:root {
    color-scheme: light;
    --u5-lms-shell-ink: #163433;
    --u5-lms-shell-muted: #5f7170;
    --u5-lms-shell-line: #d9e5e3;
    --u5-lms-shell-bg: #f6faf9;
    --u5-lms-shell-primary: #0b6b68;
}

* { box-sizing: border-box; }

.u5-lms-standalone-page {
    min-height: 100vh;
    margin: 0;
    background: var(--u5-lms-shell-bg);
    color: var(--u5-lms-shell-ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.u5-lms-standalone-header {
    position: sticky;
    z-index: 20;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 64px;
    padding: .7rem clamp(1rem, 4vw, 3.25rem);
    border-bottom: 1px solid var(--u5-lms-shell-line);
    background: rgb(255 255 255 / 96%);
    backdrop-filter: blur(10px);
}

.u5-lms-standalone-brand,
.u5-lms-standalone-actions { display: flex; align-items: center; gap: .65rem; }

.u5-lms-standalone-header-end {
    display: grid;
    justify-items: end;
    gap: .25rem;
}

.u5-lms-standalone-brand {
    color: inherit;
    font-weight: 760;
    text-decoration: none;
}

.u5-lms-standalone-brand img { display: block; border-radius: 0; object-fit: contain; }
.u5-lms-standalone-brand small { color: var(--u5-lms-shell-muted); font-size: .78rem; font-weight: 700; letter-spacing: .04em; }

.u5-lms-standalone-link,
.u5-lms-standalone-logout {
    min-height: 38px;
    border-radius: 8px;
    padding: .48rem .72rem;
    color: var(--u5-lms-shell-primary);
    font: inherit;
    font-weight: 650;
    text-decoration: none;
}

.u5-lms-standalone-logout {
    border: 1px solid var(--u5-lms-shell-line);
    background: #fff;
    cursor: pointer;
}

.u5-lms-standalone-logout-status {
    max-width: min(360px, 72vw);
    margin: 0;
    color: #9d2921;
    font-size: .78rem;
    font-weight: 650;
    text-align: right;
}

.u5-lms-standalone-link:focus-visible,
.u5-lms-standalone-logout:focus-visible,
.u5-lms-standalone-brand:focus-visible,
.u5-lms-standalone-skip:focus-visible { outline: 3px solid #f1b81b; outline-offset: 3px; }

.u5-lms-standalone-root { min-height: calc(100vh - 64px); }

.u5-lms-standalone-loading,
.u5-lms-standalone-session {
    width: min(560px, calc(100% - 2rem));
    margin: 4rem auto;
    padding: 1.25rem;
    border: 1px solid var(--u5-lms-shell-line);
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 12px 28px rgb(22 52 51 / 8%);
}

.u5-lms-standalone-session h1 { margin: 0 0 .5rem; font-size: 1.2rem; }
.u5-lms-standalone-session p { margin: 0 0 1rem; color: var(--u5-lms-shell-muted); }

.u5-lms-standalone-session a {
    display: inline-block;
    border-radius: 8px;
    padding: .58rem .8rem;
    background: var(--u5-lms-shell-primary);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
}

.u5-lms-standalone-skip {
    position: fixed;
    z-index: 100;
    top: -100px;
    left: 1rem;
    padding: .5rem .7rem;
    border-radius: 6px;
    background: #fff;
    color: var(--u5-lms-shell-primary);
}
.u5-lms-standalone-skip:focus-visible { top: 1rem; }

@media (max-width: 620px) {
    .u5-lms-standalone-header { align-items: flex-start; min-height: 0; padding: .75rem 1rem; }
    .u5-lms-standalone-actions { align-items: flex-end; flex-direction: column; gap: .15rem; }
    .u5-lms-standalone-header-end { gap: .15rem; }
    .u5-lms-standalone-link, .u5-lms-standalone-logout { min-height: 32px; padding: .25rem .35rem; font-size: .82rem; }
    .u5-lms-standalone-logout-status { max-width: 190px; }
    .u5-lms-standalone-brand small { display: none; }
}