:root {
    --color-bg-primary: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-card: #0d0d0d;
    --color-text-primary: #ffffff;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-accent: #00d4ff;
    --color-accent-dark: #0099cc;
    --color-accent-hover: #33ddff;
    --color-border: #1f1f23;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-danger: #dc2626;
    --color-purple: #8b5cf6;
    --color-pink: #ec4899;
    --color-gold: #ffd700;
    --color-cyan: #00d4ff;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.8);
    --shadow-glow-cyan: 0 0 48px rgba(0, 212, 255, 0.25);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-mesh: radial-gradient(at 40% 20%, rgba(0, 212, 255, 0.12) 0%, transparent 50%),
                     radial-gradient(at 80% 0%, rgba(139, 92, 246, 0.10) 0%, transparent 50%),
                     radial-gradient(at 0% 50%, rgba(255, 51, 102, 0.08) 0%, transparent 50%);
}

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

body {
    font-family: var(--font-primary);
    background: var(--gradient-mesh), var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.app-sidebar {
    width: 280px;
    background: rgba(10, 10, 10, 0.95);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.sidebar-logo:hover {
    transform: translateX(4px);
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(0,212,255,0.2), transparent 70%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-icon i {
    font-size: 1.25rem;
    color: var(--color-accent);
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1;
}

.sidebar-user {
    padding: 20px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.default-avatar-small {
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 30%, rgba(0,212,255,0.2), transparent 70%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.default-avatar-small i {
    font-size: 1.25rem;
    color: var(--color-accent);
}

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

.user-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    padding: 0 20px 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-item i:first-child {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.nav-item span {
    flex: 1;
}

.nav-external {
    font-size: 0.75rem;
    opacity: 0.5;
}

.nav-item:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.nav-item.active {
    color: var(--color-accent);
    background: rgba(0, 212, 255, 0.1);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-accent);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--color-border);
}

.app-main {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 999;
    backdrop-filter: blur(20px);
}

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

.mobile-menu-toggle {
    display: none;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-text-primary);
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.app-content {
    flex: 1;
    padding: 32px;
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.8125rem;
}

.btn-large {
    padding: 12px 24px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

.btn-primary {
    background: rgba(0, 212, 255, 0.15);
    color: var(--color-accent);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    background: rgba(0, 212, 255, 0.25);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--gradient-primary);
    color: #000000;
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-cyan);
}

.btn-danger {
    background: rgba(220, 38, 38, 0.15);
    color: var(--color-danger);
    border: 1px solid rgba(220, 38, 38, 0.3);
}

.btn-danger:hover {
    background: rgba(220, 38, 38, 0.25);
    transform: translateY(-2px);
}

.main-content {
    min-height: calc(100vh - 200px);
    padding: 32px 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.dashboard-page,
.settings-page {
    padding: 0;
}

.settings-header {
    margin-bottom: 32px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 16px;
    transition: gap var(--transition-normal);
}

.back-link:hover {
    gap: 12px;
}

.dashboard-header {
    margin-bottom: 32px;
}

.user-welcome h1 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 6px;
}

.user-welcome p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.auth-page {
    padding: 60px 0;
    min-height: calc(100vh - 100px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    max-width: 480px;
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

.auth-card {
    background: rgba(13, 13, 13, 0.8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: 40px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-xl);
}

.auth-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: radial-gradient(circle at 30% 30%, rgba(0,212,255,0.2), transparent 70%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-logo i {
    font-size: 2rem;
    color: var(--color-accent);
}

.auth-logo.success {
    background: radial-gradient(circle at 30% 30%, rgba(16, 185, 129, 0.2), transparent 70%);
    border-color: rgba(16, 185, 129, 0.3);
}

.auth-logo.success i {
    color: var(--color-success);
}

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

.auth-header h1 {
    font-size: 1.75rem;
    font-weight: 900;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.875rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-error);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
}

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

.form-group {
    margin-bottom: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
    font-family: var(--font-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.06);
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.input-with-icon input {
    padding-left: 40px;
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.checkbox-label input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.link-accent {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.link-accent:hover {
    color: var(--color-accent-hover);
}

.auth-divider {
    text-align: center;
    margin: 24px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: var(--color-border);
}

.auth-divider span {
    position: relative;
    background: rgba(13, 13, 13, 0.8);
    padding: 0 16px;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
}

.auth-footer a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    color: var(--color-accent-hover);
}

.service-info {
    margin-top: 24px;
    padding: 20px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-xl);
}

.service-info h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.service-info p {
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    font-size: 0.875rem;
}

.service-info ul {
    list-style: none;
}

.service-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.service-info li i {
    color: var(--color-accent);
    width: 20px;
}

.code-input {
    text-align: center;
    font-size: 1.5rem !important;
    letter-spacing: 0.5em;
    font-weight: 700;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.dashboard-card {
    background: rgba(13, 13, 13, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 24px;
    transition: all var(--transition-normal);
}

.dashboard-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    background: radial-gradient(circle at 30% 30%, rgba(0,212,255,0.2), transparent 70%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon i {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.card-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.card-content p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.account-info-section {
    background: rgba(13, 13, 13, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 28px;
    margin-bottom: 32px;
}

.account-info-section h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    font-weight: 500;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-cyan {
    background: rgba(0, 212, 255, 0.15);
    color: var(--color-cyan);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.danger-zone {
    background: rgba(220, 38, 38, 0.05);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: var(--radius-xl);
    padding: 28px;
}

.danger-zone h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-danger);
    display: flex;
    align-items: center;
    gap: 10px;
}

.danger-zone p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.settings-grid {
    display: grid;
    gap: 24px;
    margin-bottom: 32px;
}

.settings-card {
    background: rgba(13, 13, 13, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 28px;
}

.settings-card h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.photo-section {
    display: flex;
    gap: 24px;
    align-items: center;
}

.photo-preview {
    width: 150px;
    height: 150px;
    flex-shrink: 0;
}

.photo-preview img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-border);
}

.default-avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(0,212,255,0.2), transparent 70%);
    border: 2px solid rgba(0, 212, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.default-avatar i {
    font-size: 4rem;
    color: var(--color-accent);
}

.photo-actions {
    flex: 1;
}

.photo-actions .btn {
    margin-right: 10px;
    margin-bottom: 10px;
}

.photo-hint {
    display: block;
    margin-top: 10px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.two-factor-setup {
    text-align: center;
}

.two-factor-setup p {
    margin-bottom: 16px;
    color: var(--color-text-secondary);
}

.qr-code {
    margin: 24px auto;
    padding: 20px;
    background: white;
    border-radius: var(--radius-md);
    display: inline-block;
}

.qr-code img {
    display: block;
}

.secret-code {
    margin: 20px auto;
    padding: 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-md);
    max-width: 400px;
}

.secret-code code {
    font-size: 1.125rem;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    font-weight: 700;
}

.two-factor-enabled {
    text-align: center;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    color: var(--color-success);
    font-weight: 600;
}

.two-factor-enabled p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.sessions-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 18px;
    background: rgba(13, 13, 13, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.sessions-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.session-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: rgba(13, 13, 13, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 20px;
    transition: all var(--transition-normal);
}

.session-card:hover {
    border-color: var(--color-accent);
}

.session-card.current-session {
    border-color: var(--color-accent);
    background: rgba(0, 212, 255, 0.05);
}

.session-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    background: radial-gradient(circle at 30% 30%, rgba(0,212,255,0.2), transparent 70%);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.session-icon i {
    font-size: 1.25rem;
    color: var(--color-accent);
}

.session-info {
    flex: 1;
}

.session-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.session-header h3 {
    font-size: 1rem;
    font-weight: 700;
}

.session-details {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.session-details span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.session-actions {
    flex-shrink: 0;
}

.info-box {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: 24px;
}

.info-box h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-box p {
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.info-box ul {
    list-style: none;
}

.info-box li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.info-box li i {
    color: var(--color-accent);
    width: 16px;
}

.danger-card {
    background: rgba(220, 38, 38, 0.05);
    border: 2px solid rgba(220, 38, 38, 0.3);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.danger-header {
    background: rgba(220, 38, 38, 0.1);
    padding: 20px 28px;
    border-bottom: 1px solid rgba(220, 38, 38, 0.3);
    display: flex;
    align-items: center;
    gap: 12px;
}

.danger-header i {
    font-size: 1.5rem;
    color: var(--color-danger);
}

.danger-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-danger);
    margin: 0;
}

.danger-content {
    padding: 28px;
}

.danger-content p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.danger-content ul {
    list-style: none;
    margin-bottom: 20px;
}

.danger-content li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    color: var(--color-text-secondary);
}

.danger-content li::before {
    content: '•';
    color: var(--color-danger);
    font-size: 1.5rem;
}

.danger-form {
    padding: 28px;
    border-top: 1px solid rgba(220, 38, 38, 0.3);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: rgba(13, 13, 13, 0.95);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding: 20px 24px;
    border-top: 1px solid var(--color-border);
}

.error-page {
    padding: 60px 0;
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-container {
    max-width: 600px;
    text-align: center;
    padding: 0 20px;
}

.error-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 28px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(239,68,68,0.2), transparent 70%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-icon i {
    font-size: 3.5rem;
    color: var(--color-error);
}

.error-container h1 {
    font-size: 5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 14px;
}

.error-container h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.error-container p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

.error-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

.account-footer {
    background: rgba(10, 10, 10, 0.8);
    border-top: 1px solid var(--color-border);
    padding: 28px 0;
    margin-top: 60px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-left p {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.footer-right {
    display: flex;
    gap: 20px;
}

.footer-right a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: color var(--transition-fast);
}

.footer-right a:hover {
    color: var(--color-accent);
}

@media (max-width: 1024px) {
    .app-sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .app-sidebar.active {
        transform: translateX(0);
    }

    .app-main {
        margin-left: 0;
    }

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

    .app-content {
        padding: 24px 20px;
    }

    .app-header {
        padding: 16px 20px;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 1.25rem;
    }

    .btn-text {
        display: none;
    }

    .header-right .btn {
        padding: 8px 12px;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .photo-section {
        flex-direction: column;
        text-align: center;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .session-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .session-actions {
        width: 100%;
    }

    .session-actions .btn {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-right {
        flex-direction: column;
        gap: 10px;
    }

    .sessions-actions {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }

    .session-details {
        flex-direction: column;
        gap: 8px;
    }

    .error-container h1 {
        font-size: 4rem;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.125rem;
    }

    .app-content {
        padding: 20px 16px;
    }
}