:root {
    --accent: #005fb8;
    --accent-light: #0078d4;
    --accent-hover: #004e8c;
    --accent-text: #ffffff;
    --danger: #c42b1c;
    --danger-hover: #9e1a10;
    --danger-bg: #fdf2f2;
    --success: #0f7b0f;
    --warning: #9d5d00;

    /* Mica layer tokens */
    --mica-base: rgba(243, 243, 243, 0.85);
    --mica-card: rgba(255, 255, 255, 0.7);
    --mica-sidebar: rgba(249, 249, 249, 0.8);
    --mica-smoke: rgba(0, 0, 0, 0.03);
    --mica-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");

    /* Fluent Design tokens */
    --text-primary: #1a1a1a;
    --text-secondary: #616161;
    --text-tertiary: #9e9e9e;
    --stroke-card: rgba(0, 0, 0, 0.06);
    --stroke-divider: rgba(0, 0, 0, 0.08);
    --stroke-control: rgba(0, 0, 0, 0.06);
    --fill-subtle: rgba(0, 0, 0, 0.04);
    --fill-muted: rgba(0, 0, 0, 0.06);
    --fill-solid: rgba(0, 0, 0, 0.04);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-card: 0 2px 4px rgba(0, 0, 0, 0.04), 0 8px 16px rgba(0, 0, 0, 0.06);
    --shadow-flyout: 0 8px 32px rgba(0, 0, 0, 0.14), 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-dialog: 0 32px 64px rgba(0, 0, 0, 0.18), 0 8px 16px rgba(0, 0, 0, 0.08);

    /* Segoe UI Variable — shipped with Windows 11 */
    --font-family: 'Segoe UI Variable Display', 'Segoe UI', 'Segoe UI Variable Text', system-ui, -apple-system, sans-serif;
    --font-weight-regular: 400;
    --font-weight-semibold: 600;
}

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

/* ─── Base ─── */
body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-regular);
    background: var(--mica-base);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ─── App Shell ─── */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ─── Sidebar (NavigationView) ─── */
.sidebar {
    width: 260px;
    background: var(--mica-sidebar);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    border-right: 1px solid var(--stroke-card);
}

.sidebar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--mica-noise);
    pointer-events: none;
}

.sidebar-header {
    padding: 24px 20px 16px;
    position: relative;
}

.logo-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-link:hover { text-decoration: none; }

.logo-icon {
    flex-shrink: 0;
}

.logo {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: -0.03em;
    background: linear-gradient(180deg, #1a1a1a 0%, #4a4a4a 40%, #1a1a1a 60%, #555 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 1px 0 rgba(255,255,255,0.6));
    -webkit-text-stroke: 0.3px rgba(0,0,0,0.15);
}

.sidebar-nav {
    flex: 1;
    padding: 4px 8px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background 150ms ease, color 150ms ease;
    font-size: 14px;
    position: relative;
}

.nav-item:hover {
    background: var(--fill-subtle);
    text-decoration: none;
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--fill-muted);
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 16px;
    background: var(--accent);
    border-radius: 2px;
}

.nav-divider {
    height: 1px;
    background: var(--stroke-divider);
    margin: 8px 12px;
}

.sidebar-footer {
    padding: 8px;
    border-top: 1px solid var(--stroke-card);
    position: relative;
}

/* ─── Storage ─── */
.storage-info { padding: 8px 12px 12px; }

.storage-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.storage-label {
    font-size: 12px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
}

.storage-text {
    font-size: 11px;
    color: var(--text-tertiary);
}

.storage-bar {
    height: 4px;
    background: var(--fill-subtle);
    border-radius: 2px;
    overflow: hidden;
}

.storage-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* ─── User Panel ─── */
.user-panel {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    transition: background 120ms ease;
}

.user-panel:hover {
    background: var(--fill-subtle);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.avatar-letter {
    font-size: 13px;
    font-weight: var(--font-weight-semibold);
    color: #fff;
    line-height: 1;
    user-select: none;
}

.user-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.user-name {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-role {
    font-size: 11px;
    color: var(--text-tertiary);
    line-height: 1.3;
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    opacity: 0;
    transition: opacity 120ms ease;
}

.user-panel:hover .user-actions {
    opacity: 1;
}

.user-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background 120ms ease, color 120ms ease;
}

.user-action-btn:hover {
    background: var(--fill-muted);
    color: var(--text-primary);
    text-decoration: none;
}

.logout-form { display: inline; }

/* ─── Main Content ─── */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 28px 32px;
    min-height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
}

.main-content::before {
    content: '';
    position: fixed;
    inset: 0;
    margin-left: 260px;
    background: var(--mica-noise);
    pointer-events: none;
    z-index: 0;
}

.main-content > * { position: relative; z-index: 1; }

/* ─── Page Header ─── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

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

/* ─── Breadcrumb ─── */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
}

.breadcrumb-item {
    color: var(--text-secondary);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    transition: background 150ms ease;
}
.breadcrumb-item:hover {
    color: var(--accent);
    background: var(--fill-subtle);
    text-decoration: none;
}
.breadcrumb-sep { color: var(--text-tertiary); font-size: 12px; }

/* ─── Buttons (Fluent style) ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--stroke-control);
    background: var(--mica-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-family);
    cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
    font-weight: var(--font-weight-regular);
    line-height: 1.4;
}

.btn:hover {
    background: var(--fill-subtle);
    border-color: var(--stroke-card);
    text-decoration: none;
}

.btn:active {
    background: var(--fill-muted);
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
    border-color: transparent;
}
.btn-primary:hover {
    background: var(--accent-hover);
    border-color: transparent;
}

.btn-secondary { background: var(--mica-card); }

.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: transparent;
}
.btn-danger:hover { background: var(--danger-hover); }

.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 3px 8px; font-size: 12px; }

/* ─── Icon Buttons ─── */
.btn-icon {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 120ms ease, color 120ms ease;
}

.btn-icon:hover {
    background: var(--fill-subtle);
    color: var(--text-primary);
}
.btn-icon-danger:hover { background: var(--danger-bg); color: var(--danger); }
a.btn-icon { text-decoration: none; display: inline-flex; align-items: center; }

/* ─── File Browser (Card) ─── */
.file-browser {
    background: var(--mica-card);
    backdrop-filter: blur(20px) saturate(120%);
    -webkit-backdrop-filter: blur(20px) saturate(120%);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.file-table { width: 100%; border-collapse: collapse; }

.file-table th {
    text-align: left;
    padding: 10px 16px;
    font-size: 12px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    border-bottom: 1px solid var(--stroke-divider);
    user-select: none;
}

.file-table td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--stroke-divider);
    font-size: 14px;
}

.file-table tr:last-child td { border-bottom: none; }

.file-table tr:hover td { background: var(--fill-subtle); }

.file-name-col { width: 50%; }
.file-size-col { width: 15%; }
.file-modified-col { width: 20%; }
.file-actions-col { width: 15%; text-align: right; }

.file-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
}

.file-link:hover {
    color: var(--accent);
    text-decoration: none;
}

.file-icon { flex-shrink: 0; }

.file-actions {
    text-align: right;
    white-space: nowrap;
}

/* ─── Upload Zone ─── */
.upload-zone {
    border: 2px dashed var(--stroke-control);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    margin-bottom: 24px;
    cursor: pointer;
    transition: border-color 150ms ease, background 150ms ease;
    background: transparent;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(0, 95, 184, 0.04);
}

.upload-zone-content p {
    margin-top: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.upload-progress { margin-top: 16px; }

.upload-item {
    margin-bottom: 12px;
}

.upload-item-name {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.progress-bar {
    height: 4px;
    background: var(--fill-subtle);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state h3 {
    margin-top: 16px;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
}
.empty-state p { margin-top: 8px; font-size: 14px; }

/* ─── Modal (ContentDialog) ─── */
.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 200;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal {
    position: absolute;
    inset: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 201;
}

#dialog-modal {
    z-index: 301;
}

.main-content.modal-open {
    overflow: hidden;
}

.main-content.modal-open > *:not(.modal):not(.modal-overlay):not(.preview-modal) {
    filter: blur(4px);
    pointer-events: none;
    transition: filter 200ms ease;
}

.modal-dialog {
    background: var(--mica-card);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-dialog);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 12px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.01em;
}

.modal-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 120ms ease;
    line-height: 1;
}
.modal-close:hover { background: var(--fill-subtle); color: var(--text-primary); }

.modal-body { padding: 12px 24px 20px; }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 24px 20px;
}

.dialog-message {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    margin: 0;
}

.dialog-prompt-input {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--stroke-control);
    border-bottom: 2px solid var(--stroke-control);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-family);
    background: var(--fill-subtle);
    color: var(--text-primary);
    outline: none;
    transition: border-color 150ms ease, background 150ms ease;
}

.dialog-prompt-input:hover {
    background: var(--fill-muted);
}

.dialog-prompt-input:focus {
    border-bottom-color: var(--accent);
    background: var(--mica-card);
}

/* ─── Forms (FluentInput) ─── */
.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: var(--font-weight-regular);
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--stroke-control);
    border-bottom: 2px solid var(--stroke-control);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-family);
    background: var(--fill-subtle);
    color: var(--text-primary);
    transition: border-color 150ms ease, background 150ms ease;
    outline: none;
}

.form-group input:hover,
.form-group select:hover {
    background: var(--fill-muted);
}

.form-group input:focus,
.form-group select:focus {
    border-bottom-color: var(--accent);
    background: var(--mica-card);
}

/* ─── Alerts ─── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(196, 43, 28, 0.2);
}

.alert-success {
    background: #f0fdf4;
    color: var(--success);
    border: 1px solid rgba(15, 123, 15, 0.2);
}

/* ─── Auth Page ─── */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--mica-base);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.auth-card {
    background: var(--mica-card);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: 36px 32px;
}

.auth-header { text-align: center; margin-bottom: 28px; }

.auth-logo {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: -0.03em;
    background: linear-gradient(180deg, var(--accent) 0%, #0078d4 40%, var(--accent) 60%, #0099ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 1px 0 rgba(0,95,184,0.2));
}

.auth-subtitle {
    color: var(--text-secondary);
    margin-top: 4px;
    font-size: 14px;
}

.auth-form .btn { margin-top: 8px; }

/* ─── Auth Language Switcher ─── */
.auth-lang-switcher {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--stroke-divider);
}

.auth-lang-switcher .lang-form {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.auth-lang-switcher .lang-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
}

.auth-lang-switcher .lang-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 2px 0;
    transition: color 120ms ease;
}

.auth-lang-switcher .lang-dropdown-trigger:hover {
    color: var(--text-primary);
}

.auth-lang-switcher .lang-dropdown-trigger svg {
    transition: transform 150ms ease;
    flex-shrink: 0;
}

.auth-lang-switcher .lang-dropdown.open .lang-dropdown-trigger svg {
    transform: rotate(180deg);
}

.auth-lang-switcher .lang-dropdown-panel {
    bottom: auto;
    top: calc(100% + 4px);
}

/* ─── Error Page ─── */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.error-container { text-align: center; }

.error-code {
    font-size: 72px;
    font-weight: var(--font-weight-semibold);
    color: var(--accent);
    letter-spacing: -0.04em;
}

.error-title {
    font-size: 22px;
    margin-top: 8px;
    font-weight: var(--font-weight-semibold);
}

.error-message {
    color: var(--text-secondary);
    margin: 12px 0 24px;
}

/* ─── Settings ─── */
.settings-page { max-width: 720px; }

.settings-profile-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--mica-card);
    backdrop-filter: blur(20px) saturate(120%);
    -webkit-backdrop-filter: blur(20px) saturate(120%);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: 28px 32px;
    margin-bottom: 24px;
}

.settings-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.settings-avatar .avatar-letter {
    font-size: 22px;
    font-weight: var(--font-weight-semibold);
    color: #fff;
    line-height: 1;
}

.settings-profile-info { flex: 1; min-width: 0; }

.settings-username {
    font-size: 20px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 2px;
    letter-spacing: -0.01em;
}

.settings-email {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.settings-role-badge {
    display: inline-block;
    padding: 2px 10px;
    font-size: 11px;
    font-weight: var(--font-weight-semibold);
    color: var(--accent);
    background: rgba(0, 95, 184, 0.08);
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.settings-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-section {
    background: var(--mica-card);
    backdrop-filter: blur(20px) saturate(120%);
    -webkit-backdrop-filter: blur(20px) saturate(120%);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    padding: 24px 28px;
}

.settings-section-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--stroke-divider);
}

.settings-section-header svg { color: var(--text-secondary); }

.settings-section-header h3 {
    font-size: 15px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0;
}

.settings-form { width: 100%; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-hint {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.settings-actions {
    display: flex;
    justify-content: flex-end;
    padding-top: 8px;
    margin-top: 8px;
}

/* ─── Storage Detail ─── */
.storage-detail-grid {
    display: flex;
    align-items: center;
    gap: 40px;
}

.storage-visual { flex-shrink: 0; }

.storage-ring {
    position: relative;
    width: 100px;
    height: 100px;
}

.storage-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.storage-ring-bg {
    stroke: var(--fill-subtle);
}

.storage-ring-fill {
    stroke: var(--accent);
    stroke-linecap: round;
    transition: stroke-dasharray 0.6s ease;
}

.storage-ring-label {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.storage-ring-pct {
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.storage-unlimited {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.storage-unlimited svg { color: var(--accent); }
.storage-unlimited span { font-size: 13px; font-weight: 500; }

.storage-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

.storage-stat { text-align: center; }

.storage-stat-value {
    font-size: 28px;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.02em;
}

.storage-stat-unit {
    font-size: 14px;
    color: var(--text-secondary);
    margin-left: 2px;
}

.storage-stat-label {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.storage-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--stroke-divider);
}

/* ─── Share Page ─── */
.share-info { text-align: center; padding: 20px 0; }
.share-file-icon { margin-bottom: 12px; color: var(--accent); }
.share-info h2 {
    font-size: 18px;
    margin-bottom: 4px;
    font-weight: var(--font-weight-semibold);
}
.share-meta { color: var(--text-secondary); font-size: 14px; }
.share-actions { margin-top: 16px; }

/* ─── Utilities ─── */
.hidden { display: none !important; }

/* ─── Toast ─── */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 300;
}

.toast {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--mica-card);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-flyout);
    padding: 12px 16px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-primary);
    animation: toastIn 250ms cubic-bezier(0.1, 0.9, 0.2, 1);
}

.toast-success { border-left: 3px solid #0f7b0f; }
.toast-error { border-left: 3px solid #c42b1c; }
.toast-warning { border-left: 3px solid #9d5d00; }
.toast-info { border-left: 3px solid var(--accent); }

@keyframes toastIn {
    from { transform: translateY(12px) scale(0.98); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

@keyframes toastOut {
    from { transform: translateY(0) scale(1); opacity: 1; }
    to { transform: translateY(12px) scale(0.98); opacity: 0; }
}

/* ─── Shared Links Page ─── */
.share-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.share-card {
    border: 1px solid var(--stroke-card);
    border-radius: 8px;
    background: var(--mica-card);
    transition: border-color 0.15s;
}
.share-card:hover {
    border-color: var(--stroke-divider-strong);
}
.share-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--stroke-divider);
}
.share-card-info {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}
.share-card-filename {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.share-status {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 500;
    flex-shrink: 0;
}
.share-status-active {
    background: rgba(46, 160, 67, 0.12);
    color: #2ea043;
}
.share-status-expired {
    background: rgba(218, 109, 40, 0.12);
    color: #da6d28;
}
.share-status-revoked {
    background: rgba(218, 60, 60, 0.12);
    color: #da3c3c;
}
.share-card-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}
.share-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 10px 16px;
    font-size: 12px;
    color: var(--text-tertiary);
}
.share-card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}
.share-meta-created {
    margin-left: auto;
}
.empty-state {
    text-align: center;
    padding: 64px 24px;
    color: var(--text-tertiary);
    font-size: 14px;
}

/* ─── Admin Tabs ─── */
.admin-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--stroke-divider);
    margin-bottom: 24px;
}
.admin-tab {
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}
.admin-tab:hover {
    color: var(--text-primary);
}
.admin-tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}
.admin-tab-panel.hidden {
    display: none;
}
.role-select {
    padding: 4px 8px;
    font-size: 13px;
    border: 1px solid var(--stroke-card);
    border-radius: 6px;
    background: var(--mica-card);
    color: var(--text-primary);
    cursor: pointer;
}
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
    vertical-align: middle;
}
.status-dot.active {
    background: #2ea043;
}
.status-dot.disabled {
    background: var(--text-tertiary);
}
.badge-you {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-left: 4px;
}
.quota-input {
    width: 64px;
    padding: 4px 6px;
    font-size: 13px;
    border: 1px solid var(--stroke-card);
    border-radius: 6px;
    background: var(--mica-card);
    color: var(--text-primary);
    text-align: right;
}
.quota-unit {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-left: 2px;
}

/* ─── Footer ─── */
.site-footer {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    text-align: center;
    padding: 16px 24px;
    font-size: 12px;
    color: var(--text-tertiary);
    background: var(--mica-base);
}
.site-footer strong {
    font-weight: 600;
    color: var(--text-secondary);
}
.footer-sep {
    color: var(--text-tertiary);
}

/* ─── Language Switcher ─── */
.lang-switcher {
    padding: 4px 8px;
}

.lang-switcher .lang-form {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: background 120ms ease;
}

.lang-switcher .lang-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
}

/* ─── Custom Dropdown ─── */
.lang-dropdown {
    position: relative;
}

.lang-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 2px 0;
    transition: color 120ms ease;
}

.lang-dropdown-trigger:hover {
    color: var(--text-primary);
}

.lang-dropdown-trigger svg {
    transition: transform 150ms ease;
    flex-shrink: 0;
}

.lang-dropdown.open .lang-dropdown-trigger svg {
    transform: rotate(180deg);
}

.lang-dropdown-panel {
    display: none;
    position: absolute;
    bottom: calc(100% + 4px);
    right: 0;
    min-width: 140px;
    background: #ffffff;
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
    padding: 4px;
    z-index: 200;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 120ms ease, transform 120ms ease;
}

.lang-dropdown.open .lang-dropdown-panel {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 7px 10px;
    border: none;
    background: none;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: left;
    transition: background 80ms ease, color 80ms ease;
}

.lang-option:hover {
    background: var(--fill-subtle);
    color: var(--text-primary);
}

.lang-option.active {
    color: var(--accent);
    font-weight: var(--font-weight-semibold);
}

.lang-option-divider {
    height: 1px;
    background: var(--stroke-divider);
    margin: 4px 8px;
}

.lang-option.active::after {
    content: '';
    margin-left: auto;
    width: 14px;
    height: 14px;
    background-image: url("data:image/svg+xml,%3Csvg width='14' height='14' viewBox='0 0 24 24' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5 13l4 4L19 7' stroke='%230078d4' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    flex-shrink: 0;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s cubic-bezier(0.1, 0.9, 0.2, 1);
    }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .main-content::before { margin-left: 0; }
    .file-size-col, .file-modified-col { display: none; }
    .form-row { grid-template-columns: 1fr; }
    .settings-profile-card { flex-direction: column; text-align: center; padding: 24px; }
    .settings-role-badge { margin-top: 4px; }
    .storage-detail-grid { flex-direction: column; gap: 24px; }
    .storage-stats { gap: 24px; }
}

/* ─── Preview Modal ─── */
.preview-dialog { width: 900px; max-width: 90vw; max-height: 90vh; border-radius: var(--radius-md); background: var(--mica-card); box-shadow: var(--shadow-dialog); display: flex; flex-direction: column; overflow: hidden; }
.preview-dialog-attr { width: 420px; max-width: 90vw; }
.preview-dialog-text { width: 900px; max-width: 90vw; min-height: 560px; }
.preview-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 16px; border-bottom: 1px solid var(--stroke-divider); min-height: 44px; background: var(--mica-card); border-radius: var(--radius-md) var(--radius-md) 0 0; flex-shrink: 0; }
.preview-header-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.preview-header-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.preview-filename { font-weight: 600; font-size: 13px; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 400px; }
.preview-lang-badge { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 10px; background: var(--fill-muted); color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.preview-size { font-size: 12px; color: var(--text-tertiary); }
.preview-download-btn { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; padding: 5px 12px; }
.preview-close { font-size: 20px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-sm); border: none; background: none; cursor: pointer; color: var(--text-secondary); transition: background 0.15s; }
.preview-close:hover { background: var(--fill-muted); color: var(--text-primary); }
.preview-body { padding: 0; display: flex; align-items: stretch; justify-content: center; min-height: 0; position: relative; overflow: hidden; background: var(--mica-card); border-radius: 0 0 var(--radius-md) var(--radius-md); border: 1px solid var(--stroke-card); border-top: none; flex: 1; }
.preview-dialog-attr .preview-body { min-height: auto; }
.preview-content { width: 100%; height: 100%; display: flex; align-items: stretch; }
.preview-loading { color: var(--text-tertiary); font-size: 14px; padding: 40px; }
.preview-error { color: var(--danger); font-size: 14px; padding: 40px; text-align: center; }
.preview-image { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 2px; }
.preview-video { max-width: 100%; max-height: 100%; outline: none; }
.preview-pdf { width: 100%; height: 100%; border: none; }
.preview-audio-wrap { display: flex; flex-direction: column; align-items: center; gap: 24px; padding: 40px; }
.preview-audio-icon { color: var(--text-tertiary); opacity: 0.5; }
.preview-audio { width: 100%; max-width: 480px; }
.preview-unsupported { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 60px 20px; color: var(--text-secondary); text-align: center; }

.preview-attributes { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 32px 28px; color: var(--text-primary); width: 100%; }
.preview-attr-icon { color: var(--text-tertiary); opacity: 0.6; margin-bottom: 4px; }
.preview-attr-row { display: flex; width: 100%; justify-content: space-between; gap: 16px; font-size: 13px; padding: 8px 0; border-bottom: 1px solid var(--stroke-divider); }
.preview-attr-row:last-of-type { border-bottom: none; }
.preview-attr-label { color: var(--text-secondary); flex-shrink: 0; }
.preview-attr-value { color: var(--text-primary); text-align: right; word-break: break-all; }
.preview-attr-download { margin-top: 12px; }

/* Text editor — identical in preview and edit mode */
.preview-editor {
    width: 100%;
    height: 100%;
    min-height: 480px;
    max-height: none;
    padding: 16px 20px;
    margin: 0;
    font-family: 'Cascadia Code', 'Cascadia Mono', 'Consolas', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    color: #1a1a1a;
    background: #ffffff;
    border: none;
    border-radius: 0;
    resize: none;
    outline: none;
    tab-size: 4;
    white-space: pre;
    overflow: auto;
}
.preview-editor[readonly] { cursor: default; }
.preview-editor:focus { box-shadow: none; }

/* Preview markdown — clean light theme */
.preview-markdown { padding: 32px 40px; max-height: 100%; overflow: auto; width: 100%; text-align: left; font-size: 15px; line-height: 1.7; color: var(--text-primary); background: #ffffff; }
.preview-markdown h1, .preview-markdown h2, .preview-markdown h3, .preview-markdown h4 { margin: 24px 0 12px; font-weight: 600; }
.preview-markdown h1 { font-size: 28px; border-bottom: 1px solid var(--stroke-divider); padding-bottom: 8px; }
.preview-markdown h2 { font-size: 22px; border-bottom: 1px solid var(--stroke-divider); padding-bottom: 6px; }
.preview-markdown h3 { font-size: 18px; }
.preview-markdown p { margin: 0 0 16px; }
.preview-markdown a { color: var(--accent); text-decoration: none; }
.preview-markdown a:hover { text-decoration: underline; }
.preview-markdown code { background: var(--fill-subtle); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; font-family: 'Cascadia Code', 'Consolas', monospace; }
.preview-markdown pre { background: #f5f5f5; color: #1a1a1a; padding: 16px 20px; border-radius: var(--radius-sm); border: 1px solid var(--stroke-divider); overflow: auto; margin: 16px 0; }
.preview-markdown pre code { background: transparent; padding: 0; color: inherit; font-size: 13px; }
.preview-markdown blockquote { border-left: 3px solid var(--accent); margin: 16px 0; padding: 8px 16px; color: var(--text-secondary); background: var(--fill-subtle); border-radius: 0 4px 4px 0; }
.preview-markdown ul, .preview-markdown ol { padding-left: 24px; margin: 12px 0; }
.preview-markdown li { margin: 4px 0; }
.preview-markdown table { border-collapse: collapse; width: 100%; margin: 16px 0; }
.preview-markdown th, .preview-markdown td { border: 1px solid var(--stroke-divider); padding: 8px 12px; text-align: left; }
.preview-markdown th { background: var(--fill-subtle); font-weight: 600; }
.preview-markdown img { max-width: 100%; border-radius: 4px; }
.preview-markdown hr { border: none; border-top: 1px solid var(--stroke-divider); margin: 24px 0; }

/* Gallery navigation */
.preview-gallery { position: absolute; top: 0; left: 0; right: 0; bottom: 0; pointer-events: none; z-index: 10; }
.preview-nav { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border-radius: 50%; border: none; background: rgba(255,255,255,0.85); color: var(--text-primary); font-size: 24px; cursor: pointer; pointer-events: auto; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 8px rgba(0,0,0,0.15); transition: all 0.2s; backdrop-filter: blur(8px); z-index: 11; }
.preview-nav:hover { background: #fff; box-shadow: 0 4px 16px rgba(0,0,0,0.2); transform: translateY(-50%) scale(1.08); }
.preview-nav-prev { left: 16px; }
.preview-nav-next { right: 16px; }

/* Status indicators */
.preview-status {
    display: inline-block;
    font-size: 11px;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 8px;
    vertical-align: middle;
}
.preview-status-saved { background: #dff6dd; color: #0f7b0f; }
.preview-status-modified { background: #fff4ce; color: #9d5d00; }
.preview-status-saving { background: #e1effa; color: #005fb8; }
.preview-status-error { background: #fdf2f2; color: #c42b1c; }

/* Header buttons — identical sizing for Edit/Save/Download */
.preview-header-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-size: 12px;
    line-height: 1.4;
    border-radius: var(--radius-sm);
    border: 1px solid var(--stroke-control);
    background: var(--mica-card);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-weight: var(--font-weight-regular);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    vertical-align: middle;
    transition: background 120ms ease, border-color 120ms ease;
}
.preview-header-btn:hover {
    background: var(--fill-subtle);
    border-color: var(--stroke-card);
    text-decoration: none;
}
.preview-header-btn.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
    border-color: transparent;
}
.preview-header-btn.btn-primary:hover {
    background: var(--accent-hover);
    border-color: transparent;
}
.preview-header-btn.btn-secondary {
    background: var(--mica-card);
}

@media (max-width: 768px) {
    .modal { inset: 0; }
    .preview-dialog,
    .preview-dialog-attr,
    .preview-dialog-text { max-width: 100%; max-height: 100%; width: 100%; min-height: 0; border-radius: 0; }
    .preview-header { border-radius: 0; }
    .preview-body { border-radius: 0; }
    .preview-filename { max-width: 180px; }
    .preview-nav { width: 36px; height: 36px; font-size: 20px; }
    .preview-nav-prev { left: 8px; }
    .preview-nav-next { right: 8px; }
    .preview-markdown { padding: 20px; }
    .preview-editor { min-height: 50vh; font-size: 13px; }
}
.form-group .toggle-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    margin-bottom: 0;
}
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--fill-muted);
    border-radius: 12px;
    transition: background 0.2s;
    flex-shrink: 0;
}
.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.form-group .toggle-label input[type="checkbox"] {
    display: none;
}
.form-group .toggle-label input[type="checkbox"]:checked + .toggle-switch {
    background: var(--accent);
}
.form-group .toggle-label input[type="checkbox"]:checked + .toggle-switch::after {
    transform: translateX(20px);
}
.file-grace-col {
    width: 100px;
    text-align: right;
    padding-right: 16px;
}
.file-grace {
    text-align: right;
    padding-right: 16px;
    color: var(--text-secondary);
    font-size: 13px;
    white-space: nowrap;
}
.grace-expired {
    color: var(--danger);
    font-weight: var(--font-weight-semibold);
}
.grace-hours {
    color: var(--warning);
}

/* ─── Batch selection ─── */
.file-select-col {
    width: 44px;
    text-align: center;
}

.file-select-col input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

.batch-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    background: var(--mica-card);
    border: 1px solid var(--stroke-card);
    border-radius: var(--radius-md);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.batch-toolbar.hidden {
    display: none;
}

.batch-count {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

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

.batch-actions.hidden {
    display: none;
}