/* ===================================
   kattoki.website - Main Stylesheet
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&display=swap');

:root {
  --color-primary: #FF6B35;
  --color-primary-dark: #E55A25;
  --color-primary-light: #FF8F5E;
  --color-secondary: #2C3E50;
  --color-secondary-light: #3D5166;
  --color-bg: #F8F9FA;
  --color-bg-white: #FFFFFF;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-border: #E0E0E0;
  --color-success: #27AE60;
  --color-warning: #F39C12;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --font-main: 'Noto Sans JP', sans-serif;
  --max-width: 1200px;
}

*, *::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-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }

/* Layout */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 16px; }
.section { padding: 60px 0; }

.section-title {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 8px;
  position: relative;
  padding-left: 16px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 80%;
  background: var(--color-primary);
  border-radius: 2px;
}
.section-subtitle {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 32px;
  padding-left: 16px;
}

/* Header */
.site-header {
  background: var(--color-secondary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 900;
  font-size: 1.3rem;
  white-space: nowrap;
  text-decoration: none;
}
.site-logo:hover { color: var(--color-primary); }
.logo-icon { font-size: 1.6rem; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.site-nav a:hover { background: rgba(255,255,255,0.15); color: var(--color-primary); }

.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 24px;
  overflow: hidden;
  max-width: 240px;
  width: 100%;
}
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 0.85rem;
  padding: 8px 14px;
  width: 100%;
  font-family: var(--font-main);
}
.header-search input::placeholder { color: rgba(255,255,255,0.5); }
.header-search button {
  background: var(--color-primary);
  border: none;
  color: #fff;
  padding: 8px 14px;
  cursor: pointer;
  transition: background var(--transition);
  font-size: 0.9rem;
}
.header-search button:hover { background: var(--color-primary-dark); }

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.hamburger span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 50%, #1a252f 100%);
  color: #fff;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,107,53,0.2) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,107,53,0.2);
  border: 1px solid rgba(255,107,53,0.4);
  color: var(--color-primary-light);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 16px;
}
.hero-title .accent { color: var(--color-primary); }
.hero-description { font-size: 1rem; color: rgba(255,255,255,0.8); margin-bottom: 32px; line-height: 1.8; }

.hero-stats { display: flex; gap: 32px; margin-bottom: 32px; }
.hero-stat { text-align: center; }
.hero-stat .number { font-size: 1.8rem; font-weight: 900; color: var(--color-primary); line-height: 1; }
.hero-stat .label { font-size: 0.75rem; color: rgba(255,255,255,0.6); margin-top: 4px; }

.hero-buttons { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-image { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero-img-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.hero-img-card:first-child { grid-column: 1 / -1; aspect-ratio: 16/9; font-size: 4rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,107,53,0.4);
}
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; }
.btn-amazon {
  background: #FF9900;
  color: #fff;
  border-color: #FF9900;
  font-size: 1rem;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  width: 100%;
  justify-content: center;
}
.btn-amazon:hover {
  background: #E68900;
  border-color: #E68900;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,153,0,0.4);
}
.btn-amazon::before { content: ''; }

/* Cards */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-text-muted);
}
.card-body { padding: 20px; }
.card-category {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-excerpt {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--color-text-muted); }
.card-rating { color: var(--color-warning); font-weight: 700; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

/* Category */
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.category-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  color: var(--color-text);
  display: block;
  border: 2px solid transparent;
}
.category-card:hover { border-color: var(--color-primary); transform: translateY(-4px); box-shadow: var(--shadow-md); color: var(--color-text); }
.category-icon { font-size: 2.5rem; margin-bottom: 12px; display: block; }
.category-name { font-weight: 700; font-size: 0.95rem; color: var(--color-secondary); margin-bottom: 4px; }
.category-count { font-size: 0.8rem; color: var(--color-text-muted); }

/* Article Layout */
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; padding: 40px 0 60px; }
.article-header { margin-bottom: 32px; }
.article-header .breadcrumb {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.article-title { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 900; color: var(--color-secondary); line-height: 1.4; margin-bottom: 16px; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-border);
}
.article-meta .rating { color: var(--color-warning); font-weight: 700; font-size: 1rem; }

.article-body { line-height: 1.9; font-size: 1rem; }
.article-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin: 40px 0 16px;
  padding: 12px 20px;
  background: linear-gradient(135deg, rgba(44,62,80,0.05), rgba(255,107,53,0.05));
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.article-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px dashed var(--color-border);
}
.article-body p { margin-bottom: 20px; }
.article-body ul, .article-body ol { margin: 16px 0 20px 20px; }
.article-body ul li, .article-body ol li { margin-bottom: 8px; position: relative; list-style: disc; }
.article-body ol li { list-style: decimal; }

/* Product Box */
.product-box {
  background: var(--color-bg-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 32px 0;
  transition: border-color var(--transition);
}
.product-box:hover { border-color: var(--color-primary); }
.product-box-inner { display: grid; grid-template-columns: 160px 1fr; gap: 24px; align-items: start; }
.product-img {
  aspect-ratio: 1;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  overflow: hidden;
}
.product-img img { width: 100%; height: 100%; object-fit: contain; }
.product-name { font-size: 1.1rem; font-weight: 700; color: var(--color-secondary); margin-bottom: 8px; }
.product-rating { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.stars { color: var(--color-warning); font-size: 1.1rem; }
.rating-score { font-weight: 700; color: var(--color-warning); }
.product-price { font-size: 1.5rem; font-weight: 900; color: var(--color-primary); margin-bottom: 4px; }
.product-price-note { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 16px; }
.product-features { margin-bottom: 20px; }
.product-features li { display: flex; align-items: flex-start; gap: 8px; font-size: 0.9rem; margin-bottom: 6px; list-style: none; }
.product-features li::before { content: '\2713'; color: var(--color-success); font-weight: 700; flex-shrink: 0; }

/* Pros/Cons */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.pros, .cons { background: var(--color-bg-white); border-radius: var(--radius-sm); padding: 20px; }
.pros { border-left: 4px solid var(--color-success); }
.cons { border-left: 4px solid #E74C3C; }
.pros-cons-title { font-weight: 700; margin-bottom: 12px; font-size: 0.95rem; }
.pros .pros-cons-title { color: var(--color-success); }
.cons .pros-cons-title { color: #E74C3C; }
.pros-cons li { font-size: 0.85rem; margin-bottom: 6px; display: flex; align-items: flex-start; gap: 6px; list-style: none; }
.pros li::before { content: '\25CB'; color: var(--color-success); flex-shrink: 0; }
.cons li::before { content: '\00D7'; color: #E74C3C; flex-shrink: 0; }

/* Score Box */
.score-box {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-light));
  color: #fff;
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 32px 0;
  text-align: center;
}
.score-box-title { font-size: 0.9rem; opacity: 0.7; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.1em; }
.score-number { font-size: 4rem; font-weight: 900; color: var(--color-primary); line-height: 1; margin-bottom: 8px; }
.score-label { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; }
.score-bars { display: grid; gap: 12px; text-align: left; }
.score-bar-item { display: grid; grid-template-columns: 80px 1fr 40px; align-items: center; gap: 12px; font-size: 0.85rem; }
.score-bar-track { background: rgba(255,255,255,0.2); border-radius: 4px; height: 8px; overflow: hidden; }
.score-bar-fill { height: 100%; background: var(--color-primary); border-radius: 4px; transition: width 1s ease; }

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, rgba(255,107,53,0.08), rgba(255,107,53,0.04));
  border: 2px solid rgba(255,107,53,0.3);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  margin: 32px 0;
}
.cta-box h3 { font-size: 1.3rem; font-weight: 700; color: var(--color-secondary); margin-bottom: 8px; }
.cta-box p { color: var(--color-text-light); margin-bottom: 20px; font-size: 0.9rem; }

/* Sidebar */
.sidebar { position: sticky; top: 80px; display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget { background: var(--color-bg-white); border-radius: var(--radius-md); padding: 24px; box-shadow: var(--shadow-sm); }
.sidebar-widget-title { font-size: 1rem; font-weight: 700; color: var(--color-secondary); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--color-primary); }
.sidebar-product { display: flex; gap: 12px; margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--color-border); }
.sidebar-product:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.sidebar-product-img { width: 60px; height: 60px; background: var(--color-bg); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex-shrink: 0; }
.sidebar-product-name { font-size: 0.85rem; font-weight: 700; color: var(--color-secondary); margin-bottom: 4px; }
.sidebar-product-price { color: var(--color-primary); font-weight: 700; font-size: 0.9rem; }

/* TOC */
.toc { background: var(--color-bg); border-radius: var(--radius-sm); padding: 20px; margin: 32px 0; border-left: 4px solid var(--color-primary); }
.toc-title { font-weight: 700; color: var(--color-secondary); margin-bottom: 12px; font-size: 0.95rem; }
.toc ol { margin-left: 16px; }
.toc li { list-style: decimal; margin-bottom: 6px; font-size: 0.85rem; }
.toc a { color: var(--color-text-light); }
.toc a:hover { color: var(--color-primary); }

/* Comparison Table */
.comparison-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.9rem; }
.comparison-table th { background: var(--color-secondary); color: #fff; padding: 12px 16px; text-align: left; font-weight: 700; }
.comparison-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.comparison-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.comparison-table td { padding: 12px 16px; border-bottom: 1px solid var(--color-border); }
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:nth-child(even) td { background: var(--color-bg); }
.comparison-table .best { background: rgba(255,107,53,0.08); }
.comparison-table .check { color: var(--color-success); font-weight: 700; }
.comparison-table .cross { color: #E74C3C; }

/* Footer */
.site-footer { background: var(--color-secondary); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .site-logo { margin-bottom: 16px; }
.footer-description { font-size: 0.85rem; line-height: 1.8; margin-bottom: 20px; }
.footer-heading { color: #fff; font-weight: 700; font-size: 0.95rem; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.85rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; flex-wrap: wrap; gap: 12px; }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: rgba(255,255,255,0.5); }
.footer-bottom-links a:hover { color: var(--color-primary); }
.affiliate-note { background: rgba(255,255,255,0.05); padding: 12px 20px; font-size: 0.78rem; color: rgba(255,255,255,0.4); text-align: center; border-top: 1px solid rgba(255,255,255,0.08); }

/* Utilities */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.bg-white { background: var(--color-bg-white); }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; } .mb-32 { margin-bottom: 32px; }
.tag { display: inline-block; background: var(--color-bg); color: var(--color-text-light); font-size: 0.75rem; padding: 3px 10px; border-radius: 20px; border: 1px solid var(--color-border); }
.badge-new { background: var(--color-primary); color: #fff; font-size: 0.7rem; font-weight: 700; padding: 3px 8px; border-radius: 4px; text-transform: uppercase; letter-spacing: 0.05em; }

.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.page-btn { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 700; transition: all var(--transition); text-decoration: none; color: var(--color-text-light); background: var(--color-bg-white); box-shadow: var(--shadow-sm); }
.page-btn.active, .page-btn:hover { background: var(--color-primary); color: #fff; }

/* Responsive */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .hero { padding: 60px 0; }
}

@media (max-width: 768px) {
  .site-nav, .header-search { display: none; }
  .site-nav.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--color-secondary);
    padding: 20px;
    z-index: 999;
    box-shadow: var(--shadow-md);
  }
  .hamburger { display: flex; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .product-box-inner { grid-template-columns: 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .section { padding: 40px 0; }
}

@media (max-width: 480px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .score-bar-item { grid-template-columns: 70px 1fr 40px; }
}