/* =========================================================
   Reverse DNS Lookup Page — .rdns-* prefix
   ========================================================= */

/* ── Hero ───────────────────────────────────────────────── */

.rdns-hero-section {
    background: linear-gradient(135deg, var(--primary-50) 0%, #ffffff 100%);
    padding: 80px 0;
    min-height: 580px;
}

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

.rdns-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

@media (max-width: 900px) {
    .rdns-hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

.rdns-hero-title {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text-color);
}

.rdns-hero-subtitle {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--text-color);
}

.rdns-hero-highlight {
    color: var(--primary-500);
    position: relative;
}

.rdns-hero-highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(55, 125, 255, 0.2);
    z-index: -1;
}

.rdns-hero-description {
    font-size: 17px;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.rdns-hero-trust {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rdns-hero-trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

.rdns-hero-trust-item svg {
    color: #4CAF50;
    flex-shrink: 0;
}

/* Form Card */

.rdns-hero-form-wrapper {
    display: flex;
    justify-content: center;
}

.rdns-hero-form-card {
    background: white;
    border-radius: 8px;
    padding: 32px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
}

/* Mode Tabs */

.rdns-mode-tabs {
    display: flex;
    gap: 4px;
    background: var(--gray-100);
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 20px;
}

.rdns-mode-tab {
    flex: 1;
    padding: 8px 12px;
    border: none;
    background: transparent;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.rdns-mode-tab.active {
    background: white;
    color: var(--primary-500);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.rdns-mode-tab:hover:not(.active) {
    color: var(--text-color);
}

.rdns-hero-form-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 4px;
}

.rdns-hero-form-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 16px;
}

.rdns-form-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.rdns-form-input {
    flex: 1;
    min-width: 0;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-color);
    background: white;
    outline: none;
    transition: border-color 0.15s;
}

.rdns-form-input:focus {
    border-color: var(--primary-500);
}

.rdns-form-submit {
    padding: 10px 18px;
    background: var(--primary-500);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s;
}

.rdns-form-submit:hover {
    background: var(--primary-600);
}

/* Alert States */

.rdns-alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 16px;
    margin-top: 14px;
    border-radius: 4px;
    font-size: 0.875rem;
}

.rdns-alert svg {
    flex-shrink: 0;
    margin-top: 1px;
}

.rdns-alert.alert-info {
    background-color: rgb(229, 246, 253);
    color: rgb(1, 67, 97);
}

.rdns-alert.alert-info svg { color: rgb(3, 169, 244); }

.rdns-alert.alert-error {
    background-color: rgb(253, 237, 237);
    color: rgb(95, 33, 32);
}

.rdns-alert.alert-error svg { color: rgb(239, 83, 80); }

.rdns-results {
    margin-top: 8px;
}

/* Result Cards */

.rdns-result-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

.rdns-result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--primary-50);
    border-bottom: 1px solid var(--border-color);
    gap: 12px;
    flex-wrap: wrap;
}

.rdns-result-ip {
    font-family: monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
}

.rdns-result-chip {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
}

.rdns-chip-success {
    background: #dcfce7;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.rdns-chip-neutral {
    background: var(--gray-100);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.rdns-result-body {
    padding: 14px;
}

.rdns-result-field {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 6px 0;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-color);
}

.rdns-result-field:last-child {
    border-bottom: none;
}

.rdns-result-label {
    color: var(--text-muted);
    min-width: 100px;
    flex-shrink: 0;
}

.rdns-result-value {
    font-family: monospace;
    color: var(--text-color);
    word-break: break-all;
}

.rdns-result-api {
    padding: 10px 14px;
    background: var(--gray-50);
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.rdns-result-api-label {
    color: var(--text-muted);
}

.rdns-result-api-url {
    font-family: monospace;
    color: var(--primary-500);
    font-size: 0.8rem;
}

/* Addresses table */

.rdns-addresses-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.rdns-addresses-table th {
    text-align: left;
    padding: 8px 12px;
    background: var(--gray-50);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.8rem;
    border-bottom: 1px solid var(--border-color);
}

.rdns-addresses-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

.rdns-addresses-table tr:last-child td {
    border-bottom: none;
}

.rdns-type-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: monospace;
}

.rdns-type-a {
    background: var(--primary-50);
    color: var(--primary-500);
}

.rdns-type-aaaa {
    background: rgb(229, 246, 253);
    color: rgb(1, 67, 97);
}

/* ── Informational Section (white) ──────────────────────── */

.rdns-info-section {
    background: white;
    padding: 72px 0;
}

.rdns-info-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    gap: 72px;
}

.rdns-info-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.rdns-info-block-alt {
    grid-template-columns: 1fr;
}

.rdns-info-text-wide {
    max-width: 800px;
}

.rdns-info-block-with-header > .rdns-info-heading {
    margin-bottom: 24px;
}

@media (max-width: 900px) {
    .rdns-info-block {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

.rdns-info-heading {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 20px;
}

.rdns-info-body {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-muted);
    margin: 0 0 16px;
}

.rdns-info-body code {
    background: var(--gray-100);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--primary-500);
}

/* Diagram */

.rdns-info-diagram {
    display: flex;
    justify-content: center;
}

.rdns-diagram-card {
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    border-radius: 12px;
    padding: 24px;
    width: 100%;
    max-width: 420px;
}

.rdns-diagram-row {
    padding: 12px 0;
}

.rdns-diagram-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.rdns-diagram-arrow {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.rdns-diagram-source,
.rdns-diagram-dest {
    font-family: monospace;
    font-size: 0.875rem;
    color: var(--text-color);
    background: white;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.rdns-diagram-forward .rdns-diagram-arrow svg {
    color: var(--primary-500);
}

.rdns-diagram-reverse .rdns-diagram-arrow svg {
    color: #16a34a;
}

.rdns-diagram-divider {
    height: 1px;
    background: var(--primary-100);
    margin: 4px 0;
}

.rdns-diagram-footer {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

.rdns-diagram-footer code {
    background: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* Use Cases */

.rdns-use-cases {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.rdns-use-case {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.rdns-use-case-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.rdns-icon-email {
    background: var(--primary-50);
    color: var(--primary-500);
}

.rdns-icon-server {
    background: rgb(229, 246, 253);
    color: rgb(1, 67, 97);
}

.rdns-icon-security {
    background: #dcfce7;
    color: #16a34a;
}

.rdns-use-case-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 6px;
}

.rdns-use-case-body {
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin: 0;
}

/* Config Steps */

.rdns-config-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.rdns-config-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--text-muted);
}

.rdns-config-step code {
    background: var(--gray-100);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--primary-500);
}

.rdns-config-step-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-500);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

/* Verification Card */

.rdns-verify-card {
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    border-radius: 12px;
    padding: 24px;
    align-self: start;
}

.rdns-verify-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 8px;
}

.rdns-verify-header svg {
    color: var(--primary-500);
    flex-shrink: 0;
}

.rdns-verify-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0 0 20px;
}

.rdns-verify-check {
    margin-bottom: 16px;
}

.rdns-verify-check-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}

.rdns-verify-terminal {
    background: #1e1e1e;
    border-radius: 6px;
    padding: 10px 12px;
    font-family: monospace;
    font-size: 0.8rem;
    color: #d4d4d4;
    line-height: 1.6;
}

.rdns-terminal-prompt {
    color: #6a9955;
    margin-right: 6px;
    user-select: none;
}

.rdns-terminal-output {
    margin-top: 4px;
    padding-left: 16px;
}

.rdns-output-success {
    color: #4ec9b0;
}

.rdns-verify-note {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 5px;
}

.rdns-verify-result {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 4px;
}

.rdns-verify-pass {
    background: #dcfce7;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.rdns-verify-pass svg {
    flex-shrink: 0;
}

/* ── API Section (primary-50 tint) ──────────────────────── */

.rdns-api-section {
    background: var(--primary-50);
    padding: 72px 0;
}

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

.rdns-api-header {
    text-align: center;
    margin-bottom: 48px;
}

.rdns-api-heading {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 12px;
}

.rdns-api-subheading {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.rdns-endpoint-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.rdns-endpoint-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.rdns-method-badge {
    background: #dcfce7;
    color: #16a34a;
    border: 1px solid #bbf7d0;
    font-family: monospace;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 6px;
}

.rdns-endpoint-url {
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-color);
    word-break: break-all;
}

.rdns-endpoint-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0 0 20px;
}

.rdns-endpoint-description code {
    background: var(--gray-100);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--primary-500);
}

.rdns-api-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 800px) {
    .rdns-api-columns {
        grid-template-columns: 1fr;
    }
}

.rdns-api-subhead {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 10px;
}

.rdns-response-block {
    background: #1e1e1e;
    border-radius: 8px;
    padding: 14px;
    margin: 0;
    overflow-x: auto;
}

.rdns-response-block code {
    font-size: 0.825rem;
}

/* Code Tabs */

.rdns-code-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.rdns-code-tab {
    padding: 5px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: white;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.rdns-code-tab.active {
    background: var(--primary-500);
    color: #fff;
    border-color: var(--primary-500);
}

.rdns-code-panel {
    display: none;
}

.rdns-code-panel.active {
    display: block;
}

.rdns-code-panel pre {
    background: #1e1e1e;
    border-radius: 8px;
    padding: 14px;
    margin: 0;
    overflow-x: auto;
}

.rdns-code-panel pre code {
    font-size: 0.825rem;
}

/* Fields Reference */

.rdns-fields-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.rdns-fields-heading {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 16px;
}

.rdns-fields-grid {
    display: flex;
    flex-direction: column;
}

.rdns-field-row {
    display: grid;
    grid-template-columns: 1.8fr 1.2fr 3fr;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    align-items: start;
}

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

.rdns-field-header {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.rdns-field-row code {
    font-family: monospace;
    color: var(--primary-500);
}

.rdns-field-type {
    color: var(--text-muted);
    font-family: monospace;
    font-size: 0.8rem;
}

@media (max-width: 600px) {
    .rdns-field-row {
        grid-template-columns: 1fr;
    }
}

/* ── FAQ (white) ─────────────────────────────────────────── */

.rdns-faq-section {
    background: white;
    padding: 72px 0;
}

.rdns-faq-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.rdns-faq-heading {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
    margin: 0 0 48px;
}

.rdns-faq-list {
    display: flex;
    flex-direction: column;
}

.rdns-faq-item {
    border-bottom: 1px solid var(--border-color);
}

.rdns-faq-item:first-child {
    border-top: 1px solid var(--border-color);
}

.rdns-faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 18px 0;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
}

.rdns-faq-chevron {
    flex-shrink: 0;
    transition: transform 0.2s;
    color: var(--text-muted);
}

.rdns-faq-item.open .rdns-faq-chevron {
    transform: rotate(180deg);
}

.rdns-faq-answer {
    display: none;
    padding: 0 0 18px;
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--text-muted);
}

.rdns-faq-item.open .rdns-faq-answer {
    display: block;
}

.rdns-faq-answer p {
    margin: 0 0 12px;
}

.rdns-faq-answer p:last-child {
    margin: 0;
}

.rdns-faq-answer ul {
    margin: 8px 0 12px 20px;
}

.rdns-faq-answer li {
    margin-bottom: 6px;
}

.rdns-faq-answer code {
    background: var(--gray-100);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--primary-500);
}