/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    --success-color: #10b981;
    --success-light: #d1fae5;
    --danger-color: #ef4444;
    --danger-light: #fee2e2;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.6);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(148, 163, 184, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

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

.logo i {
    font-size: 28px;
    color: var(--primary-color);
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5));
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Stats */
.stats {
    display: flex;
    gap: 32px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    transition: var(--transition-normal);
}

.stat-value.online {
    color: var(--success-color);
    text-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

.stat-value.offline {
    color: var(--danger-color);
    text-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
}

.stat-value.total {
    color: var(--primary-color);
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

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

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
}

/* Main Content */
.main {
    padding: 32px 0;
    background: var(--bg-primary);
    min-height: calc(100vh - 80px);
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.actions {
    display: flex;
    gap: 12px;
}

/* Servers Grid */
.servers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* Server Card */
.server-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.server-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.server-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: rgba(99, 102, 241, 0.3);
}

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

.server-card.online {
    border-left: 3px solid var(--success-color);
}

.server-card.offline {
    border-left: 3px solid var(--danger-color);
}

.server-card.checking {
    border-left: 3px solid var(--warning-color);
}

.server-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 16px;
}

.server-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background: var(--bg-tertiary);
    color: var(--primary-color);
    transition: all var(--transition-normal);
}

.server-card.online .server-icon {
    background: var(--success-light);
    color: var(--success-color);
}

.server-card.offline .server-icon {
    background: var(--danger-light);
    color: var(--danger-color);
}

.server-card.checking .server-icon {
    background: var(--warning-light);
    color: var(--warning-color);
}

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

.server-actions button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 14px;
}

.server-actions button:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.server-actions button.delete:hover {
    color: var(--danger-color);
    background: var(--danger-light);
}

.server-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.server-host {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: 'SF Mono', monospace;
    margin-bottom: 8px;
}

.server-description {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 16px;
}

.server-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.online {
    background: var(--success-light);
    color: var(--success-color);
}

.status-badge.offline {
    background: var(--danger-light);
    color: var(--danger-color);
}

.status-badge.checking {
    background: var(--warning-light);
    color: var(--warning-color);
}

.status-badge i {
    font-size: 8px;
}

.status-badge.online i {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.ping-time {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.ping-time .value {
    color: var(--text-primary);
    font-weight: 600;
}

.last-check {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 24px;
    opacity: 0.3;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 14px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-small {
    max-width: 400px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 24px 0;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: 0 24px;
}

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

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Icon Selector */
.icon-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.icon-option {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 20px;
    color: var(--text-secondary);
}

.icon-option:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.icon-option.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header-content {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }
    
    .stats {
        justify-content: center;
        gap: 24px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        max-width: none;
    }
    
    .actions {
        justify-content: stretch;
    }
    
    .actions button {
        flex: 1;
    }
    
    .servers-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.server-card {
    animation: fadeIn 0.3s ease forwards;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--warning-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Toast Notification */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    min-width: 300px;
}

.toast.success {
    border-left: 3px solid var(--success-color);
}

.toast.error {
    border-left: 3px solid var(--danger-color);
}

.toast.info {
    border-left: 3px solid var(--primary-color);
}

.toast i {
    font-size: 20px;
}

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

.toast.error i {
    color: var(--danger-color);
}

.toast.info i {
    color: var(--primary-color);
}

.toast-message {
    flex: 1;
    font-size: 14px;
}

.toast-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.toast.hiding {
    animation: slideOut 0.3s ease forwards;
}