/* Scoped entry theme. Approved r73 neutral navy/teal overrides. No host reset. */
.entry-surface{--design-primary:var(--ezp-brand);--design-background:#f7f7f5;--design-surface:#fff;--design-text:#20242c;--design-muted:#616872;--design-accent:#147d73;--design-danger:#b42318;--design-font:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;--design-radius:12px;--design-space:16px;font-family:var(--design-font);color:var(--design-text);background:var(--design-background);line-height:1.5;-webkit-font-smoothing:antialiased}
.entry-surface *{box-sizing:border-box}.entry-surface a{color:var(--design-primary)}.entry-surface button,.entry-surface input{font:inherit}.entry-surface button{cursor:pointer}.entry-surface button:disabled{cursor:default;opacity:.6}.entry-surface :focus-visible{outline:3px solid var(--design-accent);outline-offset:3px}.entry-surface h1:focus,.entry-surface h2:focus{outline:none}.entry-surface p{overflow-wrap:anywhere}.entry-surface .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:8px 16px;border-radius:10px;border:1px solid #d9dcea;background:#fff;color:var(--design-text);font:600 14px var(--design-font);text-decoration:none;text-align:center}.entry-surface .btn-primary{background:var(--design-primary);border-color:var(--design-primary);color:#fff;box-shadow:0 6px 16px rgb(39 52 73/.12)}.entry-surface .btn-ghost{border-color:transparent;background:transparent;color:var(--design-muted)}.entry-surface .btn:hover{border-color:#9ca7a4}.entry-surface .btn-primary:hover{background:#354760}.entry-surface .pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;background:#e7f4f2;color:var(--design-accent)}.entry-surface .pill.purple{background:#eef0ed;color:var(--design-primary)}.entry-surface .dx-wrap{max-width:1180px;margin:0 auto;padding:40px}.entry-surface .eyebrow{margin:0 0 10px;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--design-primary)}.entry-surface .dx-h1{font-size:46px;line-height:1.08;letter-spacing:-.035em;margin:0 0 18px;font-weight:800}.entry-surface .dx-lead{font-size:18px;line-height:1.6;color:#475069;margin:0;max-width:600px}.entry-surface .dx-muted{color:var(--design-muted);font-size:14.5px;line-height:1.55;margin:0}.entry-surface .dx-fine{color:var(--design-muted);font-size:13px;line-height:1.5;margin:14px 0 0;max-width:540px}.entry-surface .dx-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.entry-surface .dx-btn-lg{min-height:48px;padding:10px 22px;font-size:15px;border-radius:12px}
.entry-surface .dx-hero{background:radial-gradient(900px 380px at 85% 10%,#e8eaf0 0%,transparent 60%),linear-gradient(180deg,#f1f2f6 0%,var(--design-background) 100%);border-bottom:1px solid #e1e4df}.entry-surface .dx-hero-in{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding-top:56px;padding-bottom:56px}.entry-surface .dx-preview{margin:0;background:#fff;border:1px solid #dce1dc;border-radius:18px;box-shadow:0 30px 60px -20px rgb(39 52 73/.18),0 2px 6px rgb(24 34 56/.05);overflow:hidden;transform:rotate(.6deg)}.entry-surface .dx-pv-head{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid #eef0f6}.entry-surface .dx-pv-crumb{font-size:12.5px;color:var(--design-muted)}.entry-surface .dx-pv-body{display:grid;grid-template-columns:1.15fr 1fr}.entry-surface .dx-pv-q{padding:16px 18px;font-size:14px;line-height:1.6;border-right:1px solid #eef0f6}.entry-surface .dx-pv-q p{margin:0 0 10px}.entry-surface .dx-pv-ch{display:grid;grid-template-columns:1fr 1fr;gap:6px}.entry-surface .dx-pv-ch span{border:1.5px solid #dfe2ee;border-radius:9px;padding:5px 9px;font-size:13px;font-weight:600}.entry-surface .dx-pv-ch span.on{border-color:var(--design-primary);background:#f3f4f1;color:var(--design-primary)}.entry-surface .dx-pv-g{padding:10px;display:flex;flex-direction:column;gap:6px;background:#fbfbfd}.entry-surface .dx-pv-g svg{width:100%;height:auto;background:#fff;border:1px solid #eef0f6;border-radius:10px}.entry-surface .ezmark{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--design-muted)}.entry-surface .ezmark i{width:18px;height:18px;border-radius:5px;background:var(--design-accent);display:inline-block}.entry-surface .m{font-family:"Cambria Math","Times New Roman",serif;font-style:italic;font-size:1.12em}
.entry-surface .dx-sec-h{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.entry-surface .dx-sec-h h2{font-size:28px;letter-spacing:-.025em;margin:0}.entry-surface .dx-sec-h .dx-muted{max-width:380px;text-align:right}.entry-surface .dx-modes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.entry-surface .dx-mode{--c:var(--design-primary);--t:#eef0ed;display:flex;flex-direction:column;background:#fff;border:1px solid #e4e7f0;border-radius:16px;padding:24px 24px 20px;box-shadow:0 1px 2px rgb(24 34 56/.04)}.entry-surface .dx-mode.m-prac{--c:var(--design-accent);--t:#e7f4f2}.entry-surface .dx-mode.m-sat{--c:#141a2e;--t:#e8eaf2}.entry-surface .dx-mode-ic{width:44px;height:44px;border-radius:12px;background:var(--t);color:var(--c);display:grid;place-items:center;font-weight:800;font-size:18px;margin-bottom:16px}.entry-surface .m-sat .dx-mode-ic{font-size:12.5px}.entry-surface .dx-mode h3{margin:0 0 8px;font-size:19px;letter-spacing:-.01em}.entry-surface .dx-mode p{margin:0 0 14px;color:#475069;font-size:14.5px;line-height:1.55}.entry-surface .dx-mode ul{margin:0 0 18px;padding-left:16px;display:grid;gap:7px;font-size:13.5px;color:#3b4560}.entry-surface .dx-mode-go{margin-top:auto;font-weight:700;font-size:14.5px;text-decoration:none;color:var(--c)}.entry-surface .dx-mode-go:hover{text-decoration:underline}.entry-surface .dx-band{background:#141a2e;color:#d7dcec;margin-top:12px}.entry-surface .dx-band h2{color:#fff;font-size:28px;letter-spacing:-.025em;line-height:1.2;margin:0 0 10px}.entry-surface .dx-band .dx-muted{color:#aeb6cc}.entry-surface .dx-band-in{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:center;padding-top:48px;padding-bottom:48px}.entry-surface .dx-courses{display:grid;gap:12px}.entry-surface .dx-course{display:block;padding:18px 20px;border-radius:14px;background:rgb(255 255 255/.06);border:1px solid rgb(255 255 255/.12);text-decoration:none;color:#d7dcec}.entry-surface .dx-course:hover{background:rgb(255 255 255/.1)}.entry-surface .dx-course b{display:block;color:#fff;font-size:17px;margin-bottom:4px}.entry-surface .dx-course span{font-size:13.5px;line-height:1.5}.entry-surface .eza-foot{display:flex;flex-wrap:wrap;gap:20px;font-size:13px;padding-top:24px;margin-top:32px;border-top:1px solid #e4e7f0;color:var(--design-muted)}.entry-surface .eza-foot a{color:var(--design-muted);text-decoration:none}.entry-surface .dx-foot-r{margin-left:auto;font-size:12px}
.entry-auth-dialog{border:0;padding:0;border-radius:16px;width:min(440px,calc(100% - 32px));max-height:calc(100dvh - 32px);overflow:auto;background:var(--design-surface);color:var(--ezp-ink,#182238);box-shadow:0 30px 70px -20px rgb(24 34 56/.35),0 0 0 1px #e4e7f0}.entry-auth-dialog::backdrop,.entry-confirm::backdrop{background:rgb(24 34 56/.55)}.entry-surface .dx-auth{position:relative;padding:28px}.entry-surface .dx-auth h2{font:700 24px/1.25 var(--design-font);letter-spacing:-.02em;margin:0 48px 8px 0;color:var(--ezp-ink,#182238)}.entry-surface .dx-auth p{margin:0;color:#475069;font-size:14.5px;line-height:1.55}.entry-surface .dx-auth .dx-auth-note{margin-top:12px;padding:10px 12px;border-radius:10px;background:var(--ezp-brand-soft,#eef1ff);color:#2b3566;font-size:13.5px}.entry-surface .dx-x{position:absolute;right:16px;top:16px;width:36px;height:36px;padding:0;border-radius:10px;border:1px solid #e4e7f0;background:#fff;display:grid;place-items:center;color:#475069;font-size:20px;line-height:1}.entry-surface .dx-x:hover{background:#f6f7fb}.entry-surface .dx-auth>.btn{width:100%;min-height:46px;font-size:15px;border-radius:12px}.entry-surface .dx-auth>.dx-google{margin-top:20px}.entry-surface .dx-auth>.dx-google:disabled{border-style:dashed}.entry-surface .dx-or{display:flex;align-items:center;gap:12px;margin:14px 0;color:var(--design-muted);font-size:12.5px}.entry-surface .dx-or::before,.entry-surface .dx-or::after{content:"";flex:1;height:1px;background:#e4e7f0}.entry-surface .dx-auth .dx-small{margin-top:16px;font-size:12.5px;color:var(--design-muted)}.entry-surface .entry-auth-message:not(:empty){margin-top:14px;background:#fff7e6;color:#7a4b00;padding:12px;border-radius:10px;font-size:13px}.entry-confirm{border:1px solid #d9dcea;border-radius:16px;padding:28px;width:min(480px,calc(100% - 32px));max-height:calc(100dvh - 32px)}
.entry-surface .demo-wrap{max-width:1120px;margin:0 auto;padding:28px 24px 40px}.entry-surface .demo-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:18px}.entry-surface .demo-head h1{font-size:30px;letter-spacing:-.02em;margin:0 0 4px}.entry-surface .demo-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:20px;align-items:start}.entry-surface .demo-q{background:#fff;border:1px solid #e4e7f0;border-radius:16px;padding:24px 26px}.entry-surface .demo-side{display:grid;gap:14px}.entry-surface .demo-card{background:#fff;border:1px solid #e4e7f0;border-radius:14px;padding:18px 20px;font-size:13.5px;line-height:1.55;color:#3b4560}.entry-surface .demo-card h2{font-size:16px;margin:0 0 6px;color:var(--design-text)}.entry-surface .demo-prog{display:flex;gap:6px;flex-wrap:wrap;margin:14px 0 20px}.entry-surface .demo-prog button{width:32px;height:32px;border:0;border-radius:8px;display:grid;place-items:center;font-size:12px;font-weight:700;background:#eef0f6;color:#5b6479}.entry-surface .demo-prog .done{background:#e7f4f2;color:var(--design-accent)}.entry-surface .demo-prog .cur{background:var(--design-primary);color:#fff}.entry-surface .dx-demo{padding:4px 10px;border-radius:99px;background:#fff4dc;color:#8a5a00;font-size:12px;font-weight:800;text-transform:uppercase}.entry-surface .dx-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.entry-surface .dx-small{font-size:12.5px;color:var(--design-muted)}.entry-surface .entry-timer{white-space:nowrap;font-size:14px;font-variant-numeric:tabular-nums}.entry-surface .demo-q h2{font-size:18px;margin:14px 0}.entry-surface fieldset{border:0;padding:0;margin:20px 0 0;min-width:0}.entry-surface legend{font-weight:600;padding:0;margin-bottom:8px}.entry-surface .choices{display:grid;gap:10px}.entry-surface .choice{display:flex;align-items:center;gap:12px;padding:11px 14px;border:1.5px solid #dfe2ee;border-radius:12px;background:#fff;font-size:16px;cursor:pointer}.entry-surface .choice:has(:checked){border-color:var(--design-primary);background:#f3f4f1}.entry-surface .choice input{accent-color:var(--design-primary)}.entry-surface .choice .letter{font-weight:700}.entry-surface .entry-free input{display:block;width:100%;max-width:300px;padding:12px;border:1px solid #9ca7a4;border-radius:8px;margin-top:8px}.entry-surface .entry-question-image{display:block;width:100%;height:auto;max-height:900px;object-fit:contain;object-position:left top;margin-top:16px;background:#fff}.entry-surface .entry-transcript{font-size:13px;margin-top:12px;color:#475069}.entry-surface .entry-answer-status{min-height:24px;font-size:13px;color:var(--design-accent)}.entry-surface .demo-result{background:#fff;border:1px solid #e4e7f0;border-radius:16px;padding:24px 26px}.entry-surface .demo-result .big{font-size:48px;font-weight:800;letter-spacing:-.03em;line-height:1;margin:12px 0 4px}.entry-surface .demo-result .big small{font-size:20px;color:var(--design-muted);font-weight:600}.entry-surface .demo-result .row{display:grid;grid-template-columns:1fr auto;gap:12px;padding:10px 0;border-top:1px solid #eef0f6;font-size:14px}.entry-surface .entry-result-list{padding:0;list-style:none;margin-top:24px}.entry-surface .entry-result-list li{display:grid;grid-template-columns:1fr auto auto;gap:16px;align-items:center;padding:12px 0;border-top:1px solid #eef0f6;font-size:14px}.entry-surface .entry-correct{color:var(--design-accent)}.entry-surface .entry-incorrect{color:var(--design-danger)}
@media(max-width:1050px){.entry-surface .dx-hero-in{gap:24px}.entry-surface .dx-h1{font-size:38px}.entry-surface .dx-wrap{padding:32px 24px}.entry-surface .dx-modes{gap:12px}.entry-surface .dx-mode{padding:20px 16px}}
@media(max-width:700px){.entry-surface .dx-hero-in,.entry-surface .dx-band-in,.entry-surface .dx-modes,.entry-surface .demo-grid{grid-template-columns:1fr}.entry-surface .dx-h1{font-size:36px}.entry-surface .dx-hero-in{padding-top:36px;padding-bottom:36px}.entry-surface .dx-preview{transform:none}.entry-surface .dx-sec-h,.entry-surface .demo-head{align-items:flex-start;flex-direction:column;gap:12px}.entry-surface .dx-sec-h .dx-muted{text-align:left}.entry-surface .demo-wrap{padding:24px 16px}.entry-surface .demo-q,.entry-surface .demo-result{padding:20px 16px}.entry-surface .dx-auth{padding:24px 20px}.entry-surface .entry-result-list li{grid-template-columns:1fr auto;gap:8px}.entry-surface .entry-result-list li>.btn{grid-column:2;grid-row:1 / span 2}.entry-surface .entry-result-list li>strong{grid-column:1}.entry-surface .dx-foot-r{margin-left:0}.entry-surface .demo-side{order:2}}
.entry-surface .entry-transcript p{white-space:pre-line;font-size:16px;line-height:1.7}
/* Shared content blocks retain the existing demo shell and choice geometry. */
.entry-surface [data-media]{font-size:17px;line-height:1.7;overflow-wrap:anywhere}
.entry-surface .ezs-html p{margin:0 0 12px}
.entry-surface .ezs-choice-body{min-width:0;flex:1;overflow-wrap:anywhere;line-height:1.6}
.entry-surface .choice>input,.entry-surface .choice>.letter{flex:none}
.entry-surface .ezs-choice-body p{margin:0}
.entry-surface .ezs-figure{display:block;margin:8px 0}
.entry-surface .ezs-figure img{display:block;max-width:100%;height:auto}
.entry-surface .ezs-scroll{max-width:100%;overflow-x:auto}
.entry-surface .ezs-table{border-collapse:collapse}
.entry-surface .ezs-table td,.entry-surface .ezs-table th{border:1px solid #dfe2ee;padding:6px 10px}
.entry-surface .frac{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;line-height:1.15;margin:0 2px}
.entry-surface .frac .num{border-bottom:1.5px solid currentColor;padding:0 3px}
.entry-surface .frac .den{padding:0 3px}
.entry-surface .overline{text-decoration:overline}
.entry-surface .choice:focus-within{outline:2px solid var(--design-primary);outline-offset:3px}
.entry-surface .ezs-option-list{list-style:none;display:grid;gap:16px;margin:18px 0;padding:0}
.entry-surface .ezs-option{display:grid;grid-template-columns:24px minmax(0,1fr);gap:10px;font-size:17px;line-height:1.7}
.entry-surface .ezs-option-letter{font-weight:700}
.entry-surface .ezs-option .ezs-choice-body{display:block;overflow-x:auto}
.entry-surface .ezs-choice-text{white-space:pre-line}
.entry-surface .ezs-option .ezs-choice-body p{margin:0 0 10px}
.entry-surface .ezs-option .ezs-figure{display:block;max-width:100%;overflow-x:auto}
.entry-surface .ezs-option .ezs-figure img{max-width:none}

/* UX remediation: readable disabled controls, a clear answered marker and a review that names the key once. */
.entry-surface button:disabled,.entry-surface .btn:disabled{opacity:1;background:#eceef1;border-color:#d3d7dd;color:#4d5562}
.entry-surface .demo-prog button{position:relative;border:1.5px solid transparent}
.entry-surface .demo-prog .done{background:#e3f2ef;border-color:#147d73;color:#0d5c54}
.entry-surface .demo-prog .done::after{content:"";position:absolute;right:-3px;top:-3px;width:10px;height:10px;border-radius:50%;background:#147d73;border:2px solid #fff}
.entry-surface .demo-prog .cur{border-color:var(--design-primary)}
.entry-surface .demo-prog .cur.done::after{background:#5fd3c3}
.entry-surface .demo-card--workspace{padding:14px}
.entry-surface .demo-card h2+p+h2{margin-top:14px}
.entry-surface .choice.is-correct{border-color:#147d73;background:#eef8f6}
.entry-surface .choice.is-wrong{border-color:#b42318;background:#fdf3f2}
.entry-surface .choice-tag{margin-left:auto;flex:none;padding:2px 10px;border-radius:99px;font-size:12px;font-weight:700;line-height:1.6}
.entry-surface .is-correct>.choice-tag{background:#147d73;color:#fff}
.entry-surface .is-wrong>.choice-tag{background:#b42318;color:#fff}
.entry-surface .demo-outcome{display:inline-flex;margin:0 0 12px;padding:4px 12px;border-radius:99px;font-size:13px;font-weight:700}
.entry-surface .demo-outcome.is-correct{background:#e3f2ef;color:#0d5c54}
.entry-surface .demo-outcome.is-wrong{background:#fdecea;color:#8f1c13}
.entry-surface .demo-outcome.is-skipped{background:#eef0f6;color:#3b4560}
.entry-surface .demo-key{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0 0 16px}
.entry-surface .demo-key div{padding:10px 12px;border:1px solid #e4e7f0;border-radius:10px}
.entry-surface .demo-key dt{font-size:12px;color:var(--design-muted)}
.entry-surface .demo-key dd{margin:2px 0 0;font-size:20px;font-weight:800;color:var(--design-text)}
.entry-surface .demo-explanation{font-size:15px;line-height:1.65;color:#2a3349}

/* Review: question/choices left, the complete explanation right; stacked below 900px. */
.entry-surface .demo-review{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}
.entry-surface .demo-review-q h2{margin-top:16px}
.entry-surface .demo-verdict{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;padding:10px 14px;border:1px solid #e4e7f0;border-radius:12px;background:#fafbfc}
.entry-surface .demo-verdict .demo-outcome{margin:0}
.entry-surface .demo-verdict .demo-key{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0}
.entry-surface .demo-verdict .demo-key div{display:flex;align-items:baseline;gap:6px;padding:0;border:0}
.entry-surface .demo-verdict .demo-key dt{font-size:13px}
.entry-surface .demo-verdict .demo-key dd{margin:0;font-size:17px;overflow-wrap:anywhere}
.entry-surface .demo-explain{min-width:0;padding:22px 24px;font-size:16px;line-height:1.7;color:#2a3349;overflow-wrap:anywhere}
.entry-surface .demo-explain h2{font-size:20px;margin:0 0 12px}
.entry-surface .demo-explain .ezs-html p{margin:0 0 10px}
.entry-surface .demo-explain .ezs-html:has(>p>strong:only-child){margin-top:16px}
.entry-surface .demo-explain .ezs-html:first-of-type{margin-top:0}
.entry-surface .demo-explain .demo-explanation{font-size:16px;line-height:1.7;margin:0}
.entry-surface .demo-explain .entry-question-image{max-width:100%;max-height:none;margin-top:4px}
@media(max-width:900px){.entry-surface .demo-review{grid-template-columns:minmax(0,1fr)}}
@media(max-width:700px){.entry-surface .demo-explain{padding:20px 16px}}
/* Landing hero graph: expression rows and tick labels for the generated graph in hero-graph.ts. */
.entry-surface .dx-pv-ex{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.entry-surface .dx-pv-ex li{display:flex;align-items:center;gap:8px;padding:4px 8px;background:#fff;border:1px solid #eef0f6;border-radius:8px;font-size:13px;white-space:nowrap}
.entry-surface .dx-pv-ex i{width:10px;height:10px;border-radius:50%;flex:none}
.entry-surface .dx-pv-ex i.c1{background:#d64b3c}
.entry-surface .dx-pv-ex i.c2{background:#3b6fd8}
.entry-surface .dx-pv-ticks{font:600 10px var(--design-font);fill:#64748b;stroke:#fff;stroke-width:3px;paint-order:stroke;stroke-linejoin:round}
@media(max-width:560px){.entry-surface .dx-pv-body{grid-template-columns:minmax(0,1fr)}.entry-surface .dx-pv-q{border-right:0;border-bottom:1px solid #eef0f6}}
.entry-surface .dx-pv-q .m,.entry-surface .dx-pv-head .pill{white-space:nowrap}

.entry-surface .btn-primary:not(:disabled):hover{background:var(--ezp-brand-strong);border-color:var(--ezp-brand-strong)}
.entry-surface .pill.purple,.entry-surface .dx-pv-ch span.on{background:var(--ezp-brand-soft)}