/* ===================================
   Discography Page - Main Stylesheet
   Version: 1.0.0
   Last Updated: 2026-02-10
   =================================== */

/* CSS変数（メインサイトと同じ） */
:root {
    --primary-color: #7DD3FC;
    --primary-light: #BAE6FD;
    --primary-dark: #0EA5E9;
    --secondary-color: #C084FC;
    --accent-color: #F472B6;
    --text-dark: #1F2937;
    --text-gray: #64748B;
    --white: #FFFFFF;
    --background: #F0F9FF;
    --border-color: #E0F2FE;
    
    --gradient-main: linear-gradient(135deg, #7DD3FC 0%, #C084FC 100%);
    --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #F0F9FF 100%);
    
    --shadow-sm: 0 2px 8px rgba(125, 211, 252, 0.1);
    --shadow-md: 0 4px 15px rgba(125, 211, 252, 0.15);
    --shadow-lg: 0 8px 25px rgba(125, 211, 252, 0.2);
    --shadow-xl: 0 12px 40px rgba(125, 211, 252, 0.25);
    
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    --font-main: 'Noto Sans JP', sans-serif;
    --font-accent: 'Poppins', sans-serif;
}

/* リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background: var(--background);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===================================
   ヘッダー
   =================================== */
.header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav {
    padding: 1.5rem 0;
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-dark);
    text-decoration: none;
    font-family: var(--font-accent);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-main);
    border-radius: 3px;
}

/* ===================================
   ヒーローセクション（小）
   =================================== */
.hero-small {
    padding: 6rem 0 4rem;
    background: var(--gradient-main);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-small::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 20s linear infinite;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
    font-family: var(--font-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
    z-index: 1;
}

.page-title i {
    font-size: 2.5rem;
}

.page-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

/* ===================================
/* ===================================
   ディスコグラフィグリッド
   =================================== */
.discography-section {
    padding: 2rem 0 6rem;
}

.discography-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 3rem;
    animation: fadeIn 0.6s ease;
}

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

/* アルバムカード */
.album-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    cursor: pointer;
}

.album-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.album-cover {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 1:1 アスペクト比 */
    overflow: hidden;
    background: var(--gradient-card);
}

.album-image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary-light);
    background: var(--gradient-card);
}

.album-image-placeholder i {
    animation: spin 3s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 実際の画像を使う場合 */
.album-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.album-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(125, 211, 252, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.album-overlay i {
    font-size: 3rem;
    color: var(--white);
}

.album-card:hover .album-overlay {
    opacity: 1;
}

.album-info {
    padding: 1.5rem;
    text-align: center;
}

.album-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.album-year {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 0.8rem;
}

.album-category {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--gradient-main);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===================================
   モーダル（ポップアップ）
   =================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    background: var(--white);
    border-radius: 25px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
    animation: slideUp 0.4s ease;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    background: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-gray);
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: rotate(90deg);
}

.modal-body {
    display: flex;
    gap: 3rem;
    padding: 3rem;
}

.modal-left {
    flex: 0 0 350px;
}

.modal-album-cover {
    width: 100%;
    padding-top: 100%;
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.album-image-placeholder.large {
    font-size: 6rem;
}

.modal-right {
    flex: 1;
}

.modal-category {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: var(--gradient-main);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.modal-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-family: var(--font-accent);
}

.modal-year {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-description {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--gradient-card);
    border-left: 4px solid var(--primary-color);
    border-radius: 10px;
}

.modal-description p {
    line-height: 1.8;
    color: var(--text-gray);
}

.modal-tracklist {
    margin-bottom: 2rem;
}

.modal-tracklist h4 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-tracklist ol {
    padding-left: 1.5rem;
}

.modal-tracklist li {
    padding: 0.5rem 0;
    color: var(--text-gray);
    border-bottom: 1px solid var(--border-color);
}

.modal-tracklist li:last-child {
    border-bottom: none;
}

.modal-player {
    margin-bottom: 2rem;
}

.modal-player h4 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.player-embed {
    background: var(--gradient-card);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
}

.player-placeholder {
    color: var(--text-gray);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
}

.player-placeholder i {
    font-size: 2rem;
    color: var(--primary-color);
}

.modal-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.modal-btn {
    flex: 1;
    min-width: 200px;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.modal-btn.booth {
    background: linear-gradient(135deg, #FF9800, #F57C00);
    color: var(--white);
}

.modal-btn.booth:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.modal-btn.youtube {
    background: linear-gradient(135deg, #FF0000, #C62828);
    color: var(--white);
}

.modal-btn.youtube:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   フッター
   =================================== */
.footer {
    background: var(--white);
    padding: 3rem 0;
    text-align: center;
    border-top: 2px solid var(--border-color);
    margin-top: 4rem;
}

.footer p {
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.footer a:hover {
    text-decoration: underline;
}

/* ===================================
   レスポンシブ
   =================================== */
@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .filter-buttons {
        flex-direction: column;
    }
    
    .filter-btn {
        width: 100%;
        justify-content: center;
    }
    
    .discography-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 2rem;
    }
    
    .modal-body {
        flex-direction: column;
        padding: 2rem;
    }
    
    .modal-left {
        flex: none;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .modal-title {
        font-size: 1.8rem;
    }
    
    .modal-links {
        flex-direction: column;
    }
    
    .modal-btn {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .page-title {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .discography-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
}