/*
Theme Name: Hydrogen Salon
Theme URI: https://example.com/hydrogen-salon
Author: Claude
Author URI: https://claude.ai
Description: シンプル・ミニマルな水素サロン紹介テーマ
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: hydrogen-salon
Tags: minimal, portfolio, salon, blog, responsive
*/

/* ========================================
   CSS Variables
======================================== */
:root {
  --color-bg: #fafaf8;
  --color-bg-alt: #f0ede8;
  --color-surface: #ffffff;
  --color-text: #1a1a18;
  --color-text-muted: #6b6b66;
  --color-accent: #7ab3a8;
  --color-accent-dark: #5a9990;
  --color-accent-light: #c2dedd;
  --color-border: #e0ddd8;
  --color-water: #d6edf0;

  --font-display: 'Cormorant Garamond', 'Hiragino Mincho ProN', serif;
  --font-body: 'Zen Kaku Gothic New', 'Hiragino Sans', sans-serif;
  --font-accent: 'Cormorant', serif;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-soft: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-medium: 0 8px 40px rgba(0,0,0,0.10);

  --container-width: 1100px;
  --header-height: 80px;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

/* ========================================
   Typography
======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

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

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

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

/* ========================================
   Header / Navigation
======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-soft);
}

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

.site-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-logo .logo-en {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

.site-logo .logo-jp {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
}

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

.main-nav a {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 4px;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.main-nav a:hover,
.main-nav a.current-menu-item {
  color: var(--color-text);
}

.main-nav a:hover::after,
.main-nav a.current-menu-item::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-text);
  transition: var(--transition);
}

/* ========================================
   Hero Section
======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-water) 0%, var(--color-bg) 50%, var(--color-bg-alt) 100%);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(122, 179, 168, 0.15) 0%, transparent 70%);
  top: 10%;
  right: -10%;
  animation: float 8s ease-in-out infinite;
}

.hero-bg::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(194, 222, 221, 0.2) 0%, transparent 70%);
  bottom: 10%;
  left: -5%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  opacity: 0;
  animation: fadeUp 1s 0.3s forwards;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-accent);
}

.hero-title {
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  opacity: 0;
  animation: fadeUp 1s 0.5s forwards;
}

.hero-title .en {
  display: block;
  font-style: italic;
  color: var(--color-accent-dark);
}

.hero-desc {
  font-size: 1rem;
  max-width: 480px;
  margin-bottom: var(--spacing-lg);
  opacity: 0;
  animation: fadeUp 1s 0.7s forwards;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  opacity: 0;
  animation: fadeUp 1s 0.9s forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-scroll {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
  opacity: 0;
  animation: fadeUp 1s 1.2s forwards;
}

.hero-scroll span {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ========================================
   Buttons
======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(122, 179, 168, 0.35);
  color: white;
}

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

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

/* ========================================
   Section Header
======================================== */
.section-header {
  margin-bottom: var(--spacing-lg);
}

.section-header.center {
  text-align: center;
}

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.section-divider {
  width: 40px;
  height: 1px;
  background: var(--color-accent);
  margin: var(--spacing-sm) 0;
}

.section-header.center .section-divider {
  margin: var(--spacing-sm) auto;
}

/* ========================================
   About / Concept Section
======================================== */
.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.concept-image {
  position: relative;
}

.concept-image-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, var(--color-water), var(--color-accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
}

.concept-image-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.concept-image-placeholder {
  text-align: center;
  color: var(--color-accent-dark);
  font-family: var(--font-display);
  font-size: 1.2rem;
  padding: var(--spacing-md);
}

.concept-image-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  background: var(--color-surface);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-medium);
}

.concept-image-badge .num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-accent-dark);
  line-height: 1;
}

.concept-image-badge .label {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.concept-text h2 {
  margin-bottom: var(--spacing-md);
}

.concept-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.concept-feature {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.concept-feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.concept-feature-text h4 {
  margin-bottom: 4px;
  font-family: var(--font-display);
}

.concept-feature-text p {
  margin: 0;
  font-size: 0.85rem;
}

/* ========================================
   Menu / Services
======================================== */
.menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.menu-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.menu-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
}

.menu-card-image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-water), var(--color-accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-accent-dark);
}

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

.menu-card-body {
  padding: var(--spacing-md);
}

.menu-card-tag {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: var(--color-accent-light);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-sm);
}

.menu-card-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-text);
  margin-bottom: 8px;
}

.menu-card-price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-accent-dark);
}

.menu-card-price span {
  font-size: 0.8rem;
  font-family: var(--font-body);
  color: var(--color-text-muted);
}

/* ========================================
   Column / Blog Section
======================================== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.post-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
}

.post-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-water), var(--color-accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.post-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.post-card:hover .post-card-image img {
  transform: scale(1.05);
}

.post-card-body {
  padding: var(--spacing-md);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.post-card-category {
  color: var(--color-accent-dark);
  font-weight: 500;
}

.post-card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-excerpt {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

/* ========================================
   Column Archive Page
======================================== */
.page-hero {
  padding: calc(var(--header-height) + var(--spacing-xl)) 0 var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-water), var(--color-bg));
  text-align: center;
}

.page-hero-label {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  display: block;
  margin-bottom: var(--spacing-sm);
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--color-text);
}

.page-hero-en {
  font-style: italic;
  color: var(--color-accent-dark);
  display: block;
  font-size: 0.6em;
  letter-spacing: 0.1em;
}

/* ========================================
   Single Post
======================================== */
.post-content {
  max-width: 760px;
  margin: 0 auto;
}

.post-header {
  padding: calc(var(--header-height) + var(--spacing-xl)) 0 var(--spacing-lg);
  text-align: center;
}

.post-header-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.post-header-category {
  color: var(--color-accent-dark);
  font-weight: 500;
  letter-spacing: 0.1em;
}

.post-header-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.post-thumbnail {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  aspect-ratio: 16/7;
  background: linear-gradient(135deg, var(--color-water), var(--color-accent-light));
}

.post-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-body {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-text);
}

.post-body p { color: var(--color-text); margin-bottom: 1.5em; }
.post-body h2 { font-size: 1.6rem; margin: 2em 0 0.8em; }
.post-body h3 { font-size: 1.3rem; margin: 1.8em 0 0.6em; color: var(--color-accent-dark); }
.post-body ul, .post-body ol { padding-left: 1.5em; margin-bottom: 1.5em; list-style: disc; }
.post-body blockquote { border-left: 3px solid var(--color-accent); padding-left: var(--spacing-md); margin: var(--spacing-md) 0; color: var(--color-text-muted); font-style: italic; font-family: var(--font-display); }

/* ========================================
   Pagination
======================================== */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.pagination a,
.pagination span {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
  transition: all var(--transition);
  color: var(--color-text-muted);
}

.pagination a:hover,
.pagination .current {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
}

/* ========================================
   Access / Map Section
======================================== */
.access-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.access-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.access-item {
  display: flex;
  gap: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

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

.access-item-label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  min-width: 80px;
  padding-top: 2px;
}

.access-item-value {
  font-size: 0.9rem;
  color: var(--color-text);
}

.access-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 400px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
}

.access-map iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ========================================
   Footer
======================================== */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.6);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand .logo-en {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: white;
  display: block;
  margin-bottom: 4px;
}

.footer-brand .logo-jp {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-md);
  display: block;
}

.footer-brand p {
  font-size: 0.82rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.45);
  margin: 0;
}

.footer-nav-title {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--spacing-md);
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-list a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}

.footer-nav-list a:hover {
  color: var(--color-accent-light);
}

.footer-bottom {
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
}

/* ========================================
   Sidebar
======================================== */
.content-sidebar-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-xl);
  align-items: start;
}

.sidebar-widget {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  margin-bottom: var(--spacing-md);
}

.sidebar-widget-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-category-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-category-list li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: color var(--transition);
}

.sidebar-category-list li a:hover {
  color: var(--color-accent-dark);
}

.sidebar-category-list li a span {
  font-size: 0.75rem;
  background: var(--color-bg-alt);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 1024px) {
  .menu-grid,
  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .concept-grid,
  .access-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-xl: 5rem;
    --spacing-lg: 3rem;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(250, 250, 248, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-md);
  }

  .main-nav.open { display: flex; }
  .menu-toggle { display: flex; }

  .menu-grid,
  .posts-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .content-sidebar-wrapper {
    grid-template-columns: 1fr;
  }

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

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