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

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    animation: fadeInDown 0.6s ease-out;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    background: var(--bg-color);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s ease-out;
}

.search-section {
    margin-bottom: 30px;
}

.input-wrapper {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
}

#domainInput {
    flex: 1;
    padding: 16px 20px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    outline: none;
    transition: all 0.3s ease;
    background: white;
}

#domainInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn-primary {
    padding: 16px 32px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

.example-links {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.example {
    color: var(--primary-color);
    text-decoration: none;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(79, 70, 229, 0.1);
    transition: all 0.2s ease;
}

.example:hover {
    background: rgba(79, 70, 229, 0.2);
    transform: translateY(-1px);
}

.loader {
    text-align: center;
    padding: 40px;
    animation: fadeIn 0.3s ease;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.hidden {
    display: none !important;
}

.error-message {
    background: #fee2e2;
    border: 1px solid #fecaca;
    color: #991b1b;
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

.results {
    animation: fadeIn 0.5s ease;
}

.result-card {
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.3s ease;
}

.result-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 16px 24px;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

.info-row {
    display: flex;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-row:last-child {
    border-bottom: none;
}

.label {
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 180px;
    flex-shrink: 0;
}

.value {
    color: var(--text-primary);
    flex: 1;
    word-break: break-word;
}

.dns-records {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dns-record {
    background: var(--bg-color);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.rkn-status {
    padding: 20px 0;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 20px;
}

.status-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    flex-shrink: 0;
}

.status-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.status-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.status-icon::before {
    font-size: 2rem;
}

.status-text {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.status-details {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.rkn-details {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

footer {
    text-align: center;
    color: white;
    margin-top: 40px;
    padding-top: 20px;
}

footer p {
    margin: 8px 0;
    opacity: 0.9;
}

.disclaimer {
    font-size: 0.85rem;
    opacity: 0.7;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 2rem;
    }

    main {
        padding: 20px;
    }

    .input-wrapper {
        flex-direction: column;
    }

    .btn-primary {
        justify-content: center;
    }

    .info-row {
        flex-direction: column;
        gap: 8px;
    }

    .label {
        min-width: auto;
    }

    .status-indicator {
        flex-direction: column;
        text-align: center;
    }
}