/* ========================================
   カスタムカラー変数（oklch）
   ======================================== */

:root {
    --background: oklch(1 0 0);
    --foreground: oklch(0.35 0 0);
    --card: oklch(0.98 0 0);
    --card-foreground: oklch(0.35 0 0);
    --primary: oklch(0.25 0 0);
    --primary-foreground: oklch(0.98 0 0);
    --muted: oklch(0.98 0 0);
    --muted-foreground: oklch(0.55 0 0);
    --border: oklch(0.93 0 0);
    --destructive: oklch(0.577 0.245 27.325);
    --radius: 0.625rem;
}

/* ========================================
   ベーススタイル
   ======================================== */

* {
    border-color: var(--border);
}

body {
    background-color: var(--background);
    color: var(--foreground);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* フォント */
.font-en {
    font-family: 'Montserrat', sans-serif;
}

.font-jp {
    font-family: 'Noto Sans JP', sans-serif;
}

/* カラーユーティリティ */
.text-primary { color: var(--primary); }
.text-foreground { color: var(--foreground); }
.text-muted-foreground { color: var(--muted-foreground); }
.text-destructive { color: var(--destructive); }
.bg-background { background-color: var(--background); }
.bg-card { background-color: var(--card); }
.bg-muted { background-color: var(--muted); }
.border-border { border-color: var(--border); }

/* ========================================
   カスタムスクロールバー
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #ffffff;
}

::-webkit-scrollbar-thumb {
    background: #e5e5e5;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #d4d4d4;
}

/* ========================================
   フェードアップアニメーション
   ======================================== */

.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1),
                transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   ヘッダー
   ======================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 40;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: box-shadow 0.3s ease;
}

.site-header.is-scrolled {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* ========================================
   モバイルメニュー
   ======================================== */

.mobile-menu {
    position: fixed;
    inset: 0;
    background-color: var(--background);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

/* ========================================
   ポートフォリオキャンバス（フリー配置）
   ======================================== */

.portfolio-canvas {
    overflow: hidden !important;
}

.portfolio-canvas-inner {
    container-type: inline-size !important;
    position: relative !important;
    width: 100% !important;
    /* aspect-ratio is set via media queries from PHP */
}

.canvas-item {
    position: absolute !important;
}

/* モバイルでもキャンバス配置（個別にCSS設定される） */

/* ========================================
   ポートフォリオアイテム（共通）
   ======================================== */

.portfolio-item-wrapper {
    display: flex;
    transition: transform 0.3s ease;
}

.portfolio-item {
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.portfolio-item .overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0);
    transition: background-color 0.5s ease;
    z-index: 10;
}

.portfolio-item:hover .overlay {
    background-color: rgba(0, 0, 0, 0.03);
}

.portfolio-item img.portfolio-img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.7s ease;
}

.portfolio-item:hover img.portfolio-img {
    transform: scale(1.05);
}

/* ========================================
   ライトボックス
   ======================================== */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.lightbox.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

.lightbox img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
}

.lightbox .close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    color: var(--muted-foreground);
    cursor: pointer;
    transition: color 0.3s ease;
    background: none;
    border: none;
    padding: 0.5rem;
}

.lightbox .close-btn:hover {
    color: var(--primary);
}

/* ========================================
   Works セクション
   ======================================== */

.work-item {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 768px) {
    .work-item {
        flex-direction: row;
    }
    .work-item.reverse {
        flex-direction: row-reverse;
    }
    .work-item.reverse .work-text {
        text-align: right;
    }
}

.work-image {
    width: 100%;
    aspect-ratio: 16/9;
    position: relative;
    overflow: hidden;
    background-color: var(--muted);
}

@media (min-width: 768px) {
    .work-image {
        width: 60%;
        flex-shrink: 0;
    }
    .work-text {
        width: 40%;
    }
}

.work-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========================================
   フッター
   ======================================== */

.site-footer {
    background-color: var(--card);
    padding-top: 6rem;
    padding-bottom: 3rem;
}

/* ========================================
   管理画面
   ======================================== */

.admin-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.admin-card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

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

/* フォーム要素 */
.form-input, .form-select, .form-textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) - 2px);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.05);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--foreground);
}

/* ボタン */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: calc(var(--radius) - 2px);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--primary-foreground);
}
.btn-primary:hover {
    opacity: 0.9;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border);
    color: var(--foreground);
}
.btn-outline:hover {
    background-color: var(--muted);
}

.btn-danger {
    background-color: transparent;
    color: var(--destructive);
    border-color: var(--destructive);
}
.btn-danger:hover {
    background-color: oklch(0.577 0.245 27.325 / 0.05);
}

.btn-ghost {
    background: none;
    border: none;
    color: var(--muted-foreground);
    padding: 0.375rem;
}
.btn-ghost:hover {
    color: var(--primary);
    background-color: var(--muted);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

/* フラッシュメッセージ */
.flash-success {
    background-color: #f0fdf4;
    color: #16a34a;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.flash-error {
    background-color: #fef2f2;
    color: #dc2626;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}