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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252540;
    --accent: #00d4ff;
    --accent-dim: #0099bb;
    --text-primary: #f0f0f0;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --success: #10b981;
    --success-bg: #064e3b;
    --warning: #f59e0b;
    --warning-bg: #78350f;
    --error: #ef4444;
    --error-bg: #7f1d1d;
    --dnssec: #8b5cf6;
    --dnssec-bg: #4c1d95;
    --border: #374151;
    --radius: 8px;
    --radius-sm: 4px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.header .endpoint code {
    font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
    font-size: 0.875rem;
    color: var(--accent);
    background: var(--bg-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

/* Query Form */
.query-form {
    margin-bottom: 1.5rem;
}

.input-row {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-secondary);
    padding: 0.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.input-row input[type="text"] {
    flex: 1;
    min-width: 0;
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    outline: none;
}

.input-row input[type="text"]:focus {
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.input-row input[type="text"]::placeholder {
    color: var(--text-muted);
}

.input-row select {
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
}

.input-row select:focus {
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.input-row button {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: var(--bg-primary);
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    white-space: nowrap;
}

.input-row button:hover {
    background: var(--accent-dim);
}

.input-row button:active {
    transform: scale(0.98);
}

/* Status Messages */
.status {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    display: none;
}

.status.loading {
    display: block;
    background: var(--bg-secondary);
    color: var(--accent);
    border: 1px solid var(--border);
}

.status.error {
    display: block;
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid var(--error);
}

/* Results Container */
.results {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

.results.hidden {
    display: none;
}

/* Result Summary */
.result-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.result-query {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.query-type {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg-primary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.query-name {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.9375rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Badges */
.result-badges {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.badge {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

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

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

.badge.error {
    background: var(--error-bg);
    color: var(--error);
}

.badge.dnssec-valid {
    background: linear-gradient(135deg, #0d9488, #0891b2);
    color: #fff;
    text-shadow: 0 1px 1px rgba(0,0,0,0.2);
}

.badge.dnssec-valid::before {
    content: "\2713\0020";
}

.badge.dnssec-missing {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge.dnssec-missing::before {
    content: "\26A0\0020";
}

.badge.auth {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

/* Timing Info */
.result-timing {
    display: flex;
    gap: 1.5rem;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.timing-item {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.timing-item strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* Answers Section */
.result-answers {
    padding: 1rem 1.25rem;
}

.result-answers h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-answers h3 .count {
    font-size: 0.6875rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
}

.no-answers {
    color: var(--text-muted);
    font-size: 0.875rem;
    padding: 0.5rem 0;
}

/* Answer Cards */
.answer-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
}

.answer-card:last-child {
    margin-bottom: 0;
}

.answer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.375rem;
}

.answer-type {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg-primary);
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
}

.answer-ttl {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.answer-data {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.9375rem;
    color: var(--text-primary);
    word-break: break-all;
}

.answer-name {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Raw JSON Collapsible */
.raw-json {
    border-top: 1px solid var(--border);
}

.raw-json summary {
    padding: 0.75rem 1.25rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    transition: background 0.15s;
}

.raw-json summary:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.raw-json summary::-webkit-details-marker {
    margin-right: 0.5rem;
}

.raw-json pre {
    margin: 0;
    padding: 1rem 1.25rem;
    background: var(--bg-primary);
    font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
    font-size: 0.75rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-secondary);
    max-height: 400px;
    overflow-y: auto;
}

/* Error Display */
.error-details {
    padding: 1.25rem;
}

.error-details p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.error-details pre {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.75rem;
    color: var(--error);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

/* History Section */
.history {
    margin-top: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

.history.hidden {
    display: none;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.history-header h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin: 0;
}

.clear-btn {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.25rem 0.625rem;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.clear-btn:hover {
    color: var(--error);
    border-color: var(--error);
}

#history-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.15s;
}

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

.history-item:hover {
    background: var(--bg-tertiary);
}

.history-query {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.history-type {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg-primary);
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    flex-shrink: 0;
}

.history-domain {
    font-family: "SF Mono", Monaco, monospace;
    font-size: 0.8125rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-dnssec {
    font-size: 0.75rem;
    flex-shrink: 0;
}

.history-dnssec.valid::after {
    content: "\2713";
    color: #0d9488;
}

.history-dnssec.missing::after {
    content: "\26A0";
    color: var(--warning);
    font-size: 0.625rem;
}

.history-meta {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-shrink: 0;
}

.history-meta .badge {
    font-size: 0.5625rem;
    padding: 0.125rem 0.375rem;
}

.history-time {
    font-size: 0.6875rem;
    color: var(--text-muted);
    min-width: 3.5rem;
    text-align: right;
}

/* Footer */
.footer {
    margin-top: 2rem;
    text-align: center;
}

.footer p {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .input-row {
        flex-wrap: wrap;
    }

    .input-row input[type="text"] {
        width: 100%;
    }

    .input-row select,
    .input-row button {
        flex: 1;
    }

    .result-summary {
        flex-direction: column;
        align-items: flex-start;
    }

    .result-timing {
        flex-wrap: wrap;
        gap: 0.75rem 1.5rem;
    }
}