/* ---------- Palety ---------- */
:root {
    --bg: #f8f9fa;
    --fg: #111;
    --card-bg: #fff;
    --card-border: rgba(16,24,40,.08);
    --muted: #6c757d;
    --shadow: 0 2px 16px rgba(16,24,40,.08);
}
/* explicit dark */
:root[data-theme="dark"] {
    --bg: #0b0e12;
    --fg: #e6e7ea;
    --card-bg: #131821;
    --card-border: #273043;
    --muted: #9aa3b2;
    --shadow: 0 2px 16px rgba(0,0,0,.35);
}
/* explicit sepia (jemná) */
    :root[data-theme="sepia"] {
        --bg: #cec379;
        --fg: #2a211c;
        --card-bg: #cec379;
        --card-border: #cbc9c6;
        --muted: #7c6b5f;
        --shadow: 0 2px 16px rgba(70,50,20,.12);
    }
/* auto: rešpektuj systémový dark */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg: #0b0e12;
        --fg: #e6e7ea;
        --card-bg: #131821;
        --card-border: #273043;
        --muted: #9aa3b2;
        --shadow: 0 2px 16px rgba(0,0,0,.35);
    }
}

/* ---------- Layout ---------- */
html, body {
    height: 100%;
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px;
}

.head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 8px 0 12px;
}

    .head img {
        height: 36px;
        object-fit: contain;
    }

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 8px;
    outline: 1px solid var(--card-border);
}

.frame {
    display: grid;
    grid-template-rows: 1fr;
    min-height: 760px;
    width: 100%;
}

    .frame iframe {
        position: relative;
        border: 0;
        width: 100%;
        height: 100%;
        background: transparent;
    }

.muted {
    color: var(--muted);
    font-size: .9rem;
    margin-top: 8px;
}

h1 {
    font-size: 1.125rem;
    margin: 0;
}