/**
 * 写真ギャラリーサイト「四季彩キ録」
 * Main Stylesheet
 */

/*  =========================================
    CSS Variables
    ========================================= */
:root {
    /* Colors - Warm natural palette */
    --color-primary: #2d4a3e;
    --color-primary-light: #3d6a56;
    --color-primary-dark: #1d3028;
    --color-accent: #c4a35a;
    --color-accent-hover: #d4b36a;

    --color-bg: #faf8f5;
    --color-bg-alt: #f0ede8;
    --color-surface: #ffffff;

    --color-text: #2c2c2c;
    --color-text-muted: #666666;
    --color-text-light: #999999;
    --color-text-inverse: #ffffff;

    /* 額縁用カラー */
    --color-frame: #f5f3ef;
    --color-frame-border: #d4d0c8;
    --color-frame-shadow: rgba(0, 0, 0, 0.15);

    /* Typography - 明朝体をメインに */
    --font-serif: 'Noto Serif JP', 'Yu Mincho', serif;
    --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Layout */
    --container-max: 1200px;
    --header-height: 70px;

    /* Effects */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

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

body {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

button {
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
    color: inherit;
}

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

.main-content {
    min-height: calc(100vh - var(--header-height) - 100px);
}

/*  =========================================
    Header
    ========================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    height: var(--header-height);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.1em;
}

.site-logo a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.site-logo a:hover {
    color: var(--color-accent);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: var(--space-sm);
}

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    padding: 4px;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.is-active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.is-active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.is-active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-surface);
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-md);
    }

    .main-nav.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .nav-link {
        padding: var(--space-md);
        font-size: 1rem;
    }
}

/*  =========================================
    Hero Section
    ========================================= */
.hero {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
}

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

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 500;
    color: var(--color-text-inverse);
    letter-spacing: 0.2em;
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.15em;
}

/*  =========================================
    Sections
    ========================================= */
.section-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    text-align: center;
    margin-bottom: var(--space-2xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--color-accent);
    margin: var(--space-md) auto 0;
}

.categories-section,
.latest-section,
.gallery-section {
    padding: var(--space-3xl) 0;
}

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

/*  =========================================
    Category Cards
    ========================================= */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
}

.category-card {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    padding: var(--space-xl) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.category-card-content {
    text-align: center;
}

.category-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.category-count {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/*  =========================================
    Category Header
    ========================================= */
.category-header {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
}

.category-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-text-inverse);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.category-photo-count {
    font-family: var(--font-serif);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/*  =========================================
    Gallery Grid
    ========================================= */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
    /* 拡大時に画像がはみ出してもクリップされないようにパディングを追加 */
    padding: 10px;
    margin: -10px;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: visible;
    transition: all var(--transition-base);
}

/* ホバー時の全体的な挙動は photo-wrapper に移管 */


.gallery-item-image {
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* ホバー時のみoverflow:visibleにして拡大表示を可能に */
.gallery-item:hover .gallery-item-image {
    overflow: visible;
}

.photo-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition-slow);
    /* JSでサイズを制御 */
}

.photo-wrapper:hover {
    transform: scale(1.05);
    z-index: 10;
}

.gallery-item-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-slow);
}

/* 拡大は .photo-wrapper で行うため、ここでは不要 */

.gallery-item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 100%);
    color: var(--color-text-inverse);
    opacity: 0;
    /* 写真の拡大と同期するためトランジションを統一 */
    transition: opacity var(--transition-slow);
    pointer-events: none;
    /* オーバーレイ自体はクリックを邪魔しない */
}

.photo-wrapper:hover .gallery-item-overlay {
    opacity: 1;
}

.gallery-item-title {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.gallery-item-place {
    font-family: var(--font-serif);
    font-size: 0.8rem;
    opacity: 0.85;
}

/* =========================================
    Pagination
   ========================================= */
.pagination {
    margin-top: var(--space-2xl);
    text-align: center;
}

.pagination-list {
    display: inline-flex;
    gap: var(--space-xs);
}

.pagination-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-sm);
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.pagination-link:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.pagination-link.active {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

/*  =========================================
    Modal - 額縁（ギャラリー）デザイン
    ========================================= */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.is-open {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(20, 20, 20, 0.92);
}

/* モーダルコンテンツ - 写真のサイズに合わせる */
.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    width: fit-content;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px var(--color-frame-shadow);
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-base);
    overflow: hidden;
}

.modal.is-open .modal-content {
    transform: scale(1) translateY(0);
}

/* 閉じるボタン - 右下に配置 */
.modal-close {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    font-size: 1.75rem;
    font-weight: 300;
    z-index: 1001;
    transition: all var(--transition-fast);
    backdrop-filter: blur(4px);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1);
}

.modal-body {
    display: flex;
    flex-direction: column;
    max-height: calc(90vh - 16px);
    overflow: auto;
    width: fit-content;
}

/* 画像コンテナ - 黒枚なし */
.modal-image-container {
    flex-shrink: 0;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    min-height: 200px;
}

.modal-image {
    max-width: 100%;
    max-height: 55vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 0;
    /* 写真の角は丸めない */
}

/* 横長写真用スタイル */
.modal-body.is-landscape .modal-image-container {
    flex: 1;
    min-width: 0;
}

/* 縦長写真用スタイル */
.modal-body.is-portrait .modal-image-container {
    flex-shrink: 0;
}

/* 情報パネル */
.modal-info {
    padding: var(--space-xl);
    background: var(--color-surface);
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 1.54rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-lg);
    letter-spacing: 0.05em;
    line-height: 1.5;
    text-align: left;
}

.modal-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-sm) var(--space-xl);
    margin-bottom: var(--space-md);
    font-family: var(--font-serif);
    font-size: 1.045rem;
}

.modal-details dt {
    color: var(--color-text-muted);
    font-weight: 400;
}

.modal-details dd {
    color: var(--color-text);
}

.modal-caption {
    font-family: var(--font-serif);
    color: var(--color-text-muted);
    font-size: 0.99rem;
    line-height: 1.9;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-frame-border);
}

/* デスクトップレイアウト */
@media (min-width: 768px) {
    .modal-content {
        max-width: 1100px;
    }

    /* 横長写真: タイトルを下に（縦並び） */
    .modal-body.is-landscape {
        flex-direction: column;
        align-items: stretch;
    }

    .modal-body.is-landscape .modal-image-container {
        width: 100%;
        display: flex;
        justify-content: center;
    }

    .modal-body.is-landscape .modal-image {
        max-height: 65vh;
    }

    .modal-body.is-landscape .modal-info {
        width: 100%;
        border-top: 1px solid var(--color-frame-border);
    }

    /* 縦長写真: タイトルを右に（横並び） */
    .modal-body.is-portrait {
        flex-direction: row;
    }

    .modal-body.is-portrait .modal-image-container {
        flex: 1;
        min-width: 0;
    }

    .modal-body.is-portrait .modal-image {
        max-height: 75vh;
    }

    .modal-body.is-portrait .modal-info {
        width: 385px;
        flex-shrink: 0;
        border-top: none;
        border-left: 1px solid var(--color-frame-border);
        overflow-y: auto;
    }
}

/*  =========================================
    Photo Detail Page
    ========================================= */
.photo-detail {
    padding: var(--space-3xl) 0;
}

.photo-content {
    display: grid;
    gap: var(--space-2xl);
}

.photo-image-wrapper {
    text-align: center;
}

.photo-main-image {
    max-width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.photo-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.photo-meta {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-sm) var(--space-lg);
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    font-family: var(--font-serif);
}

.photo-meta dt {
    font-weight: 500;
    color: var(--color-text-muted);
}

.photo-caption {
    font-family: var(--font-serif);
    line-height: 2;
    color: var(--color-text);
}

.back-link {
    display: inline-block;
    margin-top: var(--space-xl);
    font-family: var(--font-serif);
    color: var(--color-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-accent);
}

@media (min-width: 768px) {
    .photo-content {
        grid-template-columns: 1fr 350px;
    }
}

/*  =========================================
    Footer
    ========================================= */
.site-footer {
    background: var(--color-primary-dark);
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
}

.copyright {
    font-family: var(--font-serif);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

/*  =========================================
    Utility Classes
    ========================================= */
.no-photos,
.not-found {
    text-align: center;
    padding: var(--space-3xl);
    font-family: var(--font-serif);
    color: var(--color-text-muted);
}

/* Loading State */
.is-loading {
    opacity: 0.5;
    pointer-events: none;
}