/* ═══════════════════════════════════════════════════════════════════
   SnowDrive - Main Stylesheet
   ═══════════════════════════════════════════════════════════════════ */

/* ─── CSS Variables (Light Theme - Default) ─────────────────────── */
:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eef1f5;
    --bg-hover: #e8ecf1;
    --bg-sidebar: #1e293b;
    --bg-sidebar-hover: #334155;
    --bg-sidebar-active: #4a6cf7;

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-sidebar: #cbd5e1;
    --text-sidebar-muted: #94a3b8;
    --text-on-primary: #ffffff;

    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    --accent: #4a6cf7;
    --accent-hover: #3b5de7;
    --accent-light: #eef2ff;

    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --sidebar-width: 250px;
    --sidebar-collapsed-width: 64px;
    --topbar-height: 56px;
    --toolbar-height: 48px;
    --infobar-height: 32px;

    --transition: 0.2s ease;
}

/* ─── Dark Theme Overrides ──────────────────────────────────────── */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #3b4f6b;
    --bg-sidebar: #0c1222;
    --bg-sidebar-hover: #1a2744;
    --bg-sidebar-active: #4a6cf7;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-sidebar: #cbd5e1;
    --text-sidebar-muted: #64748b;
    --text-on-primary: #ffffff;

    --border-color: #334155;
    --border-light: #1e293b;

    --accent: #6b8aff;
    --accent-hover: #5a78f0;
    --accent-light: #1e2746;

    --success: #10b981;
    --success-light: #064e3b;
    --warning: #f59e0b;
    --warning-light: #451a03;
    --danger: #f87171;
    --danger-hover: #ef4444;
    --danger-light: #450a0a;
    --info: #60a5fa;
    --info-light: #172554;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

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

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: var(--text-primary);
}

/* ─── Scrollbar ─────────────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.9rem;
    line-height: 1.4;
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.btn i { font-size: 0.95em; }

.btn-primary {
    background: var(--accent);
    color: var(--text-on-primary);
}
.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
}

.btn-danger {
    background: var(--danger);
    color: white;
}
.btn-danger:hover:not(:disabled) {
    background: var(--danger-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}
.btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-full { width: 100%; justify-content: center; }

.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8rem; border-radius: var(--radius-sm); }
.btn-icon {
    padding: 0.5rem;
    width: 2.25rem;
    height: 2.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all var(--transition);
}
.btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.select-sm {
    padding: 0.375rem 0.5rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
}

/* ─── Forms ─────────────────────────────────────────────────────── */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.form-group label i {
    width: 1.2em;
    text-align: center;
    margin-right: 0.25rem;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="url"],
.form-group input[type="search"] {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition);
    outline: none;
}
.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.password-input-wrapper {
    position: relative;
}
.password-input-wrapper input {
    padding-right: 2.5rem !important;
}
.toggle-password {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.25rem;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
}
.toggle-password:hover { color: var(--text-primary); }

.inline-form {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.inline-form input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    outline: none;
}
.inline-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

/* ─── Auth Pages ────────────────────────────────────────────────── */
.auth-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
}

.auth-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border-color);
}
.setup-2fa-card { max-width: 480px; }

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}
.auth-logo {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: var(--accent);
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1rem;
}
.auth-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}
.auth-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
}

.error-message {
    background: var(--danger-light);
    color: var(--danger);
    padding: 0.625rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.step-indicator {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--accent);
}
.step-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

/* Password Strength */
.password-strength {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    margin-top: 0.375rem;
    overflow: hidden;
}
.strength-bar {
    height: 100%;
    width: 0%;
    transition: width 0.3s ease, background 0.3s ease;
    border-radius: 2px;
}
.strength-bar.weak { background: var(--danger); }
.strength-bar.medium { background: var(--warning); }
.strength-bar.strong { background: var(--success); }

/* Avatar Upload Preview */
.avatar-upload {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.avatar-preview {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 2px dashed var(--border-color);
}
.avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.avatar-preview i {
    font-size: 1.5rem;
    color: var(--text-muted);
}

/* QR Code */
.qr-container {
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}
.qr-container img {
    max-width: 200px;
    height: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}
.qr-placeholder {
    width: 200px;
    height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
    border: 2px dashed var(--border-color);
    color: var(--text-muted);
    gap: 0.75rem;
    font-size: 0.85rem;
}
.qr-placeholder i { opacity: 0.5; }

.secret-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    margin: 0.75rem 0;
    font-size: 0.85rem;
}
.secret-display label { color: var(--text-secondary); flex-shrink: 0; }
.secret-display code {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    word-break: break-all;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.skip-section { margin-top: 1.5rem; text-align: center; }
.divider {
    display: flex;
    align-items: center;
    margin: 1rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}
.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}
.divider span { padding: 0 0.75rem; }
.skip-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

/* Alert */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}
.alert-warning {
    background: var(--warning-light);
    color: var(--warning);
    border: 1px solid var(--warning);
}

/* Theme Toggle */
.theme-toggle-btn {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-primary);
    z-index: 50;
    transition: all var(--transition);
}
.theme-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}
.theme-toggle-btn-inline {
    width: 36px;
    height: 36px;
    font-size: 1rem;
}

/* ═══════════════════════════════════════════════════════════════════
   APP LAYOUT
   ═══════════════════════════════════════════════════════════════════ */

.app-layout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ─── Sidebar ──────────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    z-index: 100;
    overflow: hidden;
}
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    min-width: var(--sidebar-collapsed-width);
}
.sidebar.collapsed .app-logo span,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .user-name,
.sidebar.collapsed .sidebar-footer .btn span,
.sidebar.collapsed .storage-info span {
    display: none;
}
.sidebar.collapsed .nav-item { justify-content: center; padding: 0.75rem; }
.sidebar.collapsed .sidebar-footer { align-items: center; }
.sidebar.collapsed .sidebar-footer .btn { justify-content: center; }

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.app-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
}
.app-logo i { color: var(--accent); font-size: 1.25rem; }
.sidebar-toggle {
    color: var(--text-sidebar-muted);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
}
.sidebar-toggle:hover { color: white; background: var(--bg-sidebar-hover); }

.sidebar-nav {
    flex: 1;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius);
    color: var(--text-sidebar);
    font-size: 0.9rem;
    transition: all var(--transition);
}
.nav-item:hover { background: var(--bg-sidebar-hover); color: white; }
.nav-item.active {
    background: var(--bg-sidebar-active);
    color: white;
}
.nav-item i { width: 1.25rem; text-align: center; font-size: 1rem; }

.sidebar-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.storage-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-sidebar-muted);
    font-size: 0.8rem;
    padding: 0.375rem 0;
}
.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0;
}
.user-avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-sidebar-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.user-avatar-sm img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.user-avatar-sm i { color: var(--text-sidebar-muted); font-size: 0.9rem; }
.user-name {
    color: var(--text-sidebar);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ─── Main Content ──────────────────────────────────────────────── */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ─── Top Bar ──────────────────────────────────────────────────── */
.top-bar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
    flex-shrink: 0;
}
.top-bar-left, .top-bar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.mobile-sidebar-toggle { display: none; }

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: wrap;
}
.breadcrumb-item {
    color: var(--text-muted);
    font-size: 0.875rem;
    padding: 0.25rem 0.375rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.breadcrumb-item:hover { color: var(--accent); background: var(--accent-light); }
.breadcrumb-item.active { color: var(--text-primary); font-weight: 600; }
.breadcrumb-sep {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin: 0 0.125rem;
}

.page-title {
    font-size: 1.15rem;
    font-weight: 600;
}

.search-box {
    position: relative;
}
.search-box input {
    padding: 0.5rem 0.75rem 0.5rem 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    width: 200px;
    font-size: 0.85rem;
    transition: all var(--transition);
}
.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
    width: 260px;
}
.search-box i {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.8rem;
    pointer-events: none;
}

/* ─── Toolbar ──────────────────────────────────────────────────── */
.toolbar {
    height: var(--toolbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    gap: 0.75rem;
    flex-shrink: 0;
    flex-wrap: wrap;
}
.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.toolbar-divider {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 0.25rem;
}

.view-toggle {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.view-btn {
    border-radius: 0 !important;
    border-right: 1px solid var(--border-color);
}
.view-btn:last-child { border-right: none; }
.view-btn.active { background: var(--accent); color: var(--text-on-primary); }

.sort-controls { display: flex; align-items: center; gap: 0.25rem; }

/* ─── File Area ────────────────────────────────────────────────── */
.file-area {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
    position: relative;
}

.file-list { min-height: 100px; }

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--text-muted);
    gap: 0.75rem;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    gap: 0.75rem;
    text-align: center;
}
.empty-state h3 { color: var(--text-secondary); font-weight: 600; }
.empty-state p { font-size: 0.9rem; }
.empty-state i { opacity: 0.4; }

/* ─── List View ────────────────────────────────────────────────── */
.list-view { display: flex; flex-direction: column; }

.file-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
    border: 1px solid transparent;
    user-select: none;
    min-height: 44px;
}
.file-item:hover { background: var(--bg-hover); }
.file-item.selected {
    background: var(--accent-light);
    border-color: var(--accent);
}
.file-item .select-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--text-muted);
    border-radius: 4px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    color: transparent;
    transition: all var(--transition);
}
.file-item.selected .select-checkbox {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.file-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
}
.file-icon.fa-folder { color: #f59e0b; }
.file-icon.fa-file-image { color: #10b981; }
.file-icon.fa-file-pdf { color: #ef4444; }
.file-icon.fa-file-word { color: #3b82f6; }
.file-icon.fa-file-excel { color: #10b981; }
.file-icon.fa-file-powerpoint { color: #f97316; }
.file-icon.fa-file-audio { color: #8b5cf6; }
.file-icon.fa-file-video { color: #ec4899; }
.file-icon.fa-file-code { color: #6366f1; }
.file-icon.fa-file-zipper { color: #78716c; }
.file-icon.fa-file-lines { color: #64748b; }
.file-icon.fa-file-csv { color: #10b981; }
.file-icon.fa-file { color: #94a3b8; }

[data-theme="dark"] .file-icon.fa-folder { color: #fbbf24; }
[data-theme="dark"] .file-icon.fa-file { color: #64748b; }

.file-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.file-name {
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.file-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    gap: 0.75rem;
    align-items: center;
}
.file-meta-mobile { display: none; }

.file-actions {
    display: flex;
    gap: 0.125rem;
    opacity: 0;
    transition: opacity var(--transition);
}
.file-item:hover .file-actions { opacity: 1; }
.file-actions .btn-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

/* ─── Grid View ────────────────────────────────────────────────── */
.grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
}

.grid-view .file-item {
    flex-direction: column;
    text-align: center;
    padding: 1rem 0.5rem;
    gap: 0.5rem;
    min-height: auto;
    position: relative;
}
.grid-view .file-item .select-checkbox {
    position: absolute;
    top: 0.375rem;
    left: 0.375rem;
    display: none; /* hide checkbox in grid view; selection via click */
}
.grid-view .file-icon {
    width: 48px;
    height: 48px;
    font-size: 2rem;
}
.grid-view .file-name {
    font-size: 0.8rem;
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    white-space: normal;
    word-break: break-all;
    line-height: 1.3;
}
.grid-view .file-meta { font-size: 0.7rem; }
.grid-view .file-actions {
    display: none; /* hide top-right action icons in grid view; use inline rename button */
}

/* Small rename button shown under grid item when selected */
.grid-rename-btn {
    display: none;
    margin-top: 0.25rem;
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
}
.grid-view .file-item.selected .grid-rename-btn { display: inline-flex; }

/* ─── Info Bar ─────────────────────────────────────────────────── */
.info-bar {
    height: var(--infobar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════
   MODALS
   ═══════════════════════════════════════════════════════════════════ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(2px);
}
.modal.active { display: flex; }

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    border: 1px solid var(--border-color);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.2s ease;
}
.modal-sm { max-width: 400px; }
.modal-md { max-width: 520px; }
.modal-lg { max-width: 800px; }

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-20px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all var(--transition);
}
.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.25rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* ═══════════════════════════════════════════════════════════════════
   TOAST
   ═══════════════════════════════════════════════════════════════════ */

.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 280px;
    max-width: 420px;
    pointer-events: auto;
    animation: toastIn 0.3s ease;
    border: 1px solid transparent;
}
@keyframes toastIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}
.toast-success {
    background: var(--success-light);
    color: #065f46;
    border-color: var(--success);
}
.toast-error {
    background: var(--danger-light);
    color: #991b1b;
    border-color: var(--danger);
}
.toast-info {
    background: var(--info-light);
    color: #1e40af;
    border-color: var(--info);
}
[data-theme="dark"] .toast-success { color: #6ee7b7; }
[data-theme="dark"] .toast-error { color: #fca5a5; }
[data-theme="dark"] .toast-info { color: #93c5fd; }

/* ═══════════════════════════════════════════════════════════════════
   DROP OVERLAY
   ═══════════════════════════════════════════════════════════════════ */

.drop-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(74, 108, 247, 0.15);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 900;
    border: 3px dashed var(--accent);
}
.drop-overlay.active { display: flex; }

.drop-message {
    text-align: center;
    color: var(--accent);
}
.drop-message i { font-size: 3rem; margin-bottom: 0.5rem; }
.drop-message h2 { font-size: 1.5rem; font-weight: 700; }

/* ═══════════════════════════════════════════════════════════════════
   PROGRESS
   ═══════════════════════════════════════════════════════════════════ */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}
.progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
}

/* ═══════════════════════════════════════════════════════════════════
   BADGES
   ═══════════════════════════════════════════════════════════════════ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-disabled { background: var(--bg-tertiary); color: var(--text-muted); }
.badge-enabled { background: var(--success-light); color: #065f46; }
[data-theme="dark"] .badge-enabled { color: #6ee7b7; }

/* ═══════════════════════════════════════════════════════════════════
   SETTINGS PAGE
   ═══════════════════════════════════════════════════════════════════ */
.settings-container {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.settings-sections {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.settings-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 600;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.settings-card {
    padding: 1.25rem;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--border-light);
    gap: 1rem;
}
.setting-row:last-child { border-bottom: none; }
.setting-label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.setting-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    text-align: right;
}
.setting-control {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar-setting { align-items: flex-start; }
.avatar-preview-lg {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
    flex-shrink: 0;
}
.avatar-preview-lg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.avatar-preview-lg i { color: var(--text-muted); }
.avatar-actions {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.setting-actions {
    display: flex;
    gap: 0.5rem;
}

.loading-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-muted);
    gap: 0.5rem;
}
.dirstat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}
.dirstat-item {
    background: var(--bg-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    text-align: center;
}
.dirstat-item .dirstat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}
.dirstat-item .dirstat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        bottom: 0;
        transition: left var(--transition);
    }
    .sidebar.mobile-open { left: 0; }
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 99;
        display: none;
    }
    .sidebar-overlay.active { display: block; }

    .mobile-sidebar-toggle { display: flex; }

    .toolbar {
        height: auto;
        padding: 0.5rem 0.75rem;
        gap: 0.375rem;
    }
    .toolbar-left { flex-wrap: wrap; }
    .toolbar-right { margin-top: 0.25rem; }

    .search-box input { width: 140px; }
    .search-box input:focus { width: 180px; }

    .auth-card { padding: 1.5rem; }

    .file-item .file-meta { display: none; }
    .file-item .file-meta-mobile { display: flex; font-size: 0.7rem; color: var(--text-muted); }

    .grid-view { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }

    .file-actions { opacity: 1; }

    .settings-container { padding: 0.75rem; }
    .settings-sections { gap: 0.75rem; }
    .dirstat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .toolbar-left { gap: 0.25rem; }
    .toolbar-left .btn { padding: 0.375rem 0.5rem; font-size: 0.75rem; }
    .toolbar-left .btn i { font-size: 0.8rem; }
    .toolbar-left .btn span { display: none; }
    .toolbar-divider { margin: 0; }

    .grid-view { grid-template-columns: repeat(2, 1fr); gap: 0.375rem; }
}

/* ═══════════════════════════════════════════════════════════════════
   SELECT ALL BAR
   ═══════════════════════════════════════════════════════════════════ */
.select-all-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: 0.375rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}
.select-all-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}
.select-all-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* ═══════════════════════════════════════════════════════════════════
   UPLOAD MINI WINDOW (movable, collapsible)
   ═══════════════════════════════════════════════════════════════════ */
.upload-mini-window {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    width: 320px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 500;
    display: none;
    overflow: hidden;
    resize: both;
    min-width: 260px;
    min-height: 120px;
    max-height: 400px;
}
.upload-mini-window.open { display: flex; flex-direction: column; }
.upload-mini-window.minimized .umw-body { display: none; }
.upload-mini-window.minimized { height: auto !important; min-height: auto !important; }

.umw-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    background: var(--accent);
    color: white;
    cursor: move;
    user-select: none;
    font-size: 0.85rem;
    font-weight: 600;
    gap: 0.5rem;
}
.umw-header .btn-icon { color: white; }
.umw-header .btn-icon:hover { background: rgba(255,255,255,0.2); }
.umw-actions { display: flex; gap: 0.125rem; }

.umw-body {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}
.umw-list { display: flex; flex-direction: column; gap: 0.375rem; }
.umw-empty { text-align: center; color: var(--text-muted); font-size: 0.8rem; padding: 1rem; }
.umw-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    font-size: 0.8rem;
}
.umw-item .progress-bar-container { flex: 1; height: 6px; margin: 0; }
.umw-item-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.8rem; }

/* ═══════════════════════════════════════════════════════════════════
   DOWNLOAD MANAGER MINI WINDOW
   ═══════════════════════════════════════════════════════════════════ */
.download-mini-window {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    width: 360px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 500;
    overflow: hidden;
    resize: both;
    min-width: 280px;
    min-height: 150px;
    max-height: 480px;
    display: none;
}
.download-mini-window.open { display: flex; flex-direction: column; }
.download-mini-window.minimized .dmw-body { display: none; }
.download-mini-window.minimized { height: auto !important; min-height: auto !important; }

.dmw-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    cursor: move;
    user-select: none;
    font-size: 0.85rem;
    font-weight: 600;
}
.dmw-header .btn-icon { color: var(--bg-primary); }
.dmw-header .btn-icon:hover { background: rgba(255,255,255,0.15); }
.dmw-actions { display: flex; gap: 0.125rem; }

.dmw-body { flex: 1; overflow-y: auto; padding: 0.5rem; }
.dmw-list { display: flex; flex-direction: column; gap: 0.375rem; }
.dmw-empty { text-align: center; color: var(--text-muted); font-size: 0.8rem; padding: 1rem; }
.dmw-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    font-size: 0.8rem;
}
.dmw-item-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.8rem; }
.dmw-item-status { font-size: 0.7rem; color: var(--text-muted); }
.dmw-item .progress-bar-container { flex: 1; height: 6px; margin: 0; }

/* Progress Manager Tabs */
.dmw-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}
.dmw-tab {
    padding: 0.4rem 0.65rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-muted);
    font-weight: 600;
    border-radius: 6px 6px 0 0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: all var(--transition);
}
.dmw-tab i { font-size: 0.9rem; }
.dmw-tab:hover { color: var(--text-primary); }
.dmw-tab.active {
    color: var(--text-primary);
    background: linear-gradient(180deg, rgba(0,0,0,0.03), transparent);
    border-color: var(--border-color);
    box-shadow: inset 0 -2px 0 var(--accent);
}
.dmw-count {
    background: var(--accent);
    color: #fff;
    padding: 0 6px;
    border-radius: 999px;
    font-size: 0.75rem;
    line-height: 1;
    margin-left: 6px;
    display: inline-block;
}

.badge-dot {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--danger);
    display: inline-block;
}

/* ═══════════════════════════════════════════════════════════════════
   METHOD TABS (Login 2FA Selector)
   ═══════════════════════════════════════════════════════════════════ */
.method-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}
.method-tab {
    padding: 0.5rem 0.75rem;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    background: none;
    border-radius: 0;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    transition: all var(--transition);
}
.method-tab:hover { color: var(--text-primary); }
.method-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.method-panel { padding: 0.5rem 0; }

/* ═══════════════════════════════════════════════════════════════════
   METHOD OPTIONS (Setup 2FA page)
   ═══════════════════════════════════════════════════════════════════ */
.method-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1rem 0;
}
.method-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    text-align: left;
    transition: all var(--transition);
    cursor: pointer;
}
.method-option:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}
.method-option i { color: var(--accent); flex-shrink: 0; }
.method-option strong { display: block; font-size: 0.95rem; margin-bottom: 0.125rem; }
.method-option small { color: var(--text-muted); font-size: 0.8rem; }

/* ═══════════════════════════════════════════════════════════════════
   RECOVERY CODES
   ═══════════════════════════════════════════════════════════════════ */
.recovery-codes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin: 0.75rem 0;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}
.recovery-code-item {
    background: var(--bg-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    text-align: center;
    letter-spacing: 1px;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

/* ═══════════════════════════════════════════════════════════════════
   2FA Method List (Settings)
   ═══════════════════════════════════════════════════════════════════ */
.twofa-method-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--border-light);
    gap: 0.75rem;
}
.twofa-method-item:last-child { border-bottom: none; }
.twofa-method-info { display: flex; align-items: center; gap: 0.625rem; }
.twofa-method-info i { font-size: 1.2rem; color: var(--accent); width: 24px; text-align: center; }
.twofa-method-name { font-weight: 500; font-size: 0.875rem; }
.twofa-method-type { font-size: 0.75rem; color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════════════════
   THEME TOGGLE FIX - Inline button
   ═══════════════════════════════════════════════════════════════════ */
#theme-toggle-inline {
    position: relative;
    z-index: 1;
}

/* Responsive for download/upload mini windows */
@media (max-width: 768px) {
    .upload-mini-window { width: 280px; right: 0.5rem; bottom: 0.5rem; }
    .download-mini-window { width: 300px; right: 0.5rem; bottom: 0.5rem; }
    .recovery-codes-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
    .upload-mini-window { width: calc(100vw - 1rem); right: 0.5rem; left: 0.5rem; }
    .download-mini-window { width: calc(100vw - 1rem); right: 0.5rem; left: 0.5rem; }
}