/* ================= ROADMAP ================= */
.roadmap-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 34px;
}

.roadmap-layout {
    display: grid;
    grid-template-columns: 216px 1fr;
    gap: 40px;
    align-items: start;
}

.roadmap-sidebar {
    position: sticky;
    top: 92px;
    display: flex;
    flex-direction: column;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-muted);
    text-decoration: none;
    font-size: .87rem;
    font-weight: 600;
    border-top: 1px solid var(--border);
}

.sidebar-link:last-child {
    border-bottom: 1px solid var(--border);
}

.sidebar-link:hover {
    color: var(--text);
}

.ring {
    --pct: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    flex: none;
    background: conic-gradient(var(--accent) calc(var(--pct)*1%), var(--bg-sunken) 0);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ring::after {
    content: "";
    width: 21px;
    height: 21px;
    border-radius: 50%;
    background: var(--bg);
}

.ring-lg {
    --pct: 0;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: conic-gradient(var(--ring-color, var(--accent)) calc(var(--pct)*1%), var(--bg-sunken) 0);
    display: flex;
    align-items: center;
    justify-content: center;
    flex: none;
}

.ring-inner {
    width: 108px;
    height: 108px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.ring-inner b {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.6rem;
}

.ring-inner span {
    font-size: .66rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
}

.topic-card {
    border: 1px solid var(--border);
    border-left: 3px solid var(--border-strong);
    margin-bottom: 16px;
    background: var(--bg);
}

.topic-card[open] {
    border-left-color: var(--accent);
    background: var(--bg-raised);
}

.topic-card>summary {
    list-style: none;
    cursor: pointer;
    padding: 20px 22px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.topic-card>summary::-webkit-details-marker {
    display: none;
}

.topic-card .chev {
    transition: transform .15s;
    color: var(--text-muted);
    flex: none;
}

.topic-card[open]>summary .chev {
    transform: rotate(90deg);
}

.topic-card .topic-title {
    flex: 1;
    min-width: 0;
}

.topic-card .topic-title h3 {
    font-size: 1.24rem;
    margin: 0 0 3px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.topic-card .topic-title p {
    margin: 0;
    font-size: .82rem;
    color: var(--text-muted);
}

.topic-progress-text {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .78rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.topic-status {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .66rem;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 2px;
    white-space: nowrap;
    border: 1px solid currentColor;
}

.topic-status.complete {
    color: var(--success);
}

.topic-status.progress {
    color: var(--gold);
}

.topic-status.notstarted {
    color: var(--text-muted);
}

.topic-body {
    border-top: 1px solid var(--border);
    padding: 4px 22px 22px;
}

.subtopic {
    margin-top: 12px;
}

.subtopic>summary {
    list-style: none;
    cursor: pointer;
    padding: 12px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: .94rem;
    border: 1px solid transparent;
    flex-wrap: wrap;
}

.subtopic>summary::-webkit-details-marker {
    display: none;
}

.subtopic[open]>summary {
    background: var(--bg);
    border-color: var(--accent);
}

.subtopic .chev {
    transition: transform .15s;
    color: var(--text-muted);
    flex: none;
}

.subtopic[open]>summary .chev {
    transform: rotate(90deg);
}

.subtopic-meta {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.subtopic-progress {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .75rem;
    color: var(--text-muted);
    flex: none;
}

.accuracy-badge {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .66rem;
    font-weight: 600;
    letter-spacing: .03em;
    padding: 2px 8px;
    border-radius: 2px;
    white-space: nowrap;
    border: 1px solid currentColor;
    flex: none;
}

.accuracy-badge.good {
    color: var(--success);
}

.accuracy-badge.mid {
    color: var(--gold);
}

.accuracy-badge.low {
    color: var(--danger);
}

.accuracy-badge.neutral {
    color: var(--text-muted);
    border-style: dashed;
}

.lesson-list {
    padding: 8px 0 4px 32px;
    border-left: 2px solid var(--border);
    margin-left: 17px;
}

.lesson-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: .92rem;
    font-family: inherit;
    color: var(--text);
}

/* Clickable affordance (meeting notes, 2026-11-03, item 4). The open topic card is
   already --bg-raised, so a raised hover was invisible there: hover lifts the row to
   paper, draws an accent bar on its left, colors the name and slides in an arrow. The
   arrow's slot is always reserved, so nothing shifts. Touch gets the :active press. */
.lesson-row {
    position: relative;
    transition: background .12s, box-shadow .12s;
}

.lesson-row::after {
    content: "";
    width: 8px;
    height: 8px;
    flex: none;
    margin: 0 4px 0 2px;
    border-top: 2px solid var(--accent);
    border-right: 2px solid var(--accent);
    transform: translateX(-4px) rotate(45deg);
    opacity: 0;
    transition: opacity .12s, transform .12s;
}

.lesson-row .lname {
    transition: color .12s;
}

@media (hover: hover) {
    .lesson-row:hover {
        background: var(--bg);
        box-shadow: inset 3px 0 0 var(--accent);
    }

    .lesson-row:hover .lname {
        color: var(--accent);
    }

    .lesson-row:hover::after {
        opacity: 1;
        transform: translateX(0) rotate(45deg);
    }

    .topic-card>summary:hover .topic-title h3,
    .subtopic>summary:hover {
        color: var(--accent);
    }

    .topic-card>summary:hover .chev,
    .subtopic>summary:hover .chev {
        color: var(--accent);
    }

    .subtopic:not([open])>summary:hover {
        border-color: var(--border-strong);
        background: var(--bg);
    }

    .sidebar-link:hover .ring {
        box-shadow: 0 0 0 2px var(--accent);
    }
}

.lesson-row:active {
    background: var(--bg-sunken);
}

.lesson-row:focus-visible,
.topic-card>summary:focus-visible,
.subtopic>summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.lesson-row:focus-visible::after {
    opacity: 1;
    transform: translateX(0) rotate(45deg);
}

.status-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    flex: none;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg);
}

.status-icon.done {
    background: var(--success);
    border: 1.5px solid var(--success);
}

.status-icon.current {
    border: 2.5px solid var(--accent);
}

.status-icon.todo {
    border: 1.5px solid var(--border-strong);
    color: var(--text-muted);
}

.lesson-row .lname {
    flex: 1;
}

.unlock-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 16px 0 6px 17px;
    padding: 16px 18px;
    border: 1px dashed var(--border-strong);
}

.unlock-row.ready {
    border: 1.5px solid var(--gold);
    background: var(--gold-soft);
}

.unlock-row .u-flag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .64rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--gold);
    flex: none;
    writing-mode: vertical-rl;
}

.unlock-row.locked-row .u-flag {
    color: var(--text-muted);
}

.unlock-row .u-text {
    flex: 1;
}

.unlock-row .u-text strong {
    display: block;
    font-size: .94rem;
    font-family: 'Public Sans', sans-serif;
    font-weight: 700;
}

.unlock-row .u-text span {
    font-size: .8rem;
    color: var(--text-muted);
}


.lesson-panel {
    display: none;
}

.lesson-panel.active {
    display: block;
}

.back-link {
    background: none;
    border: none;
    color: var(--accent);
    font-weight: 700;
    font-size: .86rem;
    cursor: pointer;
    padding: 0;
    margin-bottom: 20px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.lesson-crumb {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 10px;
}

.lesson-card {
    max-width: 700px;
}

.lesson-card h2 {
    font-size: 2.1rem;
    font-family: 'Big Shoulders Display', sans-serif;
}

.lesson-body {
    font-family: 'Public Sans', serif;
    font-size: 1.06rem;
}

.lesson-body p {
    color: var(--text);
}

.lesson-body li {
    list-style: disc;
    margin-left: 1.3em;
    margin-bottom: .4em;
}

.takeaway-box {
    background: var(--bg-raised);
    border-left: 3px solid var(--success);
    padding: 18px 20px;
    margin: 24px 0;
    font-family: 'Public Sans', sans-serif;
}

.takeaway-box strong {
    color: var(--success);
    display: block;
    margin-bottom: 8px;
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    font-family: 'IBM Plex Mono', monospace;
}

.takeaway-box li {
    font-size: .9rem;
}

.quiz-cta {
    margin-top: 32px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.quiz-cta p {
    margin: 0;
    color: var(--text-muted);
    font-size: .86rem;
    font-family: 'Public Sans', sans-serif;
}


@media (max-width: 900px) {
    .roadmap-layout {
        grid-template-columns: 1fr;
    }

    /* the subject rail becomes a swipeable strip of subject chips */
    .roadmap-sidebar {
        position: static;
        flex-direction: row;
        gap: 8px;
        overflow-x: auto;
        scroll-snap-type: x proximity;
        scrollbar-width: none;
        padding-bottom: 2px;
    }

    .roadmap-sidebar::-webkit-scrollbar {
        display: none;
    }

    .sidebar-link {
        flex: none;
        gap: 9px;
        padding: 7px 14px 7px 7px;
        border: 1px solid var(--border);
        border-radius: 999px;
        background: var(--bg);
        white-space: nowrap;
        scroll-snap-align: start;
    }

    .sidebar-link:last-child {
        border-bottom: 1px solid var(--border);
    }

    .sidebar-link .ring {
        width: 24px;
        height: 24px;
    }

    .sidebar-link .ring::after {
        width: 16px;
        height: 16px;
    }
}

@media (max-width: 720px) {

    /* strip runs edge to edge so it reads as scrollable */
    .roadmap-sidebar {
        margin: 0 -16px;
        padding: 0 16px 2px;
        scroll-padding: 0 16px;
    }

    .topic-card>summary {
        padding: 16px 14px;
        gap: 10px;
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .topic-card .chev {
        margin-top: 6px;
    }

    .topic-card .topic-title h3 {
        font-size: 1.14rem;
        gap: 8px;
    }

    /* progress count drops under the title, aligned with it */
    .topic-progress-text {
        flex-basis: 100%;
        padding-left: 24px;
        font-size: .72rem;
    }

    .topic-body {
        padding: 2px 12px 16px;
    }

    .subtopic>summary {
        padding: 11px 10px;
        gap: 8px;
    }

    .lesson-list {
        padding-left: 10px;
        margin-left: 9px;
    }

    .lesson-row {
        min-height: 48px;
        padding: 10px 6px;
        font-size: .9rem;
    }

    .unlock-row {
        flex-wrap: wrap;
        gap: 12px;
        margin-left: 0;
        padding: 14px;
    }

    .unlock-row .u-flag {
        writing-mode: horizontal-tb;
        flex-basis: 100%;
    }

    .unlock-row .btn {
        flex: 1 1 100%;
    }
}