/* =============================================
   リフォーム工務店 - 共通スタイル
   ============================================= */

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

:root {
  --color-black: #1a1a1a;
  --color-white: #ffffff;
  --color-gray-100: #f8f8f6;
  --color-gray-200: #f0eeeb;
  --color-gray-300: #e0ddd8;
  --color-gray-400: #c4c0ba;
  --color-gray-500: #8a8580;
  --color-gray-600: #5a5550;
  --color-accent: #1a1a1a;
  --color-text: #2a2a2a;
  --color-text-light: #6a6a6a;
  --color-border: #e8e4e0;
  --color-warm: #f5f2ee;
  
  --font-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --font-en: 'Playfair Display', 'Georgia', serif;
  --font-en-sans: 'Inter', 'Helvetica Neue', sans-serif;
  
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 32px;
  --spacing-lg: 64px;
  --spacing-xl: 96px;
  --spacing-2xl: 128px;
  
  --max-width: 1200px;
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--font-ja);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition);
}

a:hover {
  opacity: 0.7;
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
.en-title {
  font-family: var(--font-en);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.section-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--spacing-lg);
}

.section-title .en {
  font-family: var(--font-en);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--color-black);
}

.section-title .ja {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--color-text-light);
  font-weight: 400;
}

.section-title .divider {
  width: 40px;
  height: 1px;
  background: var(--color-black);
  margin-top: 8px;
}

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

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

.section--gray {
  background-color: var(--color-gray-100);
}

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

.section--dark {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.site-logo {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-black);
}

.global-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.global-nav a {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--color-text);
  font-weight: 500;
}

.nav-contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-black);
  color: var(--color-white) !important;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: background var(--transition), opacity var(--transition) !important;
}

.nav-contact-btn:hover {
  opacity: 0.8 !important;
}

/* --- Hamburger --- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-black);
  transition: var(--transition);
}

/* --- Mobile Nav --- */
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  width: 100%;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md);
  z-index: 999;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

.mobile-nav a {
  font-size: 15px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-weight: 500;
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: var(--spacing-sm) 0;
  font-size: 12px;
  color: var(--color-text-light);
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: '→';
  color: var(--color-gray-400);
}

/* --- Page Hero --- */
.page-hero {
  padding-top: 64px;
  text-align: center;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.page-hero .inner {
  padding-top: var(--spacing-xl);
}

.page-hero .en {
  font-family: var(--font-en);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  display: block;
}

.page-hero .ja {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--color-text-light);
  display: block;
  margin-top: 12px;
}

.page-hero .divider {
  width: 40px;
  height: 1px;
  background: var(--color-black);
  margin: 16px auto 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 40px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn--black {
  background: var(--color-black);
  color: var(--color-white);
}

.btn--black:hover {
  background: #333;
  opacity: 1;
}

.btn--outline {
  background: transparent;
  color: var(--color-black);
  border: 1px solid var(--color-black);
}

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

.btn--white {
  background: var(--color-white);
  color: var(--color-black);
}

.btn--white:hover {
  opacity: 0.85;
}

.btn svg {
  transition: transform var(--transition);
}

.btn:hover svg {
  transform: translateX(4px);
}

/* --- Footer Contact CTA --- */
.footer-cta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 280px;
}

.footer-cta__info {
  padding: var(--spacing-xl) var(--spacing-lg);
  background: var(--color-white);
}

.footer-cta__info .company-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.footer-cta__info .address {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.footer-cta__info .footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px var(--spacing-md);
  font-size: 13px;
  margin-bottom: var(--spacing-sm);
}

.footer-cta__info .footer-sub-links {
  display: flex;
  gap: var(--spacing-md);
  font-size: 12px;
  color: var(--color-text-light);
}

.footer-cta__contact {
  background: var(--color-black);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  text-align: center;
}

.footer-cta__contact .contact-en {
  font-family: var(--font-en);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: 0.05em;
  opacity: 0.9;
}

.footer-cta__contact .contact-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  max-width: 320px;
  line-height: 1.8;
}

.footer-cta__contact .contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255,255,255,0.5);
  color: var(--color-white);
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: all var(--transition);
  margin-top: 8px;
}

.footer-cta__contact .contact-btn:hover {
  background: var(--color-white);
  color: var(--color-black);
  opacity: 1;
}

/* --- Site Footer --- */
.site-footer {
  background: var(--color-black);
  color: rgba(255,255,255,0.4);
  text-align: center;
  padding: var(--spacing-sm);
  font-size: 11px;
  letter-spacing: 0.05em;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-xl: 64px;
    --spacing-2xl: 80px;
  }
  
  .global-nav .nav-items {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .footer-cta {
    grid-template-columns: 1fr;
  }
  
  .footer-cta__info {
    padding: var(--spacing-md);
  }
  
  .footer-cta__contact {
    padding: var(--spacing-md);
  }
}

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