.ef-opening{margin-bottom:18px}
.lesson-kicker{display:inline-block;color:var(--primary);font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.central-question{margin-top:12px!important;padding-top:10px;border-top:1px solid #d4e6df}
.two-col,.three-col,.comparison-grid{display:grid;gap:12px;margin:14px 0}.two-col,.comparison-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.three-col{grid-template-columns:repeat(3,minmax(0,1fr))}
.mini-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px}.mini-card strong{display:block;color:var(--primary-dark);margin-bottom:5px}
.quick-question,.source-box,.challenge-box,.studio-box,.practice-box,.safety-box{border-radius:12px;margin:15px 0}
.quick-question{border:1px solid var(--line);border-left:5px solid var(--primary);padding:14px;background:#fff}.quick-question>strong{display:block;color:var(--primary-dark);margin-bottom:4px}
.choice-row{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}.choice-row button{border:1px solid #cbdad4;background:#fff;border-radius:9px;padding:9px 12px;color:var(--text);font-weight:800;cursor:pointer}.choice-row button:hover{background:var(--primary-soft)}.choice-row button.is-correct{background:var(--ok-bg);border-color:var(--ok);color:var(--ok)}.choice-row button.is-wrong{background:var(--danger-bg);border-color:var(--danger);color:var(--danger)}
.choice-feedback{font-size:13px}.choice-feedback.is-correct{color:var(--ok)}.choice-feedback.is-wrong{color:var(--danger)}
.source-box{padding:15px;border:1px solid var(--line);background:var(--surface-soft);border-left:5px solid var(--blue)}
.challenge-box{background:#fff5e9;border:1px solid #efd5b3;border-left:5px solid var(--accent);padding:15px}.challenge-box details{margin-top:10px}.challenge-box summary{cursor:pointer;font-weight:800;color:var(--primary-dark)}
.studio-box{border:1px solid #c8ded6;background:linear-gradient(135deg,#eef8f4,#fff);padding:15px}.studio-box strong{color:var(--primary-dark)}
.safety-box{background:#fff7f5;border:1px solid #f1cec9;border-left:5px solid var(--danger);padding:15px}.safety-box strong{color:#8d2018}
.practice-box{background:linear-gradient(135deg,#f1fbf7,#fff);border:2px solid #b8dacf;padding:16px}.practice-box>.card-title{font-size:18px}
.practice-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:15px 0}.practice-step{min-height:120px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px;position:relative}.practice-step .step-number{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-weight:900;font-size:12px;margin-bottom:7px}.practice-step strong{display:block;color:var(--primary-dark);margin-bottom:4px}
.move-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:12px 0}.move-option{border:1px solid var(--line);border-radius:11px;padding:12px;background:#fff}.move-option strong{display:block;color:var(--primary-dark);margin-bottom:4px}.move-option small{display:block;color:var(--muted)}
.timer-panel{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:#112f29;color:#fff;border-radius:14px;padding:15px;margin:14px 0}.timer-display{font-variant-numeric:tabular-nums;font-size:42px;font-weight:900;letter-spacing:.04em;min-width:120px}.timer-controls{display:flex;gap:8px;flex-wrap:wrap}.timer-controls button{border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);color:#fff;border-radius:9px;padding:9px 12px;font-weight:800;cursor:pointer}.timer-controls button:hover{background:rgba(255,255,255,.2)}
.rpe-box{border:1px solid #c7dbe5;background:var(--blue-soft);border-radius:12px;padding:14px;margin:14px 0}.rpe-box input[type="range"]{width:100%}.rpe-scale{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;font-size:10px;color:var(--muted);margin-top:5px}.rpe-scale span:last-child{text-align:right}.rpe-readout{font-size:18px;font-weight:900;color:var(--blue);margin-top:8px}
.field-note{border:1px dashed #9fbab1;background:#fbfdfc;border-radius:12px;padding:14px;margin:14px 0}.field-note strong{display:block;color:var(--primary-dark);margin-bottom:5px}
.body-signal-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0}.body-signal{background:#fff;border:1px solid var(--line);border-radius:11px;padding:12px}.body-signal strong{display:block;color:var(--primary-dark);margin-bottom:4px}
.recovery-chart{width:100%;height:auto;max-height:300px;border-radius:12px;background:#f7fbfa;border:1px solid var(--line);margin:12px 0}
.ef-tags{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0}.ef-tags span{border-radius:999px;padding:6px 9px;background:var(--primary-soft);border:1px solid #c8ded6;color:var(--primary-dark);font-size:11px;font-weight:850}
.chapter-checkpoint{margin-top:28px;padding-top:18px;border-top:2px solid var(--line)}
@media(max-width:900px){.practice-flow{grid-template-columns:repeat(2,minmax(0,1fr))}.body-signal-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.two-col,.three-col,.comparison-grid,.move-options,.practice-flow,.body-signal-grid{grid-template-columns:1fr}.choice-row{display:grid;grid-template-columns:1fr}.choice-row button{text-align:left}.timer-panel{align-items:flex-start}.timer-display{font-size:36px}}