/* ===================================
   JUDO FOUNDRY - Style System
   =================================== */

:root {
    --color-ink: #1a1a1a;
    --color-paper: #f7f5f0;
    --color-paper-dark: #e8e4db;
    --color-accent: #8b2332;
    --color-accent-light: #c43c4e;
    --color-gold: #c4a35a;
    --belt-white: #f5f5f5;
    --belt-yellow: #e6c84b;
    --belt-orange: #e67e22;
    --belt-green: #27ae60;
    --belt-brown: #6b4423;
    --belt-black: #1a1a1a;
    --font-jp: 'Noto Serif JP', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); background-color: var(--color-paper); color: var(--color-ink); line-height: 1.7; overflow-x: hidden; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-md); }
.hidden { display: none !important; }

/* Navigation */
.main-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(247, 245, 240, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(26, 26, 26, 0.1); }
.nav-container { max-width: 1200px; margin: 0 auto; padding: var(--space-sm) var(--space-md); display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: var(--space-sm); text-decoration: none; color: var(--color-ink); }
.logo-kanji { font-family: var(--font-jp); font-size: 1.5rem; color: var(--color-accent); }
.logo-text { font-weight: 500; font-size: 1.1rem; letter-spacing: 0.05em; }
.nav-links { display: flex; list-style: none; gap: var(--space-md); }
.nav-links a { text-decoration: none; color: var(--color-ink); font-size: 0.9rem; letter-spacing: 0.03em; position: relative; padding: var(--space-xs) 0; transition: color var(--transition-fast); }
.nav-links a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--color-accent); transition: width var(--transition-medium); }
.nav-links a:hover { color: var(--color-accent); }
.nav-links a:hover::after { width: 100%; }
.nav-controls { display: flex; align-items: center; gap: var(--space-sm); }

/* Language Toggle */
.lang-toggle { display: flex; align-items: center; gap: 4px; background: none; border: 2px solid var(--color-ink); padding: 6px 12px; cursor: pointer; font-family: var(--font-body); font-size: 0.85rem; font-weight: 500; transition: all var(--transition-fast); }
.lang-toggle:hover { background: var(--color-ink); color: var(--color-paper); }
.lang-option { opacity: 0.5; transition: opacity var(--transition-fast); }
.lang-option.active { opacity: 1; color: var(--color-accent); }
.lang-divider { opacity: 0.3; }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: var(--space-xs); }
.mobile-menu-btn span { width: 24px; height: 2px; background: var(--color-ink); transition: var(--transition-fast); }

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; position: relative; background: linear-gradient(135deg, var(--color-paper) 0%, var(--color-paper-dark) 100%); overflow: hidden; }
.hero-content { text-align: center; z-index: 1; padding: var(--space-lg); }
.hero-kanji { font-family: var(--font-jp); font-size: clamp(5rem, 15vw, 12rem); color: var(--color-accent); opacity: 0.15; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); pointer-events: none; line-height: 1; }
.hero h1 { font-family: var(--font-jp); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 400; letter-spacing: 0.1em; margin-bottom: var(--space-sm); position: relative; }
.hero-subtitle { font-size: 1.1rem; color: #666; margin-bottom: var(--space-md); letter-spacing: 0.05em; }
.cta-button { display: inline-block; padding: var(--space-sm) var(--space-md); background: var(--color-ink); color: var(--color-paper); text-decoration: none; font-size: 0.9rem; letter-spacing: 0.1em; text-transform: uppercase; border: 2px solid var(--color-ink); transition: all var(--transition-medium); }
.cta-button:hover { background: transparent; color: var(--color-ink); }
.hero-enso { position: absolute; width: 500px; height: 500px; border: 3px solid var(--color-accent); border-radius: 50%; opacity: 0.08; top: 50%; left: 50%; transform: translate(-50%, -50%); }

/* Sections */
.section { padding: var(--space-xl) 0; }
.section-header { text-align: center; margin-bottom: var(--space-lg); }
.section-kanji { font-family: var(--font-jp); font-size: 3rem; color: var(--color-accent); opacity: 0.3; display: block; margin-bottom: var(--space-sm); }
.section-header h2 { font-family: var(--font-jp); font-size: 2rem; font-weight: 400; letter-spacing: 0.1em; }
.section-subtitle { color: #666; margin-top: var(--space-xs); font-size: 0.95rem; }

/* Philosophy */
.philosophy-section { background: var(--color-paper); }
.principles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--space-md); margin-bottom: var(--space-lg); }
.principle-card { background: white; padding: var(--space-md); text-align: center; border: 1px solid rgba(26, 26, 26, 0.1); transition: transform var(--transition-medium), box-shadow var(--transition-medium); }
.principle-card:hover { transform: translateY(-5px); box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08); }
.principle-kanji { font-family: var(--font-jp); font-size: 1.8rem; color: var(--color-accent); margin-bottom: var(--space-sm); }
.principle-card h3 { font-size: 1.1rem; font-weight: 500; margin-bottom: var(--space-xs); }
.principle-card p { color: #555; font-size: 0.95rem; }
.moral-code { background: white; padding: var(--space-md); border: 1px solid rgba(26, 26, 26, 0.1); }
.moral-code h3 { text-align: center; font-size: 1.3rem; font-weight: 500; margin-bottom: var(--space-md); color: var(--color-accent); }
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--space-sm); }
.value-item { display: flex; flex-direction: column; align-items: center; padding: var(--space-sm); text-align: center; transition: transform var(--transition-fast); }
.value-item:hover { transform: scale(1.05); }
.value-kanji { font-family: var(--font-jp); font-size: 1.5rem; color: var(--color-accent); }
.value-name { font-size: 0.85rem; color: #666; margin: var(--space-xs) 0; }
.value-meaning { font-size: 0.9rem; font-weight: 500; }

/* Belt System */
.belt-section { background: linear-gradient(180deg, var(--color-paper-dark) 0%, var(--color-paper) 100%); }
.belt-path { max-width: 800px; margin: 0 auto; }
.belt-card { display: flex; align-items: center; gap: var(--space-md); padding: var(--space-md); background: white; border: 1px solid rgba(26, 26, 26, 0.1); transition: all var(--transition-medium); }
.belt-card:hover { transform: translateX(10px); box-shadow: -5px 5px 20px rgba(0, 0, 0, 0.08); }
.belt-visual { flex-shrink: 0; }
.belt { width: 120px; height: 20px; border-radius: 2px; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15); }
.belt.white { background: var(--belt-white); border: 1px solid #ddd; }
.belt.yellow { background: var(--belt-yellow); }
.belt.orange { background: var(--belt-orange); }
.belt.green { background: var(--belt-green); }
.belt.brown { background: var(--belt-brown); }
.belt.black { background: var(--belt-black); }
.belt-info { flex: 1; }
.belt-rank { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent); }
.belt-info h3 { font-size: 1.3rem; font-weight: 500; margin: var(--space-xs) 0; }
.belt-japanese { font-family: var(--font-jp); font-size: 0.9rem; color: #888; }
.belt-info p { margin-top: var(--space-xs); font-size: 0.9rem; color: #666; }
.belt-connector { width: 3px; height: 40px; background: linear-gradient(180deg, rgba(139, 35, 50, 0.3) 0%, rgba(139, 35, 50, 0.1) 100%); margin: 0 auto; }

/* Vocabulary */
.vocabulary-section { background: var(--color-paper); }
.vocab-tabs, .technique-tabs { display: flex; justify-content: center; gap: var(--space-xs); margin-bottom: var(--space-md); flex-wrap: wrap; }
.vocab-tab, .tech-tab { padding: var(--space-xs) var(--space-md); background: transparent; border: 2px solid var(--color-ink); cursor: pointer; font-family: var(--font-body); font-size: 0.9rem; letter-spacing: 0.05em; transition: all var(--transition-fast); }
.vocab-tab:hover, .vocab-tab.active, .tech-tab:hover, .tech-tab.active { background: var(--color-ink); color: var(--color-paper); }
.vocab-panel, .technique-panel { display: none; }
.vocab-panel.active, .technique-panel.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.vocab-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-sm); }
.vocab-card { display: flex; flex-direction: column; padding: var(--space-md); background: white; border: 1px solid rgba(26, 26, 26, 0.1); transition: all var(--transition-fast); }
.vocab-card:hover { border-color: var(--color-accent); transform: translateY(-3px); }
.vocab-card.highlight { border-left: 4px solid var(--color-accent); }
.vocab-jp { font-family: var(--font-jp); font-size: 1.6rem; color: var(--color-accent); margin-bottom: var(--space-xs); }
.vocab-romaji { font-size: 1rem; font-weight: 500; margin-bottom: var(--space-xs); }
.vocab-meaning { font-size: 0.9rem; color: #555; }

/* Techniques */
.techniques-section { background: var(--color-paper-dark); }
.technique-category { background: white; margin-bottom: var(--space-md); border: 1px solid rgba(26, 26, 26, 0.1); }
.category-header { padding: var(--space-md); border-bottom: 1px solid rgba(26, 26, 26, 0.1); display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-sm); }
.category-kanji { font-family: var(--font-jp); font-size: 2rem; color: var(--color-accent); }
.category-header h3 { font-size: 1.2rem; font-weight: 500; }
.category-count { font-size: 0.85rem; color: #888; }
.category-desc { font-size: 0.9rem; color: #666; margin-left: auto; }
.technique-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1px; background: rgba(26, 26, 26, 0.05); }
.tech-item { display: flex; flex-direction: column; padding: var(--space-sm) var(--space-md); background: white; transition: background var(--transition-fast); }
.tech-item:hover { background: var(--color-paper); }
.tech-item.prohibited { background: #fff5f5; }
.tech-item.prohibited:hover { background: #ffeeee; }
.tech-name { font-weight: 500; font-size: 0.95rem; margin-bottom: 2px; }
.tech-meaning { font-size: 0.85rem; color: #666; }

/* Footer */
.main-footer { background: var(--color-ink); color: var(--color-paper); padding: var(--space-lg) 0 var(--space-md); }
.footer-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-md); }
.footer-kanji { font-family: var(--font-jp); font-size: 2.5rem; color: var(--color-accent); }
.footer-name { font-size: 1.2rem; font-weight: 500; display: block; margin-top: var(--space-xs); }
.footer-brand p { font-size: 0.85rem; color: rgba(247, 245, 240, 0.6); margin-top: var(--space-xs); }
.footer-info { text-align: right; }
.footer-info p { font-size: 0.9rem; color: rgba(247, 245, 240, 0.8); }
.footer-quote { font-style: italic; color: rgba(247, 245, 240, 0.5); margin-top: var(--space-xs); }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-paper); flex-direction: column; padding: var(--space-md); gap: var(--space-sm); border-bottom: 1px solid rgba(26, 26, 26, 0.1); }
    .nav-links.active { display: flex; }
    .mobile-menu-btn { display: flex; }
    .belt-card { flex-direction: column; text-align: center; }
    .category-header { flex-direction: column; text-align: center; }
    .category-desc { margin-left: 0; }
    .footer-content { flex-direction: column; text-align: center; }
    .footer-info { text-align: center; }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    .values-grid { grid-template-columns: repeat(2, 1fr); }
    .vocab-grid { grid-template-columns: 1fr; }
    .technique-grid { grid-template-columns: 1fr; }
}

@media print {
    .main-nav, .cta-button, .vocab-tabs, .technique-tabs, .lang-toggle { display: none; }
    .section { page-break-inside: avoid; }
    body { background: white; color: black; }
    .vocab-panel, .technique-panel { display: block !important; }
}