:root{--ink:#17212b;--muted:#63717e;--paper:#f7f8f5;--card:#fff;--line:#dfe5df;--teal:#0e756c;--teal2:#dff3ef;--coral:#e36d4f;--coral2:#fff0eb;--navy:#18384f;--gold:#d5a72f;--shadow:0 18px 50px rgba(26,46,58,.10);--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,system-ui,sans-serif;line-height:1.6}button,input,select,textarea{font:inherit}a{color:var(--teal);text-decoration:none}.shell{max-width:1180px;margin:auto;padding-left:28px;padding-right:28px}
.top-progress{position:fixed;left:0;right:0;top:0;height:3px;z-index:90}.top-progress span{display:block;width:0;height:100%;background:var(--coral)}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px 28px;border-bottom:1px solid rgba(223,229,223,.9);background:rgba(247,248,245,.92);backdrop-filter:blur(14px)}
.brand{display:flex;gap:12px;align-items:center;color:var(--ink)}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--ink);color:#fff;font-weight:800}.brand strong,.brand small{display:block}.brand small{font-size:11px;color:var(--muted)}.topnav{display:flex;gap:18px}.topnav a{color:var(--ink);font-size:14px;font-weight:600}
.btn{border:0;border-radius:12px;padding:11px 16px;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.btn-primary,.btn.ink{background:var(--teal);color:#fff}.btn-secondary{background:var(--teal2);color:#07554f}.btn.outline{background:transparent;border:1px solid var(--line);color:var(--ink)}.btn.text{background:transparent;color:var(--teal);padding-left:0}
.hero{min-height:610px;display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;padding-top:70px;padding-bottom:70px}.eyebrow,.section-title>span,.section-label{font-size:12px;letter-spacing:.14em;font-weight:800;color:var(--teal)}h1,h2{font-family:Newsreader,Georgia,serif}.hero h1{font-size:56px;line-height:1.04;margin:14px 0 22px}.hero h1 span{color:var(--teal)}.lead{font-size:19px;color:#44515c;max-width:680px}.hero-actions{display:flex;gap:12px;margin:28px 0}.schedule-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:36px}.schedule-strip div{border-top:3px solid var(--teal);padding-top:10px}.schedule-strip strong,.schedule-strip span{display:block}.schedule-strip span{font-size:12px;color:var(--muted);margin-top:4px}
.concept-map-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;min-height:430px;display:flex;flex-direction:column;justify-content:center}.cm-kicker{font-size:10px;letter-spacing:.14em;font-weight:800;color:var(--coral);margin-bottom:14px}.cm-node{background:#f2f6f4;border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center;font-weight:800;color:var(--navy);flex:1}.cm-node small{display:block;font-size:10px;font-weight:600;color:var(--muted);margin-top:4px}.cm-node.primary{background:var(--ink);color:#fff;font-size:22px}.cm-node.wide{background:var(--teal2);color:#07554f}.cm-row{display:flex;align-items:center;gap:10px;margin:10px 0}.cm-row>span,.cm-arrow{text-align:center;color:var(--teal);font-weight:800}.cm-arrow{font-size:22px}
.section{padding-top:76px;padding-bottom:76px}.section-title{margin-bottom:28px}.section-title h2{font-size:38px;line-height:1.12;margin:7px 0}.section-title p{color:var(--muted);max-width:800px}
.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.method-grid article,.check-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.method-grid article b,.check-card>b{font-size:11px;color:var(--teal)}.method-grid h3,.check-card h3{font-size:21px;margin:10px 0}.method-grid p,.check-card p{font-size:14px;color:var(--muted)}
.legacy-activity{background:linear-gradient(135deg,#eef7f3,#fff);border-radius:26px}.activity-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.activity-strip div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}.activity-strip strong,.activity-strip span{display:block}.activity-strip span{font-size:12px;color:var(--muted);margin-top:4px}.source-note{margin-top:16px}.source-note summary{cursor:pointer;color:var(--teal);font-weight:800;font-size:12px}
.module-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.module-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:0;overflow:hidden;display:flex;flex-direction:column;min-height:320px}.module-card .module-no{font-size:11px;font-weight:800;letter-spacing:.12em;color:var(--teal);padding:22px 22px 0}.module-card h3{font-size:26px;margin:10px 22px 8px}.module-card .module-time{font-size:11px;font-weight:800;color:var(--coral);margin:0 22px 10px}.module-card p{font-size:14px;color:var(--muted);padding:0 22px;flex:1}.card-actions{margin-top:auto;border-top:1px solid var(--line);padding:14px 22px;display:flex;align-items:center;gap:8px}.points{font-weight:800;color:var(--teal);font-size:12px;margin-left:auto}
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.check-card{display:flex;flex-direction:column}.check-card .btn{margin-top:auto;align-self:flex-start}
.helper{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;max-width:880px}.helper-bar{display:flex;justify-content:space-between;align-items:center}.helper select{border:1px solid #ccd5d2;border-radius:10px;padding:9px}.prompt-row{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.prompt-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 12px;cursor:pointer;font-weight:700;font-size:12px}.chat-log{min-height:180px;max-height:340px;overflow:auto;background:#f7f9f7;border:1px solid var(--line);border-radius:14px;padding:14px}.msg{max-width:82%;padding:10px 12px;margin:7px 0;border-radius:12px;font-size:13px}.msg.bot{background:var(--teal2);color:#294c48}.msg.user{background:#edf2fa;margin-left:auto}.chat-form{display:flex;gap:8px;margin-top:10px}.chat-form input{flex:1;border:1px solid #ccd5d2;border-radius:10px;padding:11px 12px}
.score-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:24px 0}.score-card{background:#f3f6f4;border-radius:14px;padding:16px;text-align:center}.score-card strong{display:block;font-size:24px}.score-card span{font-size:11px;color:var(--muted)}.final-question{background:linear-gradient(135deg,#fff0eb,#fff);border-radius:26px;margin-bottom:40px}
footer{background:var(--ink);color:#fff;padding:40px 0;margin-top:50px}.footer-grid{display:grid;grid-template-columns:1.2fr .6fr 1fr;gap:30px}.footer-grid p,.footer-grid small{color:#bdcbd3}.footer-grid a{color:#b9ede7}

.reader-dialog{border:0;background:transparent;width:min(1180px,97vw);max-width:none;padding:0}.reader-dialog::backdrop{background:rgba(14,24,31,.72);backdrop-filter:blur(5px)}.reader-shell{display:grid;grid-template-columns:220px minmax(0,1fr);background:#fff;border-radius:22px;box-shadow:0 30px 100px rgba(0,0,0,.25);max-height:92vh;overflow:hidden}.reader-nav{background:#f7f9f7;border-right:1px solid var(--line);padding:26px 18px;overflow:auto;position:relative}.reader-close{position:absolute;right:12px;top:10px;border:0;background:transparent;font-size:27px;cursor:pointer}.reader-brand{font-size:11px;letter-spacing:.12em;font-weight:800;margin-bottom:26px}.reader-brand small{display:block;color:var(--muted);font-size:9px;margin-top:6px}.reader-nav nav{display:grid;gap:5px}.reader-link{display:grid;grid-template-columns:28px 1fr;gap:8px;padding:9px 8px;border-radius:10px;color:var(--muted);font-size:11px}.reader-link.active{background:var(--teal2);color:#07554f}.reader-link b{font-size:9px}.reader-link small{display:block;font-size:9px}.reader-time{font-size:10px;color:var(--muted);margin-top:28px}.reader-time b{color:var(--coral)}.reader-content{overflow:auto;padding:34px;max-height:92vh}.reader-phase{padding:26px 0 48px;border-bottom:1px solid var(--line);scroll-margin-top:10px}.phase-head{display:flex;justify-content:space-between;gap:20px}.phase-eyebrow{font-size:11px;letter-spacing:.14em;font-weight:800;color:var(--teal)}.phase-time{font-size:11px;color:var(--coral);font-weight:800}.reader-phase h1{font-family:Newsreader,Georgia,serif;font-size:42px;line-height:1.08;margin:9px 0 18px}.reader-phase h2{font-size:29px;margin:28px 0 10px}.reader-phase h3{font-size:21px;margin:22px 0 8px}.reader-phase p{color:#44515c;font-size:14px}.reader-phase .lead{font-size:17px}
.callout{border-radius:14px;padding:16px 18px;margin:15px 0;background:#f3f6f4}.callout.teal{background:var(--teal2);border-left:4px solid var(--teal)}.callout.red{background:var(--coral2);border-left:4px solid var(--coral)}.callout.gold{background:#fff5e5;border-left:4px solid var(--gold)}.callout-label{font-size:10px;font-weight:800;letter-spacing:.09em;color:var(--teal)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px}.compare-card{background:#f7f9f7;border:1px solid var(--line);border-radius:14px;padding:15px}.compare-card.teal{border-left:4px solid var(--teal)}.compare-card.red{border-left:4px solid var(--coral)}.compare-card.gold{border-left:4px solid var(--gold)}
.discipline-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.discipline{background:#f7f9f7;border-radius:12px;padding:14px}.discipline b{display:block;color:var(--navy)}
.timeline{display:grid;gap:10px}.timeline-item{display:grid;grid-template-columns:120px 1fr;gap:16px;background:#f7f9f7;border-radius:12px;padding:13px}.timeline-item b{color:var(--teal)}
.task-list{counter-reset:task;display:grid;gap:10px}.task-step{counter-increment:task;display:grid;grid-template-columns:30px 1fr;gap:12px;background:#f7f9f7;border-radius:12px;padding:12px}.task-step:before{content:counter(task);display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--teal);color:#fff;font-size:11px;font-weight:800}
.deck-notes,.legacy-notes{margin-top:18px;border:1px solid var(--line);border-radius:14px;padding:14px;background:#fff}.deck-notes summary,.legacy-notes summary{cursor:pointer;font-weight:800;color:var(--teal);font-size:12px}.deck-slide{padding:12px 0;border-bottom:1px dashed var(--line)}.deck-slide:last-child{border-bottom:0}.deck-slide b{font-size:13px}.deck-slide p{font-size:12px;color:var(--muted);white-space:pre-line}.inline-practice{margin-top:20px}

.activity-dialog,.wide-dialog{border:0;background:transparent;width:min(850px,95vw);max-width:none;padding:0}.wide-dialog{width:min(960px,96vw)}.activity-dialog::backdrop,.wide-dialog::backdrop{background:rgba(14,24,31,.72);backdrop-filter:blur(5px)}#activityBody,#checkBody{position:relative;background:#fff;border-radius:22px;padding:30px;box-shadow:0 30px 100px rgba(0,0,0,.25);max-height:90vh;overflow:auto}.modal-close{position:absolute;right:18px;top:12px;border:0;background:transparent;font-size:28px;cursor:pointer}.question{padding:15px 0;border-bottom:1px solid var(--line)}.question label{display:flex;gap:10px;align-items:flex-start;margin:8px 0;padding:9px 11px;border:1px solid #dce2df;border-radius:10px;background:#fff;cursor:pointer}.question textarea{width:100%;min-height:110px;border:1px solid #ccd5d2;border-radius:10px;padding:11px;margin-top:10px}.result-box{margin-top:16px;padding:14px;border-radius:12px;background:var(--teal2)}.result-box>strong{font-size:24px}.answer-details{margin-top:10px;background:#fff5e5;border-left:4px solid var(--gold);border-radius:12px;padding:12px}
.toast{position:fixed;right:20px;bottom:20px;z-index:99;background:var(--ink);color:#fff;padding:13px 16px;border-radius:12px;opacity:0;transform:translateY(8px);transition:.2s}.toast.show{opacity:1;transform:none}
@media(max-width:900px){.topnav a{display:none}.hero{grid-template-columns:1fr;padding-top:45px}.hero-visual{order:-1}.hero h1{font-size:43px}.method-grid,.module-grid,.check-grid{grid-template-columns:1fr}.activity-strip{grid-template-columns:1fr 1fr}.reader-shell{grid-template-columns:1fr}.reader-nav{max-height:190px;border-right:0;border-bottom:1px solid var(--line)}.reader-nav nav{display:flex;overflow:auto}.reader-link{min-width:150px}.reader-brand,.reader-time{display:none}.reader-content{padding:24px}.two-col,.discipline-grid{grid-template-columns:1fr}.score-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}}
@media(max-width:580px){.shell{padding-left:18px;padding-right:18px}.topbar{padding:10px 16px}.hero h1{font-size:37px}.hero-actions{flex-direction:column}.schedule-strip,.activity-strip{grid-template-columns:1fr}.score-grid{grid-template-columns:1fr}.reader-phase h1{font-size:34px}.reader-content{padding:18px}.cm-row{flex-direction:column}.cm-row>span{transform:rotate(90deg)}}