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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a26;
    --purple-primary: #7c3aed;
    --purple-secondary: #9333ea;
    --purple-accent: #a855f7;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a0a2e 100%);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Screens */
.screen {
    display: none;
}

.screen.active {
    display: flex;
}

/* Login Screen */
#loginScreen {
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    background: var(--bg-secondary);
    border: 2px solid var(--purple-primary);
    border-radius: 20px;
    padding: 60px 50px;
    box-shadow: 0 0 50px rgba(124, 58, 237, 0.3);
    width: 450px;
    animation: fadeIn 0.5s ease;
}

.logo-section {
    text-align: center;
    margin-bottom: 40px;
}

.logo-text {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--purple-primary), var(--purple-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(124, 58, 237, 0.5);
    letter-spacing: 4px;
}

.logo-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 10px;
    letter-spacing: 2px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Input Fields */
.input-field {
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 10px;
    padding: 15px 20px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.input-field:focus {
    outline: none;
    border-color: var(--purple-primary);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
}

.input-field::placeholder {
    color: var(--text-secondary);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--purple-primary), var(--purple-secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
}

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

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(239, 68, 68, 0.4);
}

.btn-small {
    padding: 8px 16px;
    font-size: 12px;
    border-radius: 6px;
}

/* Dashboard Layout */
#dashboardScreen {
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 2px solid var(--purple-primary);
    padding: 30px 0;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 0 30px 30px;
    border-bottom: 1px solid var(--bg-tertiary);
}

.sidebar-header h2 {
    font-size: 32px;
    background: linear-gradient(135deg, var(--purple-primary), var(--purple-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
}

.sidebar-subtitle {
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 5px;
}

.nav-menu {
    list-style: none;
    padding: 20px 0;
    flex: 1;
}

.nav-item {
    padding: 15px 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-secondary);
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.2));
    border-left: 4px solid var(--purple-primary);
    color: var(--purple-accent);
}

.nav-item.logout {
    margin-top: auto;
    color: var(--danger);
}

.nav-icon {
    font-size: 20px;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

.page-title {
    font-size: 36px;
    margin-bottom: 30px;
    background: linear-gradient(135deg, var(--purple-primary), var(--purple-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 2px solid var(--purple-primary);
    border-radius: 15px;
    padding: 30px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.3);
}

.stat-icon {
    font-size: 48px;
}

.stat-info h3 {
    font-size: 36px;
    color: var(--purple-accent);
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 5px;
}

/* Table */
.table-container {
    background: var(--bg-secondary);
    border: 2px solid var(--purple-primary);
    border-radius: 15px;
    overflow: hidden;
}

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

.data-table thead {
    background: var(--bg-tertiary);
}

.data-table th {
    padding: 20px;
    text-align: left;
    color: var(--purple-accent);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 1px;
}

.data-table td {
    padding: 20px;
    border-top: 1px solid var(--bg-tertiary);
    color: var(--text-primary);
}

.data-table tbody tr {
    transition: all 0.3s ease;
}

.data-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

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

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

.status-expired {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 2px solid var(--purple-primary);
    border-radius: 20px;
    padding: 40px;
    width: 500px;
    animation: slideUp 0.3s ease;
}

.modal-content h2 {
    margin-bottom: 25px;
    color: var(--purple-accent);
}

.modal-actions {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.modal-actions button {
    flex: 1;
}

/* Error Message */
.error-message {
    color: var(--danger);
    font-size: 14px;
    margin-top: 10px;
    text-align: center;
}

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

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--purple-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--purple-accent);
}