:root {
    color-scheme: light;
    --ink: #17332f;
    --muted: #61716d;
    --line: #c8d8d3;
    --paper: #ffffff;
    --canvas: #f4f7f5;
    --brand: #075e54;
    --brand-dark: #06463f;
    --mint: #dff3ed;
    --mint-strong: #bfe5da;
    --gold: #f3c969;
    --gold-soft: #fff5cf;
    --danger: #a33a32;
    --danger-soft: #fff0ee;
    --success: #167052;
    --shadow: 0 18px 50px rgba(23, 51, 47, .11);
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--canvas); }

body.course-page {
    min-height: 100vh;
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(191, 229, 218, .72), transparent 34rem),
        linear-gradient(180deg, #f8fbf9 0, var(--canvas) 22rem);
    font-family: Calibri, "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.45;
}
body.modal-open { overflow: hidden; }

a { color: #066a60; }
a:hover { color: var(--brand-dark); }

.course-shell { width: min(1500px, calc(100% - 32px)); margin: 0 auto; padding: 24px 0 48px; }
.course-shell--narrow { width: min(1040px, calc(100% - 32px)); }

.course-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 22px;
    border: 1px solid rgba(7, 94, 84, .18);
    border-radius: 16px;
    background: rgba(255, 255, 255, .92);
    box-shadow: 0 8px 30px rgba(23, 51, 47, .08);
}

.course-brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.course-mark {
    display: grid;
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    place-items: center;
    border-radius: 12px;
    color: #fff;
    background: var(--brand);
    font-size: 15px;
    font-weight: 800;
    letter-spacing: .04em;
}
.course-kicker { margin: 0 0 2px; color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.course-title { margin: 0; font-size: clamp(20px, 2.4vw, 30px); line-height: 1.1; }
.course-subtitle { margin: 5px 0 0; color: var(--muted); font-size: 14px; }

.course-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.course-nav a, .button-link, button {
    min-height: 38px;
    border: 1px solid var(--brand);
    border-radius: 8px;
    padding: 8px 13px;
    color: var(--brand-dark);
    background: #fff;
    font: inherit;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
}
.course-nav a:hover, .button-link:hover, button:hover { background: var(--mint); }
.course-nav a.is-active { color: #fff; background: var(--brand); }
.course-nav a.is-active:hover { background: var(--brand-dark); }
button.primary, .button-link.primary { color: #fff; background: var(--brand); }
button.primary:hover, .button-link.primary:hover { background: var(--brand-dark); }
button.danger { border-color: var(--danger); color: var(--danger); background: #fff; }
button.danger:hover { color: #fff; background: var(--danger); }
button:disabled { cursor: wait; opacity: .62; }

.panel {
    margin-top: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--paper);
    box-shadow: 0 8px 28px rgba(23, 51, 47, .06);
}
.panel-body { padding: 20px; }
.panel-title { margin: 0 0 6px; font-size: 19px; }
.muted { color: var(--muted); }
.error-text { color: var(--danger); }

.login-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(290px, .78fr); gap: 22px; margin-top: 26px; align-items: start; }
.login-card { overflow: hidden; box-shadow: var(--shadow); }
.login-card__heading { padding: 21px 24px; color: #fff; background: var(--brand); }
.login-card__heading h2 { margin: 0; font-size: 23px; }
.login-card__heading p { margin: 6px 0 0; color: rgba(255, 255, 255, .82); }
.login-card form { padding: 24px; }
.field { display: grid; gap: 7px; margin-bottom: 17px; }
.field label { font-weight: 750; }
.field input, .filter-control {
    width: 100%;
    min-height: 44px;
    border: 1px solid #9fb7b0;
    border-radius: 8px;
    padding: 9px 11px;
    color: var(--ink);
    background: #fff;
    font: inherit;
}
.field input:focus, .filter-control:focus { outline: 3px solid rgba(7, 94, 84, .16); border-color: var(--brand); }
.login-submit { width: 100%; min-height: 46px; }
.alert { margin: 0 24px 0; border: 1px solid #e9a9a3; border-radius: 8px; padding: 10px 12px; color: var(--danger); background: var(--danger-soft); }

.platform-list { display: grid; gap: 10px; margin-top: 15px; }
.platform-link {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr) auto;
    gap: 11px;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 11px;
    color: var(--ink);
    background: #fff;
    text-decoration: none;
}
.platform-link:hover { border-color: var(--brand); background: var(--mint); }
.platform-icon { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 9px; color: #fff; background: var(--brand); font-weight: 800; }
.platform-link strong, .platform-link small { display: block; }
.platform-link small { color: var(--muted); }
.platform-arrow { color: var(--brand); font-size: 20px; }
.credential-note { margin-top: 14px; border-left: 4px solid var(--gold); padding: 10px 12px; background: var(--gold-soft); font-size: 14px; }

.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(130px, 1fr)); gap: 12px; margin-top: 18px; }
.stats-grid--three { grid-template-columns: repeat(3, minmax(130px, 1fr)); }
.stat-card { border: 1px solid var(--line); border-radius: 11px; padding: 14px 16px; background: var(--paper); }
.stat-card strong { display: block; font-size: 27px; line-height: 1; }
.stat-card span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; font-weight: 700; }

.toolbar { display: grid; grid-template-columns: minmax(220px, 1fr) repeat(2, minmax(150px, .35fr)) auto auto; gap: 10px; align-items: end; }
.toolbar label { display: grid; gap: 5px; color: var(--muted); font-size: 13px; font-weight: 750; }
.filter-control { min-height: 40px; padding: 7px 9px; }
.result-count { align-self: center; color: var(--muted); font-size: 14px; white-space: nowrap; }

.analytics-heading { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; }
.analytics-heading p { margin: 5px 0 0; }
.analytics-summary { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.analytics-summary span { border-radius: 999px; padding: 5px 9px; color: var(--muted); background: var(--canvas); font-size: 12px; }
.analytics-summary strong { color: var(--ink); }
.progress-disclosure { overflow: hidden; }
.progress-disclosure__summary { display: flex; justify-content: space-between; gap: 18px; align-items: center; padding: 17px 20px; cursor: pointer; list-style: none; }
.progress-disclosure__summary::-webkit-details-marker { display: none; }
.progress-disclosure__summary::marker { content: ""; }
.progress-disclosure__summary:hover { background: #f7faf8; }
.progress-disclosure__summary:focus-visible { outline: 3px solid rgba(23, 112, 96, .25); outline-offset: -3px; }
.progress-disclosure__title strong, .progress-disclosure__title small { display: block; }
.progress-disclosure__title strong { font-size: 18px; }
.progress-disclosure__title small { margin-top: 4px; color: var(--muted); font-size: 13px; font-weight: 650; }
.progress-disclosure__action { flex: 0 0 auto; color: var(--brand); font-size: 13px; font-weight: 800; }
.progress-disclosure__action::after { content: "\25BE"; display: inline-block; margin-left: 7px; transition: transform .16s ease; }
.progress-disclosure__hide { display: none; }
.progress-disclosure[open] .progress-disclosure__summary { border-bottom: 1px solid var(--line); }
.progress-disclosure[open] .progress-disclosure__show { display: none; }
.progress-disclosure[open] .progress-disclosure__hide { display: inline; }
.progress-disclosure[open] .progress-disclosure__action::after { transform: rotate(180deg); }
.progress-disclosure__body { padding-top: 16px; }
.assignment-progress-list { display: grid; gap: 1px; margin-top: 17px; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--line); }
.assignment-progress-row { display: grid; grid-template-columns: minmax(210px, 1.25fr) minmax(150px, 1fr) minmax(105px, .42fr) minmax(165px, .65fr); gap: 14px; align-items: center; padding: 10px 12px; background: #fff; }
.assignment-progress-name strong, .assignment-progress-name span { display: block; }
.assignment-progress-name span, .assignment-progress-metrics span { color: var(--muted); font-size: 12px; }
.progress-track { height: 9px; overflow: hidden; border-radius: 999px; background: #dfe9e6; }
.progress-track span { display: block; height: 100%; border-radius: inherit; background: var(--brand); }
.assignment-progress-metrics strong, .assignment-progress-metrics span { display: block; }
.table-wrap--compact { max-height: 360px; margin-top: 16px; }
.failed-work-table { width: 100%; min-width: 850px; border-collapse: collapse; font-size: 13px; }
.failed-work-table th, .failed-work-table td { border-bottom: 1px solid var(--line); padding: 9px 10px; text-align: left; vertical-align: top; }
.failed-work-table th { position: sticky; top: 0; z-index: 1; color: var(--brand-dark); background: #eaf5f1; }
.failed-work-table tr:last-child td { border-bottom: 0; }
.failed-work-table td span { display: block; color: var(--muted); font-size: 12px; }
.status-banner { display: flex; justify-content: space-between; gap: 14px; margin-top: 18px; border: 1px solid var(--line); border-left-width: 5px; border-radius: 10px; padding: 11px 14px; background: #fff; }
.status-banner span { color: var(--muted); }
.status-banner--healthy, .status-card--healthy { border-left-color: var(--success); }
.status-banner--warning, .status-card--warning { border-left-color: #c18a05; background: var(--gold-soft); }
.status-banner--critical, .status-card--critical { border-left-color: var(--danger); background: var(--danger-soft); }
.status-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.status-columns .panel { min-width: 0; }
.health-list { display: grid; gap: 1px; margin-top: 13px; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; background: var(--line); }
.health-list > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 14px; align-items: center; padding: 10px 11px; background: #fff; }
.health-list small { grid-column: 1 / -1; color: var(--muted); }
.certificate-monitor { margin-top: 16px; }
.certificate-monitor .panel-heading { align-items: center; }
.certificate-monitor .panel-note { margin: 8px 0 0; color: var(--muted); }
.certificate-health-list > div { grid-template-columns: minmax(0, 1fr) auto; }
.certificate-advice { margin-top: 13px; }
.health-pill { border-radius: 999px; padding: 3px 8px; font-size: 12px; text-transform: capitalize; }
.health-pill--healthy { color: #095c43; background: #d8f3e8; }
.health-pill--warning { color: #755200; background: #fff0b8; }
.health-pill--critical { color: #8f2923; background: #ffe1de; }

.table-wrap { max-height: calc(100vh - 270px); overflow: auto; border: 1px solid var(--line); border-radius: 10px; }
.grade-table { width: 100%; min-width: 1240px; border-collapse: separate; border-spacing: 0; font-size: 13px; }
.grade-table.account-table { min-width: 820px; }
.grade-table.account-table th:nth-child(2), .grade-table.account-table td:nth-child(2) { width: 150px; }
.grade-table.account-table th:nth-child(3), .grade-table.account-table td:nth-child(3) { width: 270px; }
.grade-table th, .grade-table td { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 7px 8px; vertical-align: top; }
.grade-table th { position: sticky; top: 0; z-index: 3; color: var(--brand-dark); background: #eaf5f1; text-align: left; }
.grade-table thead tr:first-child th { top: 0; background: var(--mint-strong); text-align: center; }
.grade-table thead tr:nth-child(2) th { top: 33px; }
.grade-table tbody tr:nth-child(even) td { background: #f4faf7; }
.grade-table tbody tr:hover td { background: var(--gold-soft); }
.grade-table tr:last-child td { border-bottom: 0; }
.grade-table th:last-child, .grade-table td:last-child { border-right: 0; }
.grade-table .sticky-student { position: sticky; left: 0; z-index: 2; min-width: 190px; max-width: 220px; background: #fff; }
.grade-table tbody tr:nth-child(even) .sticky-student { background: #f4faf7; }
.grade-table tbody tr:hover .sticky-student { background: var(--gold-soft); }
.grade-table thead .sticky-student { z-index: 5; background: var(--mint-strong); }
.student-name { font-size: 14px; font-weight: 800; }
.student-meta { margin-top: 3px; color: var(--muted); font-size: 12px; }
.badge { display: inline-block; border-radius: 999px; padding: 2px 7px; font-size: 11px; font-weight: 800; text-transform: capitalize; }
.badge--active, .badge--completed { color: #095c43; background: #d8f3e8; }
.badge--suspended, .badge--failed { color: #8f2923; background: #ffe1de; }
.badge--queued, .badge--running, .badge--snapshotting { color: #755200; background: #fff0b8; }
.score-value { display: block; color: var(--brand-dark); font-size: 14px; font-weight: 800; white-space: nowrap; }
.score-raw { display: block; margin-top: 2px; color: var(--muted); font-size: 11px; white-space: nowrap; }
.credential-status { display: block; max-width: 160px; margin-top: 4px; font-size: 11px; }
.copy-credentials { min-height: 32px; padding: 6px 9px; font-size: 12px; white-space: nowrap; }
.credential-dialog {
    position: fixed;
    z-index: 100;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgb(4 31 24 / 72%);
}
.credential-dialog[hidden] { display: none; }
.credential-dialog__panel {
    width: min(680px, 100%);
    max-height: calc(100vh - 40px);
    overflow: auto;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 20px;
    background: var(--paper);
    box-shadow: 0 24px 70px rgb(0 0 0 / 28%);
}
.credential-dialog__label { display: block; margin: 16px 0 6px; font-size: 13px; font-weight: 800; }
.credential-dialog__text {
    width: 100%;
    min-height: 240px;
    resize: vertical;
    border: 1px solid var(--line);
    border-radius: 9px;
    padding: 12px;
    color: var(--ink);
    background: #f7faf8;
    font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.credential-dialog__actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px; margin-top: 12px; }
.account-actions { display: flex; flex-wrap: wrap; gap: 6px; min-width: 150px; }
.account-actions button { padding: 7px 9px; font-size: 12px; }
.account-operation-status { display: block; min-width: 170px; margin-top: 7px; font-size: 11px; line-height: 1.35; }
.onboarding-panel { width: min(980px, 100%); }
.onboarding-heading, .onboarding-progress__heading { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.onboarding-heading p { max-width: 720px; margin: 6px 0 0; }
.onboarding-close { flex: 0 0 auto; }
.onboarding-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: 18px; margin-top: 18px; align-items: stretch; }
.onboarding-form { display: flex; min-width: 0; flex-direction: column; gap: 12px; border: 1px solid var(--line); border-radius: 12px; padding: 18px; background: #f7faf8; }
.onboarding-form h3, .onboarding-progress h3 { margin: 0; }
.onboarding-form__intro { min-height: 58px; margin: 0; font-size: 13px; }
.onboarding-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.onboarding-form label { display: grid; min-width: 0; gap: 6px; color: var(--muted); font-size: 13px; font-weight: 750; }
.onboarding-field--wide { grid-column: 1 / -1; }
.onboarding-form input {
    width: 100%;
    min-width: 0;
    min-height: 42px;
    border: 1px solid #9fb7b0;
    border-radius: 8px;
    padding: 9px 11px;
    color: var(--ink);
    background: #fff;
    font: inherit;
}
.onboarding-form input:focus { outline: 3px solid rgba(7, 94, 84, .16); border-color: var(--brand); }
.onboarding-form input[type="file"] { height: auto; padding: 9px; font-size: 13px; }
.onboarding-upload { display: grid; gap: 8px; border: 1px dashed #9fb7b0; border-radius: 9px; padding: 14px; background: #fff; }
.onboarding-upload p { margin: 0; font-size: 12px; }
.onboarding-form__actions { display: flex; gap: 9px; margin-top: auto; align-items: stretch; }
.onboarding-form__actions > * { flex: 1 1 0; display: inline-grid; place-items: center; text-align: center; }
.onboarding-form__actions--stacked { flex-direction: column; }
.staff-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr); gap: 16px; }
.staff-layout .panel { min-width: 0; }
.staff-create-form { display: grid; gap: 14px; margin-top: 16px; }
.staff-create-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.staff-create-fields label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; font-weight: 750; }
.staff-create-fields input { width: 100%; min-width: 0; min-height: 42px; border: 1px solid #9fb7b0; border-radius: 8px; padding: 9px 11px; color: var(--ink); background: #fff; font: inherit; }
.staff-create-fields input:focus { outline: 3px solid rgba(7, 94, 84, .16); border-color: var(--brand); }
.staff-table { min-width: 980px; }
.staff-table td { vertical-align: middle; }
.onboarding-progress { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 16px; }
.onboarding-results { display: grid; gap: 7px; max-height: 280px; overflow: auto; margin-top: 10px; }
.onboarding-result, .onboarding-history { border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px; background: #fff; font-size: 12px; text-align: left; }
.onboarding-result--completed { border-color: #8bd1b8; background: #effaf6; }
.onboarding-result--failed { border-color: #e9a9a3; background: var(--danger-soft); }
.onboarding-result--running { border-color: #e2c36c; background: var(--gold-soft); }
.latest-cell { min-width: 180px; }
.empty-state { padding: 28px !important; color: var(--muted); text-align: center; }

.page-footer { margin-top: 18px; color: var(--muted); font-size: 12px; text-align: center; }
.feedback-output {
    max-height: 65vh;
    overflow: auto;
    margin: 16px 0 0;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 16px;
    color: var(--ink);
    background: #f7faf8;
    font: 14px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

@media (max-width: 820px) {
    .course-header { align-items: flex-start; flex-direction: column; }
    .course-nav { justify-content: flex-start; }
    .login-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, minmax(120px, 1fr)); }
    .stats-grid--three { grid-template-columns: 1fr; }
    .toolbar { grid-template-columns: 1fr; }
    .analytics-heading { flex-direction: column; }
    .analytics-summary { justify-content: flex-start; }
    .progress-disclosure__summary { align-items: flex-start; }
    .assignment-progress-row { grid-template-columns: minmax(0, 1fr) minmax(100px, .7fr); }
    .assignment-progress-row .progress-track { grid-column: 1 / -1; grid-row: 2; }
    .status-banner { flex-direction: column; }
    .status-columns { grid-template-columns: 1fr; gap: 0; }
    .staff-layout { grid-template-columns: 1fr; gap: 0; }
    .onboarding-grid { grid-template-columns: 1fr; }
    .onboarding-form__intro { min-height: 0; }
    .table-wrap { max-height: none; }
}

@media (max-width: 480px) {
    .course-shell, .course-shell--narrow { width: min(100% - 20px, 1500px); padding-top: 10px; }
    .credential-dialog { padding: 8px; }
    .credential-dialog__panel { max-height: calc(100vh - 16px); padding: 15px; }
    .onboarding-heading { align-items: flex-start; }
    .onboarding-fields { grid-template-columns: 1fr; }
    .staff-create-fields { grid-template-columns: 1fr; }
    .onboarding-field--wide { grid-column: auto; }
    .course-header, .panel-body, .login-card form { padding: 16px; }
    .course-mark { width: 42px; height: 42px; flex-basis: 42px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}