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

:root {
    /* Grayscale Dark Theme */
    --primary-color: #6b7280;
    --secondary-color: #4b5563;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-bg: #0a0a0a;
    --card-bg: rgba(30, 30, 30, 0.8);
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --glass-bg: rgba(20, 20, 20, 0.8);
    --glass-border: rgba(75, 85, 99, 0.3);
    --hover-bg: rgba(55, 65, 81, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: linear-gradient(135deg, 
        rgba(107, 114, 128, 0.15) 0%, 
        rgba(75, 85, 99, 0.1) 25%,
        rgba(55, 65, 81, 0.12) 50%,
        rgba(107, 114, 128, 0.15) 75%,
        rgba(75, 85, 99, 0.1) 100%);
    opacity: 1;
    z-index: -1;
    animation: gradientShift 20s ease infinite;
    transform-origin: center center;
}

@keyframes gradientShift {
    0% { 
        transform: translate(-25%, -25%) scale(1.2) rotate(0deg); 
    }
    33% { 
        transform: translate(-20%, -30%) scale(1.3) rotate(3deg); 
    }
    66% { 
        transform: translate(-30%, -20%) scale(1.25) rotate(-3deg); 
    }
    100% { 
        transform: translate(-25%, -25%) scale(1.2) rotate(0deg); 
    }
}

/* Glass Effect */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* Navigation */
.navbar {
    padding: 0.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: 1rem;
}

.nav-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-brand i {
    color: var(--primary-color);
}

.nav-stats {
    display: flex;
    gap: 1rem;
}

.stat-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.stat-badge.active {
    background: rgba(67, 233, 123, 0.1);
    border-color: var(--success-color);
}

.stat-badge i {
    color: var(--primary-color);
}

.stat-badge.active i {
    color: var(--success-color);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
}

/* Header Section */
.header-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s ease;
    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, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

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

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #ff6b6b);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Table Container */
.table-container {
    border-radius: 15px;
    padding: 1.5rem;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.table-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
}

.search-box input {
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    width: 300px;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    border-radius: 10px;
}

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

.devices-table thead tr {
    background: var(--glass-bg);
}

.devices-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.devices-table tbody tr {
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.devices-table tbody tr:hover {
    background: var(--glass-bg);
}

.devices-table td {
    padding: 1rem;
    color: var(--text-primary);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-active {
    background: rgba(67, 233, 123, 0.2);
    color: var(--success-color);
}

.status-inactive {
    background: rgba(245, 87, 108, 0.2);
    color: var(--danger-color);
}

.action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: all 0.3s ease;
    font-size: 1rem;
}

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

.action-btn.edit:hover {
    color: var(--info-color);
}

.action-btn.delete:hover {
    color: var(--danger-color);
}

.action-btn.details:hover {
    color: var(--primary-color);
}

.action-btn.connect:hover {
    color: var(--success-color);
}

.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.loading span {
    display: inline-block;
    margin-left: 1rem;
}

.spinner {
    display: inline-block;
    width: 30px;
    height: 30px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

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

.modal-content {
    width: 90%;
    max-width: 500px;
    border-radius: 15px;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

.modal-large {
    max-width: 700px;
}

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

.modal-header {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
}

.modal-header h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    border-top: 1px solid var(--glass-border);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-control:read-only {
    background: rgba(255, 255, 255, 0.03);
    cursor: not-allowed;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.warning-text {
    color: var(--warning-color);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.key-display {
    background: var(--dark-bg);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    word-break: break-all;
}

.key-display code {
    color: var(--success-color);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.details-grid {
    display: grid;
    gap: 1rem;
}

.detail-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--glass-bg);
    border-radius: 10px;
}

.detail-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.detail-value {
    color: var(--text-primary);
    word-break: break-all;
    font-family: monospace;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 2000;
}

.toast.show {
    transform: translateX(0);
}

.toast i {
    color: var(--success-color);
    font-size: 1.2rem;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.6s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem 1rem;
    }

    .header-section {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .action-buttons {
        width: 100%;
    }

    .action-buttons .btn {
        flex: 1;
    }

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

    .search-box input {
        width: 100%;
    }

    .table-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .modal-content {
        width: 95%;
    }

    .detail-item {
        grid-template-columns: 1fr;
    }

    .nav-stats {
        flex-wrap: wrap;
    }
}
/* About Page Styles */
.about-container {
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.about-container h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.about-section {
    margin-bottom: 2.5rem;
}

.about-section h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-section p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.about-section ul {
    list-style: none;
    padding-left: 0;
}

.about-section ul li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
    color: var(--text-secondary);
}

.about-section ul li i {
    position: absolute;
    left: 0;
    top: 0.25rem;
    color: var(--success-color);
}

.about-section ul li strong {
    color: var(--text-primary);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid var(--glass-border);
}

.github-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(107, 114, 128, 0.4);
    background: linear-gradient(135deg, #4b5563 0%, #374151 100%);
}

.github-link i {
    font-size: 1.2rem;
}

/* User Management Styles */
.users-container {
    padding: 2rem;
}

.users-container h2 {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
/* Badge Styles */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

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

.badge-warning {
    background: var(--warning-color);
    color: white;
}

.badge-info {
    background: var(--info-color);
    color: white;
}

/* Settings Page Styles */
.settings-container {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.settings-container h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.settings-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(30, 30, 30, 0.5);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.settings-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.settings-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Key Page Styles */
.key-container {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.key-container h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}