:root {
    --bg: #e4e2ed;
    --surface: #ffffff;
    --text: #1d1d2b;
    --muted: #5f5f73;
    --border: #d3d3d3;
    --primary: #101088;
    --primary-text: #ffffff;
    --success-bg: #e6f4ea;
    --success-border: #1e7e34;
    --error-bg: #fdecea;
    --error-border: #b3261e;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
}

.test-mode-banner {
    padding: 8px 16px;
    background: #b3261e;
    color: #ffffff;
    font-weight: 700;
    text-align: center;
}

.topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    background: var(--primary);
    color: var(--primary-text);
}

.brand { font-weight: 700; }

.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }

.nav a, .link-button {
    color: var(--primary-text);
    text-decoration: none;
    font: inherit;
}

.nav a:hover, .link-button:hover { text-decoration: underline; }

.link-button { background: none; border: 0; padding: 0; cursor: pointer; }

.inline { display: inline; margin: 0; }

.container { max-width: 960px; margin: 32px auto; padding: 0 16px; }

.card {
    background: var(--surface);
    border-radius: 10px;
    padding: 24px;
    box-shadow: 0 1px 3px rgb(0 0 0 / 0.08);
}

.card.narrow { max-width: 420px; margin: 0 auto; }

.card-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }

h1 { font-size: 1.4rem; margin: 0 0 16px; }

.field { display: flex; flex-direction: column; gap: 6px; margin: 16px 0; }

label { font-weight: 600; }

input[type="text"], input[type="password"], input:not([type]), textarea, input[type="file"] {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font: inherit;
    background: #fff;
}

textarea { resize: vertical; }

.modes { border: 1px solid var(--border); border-radius: 5px; padding: 8px 12px; display: flex; flex-wrap: wrap; gap: 16px; }

.modes label { font-weight: 400; display: flex; align-items: center; gap: 6px; }

.hint { color: var(--muted); }

.muted { color: var(--muted); }

.btn {
    display: inline-block;
    border: 0;
    border-radius: 10px;
    padding: 6px 16px;
    font: inherit;
    font-weight: 600;
    background-color: var(--primary);
    color: var(--primary-text);
    text-decoration: none;
    cursor: pointer;
}

.btn:disabled { opacity: 0.6; cursor: progress; }

.alert { border-left: 4px solid; border-radius: 5px; padding: 10px 14px; margin: 0 0 16px; }

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

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

.alert.error ul { margin: 0; padding-left: 18px; }

/* La tag helper deja el contenedor vacío cuando no hay errores */
.validation-summary-valid { display: none; }

.url { word-break: break-all; }

.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }

th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); vertical-align: top; }

td.num { white-space: nowrap; }

.progress { color: var(--muted); }

/* Cambio de modo sin JavaScript */
.upload-form:has(#mode-youtube:checked) .only-file { display: none; }

.upload-form:not(:has(#mode-youtube:checked)) .only-youtube { display: none; }