:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --text: #172033;
    --muted: #687386;
    --border: #e3e8ef;
    --accent: #4355db;
    --accent-dark: #3344c5;
    --danger: #b42318;
    --success: #067647;
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

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

a {
    color: inherit;
}

.lessonium-topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.lessonium-topbar-main {
    max-width: 1440px;
    margin: 0 auto;
    padding: 18px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.lessonium-brand {
    font-weight: 800;
    font-size: 22px;
    text-decoration: none;
}

.lessonium-brand small {
    display: block;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .1em;
    margin-bottom: 2px;
}

.lessonium-user {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--muted);
    font-size: 14px;
}

.lessonium-user strong {
    color: var(--text);
}

.lessonium-nav {
    border-top: 1px solid var(--border);
}

.lessonium-nav-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 28px;
    display: flex;
    align-items: center;
    gap: 4px;
    overflow: visible;
}

.lessonium-nav a {
    padding: 13px 15px;
    text-decoration: none;
    font-size: 14px;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
}

.lessonium-nav a:hover,
.lessonium-nav a.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.lessonium-main {
    max-width: 1440px;
    margin: 0 auto;
    padding: 30px 28px 60px;
}

.lessonium-page-header {
    margin-bottom: 24px;
}

.lessonium-page-header h1 {
    margin: 0 0 6px;
    font-size: 30px;
}

.lessonium-page-header p {
    margin: 0;
    color: var(--muted);
}

.lessonium-grid {
    display: grid;
    grid-template-columns:
        repeat(
            4,
            minmax(0, 1fr)
        );
    gap: 18px;
}

.lessonium-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
}

.lessonium-stat-label {
    color: var(--muted);
    font-size: 13px;
}

.lessonium-stat-value {
    margin-top: 8px;
    font-size: 34px;
    font-weight: 800;
}

.lessonium-section {
    margin-top: 24px;
}

.lessonium-section h2 {
    margin-top: 0;
}

.lessonium-btn {
    appearance: none;
    border: 0;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    padding: 10px 15px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.lessonium-btn:hover {
    background: var(--accent-dark);
}

.lessonium-btn-secondary {
    background: #eef1f6;
    color: var(--text);
}

.lessonium-flash {
    margin-bottom: 20px;
    padding: 13px 15px;
    border-radius: 10px;
}

.lessonium-flash-error {
    background: #fef3f2;
    color: var(--danger);
}

.lessonium-flash-success {
    background: #ecfdf3;
    color: var(--success);
}

.lessonium-login-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 30px;
}

.lessonium-login {
    width: 100%;
    max-width: 460px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 32px;
}

.lessonium-login h1 {
    margin: 0 0 6px;
}

.lessonium-login-sub {
    color: var(--muted);
    margin: 0 0 26px;
}

.lessonium-field {
    margin-bottom: 18px;
}

.lessonium-field label {
    display: block;
    font-weight: 700;
    margin-bottom: 7px;
    font-size: 14px;
}

.lessonium-field input {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font: inherit;
}

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

.lessonium-role {
    padding: 4px 8px;
    border-radius: 999px;
    background: #eef1f6;
    color: var(--text);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.lessonium-footer {
    color: var(--muted);
    text-align: center;
    padding: 30px;
    font-size: 13px;
}

@media (max-width: 1000px) {
    .lessonium-grid {
        grid-template-columns:
            repeat(
                2,
                minmax(0, 1fr)
            );
    }
}

@media (max-width: 640px) {

    .lessonium-grid {
        grid-template-columns: 1fr;
    }

    .lessonium-main,
    .lessonium-topbar-main,
    .lessonium-nav-inner {
        padding-left: 18px;
        padding-right: 18px;
    }

    .lessonium-topbar-main {
        align-items: flex-start;
    }

    .lessonium-user {
        text-align: right;
        align-items: flex-end;
        flex-direction: column;
        gap: 5px;
    }
}


/* ============================================================
   Lessonium active organisation / workspace selector
   ============================================================ */

.lessonium-workspace-switcher {
    display:flex;
    align-items:center;
    margin-left:auto;
    margin-right:22px;
}

.lessonium-org-switch-form {
    display:flex;
    align-items:center;
    gap:9px;
    margin:0;
}

.lessonium-org-switch-label {
    font-size:11px;
    font-weight:800;
    text-transform:uppercase;
    letter-spacing:.06em;
    opacity:.68;
}

.lessonium-org-switch-select {
    min-width:220px;
    max-width:320px;
    border:1px solid rgba(255,255,255,.22);
    border-radius:9px;
    padding:8px 34px 8px 10px;
    background:rgba(255,255,255,.08);
    color:inherit;
    font:inherit;
    font-weight:700;
    cursor:pointer;
}

.lessonium-org-switch-select option {
    color:#172033;
    background:#fff;
}

.lessonium-current-workspace {
    display:flex;
    flex-direction:column;
    line-height:1.15;
}

.lessonium-current-workspace span {
    font-size:10px;
    font-weight:800;
    text-transform:uppercase;
    letter-spacing:.06em;
    opacity:.62;
}

.lessonium-current-workspace strong {
    font-size:13px;
}


@media(max-width:900px) {

    .lessonium-topbar-main {
        flex-wrap:wrap;
    }

    .lessonium-workspace-switcher {
        order:3;
        width:100%;
        margin:10px 0 0;
    }

    .lessonium-org-switch-form {
        width:100%;
    }

    .lessonium-org-switch-select {
        width:100%;
        max-width:none;
    }
}


/* ============================================================
   Trainer grouped navigation
   ============================================================ */

.lessonium-nav-group {
    position:relative;
    align-self:stretch;
    display:flex;
    align-items:stretch;
}

.lessonium-nav-group > button {
    appearance:none;
    border:0;
    border-bottom:3px solid transparent;
    background:transparent;
    color:var(--text);
    padding:13px 15px;
    font:inherit;
    font-size:14px;
    cursor:pointer;
    white-space:nowrap;
    display:flex;
    gap:6px;
    align-items:center;
}

.lessonium-nav-group:hover > button,
.lessonium-nav-group:focus-within > button,
.lessonium-nav-group.active > button {
    color:var(--accent);
    border-bottom-color:var(--accent);
}

.lessonium-nav-menu {
    position:absolute;
    z-index:1000;
    top:100%;
    left:0;
    min-width:230px;
    display:none;
    padding:7px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:0 0 12px 12px;
    box-shadow:0 12px 28px rgba(23,32,51,.12);
}

.lessonium-nav-group:hover .lessonium-nav-menu,
.lessonium-nav-group:focus-within .lessonium-nav-menu {
    display:block;
}

.lessonium-nav-menu a {
    display:block;
    border:0 !important;
    border-radius:8px;
    padding:10px 12px;
}

.lessonium-nav-menu a:hover {
    background:#f3f5fb;
}

.lessonium-nav-badge {
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-width:20px;
    height:20px;
    padding:0 5px;
    border-radius:999px;
    background:#e34b4b;
    color:#fff;
    font-size:10px;
    font-weight:900;
}


@media(max-width:700px) {

    .lessonium-nav-menu {
        position:fixed;
        top:auto;
    }
}


/* ============================================================
   Trainer grouped navigation — explicit click state
   ============================================================ */

.lessonium-nav-group.open
.lessonium-nav-menu {
    display:block;
}

.lessonium-nav-group > button::after {
    content:"▾";
    margin-left:3px;
    font-size:10px;
    opacity:.65;
    transition:transform .15s ease;
}

.lessonium-nav-group.open > button::after {
    transform:rotate(180deg);
}

.lessonium-nav-group.open > button {
    color:var(--accent);
    border-bottom-color:var(--accent);
}


/*
 * Dropdown items should remain easy to read.
 */

.lessonium-nav-menu a,
.lessonium-nav-menu a:visited {
    color:var(--text);
}

.lessonium-nav-menu a:hover,
.lessonium-nav-menu a:focus {
    color:var(--accent);
    background:#f3f5fb;
}


/* ============================================================
   Lessonium grouped navigation dropdown visibility
   ============================================================ */

.lessonium-topbar {
    position:relative;
    z-index:100;
    overflow:visible;
}

.lessonium-nav {
    position:relative;
    overflow:visible;
}

.lessonium-nav-inner {
    overflow:visible;
}

.lessonium-nav-group {
    z-index:110;
}

.lessonium-nav-group.open {
    z-index:120;
}

.lessonium-nav-menu {
    z-index:1000;
}


/*
 * On smaller screens allow the trainer navigation to wrap
 * instead of turning the bar into an overflow container that
 * clips dropdown menus.
 */

@media(max-width:900px) {

    .lessonium-nav-inner {
        flex-wrap:wrap;
        overflow:visible;
    }

    .lessonium-nav-group {
        position:relative;
    }

    .lessonium-nav-menu {
        position:absolute;
        top:100%;
        left:0;
        min-width:220px;
    }
}