:root {
    /* Dark Theme iOS */
    --primary: #0a84ff;
    --primary-dark: #0066cc;
    --danger: #ff453a;
    --success: #30d158;
    --warning: #ffd60a;
    --bg: #000000;
    --surface: rgba(28, 28, 30, 0.72);
    --surface-hover: rgba(44, 44, 46, 0.85);
    --text: #ffffff;
    --text-muted: #8e8e93;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 10px;
}

[data-theme="light"] {
    --primary: #007aff;
    --primary-dark: #0051d5;
    --danger: #ff3b30;
    --success: #34c759;
    --warning: #ff9500;
    --bg: #f2f2f7;
    --surface: rgba(255, 255, 255, 0.72);
    --surface-hover: rgba(255, 255, 255, 0.95);
    --text: #000000;
    --text-muted: #8e8e93;
    --border: rgba(0, 0, 0, 0.1);
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* File Manager Container */
.file-manager {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Header */
.fm-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.breadcrumb-item {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb-item:hover {
    color: var(--primary);
}

.breadcrumb-item.active {
    color: var(--text);
    font-weight: 600;
}

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

/* Actions Toolbar */
.fm-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.fm-btn {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
}

.fm-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.fm-btn:active {
    transform: scale(0.95);
}

.fm-btn.primary {
    background: var(--primary);
    color: white;
}

.fm-btn.danger {
    background: var(--danger);
    color: white;
}

/* Search Bar */
.fm-search {
    margin-bottom: 24px;
}

.fm-search input {
    width: 100%;
    padding: 14px 20px;
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.fm-search input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.1);
}

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

/* View Toggle */
.view-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    justify-content: space-between;
    align-items: center;
}

.view-toggle {
    display: flex;
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 4px;
}

.view-toggle button {
    padding: 8px 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.view-toggle button.active {
    background: var(--primary);
    color: white;
}

/* File Content Area */
.fm-content {
    min-height: 400px;
}

/* Grid View - Compact Design */
.fm-content.grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 12px;
}

.file-card {
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    position: relative;
}

.file-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
    border-color: var(--primary);
}

.file-card:active {
    transform: scale(0.97);
}

.file-icon {
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.file-name {
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.3;
}

.file-meta {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* List View */
.fm-content.list-view {
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.file-list-header,
.file-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 120px;
    padding: 16px 20px;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--border);
}

.file-list-header {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
}

.file-row {
    cursor: pointer;
    transition: background 0.2s;
}

.file-row:hover {
    background: var(--surface-hover);
}

.file-row:last-child {
    border-bottom: none;
}

.file-row-name {
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-row-icon {
    font-size: 1.5rem;
}

/* Upload Zone */
.upload-zone {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.upload-zone.active {
    display: flex;
}

.upload-zone-content {
    background: var(--surface);
    padding: 60px;
    border-radius: var(--radius-lg);
    border: 3px dashed var(--primary);
    text-align: center;
}

.upload-zone-content p {
    font-size: 1.2rem;
    margin-top: 20px;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    padding: 30px;
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    border: 1px solid var(--border);
}

.modal-header {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.modal-body {
    margin-bottom: 24px;
}

.modal-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.95rem;
}

.modal-input:focus {
    outline: none;
    border-color: var(--primary);
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--surface);
    backdrop-filter: blur(20px) saturate(180%);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 3000;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--danger);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .fm-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .fm-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .fm-content.grid-view {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
    }

    .file-list-header,
    .file-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .file-list-header {
        display: none;
    }
}