:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-dark: #0f0f14;
    --bg-card: #1a1a24;
    --bg-input: #252532;
    --bg-hover: #2a2a3a;
    --text-primary: #f1f1f1;
    --text-secondary: #888899;
    --border-color: #2d2d3d;
    --accent-glow: rgba(99, 102, 241, 0.15);
}

* {
    box-sizing: border-box;
}

body {
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    padding: 16px;
    font-size: 14px;
}

.container-fluid {
    max-width: 1600px;
}

h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.card-body {
    padding: 1rem;
}

.server-panel {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 1rem;
    height: fit-content;
    position: sticky;
    top: 16px;
}

.server-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.server-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.server-item {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    position: relative;
}

.server-item:hover {
    background: var(--bg-hover);
    border-color: var(--border-color);
}

.server-item.active {
    background: var(--accent-glow);
    border-color: var(--primary-color);
}

.server-link {
    flex: 1;
    padding: 10px 12px;
    text-decoration: none;
    color: inherit;
}

.server-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-primary);
}

.server-info {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.server-ips {
    font-size: 10px;
    color: var(--primary-color);
    margin-top: 2px;
}

.btn-delete {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    cursor: pointer;
    opacity: 0;
    transition: all 0.15s ease;
}

.server-item:hover .btn-delete {
    opacity: 1;
}

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

.empty-state {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
}

.empty-panel {
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 60px 20px;
    text-align: center;
    color: var(--text-secondary);
}

.collapse-toggle {
    font-size: 13px;
}

.form-control, .form-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 13px;
    transition: all 0.15s ease;
}

.form-control:focus, .form-select:focus {
    background: var(--bg-input);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--accent-glow);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.form-label {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 4px;
}

.code-textarea {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 1.5;
}

.btn {
    border-radius: 6px;
    font-weight: 500;
    font-size: 13px;
    padding: 8px 16px;
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-success {
    background: var(--success-color);
    border-color: var(--success-color);
}

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
}

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

.nav-modern {
    border-bottom: 1px solid var(--border-color);
    gap: 4px;
}

.nav-modern .nav-link {
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 13px;
    padding: 10px 16px;
    border-radius: 6px 6px 0 0;
    transition: all 0.15s ease;
}

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

.nav-modern .nav-link.active {
    background: var(--bg-card);
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.tab-content {
    background: var(--bg-card);
    border-radius: 0 0 12px 12px;
    border: 1px solid var(--border-color);
    border-top: none;
    padding: 1.25rem;
}

.form-section {
    margin-bottom: 1rem;
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.ip-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px;
    background: var(--bg-input);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    max-height: 120px;
    overflow-y: auto;
}

.ip-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: var(--bg-card);
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.ip-checkbox:hover {
    background: var(--bg-hover);
}

.ip-checkbox input {
    accent-color: var(--primary-color);
}

.ip-checkbox input:checked + span {
    color: var(--primary-color);
}

.ip-actions a {
    color: var(--text-secondary);
    text-decoration: none;
}

.ip-actions a:hover {
    color: var(--primary-color);
}

.alert {
    border-radius: 6px;
    border: none;
    font-size: 13px;
    padding: 10px 14px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    color: #6ee7b7;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fcd34d;
}

.badge {
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
}

.progress {
    background: var(--bg-input);
    border-radius: 4px;
    height: 6px;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), #818cf8);
    border-radius: 4px;
}

.job-card {
    background: var(--bg-input);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 1rem;
    margin-bottom: 10px;
    transition: all 0.15s ease;
}

.job-card:hover {
    border-color: var(--primary-color);
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.job-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 10px;
}

.stat-item {
    text-align: center;
    padding: 8px;
    background: var(--bg-card);
    border-radius: 6px;
}

.stat-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.output-box {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    min-height: 120px;
    max-height: 250px;
    overflow: auto;
    padding: 12px;
    margin: 0;
}

.loading-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.6s linear infinite;
}

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

.status-summary {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.summary-stat {
    color: var(--text-secondary);
}

.summary-stat strong {
    color: var(--success-color);
}

.summary-divider {
    color: var(--border-color);
}

.servers-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.server-card {
    background: var(--bg-input);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.2s ease;
}

.server-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.server-card.has-active {
    border-color: rgba(16, 185, 129, 0.4);
}

.server-card.expanded {
    border-color: var(--primary-color);
}

.server-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.server-card-header:hover {
    background: var(--bg-hover);
}

.server-card-info {
    flex: 1;
}

.server-card-name {
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
}

.server-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    margin-left: 24px;
}

.active-badge {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
}

.server-card-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

.server-stat {
    text-align: center;
    min-width: 60px;
}

.stat-num {
    display: block;
    font-size: 18px;
    font-weight: 700;
}

.stat-num.sent {
    color: var(--success-color);
}

.stat-num.failed {
    color: var(--danger-color);
}

.stat-lbl {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.expand-icon {
    color: var(--text-secondary);
    transition: transform 0.2s ease;
    margin-left: 12px;
}

.expand-icon.rotated {
    transform: rotate(180deg);
}

.server-card-drops {
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
    padding: 12px;
}

.drop-item {
    background: var(--bg-input);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
}

.drop-item:last-child {
    margin-bottom: 0;
}

.drop-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.drop-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.drop-id {
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

.drop-status {
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
}

.drop-status.running {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

.drop-status.paused {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
}

.drop-status.stopped {
    background: rgba(100, 100, 120, 0.2);
    color: #888899;
}

.drop-ar {
    font-size: 11px;
    color: var(--text-secondary);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ar-more {
    background: var(--bg-hover);
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 6px;
    font-size: 10px;
}

.drop-progress-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.drop-progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    overflow: hidden;
}

.drop-progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.drop-progress-fill.running {
    background: linear-gradient(90deg, var(--success-color), #34d399);
}

.drop-progress-fill.paused {
    background: var(--warning-color);
}

.drop-progress-fill.stopped {
    background: var(--text-secondary);
}

.drop-progress-text {
    font-size: 12px;
    font-weight: 600;
    min-width: 40px;
    text-align: right;
}

.drop-stats {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.drop-error {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 11px;
    margin-bottom: 10px;
    font-family: 'JetBrains Mono', monospace;
}

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

.btn-drop {
    padding: 5px 12px;
    border-radius: 5px;
    font-size: 11px;
    font-weight: 500;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-drop:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-drop.pause:hover {
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.btn-drop.resume:hover {
    border-color: var(--success-color);
    color: var(--success-color);
}

.btn-drop.stop:hover, .btn-drop.delete:hover {
    border-color: var(--danger-color);
    color: var(--danger-color);
}

.btn-drop.config:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

@media (max-width: 992px) {
    .server-panel {
        position: static;
    }
    .job-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    body {
        padding: 8px;
    }
    .tab-content {
        padding: 1rem;
    }
}