/* ========================================
   長崎北陽台高等学校同窓会 - モダンスタイル
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - より見やすい配色に変更 */
    --color-primary: #0058A2;        /* ネイビーブルー（日新火災参考） */
    --color-primary-light: #3A7FBA;  /* 明るいネイビー */
    --color-primary-dark: #003D6F;   /* 濃いネイビー */
    --color-secondary: #EA7C75;      /* コーラルレッド（アクセント） */
    --color-secondary-light: #F09B95; /* 明るいコーラル */
    --color-secondary-dark: #D65B54;  /* 濃いコーラル */

    --color-background: #ffffff;
    --color-surface: #F8FAFB;        /* より薄いグレー */
    --color-text: #333333;           /* ダークグレー（黒より読みやすい） */
    --color-text-muted: #6B7280;     /* ミディアムグレー */
    --color-border: #E5E7EB;         /* 薄いボーダー */

    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;

    /* Semantic Color Variables（ハードコード色を変数で統一） */
    --color-info-bg: #E8F3FF;
    --color-info-border: #B8DAFF;
    --color-info-text: var(--color-primary);
    --color-warning-bg: #FEF3C7;
    --color-warning-border: #F59E0B;
    --color-warning-text: #92400E;
    --color-success-bg: #DCFCE7;
    --color-success-border: #16A34A;
    --color-success-text: #15803D;
    --color-danger-bg: #FEF2F2;
    --color-danger-border: #DC2626;
    --color-danger-text: #DC2626;
    --color-required: #DC2626;

    /* Typography - より読みやすいサイズに */
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-md: 1.125rem;   /* 18px */
    --font-size-lg: 1.25rem;    /* 20px */
    --font-size-xl: 1.5rem;     /* 24px */
    --font-size-xxl: 1.75rem;   /* 28px */
    --line-height-base: 1.8;    /* より広い行間 */

    /* Spacing - より広い余白 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Layout */
    --container-max-width: 1200px;
    --header-height: auto;

    /* Transitions */
    --transition-base: 0.2s ease;

    /* Shadows - より柔らかい影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Footer */
    --footer-bg: #003D6F;
    --footer-text: #CBD5E1;
    --footer-heading: #FFFFFF;
    --footer-link-hover: var(--color-secondary);
}

/* Dark Mode — 将来復活可能なためコメントアウト
@media (prefers-color-scheme: dark) {
    :root {
        --color-background: #1a1a1a;
        --color-surface: #242424;
        --color-text: #e5e5e5;
        --color-text-muted: #a0a0a0;
        --color-border: #3a3a3a;
        --color-primary: #4d8fd4;
        --color-primary-light: #6ba3ff;
        --color-primary-dark: #2d6fa8;
        --color-secondary: #f09b95;
        --color-secondary-light: #ff9970;
        --color-info-bg: #0a1a2e;
        --color-info-border: #1e4a7a;
        --color-info-text: #6ba3ff;
        --color-warning-bg: #2a2000;
        --color-warning-border: #7a5a00;
        --color-warning-text: #f0c030;
        --color-success-bg: #0a1e0f;
        --color-success-border: #16a34a;
        --color-success-text: #22c55e;
        --color-danger-bg: #1e0a0a;
        --color-danger-border: #7a1a1a;
        --color-danger-text: #f87171;
        --color-required: #f87171;
        --header-bg: rgba(26, 26, 26, 0.98);
        --footer-bg: #001a3a;
        --footer-text: #94a3b8;
        --footer-heading: #e2e8f0;
        --notice-bg: #2a2600;
        --highlight-bg: #001a2e;
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    }
}
*/

/* ========================================
   Base Styles
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: var(--font-size-base);
    font-weight: 400;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

/* ========================================
   Accessibility & Focus Styles
   ======================================== */

/* Focus styles for keyboard navigation */
:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Better focus for buttons and links */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 88, 162, 0.2);
}

/* Remove outline for mouse users */
:focus:not(:focus-visible) {
    outline: none;
    box-shadow: none;
}

/* Focus visible for keyboard users only */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 88, 162, 0.2);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :focus {
        outline-width: 3px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(1.875rem, 4vw, 2.5rem);  /* より控えめなサイズ */
    font-weight: 600;
    letter-spacing: 0.02em;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    letter-spacing: 0.01em;
}

h3 {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 500;
}

p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-text);
}

/* ========================================
   Layout Components
   ======================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ========================================
   Header
   ======================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--header-bg, rgba(255, 255, 255, 0.98));
    backdrop-filter: blur(4px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo::before {
    content: '';
    display: block;
    width: 4px;
    height: 1.4em;
    background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.logo:hover .logo-text {
    color: var(--color-primary-dark);
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1rem;
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    font-weight: 400;
    font-size: var(--font-size-base);
    color: var(--color-text);
    padding: var(--spacing-sm) 0;
    position: relative;
    letter-spacing: 0.01em;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.active::after {
    background: var(--color-secondary);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    list-style: none;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
}

.dropdown-menu a:hover {
    background: var(--color-surface);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

/* Responsive adjustments for hero */
@media (max-width: 768px) {
    .hero {
        min-height: 70vh;
    }
    
    .hero-bg::after {
        height: 60px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        right: -100%;
        width: 80%;
        height: calc(100vh - 60px);
        background: var(--color-background);
        flex-direction: column;
        padding: var(--spacing-xl) var(--spacing-lg);
        gap: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-base);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--color-primary);
        margin-top: var(--spacing-sm);
        margin-left: var(--spacing-md);
    }
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(160deg, #002855, #0058A2);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(234, 124, 117, 0.10) 0%, transparent 60%);
    z-index: 1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, #fff);
    z-index: 2;
}

.hero-content {
    padding: var(--spacing-xxl) 0;
    position: relative;
    z-index: 10;
    text-align: center;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-content .container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    color: white;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.2em;
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: white;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

/* Hero Decoration */
.hero-decoration {
    display: none;
}

/* Hero Button Styles on gradient background */
.hero .btn-primary {
    background: white;
    color: var(--color-primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.hero .btn-primary:hover {
    background: var(--color-surface);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.hero .btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.hero .btn-secondary:hover {
    background: white;
    color: var(--color-primary);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: var(--font-size-base);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    letter-spacing: 0.02em;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn::before {
    display: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 88, 162, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 88, 162, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 88, 162, 0.3);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 88, 162, 0.3);
}

.btn-warning {
    background: var(--color-warning-border);
    color: var(--color-warning-text);
    font-weight: 600;
    border-color: var(--color-warning-border);
    box-shadow: 0 2px 4px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
    background: #D97706;
    border-color: #D97706;
    color: var(--color-warning-text);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.4);
}

/* ========================================
   Sections
   ======================================== */

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: var(--color-secondary);
    border-radius: var(--radius-full);
    margin: var(--spacing-sm) auto 0;
}

.section-actions {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Notice Section */
.notice-section {
    background: var(--color-surface);
    padding: var(--spacing-lg) 0;
}

.notice-card {
    background: var(--notice-bg, #FFFBEB);
    border: 1px solid #FCD34D;
    border-radius: 8px;
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.notice-title {
    color: var(--color-warning-text);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-md);
    font-weight: 500;
}

.notice-card p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* News Section */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.news-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.news-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-top-color: var(--color-secondary);
}

.news-image {
    height: 200px;
    overflow: hidden;
}

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

.news-card:hover .news-image img {
    transform: none;
}

.news-content {
    padding: var(--spacing-lg);
}

.news-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 400;
    white-space: nowrap;
}

.news-title {
    margin: var(--spacing-sm) 0;
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 1.6;
}

.news-excerpt {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.news-link {
    font-weight: 500;
}

/* Links Section */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.link-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-bottom: 3px solid transparent;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
    display: block;
}

.link-card:hover {
    background: var(--color-surface);
    color: var(--color-text);
    border-bottom-color: var(--color-secondary);
    box-shadow: var(--shadow-sm);
}

.link-card h3 {
    margin-bottom: var(--spacing-sm);
}

.link-card p {
    margin: 0;
    color: var(--color-text-muted);
}

.link-card:hover p {
    color: var(--color-text-muted);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.04) 0%, transparent 70%);
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-title {
    color: white;
    font-weight: 600;
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.cta-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    color: #FFFFFF;
    opacity: 1;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* CTA Button Style Override */
.cta-section .btn-primary {
    background: white;
    color: var(--color-primary);
    border: 2px solid white;
    padding: var(--spacing-sm) var(--spacing-xl);
    font-size: 1.125rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.cta-section .btn-primary:hover {
    background: transparent;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.cta-section .btn-primary:active {
    transform: translateY(0);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    border-top: 4px solid var(--color-secondary);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-md);
    color: var(--footer-heading);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section p {
    color: var(--footer-text);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--footer-text);
    transition: color var(--transition-base);
}

.footer-section a:hover {
    color: var(--footer-link-hover, var(--color-secondary));
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(203, 213, 225, 0.6);
    font-size: var(--font-size-sm);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ========================================
   Responsive Images
   ======================================== */

img[loading="lazy"] {
    background: var(--color-surface);
}

/* ========================================
   Loading State
   ======================================== */

.loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 9999;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    margin-top: var(--spacing-md);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   Skip Link
   ======================================== */

.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 4px 0;
    transition: top 0.2s;
    white-space: nowrap;
}

.skip-link:focus {
    top: 0;
}

/* Hide from visual users but keep for screen readers */
.skip-link:not(:focus) {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Breadcrumb Navigation
   ======================================== */

/* ========================================
   Back to Top Button
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 40px;
        height: 40px;
    }
}

/* ========================================
   Error State
   ======================================== */

.error-container {
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.error-content {
    max-width: 600px;
    margin: 0 auto;
}

.error-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.error-message {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Dynamic Content Area
   ======================================== */

.content-area {
    min-height: 400px;
    animation: fadeIn 0.3s ease-in-out;
}

.loaded-content {
    animation: slideIn 0.3s ease-in-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .header,
    .footer,
    .mobile-menu-btn,
    .hero-actions,
    .section-actions,
    .back-to-top,
    .skip-link,
    .loading {
        display: none !important;
    }
    
    body {
        color: black;
        background: white;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .content-area {
        min-height: auto;
    }
}

/* ========================================
   Content Pages
   ======================================== */

/* Page Header */
.page-header {
    background: var(--color-surface);
    border-bottom: 3px solid var(--color-primary);
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--color-secondary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.page-title {
    margin: 0;
}

/* Content Layout */
.content-section {
    padding-top: 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
}

@media (max-width: 968px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
}

.content-article {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-xl);
}

.content-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.content-meta {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.content-body {
    line-height: 1.8;
}

.content-body p {
    margin-bottom: var(--spacing-md);
}

.content-body ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.content-body li {
    margin-bottom: var(--spacing-sm);
}

/* Content Elements */
.highlight-box,
.info-box,
.contact-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.highlight-box {
    background: var(--highlight-bg, var(--color-info-bg));
    border-color: var(--color-info-border);
}

.highlight-box h3,
.highlight-box h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.info-box h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-box {
    background: var(--color-warning-bg);
    border-color: var(--color-warning-border);
}

.contact-box h4 {
    color: var(--color-warning-text);
    margin-bottom: var(--spacing-sm);
}

.email {
    font-size: 1.125rem;
    margin: var(--spacing-md) 0;
}

.note {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.organizers {
    margin-top: var(--spacing-lg);
}

.organizers h4 {
    margin-bottom: var(--spacing-sm);
}

.organizers ul {
    list-style: none;
    padding: 0;
}

.update-section {
    margin-bottom: var(--spacing-xl);
}

.update-section h3 {
    font-size: 1.125rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.content-divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-xl) 0;
}

.highlight-info {
    background: var(--color-info-bg);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.content-image {
    margin: var(--spacing-xl) 0;
    text-align: center;
}

.content-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.content-image.large img {
    max-width: 600px;
    margin: 0 auto;
}

.content-image figcaption {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.related-links {
    background: var(--color-surface);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.related-links h3 {
    margin-bottom: var(--spacing-md);
}

.link-button {
    text-align: center;
}

.external-icon {
    margin-left: var(--spacing-xs);
}

.content-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

/* Sidebar */
.content-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.sidebar-section {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
}

.sidebar-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.sidebar-links {
    list-style: none;
    padding: 0;
}

.sidebar-links li {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-links li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.sidebar-links a {
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.sidebar-links a:hover {
    color: var(--color-primary);
}

/* ========================================
   ページ固有スタイル: contact.html
   ======================================== */

.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-section {
    background: var(--color-surface);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.contact-method {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.contact-method h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-email {
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 500;
    display: inline-block;
    margin: var(--spacing-sm) 0;
}

.contact-note {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    color: var(--color-warning-text);
}

.contact-address {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-partner {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.contact-partner h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.partner-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.partner-name {
    font-weight: 700;
    color: var(--color-text);
}

.partner-tel {
    color: var(--color-primary);
    font-weight: 500;
}

.partner-hours {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.icon {
    width: 24px;
    height: 24px;
}

.contact-form {
    margin-top: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text);
}

.required {
    color: var(--color-required);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: var(--font-size-base);
    transition: border-color 0.2s ease;
    background-color: white;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group select {
    cursor: pointer;
}

.form-message {
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-top: var(--spacing-lg);
    display: none;
}

.form-message.success {
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    color: var(--color-success-text);
}

.form-message.error {
    background: var(--color-danger-bg);
    border: 1px solid var(--color-danger-border);
    color: var(--color-danger-text);
}

/* ========================================
   ページ固有スタイル: news.html
   ======================================== */

.news-list {
    margin-top: var(--spacing-xl);
}

.news-item {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
}

.news-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-left-color: var(--color-secondary);
}

.news-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.news-item-date {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.news-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-surface);
    border-radius: 4px;
    font-size: var(--font-size-sm);
    color: var(--color-primary);
}

.news-item-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.news-item-excerpt {
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.news-item-link {
    color: var(--color-primary);
    font-weight: 500;
    text-decoration: none;
}

.news-item-link:hover {
    text-decoration: underline;
}

.year-section {
    margin-bottom: var(--spacing-xxl);
}

.year-title {
    font-size: 1.5rem;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   ページ固有スタイル: events.html
   ======================================== */

.events-container {
    margin-top: var(--spacing-xl);
}

.event-status {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.event-status-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-muted);
}

.event-status h2 {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.event-status p {
    color: var(--color-text-muted);
    line-height: 1.8;
}

.event-info {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.event-info h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.event-contact {
    background: var(--color-surface);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.event-contact-email {
    font-size: 1.125rem;
    color: var(--color-primary);
    font-weight: 500;
}

.event-card {
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.event-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
}

.event-card-header h2 {
    color: white;
    margin: 0;
    font-size: 1.5rem;
}

.event-details {
    margin: var(--spacing-lg) 0;
}

.event-detail-item {
    display: flex;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.event-detail-label {
    font-weight: 500;
    min-width: 120px;
    color: var(--color-text);
}

.event-detail-value {
    flex: 1;
    color: var(--color-text);
}

.event-description {
    background: var(--color-surface);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    line-height: 1.8;
}

.event-line-group {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.event-line-group h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.event-organizers {
    background: var(--color-surface);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.event-organizers h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.past-events-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 8px;
    font-weight: 500;
    transition: all var(--transition-base);
    margin-top: var(--spacing-xl);
}

.past-events-link:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

/* ========================================
   ページ固有スタイル: news-all（お知らせ全件）
   ======================================== */

.news-archive-table {
    width: 100%;
    background: var(--color-background);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
}

.news-archive-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.news-archive-table th {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 500;
    position: sticky;
    top: 0;
}

.news-archive-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.news-archive-table tr:hover {
    background: var(--color-surface);
}

.news-title a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
}

.news-title a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.year-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-weight: 400;
    color: var(--color-text);
    border: none;
}

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

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

.table-scroll-hint {
    display: none;
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
}

@media (max-width: 768px) {
    .table-scroll-hint {
        display: block;
    }
}

/* ========================================
   ページ固有スタイル: privacy（プライバシーポリシー）
   ======================================== */

.privacy-container {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-content {
    background: var(--color-surface);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.privacy-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
}

.privacy-intro {
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-background);
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
}

.policy-section {
    margin-bottom: var(--spacing-xl);
}

.policy-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: 1rem;
    font-weight: 500;
}

.policy-section p,
.policy-section ul {
    line-height: 1.8;
    color: var(--color-text);
}

.policy-section ul {
    margin-left: 2rem;
    margin-top: var(--spacing-sm);
}

.policy-section ul li {
    margin-bottom: var(--spacing-sm);
}

.policy-date {
    text-align: right;
    margin-top: var(--spacing-xl);
    color: var(--color-text);
}

.policy-signature {
    text-align: right;
    margin-top: var(--spacing-md);
    line-height: 1.8;
}

.contact-info {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.contact-info h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.warning-note {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    color: var(--color-warning-text);
}

/* ========================================
   ページ固有スタイル（HTMLから移行）
   ======================================== */

/* ----- about/index.html ----- */
.about-container {
    max-width: 900px;
    margin: 0 auto;
}

.about-section {
    background: var(--color-background);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.about-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.about-card:hover {
    box-shadow: var(--shadow-md);
    border-top-color: var(--color-secondary);
}

.about-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-card p {
    line-height: 1.7;
    flex-grow: 1;
}

.about-card .card-link {
    margin-top: var(--spacing-md);
    font-weight: 500;
    color: var(--color-primary);
    align-self: flex-end;
}

/* ----- about/greeting.html ----- */
.greeting-container {
    max-width: 800px;
    margin: 0 auto;
}

.greeting-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.greeting-title {
    font-size: var(--font-size-xxl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.greeting-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.author-info {
    text-align: left;
}

.author-title {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.author-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}

.author-photo {
    width: 90px;
    height: 105px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.author-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.greeting-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.greeting-text {
    line-height: 2;
    color: var(--color-text);
    text-align: justify;
}

.greeting-text p {
    margin-bottom: var(--spacing-lg);
    text-indent: 1em;
}

/* ----- about/officers.html ----- */
.officers-container {
    max-width: 900px;
    margin: 0 auto;
}

.officers-table {
    width: 100%;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.officers-table table {
    width: 100%;
    border-collapse: collapse;
}

.officers-table th {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 500;
}

.officers-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.officers-table tr:last-child td {
    border-bottom: none;
}

.officers-table tr:hover {
    background: var(--color-surface);
}

.info-note {
    background: var(--color-surface);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.info-note p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
}

.info-note p:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .officers-table {
        box-shadow: none;
        border: 1px solid var(--color-border);
    }

    .officers-table th,
    .officers-table td {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
}

/* ----- about/directors.html ----- */
.directors-container {
    max-width: 1000px;
    margin: 0 auto;
}

.directors-table {
    width: 100%;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
}

.directors-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.directors-table th {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md);
    text-align: center;
    font-weight: 500;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.directors-table th:last-child {
    border-right: none;
}

.directors-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.directors-table tr:last-child td {
    border-bottom: none;
}

.directors-table tr:hover {
    background: var(--color-surface);
}

.year-cell {
    font-weight: 500;
    color: var(--color-primary);
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
}

.name-cell {
    font-weight: 400;
}

.empty-cell {
    color: var(--color-text-muted);
}

/* ----- about/class-reps.html ----- */
.class-reps-container {
    max-width: 1000px;
    margin: 0 auto;
}

.year-header {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-weight: 500;
}

.year-info {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

.class-table {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.class-table table {
    width: 100%;
    border-collapse: collapse;
}

.class-table td {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    text-align: center;
}

.class-table tr:hover {
    background: var(--color-surface);
}

.class-number {
    font-weight: 500;
    color: var(--color-primary);
    margin-right: var(--spacing-sm);
}

.navigation-hint {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .class-table {
        font-size: var(--font-size-sm);
    }
}

/* ----- about/rules.html ----- */
.rules-container {
    max-width: 800px;
    margin: 0 auto;
}

.rules-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.rules-title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    text-align: center;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
}

.chapter-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    text-align: center;
}

.article {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.article-number {
    font-weight: 500;
    color: var(--color-text);
}

.article-item {
    margin-left: 2rem;
    margin-bottom: var(--spacing-sm);
}

.sub-item {
    margin-left: 3rem;
    margin-bottom: var(--spacing-sm);
}

.appendix {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--color-border);
}

.appendix-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

/* ----- about/branches.html ----- */
.branches-container {
    max-width: 1000px;
    margin: 0 auto;
}

.branches-intro {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.branch-card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.branch-card:hover {
    box-shadow: var(--shadow-md);
}

.branch-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: var(--spacing-lg);
}

.branch-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.branch-content {
    padding: var(--spacing-lg);
}

.branch-contact {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.contact-label {
    font-weight: 500;
    color: var(--color-text);
    min-width: 100px;
}

.contact-value {
    color: var(--color-text);
    flex: 1;
}

.email-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

.branch-events {
    margin-top: var(--spacing-lg);
}

.events-title {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.events-list {
    list-style: none;
    padding: 0;
    max-height: 300px;
    overflow-y: auto;
}

.events-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.events-list li:last-child {
    border-bottom: none;
}

.events-list a {
    color: var(--color-primary);
    text-decoration: none;
    display: block;
    transition: all var(--transition-base);
}

.events-list a:hover {
    color: var(--color-primary-dark);
    padding-left: var(--spacing-sm);
}

.branch-note {
    background: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
    color: var(--color-text);
    line-height: 1.8;
}

.external-link {
    font-size: var(--font-size-sm);
    vertical-align: super;
}

/* ----- culture/kouka.html, culture/sekibetsufu.html ----- */
.song-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.song-image {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

.song-image img {
    max-width: 800px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.pdf-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-base);
}

.pdf-link:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

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

/* ----- caution.html ----- */
.caution-content {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.caution-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-lg) 0;
}

.caution-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.caution-list li::before {
    content: "⚠";
    position: absolute;
    left: 0;
    color: var(--color-warning-border);
    font-size: 1.2rem;
}

.page-content {
    max-width: 800px;
    margin: 0 auto;
}

.emphasis {
    color: var(--color-danger-text);
    font-weight: 500;
}

/* ----- events-archive.html ----- */
.archive-container {
    margin-top: var(--spacing-xl);
}

.archive-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

.archive-table {
    width: 100%;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
}

.archive-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px;
}

.archive-table th {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 500;
    white-space: nowrap;
}

.archive-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.archive-table tr:last-child td {
    border-bottom: none;
}

.archive-table tr:hover {
    background: var(--color-surface);
}

.event-date {
    white-space: nowrap;
    color: var(--color-text-muted);
}

.event-target {
    font-weight: 500;
    color: var(--color-primary);
}

.event-name {
    font-weight: 500;
}

.event-name a {
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--transition-base);
}

.event-name a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.event-location {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .archive-table th,
    .archive-table td {
        padding: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
}