.2);
}

.form-error-message {
  color: var(--color-error);
  font-size: var(--text-sm);
  margin-top: var(--space-1);
}

.form-hint {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  margin-top: var(--space-1);
}

.form-radio-group,
.form-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-2);
}

.form-radio-group label,
.form-checkbox-group label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 400;
  cursor: pointer;
}

.has-error .form-input,
.has-error .form-textarea,
.has-error .form-select {
  border-color: var(--color-error);
}

.has-error .form-input:focus,
.has-error .form-textarea:focus,
.has-error .form-select:focus {
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.2);
}

.form-error {
  color: var(--color-error);
  font-size: var(--text-sm);
  margin-top: var(--space-1);
}

/* ============================================
   CTA Banner
   ============================================ */
.cta-banner {
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-6);
  text-align: center;
}

.cta-banner-text {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

/* ============================================
   Alert
   ============================================ */
.alert {
  padding: var(--space-4);
  border-radius: 4px;
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  border-left: 4px solid;
}

.alert-success {
  background: #e8f5e9;
  border-left-color: var(--color-success);
  color: #1b5e20;
}

.alert-error {
  background: #fce4ec;
  border-left-color: var(--color-error);
  color: #b71c1c;
}

.alert-warning {
  background: #fff8e1;
  border-left-color: var(--color-warning);
  color: #e65100;
}

.alert-info {
  background: #e0f2f1;
  border-left-color: var(--color-info);
  color: #004d40;
}

/* ============================================
   Price
   ============================================ */
.price-display {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.price-display .tax {
  font-size: var(--text-base);
  font-weight: 400;
}

/* ============================================
   Hero (First View)
   ============================================ */
.hero {
  background: var(--color-dark);
  color: var(--color-dark-text);
  padding: 6px 0 var(--space-9);
  text-align: center;
}

.hero-title {
  font-size: var(--text-4xl);
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: #ffffff;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.hero-visual {
  max-width: 100%;
  margin: 0 auto var(--space-6);
}

.hero-visual img {
  width: 100%;
  height: auto;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Feature Grid (3 columns)
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.feature-grid .card {
  text-align: center;
}

.feature-grid .card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

/* ============================================
   Feature Item (image + text)
   ============================================ */
.feature-item {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.feature-item-image {
  flex-shrink: 0;
  width: 200px;
}

.feature-item-body h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

/* ============================================
   Scroll-triggered Highlight
   ============================================ */
.highlight-on-scroll {
  background-image: linear-gradient(transparent 60%, #ffe066 60%);
  background-size: 0% 100%;
  background-repeat: no-repeat;
  transition: background-size 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.highlight-on-scroll.is-highlighted {
  background-size: 100% 100%;
}

/* ============================================
   Checklist
   ============================================ */
.checklist {
  list-style: none;
}

.checklist li {
  padding: var(--space-3) 0;
  padding-left: var(--space-6);
  position: relative;
  font-size: var(--text-lg);
  border-bottom: 1px dotted var(--color-border);
}

.checklist li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* ============================================
   Voice Card (review)
   ============================================ */
.voice-card {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: var(--space-5);
}

.voice-card-image {
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
}

.voice-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.voice-card-body h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.voice-card-body .voice-meta {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

/* ============================================
   Point List
   ============================================ */
.point-list li {
  padding: var(--space-2) 0;
  padding-left: var(--space-5);
  position: relative;
}

.point-list li::before {
  content: "\25C6";
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* ============================================
   Notice Box
   ============================================ */
.notice-box {
  border: 2px solid var(--color-error);
  background: var(--color-primary-light);
  border-radius: 8px;
  padding: var(--space-5);
}

.notice-box p {
  margin-bottom: var(--space-3);
}

.notice-box p:last-child {
  margin-bottom: 0;
}

/* ============================================
   Concern Cards (recommend)
   ============================================ */
.concern-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.concern-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-5);
  text-align: center;
  font-size: var(--text-lg);
}

/* ============================================
   QA Section Header
   ============================================ */
.qa-section-title {
  font-size: var(--text-lg);
  padding: var(--space-4) 0;
  margin-top: var(--space-6);
  margin-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-primary);
}

/* ============================================
   Legal Text
   ============================================ */
.legal-text h3 {
  font-size: var(--text-lg);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.legal-text p {
  margin-bottom: var(--space-4);
}

/* ============================================
   Confirm Table
   ============================================ */
.confirm-table {
  width: 100%;
}

.confirm-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  font-weight: 700;
  width: 30%;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}

.confirm-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

/* ============================================
   Section Links (Next Step)
   ============================================ */
.section-links {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Utility
   ============================================ */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

/* ============================================
   Placeholder image
   ============================================ */
.placeholder-image {
  background: #e0e0e0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: var(--text-sm);
  border-radius: 4px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--color-dark);
  color: var(--color-dark-text);
  padding: var(--space-8) 0 var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}

.footer-col h4 {
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.footer-col ul li {
  margin-bottom: var(--space-2);
}

.footer-col ul li a {
  color: var(--color-dark-text);
  text-decoration: none;
  font-size: var(--text-sm);
  opacity: 0.8;
  transition: opacity 0.2s;
}

.footer-col ul li a:hover {
  opacity: 1;
  color: var(--color-dark-text);
}

.footer-bottom {
  border-top: 1px dotted #434343;
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-company {
  font-size: var(--text-xs);
  opacity: 0.7;
}

.footer-sns a {
  color: var(--color-dark-text);
  text-decoration: none;
  font-size: var(--text-sm);
  opacity: 0.8;
}

.footer-sns a:hover {
  opacity: 1;
}

/* ============================================
   Responsive: Tablet (768px)
   ============================================ */
@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  /* SP: Logo switch (PC → SP) */
  .header-logo-pc {
    display: none;
  }

  .header-logo-sp {
    display: block;
    height: 48px;
  }

  /* SP: Unified sticky bar (header + nav merged into one row) */
  .site-header-wrap {
    position: sticky;
    top: 0;
    z-index: 100;
  }

  .site-nav {
    background: none;
    border-bottom: none;
  }

  .site-nav .container {
    position: static;
    padding: 0;
  }

  /* Navigation: hamburger in header-action */
  .nav-toggle {
    display: block;
  }

  .header-action {
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  /* Compact mode: scroll down → hamburger only */
  .site-header-wrap.is-scrolled .header-logo {
    display: none;
  }

  .site-header-wrap.is-scrolled .header-action .btn {
    display: none;
  }

  .site-header-wrap.is-scrolled .header-inner {
    justify-content: flex-end;
  }

  .site-header-wrap.is-scrolled .site-header {
    padding: var(--space-2) 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    position: absolute;
    top: 100%;
    left: var(--container-padding);
    right: var(--container-padding);
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li a {
    border-left: 3px solid transparent;
    padding: var(--space-3) var(--space-5);
  }

  .nav-list li a:hover,
  .nav-list li a.is-active {
    border-left-color: var(--color-primary);
    text-decoration: none;
  }

  .nav-list li:not(:last-child) {
    border-bottom: 1px solid var(--color-border);
  }

  /* Feature grid */
  .feature-grid {
    grid-template-columns: 1fr;
  }

  /* Feature item */
  .feature-item {
    flex-direction: column;
  }

  .feature-item-image {
    width: 100%;
    max-width: 300px;
  }

  /* Voice card */
  .voice-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  /* Concern grid */
  .concern-grid {
    grid-template-columns: 1fr;
  }

  /* Hero actions */
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  /* Table responsive */
  .data-table-responsive thead {
    display: none;
  }

  .data-table-responsive tr {
    display: block;
    margin-bottom: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
  }

  .data-table-responsive td {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
  }

  .data-table-responsive td::before {
    content: attr(data-label);
    font-weight: 700;
    margin-right: var(--space-4);
  }
}

/* ============================================
   Responsive: Smartphone (480px)
   ============================================ */
@media (max-width: 480px) {
  :root {
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.375rem;
  }

  .header-inner {
    flex-direction: row;
    align-items: center;
    gap: var(--space-2);
  }

  .section {
    padding: var(--space-7) 0;
  }

  .btn-primary,
  .btn-amazon {
    width: 100%;
  }

  .header-action .btn {
    width: auto;
  }
}