/*
 * 校異源氏物語テキストDB - 共通スタイル
 * ビューア (mirador.xsl) とトップページで統一したアカデミックデザイン
 */

:root {
    --color-primary: #2c3e50;
    --color-accent: #8b4513;
    --color-text: #333;
    --color-bg: #fafafa;
    --color-border: #e0d8cf;
    --color-persName: #1565c0;
    --color-placeName: #e65100;
    --font-body: "Noto Serif JP", "Yu Mincho", "YuMincho", serif;
    --font-ui: "Noto Sans JP", "Yu Gothic", "YuGothic", sans-serif;
    --shadow-soft: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
}

*, *::before, *::after {
    box-sizing: border-box;
}

* {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ui);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    margin: 0;
    padding: 0;
}

.jp-text {
    font-family: var(--font-body);
}

a {
    color: var(--color-accent);
    transition: color 0.2s;
}

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

/* ========================================
   Navbar (Bootstrap overrides)
   ======================================== */
.site-navbar {
    background: var(--color-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    padding: 0.5rem 0;
}

.site-navbar .navbar-brand {
    font-family: var(--font-body);
    font-weight: 600;
    color: #fff !important;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
}

.site-navbar .nav-link {
    color: rgba(255,255,255,0.8) !important;
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.site-navbar .nav-link:hover,
.site-navbar .nav-link.active {
    color: #fff !important;
}

.site-navbar .navbar-toggler {
    border-color: rgba(255,255,255,0.3);
    color: #fff;
}

.site-navbar .navbar-toggler-icon {
    color: #fff;
}

.site-navbar .dropdown-menu {
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, #3d566e 100%);
    color: #fff;
    padding: 5rem 0 4rem;
    margin-top: 56px;
}

.hero-title {
    font-family: var(--font-body);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-family: var(--font-ui);
    font-size: 1.1rem;
    opacity: 0.85;
    max-width: 600px;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 1.75rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
}

/* ========================================
   Section Titles
   ======================================== */
.section-title {
    font-family: var(--font-body);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 2rem;
    position: relative;
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* ========================================
   Cards
   ======================================== */
.content-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.content-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--color-accent);
}

.content-card-body {
    padding: 1.5rem;
}

/* Feature cards */
.feature-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 2rem;
    transition: box-shadow 0.2s, border-color 0.2s;
    height: 100%;
}

.feature-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--color-accent);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    background: var(--color-primary);
}

.feature-icon img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

/* ========================================
   Volume Titles & Action Buttons
   ======================================== */
.volume-title {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.action-btn {
    padding: 0.5rem 0.5rem;
    border-radius: 4px;
    text-decoration: none;
    text-align: center;
    transition: all 0.2s;
    font-family: var(--font-ui);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    white-space: nowrap;
}

.action-btn:hover {
    text-decoration: none;
    opacity: 0.85;
}

.btn-primary-custom {
    background: var(--color-primary);
    color: #fff;
    border: none;
}

.btn-primary-custom:hover {
    color: #fff;
}

.btn-accent-custom {
    background: var(--color-accent);
    color: #fff;
    border: none;
}

.btn-accent-custom:hover {
    color: #fff;
}

.btn-secondary-custom {
    background: #fff;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary-custom:hover {
    color: var(--color-primary);
    border-color: var(--color-accent);
}

@media (max-width: 768px) {
    .action-buttons {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   News Section
   ======================================== */
.news-section {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 2rem;
}

.news-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

.news-date {
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 500;
    font-family: var(--font-ui);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background: var(--color-primary);
    color: rgba(255,255,255,0.7);
    padding: 2rem 0;
    font-size: 0.85rem;
}

.site-footer a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
}

.site-footer a:hover {
    color: #fff;
}


/* ========================================
   Utility
   ======================================== */
.text-accent {
    color: var(--color-accent);
}

.bg-section {
    background: #f5f3f0;
}