:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --success-color: #16a34a;
    --warning-color: #d97706;
    --background: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 0.5rem;
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.header-title {
    display: flex;
    align-items: baseline;
    gap: 1rem;
}

.version {
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: var(--background);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    border: 1px solid var(--border);
}

.flow-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.flow-selector label {
    font-weight: 500;
    color: var(--text-secondary);
}

.flow-selector select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--surface);
    color: var(--text-primary);
    font-size: 1rem;
    min-width: 200px;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: #475569;
}

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

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
}

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

.btn-success:hover:not(:disabled) {
    background-color: #059669;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.stats-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-item {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.stat-value.deprecated {
    color: var(--danger-color);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.actions-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.filter-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.filter-label:hover {
    background-color: var(--background);
}

.filter-label.active {
    background-color: var(--primary-color);
    color: white;
}

.filter-label.active input[type="checkbox"] {
    accent-color: white;
}

.filter-label input[type="checkbox"] {
    margin: 0;
}

.filter-label span {
    white-space: nowrap;
}

.search-box input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    background: var(--surface);
    color: var(--text-primary);
    font-size: 1rem;
    width: 300px;
}

.keys-table-container {
    background: var(--surface);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

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

.keys-table th,
.keys-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.keys-table th {
    background-color: #f1f5f9;
    font-weight: 600;
    color: var(--text-primary);
}

.keys-table tbody tr:hover {
    background-color: #f8fafc;
}

.keys-table tbody tr.deprecated {
    opacity: 0.6;
    background-color: #fef2f2;
}

.keys-table tbody tr.deprecated:hover {
    background-color: #fee2e2;
}

.keys-table tbody tr.deprecated .key-preview,
.keys-table tbody tr.deprecated td:nth-child(2) {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.host-group-header {
    background-color: #f1f5f9;
    font-weight: 600;
    transition: background-color 0.2s ease;
    border-left: 4px solid var(--primary-color);
}

.host-group-header:hover {
    background-color: #e2e8f0;
}

.host-group-header.collapsed {
    border-left-color: var(--secondary-color);
}

.host-group-header .expand-icon {
    transition: transform 0.2s ease;
    display: inline-block;
    margin-right: 0.5rem;
    user-select: none;
}

.host-group-header.collapsed .expand-icon {
    transform: rotate(-90deg);
}

.host-group-header input[type="checkbox"] {
    margin: 0;
}

.host-group-header td:first-child {
    width: 50px;
    text-align: center;
}

.host-group-header td:nth-child(2) {
    cursor: pointer;
    user-select: none;
}

.key-row {
    border-left: 4px solid transparent;
}

.key-row.hidden {
    display: none;
}

.host-summary {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.key-count {
    background-color: var(--primary-color);
    color: white;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    margin-left: 0.5rem;
}

.deprecated-count {
    background-color: var(--danger-color);
    color: white;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    margin-left: 0.25rem;
}

.key-preview {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.key-type {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: #e0e7ff;
    color: #3730a3;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.key-type.rsa { background-color: #fef3c7; color: #92400e; }
.key-type.ed25519 { background-color: #dcfce7; color: #166534; }
.key-type.ecdsa { background-color: #e0e7ff; color: #3730a3; }
.key-type.dsa { background-color: #fce7f3; color: #9d174d; }

.deprecated-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: #fecaca;
    color: #991b1b;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    margin-left: 0.5rem;
}

.no-keys-message {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--surface);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
}

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

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.close {
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

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

.modal-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--surface);
    color: var(--text-primary);
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.read-only-field {
    background-color: var(--background) !important;
    cursor: not-allowed;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

.loading-overlay {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    max-width: 400px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

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

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

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

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

    header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .header-title {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .header-title h1 {
        font-size: 2rem;
    }

    .actions-panel {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .filter-controls {
        justify-content: center;
    }

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

    .keys-table-container {
        overflow-x: auto;
    }

    .keys-table {
        min-width: 600px;
    }

    .modal-content {
        margin: 10% auto;
        width: 95%;
    }

    .form-actions {
        flex-direction: column;
    }

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

/* Checkbox styles */
input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary-color);
}

/* Indeterminate checkbox styling */
input[type="checkbox"]:indeterminate {
    background-color: var(--primary-color);
    background-image: linear-gradient(90deg, transparent 40%, white 40%, white 60%, transparent 60%);
    border-color: var(--primary-color);
}

/* Action buttons in table */
.table-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Error states */
.form-group input:invalid,
.form-group textarea:invalid {
    border-color: var(--danger-color);
}

.form-group input:invalid:focus,
.form-group textarea:invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* Success states */
.form-group input:valid,
.form-group textarea:valid {
    border-color: var(--success-color);
}

/* DNS Scan Modal Styles */
.modal-large {
    max-width: 800px;
}

.scan-stats {
    background: var(--background);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

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

.scan-stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.scan-stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.unresolved-count {
    color: var(--danger-color) !important;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.host-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
}

.host-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    transition: background-color 0.2s ease;
}

.host-item:last-child {
    border-bottom: none;
}

.host-item:hover {
    background-color: var(--background);
}

.host-item label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    cursor: pointer;
    margin: 0;
}

.host-name {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-weight: 500;
    color: var(--text-primary);
}

.host-error {
    font-size: 0.75rem;
    color: var(--danger-color);
    margin-left: auto;
    max-width: 200px;
    word-break: break-word;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-style: italic;
}

.scan-progress {
    background: var(--background);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    text-align: center;
}

.scan-progress-text {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s ease;
    border-radius: 4px;
}