/* Ben Toland's Photography Lab — Challenge Mode */
.challenge-shell{max-width:1260px;margin:0 auto}.challenge-intro{max-width:820px}.challenge-toolbar{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:14px;margin:18px 0}.challenge-switch{display:flex;gap:7px;flex-wrap:wrap}.challenge-switch button{background:#152638;border:1px solid #395266;color:#daedf5;border-radius:12px;padding:11px 16px;min-width:92px;transition:border-color .15s,background .15s}.challenge-switch button[aria-pressed="true"]{background:#65d4b9;border-color:#65d4b9;color:#08231d;font-weight:800}.challenge-switch button:hover:not([aria-pressed="true"]){border-color:#72d9c0}.challenge-label{display:block;margin:0 0 7px;color:#b6ccdc;font-size:12px;font-weight:650;letter-spacing:.06em;text-transform:uppercase}.challenge-grid{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,1fr);gap:16px;align-items:start}.challenge-grid>.panel{min-width:0;margin:0;padding:20px}.challenge-portrait{position:relative;aspect-ratio:4/5;background:#0a1017;overflow:hidden;border-radius:15px;border:1px solid #334556}.challenge-portrait img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 34%}.challenge-photo-label{position:absolute;left:0;right:0;bottom:0;padding:45px 16px 16px;background:linear-gradient(transparent,rgba(0,0,0,.88));font-size:13px;color:#f0fafc}.challenge-topline{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.challenge-number{font-size:12px;color:#b7cad4}.challenge-visual-note{margin-top:13px;font-size:12px;line-height:1.6;color:#a9bdca}.challenge-workspace h2{margin-top:3px}.challenge-workspace>p{margin:6px 0 14px}.challenge-workspace label{font-size:13px}.challenge-workspace select,.challenge-workspace input:not([type="checkbox"]){margin-top:6px}.challenge-diagram{background:radial-gradient(circle at 50% 45%,#1d3442,#0a1623 76%);border:1px solid #365264;border-radius:14px;padding:8px;margin:13px 0}.challenge-diagram svg{display:block;width:100%;height:auto;touch-action:pan-y}.challenge-diagram .challenge-key-handle{cursor:grab;touch-action:none}.challenge-diagram .challenge-key-handle:active{cursor:grabbing}.challenge-diagram text{font-family:system-ui,-apple-system,sans-serif}.challenge-slider{margin:13px 0}.challenge-slider-header{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:2px}.challenge-slider-header strong{color:#e2fff2;font-size:13px;font-variant-numeric:tabular-nums}.challenge-slider label{display:block}.challenge-slider input{accent-color:#65d4b9}.challenge-extra{background:#0d1b27;border:1px solid #345066;border-radius:14px;padding:15px;margin:15px 0}.challenge-extra>h3{margin:0 0 8px;font-size:16px}.challenge-extra .challenge-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.challenge-extra label{min-width:0}.challenge-tick{display:flex!important;align-items:center;gap:9px;margin:12px 0}.challenge-tick input{width:auto;flex:0 0 auto;accent-color:#65d4b9}.challenge-actions{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 8px}.challenge-actions button{flex:1 1 auto}.challenge-result{margin-top:16px;padding:15px;background:#0d2b2a;border:1px solid #3c8b7c;border-radius:14px}.challenge-result[hidden],.challenge-extra[hidden],.challenge-shoot[hidden]{display:none!important}.challenge-score{font-size:38px;line-height:1;font-weight:850;color:#96f3da;margin:8px 0}.challenge-grade-subtitle{color:#cfe9e6;font-size:13px}.challenge-score-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 13px;margin:14px 0}.challenge-score-list div{border-bottom:1px solid #24534b;padding:7px 0;font-size:12px;display:flex;justify-content:space-between;gap:8px}.challenge-score-list strong{font-variant-numeric:tabular-nums;white-space:nowrap}.challenge-answer{font-size:14px;line-height:1.65;border-top:1px solid #34675c;padding-top:12px;margin-top:12px}.challenge-answer strong{color:#d9fff0}.challenge-feedback-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:13px}.challenge-feedback-actions button{flex:1 1 150px}.challenge-shoot{margin-top:13px;background:#172533;border:1px solid #385468;padding:16px;border-radius:14px}.challenge-shoot li{margin:8px 0;line-height:1.55}.challenge-shoot h3{margin:0 0 7px}.challenge-shoot .muted{font-size:13px}.challenge-progress{margin-top:20px;padding:20px;background:#141f2c;border:1px solid #304657;border-radius:17px}.challenge-progress strong{color:#94ecd6}.challenge-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:13px 0}.challenge-stat{padding:13px;border-radius:12px;background:#0d1b28;border:1px solid #2d4557}.challenge-stat strong{font-size:22px;display:block}.challenge-stat small{display:block;margin-top:5px}.challenge-history{display:flex;flex-wrap:wrap;gap:8px}.challenge-history span{font-size:12px;padding:7px 11px;background:#0b1927;border:1px solid #315064;border-radius:99px}.challenge-disclaimer{font-size:12px;color:#b7c8d4;line-height:1.6;margin-top:10px}.challenge-output{min-height:0}.challenge-output:empty{display:none}.challenge-muted{color:#abbfce}.challenge-try-again{color:#b5e8db}.challenge-next-hint{font-size:12px;color:#a4bfcd;margin-top:6px}.challenge-quiz-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}@media(max-width:860px){.challenge-grid{grid-template-columns:1fr}.challenge-portrait{max-width:620px;margin:0 auto}.challenge-toolbar{align-items:start}.challenge-grid>.panel{padding:17px}}@media(max-width:480px){.challenge-grid>.panel{padding:14px}.challenge-switch button{min-width:75px;padding:10px 13px}.challenge-extra .challenge-two{grid-template-columns:1fr}.challenge-score-list{grid-template-columns:1fr}.challenge-stats{gap:7px}.challenge-stat{padding:9px}.challenge-stat strong{font-size:20px}.challenge-stat small{font-size:10px}.challenge-photo-label{font-size:12px}.challenge-workspace h2{font-size:20px}.challenge-progress{padding:15px}}

.challenge-help{margin:18px 0 14px;border:1px solid #3b6170;border-radius:14px;background:#102633;overflow:hidden}.challenge-help summary{cursor:pointer;padding:15px 18px;font-weight:800;color:#d7fff2;list-style-position:inside}.challenge-help summary::marker{color:#65d4b9}.challenge-help-time{float:right;font-size:12px;font-weight:500;color:#b4cbd3;margin-left:10px}.challenge-help-body{padding:0 19px 16px;color:#d6e5ed;line-height:1.65;font-size:14px}.challenge-help-body ol{padding-left:22px;margin:8px 0 12px}.challenge-help-body li{margin:0 0 10px;padding-left:4px}.challenge-help-body p{margin:10px 0}.challenge-help-note{font-size:12px;color:#b5cbd5}@media(max-width:600px){.challenge-help-time{float:none;display:block;margin:4px 0 0 20px}.challenge-help-body{padding:0 15px 15px;font-size:13px}}