/* ============================================================
   光影画廊 - 全站样式
   设计风格：现代暗色主题、卡片式布局、全响应式
   ============================================================ */

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

:root {
    --bg-primary: #0f0f13;
    --bg-secondary: #1a1a24;
    --bg-card: #1e1e2a;
    --bg-card-hover: #262636;
    --bg-input: #252532;
    --text-primary: #e8e8f0;
    --text-secondary: #9999aa;
    --text-muted: #666680;
    --accent: #6c5ce7;
    --accent-hover: #7f70f0;
    --accent-light: rgba(108, 92, 231, 0.15);
    --border: #2a2a3a;
    --border-light: #333348;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1320px;
    --header-height: 64px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--accent-hover);
}

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

/* ---------- Header ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 19, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), #a29bfe);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}
.btn-outline:hover {
    background: var(--bg-card);
    border-color: var(--accent);
    color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 12px;
}
.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.btn-danger {
    background: #e74c3c;
    color: #fff;
}
.btn-danger:hover {
    background: #c0392b;
    color: #fff;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
}

/* ---------- Container ---------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 24px;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.page-desc {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

/* ---------- Album Grid ---------- */
.album-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.album-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.album-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.album-cover {
    position: relative;
    width: 100%;
    padding-top: 66.67%; /* 3:2 ratio */
    overflow: hidden;
    background: var(--bg-secondary);
}

.album-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.album-card:hover .album-cover img {
    transform: scale(1.05);
}

.album-cover-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-muted);
}

.album-cover-overlay {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(6px);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    color: #ccc;
    display: flex;
    align-items: center;
    gap: 4px;
}

.album-info {
    padding: 18px 20px;
}

.album-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.album-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.album-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---------- Image Grid (Album Detail) ---------- */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.image-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all var(--transition);
}

.image-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.image-card-img {
    position: relative;
    width: 100%;
    padding-top: 100%; /* square */
    overflow: hidden;
    background: var(--bg-secondary);
}

.image-card-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.image-card:hover .image-card-img img {
    transform: scale(1.08);
}

.image-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.image-card-zoom {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
}

.image-card-info {
    padding: 12px 14px;
}

.image-card-title {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.image-card-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ---------- Lightbox ---------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes zoomIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    animation: zoomIn 0.3s ease;
}

.lightbox-content img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.lightbox-close {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    z-index: 10001;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
    transform: rotate(90deg);
}

.lightbox-nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    z-index: 10001;
}

.lightbox-nav:hover {
    background: rgba(255,255,255,0.25);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-counter {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #ccc;
    z-index: 10001;
}

.lightbox-title {
    position: fixed;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.95rem;
    color: #ccc;
    z-index: 10001;
    max-width: 60vw;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ---------- Forms ---------- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    color: #e74c3c;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.form-success {
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid rgba(46, 204, 113, 0.3);
    color: #2ecc71;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.btn-block {
    width: 100%;
    justify-content: center;
    padding: 14px;
    font-size: 1rem;
}

/* ---------- Upload Page ---------- */
.upload-area {
    border: 2px dashed var(--border-light);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
    background: var(--bg-card);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent);
    background: var(--accent-light);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.upload-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.upload-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.preview-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.preview-item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.preview-remove {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(231, 76, 60, 0.85);
    border: none;
    color: #fff;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.preview-remove:hover {
    background: #e74c3c;
}

/* ---------- Album Management ---------- */
.album-manage-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.manage-actions {
    display: flex;
    gap: 8px;
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 10000;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.9rem;
    animation: slideIn 0.3s ease;
    box-shadow: var(--shadow);
    max-width: 360px;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast-success { background: #2ecc71; }
.toast-error { background: #e74c3c; }
.toast-info { background: var(--accent); }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-secondary);
}
.breadcrumb a:hover {
    color: var(--accent);
}

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

/* ---------- Empty State ---------- */
.empty-state {
    text-align: center;
    padding: 64px 24px;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-desc {
    font-size: 0.9rem;
    max-width: 400px;
    margin: 0 auto 24px;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }

    .container {
        padding: 20px 16px;
    }

    .album-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 16px;
    }

    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 10px;
    }

    .auth-card {
        padding: 28px 20px;
    }

    .page-title {
        font-size: 1.4rem;
    }

    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }

    .upload-area {
        padding: 32px 16px;
    }

    .upload-preview {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .album-grid {
        grid-template-columns: 1fr;
    }

    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .header-inner {
        padding: 0 12px;
    }

    .logo {
        font-size: 1.1rem;
    }

    .btn {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
}