:root {
    --color-bg: #0d1117;
    --color-surface: #161b22;
    --color-surface-alt: #1f2530;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-text: #f5f7ff;
    --color-muted: #9ba7c6;
    --color-accent: #67e8f9;
    --color-positive: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #38bdf8;
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-soft: 0 20px 50px rgba(15, 23, 42, 0.6);
    --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.45);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Inter', 'SF Pro Display', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: radial-gradient(circle at top, rgba(103, 232, 249, 0.08), transparent 45%), #05070b;
    padding: 40px 16px 64px;
}

body.body-hide-200 details[data-http-status="200"] {
    display: none;
}

body.body-hide-external details[data-external="true"] {
    display: none;
}

.app {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.app__header {
    padding: 32px;
    background: linear-gradient(145deg, rgba(103, 232, 249, 0.12), rgba(14, 165, 233, 0.08));
    border: 1px solid rgba(103, 232, 249, 0.2);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.app__header h1 {
    margin: 12px 0 8px;
    font-size: 2.5rem;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    font-size: 0.75rem;
    margin: 0;
}

.lede {
    margin: 0;
    color: var(--color-muted);
    max-width: 58ch;
    line-height: 1.6;
}

.app__panel {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 24px;
    box-shadow: var(--shadow-card);
}

.app__panel--toolbar {
    padding: 16px 24px;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.field-group label {
    font-weight: 600;
    color: var(--color-muted);
}

.field-group__controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.field-group__controls input {
    flex: 1 1 320px;
    padding: 14px 18px;
    background: var(--color-surface-alt);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 1rem;
}

.field-group__controls input:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    padding: 12px 18px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.btn:active {
    transform: translateY(1px);
}

.btn--primary {
    background: var(--color-accent);
    color: #04131c;
    box-shadow: 0 10px 20px rgba(103, 232, 249, 0.3);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.feedback {
    min-height: 24px;
    margin: 0 0 12px;
    font-weight: 500;
    color: var(--color-info);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.feedback span {
    display: block;
}

.feedback-detail {
    font-weight: 400;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.feedback--success {
    color: var(--color-positive);
}

.feedback--warning {
    color: var(--color-warning);
}

.feedback--error {
    color: var(--color-error);
}

.url-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

details {
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0;
    overflow: hidden;
}

details summary {
    cursor: pointer;
    font-weight: 600;
    list-style: none;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: rgba(255, 255, 255, 0.02);
}

details summary::-webkit-details-marker {
    display: none;
}

.summary-text {
    color: var(--color-text);
}

.summary-link-count {
    font-size: 0.85rem;
    color: var(--color-muted);
}

details > div {
    padding: 10px 20px 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-muted);
    font-size: 0.95rem;
}

details[data-http-status="200"] summary {
    border-left: 4px solid var(--color-positive);
}

details[data-http-status="404"] summary {
    border-left: 4px solid var(--color-error);
}

details[data-http-status="500"] summary {
    border-left: 4px solid var(--color-warning);
}

details[data-http-status="301"] summary {
    border-left: 4px solid var(--color-info);
}

details[data-http-status="302"] summary {
    border-left: 4px solid #d946ef;
}

.queued summary {
    background: rgba(99, 102, 241, 0.15);
}

.working summary {
    background: rgba(245, 158, 11, 0.2);
    animation: blink 1s infinite;
}

.complete summary {
    background: rgba(34, 197, 94, 0.12);
}

.error summary {
    background: rgba(239, 68, 68, 0.15);
}

@keyframes blink {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.65;
    }

    100% {
        opacity: 1;
    }
}

@media (max-width: 640px) {
    .field-group__controls {
        flex-direction: column;
    }

    .button-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}