/* Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;
    --secondary-color: #0ea5e9;
    --background: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --code-bg: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

/* Hero Section */
.hero {
    padding: 60px 0 80px;
    background: linear-gradient(180deg, var(--surface) 0%, var(--background) 100%);
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 40px;
}

/* Lookup Form */
.lookup-form {
    max-width: 900px;
    margin: 0 auto;
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.input-group {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.domain-input,
.record-select,
.dns-select {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.domain-input:focus,
.record-select:focus,
.dns-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.lookup-btn {
    width: 100%;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    color: white;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.lookup-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

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

.lookup-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-loader {
    display: flex;
    align-items: center;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

/* Quick Examples */
.quick-examples {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.examples-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.example-btn {
    padding: 6px 14px;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--primary-color);
    background: var(--primary-light);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

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

/* Results Section */
.results-section {
    padding: 40px 0 60px;
}

.results-header {
    margin-bottom: 24px;
}

.results-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.results-title span {
    color: var(--primary-color);
}

.results-meta {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.meta-icon {
    width: 18px;
    height: 18px;
    stroke: currentColor;
}

/* Error Container */
.error-container {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.error-message {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--error);
}

.error-icon {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    flex-shrink: 0;
}

/* Results Container */
.results-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--surface-hover);
    border-bottom: 1px solid var(--border);
}

.result-type {
    display: flex;
    align-items: center;
    gap: 10px;
}

.record-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
}

.record-name {
    font-weight: 600;
    color: var(--text-primary);
}

.record-ttl {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.result-body {
    padding: 20px;
}

.record-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--code-bg);
    color: #e2e8f0;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.record-details {
    margin-top: 16px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.no-records {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.no-records-icon {
    width: 48px;
    height: 48px;
    stroke: var(--text-muted);
    margin-bottom: 16px;
}

/* Info Section */
.info-section {
    padding: 80px 0;
    background: var(--surface);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.info-card {
    padding: 32px;
    background: var(--background);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius);
}

.info-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary-color);
}

.info-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* Record Types Section */
.record-types-section {
    padding: 80px 0;
}

.record-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.record-type-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.record-type-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.record-type-card ul {
    list-style: none;
}

.record-type-card li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}

.record-type-card li:last-child {
    border-bottom: none;
}

.record-type-card li strong {
    font-family: 'JetBrains Mono', monospace;
    color: var(--primary-color);
    margin-right: 8px;
}

/* Footer */
.footer {
    background: var(--code-bg);
    color: #94a3b8;
    padding: 40px 0;
    text-align: center;
}

.footer-content p {
    margin-bottom: 8px;
}

.footer-note {
    font-size: 0.875rem;
    color: #64748b;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .input-group {
        grid-template-columns: 1fr;
    }

    .nav {
        display: none;
    }

    .results-meta {
        flex-direction: column;
        gap: 8px;
    }

    .section-title {
        font-size: 1.5rem;
    }
}

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

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

.result-card:nth-child(2) { animation-delay: 0.1s; }
.result-card:nth-child(3) { animation-delay: 0.2s; }
.result-card:nth-child(4) { animation-delay: 0.3s; }
.result-card:nth-child(5) { animation-delay: 0.4s; }