/* ===== Shiba Bench — Common Styles ===== */
:root {
  --red: #E8341A;
  --red-dark: #c02a12;
  --orange: #FF6B35;
  --white: #FFFFFF;
  --off-white: #F8F6F3;
  --light: #F0EDE8;
  --mid: #C8C0B8;
  --dark: #2A2420;
  --text: #1A1614;
  --gray: #6B6460;
  --card: #FFFFFF;
  --border: #E8E0D8;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { background: var(--off-white); color: var(--text); font-family: 'Noto Sans JP', sans-serif; overflow-x: hidden; }

/* ===== NAV ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--white);
  border-bottom: 3px solid var(--red);
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 48px; height: 64px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}
.nav-logo { font-family: 'Oswald', sans-serif; font-size: 26px; font-weight: 700; letter-spacing: 3px; color: var(--dark); text-decoration: none; }
.nav-logo span { color: var(--red); }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { color: var(--gray); text-decoration: none; font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--red); }
.nav-back { font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 700; letter-spacing: 2px; color: var(--gray); text-decoration: none; text-transform: uppercase; transition: color 0.2s; }
.nav-back:hover { color: var(--red); }

/* ===== HAMBURGER MENU ===== */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; z-index: 101; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--dark); margin: 6px 0; transition: all 0.3s ease; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }
.mobile-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 98; }
.mobile-overlay.active { display: block; }
.mobile-menu {
  position: fixed; top: 64px; right: 0; width: 280px; height: calc(100vh - 64px);
  background: var(--white); z-index: 99; padding: 32px 24px;
  box-shadow: -4px 0 20px rgba(0,0,0,0.1);
  transform: translateX(100%); transition: transform 0.3s ease, visibility 0.3s ease;
  overflow-y: auto;
  display: none;
  visibility: hidden;
  pointer-events: none;
}
@media (max-width: 768px) {
  .mobile-menu { display: block; }
}
.mobile-menu.active {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}
.mobile-menu a {
  display: block; padding: 16px 0; color: var(--text); text-decoration: none;
  font-family: 'Montserrat', sans-serif; font-size: 14px; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase; border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--red); }

/* ===== FOOTER ===== */
footer {
  background: var(--dark); color: var(--mid); padding: 48px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 24px;
}
.footer-logo { font-family: 'Oswald', sans-serif; font-size: 22px; font-weight: 700; letter-spacing: 3px; color: var(--white); }
.footer-logo span { color: var(--red); }
.footer-text { font-size: 12px; font-family: 'Montserrat', sans-serif; }
.footer-text a { color: var(--mid); text-decoration: none; margin-right: 16px; transition: color 0.2s; }
.footer-text a:hover { color: var(--white); }

/* ===== PAGE HERO (sub pages) ===== */
.page-hero { padding: 120px 48px 60px; background: var(--white); border-bottom: 1px solid var(--border); }
.page-hero-inner { max-width: 800px; margin: 0 auto; }
.page-tag { display: inline-block; background: var(--red); color: white; padding: 4px 14px; font-family: 'Montserrat', sans-serif; font-size: 11px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase; margin-bottom: 20px; }
.page-title { font-family: 'Oswald', sans-serif; font-size: clamp(32px, 5vw, 48px); font-weight: 700; margin-bottom: 12px; }
.page-desc { font-size: 15px; color: var(--gray); line-height: 1.8; }

/* ===== SECTION ===== */
.section { padding: 100px 48px; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-tag { display: inline-block; background: var(--red); color: white; padding: 4px 14px; font-family: 'Montserrat', sans-serif; font-size: 11px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase; margin-bottom: 16px; }
.section-title { font-family: 'Oswald', sans-serif; font-size: clamp(36px, 5vw, 56px); font-weight: 700; letter-spacing: 1px; margin-bottom: 16px; line-height: 1.1; }
.section-desc { font-size: 15px; color: var(--gray); line-height: 1.8; margin-bottom: 48px; max-width: 600px; }

/* ===== BUTTONS ===== */
.btn-primary { display: inline-block; background: var(--red); color: white; padding: 16px 36px; font-family: 'Montserrat', sans-serif; font-size: 14px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; text-decoration: none; border: none; cursor: pointer; transition: all 0.2s; border-radius: 2px; }
.btn-primary:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,52,26,0.3); }
.btn-outline { display: inline-block; background: transparent; color: var(--red); padding: 16px 36px; font-family: 'Montserrat', sans-serif; font-size: 14px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; text-decoration: none; border: 2px solid var(--red); cursor: pointer; transition: all 0.2s; border-radius: 2px; }
.btn-outline:hover { background: var(--red); color: white; }

/* ===== BADGES ===== */
.badge { display: inline-block; padding: 4px 12px; font-size: 12px; font-family: 'Montserrat', sans-serif; font-weight: 700; border-radius: 2px; }
.badge-s { background: rgba(201,168,76,0.15); color: #C9A84C; border: 1px solid #C9A84C; }
.badge-a { background: rgba(232,52,26,0.15); color: #E8341A; border: 1px solid #E8341A; }
.badge-b { background: rgba(72,187,120,0.15); color: #2F855A; border: 1px solid #48BB78; }
.badge-c { background: rgba(99,179,237,0.15); color: #2B6CB0; border: 1px solid #63B3ED; }
.badge-d { background: rgba(160,160,160,0.15); color: #718096; border: 1px solid #A0A0A0; }

/* ===== FADE IN ===== */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== FORM COMMON ===== */
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-family: 'Montserrat', sans-serif; font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--gray); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; border: 2px solid var(--border); background: var(--white); color: var(--text);
  padding: 14px 16px; font-family: 'Noto Sans JP', sans-serif; font-size: 15px;
  outline: none; transition: border-color 0.2s; border-radius: 2px;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--red); }

/* ===== CHECKER RESULT ===== */
.result-wrap { display: none; margin-top: 20px; animation: slideUp 0.4s ease; }
.result-wrap.show { display: block; }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.result-rank-display { padding: 32px; text-align: center; border-radius: 4px; margin-bottom: 16px; }
.result-rank-text { font-family: 'Oswald', sans-serif; font-size: 64px; font-weight: 700; line-height: 1; color: white; }
.result-rank-label { font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: rgba(255,255,255,0.8); margin-top: 8px; }
.result-detail { background: var(--off-white); padding: 24px; border-radius: 4px; margin-bottom: 16px; }
.result-ratio-badge { display: inline-block; background: var(--dark); color: white; padding: 8px 20px; font-family: 'Oswald', sans-serif; font-size: 20px; margin-bottom: 12px; border-radius: 2px; }
.result-comment { font-size: 14px; color: var(--gray); line-height: 1.8; }
.result-products { background: white; border: 1px solid var(--border); padding: 20px; border-radius: 4px; margin-bottom: 16px; }
.result-products-title { font-family: 'Montserrat', sans-serif; font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--red); margin-bottom: 12px; }
.product-links { display: flex; flex-wrap: wrap; gap: 8px; }
.product-link { display: inline-block; border: 1px solid var(--border); padding: 8px 16px; color: var(--gray); text-decoration: none; font-size: 13px; transition: all 0.2s; font-family: 'Montserrat', sans-serif; border-radius: 2px; }
.product-link:hover { border-color: var(--red); color: var(--red); }
.share-btn { display: inline-block; background: #000000; color: white; padding: 12px 24px; font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 1px; border: none; cursor: pointer; text-decoration: none; border-radius: 2px; transition: opacity 0.2s; }
.share-btn:hover { opacity: 0.85; }

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  .hamburger { display: block; }
  .mobile-menu { display: block; }
  .section { padding: 60px 20px; }
  .page-hero { padding: 90px 20px 40px; }
  footer { flex-direction: column; text-align: center; padding: 32px 20px; }
}