/* ===== CSS Variables ===== */
:root {
    --primary: #8b5a2b;
    --primary-dark: #6d4422;
    --primary-light: #a67c52;
    --primary-muted: rgba(139,90,43,0.08);
    --text: #3d2b1f;
    --text-secondary: #7a5e4d;
    --text-light: #b99471;
    --bg-body: #fcf6ee;
    --bg-card: #fffdf7;
    --bg-glass: rgba(255,251,240,0.55);
    --bg-glass-strong: rgba(255,251,240,0.75);
    --border-glass: rgba(248,234,218,0.7);
    --border-glass-strong: rgba(230,213,195,0.9);
    --shadow: 0 8px 32px rgba(139,90,43,0.08);
    --shadow-hover: 0 12px 48px rgba(139,90,43,0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans SC',sans-serif;
    background: linear-gradient(135deg,#fcf6ee 0%,#f5e6d8 50%,#fcf6ee 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text);
    line-height: 1.6;
}

/* ===== Glass utility ===== */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ===== Layout ===== */
.container { max-width: 1400px; margin: 0 auto; padding: 24px; }

/* ===== Header ===== */
.header {
    position: relative;
    text-align: center;
    padding: 36px 24px 32px;
    margin-bottom: 24px;
    overflow: hidden;
}
.title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--primary-dark);
    letter-spacing: 2px;
    position: relative;
    z-index: 1;
}
.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-style: italic;
    position: relative;
    z-index: 1;
}
.moon-lights {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    font-size: 1.2rem;
    opacity: 0.12;
    pointer-events: none;
    user-select: none;
}

/* ===== Toolbar ===== */
.toolbar {
    display: flex;
    gap: 10px;
    padding: 16px 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.tool-btn {
    padding: 10px 20px;
    border: 1.5px solid var(--border-glass-strong);
    border-radius: var(--radius-sm);
    background: var(--bg-glass-strong);
    color: var(--primary-dark);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
}
.tool-btn:hover {
    background: var(--primary-muted);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.tool-btn:active { transform: translateY(0); }

/* ===== Breadcrumb ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}
.breadcrumb span {
    cursor: pointer;
    color: var(--primary);
    font-weight: 500;
    transition: color var(--transition);
    padding: 2px 6px;
    border-radius: 6px;
}
.breadcrumb span:hover {
    color: var(--primary-dark);
    background: var(--primary-muted);
}
.breadcrumb .separator {
    cursor: default;
    color: var(--text-light);
    padding: 0;
}
.breadcrumb .separator:hover {
    color: var(--text-light);
    background: none;
}

/* ===== Folder Grid ===== */
.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill,minmax(200px,1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.folder-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border-glass-strong);
    border-radius: var(--radius);
    padding: 28px 16px 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow);
}
.folder-card:hover {
    border-color: var(--primary-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.folder-icon { font-size: 2.8rem; margin-bottom: 8px; }
.folder-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
    word-break: break-all;
}
.folder-count { font-size: 0.75rem; color: var(--text-light); }
.folder-actions {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 10px;
}
.folder-action-btn {
    padding: 4px 10px;
    border: 1px solid var(--border-glass-strong);
    border-radius: 8px;
    background: var(--bg-glass);
    font-size: 0.78rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}
.folder-action-btn:hover {
    background: var(--primary-muted);
    border-color: var(--primary-light);
    color: var(--primary-dark);
}

/* ===== Media Grid ===== */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill,minmax(220px,1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.media-card-wrapper {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    border: 1.5px solid var(--border-glass);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}
.media-card-wrapper:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.media-card { cursor: pointer; display: block; width: 100%; }
.media-preview {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    transition: transform var(--transition);
}
.media-card-wrapper:hover .media-preview { transform: scale(1.05); }
.video-preview {
    width: 100%;
    height: 180px;
    background: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-light);
}
.media-info {
    padding: 10px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.media-name {
    font-size: 0.82rem;
    color: var(--text);
    word-break: break-all;
    flex: 1;
    margin-right: 8px;
}
.media-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}
.media-action-btn {
    padding: 3px 7px;
    border: 1px solid var(--border-glass-strong);
    border-radius: 6px;
    background: var(--bg-glass);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--text-secondary);
}
.media-action-btn:hover {
    background: var(--primary-muted);
    border-color: var(--primary-light);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
    font-size: 1.1rem;
}
.empty-state .empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state p { line-height: 1.8; }

/* ===== Modal ===== */
.modal-overlay[hidden] { display: none !important; }
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal {
    width: 380px;
    max-width: 90vw;
    padding: 28px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
}
.modal-title {
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 16px;
}
.modal-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-glass-strong);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: var(--bg-card);
    color: var(--text);
    outline: none;
    transition: border-color var(--transition);
}
.modal-input:focus { border-color: var(--primary-light); }
.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 18px;
}
.modal-btn {
    padding: 8px 22px;
    border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-glass-strong);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.confirm-btn {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.confirm-btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}
.cancel-btn {
    background: var(--bg-glass-strong);
    color: var(--text-secondary);
}
.cancel-btn:hover {
    background: var(--primary-muted);
    border-color: var(--primary-light);
}
.move-folder-option {
    padding: 8px 14px;
    border: 1.5px solid var(--border-glass-strong);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition);
}
.move-folder-option:hover {
    border-color: var(--primary-light);
    background: var(--primary-muted);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-glass-strong);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .container { padding: 16px; }
    .title { font-size: 1.6rem; }
    .subtitle { font-size: 0.85rem; }
    .toolbar { padding: 12px 14px; gap: 8px; }
    .tool-btn { padding: 8px 14px; font-size: 0.85rem; }
    .folder-grid { grid-template-columns: repeat(auto-fill,minmax(150px,1fr)); gap: 12px; }
    .media-grid { grid-template-columns: repeat(auto-fill,minmax(160px,1fr)); gap: 12px; }
    .folder-card { padding: 20px 12px 16px; }
    .folder-icon { font-size: 2.2rem; }
    .modal { padding: 20px 16px; }
}
@media (max-width: 480px) {
    .title { font-size: 1.3rem; }
    .folder-grid { grid-template-columns: repeat(2,1fr); }
    .media-grid { grid-template-columns: 1fr; }
}

/* ===== Progress Bar ===== */
.progress-track {
    width: 100%;
    height: 14px;
    background: #e8ddd0;
    border-radius: 7px;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg,var(--primary),var(--primary-light));
    border-radius: 7px;
    transition: width 0.25s ease;
}
.progress-text {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== Custom Dialog ===== */
.dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.dialog-box {
    width: 340px;
    max-width: 90vw;
    padding: 28px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-hover);
}
.dialog-title {
    font-size: 1.15rem;
    color: var(--primary-dark);
    margin-bottom: 14px;
}
.dialog-message {
    margin-bottom: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}
.dialog-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-glass-strong);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: var(--bg-card);
    color: var(--text);
    outline: none;
    transition: border-color 0.3s;
    margin-bottom: 18px;
}
.dialog-input:focus {
    border-color: var(--primary-light);
}