/* ============================================================
   愛管3Dスキャン コラムサイト — CSS Design System
   カラー: 愛管3Dスキャンページに準拠
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --color-red: #CB2D2E;
  --color-red-dark: #a82324;
  --color-red-light: #f5e0e0;
  --color-blue-gray: #5E8089;
  --color-blue-gray-dark: #4a6870;
  --color-gold: #937343;
  --color-gold-light: #b8975f;
  --color-bg: #f5f5f3;
  --color-bg-alt: #e8e7e4;
  --color-text: #333;
  --color-text-light: #666;
  --color-white: #fff;
  --color-border: #ddd;

  --font-body: 'Noto Sans JP', 'Yu Gothic', sans-serif;
  --font-heading: 'Noto Sans JP', 'Yu Gothic', sans-serif;
  --font-en: 'Roboto', sans-serif;

  --max-width: 860px;
  --header-height: 70px;
  --sidebar-width: 50px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  padding-right: var(--sidebar-width);
}

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

a:hover {
  opacity: 0.8;
}

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

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 100%;
  gap: 24px;
}

.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 40px;
  width: auto;
}

.logo-3d small {
  font-size: 0.55rem;
  line-height: 1.1;
  display: inline-block;
  vertical-align: middle;
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--color-text-light);
}

.header-nav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  flex-wrap: wrap;
}

.nav-link {
  font-size: 0.82rem;
  color: var(--color-text);
  font-weight: 500;
  white-space: nowrap;
}

.header-youtube {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--color-red);
  color: var(--color-white);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  line-height: 1.2;
  flex-shrink: 0;
}

/* --- Hamburger Menu (CSS only) --- */
.menu-toggle-input {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.menu-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

.hamburger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* --- Breadcrumb --- */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 24px;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
  flex-wrap: wrap;
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.breadcrumb li::after {
  content: '>';
  margin: 0 8px;
  color: var(--color-border);
}

.breadcrumb li:last-child::after {
  content: '';
}

.breadcrumb a {
  color: var(--color-text-light);
}

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

.breadcrumb li:last-child span {
  color: var(--color-text);
  font-weight: 500;
}

/* --- Sidebar CTA (右側固定) --- */
.sidebar-cta {
  position: fixed;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 16px 8px;
  width: var(--sidebar-width);
  color: var(--color-white);
  font-size: 0.65rem;
  font-weight: 700;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.15em;
  transition: width 0.2s;
}

.sidebar-btn:hover {
  width: 58px;
  opacity: 1;
}

.sidebar-btn--contact {
  background: var(--color-blue-gray);
}

.sidebar-btn--estimate {
  background: var(--color-gold);
}

.sidebar-btn svg {
  writing-mode: horizontal-tb;
}

/* --- Main content --- */
.site-main {
  min-height: calc(100vh - var(--header-height) - 300px);
}

/* --- Article Page --- */
.article-header {
  background: linear-gradient(135deg, var(--color-red) 0%, var(--color-red-dark) 100%);
  padding: 48px 24px;
}

.article-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.article-meta time {
  font-family: var(--font-en);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
}

.article-tag {
  font-size: 0.7rem;
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  padding: 2px 10px;
  border-radius: 20px;
}

.article-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.5;
}

.article-body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 60px;
}

/* --- Article Body Typography --- */
.article-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 48px 0 20px;
  padding: 12px 0 12px 16px;
  border-left: 4px solid var(--color-red);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.article-body p {
  margin-bottom: 20px;
  line-height: 1.9;
}

.article-body ul,
.article-body ol {
  margin: 12px 0 20px 20px;
}

.article-body li {
  margin-bottom: 6px;
  line-height: 1.7;
}

.article-body strong {
  color: var(--color-red-dark);
  font-weight: 700;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 0.9rem;
}

.article-body th {
  background: var(--color-blue-gray);
  color: var(--color-white);
  padding: 10px 14px;
  text-align: left;
  font-weight: 500;
}

.article-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}

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

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 40px 0;
}

.article-body blockquote {
  border-left: 4px solid var(--color-gold);
  background: #faf8f4;
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 0.95rem;
  color: var(--color-text-light);
}

/* --- TL;DR --- */
.tldr {
  background: var(--color-red-light);
  border: 1px solid var(--color-red);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 0 0 32px;
}

.tldr-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-red);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tldr-body {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Article CTA --- */
.article-cta {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 40px;
}

.article-cta-inner {
  background: linear-gradient(135deg, var(--color-red) 0%, var(--color-red-dark) 100%);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
}

.article-cta-lead {
  color: var(--color-white);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.article-cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: all 0.2s;
  min-width: 180px;
}

.btn--primary {
  background: var(--color-white);
  color: var(--color-red);
  border: 2px solid var(--color-white);
}

.btn--primary:hover {
  background: transparent;
  color: var(--color-white);
  opacity: 1;
}

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

.btn--secondary:hover {
  background: var(--color-white);
  color: var(--color-red);
  opacity: 1;
}

/* --- Related Articles --- */
.related-articles {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 60px;
}

.related-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-red);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.related-card {
  background: var(--color-white);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: box-shadow 0.2s;
}

.related-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  opacity: 1;
}

.related-card-tags {
  font-size: 0.75rem;
  color: var(--color-red);
  font-weight: 500;
}

.related-card h3 {
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 8px;
  line-height: 1.5;
}

/* --- List Page --- */
.list-hero {
  background: linear-gradient(135deg, var(--color-red) 0%, var(--color-red-dark) 100%);
  padding: 48px 24px;
  text-align: center;
}

.list-hero-title {
  font-size: 1.8rem;
  color: var(--color-white);
  font-weight: 700;
}

.list-hero-desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* --- Tag Filter --- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.tag-filter-btn {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}

.tag-filter-btn:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

.tag-filter-btn.active {
  background: var(--color-red);
  border-color: var(--color-red);
  color: var(--color-white);
}

.article-list-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 60px;
}

.list-card {
  display: flex;
  align-items: center;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 12px;
  color: var(--color-text);
  transition: box-shadow 0.2s;
}

.list-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  opacity: 1;
}

.list-card-body {
  flex: 1;
}

.list-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.list-card-meta time {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.list-card-tag {
  font-size: 0.65rem;
  background: var(--color-red-light);
  color: var(--color-red);
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
}

.list-card-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 4px;
}

.list-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.list-card-arrow {
  font-family: var(--font-en);
  font-size: 1.2rem;
  color: var(--color-red);
  margin-left: 16px;
}

/* --- Footer CTA --- */
.footer-cta {
  background: linear-gradient(135deg, var(--color-blue-gray) 0%, var(--color-blue-gray-dark) 100%);
  padding: 48px 24px;
  text-align: center;
}

.footer-cta-title {
  font-size: 1.4rem;
  color: var(--color-white);
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-cta-text {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.footer-cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-text);
  padding: 24px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-company {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
}

.footer-nav {
  display: flex;
  gap: 16px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
}

/* --- External Link --- */
.external-link {
  color: var(--color-red);
}

.external-icon {
  display: inline-block;
  font-size: 0.75em;
  margin-left: 2px;
  vertical-align: super;
  color: var(--color-text-light);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 0px;
  }

  body {
    padding-right: 0;
    padding-bottom: 60px;
  }

  /* ハンバーガーメニュー表示 */
  .menu-toggle-label {
    display: flex;
  }

  .header-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
    z-index: 99;
  }

  .header-nav .nav-link {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-bg);
    font-size: 0.9rem;
  }

  .menu-toggle-input:checked~.header-nav {
    display: flex;
  }

  .menu-toggle-input:checked~.menu-toggle-label .hamburger-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle-input:checked~.menu-toggle-label .hamburger-bar:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle-input:checked~.menu-toggle-label .hamburger-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .header-youtube {
    display: none;
  }

  .logo-sub {
    display: none;
  }

  /* サイドバーCTAをモバイル下部に固定バーとして表示 */
  .sidebar-cta {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    transform: none;
    flex-direction: row;
    gap: 0;
    z-index: 200;
  }

  .sidebar-btn {
    flex: 1;
    width: auto;
    padding: 12px 8px;
    writing-mode: horizontal-tb;
    text-orientation: initial;
    flex-direction: row;
    gap: 6px;
    font-size: 0.75rem;
    letter-spacing: 0;
  }

  .sidebar-btn:hover {
    width: auto;
  }

  .article-title {
    font-size: 1.3rem;
  }

  .article-body h2 {
    font-size: 1.15rem;
  }

  .article-body h3 {
    font-size: 1rem;
  }

  .list-hero-title {
    font-size: 1.4rem;
  }

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

  .btn {
    min-width: 150px;
    padding: 12px 24px;
    font-size: 0.85rem;
  }

  .breadcrumb {
    padding: 8px 16px;
  }

  .breadcrumb ol {
    font-size: 0.72rem;
  }
}