.pilot-top{display:flex;gap:12px;align-items:center;flex-wrap:wrap;background:#eaf3fb;border:1px solid #bfd5e8;padding:12px 14px;border-radius:14px;margin:14px 0}.pilot-top label{font-weight:800}.pilot-top input{padding:9px 11px;border:1px solid #aebdca;border-radius:9px;max-width:180px}.pilot-save{padding:9px 12px;border:0;border-radius:9px;background:#1d5f8f;color:#fff;font-weight:800;cursor:pointer}.pilot-status{font-size:13px;color:#527087}.slide-deck{background:#fff;border:1px solid #d2dde6;border-radius:18px;overflow:hidden;box-shadow:0 12px 34px #15334d16;margin:18px 0}.slide-head{display:flex;justify-content:space-between;align-items:center;background:#173f64;color:#fff;padding:11px 16px;font-weight:800}.slide-stage{min-height:390px;padding:30px clamp(22px,5vw,58px);display:flex;flex-direction:column;justify-content:center;background:linear-gradient(145deg,#fff,#f6f9fc)}.slide-stage h3{font-size:clamp(24px,3vw,34px);margin:0 0 18px;color:#163d60}.slide-kicker{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:#5b7690;font-weight:800;margin-bottom:8px}.slide-stage p,.slide-stage li{font-size:18px;line-height:1.65}.slide-stage ul{margin:8px 0 0 20px}.slide-callout{background:#e9f4ff;border-left:5px solid #2e78aa;padding:14px 16px;border-radius:10px;margin-top:18px}.slide-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.slide-card{background:#fff;border:1px solid #d8e3ec;border-radius:12px;padding:16px}.slide-foot{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:12px 16px;border-top:1px solid #e1e8ee}.slide-foot button{padding:10px 14px;border:0;border-radius:9px;background:#2b6d9d;color:#fff;font-weight:800;cursor:pointer}.slide-foot button:disabled{opacity:.35;cursor:not-allowed}.slide-dots{display:flex;gap:7px;justify-content:center;flex-wrap:wrap}.slide-dot{width:10px;height:10px;border-radius:50%;background:#c4d0da;cursor:pointer}.slide-dot.active{background:#ef7b22;transform:scale(1.25)}.pilot-section{background:#fff;border:1px solid #d7e1e9;border-radius:16px;padding:18px;margin:18px 0}.pilot-section h3{margin-top:0}.auto-ex{border-top:1px solid #e5ebf0;padding:18px 0}.auto-ex:first-of-type{border-top:0}.auto-ex textarea{width:100%;min-height:110px;box-sizing:border-box;border:1px solid #b9c8d5;border-radius:10px;padding:12px;font:inherit;line-height:1.5}.grade-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px}.grade-btn{padding:10px 14px;border:0;border-radius:9px;background:#237746;color:#fff;font-weight:800;cursor:pointer}.example-btn{padding:10px 14px;border:1px solid #8ea7ba;border-radius:9px;background:#fff;color:#244b69;font-weight:700;cursor:pointer}.auto-feedback{margin-top:12px;padding:12px 14px;border-radius:10px;background:#f1f5f8}.auto-feedback.good{background:#e9f7ef;border:1px solid #9bd0af}.auto-feedback.mid{background:#fff7e5;border:1px solid #e3c574}.auto-feedback.low{background:#fff0f0;border:1px solid #e4a3a3}.score-pill{font-weight:900;font-size:18px}.pilot-quiz .quiz-card{margin:12px 0;padding:14px;border:1px solid #dce5ed;border-radius:12px}.pilot-quiz label{display:block;margin:8px 0}.teacher-link{margin-left:auto;text-decoration:none;background:#5e3f87;color:#fff;padding:9px 12px;border-radius:9px;font-weight:800}.pilot-final{font-size:20px;font-weight:900;margin-top:14px}.progressbar{height:8px;background:#dce6ee;border-radius:999px;overflow:hidden;margin-top:8px}.progressbar>span{display:block;height:100%;background:#ef7b22}.mini-check{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.mini-check button{padding:9px 11px;border:1px solid #9db2c3;background:#fff;border-radius:9px;cursor:pointer}.mini-result{margin-top:10px;font-weight:800}@media(max-width:700px){.slide-stage{min-height:430px;padding:22px 18px}.slide-stage p,.slide-stage li{font-size:16px}.slide-grid{grid-template-columns:1fr}.slide-foot{grid-template-columns:1fr 1fr}.slide-dots{grid-column:1/-1;grid-row:1}.teacher-link{margin-left:0}}
.pilot-mode-tabs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:14px 0}.pilot-mode-tabs>button{border:1px solid #b8cad9;background:#fff;color:#214c6d;padding:10px 14px;border-radius:10px;font-weight:850;cursor:pointer}.pilot-mode-tabs>button.active{background:#173f64;color:#fff;border-color:#173f64}.pilot-login{display:grid;grid-template-columns:minmax(220px,1fr) minmax(360px,2fr);gap:18px;align-items:center;background:#eef6fc;border:1px solid #c5dbea;border-radius:15px;padding:16px;margin:12px 0}.pilot-login h3{margin:0 0 5px}.pilot-login p{margin:0;color:#506d84}.pair-fields{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;align-items:end}.pair-fields label,.home-field label{font-weight:800;font-size:13px}.pair-fields input,.home-field input{display:block;width:100%;margin-top:5px;padding:10px;border:1px solid #b8c8d5;border-radius:9px;font:inherit}.home-field{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end}.pilot-status{grid-column:1/-1}.success-text{color:#197143;font-weight:800}.error-text{color:#a32c2c;font-weight:800}.student-lanes{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}.student-lane{border:1px solid #d0dce6;border-radius:16px;overflow:hidden;background:#fbfdff;box-shadow:0 8px 24px #15334d0c}.lane-placeholder{min-height:160px;display:grid;place-items:center;border:2px dashed #cad6df;border-radius:15px;color:#6f8294;padding:20px;text-align:center}.lane-head{display:flex;justify-content:space-between;align-items:start;gap:12px;padding:16px;background:#173f64;color:#fff}.lane-head h3{margin:5px 0 0}.variant-badge{display:inline-block;background:#ef7b22;color:#fff;font-weight:900;border-radius:999px;padding:4px 9px;font-size:12px}.lane-grade{text-align:right}.lane-grade span{display:block;font-size:12px;opacity:.8}.lane-grade b{font-size:22px}.student-progress{padding:13px 16px;background:#f1f6fa;border-bottom:1px solid #dce5ec}.progress-dates{display:flex;gap:10px;flex-wrap:wrap;color:#647b8e;font-size:12px;margin-top:7px}.lane-exercises,.lane-quiz{padding:0 16px 12px}.student-lane .auto-ex textarea{min-height:95px}.student-lane .auto-ex p{font-size:15px;line-height:1.5}.student-lane .quiz-card{padding:12px;border:1px solid #dce5ed;border-radius:10px;margin:10px 0}.student-lane .quiz-card label{display:block;margin:7px 0;font-size:14px}.homework-notice{background:#fff9e8;border:1px solid #edd393;border-radius:10px;padding:10px 12px;margin:12px 0}.home-summary{display:grid;grid-template-columns:repeat(4,minmax(130px,1fr));gap:10px;background:#fff;border:1px solid #d8e3eb;border-radius:15px;padding:14px;margin:16px 0}.home-summary>div{padding:10px;background:#f7fafc;border-radius:10px}.home-summary h3{margin:5px 0}.home-summary b,.home-summary span{display:block;font-size:12px;color:#60778a}.home-summary strong{display:block;font-size:22px;color:#1a527b;margin-top:4px}.homework-head{display:flex;justify-content:space-between;gap:14px;align-items:start}.home-grade{text-align:right;background:#eef6fc;border-radius:10px;padding:10px 12px}.home-grade b{display:block;font-size:23px}.late-warning{background:#fff0f0;border:1px solid #e6a6a6;color:#8e2525;border-radius:10px;padding:11px 13px;margin:12px 0}.homework-locked{background:#f3f6f8;border:1px dashed #bdcad4;padding:20px;border-radius:12px;color:#617789}.submission-status{margin-top:12px;font-weight:900}.submission-status.late{color:#aa2929}.submission-status.ontime{color:#147443}.example-answer{font-size:14px}
@media(max-width:980px){.student-lanes{grid-template-columns:1fr}.pilot-login{grid-template-columns:1fr}.pair-fields{grid-template-columns:1fr 1fr}.pair-fields .pilot-save{grid-column:1/-1}.home-summary{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.pair-fields,.home-field,.home-summary{grid-template-columns:1fr}.homework-head{display:block}.home-grade{text-align:left;margin-top:10px}}

/* Lessons 1–2 full pilot */
.lesson-stage-tabs{position:sticky;top:0;z-index:8;background:#f4f8fb;padding:10px;border:1px solid #d8e4ec;border-radius:13px}
.compact-login{margin-top:10px}.student-count-switch{display:flex;gap:8px;margin-bottom:10px}.student-count-switch button{border:1px solid #9eb6c8;background:#fff;color:#214c6d;border-radius:999px;padding:8px 14px;font-weight:850;cursor:pointer}.student-count-switch button.active{background:#ef7b22;color:#fff;border-color:#ef7b22}.pair-fields.one-student{grid-template-columns:minmax(220px,1fr) auto}.pair-fields.one-student #student2Label{display:none}
.hero-question{display:grid;grid-template-columns:70px 1fr;gap:18px;align-items:center;background:linear-gradient(135deg,#eef6ff,#fff8ee);border:1px solid #d8e5ee;border-radius:18px;padding:22px}.hero-question>span{font-size:48px;text-align:center}.hero-question p{font-size:23px!important;font-weight:800;line-height:1.45;margin:0;color:#183d5f}
.concept-row,.three-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:12px 0}.concept-row>div,.three-columns>div{background:#fff;border:1px solid #d7e3ec;border-radius:15px;padding:18px;text-align:center;font-size:24px;box-shadow:0 6px 18px #14324c0a}.concept-row b,.three-columns b{display:block;font-size:16px;margin-top:8px;color:#183d5f}.three-columns p{font-size:15px!important;margin:8px 0 0}.compare-board{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center}.compare-board>div:not(.bridge-arrow){background:#fff;border:1px solid #d8e4ec;border-radius:17px;padding:20px;text-align:center;min-height:155px;display:flex;flex-direction:column;justify-content:center}.compare-board span{font-size:38px}.compare-board h4{font-size:20px;margin:8px 0}.compare-board p{font-size:16px!important;margin:0}.compare-board.small>div:not(.bridge-arrow){min-height:120px}.bridge-arrow{font-weight:900;font-size:28px;color:#ef7b22;text-align:center}
.process-strip{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;margin:20px 0}.process-strip span{background:#173f64;color:#fff;border-radius:14px;padding:14px 18px;font-weight:850;box-shadow:0 8px 18px #173f6422}.process-strip b{font-size:24px;color:#ef7b22}.process-strip.four span{background:#1f668f}.process-strip.visual span{min-width:120px;text-align:center}
.icon-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:16px 0}.icon-grid.three{grid-template-columns:repeat(3,1fr)}.icon-grid>div{background:#fff;border:1px solid #d7e3ec;border-radius:16px;padding:18px;font-size:28px}.icon-grid b,.icon-grid small{display:block;font-size:16px;margin-top:8px}.icon-grid small{font-weight:500;color:#5d7386}
.system-map,.decompose-map{position:relative;display:grid;grid-template-columns:repeat(2,minmax(160px,1fr));gap:12px;max-width:720px;margin:10px auto}.system-map>div,.decompose-map>div{background:#f5f9fc;border:1px solid #cfdee9;border-radius:14px;padding:15px;text-align:center;font-weight:800}.system-map .core,.decompose-map .core{grid-column:1/-1;background:#173f64;color:#fff;font-size:20px}.system-map .core b,.decompose-map .core b{display:block;margin-top:5px}.recap-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.recap-grid>div{display:flex;gap:12px;align-items:center;background:#fff;border:1px solid #d9e5ed;border-radius:14px;padding:15px}.recap-grid b{display:grid;place-items:center;min-width:32px;height:32px;border-radius:50%;background:#ef7b22;color:#fff}.problem-anatomy{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:12px;align-items:center;margin:18px 0}.problem-anatomy>div:not(.arrow){background:#fff;border:1px solid #d6e2ea;border-radius:16px;padding:18px;text-align:center;min-height:140px;display:flex;flex-direction:column;justify-content:center}.problem-anatomy span{font-size:38px}.problem-anatomy b,.problem-anatomy small{display:block;margin-top:7px}.problem-anatomy small{font-size:13px;color:#60778a}.problem-anatomy .arrow{font-size:28px;color:#ef7b22;font-weight:900}.decision-tree .root{max-width:560px;margin:0 auto;background:#173f64;color:#fff;padding:18px;border-radius:14px;text-align:center;font-weight:850;font-size:18px}.decision-tree .branches{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}.decision-tree .branches>div{padding:18px;border-radius:14px;text-align:center;font-weight:800}.decision-tree .yes{background:#e8f7ee;border:1px solid #98d0ad;color:#17673e}.decision-tree .no{background:#fff0f0;border:1px solid #e3aaaa;color:#912c2c}.case-board{background:#fff;border:1px solid #d5e2eb;border-radius:18px;padding:20px;max-width:720px;margin:0 auto}.case-board h4{font-size:24px;margin:0 0 12px}.case-board>div{padding:10px;border-top:1px solid #edf2f5}.warning-box{background:#fff4e8;border:1px solid #efc594;color:#7a4d18;padding:14px;border-radius:12px;margin-top:16px}.checklist-visual{display:grid;grid-template-columns:1fr 1fr;gap:12px}.checklist-visual>div{background:#eaf6ef;border:1px solid #afd6bd;border-radius:12px;padding:14px;font-weight:750;color:#205f3c}
.guided-deck{border:2px solid #cfddeb}.guided-stage{min-height:430px}.guided-actions{display:flex;gap:10px;padding:12px 16px;background:#f4f8fb;border-top:1px solid #dce6ed}.guided-actions button{border:1px solid #95aec0;background:#fff;color:#244d6a;border-radius:10px;padding:10px 14px;font-weight:850;cursor:pointer}.guided-actions button:first-child{background:#1e668f;color:#fff;border-color:#1e668f}.guided-actions button:disabled{opacity:.45;cursor:not-allowed}.guided-reveal-list{display:grid;gap:9px;margin-top:18px}.revealed-step{display:grid;grid-template-columns:90px 1fr;gap:12px;align-items:center;background:#f0f6fa;border-left:4px solid #2b78a8;border-radius:9px;padding:10px 12px}.revealed-step b{color:#245c82}.teacher-hint{color:#718395;font-style:italic;background:#f7f9fb;border:1px dashed #cbd7df;border-radius:10px;padding:12px}.guided-solution{margin-top:14px;background:#e9f7ef;border:1px solid #9bd0af;border-radius:12px;padding:14px}.guided-solution p{font-size:16px!important;margin:7px 0 0}.teacher-task{width:100%}.task-prompt{background:#eef6fc;border:1px solid #c8dce9;border-radius:13px;padding:14px;margin-bottom:14px;font-size:17px}
.evaluation-shell{padding:0;overflow:hidden}.evaluation-intro{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:18px;background:#f6f9fc;border-bottom:1px solid #dce6ed}.evaluation-intro h3{margin:0 0 5px}.evaluation-intro p{margin:0;color:#5b7286}.evaluation-badge{background:#173f64;color:#fff;border-radius:13px;padding:10px 14px;white-space:nowrap}.evaluation-badge b{font-size:25px}.evaluation-shell .homework-notice{margin:14px 16px}.evaluation-shell .student-lanes{padding:0 16px 18px}.student-lanes.single{grid-template-columns:minmax(0,900px);justify-content:center}.student-lanes.single .student-lane{width:100%}.assessment-slide-head{display:flex;justify-content:space-between;gap:12px;padding:12px 16px;background:#eaf2f7;border-bottom:1px solid #dce6ed;color:#214b69}.assessment-slide{padding:18px;min-height:340px}.assessment-slide textarea,.homework-stage textarea{width:100%;min-height:150px;border:1px solid #b6c8d6;border-radius:12px;padding:13px;font:inherit;line-height:1.5;resize:vertical;box-sizing:border-box}.assessment-prompt{display:grid;grid-template-columns:44px 1fr;gap:12px;align-items:start;background:#fff8ea;border:1px solid #ecd19a;border-radius:13px;padding:13px;margin-bottom:14px}.assessment-prompt>span{font-size:28px}.assessment-prompt p{margin:0;line-height:1.55}.assessment-nav{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;padding:12px 16px;border-top:1px solid #e1e8ee;background:#fbfdff}.assessment-nav>button{border:0;background:#2a6c9b;color:#fff;border-radius:9px;padding:9px 12px;font-weight:800;cursor:pointer}.assessment-nav>button:disabled{opacity:.35}.qfeedback.good{color:#187045;font-weight:800}.qfeedback.low{color:#a72b2b;font-weight:800}
.homework-deck{margin-top:16px}.homework-stage{min-height:430px;display:block}.homework-slide-top{display:flex;justify-content:space-between;gap:14px;align-items:start}.deadline-chip{background:#e8f6ee;color:#176c42;border:1px solid #a8d2b8;border-radius:999px;padding:8px 12px;font-size:13px;font-weight:850}.deadline-chip.late{background:#fff0f0;color:#9d2b2b;border-color:#e3abab}
@media(max-width:850px){.concept-row,.three-columns,.icon-grid.three,.recap-grid,.checklist-visual{grid-template-columns:1fr}.compare-board{grid-template-columns:1fr}.bridge-arrow{transform:rotate(90deg)}.problem-anatomy{grid-template-columns:1fr}.problem-anatomy .arrow{transform:rotate(90deg)}.decision-tree .branches{grid-template-columns:1fr}.evaluation-intro{display:block}.evaluation-badge{display:inline-block;margin-top:10px}.assessment-nav{grid-template-columns:1fr 1fr}.assessment-nav .slide-dots{grid-column:1/-1;grid-row:1}.homework-slide-top{display:block}.deadline-chip{display:inline-block;margin-top:8px}}
.source-link{display:inline-flex;align-items:center;gap:5px;margin:9px 0;padding:7px 10px;border-radius:8px;background:#eef7ff;border:1px solid #c8dff0;color:#1d587f;text-decoration:none;font-size:12px;font-weight:800}.source-link:hover{text-decoration:underline}.lesson-coverage{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:8px 0 14px;padding:11px 13px;border:1px solid #d4e3ed;border-radius:12px;background:#f5f9fc;color:#315970}.lesson-coverage span{font-size:13px}
.guided-prompt{background:linear-gradient(135deg,#fff8ea,#fff);border:1px solid #ecd19a;border-radius:14px;padding:14px 16px;margin:0 0 16px}.guided-prompt>b{display:block;color:#7a4d18;margin-bottom:5px}.guided-prompt p{font-size:17px!important;line-height:1.55;margin:0}.guided-why{margin-top:12px;padding:12px 14px;background:#f4f1ff;border:1px solid #cfc5ef;border-radius:10px}.guided-why>b{color:#5b3b8f}.guided-why p{margin:5px 0 0!important}.guided-mini-grid{display:grid;grid-template-columns:repeat(2,minmax(150px,1fr));gap:10px;margin:14px 0}.guided-mini-grid>div{background:#fff;border:1px solid #d5e2eb;border-radius:12px;padding:12px;text-align:center;font-weight:750}.hierarchy-board{display:grid;gap:8px;margin:14px 0}.hierarchy-board>div{border-radius:10px;padding:10px 12px}.hierarchy-board .h0{background:#173f64;color:#fff;font-weight:900;text-align:center;font-size:19px}.hierarchy-board .h1{background:#eaf3fb;border-left:5px solid #2c76a5;font-weight:850}.hierarchy-board .h2{margin-left:24px;background:#f7fafc;border-left:4px solid #70a1c1}.hierarchy-board .h3{margin-left:48px;background:#fff;border:1px dashed #aac1d2}.guided-solution{font-size:15px}.guided-solution>p{font-size:16px!important;line-height:1.6}@media(max-width:700px){.guided-mini-grid{grid-template-columns:1fr}.hierarchy-board .h2{margin-left:12px}.hierarchy-board .h3{margin-left:24px}}

/* Visual guided solutions — lessons 1–3 */
.guided-visual-canvas{margin:6px 0 12px;padding:16px;border:1px solid #d7e3ec;border-radius:16px;background:linear-gradient(145deg,#fbfdff,#f5f9fc);overflow:auto}
.visual-solution{min-height:190px;display:flex;flex-direction:column;justify-content:center;gap:14px;animation:visualReveal .24s ease-out}
@keyframes visualReveal{from{opacity:.35;transform:translateY(4px)}to{opacity:1;transform:none}}
.visual-card{background:#fff;border:2px solid #d6e2eb;border-radius:14px;padding:12px 14px;text-align:center;min-width:120px;box-shadow:0 5px 14px #173f640c}
.visual-card>span{display:block;font-size:27px}.visual-card>b{display:block;margin-top:5px;font-size:14px;color:#183d5f}.visual-card.pending{opacity:.45;border-style:dashed}
.is-correct{border-color:#75bd91!important;background:#eaf8ef!important;color:#145f39!important}.active{border-color:#ef9b4b!important;box-shadow:0 0 0 3px #ef9b4b2b!important;background:#fff8ec!important}
.solution-complete{border:2px solid #94cfaa;border-radius:16px;padding:14px;background:#f6fcf8}.solution-badge{align-self:center;background:#197044;color:#fff;padding:8px 13px;border-radius:999px;font-weight:900;text-align:center}
.criteria-banner{padding:10px 13px;border-radius:11px;background:#eef6fc;border:1px solid #c9dce9;text-align:center;color:#315970}
.unsorted-tray,.choice-cloud,.route-board,.clarify-grid{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.two-zones,.three-category-board,.axis-board,.hierarchy-columns{display:grid;gap:14px}.two-zones{grid-template-columns:1fr 1fr}.three-category-board{grid-template-columns:repeat(3,1fr)}.axis-board{grid-template-columns:1fr 1fr}.hierarchy-columns{grid-template-columns:repeat(3,1fr)}
.category-zone{border:2px dashed #b7cbd9;border-radius:16px;padding:13px;background:#fbfdff;min-height:115px}.category-zone h4{margin:0 0 10px;text-align:center;color:#214e6d}.zone-items{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.active-zone{box-shadow:0 0 0 3px #ef9b4b22}
.match-board{display:grid;grid-template-columns:1fr minmax(130px,.7fr) 1fr;gap:12px;align-items:center}.match-left,.match-right,.match-lines{display:grid;gap:9px}.match-line{display:block;padding:8px;border-radius:999px;background:#eef4f8;border:1px dashed #9eb7c8;text-align:center;font-weight:800;font-size:13px}.match-line.is-correct{border-style:solid!important}
.visual-system-map{text-align:center}.system-core{align-self:center;background:#173f64;color:#fff;border-radius:15px;padding:17px;font-size:20px}.system-core b{display:block;margin-top:4px}.system-orbit{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.system-node{border:2px solid #d2e0e9;border-radius:13px;background:#fff;padding:12px 14px;font-weight:800}.system-node small{display:block;font-weight:500;margin-top:4px}.system-links{font-size:30px;color:#ef7b22;letter-spacing:22px}
.concept-tree{align-items:center}.tree-node{border:2px solid #d4e1ea;background:#fff;border-radius:13px;padding:11px 14px;text-align:center;font-weight:850}.tree-node.root{background:#173f64;color:#fff;border-color:#173f64;min-width:260px}.tree-node.branch{background:#eef6fc}.tree-branches{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;width:100%}.tree-column{display:grid;gap:8px;min-width:200px;flex:1}.mini-list{display:grid;gap:6px}.mini-list span{background:#fff;border:1px solid #d4e1ea;border-radius:10px;padding:7px;text-align:center}.hierarchy-path{line-height:1.8;text-align:center;background:#fff;border:1px solid #d4e1ea;border-radius:12px;padding:12px}
.visual-flow{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap}.flow-node{border:2px solid #cbdce7;background:#fff;border-radius:14px;padding:13px 16px;text-align:center;min-width:130px}.flow-node>b{display:block}.flow-node small{display:block;margin-top:5px;color:#587186}.flow-arrow{font-size:25px;color:#ef7b22;font-weight:900}
.branch-solutions{text-align:center}.axis-card{border:2px solid #d2e0e9;background:#fff;border-radius:15px;padding:17px;text-align:center}.axis-card b,.axis-card span,.axis-card small{display:block}.axis-card span{font-size:18px;font-weight:800;margin:5px}.false-statement{padding:16px;border-radius:13px;background:#fff;border:1px solid #d5e1e9;text-align:center;font-weight:850}.big-verdict{align-self:center;font-size:28px;font-weight:950;padding:12px 20px;border-radius:14px}.before-after{display:grid;grid-template-columns:1fr 1fr;gap:16px}.before-box,.after-box{border:2px solid #d4e1ea;border-radius:15px;padding:17px;text-align:center;background:#fff}.before-box{border-color:#e0aaaa;background:#fff4f4}.after-box.muted{opacity:.5}.before-box mark{background:#ffd7d7;padding:2px 5px;border-radius:5px}.question-mark{font-size:35px;color:#b42f2f}.decision-visual{align-items:center}.generalize-arrow,.category-tag{padding:14px;border-radius:12px;background:#eef6fc;border:1px solid #cbdde9;text-align:center;font-weight:850}.category-tag{font-size:18px}
.visual-ready{display:grid;gap:10px;max-width:650px;width:100%;margin:0 auto}.ready-item{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:center;border:2px solid #d4e0e9;border-radius:12px;padding:11px 13px;background:#fff}.ready-item>span{font-size:21px;font-weight:900;text-align:center}
.guided-visual-caption{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:center;padding:10px 12px;border-left:4px solid #2b78a8;background:#f0f6fa;border-radius:9px}.guided-visual-caption b{color:#245c82}.guided-visual-caption span{font-size:14px;line-height:1.45}.guided-visual-caption.solution-caption{border-left-color:#2b8d56;background:#eef9f2}.guided-visual-caption.solution-caption b{color:#176a3d}
@media(max-width:760px){.two-zones,.three-category-board,.axis-board,.hierarchy-columns,.before-after,.match-board{grid-template-columns:1fr}.match-lines{order:3}.visual-flow{flex-direction:column}.flow-arrow{transform:rotate(90deg)}.guided-visual-canvas{padding:10px}}

/* Teacher/Student v2 account UI */
.account-panel{display:block}.account-panel-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.student-account-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}.account-card{background:#fff;border:1px solid #cadbe7;border-radius:14px;padding:14px;min-height:190px}.account-card.logged-in{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:start;min-height:auto}.account-card h4{margin:7px 0 3px;font-size:18px}.account-card p{font-size:13px}.account-badge{display:inline-flex;background:#173f64;color:#fff;border-radius:999px;padding:4px 9px;font-size:12px;font-weight:900}.account-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.account-fields label,.home-field label{font-weight:800;font-size:13px}.account-fields input,.account-fields select,.home-field select{display:block;width:100%;margin-top:5px;padding:10px;border:1px solid #b8c8d5;border-radius:9px;background:#fff;font:inherit}.remember-check{display:flex!important;align-items:center;gap:8px;margin:10px 0;font-size:12px!important;font-weight:650!important;color:#506d84}.remember-check input{width:auto!important;margin:0!important}.account-buttons,.account-panel-actions{display:flex;gap:9px;flex-wrap:wrap}.account-buttons button,.account-panel-actions button,.account-logout{border:0;border-radius:9px;padding:9px 13px;font-weight:850;cursor:pointer}.pilot-save{background:#1e628f;color:#fff}.secondary-btn{background:#edf3f7;color:#254f6d;border:1px solid #c8d8e4!important}.account-logout{background:#fff0f0;color:#8e2c2c;border:1px solid #e5b3b3}.account-panel-actions{margin-top:14px}.home-field select{min-width:260px}.pilot-status{min-height:20px;margin-top:8px}
@media(max-width:850px){.student-account-grid{grid-template-columns:1fr}.account-panel-head{display:block}.student-count-switch{margin-top:12px}.account-fields{grid-template-columns:1fr}.account-card.logged-in{grid-template-columns:1fr}.home-field select{min-width:0}}

.lesson-access-gate{margin:16px 0;padding:24px;border:1px solid #d6dee6;border-radius:16px;background:#f7f9fb;text-align:center;color:#29485f}.lesson-access-gate h3{margin:0 0 8px;font-size:20px}.lesson-access-gate p{max-width:760px;margin:0 auto;line-height:1.55;color:#607486}