/* ============================================================================
   VPN Bot Admin Panel - Enhanced Styles v2.0
   Modern, responsive design with glassmorphism, skeleton loaders, and smooth animations
   ============================================================================ */

:root {
    --primary-color: #4f46e5;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --purple-color: #8b5cf6;
    --dark-color: #1f2937;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Animation timings */
    --transition-fast: 0.15s;
    --transition-base: 0.3s;
    --transition-slow: 0.5s;
    --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(30, 41, 59, 0.3);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    border: 2px solid rgba(30, 41, 59, 0.3);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #f093fb 100%);
}

/* Firefox Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: #667eea rgba(30, 41, 59, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================================================
   SKELETON LOADERS
   ============================================================================ */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 25%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}

.skeleton-text {
    height: 16px;
    margin-bottom: 12px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 16px;
}

/* ============================================================================
   LOGIN SCREEN
   ============================================================================ */

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

/* Animated background particles */
.login-container::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    animation: float 10s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: 48px;
    width: 100%;
    max-width: 450px;
    color: var(--dark-color);
    position: relative;
    z-index: 1;
    transform: translateY(0);
    transition: transform var(--transition-base) var(--ease-out);
}

.login-box:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.logo-admin {
    display: block;
    margin: 0 auto 1.5rem;
    max-width: 200px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

.login-header i {
    font-size: 56px;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: inline-block;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.login-header h1 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--dark-color);
    letter-spacing: -0.5px;
}

.login-header p {
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    color: var(--dark-color);
    font-size: 14px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.form-group label i {
    margin-right: 8px;
    color: var(--primary-color);
}

.form-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 16px;
    transition: all var(--transition-base) var(--ease-out);
    background: white;
    color: var(--dark-color);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    transform: translateY(-2px);
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border-left: 4px solid var(--danger-color);
    padding: 14px 18px;
    border-radius: 10px;
    margin-bottom: 20px;
    color: #991b1b;
    font-size: 14px;
    font-weight: 600;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.login-footer {
    margin-top: 28px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.login-footer i {
    margin-right: 8px;
    color: var(--success-color);
}

/* ============================================================================
   BUTTONS (Enhanced)
   ============================================================================ */

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base) var(--ease-out);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 100%);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #9ca3af 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #34d399 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #f87171 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #fbbf24 100%);
    color: white;
}

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

.btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ============================================================================
   DASHBOARD
   ============================================================================ */

.dashboard-container {
    min-height: 100vh;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
}

.dashboard-header {
    background: var(--bg-secondary);
    padding: 20px 36px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.header-logo {
    height: 36px;
    width: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.15));
}

.header-divider {
    color: var(--border-color);
    font-size: 24px;
    font-weight: 300;
}

.header-left i {
    font-size: 28px;
    color: var(--primary-color);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.header-left h1 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 18px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-base);
}

.status-indicator i {
    font-size: 10px;
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.status-indicator.connected {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.status-indicator.disconnected {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.admin-user {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 700;
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

/* ============================================================================
   DASHBOARD CONTENT
   ============================================================================ */

.dashboard-content {
    flex: 1;
    padding: 36px;
    max-width: 1800px;
    margin: 0 auto;
    width: 100%;
}

/* Statistics Grid (Enhanced) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
    margin-bottom: 36px;
}

.stat-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 28px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    transition: all var(--transition-base) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.4), 0 10px 20px -5px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(30, 41, 59, 0.85);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    flex-shrink: 0;
    transition: transform var(--transition-base) var(--ease-bounce);
}

.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(5deg);
}

.bg-primary { background: linear-gradient(135deg, var(--primary-color), #6366f1); color: white; }
.bg-success { background: linear-gradient(135deg, var(--success-color), #34d399); color: white; }
.bg-warning { background: linear-gradient(135deg, var(--warning-color), #fbbf24); color: white; }
.bg-info { background: linear-gradient(135deg, var(--info-color), #60a5fa); color: white; }
.bg-danger { background: linear-gradient(135deg, var(--danger-color), #f87171); color: white; }
.bg-purple { background: linear-gradient(135deg, var(--purple-color), #a78bfa); color: white; }
.bg-dark { background: linear-gradient(135deg, var(--dark-color), #374151); color: white; }
.bg-secondary { background: linear-gradient(135deg, var(--secondary-color), #9ca3af); color: white; }

.stat-info h3 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 6px;
    letter-spacing: -1px;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Tabs (Enhanced) */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 28px;
    border-bottom: 3px solid var(--border-color);
    overflow-x: auto;
    scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base) var(--ease-out);
    border-bottom: 4px solid transparent;
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    position: relative;
}

.tab-btn::before {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 4px;
    background: var(--primary-color);
    transition: width var(--transition-base) var(--ease-out);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(79, 70, 229, 0.1);
    border-radius: 8px 8px 0 0;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::before {
    width: 100%;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeInUp 0.4s var(--ease-out);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Panel (Enhanced) */
.panel {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(16px) saturate(180%);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base) var(--ease-out);
}

.panel:hover {
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.panel-header {
    padding: 24px 28px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, transparent 100%);
}

.panel-header h2 {
    font-size: 20px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 14px;
    letter-spacing: -0.5px;
}

.panel-header h2 i {
    color: var(--primary-color);
    font-size: 24px;
}

.badge {
    background: var(--primary-color);
    color: white;
    padding: 6px 14px;
    border-radius: 14px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.panel-actions {
    display: flex;
    gap: 14px;
    align-items: center;
}

.panel-body {
    padding: 28px;
}

/* Table (Enhanced) */
.table-container {
    overflow-x: auto;
    border-radius: 16px;
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table thead tr {
    background: rgba(51, 65, 85, 0.8);
}

.data-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 700;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.data-table th:first-child {
    border-top-left-radius: 16px;
}

.data-table th:last-child {
    border-top-right-radius: 16px;
}

.data-table td {
    padding: 18px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.data-table tbody tr {
    transition: all var(--transition-fast);
    background: transparent;
}

.data-table tbody tr:hover {
    background: rgba(51, 65, 85, 0.5);
}

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

.data-table tbody tr:last-child td:first-child {
    border-bottom-left-radius: 16px;
}

.data-table tbody tr:last-child td:last-child {
    border-bottom-right-radius: 16px;
}

/* Status badges (Enhanced) */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 14px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.3px;
    transition: all var(--transition-fast);
}

.status-badge:hover {
    transform: scale(1.05);
}

.status-badge.active {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.status-badge.inactive {
    background: rgba(107, 114, 128, 0.2);
    color: var(--secondary-color);
}

.status-badge.expired {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

/* Footer */
.dashboard-footer {
    background: var(--bg-secondary);
    padding: 20px 36px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    border-top: 2px solid var(--border-color);
    font-weight: 600;
}

.dashboard-footer i {
    margin: 0 6px;
    color: var(--primary-color);
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

/* Tablet (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .dashboard-content {
        padding: 28px;
    }

    .stat-card {
        padding: 22px;
    }

    .stat-icon {
        width: 60px;
        height: 60px;
        font-size: 26px;
    }

    .stat-info h3 {
        font-size: 30px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .dashboard-header {
        flex-direction: column;
        gap: 18px;
        padding: 18px;
    }

    .header-right {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .dashboard-content {
        padding: 18px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stat-card {
        padding: 20px;
    }

    .stat-icon {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }

    .stat-info h3 {
        font-size: 28px;
    }

    .tabs {
        overflow-x: auto;
        gap: 6px;
    }

    .tab-btn {
        padding: 12px 20px;
        font-size: 14px;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

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

    .panel-body {
        padding: 18px;
    }

    .login-box {
        padding: 32px;
    }
}

/* ============================================================================
   UTILITIES
   ============================================================================ */

.text-success {
    color: var(--success-color) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

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

.fa-spin {
    animation: fa-spin 1s infinite linear;
}

@keyframes fa-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
    filter: blur(1px);
}

/* Scrollbar (Enhanced) */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* ============================================================================
   MODAL STYLES (Enhanced)
   ============================================================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    max-width: 900px;
    width: 92%;
    max-height: 92vh;
    overflow-y: auto;
    animation: modalSlideIn 0.4s var(--ease-out);
    border: 2px solid var(--border-color);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: 24px 28px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, transparent 100%);
}

.modal-header h2 {
    font-size: 22px;
    font-weight: 800;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.5px;
}

.modal-close {
    background: var(--bg-tertiary);
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 10px;
    border-radius: 10px;
    transition: all var(--transition-base);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--danger-color);
    color: white;
    transform: rotate(90deg);
}

.modal-body {
    padding: 28px;
}

.modal-footer {
    padding: 20px 28px;
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 14px;
    background: var(--bg-tertiary);
}

/* ============================================================================
   USER LINK STYLE
   ============================================================================ */

.user-id-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.user-id-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base) var(--ease-out);
}

.user-id-link:hover {
    color: #6366f1;
}

.user-id-link:hover::after {
    width: 100%;
}