/* Unit reviews (short, medium, long) and the figures they use (js/figures.js). Loads after v6.css. */

/* length switch */
.rv-lens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; background: var(--paper-2); padding: 6px; border-radius: 22px; margin: 6px 0 26px; max-width: 760px; }
.rv-lens a { text-decoration: none; border-radius: 17px; padding: 12px 16px; display: grid; gap: 2px; color: var(--ink-2); }
.rv-lens a b { font-size: 16px; font-weight: 650; color: var(--ink); }
.rv-lens a small { font-size: 12.5px; color: var(--ink-3); }
.rv-lens a:hover { background: rgba(255,255,255,.6); }
.rv-lens a.on { background: #fff; box-shadow: 0 1px 2px rgba(10,10,20,.06), 0 4px 14px rgba(10,10,20,.06); }
.rv-lens a.on small { color: var(--brand-2); }

/* layout: long review gets a contents rail */
.rv-wrap { display: block; }
.rv-wrap.has-toc { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 34px; align-items: start; }
.rv-toc { position: sticky; top: 84px; display: grid; gap: 2px; max-height: calc(100vh - 110px); overflow: auto; padding-right: 6px; }
.rv-toc .kicker { margin-bottom: 6px; }
.rv-toc a { text-decoration: none; font-size: 14px; color: var(--ink-2); padding: 7px 10px; border-radius: 10px; line-height: 1.25; }
.rv-toc a:hover { background: var(--paper-2); color: var(--ink); }
@media (max-width: 920px) { .rv-wrap.has-toc { display: block; } .rv-toc { display: none; } }

.rvw { max-width: 820px; display: grid; gap: 18px; grid-template-columns: minmax(0, 1fr); }
/* nothing inside a review may stretch the page wider than the screen: wide code and tables scroll inside their own box */
.rvw > *, .rv-ex > *, .rv-chk > *, .rv-cmp > *, .rv-traps > *, .rv-key > *, .rv-eqs > *, .fig > *, .rv-figs > * { min-width: 0; }
.rvw pre, .rvw .fig-code pre { max-width: 100%; overflow-x: auto; }
.rv-h { font-size: 28px; margin: 22px 0 0; scroll-margin-top: 90px; display: grid; gap: 4px; }
.rv-h:first-child { margin-top: 0; }
.rv-h .kicker { color: var(--brand-2); }
.rv-p { font-size: 17px; line-height: 1.6; color: var(--ink); margin: 0; }
.rvw h3 { font-size: 18px; margin: 0 0 10px; }

.rv-key { background: var(--brand-soft); border-radius: var(--r); padding: 20px 24px; }
.rv-key ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.rv-key li { position: relative; padding-left: 30px; font-size: 16.5px; line-height: 1.5; }
.rv-key li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 20px; height: 20px; border-radius: 6px; background: var(--brand); color: #fff; font-size: 13px; font-weight: 800; display: grid; place-items: center; margin-top: 2px; }

.rv-eqs { border: 1px solid var(--line); border-radius: var(--r); padding: 18px 22px; }
.rv-eq { display: grid; grid-template-columns: minmax(180px, 38%) 1fr; gap: 18px; align-items: center; padding: 12px 0; border-top: 1px solid var(--line); }
.rv-eqs h3 + .rv-eq, .rv-eq:first-child { border-top: 0; }
.rv-eq-f { font-size: 19px; }
.rv-eq b { font-weight: 600; display: block; line-height: 1.4; }
.rv-eq small { display: block; color: var(--ink-3); font-size: 13.5px; margin-top: 2px; }
@media (max-width: 640px) { .rv-eq { grid-template-columns: 1fr; gap: 6px; } }

.rv-ex { border: 1px solid var(--line); border-left: 5px solid var(--blue); border-radius: var(--r); padding: 18px 22px; display: grid; gap: 10px; }
.rv-ex-q { font-weight: 600; font-size: 16.5px; line-height: 1.5; }
.rv-ex ol { margin: 0; padding-left: 22px; display: grid; gap: 6px; line-height: 1.55; }
.rv-ex-a { display: flex; gap: 10px; align-items: flex-start; background: var(--green-soft); color: #0E5A2E; border-radius: 12px; padding: 12px 14px; font-weight: 600; }
.rv-ex-a .i { width: 20px; height: 20px; flex: 0 0 auto; margin-top: 1px; }

.rv-traps { border-radius: var(--r); background: var(--red-soft); padding: 18px 22px; }
.rv-trap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 10px 0; border-top: 1px solid rgba(226,71,95,.18); line-height: 1.45; }
.rv-traps h3 + .rv-trap { border-top: 0; }
.rv-trap .bad { color: #9B1C33; font-weight: 600; }
.rv-trap .good { color: var(--ink); }
@media (max-width: 640px) { .rv-trap { grid-template-columns: 1fr; gap: 4px; } }

.rv-cmp { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.rv-cmp > div { background: var(--paper-2); border-radius: var(--r); padding: 16px 20px; }
.rv-cmp h4 { margin: 0 0 8px; font-size: 16px; }
.rv-cmp ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; line-height: 1.45; }
@media (max-width: 640px) { .rv-cmp { grid-template-columns: 1fr; } }

.rv-tip { display: flex; gap: 16px; align-items: center; background: var(--orange-soft); border-radius: var(--r); padding: 14px 20px 14px 14px; }
.rv-tip img { width: 74px; height: 74px; object-fit: contain; flex: 0 0 auto; }
.rv-tip .kicker { color: #A4520F; }
.rv-tip p { margin: 4px 0 0; line-height: 1.5; }

.rv-list ul, .rv-list ol { margin: 0; padding-left: 22px; display: grid; gap: 6px; line-height: 1.55; }

.rv-chk { border: 1.5px dashed var(--line-2); border-radius: var(--r); padding: 18px 22px; display: grid; gap: 10px; }
.rv-chk-q { font-weight: 600; font-size: 16.5px; line-height: 1.5; }
.rv-chk-c { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.rv-chk-c button { text-align: left; font: inherit; display: flex; gap: 10px; align-items: center; padding: 11px 14px; border-radius: 14px; border: 1.5px solid var(--line-2); background: #fff; cursor: pointer; line-height: 1.35; }
.rv-chk-c button > .rv-let { flex: 0 0 auto; width: 26px; height: 26px; border-radius: 8px; background: var(--paper-2); display: grid; place-items: center; font-weight: 700; font-size: 13px; }
.rv-chk-c button:hover:not(:disabled) { border-color: var(--ink); }
.rv-chk-c button.right { border-color: var(--green); background: var(--green-soft); }
.rv-chk-c button.right > .rv-let { background: var(--green); color: #fff; }
.rv-chk-c button > .rv-ans { min-width: 0; overflow-wrap: anywhere; }
.rv-chk-c button > .rv-ans .katex { white-space: nowrap; }
.rv-chk-c button.wrong { border-color: var(--red); background: var(--red-soft); }
.rv-chk-c button:disabled { cursor: default; }
.rv-chk-ex { background: var(--paper-2); border-radius: 12px; padding: 12px 14px; line-height: 1.5; }
@media (max-width: 640px) { .rv-chk-c { grid-template-columns: 1fr; } }

.rv-end { display: flex; gap: 18px; align-items: center; margin-top: 10px; }
.rv-end img { width: 92px; flex: 0 0 auto; }
.rv-end h3 { margin: 0 0 4px; }
.rv-end .row-actions { margin-top: 12px; flex-wrap: wrap; }
@media (max-width: 640px) { .rv-end { flex-direction: column; align-items: flex-start; } }

/* long review without Plus: the opening section fades into a Plus card */
.rv-lens a { position: relative; }
.rv-plus { position: absolute; top: 8px; right: 10px; font-size: 11px; font-weight: 750; letter-spacing: .02em; color: #fff; background: var(--ink); border-radius: 999px; padding: 2px 8px; }
.rv-toc a.locked { color: var(--ink-3); }
.rv-toc a.locked .i { width: 13px; height: 13px; vertical-align: -2px; }
.rv-lock { position: relative; display: flex; gap: 18px; align-items: flex-start; padding: 24px; border: 1.5px solid var(--ink); }
.rv-lock::before { content: ''; position: absolute; left: -1px; right: -1px; top: -150px; height: 148px; background: linear-gradient(to bottom, rgba(255,255,255,0), #fff 85%); pointer-events: none; }
.rv-lock img { width: 84px; height: 84px; object-fit: contain; flex: 0 0 auto; }
.rv-lock h3 { margin: 4px 0 8px; }
.rv-lock p { line-height: 1.5; }
.rv-lock-list { list-style: none; padding: 0; margin: 12px 0 16px; display: grid; gap: 6px; color: var(--ink-2); }
.rv-lock-list .i { width: 14px; height: 14px; vertical-align: -2px; color: var(--ink-3); }
@media (max-width: 640px) { .rv-lock { flex-direction: column; padding: 18px; } .rv-lock img { width: 64px; height: 64px; } }

/* answer choices never spill past the screen: long words (ArrayIndexOutOfBoundsException) break, code answers scroll in their box */
.choice > span:not(.L) { flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }
.choice pre.code { max-width: 100%; overflow-x: auto; }
.q, .qcard, .choices, .choice { min-width: 0; }
.choices { grid-template-columns: minmax(0, 1fr); }
.cp .choices { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
@media (max-width: 760px) { .cp .choices { grid-template-columns: minmax(0, 1fr); } }
.q pre.code { max-width: 100%; overflow-x: auto; }
@media (max-width: 640px) { .choice pre.code { font-size: 12px; } .q pre.code { font-size: 13px; padding: 12px; } }

/* question text that mixes sentences and code (app.js txt): sentences as text, code in its block */
.qp { margin: 0 0 10px; }
.qp:last-child { margin-bottom: 0; }
.choice .qp { margin: 0; }

/* figures */
.fig { margin: 0; background: #FDFCF8; border: 1px solid var(--line); border-radius: var(--r); padding: 16px; display: grid; gap: 10px; }
.fig figcaption { font-size: 14px; color: var(--ink-2); line-height: 1.45; text-align: center; }
.rv-figs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.fig-box { position: relative; width: 100%; max-height: 460px; margin: 0 auto; container-type: inline-size; }
.fig-fbd .fig-box { max-width: 380px; }
.fig-grid .fig-box { max-width: 520px; }
.fig-bars .fig-box { max-width: 640px; }
.fig-box svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
/* labels scale with their figure (cqw = % of the figure's width), so a phone shows the same layout as a laptop, never below 9-10px */
.fig-l { position: absolute; transform: translate(-50%, -50%); white-space: nowrap; font-size: clamp(10px, 2.5cqw, 17px); line-height: 1.1; pointer-events: none; }
.fig-l.al-r { transform: translate(-100%, -50%); }
.fig-l.al-l { transform: translate(0, -50%); }
.fig-l.b { font-weight: 700; }
.fig-l.s { font-size: clamp(9px, 1.9cqw, 13px); }
.fig-l.h { font-size: clamp(10px, 2.35cqw, 16px); }
@media (max-width: 600px) { .fig { padding: 8px; } }
.fig-l.bgw { background: rgba(253,252,248,.9); padding: 0 4px; border-radius: 4px; }
.fig-table-w { overflow-x: auto; }
.fig-table { border-collapse: separate; border-spacing: 0; margin: 0 auto; border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; min-width: 50%; }
.fig-table th { background: var(--brand-soft); color: var(--brand-2); font-weight: 700; padding: 8px 14px; font-size: 14px; }
.fig-table td { padding: 8px 14px; border-top: 1px solid var(--line); text-align: center; font-size: 15px; background: #fff; }
.fig-table.mono td { font-family: ui-monospace, "SF Mono", Menlo, monospace; }
.fig-table tr.hl td { background: #FFF6D6; font-weight: 700; }
.fig-code pre { margin: 0; background: #1E2235; color: #E9ECF5; border-radius: 14px; padding: 14px 0; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 14.5px; line-height: 1.55; overflow-x: auto; }
.fig-code .ln { display: block; padding: 0 16px 0 10px; border-left: 4px solid transparent; white-space: pre; }
.fig-code .ln i { display: inline-block; width: 26px; color: #6E7591; font-style: normal; text-align: right; margin-right: 14px; user-select: none; }
.fig-code .ln.lit { background: rgba(255,224,122,.16); border-left-color: #FFE07A; }
.fig-code .mk { display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: #FFE07A; color: #1E2235; font-size: 11px; margin-left: 10px; vertical-align: 1px; }
.fig-code .kw { color: #C7A6FF; font-weight: 700; }
.fig-code .st { color: #8FE3A8; }
.fig-code .nu { color: #FFB561; }
.fig-code .cm { color: #8C93AD; font-style: italic; }
.fig-notes { margin: 10px 0 0; padding-left: 22px; display: grid; gap: 4px; font-size: 14.5px; line-height: 1.45; }
.fig-notes .mono { font-family: ui-monospace, Menlo, monospace; font-size: 12.5px; color: var(--ink-3); margin-right: 6px; }
.fig-out { margin-top: 8px; background: #0F1222; color: #9BF0B8; border-radius: 10px; padding: 9px 14px; font-family: ui-monospace, Menlo, monospace; font-size: 14px; white-space: pre-wrap; }
.fig-out span { color: #6E7591; }

/* review link in the classes list */
.acc-review { display: flex; gap: 14px; align-items: center; margin-top: 16px; padding: 14px 18px; text-decoration: none; }
.acc-review > span { flex: 1; display: grid; gap: 2px; }
.acc-review small { color: var(--ink-3); }
.acc-review .i { width: 20px; height: 20px; }

/* in-video check-in: the question's code sits under the question; code-style answers in monospace */
.cp-qw { min-width: 0; }
.cp-qw pre.code { font-size: 14px; margin: 8px 0 0; max-width: 100%; overflow-x: auto; }
.choice .mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 14.5px; font-weight: 600; }

/* unit notes: the reading column never grows wider than the screen */
.lesson-read { grid-template-columns: minmax(0, 1fr); }
.lesson-read > *, .lesson-read .card > * { min-width: 0; }
.lesson-read .card div { min-width: 0; }
.lesson-read .card { overflow-wrap: break-word; }
@media (max-width: 640px) { .bigidea { grid-template-columns: 64px minmax(0, 1fr); gap: 12px; } .bigidea img { width: 64px; height: auto; } }
.lesson-read .codechip { white-space: normal; overflow-wrap: anywhere; }
.row-actions { flex-wrap: wrap; }
@media (max-width: 640px) { .page-head { flex-wrap: wrap; } .page-head > * { min-width: 0; } }

/* FRQ pages: code in a setup or a part scrolls inside its own box; the page never grows past the screen */
.frq { grid-template-columns: minmax(0, 1fr); }
.frq > *, .frq .card > *, .frq-part > *, .frq-q > div { min-width: 0; }
/* site-wide: no code block is ever wider than the box it sits in */
pre.code { max-width: 100%; }

/* Mr. Thompkins' class announcements (Quizzes page) and diagrams on FRQ pages */
.tpost { display: flex; gap: 18px; align-items: flex-start; border: 1.5px solid var(--ink); }
.tpost img { width: 80px; height: 80px; object-fit: contain; flex: 0 0 auto; }
.tpost > div { min-width: 0; }
.tpost h2 { margin: 4px 0 2px; font-size: 22px; }
.tpost .when-chip { display: inline-block; margin: 4px 0 8px; font-weight: 700; font-size: 13px; color: #A4520F; background: var(--orange-soft); border-radius: 999px; padding: 3px 10px; }
.tpost p { line-height: 1.5; }
.tpost-list { margin: 6px 0 14px; padding-left: 20px; display: grid; gap: 4px; line-height: 1.45; }
@media (max-width: 640px) { .tpost { flex-direction: column; } .tpost img { width: 60px; height: 60px; } }
.frq-figs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin-top: 14px; }
.frq-figs > *, .model .fig { min-width: 0; }
.model .fig { margin-top: 12px; max-width: 420px; }

/* unit page: Mr. Thompkins' practice FRQs for that unit */
.tfrqs { border: 1.5px solid var(--ink); }
.tfrq-list { display: grid; gap: 6px; margin-top: 8px; }
.tfrq-list .trow span { display: grid; gap: 2px; min-width: 0; }
.tfrq-list .trow small { color: var(--ink-3); font-size: 13px; }

/* class invite page (#/join/<code>) */
.join-wrap { max-width: 640px; margin: 0 auto; padding: 32px 16px 64px; }
.join-card { display: grid; gap: 10px; padding: 28px; border: 1.5px solid var(--ink); }
.join-mrt { width: 88px; height: 88px; object-fit: contain; }
.join-card h1 { margin: 2px 0 4px; font-size: clamp(26px, 5vw, 34px); line-height: 1.1; }
/* phones: tighter table cells, so a three-column table fits without swiping */
@media (max-width: 640px) { .fig-table th, .fig-table td { padding: 6px 8px; font-size: 13.5px; } .fig-table { min-width: 0; } }

/* ---------- unit lectures ---------- */
.lx-start { display: flex; gap: 16px; align-items: center; text-decoration: none; color: inherit; border: 1.5px solid var(--ink); padding: 16px 18px; }
.lx-start img { width: 72px; height: 72px; object-fit: contain; flex: 0 0 auto; }
.lx-start > span { display: grid; gap: 4px; flex: 1; min-width: 0; }
.lx-start b { font-size: 19px; }
.lx-start small { color: var(--ink-3); line-height: 1.4; }
.lx-head { display: grid; gap: 8px; margin-bottom: 14px; }
.lx-head h1 { margin: 0; }
.lx-prog { display: flex; gap: 10px; align-items: center; font-size: 13px; color: var(--ink-3); }
.lx-bar { flex: 1; max-width: 360px; height: 8px; background: var(--paper-2); border-radius: 999px; overflow: hidden; }
.lx-bar i { display: block; height: 100%; background: var(--green, #1B8F5E); border-radius: 999px; }
.lx-toc summary { cursor: pointer; font-weight: 650; padding: 8px 12px; background: var(--paper-2); border-radius: 12px; }
.lx-toc ol { margin: 8px 0 0; padding-left: 24px; display: grid; gap: 4px; }
.lx-toc li.on a { font-weight: 700; color: var(--ink); }
.lx-toc a { text-decoration: none; color: var(--ink-2); }
.lx-toc small { color: var(--ink-3); }
.lx-goal { background: var(--brand-soft); border-radius: var(--r); padding: 12px 16px; line-height: 1.5; }
.lx-say { display: flex; gap: 12px; align-items: flex-end; }
.lx-say img { width: 64px; height: 64px; object-fit: contain; flex: 0 0 auto; }
.lx-say .bubble { position: relative; background: #fff; border: 1.5px solid var(--line-2); border-radius: 18px 18px 18px 4px; padding: 12px 16px; line-height: 1.5; min-width: 0; flex: 1; }
.lx-say .who { font-size: 12.5px; font-weight: 700; color: var(--brand-2, var(--ink-2)); margin-bottom: 2px; }
.lx-recall { border: 1.5px solid #E7D9FF; background: #FAF6FF; border-radius: 14px; }
.lx-recall summary { cursor: pointer; list-style: none; display: flex; gap: 10px; align-items: center; padding: 10px 14px; font-weight: 600; }
.lx-recall summary::-webkit-details-marker { display: none; }
.lx-recall .lx-ic { flex: 0 0 auto; width: 24px; height: 24px; border-radius: 50%; background: #7546D6; color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 14px; }
.lx-recall[open] summary { border-bottom: 1px solid #E7D9FF; }
.lx-recall-a { padding: 10px 14px 12px 48px; line-height: 1.5; }
.lx-pause { border: 1.5px dashed #E8B04B; background: #FFFBF0; border-radius: var(--r); padding: 14px 18px; display: grid; gap: 8px; justify-items: start; }
.lx-pause .kicker { color: #A4520F; }
.lx-pause .lx-q { font-weight: 600; line-height: 1.5; justify-self: stretch; }
.lx-q pre, .lx-a pre, .lx-steps pre { max-width: 100%; overflow-x: auto; }
.lx-pause .lx-a { line-height: 1.5; background: #fff; border-radius: 12px; padding: 10px 14px; justify-self: stretch; }
.lx-walk { border: 1.5px solid var(--line-2); border-left: 4px solid var(--brand); border-radius: var(--r); padding: 16px 18px; display: grid; gap: 10px; }
.lx-steps { margin: 0; padding-left: 22px; display: grid; gap: 10px; }
.lx-steps li { line-height: 1.5; }
.lx-why { margin-top: 4px; border: 0; background: none; color: var(--brand); font-weight: 650; cursor: pointer; padding: 0; font: inherit; font-weight: 650; }
.lx-why-a { margin-top: 6px; background: var(--paper-2); border-radius: 10px; padding: 8px 12px; line-height: 1.5; }
.lx-ans { background: var(--green-soft, #E8F6EF); border-radius: 12px; padding: 10px 14px; line-height: 1.5; }
.lx-stuck { display: grid; gap: 8px; justify-items: start; }
.lx-hints { margin: 0; padding-left: 22px; display: grid; gap: 6px; line-height: 1.5; }
.lx-nav { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-top: 12px; padding-top: 16px; border-top: 1px solid var(--line); }
.lx-nav .btn.big { white-space: normal; text-align: center; }
.lx-steps > li > div, .lx-pause > *, .lx-walk > *, .lx-say .bubble > * { min-width: 0; }
@media (max-width: 640px) { .lx-say img { width: 48px; height: 48px; } .lx-nav .btn { flex: 1 1 100%; } }

/* ---------- visual notes on the unit page ---------- */
.vn { display: grid; gap: 16px; }
.vn > *, .vn-card > *, .vn-grid > *, .vn-eqs > *, .vn-traps > * { min-width: 0; }
.vn-hero { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 18px; align-items: center; padding: 20px 22px; border-radius: var(--r); border: 1px solid color-mix(in srgb, var(--vn) 30%, var(--line)); background: linear-gradient(135deg, color-mix(in srgb, var(--vn) 13%, #fff), #fff 75%); }
.vn-hero img { width: 96px; height: 96px; object-fit: contain; }
.vn-big { font-size: 22px; font-weight: 750; line-height: 1.3; margin: 6px 0 12px; letter-spacing: -0.01em; }
.vn-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.vn-chips span { font-size: 13px; font-weight: 650; padding: 5px 11px; border-radius: 999px; background: color-mix(in srgb, var(--vn) 13%, #fff); color: color-mix(in srgb, var(--vn) 70%, #000); }
.vn-plain { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 18px 22px; }
.vn-plain h3 { margin: 0 0 8px; font-size: 18px; }
.vn-plain p { margin: 0 0 10px; line-height: 1.6; }
.vn-plain p:last-child { margin-bottom: 0; }
.vn-h { font-size: 23px; margin: 16px 0 0; letter-spacing: -0.015em; }
.vn-map { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); gap: 10px; }
.vn-map button { width: 100%; height: 100%; display: flex; gap: 12px; align-items: center; text-align: left; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 10px 12px; cursor: pointer; font: inherit; color: inherit; transition: border-color .15s ease, transform .15s ease; }
.vn-map button:hover { border-color: var(--vn); transform: translateY(-1px); }
.vn-map button > span:last-child { min-width: 0; }
.vn-map small { display: block; color: var(--ink-3); font-size: 12px; font-weight: 600; }
.vn-map b { display: block; font-size: 14.5px; line-height: 1.3; }
.vn-num { flex: 0 0 auto; width: 30px; height: 30px; border-radius: 10px; background: var(--vn); color: #fff; font-weight: 800; font-size: 14px; display: grid; place-items: center; }
.vn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 430px), 1fr)); gap: 16px; align-items: start; }
.vn-card { background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--vn); border-radius: var(--r); padding: 16px 18px 18px; display: grid; gap: 12px; scroll-margin-top: 96px; }
.vn-card header { display: flex; gap: 12px; align-items: flex-start; }
.vn-card header > div { min-width: 0; }
.vn-card header small { color: color-mix(in srgb, var(--vn) 75%, #000); font-weight: 650; font-size: 12.5px; }
.vn-card h3 { margin: 2px 0 0; font-size: 19px; line-height: 1.25; }
.vn-fig .fig { margin: 0; }
.vn-keys { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.vn-keys li { position: relative; padding-left: 28px; line-height: 1.5; font-size: 15.5px; }
.vn-keys li::before { content: "✓"; position: absolute; left: 0; top: 2px; width: 19px; height: 19px; border-radius: 6px; background: var(--vn); color: #fff; font-size: 12px; font-weight: 800; display: grid; place-items: center; }
.vn-more { justify-self: start; display: inline-flex; gap: 6px; align-items: center; font-weight: 700; font-size: 14px; color: color-mix(in srgb, var(--vn) 80%, #000); text-decoration: none; }
.vn-more svg { width: 16px; height: 16px; }
.vn-eqs, .vn-traps { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr)); gap: 12px; }
.vn-eq { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: grid; gap: 10px; align-content: start; }
.vn-eq-f { font-size: 17px; overflow-x: auto; padding: 12px 14px; border-radius: 10px; background: color-mix(in srgb, var(--vn) 7%, #fff); }
.vn-eq p { margin: 0; color: var(--ink-2); line-height: 1.45; font-size: 15px; }
.vn-trap { display: flex; gap: 12px; align-items: flex-start; background: #FFF5F4; border: 1px solid #F4D2CD; border-radius: 14px; padding: 14px 16px; }
.vn-trap p { margin: 0; line-height: 1.5; }
.vn-x, .vn-ok { flex: 0 0 auto; width: 24px; height: 24px; border-radius: 50%; color: #fff; display: inline-grid; place-items: center; font-weight: 800; font-size: 12px; margin-right: 10px; }
.vn-trap .vn-x { margin-right: 0; }
.vn-x { background: #D9473B; }
.vn-ok { background: #1F9D55; }
.vn-myth { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: grid; gap: 10px; }
.vn-myth p { margin: 0; display: flex; align-items: flex-start; line-height: 1.5; }
.vn-m { color: #9A2F25; }
.vn-ex { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--vn); border-radius: var(--r); padding: 18px 22px; display: grid; gap: 10px; margin-top: 8px; }
.vn-ex ol { margin: 0; padding-left: 22px; display: grid; gap: 6px; line-height: 1.55; }
.vn-ans { margin: 0; font-weight: 700; background: color-mix(in srgb, var(--vn) 10%, #fff); border-radius: 10px; padding: 10px 14px; }
.vn-text { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 14px 18px; }
.vn-text summary { cursor: pointer; font-weight: 700; }
.vn-text .ideas { margin: 12px 0 0; }
@media (max-width: 640px) {
  .vn-hero { grid-template-columns: 64px minmax(0, 1fr); gap: 12px; padding: 16px; }
  .vn-hero img { width: 64px; height: 64px; }
  .vn-big { font-size: 19px; }
  .vn-plain, .vn-ex { padding: 16px; }
  .vn-card { padding: 14px 14px 16px; }
}
@media (max-width: 640px) { .lx-start small { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; } .lx-start img { width: 56px; height: 56px; } }

/* ---------- slide lectures ---------- */
.sl-wrap { display: grid; gap: 12px; }
.sl-wrap:fullscreen { background: #fff; padding: 22px 28px; overflow: auto; align-content: start; }
.sl-wrap:fullscreen .sl-stage { min-height: calc(100vh - 210px); }
.sl-top { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; }
.sl-top-l { min-width: 0; }
.sl-sec { font-size: 15px; color: var(--ink-2); margin-top: 4px; }
.sl-sec b { color: var(--ink); }
.sl-top-r { display: flex; gap: 8px; }
.sl-prog { height: 6px; border-radius: 99px; background: color-mix(in srgb, var(--c) 14%, #fff); overflow: hidden; }
.sl-prog i { display: block; height: 100%; background: var(--c); border-radius: 99px; transition: width .4s cubic-bezier(.22,1,.36,1); }
.sl-stage { position: relative; min-height: min(70vh, 640px); border-radius: 28px; border: 1px solid color-mix(in srgb, var(--c) 22%, var(--line)); background: radial-gradient(90% 70% at 100% 0%, color-mix(in srgb, var(--c) 12%, #fff), #fff 60%), #fff; overflow: hidden; display: flex; }
.sl-stage::after { content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%; left: -160px; bottom: -220px; background: radial-gradient(circle, color-mix(in srgb, var(--c) 10%, transparent), transparent 70%); pointer-events: none; }
.sl-slide { position: relative; z-index: 1; flex: 1; min-width: 0; padding: 44px 56px; display: flex; flex-direction: column; justify-content: center; gap: 22px; animation: slIn .5s cubic-bezier(.22,1,.36,1) both; }
.sl-slide.back { animation-name: slBack; }
@keyframes slIn { from { opacity: 0; transform: translateX(46px); } to { opacity: 1; transform: none; } }
@keyframes slBack { from { opacity: 0; transform: translateX(-46px); } to { opacity: 1; transform: none; } }
.sl-slide [data-b] { opacity: 0; transform: translateY(18px); transition: opacity .45s ease, transform .5s cubic-bezier(.22,1,.36,1); }
.sl-slide [data-b].in { opacity: 1; transform: none; }
.sl-title { display: grid; gap: 14px; justify-items: start; }
.sl-num { display: inline-flex; background: var(--c); color: #fff; border-radius: 999px; padding: 7px 15px; font-weight: 800; font-size: 14px; }
.sl-kick { color: color-mix(in srgb, var(--c) 75%, #000); }
.sl-h1 { font-size: clamp(36px, 5.6vw, 68px); line-height: 1.02; letter-spacing: -0.045em; margin: 0; animation: slTitle .7s cubic-bezier(.22,1,.36,1) both .05s; }
@keyframes slTitle { from { opacity: 0; transform: translateY(30px) scale(.98); filter: blur(4px); } to { opacity: 1; transform: none; filter: none; } }
.sl-h2 { font-size: clamp(26px, 3.4vw, 40px); letter-spacing: -0.035em; margin: 0; }
.sl-talk { display: flex; gap: 16px; align-items: flex-end; margin-top: 8px; }
.sl-face { width: clamp(92px, 13vw, 150px); height: auto; flex: 0 0 auto; filter: drop-shadow(0 14px 20px rgba(0,0,0,.12)); }
.sl-bubble { position: relative; background: #fff; border: 1.5px solid var(--line); border-radius: 26px 26px 26px 6px; padding: 18px 22px; font-size: clamp(17px, 2vw, 22px); line-height: 1.45; box-shadow: 0 18px 44px rgba(0,0,0,.07); max-width: 760px; }
.sl-bubble .who { font-size: 13px; font-weight: 800; color: color-mix(in srgb, var(--c) 80%, #000); margin-bottom: 4px; }
.sl-sayonly .sl-face { width: clamp(120px, 18vw, 210px); }
.sl-sayonly .sl-bubble { font-size: clamp(19px, 2.4vw, 27px); }
.sl-lines { display: grid; gap: 16px; min-width: 0; }
.sl-line { margin: 0; font-size: clamp(18px, 2.15vw, 25px); line-height: 1.45; letter-spacing: -0.01em; padding-left: 20px; border-left: 4px solid color-mix(in srgb, var(--c) 30%, #fff); }
.sl-line.lead { font-weight: 650; border-left-color: var(--c); }
.sl-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 34px; align-items: center; }
.sl-fig .fig { background: #fff; box-shadow: 0 20px 50px rgba(0,0,0,.07); }
.sl-fig.solo { max-width: 860px; width: 100%; align-self: center; }
.sl-fig.solo .fig-box { max-height: 50vh; }
.sl-fig.solo.has-notes .fig-box { max-height: 33vh; }
.sl-callout { padding: 9px 14px; }
.sl-fig .fig { padding: 12px; }
.sl-key ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 14px; }
.sl-key li { position: relative; padding: 14px 18px 14px 58px; background: #fff; border: 1px solid var(--line); border-radius: 18px; font-size: clamp(17px, 2vw, 22px); line-height: 1.42; }
.sl-key li::before { content: "✓"; position: absolute; left: 16px; top: 14px; width: 28px; height: 28px; border-radius: 9px; background: var(--c); color: #fff; font-weight: 800; display: grid; place-items: center; font-size: 16px; transform: scale(0); transition: transform .4s cubic-bezier(.34,1.56,.64,1) .2s; }
.sl-key li.in::before { transform: scale(1); }
.sl-block { max-width: 900px; width: 100%; align-self: center; font-size: 1.06em; }
.sl-block .lx-pause, .sl-block .lx-walk, .sl-block .rv-chk { background: #fff; box-shadow: 0 18px 44px rgba(0,0,0,.06); }
.sl-block .lx-q, .sl-block .rv-chk-q, .sl-block .rv-ex-q { font-size: clamp(19px, 2.3vw, 25px); line-height: 1.38; }
.sl-k-block .sl-block .rv-chk-c button { font-size: 17px; }
.sl-asides { display: flex; flex-wrap: wrap; gap: 10px; }
.sl-recall { background: #F4F1FF; border: 1px solid #DDD6FB; border-radius: 16px; max-width: 100%; }
.sl-recall summary { list-style: none; cursor: pointer; display: flex; gap: 10px; align-items: center; padding: 10px 14px; font-weight: 700; font-size: 15px; }
.sl-recall summary::-webkit-details-marker { display: none; }
.sl-recall-a { padding: 0 16px 14px 46px; line-height: 1.5; max-width: 680px; }
.sl-hints { max-width: 900px; width: 100%; align-self: center; }
.sl-ctrl { display: flex; align-items: center; gap: 12px; }
.sl-prev { width: 52px; padding: 0; justify-content: center; }
.sl-prev:disabled { opacity: .35; }
.sl-dots { display: flex; gap: 6px; flex: 1; min-width: 0; flex-wrap: wrap; }
.sl-dots span { width: 9px; height: 9px; border-radius: 50%; background: var(--line); transition: background .25s ease, transform .25s ease; }
.sl-dots span.on { background: var(--c); transform: scale(1.15); }
.sl-count { font-size: 14px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.sl-next { min-width: 180px; justify-content: center; }
.sl-help { font-size: 13px; color: var(--ink-3); text-align: center; }
.sl-alt { margin: 8px 4px 0; font-size: 14px; color: var(--ink-3); }
.sl-alt a { color: var(--brand-2); font-weight: 700; }
.sl-start { border-color: var(--brand); }
.sl-switch { margin: 10px 0 4px; }
@media (max-width: 760px) {
  .sl-split { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .sl-slide { padding: 26px 18px 30px; justify-content: flex-start; gap: 18px; }
  .sl-stage { min-height: calc(100vh - 330px); border-radius: 22px; }
  .sl-ctrl { position: sticky; bottom: calc(68px + env(safe-area-inset-bottom)); z-index: 30; background: rgba(255,255,255,.94); backdrop-filter: blur(10px); padding: 8px; margin: 0 -8px; border-radius: 18px; }
  .sl-top-r .btn { padding: 6px 10px; font-size: 13px; }
  .sl-next { min-width: 0; flex: 0 0 auto; }
  .sl-count { display: none; }
  .sl-help { display: none; }
  .sl-talk { gap: 10px; }
}
@media (prefers-reduced-motion: reduce) { .sl-slide, .sl-h1, .sl-slide [data-b] { animation: none !important; transition: none !important; } }

/* slide lectures: authored slide types */
.sl-em { font-style: normal; color: color-mix(in srgb, var(--c) 85%, #000); background: linear-gradient(transparent 62%, color-mix(in srgb, var(--c) 18%, transparent) 62%); padding: 0 .08em; }
.sl-big { display: grid; gap: 18px; }
.sl-bigt { font-family: var(--head); font-size: clamp(40px, 7vw, 88px); font-weight: 800; line-height: 1.02; letter-spacing: -0.045em; }
.sl-bigt.in { animation: slSlam .55s cubic-bezier(.2,1.4,.4,1) both; }
@keyframes slSlam { from { opacity: 0; transform: scale(1.12); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }
.sl-sub { margin: 0; font-size: clamp(18px, 2.3vw, 26px); color: var(--ink-2); line-height: 1.4; max-width: 820px; }
.sl-bul { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; min-width: 0; }
.sl-bul li { position: relative; padding-left: 34px; font-size: clamp(18px, 2.2vw, 26px); line-height: 1.38; letter-spacing: -0.01em; }
.sl-bul li::before { content: ""; position: absolute; left: 4px; top: .48em; width: 14px; height: 14px; border-radius: 5px; background: var(--c); transform: rotate(45deg) scale(0); transition: transform .45s cubic-bezier(.34,1.56,.64,1) .1s; }
.sl-bul li.in::before { transform: rotate(45deg) scale(1); }
.sl-callouts { display: grid; gap: 10px; max-width: 860px; width: 100%; align-self: center; }
.sl-callout { display: flex; gap: 12px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 12px 16px; font-size: clamp(16px, 1.9vw, 20px); line-height: 1.4; }
.sl-callout span { flex: 0 0 auto; width: 28px; height: 28px; border-radius: 50%; background: var(--c); color: #fff; font-weight: 800; font-size: 14px; display: grid; place-items: center; }
.sl-stat { display: grid; justify-items: center; text-align: center; gap: 10px; }
.sl-statv { font-family: var(--head); font-size: clamp(80px, 15vw, 180px); font-weight: 800; line-height: .95; letter-spacing: -0.05em; color: var(--c); font-variant-numeric: tabular-nums; }
.sl-statl { font-size: clamp(20px, 2.6vw, 30px); font-weight: 700; max-width: 760px; line-height: 1.3; }
.sl-compare { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 18px; align-items: stretch; }
.sl-col { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 20px 22px; box-shadow: 0 16px 40px rgba(0,0,0,.05); }
.sl-col.l { border-top: 6px solid var(--c); }
.sl-col.r { border-top: 6px solid #0B0B10; }
.sl-col.l[data-b] { transform: translateX(-30px); } .sl-col.r[data-b] { transform: translateX(30px); }
.sl-col[data-b].in { transform: none; }
.sl-col h3 { margin: 0 0 12px; font-size: clamp(20px, 2.4vw, 28px); letter-spacing: -0.02em; }
.sl-col ul { margin: 0; padding-left: 20px; display: grid; gap: 8px; font-size: clamp(16px, 1.9vw, 20px); line-height: 1.4; }
.sl-vs { align-self: center; font-weight: 800; font-size: 18px; color: #fff; background: #0B0B10; border-radius: 50%; width: 46px; height: 46px; display: grid; place-items: center; }
.sl-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 34px; }
.sl-steps li { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px 18px 20px; box-shadow: 0 14px 34px rgba(0,0,0,.05); }
.sl-steps li + li::before { content: "→"; position: absolute; left: -28px; top: 50%; transform: translateY(-50%); font-weight: 800; font-size: 22px; color: var(--c); }
.sl-steps li.in { border-color: color-mix(in srgb, var(--c) 45%, var(--line)); }
.sl-stepn { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; background: var(--c); color: #fff; font-weight: 800; margin-bottom: 10px; }
.sl-steps b { display: block; font-size: clamp(17px, 2vw, 22px); letter-spacing: -0.015em; line-height: 1.25; }
.sl-steps p { margin: 6px 0 0; color: var(--ink-2); font-size: clamp(15px, 1.7vw, 18px); line-height: 1.4; }
.sl-terms { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: 14px; }
.sl-card { position: relative; border: 0; padding: 0; background: none; cursor: pointer; perspective: 900px; min-height: 150px; font: inherit; color: inherit; text-align: left; }
.sl-card-in { position: absolute; inset: 0; transition: transform .6s cubic-bezier(.2,.8,.2,1); transform-style: preserve-3d; }
.sl-card.flip .sl-card-in { transform: rotateY(180deg); }
.sl-front, .sl-back { position: absolute; inset: 0; border-radius: 20px; padding: 18px; backface-visibility: hidden; -webkit-backface-visibility: hidden; display: flex; flex-direction: column; justify-content: center; }
.sl-front { background: var(--c); color: #fff; font-family: var(--head); font-size: clamp(20px, 2.4vw, 26px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; box-shadow: 0 14px 30px color-mix(in srgb, var(--c) 30%, transparent); }
.sl-front .sl-em { color: #fff; background: none; }
.sl-front small { font-family: var(--body, inherit); font-size: 12px; font-weight: 700; opacity: .8; margin-top: 8px; letter-spacing: 0; }
.sl-back { background: #fff; border: 1.5px solid color-mix(in srgb, var(--c) 40%, var(--line)); transform: rotateY(180deg); font-size: clamp(15px, 1.7vw, 18px); line-height: 1.4; overflow: auto; }
@media (max-width: 760px) {
  .sl-compare { grid-template-columns: minmax(0, 1fr); }
  .sl-vs { justify-self: center; }
  .sl-steps { grid-auto-flow: row; grid-auto-columns: auto; gap: 26px; }
  .sl-steps li + li::before { content: "↓"; left: 50%; top: -24px; transform: translateX(-50%); }
  .sl-card { min-height: 130px; }
}

/* ---------- owner dashboard ---------- */
.owner-link { display: flex; align-items: center; gap: 14px; text-decoration: none; color: inherit; border: 1.5px solid var(--ink); margin-bottom: 14px; }
.owner-link > span { display: grid; gap: 2px; flex: 1; }
.owner-link small { color: var(--ink-3); }
.own-updated { margin: 0 0 14px; font-size: 14px; }
.own-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr)); gap: 12px; margin: 8px 0 6px; }
.own-tile { border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px; display: grid; gap: 4px; background: #fff; }
.own-tile small { color: var(--ink-3); font-weight: 650; font-size: 13px; }
.own-tile b { font-size: 28px; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.own-tile span { color: var(--ink-2); font-size: 13px; line-height: 1.35; }
.own-bars { display: flex; align-items: flex-end; gap: 3px; height: 120px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.own-bars i { flex: 1; background: var(--brand); border-radius: 4px 4px 0 0; min-width: 3px; }
.own-axis { display: flex; justify-content: space-between; font-size: 12px; color: var(--ink-3); margin-top: 4px; }
.own-list { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 6px; }
.own-list li { display: flex; gap: 12px; align-items: baseline; border-bottom: 1px dashed var(--line); padding: 6px 0; }
.own-list li span { flex: 1; }
.own-list li small { color: var(--ink-3); }