:root{--font-sans:-apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", "Segoe UI", sans-serif;--font-mono:"SFMono-Regular", "SF Mono", Menlo, Consolas, monospace;--bg-0:#05080f;--bg-1:#0a1020;--bg-2:#101a30;--panel:#0b1222d1;--panel-strong:#0c1527;--panel-soft:#ffffff0a;--line:#a0b8e429;--line-soft:#a0b8e417;--text:#e9effc;--text-2:#c2cee5;--muted:#8f9ebc;--gold:#ffd166;--gold-soft:#ffe6a6;--gold-deep:#e0a42e;--cyan:#69e0ff;--blue:#6aa9ff;--spring:#7ee787;--summer:#ffd166;--autumn:#ff9e64;--winter:#79c0ff;--phase-color:#c7d2fe;--eclipse-color:#ffb86b;--scale-color:#d2a8ff;--rotation-color:#69e0ff;--radius-s:10px;--radius-m:16px;--radius-l:22px;--topbar-h:64px;--shadow-panel:0 18px 60px #0000006b;--shadow-gold:0 10px 34px #ffb33c3d;--ring:0 0 0 3px #ffd16661}*,:before,:after{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}html,body{min-height:100%;margin:0}body{font-family:var(--font-sans);background:radial-gradient(circle at 50% -10%, #20427c38, transparent 58%), var(--bg-0);color:var(--text);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;overflow:hidden}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}h1,h2,h3,h4,p,dl,dd,dt{margin:0}ul,ol{margin:0;padding:0}:focus-visible{outline:2px solid var(--gold);outline-offset:2px}::selection{background:#ffd1664d}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#a0b8e43d;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#a0b8e466}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.skip-link{z-index:200;background:var(--gold);color:#201500;border-radius:999px;padding:10px 16px;font-weight:700;transition:transform .16s;position:fixed;top:10px;left:10px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}.muted{color:var(--muted)}.eyebrow{letter-spacing:.16em;text-transform:uppercase;color:var(--gold);font-size:10.5px;font-weight:800}.topbar{z-index:60;height:var(--topbar-h);-webkit-backdrop-filter:blur(18px)saturate(120%);backdrop-filter:blur(18px)saturate(120%);background:linear-gradient(#05080ff0,#05080fb8);border-bottom:1px solid #ffffff0f;align-items:center;gap:18px;padding:0 clamp(14px,2.4vw,28px);display:flex;position:fixed;inset:0 0 auto}.brand{border-radius:12px;flex:none;align-items:center;gap:11px;padding:4px 6px;display:flex}.brand:hover .brand-ring{border-color:#ffd166e6}.brand-mark{flex:none;width:34px;height:34px;position:relative}.brand-ring{border:1.5px solid #ffd16685;border-radius:50%;transition:border-color .2s;position:absolute;inset:4px;transform:rotate(-24deg)scaleY(.52)}.brand-sun{background:radial-gradient(circle at 35% 35%,#fff5c2,#ffb020);border-radius:50%;width:12px;height:12px;margin:-6px;position:absolute;top:50%;left:50%;box-shadow:0 0 16px #ffb73cb8}.brand-moon{background:#a9cfff;border-radius:50%;width:7px;height:7px;position:absolute;top:12px;right:3px;box-shadow:0 0 9px #78b4ffd9}.brand-copy{flex-direction:column;line-height:1.12;display:flex}.brand-copy strong{letter-spacing:.01em;font-size:16px;font-weight:800}.brand-copy span{color:var(--muted);letter-spacing:.02em;font-size:9.5px}.main-nav{background:#ffffff09;border:1px solid #ffffff0e;border-radius:999px;align-items:center;gap:3px;padding:3px;display:flex}.main-nav a{color:var(--text-2);letter-spacing:.02em;border-radius:999px;padding:7px 15px;font-size:12.5px;font-weight:700;transition:background .16s,color .16s}.main-nav a:hover{color:var(--text);background:#ffffff0f}.main-nav a.is-active{color:var(--gold-soft);background:linear-gradient(#ffd16633,#ffd1661a);box-shadow:inset 0 0 0 1px #ffd1663d}.topbar-actions{align-items:center;gap:10px;margin-left:auto;display:flex}.model-pill{color:#b9eeff;letter-spacing:.04em;white-space:nowrap;background:#69e0ff12;border:1px solid #69e0ff38;border-radius:999px;padding:5px 10px;font-size:10px;font-weight:700}.icon-button{border:1px solid var(--line);width:34px;height:34px;color:var(--text-2);background:#ffffff0a;border-radius:50%;font-weight:800;transition:background .16s,color .16s,border-color .16s}.icon-button:hover{color:var(--gold-soft);background:#ffd1661f;border-color:#ffd16673}#main{min-height:100vh}.screen{background:var(--bg-0);position:fixed;inset:0}.explore-screen{overflow:hidden}.viewport{background:radial-gradient(at 50% 38%,#12264c8c 0%,#05080f00 56%),radial-gradient(circle at 50% 42%,#0b1631 0%,#05080f 58%,#02040a 100%);position:absolute;inset:0;overflow:hidden}.scene-canvas{touch-action:none;width:100%;height:100%;display:block;position:absolute;inset:0}.scene-label-layer{pointer-events:none;z-index:2;position:absolute;inset:0;overflow:hidden}.scene-label{color:var(--text);letter-spacing:.02em;white-space:nowrap;text-shadow:0 1px 3px #000000b3;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#050912bd;border:1px solid #aac3f02e;border-radius:999px;padding:3px 8px;font-size:11px;font-weight:600;line-height:1.2}.label-body{font-size:12px;font-weight:800}.label-sun{color:#ffe6a6;border-color:#ffd1665c}.label-earth{color:#a9ddff;border-color:#6ebeff57}.label-moon{color:#e4eaf8}.label-small{opacity:.92;padding:2px 7px;font-size:9.5px;font-weight:600}.label-axis{color:#ffe2a0;border-color:#ffd16638}.label-node{color:#cdbcff;border-color:#b39cff52}.label-seoul{color:var(--gold)}.label-sun-arrow{color:var(--gold-soft)}.scene-status{top:calc(var(--topbar-h) + 14px);z-index:10;white-space:nowrap;scrollbar-width:none;border-radius:999px;align-items:center;gap:10px;max-width:calc(100vw - 40px);padding:7px 11px;display:flex;position:absolute;left:50%;overflow-x:auto;transform:translate(-50%)}.scene-status::-webkit-scrollbar{display:none}.scene-status-date{border-right:1px solid var(--line-soft);align-items:baseline;gap:7px;padding-right:10px;display:flex}.scene-status-date strong{letter-spacing:-.01em;font-size:13px;font-weight:750}.scene-status-date span{color:var(--muted);font-variant-numeric:tabular-nums;font-size:10.5px}.scene-chip{color:var(--text-2);align-items:center;gap:5px;font-size:10.5px;font-weight:650;display:inline-flex}.scene-chip:before{content:"";background:var(--chip-color,var(--muted));border-radius:50%;flex:none;width:6px;height:6px}.scene-chip-season{--chip-color:var(--season-color,var(--summer))}.season-spring{--season-color:var(--spring)}.season-summer{--season-color:var(--summer)}.season-autumn{--season-color:var(--autumn)}.season-winter{--season-color:var(--winter)}.scene-chip-phase{color:#e1e7f6}.scene-chip-phase:before{display:none}.scene-chip-phase canvas{width:22px;height:22px}.scene-chip-eclipse{--chip-color:var(--muted)}.scene-chip-eclipse.is-solar{--chip-color:#ffc766;color:#ffe2a9}.scene-chip-eclipse.is-lunar{--chip-color:#8ec8ff;color:#cbe8ff}.scene-chip-eclipse.is-both{--chip-color:#ffb86b;color:#ffddb5}.scene-chip-eclipse.is-none{--chip-color:#7b8ba9;color:var(--muted)}.scale-badge{z-index:11;color:#ffe2a2;letter-spacing:.01em;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);pointer-events:none;background:#1c140894;border:1px solid #ffd1663d;border-radius:999px;align-items:center;gap:7px;padding:6px 11px;font-size:10.5px;font-weight:700;display:inline-flex;position:absolute;bottom:190px;left:20px}.scale-badge-dot{background:var(--gold);border-radius:50%;width:6px;height:6px;box-shadow:0 0 8px #ffd166cc}.hud{z-index:20;pointer-events:none;position:absolute;inset:0}.hud-tabs{display:none}.hud-slot{pointer-events:auto;position:absolute}.hud-slot-info{top:calc(var(--topbar-h) + 72px);width:338px;max-height:calc(100vh - var(--topbar-h) - 252px);padding-right:2px;left:20px;overflow-y:auto}.hud-slot-layers{top:calc(var(--topbar-h) + 72px);width:328px;max-height:calc(100vh - var(--topbar-h) - 252px);padding-left:2px;right:20px;overflow-y:auto}.hud-slot-time{width:min(940px,100vw - 40px);bottom:18px;left:50%;transform:translate(-50%)}.hud-slot-mission{top:calc(var(--topbar-h) + 72px);width:396px;max-height:calc(100vh - var(--topbar-h) - 252px);padding-right:2px;display:none;left:20px;overflow-y:auto}.route-missions .hud-slot-info{display:none}.route-missions .hud-slot-mission{display:block}.glass{border:1px solid var(--line);box-shadow:var(--shadow-panel);-webkit-backdrop-filter:blur(20px)saturate(125%);backdrop-filter:blur(20px)saturate(125%);background:linear-gradient(#111b32e0,#070c19e6),#0a1020b8}.panel{border-radius:var(--radius-l);padding:17px 17px 15px}.panel-head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:13px;display:flex}.panel-title{letter-spacing:-.02em;margin-top:3px;font-size:20px;font-weight:780;line-height:1.2}.panel-sub{color:var(--muted);font-variant-numeric:tabular-nums;margin-top:2px;font-size:10.5px}.panel-live-dot{background:var(--spring);border-radius:50%;flex:none;width:8px;height:8px;margin-top:6px;box-shadow:0 0 10px #7ee787a6}.panel-footnote{border-top:1px solid var(--line-soft);color:var(--muted);margin-top:12px;padding-top:10px;font-size:10px;line-height:1.55}.status-grid{grid-template-columns:1fr 1fr;gap:8px;display:grid}.status-item{background:#ffffff08;border:1px solid #ffffff0e;border-radius:13px;min-width:0;padding:10px 11px}.status-item:nth-child(4){grid-column:1/-1}.status-season{border-left:3px solid var(--season-color,var(--gold))}.status-label{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px;font-size:9.5px;font-weight:700;display:block}.status-value{color:var(--text);font-size:13.5px;font-weight:750;line-height:1.35}.status-season .status-value{color:var(--season-color,var(--gold-soft))}.status-sub{color:var(--muted);margin-top:3px;font-size:10px;line-height:1.45}#status-eclipse{font-size:12px}#status-eclipse.is-solar{color:#ffd991}#status-eclipse.is-lunar{color:#b9e1ff}#status-eclipse.is-none{color:var(--text-2)}#status-eclipse-detail{-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.phase-line{align-items:center;gap:9px;display:flex}.phase-line canvas{flex:none;width:34px;height:34px}.diagram-card{background:linear-gradient(#69e0ff13,#69e0ff06),#ffffff05;border:1px solid #69e0ff29;border-radius:13px;margin-top:10px;padding:11px 12px}.diagram-card h3{color:#b9eeff;letter-spacing:.12em;text-transform:uppercase;margin-bottom:5px;font-size:10px;font-weight:800}.diagram-card p{color:var(--text-2);font-size:11.5px;line-height:1.62}.control-group{border-top:1px solid var(--line-soft);padding:11px 0}.control-group:first-of-type{border-top:0;padding-top:0}.control-label{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px;font-size:9.5px;font-weight:800}.segmented{background:#00000038;border:1px solid #ffffff0d;border-radius:12px;grid-template-columns:1fr 1fr;gap:3px;padding:3px;display:grid}.segmented button{color:var(--muted);background:0 0;border:0;border-radius:9px;padding:7px 6px;font-size:11px;font-weight:700;transition:background .16s,color .16s}.segmented button:hover{color:var(--text)}.segmented button.is-active{color:var(--gold-soft);background:#ffd16624;box-shadow:inset 0 0 0 1px #ffd1662e}.camera-grid{grid-template-columns:repeat(3,1fr);gap:5px;display:grid}.camera-grid button{color:var(--text-2);background:#ffffff06;border:1px solid #ffffff12;border-radius:9px;padding:7px 4px;font-size:10.5px;font-weight:650;transition:background .16s,border-color .16s,color .16s}.camera-grid button:hover{color:var(--text);border-color:#ffd16647}.camera-grid button.is-active{color:var(--gold-soft);background:#ffd16621;border-color:#ffd16657}.toggle-row{cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;gap:12px;padding:6px 1px;display:flex}.toggle-label{color:var(--text-2);font-size:11.5px;font-weight:600}.switch-control{flex:none;display:inline-flex;position:relative}.switch-control input{opacity:0;cursor:pointer;z-index:2;width:100%;height:100%;margin:0;position:absolute;inset:0}.switch-track{background:#00000052;border:1px solid #ffffff1f;border-radius:999px;width:38px;height:22px;transition:background .18s,border-color .18s;display:block;position:relative}.switch-thumb{background:#7282a2;border-radius:50%;width:16px;height:16px;transition:transform .18s,background .18s;position:absolute;top:2px;left:2px}.switch-control input:checked+.switch-track{background:#ffd16638;border-color:#ffd16673}.switch-control input:checked+.switch-track .switch-thumb{background:var(--gold);transform:translate(16px);box-shadow:0 0 9px #ffd16680}.switch-control input:focus-visible+.switch-track{box-shadow:var(--ring)}.facts-panel,.shortcuts-panel{border-top:1px solid var(--line-soft);margin-top:8px;padding-top:9px}.facts-panel summary,.shortcuts-panel summary{cursor:pointer;color:var(--text-2);font-size:11.5px;font-weight:700;list-style:none}.facts-panel summary::-webkit-details-marker{display:none}.shortcuts-panel summary::-webkit-details-marker{display:none}.facts-panel summary:before,.shortcuts-panel summary:before{content:"+";width:14px;color:var(--gold);font-weight:800;display:inline-block}.facts-panel[open] summary:before,.shortcuts-panel[open] summary:before{content:"−"}.scale-facts{gap:7px;margin-top:9px;display:grid}.fact-row{border-bottom:1px dashed #ffffff0f;grid-template-columns:1fr 1.15fr;gap:8px;padding-bottom:7px;display:grid}.fact-row:last-child{border-bottom:0;padding-bottom:0}.fact-row dt{color:var(--muted);font-size:10px;line-height:1.4}.fact-row dd{color:var(--text-2);font-variant-numeric:tabular-nums;font-size:10.5px;line-height:1.4}.fact-row dd span{color:var(--muted);margin-top:2px;font-size:9.5px;display:block}.model-note{color:var(--muted);margin-top:9px;font-size:9.5px;line-height:1.55}.shortcut-list{gap:6px;margin-top:9px;display:grid}.shortcut-row{color:var(--text-2);align-items:center;gap:10px;font-size:10.5px;display:flex}.shortcut-row kbd{min-width:62px;color:var(--text);font-family:var(--font-mono);text-align:center;white-space:nowrap;background:#ffffff0d;border:1px solid #ffffff21;border-bottom-width:2px;border-radius:6px;padding:3px 6px;font-size:9.5px}.btn{letter-spacing:.01em;border:1px solid #0000;border-radius:12px;justify-content:center;align-items:center;gap:7px;min-height:40px;padding:9px 16px;font-size:12.5px;font-weight:750;transition:transform .14s,background .16s,border-color .16s,color .16s,box-shadow .16s;display:inline-flex}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled{cursor:not-allowed;opacity:.45;transform:none}.btn-primary{color:#241700;box-shadow:var(--shadow-gold);background:linear-gradient(#ffe29a,#ffc94d);border-color:#ffeebe73}.btn-primary:hover{background:linear-gradient(#ffebae,#ffd46b)}.btn-secondary{border-color:var(--line);color:var(--text);background:#ffffff0e}.btn-secondary:hover{background:#ffd1661a;border-color:#ffd16659}.btn-ghost{color:var(--text-2);background:0 0;border-color:#0000}.btn-ghost:hover{color:var(--text);background:#ffffff0f}.btn-danger{color:#ffc4c4;background:#ff60601f;border-color:#ff7e7e57}.btn-danger:hover{background:#ff606033}.btn-small{border-radius:9px;min-height:32px;padding:6px 11px;font-size:11px}.btn-pulse{animation:2.6s ease-out infinite btn-pulse}@keyframes btn-pulse{0%{box-shadow:0 0 0 0 #ffd16673, var(--shadow-gold)}68%{box-shadow:0 0 0 11px #ffd16600, var(--shadow-gold)}to{box-shadow:0 0 0 0 #ffd16600, var(--shadow-gold)}}.timeline{border:1px solid var(--line);box-shadow:var(--shadow-panel);-webkit-backdrop-filter:blur(20px)saturate(125%);backdrop-filter:blur(20px)saturate(125%);background:linear-gradient(#111b32e6,#070c19eb),#0a1020cc;border-radius:20px;padding:11px 16px 9px}.timeline-head{align-items:center;gap:13px;display:flex}.transport-btn{min-height:36px;color:var(--gold-soft);background:#ffd1661c;border:1px solid #ffd1664d;border-radius:999px;align-items:center;gap:8px;padding:7px 14px;font-size:11.5px;font-weight:750;display:inline-flex}.transport-btn:hover{background:#ffd1662e}.transport-icon{border-top:5px solid #0000;border-bottom:5px solid #0000;border-left:8px solid;width:0;height:0}.transport-btn.is-playing .transport-icon{border:0;border-left:3px solid;border-right:3px solid;width:8px;height:10px}.timeline-date{flex-direction:column;min-width:0;line-height:1.15;display:flex}.timeline-date-main{color:var(--text);letter-spacing:-.01em;white-space:nowrap;font-size:13.5px;font-weight:750}.timeline-date-sub{color:var(--muted);font-variant-numeric:tabular-nums;font-size:9.5px}.now-btn{border:1px solid var(--line);min-height:30px;color:var(--text-2);white-space:nowrap;background:#ffffff09;border-radius:999px;align-items:center;gap:5px;padding:5px 9px;font-size:10px;font-weight:700;display:inline-flex}.now-btn:hover:not(:disabled){color:var(--text);background:#ffd16614;border-color:#ffd16652}.now-btn:disabled{opacity:.42;cursor:not-allowed}.now-icon{border:1.5px solid;border-radius:50%;flex:none;width:11px;height:11px;position:relative}.now-icon:before,.now-icon:after{content:"";transform-origin:50% 100%;background:currentColor;border-radius:1px;width:1.5px;position:absolute;top:50%;left:50%}.now-icon:before{height:3.5px;transform:translate(-50%,-100%)}.now-icon:after{height:3px;transform:translate(-50%,-100%)rotate(120deg)}.speed-control{margin-left:auto}.speed-control select{border:1px solid var(--line);color:var(--text-2);appearance:none;background-color:#ffffff0a;background-image:linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);background-position:calc(100% - 13px) calc(50% - 1px),calc(100% - 9px) calc(50% - 1px);background-repeat:no-repeat;background-size:4px 4px,4px 4px;border-radius:8px;padding:6px 26px 6px 9px;font-size:10.5px;font-weight:650}.speed-control select:hover{border-color:#ffd1664d}.timeline-track{margin-top:7px;padding-top:20px;position:relative}.season-markers{pointer-events:none;height:18px;position:absolute;inset:0 0 auto}.season-marker{color:var(--season-color,var(--muted));flex-direction:column;align-items:center;display:flex;position:absolute;top:0;transform:translate(-50%)}.season-marker-tick{opacity:.75;background:currentColor;border-radius:2px;order:2;width:2px;height:7px}.season-marker-label{letter-spacing:.02em;opacity:.82;white-space:nowrap;order:1;margin-bottom:1px;font-size:8.5px;font-weight:700}.timeline-range{appearance:none;cursor:pointer;background:0 0;width:100%;height:20px;margin:0;display:block}.timeline-range::-webkit-slider-runnable-track{background:linear-gradient(90deg,#69e0ff47,#ffd1666b),#ffffff14;border:1px solid #ffffff0f;border-radius:999px;height:5px}.timeline-range::-moz-range-track{background:linear-gradient(90deg,#69e0ff47,#ffd1666b),#ffffff14;border:1px solid #ffffff0f;border-radius:999px;height:5px}.timeline-range::-webkit-slider-thumb{appearance:none;background:var(--gold);border:2px solid #fff4cf;border-radius:50%;width:17px;height:17px;margin-top:-7px;box-shadow:0 0 0 4px #ffd1661f,0 0 16px #ffbe4680}.timeline-range::-moz-range-thumb{background:var(--gold);border:2px solid #fff4cf;border-radius:50%;width:15px;height:15px;box-shadow:0 0 16px #ffbe4680}.timeline-range:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 5px #ffd16647,0 0 16px #ffbe4680}.timeline-jumps{gap:5px;margin-top:4px;display:flex}.jump-btn{color:var(--text-2);text-align:center;background:#ffffff06;border:1px solid #ffffff12;border-radius:7px;flex:auto;padding:4px 7px;font-size:9.5px;font-weight:650}.jump-btn:hover{color:var(--text);border-color:#ffd1664d}.jump-spring{box-shadow:inset 2px 0 0 var(--spring)}.jump-summer{box-shadow:inset 2px 0 0 var(--summer)}.jump-autumn{box-shadow:inset 2px 0 0 var(--autumn)}.jump-winter{box-shadow:inset 2px 0 0 var(--winter)}.timeline-hint{color:var(--gold-soft);margin-top:5px;font-size:10px;font-weight:600}.timeline.is-disabled{border-color:#ffd16633}.timeline.is-disabled .timeline-track,.timeline.is-disabled .timeline-jumps{opacity:.5}.timeline-range:disabled{cursor:not-allowed}.timeline--compact{border-radius:16px;padding:8px 12px 7px}.timeline--compact .timeline-head{gap:10px}.timeline--compact .timeline-date-main{font-size:11.5px}.timeline--compact .timeline-date-sub{font-size:8.5px}.timeline--compact .transport-btn{min-height:30px;padding:5px 11px;font-size:10px}.timeline--compact .transport-icon{border-top-width:4px;border-bottom-width:4px;border-left-width:6px}.timeline--compact .season-marker-label{display:none}.timeline--compact .timeline-track{margin-top:2px;padding-top:8px}.timeline--compact .season-markers{height:7px}.mission-panel-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.mission-score{color:var(--muted);font-variant-numeric:tabular-nums;align-items:baseline;gap:2px;font-size:11px;display:flex}.mission-score strong{color:var(--gold);font-size:22px;font-weight:800;line-height:1}.mission-progress{background:#ffffff12;border-radius:999px;height:4px;margin:10px 0 11px;overflow:hidden}.mission-progress span{border-radius:inherit;background:linear-gradient(90deg, var(--cyan), var(--gold));height:100%;transition:width .3s;display:block}.mission-picker{grid-template-columns:repeat(6,1fr);gap:5px;margin-bottom:12px;display:grid}.mission-pick{color:var(--muted);background:#ffffff06;border:1px solid #ffffff12;border-radius:9px;flex-direction:column;align-items:center;gap:3px;padding:6px 2px;font-size:9px;font-weight:700;transition:background .16s,border-color .16s,color .16s;display:flex;position:relative}.mission-pick:hover{color:var(--text);border-color:#ffd1664d}.mission-pick.is-current{color:var(--gold-soft);background:#ffd1661a;border-color:#ffd16680;box-shadow:inset 0 0 0 1px #ffd1661a}.mission-pick-number{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;font-size:10px}.mission-pick-dot{background:var(--concept-color,var(--muted));border-radius:50%;width:5px;height:5px}.mission-pick-dot--seasons{--concept-color:var(--spring)}.mission-pick-dot--phases{--concept-color:var(--phase-color)}.mission-pick-dot--eclipses{--concept-color:var(--eclipse-color)}.mission-pick-dot--scale{--concept-color:var(--scale-color)}.mission-pick-dot--rotation{--concept-color:var(--rotation-color)}.mission-pick-check{background:var(--spring);border-radius:50%;width:12px;height:12px;position:absolute;top:4px;right:4px}.mission-pick-check:after{content:"";border-bottom:1.8px solid #062010;border-right:1.8px solid #062010;width:4px;height:7px;position:absolute;top:1.5px;left:3.5px;transform:rotate(40deg)}.mission-card{border-radius:var(--radius-m);background:linear-gradient(#ffffff09,#ffffff03),#060a144d;border:1px solid #ffffff12;padding:14px}.mission-meta{flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:9px;display:flex}.concept-chip{border:1px solid color-mix(in srgb, var(--concept-color,var(--gold)) 38%, transparent);background:color-mix(in srgb, var(--concept-color,var(--gold)) 14%, transparent);color:var(--concept-color,var(--gold-soft));white-space:nowrap;border-radius:999px;align-items:center;padding:3px 8px;font-size:9.5px;font-weight:750;display:inline-flex}.difficulty-chip{color:var(--muted);white-space:nowrap;background:#ffffff09;border:1px solid #ffffff14;border-radius:999px;padding:3px 7px;font-size:9px;font-weight:650}.mission-index{color:var(--muted);font-variant-numeric:tabular-nums;margin-left:auto;font-size:9.5px}.mission-heading{letter-spacing:-.015em;margin-bottom:6px;font-size:17px;font-weight:780;line-height:1.35}.mission-heading:focus{outline:none}.mission-prompt{color:var(--text-2);font-size:12.5px;line-height:1.62}.mission-gate{color:var(--gold-soft);align-items:center;gap:6px;margin:11px 0 8px;font-size:10px;font-weight:650;line-height:1.45;display:flex}.gate-dot{background:var(--gold);border-radius:50%;flex:none;width:6px;height:6px;box-shadow:0 0 7px #ffd166b3}.mission-options{border:0;gap:6px;margin:0 0 11px;padding:0;display:grid}.option{color:var(--text-2);cursor:pointer;background:#ffffff06;border:1px solid #ffffff13;border-radius:10px;align-items:flex-start;gap:9px;padding:9px 10px;transition:background .16s,border-color .16s,color .16s;display:flex;position:relative}.option:hover{color:var(--text);background:#ffd1660e;border-color:#ffd16642}.option.is-selected{color:var(--text);background:#ffd1661a;border-color:#ffd1667a}.option input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.option-marker{background:#0000002e;border:1.5px solid #aabee173;border-radius:50%;flex:none;width:16px;height:16px;margin-top:1px;position:relative}.option input:checked+.option-marker{border-color:var(--gold);background:#ffd16633}.option input:checked+.option-marker:after{content:"";background:var(--gold);border-radius:50%;position:absolute;inset:3px}.option input:focus-visible+.option-marker{box-shadow:var(--ring)}.option-text{font-size:11.5px;line-height:1.5}.mission-card>.btn{width:100%}.mission-note{color:var(--muted);text-align:center;margin-top:7px;font-size:9.5px;line-height:1.45}.mission-submitted{color:var(--text);background:#ffffff0a;border:1px solid #ffffff0f;border-radius:10px;align-items:baseline;gap:8px;margin:11px 0;padding:9px 10px;font-size:11.5px;line-height:1.45;display:flex}.mission-submitted-label{color:var(--muted);letter-spacing:.04em;text-transform:uppercase;flex:none;font-size:9.5px;font-weight:700}.mission-observe{background:linear-gradient(#69e0ff13,#69e0ff05),#ffffff04;border:1px solid #69e0ff2e;border-radius:12px;margin:11px 0 12px;padding:11px 12px}.mission-observe p{color:var(--text-2);font-size:11.5px;line-height:1.62}.mission-observe .eyebrow{color:#b9eeff;margin-bottom:4px}.mission-scene-label{margin-top:7px;color:var(--muted)!important;font-size:9.5px!important}.mission-result .result-banner{background:#7ee78714;border:1px solid #7ee78738;border-radius:12px;align-items:flex-start;gap:10px;margin-bottom:11px;padding:11px;display:flex}.mission-result.is-incorrect .result-banner{background:#ffa47014;border-color:#ffa4703d}.result-icon{background:linear-gradient(#8df29a,#4fc766);border-radius:50%;flex:none;width:32px;height:32px;position:relative;box-shadow:0 0 18px #7ee78747}.mission-result.is-correct .result-icon:after{content:"";border-bottom:2.5px solid #06300e;border-right:2.5px solid #06300e;width:8px;height:14px;position:absolute;top:7px;left:11px;transform:rotate(42deg)}.mission-result.is-incorrect .result-icon{background:linear-gradient(#ffc28c,#f08a4b);box-shadow:0 0 18px #f08a4b42}.mission-result.is-incorrect .result-icon:after{content:"!";color:#3a1a06;place-items:center;font-size:18px;font-weight:900;display:grid;position:absolute;inset:0}.result-banner h3{font-size:15px;font-weight:780;line-height:1.35}.result-banner p{color:var(--text-2);margin-top:3px;font-size:10.5px;line-height:1.5}.answer-compare{background:#0000002e;border:1px solid #ffffff0e;border-radius:10px;gap:5px;margin-bottom:11px;padding:10px;display:grid}.answer-compare p{color:var(--text-2);font-size:10.5px;line-height:1.45}.answer-label{min-width:50px;color:var(--muted);letter-spacing:.03em;font-size:9px;font-weight:750;display:inline-block}.answer-label--correct{color:var(--spring)}.result-copy h4{color:var(--text);letter-spacing:.04em;text-transform:uppercase;margin-bottom:5px;font-size:11px;font-weight:800}.result-copy p{color:var(--text-2);font-size:11.5px;line-height:1.65}.result-copy .takeaway{color:#fff0c4;background:#ffd1660f;border:1px solid #ffd1662e;border-radius:10px;margin-top:9px;padding:9px 10px;font-size:11px;font-weight:650;line-height:1.55}.takeaway-mark{color:var(--gold);font-weight:900}.mission-actions{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.mission-actions .btn{flex:auto}.mission-empty{color:var(--text-2);text-align:center;border:1px dashed #ffffff1a;border-radius:12px;padding:18px 12px;font-size:12px;line-height:1.6}.fact-card{z-index:26;border-radius:var(--radius-m);border-color:#ffd16633;width:340px;padding:14px 15px 15px;position:absolute;bottom:190px;right:20px}.fact-card h2{margin:2px 34px 5px 0;font-size:17px;font-weight:780}.fact-card p{color:var(--text-2);font-size:11.5px;line-height:1.62}.fact-close{width:28px;height:28px;color:var(--muted);background:#ffffff0a;border:1px solid #ffffff1a;border-radius:50%;font-size:17px;line-height:1;position:absolute;top:8px;right:8px}.fact-close:hover{color:var(--text);border-color:#ffd1664d}.observer-view{z-index:35;padding-top:var(--topbar-h);background:#04070d;flex-direction:column;display:flex;position:absolute;inset:0}.observer-head{background:#060a138c;border-bottom:1px solid #ffffff0f;flex-wrap:wrap;align-items:center;gap:12px;padding:11px clamp(14px,3vw,28px);display:flex}.observer-place{color:var(--text-2);align-items:center;gap:6px;font-size:11px;font-weight:650;display:inline-flex}.observer-place-dot{background:var(--gold);border-radius:50%;width:7px;height:7px;box-shadow:0 0 8px #ffd166b3}.observer-clock{color:var(--muted);align-items:baseline;gap:7px;margin-left:auto;font-size:10.5px;display:flex}.observer-clock strong{color:var(--gold-soft);font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:14px}.model-badge{color:#b9eeff;white-space:nowrap;background:#69e0ff12;border:1px solid #69e0ff3d;border-radius:999px;padding:4px 9px;font-size:9.5px;font-weight:700}.observer-stage{flex:auto;min-height:0;position:relative;overflow:hidden}#sky-canvas{width:100%;height:100%;display:block}.observer-inset{border-radius:15px;width:250px;height:176px;padding:7px;position:absolute;top:16px;right:18px;overflow:hidden}#sky-inset{border-radius:9px;width:100%;height:100%;display:block}.inset-label{color:#e0ecff6b;pointer-events:none;font-size:8.5px;font-weight:600;position:absolute;bottom:9px;left:12px}.observer-info{border-radius:var(--radius-m);width:390px;max-width:calc(100% - 36px);padding:13px 14px;position:absolute;bottom:18px;left:18px}.observer-info-grid{grid-template-columns:1fr 1fr;gap:7px 12px;display:grid}.info-row{flex-direction:column;gap:2px;min-width:0;display:flex}.info-row span{color:var(--muted);letter-spacing:.07em;text-transform:uppercase;font-size:9px;font-weight:750}.info-row strong{color:var(--text);font-variant-numeric:tabular-nums;font-size:10.5px;font-weight:650;line-height:1.4}.info-row strong[data-visible=false]{color:var(--muted)}.observer-text{border-top:1px solid var(--line-soft);color:var(--text-2);margin-top:9px;padding-top:8px;font-size:10.5px;line-height:1.55}.observer-note{color:var(--muted);margin-top:6px;font-size:9px;line-height:1.5}.observer-timeline{flex:none;padding:0 18px 16px}.observer-timeline .timeline{background:linear-gradient(#111b32eb,#070c19f0),#0a1020cc}.teacher-screen{padding:calc(var(--topbar-h) + 30px) clamp(16px, 4vw, 56px) 80px;background:radial-gradient(circle at 18% -8%, #24488842, transparent 48%), radial-gradient(circle at 88% 0%, #cc903621, transparent 40%), var(--bg-0);overflow-y:auto}.teacher-layout{max-width:1440px;margin:0 auto}.teacher-head{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:24px;display:flex}.page-title{letter-spacing:-.035em;margin:4px 0 8px;font-size:clamp(28px,4vw,44px);font-weight:820;line-height:1.05}.page-lede{max-width:760px;color:var(--text-2);font-size:13px;line-height:1.7}.teacher-head-actions{flex-wrap:wrap;flex:none;gap:8px;display:flex}.teacher-summary-grid{grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:22px;display:grid}.summary-card{border-radius:var(--radius-m);border:1px solid var(--line);background:linear-gradient(#ffffff0d,#ffffff05),#080e1c99;flex-wrap:wrap;align-items:baseline;gap:5px;padding:15px 17px;display:flex}.summary-card strong{color:var(--gold);font-variant-numeric:tabular-nums;font-size:30px;font-weight:820;line-height:1}.summary-label{width:100%;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-size:10px;font-weight:750}.summary-unit{color:var(--muted);font-variant-numeric:tabular-nums;font-size:11px}.summary-card--progress{display:block}.teacher-progress{background:#ffffff12;border-radius:999px;height:6px;margin:9px 0 6px;overflow:hidden}.teacher-progress span{border-radius:inherit;background:linear-gradient(90deg, var(--cyan), var(--gold));height:100%;transition:width .3s;display:block}.teacher-columns{grid-template-columns:minmax(0,1.55fr) minmax(300px,.72fr);align-items:start;gap:20px;display:grid}.teacher-section{border-radius:var(--radius-l);border:1px solid var(--line);box-shadow:var(--shadow-panel);background:linear-gradient(#111b32cc,#070c19db),#0a1020b8;padding:17px}.teacher-section h2{letter-spacing:-.01em;font-size:16px;font-weight:780}.section-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.section-actions{gap:4px;display:flex}.teacher-mission-list{gap:7px;display:grid}.teacher-mission{background:#ffffff06;border:1px solid #ffffff12;border-radius:12px;overflow:hidden}.teacher-mission.is-done{border-color:#7ee78733}.teacher-mission summary{cursor:pointer;align-items:center;gap:11px;padding:11px 12px;list-style:none;display:flex}.teacher-mission summary::-webkit-details-marker{display:none}.teacher-mission-number{width:28px;height:28px;color:var(--muted);font-family:var(--font-mono);background:#0003;border:1px solid #ffffff14;border-radius:9px;flex:none;place-items:center;font-size:10px;font-weight:700;display:grid}.teacher-mission.is-done .teacher-mission-number{color:var(--spring);border-color:#7ee78740}.teacher-mission-summary{flex-direction:column;gap:4px;min-width:0;display:flex}.teacher-mission-title{color:var(--text);font-size:12.5px;font-weight:700;line-height:1.4}.teacher-mission-meta{flex-wrap:wrap;align-items:center;gap:5px;display:flex}.teacher-status{color:var(--muted);background:#ffffff0b;border-radius:999px;padding:2px 7px;font-size:8.5px;font-weight:700}.teacher-status.is-done{color:var(--spring);background:#7ee7871a}.teacher-status.is-attempted{color:var(--eclipse-color);background:#ffb86b1a}.teacher-mission-chevron{border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);flex:none;width:9px;height:9px;margin-left:auto;transition:transform .16s;transform:rotate(45deg)}.teacher-mission[open] .teacher-mission-chevron{transform:rotate(-135deg)}.teacher-mission-body{padding:0 13px 13px 51px}.teacher-question{color:var(--text);font-size:12px;line-height:1.6}.teacher-answer{color:var(--text);background:#7ee7870e;border:1px solid #7ee78729;border-radius:9px;margin-top:8px;padding:8px 10px;font-size:11.5px;line-height:1.55}.teacher-explanation{color:var(--text-2);margin-top:8px;font-size:11px;line-height:1.65}.teacher-takeaway{color:#fff0c4;margin-top:7px;font-size:10.5px;line-height:1.55}.teacher-student-answer{border-top:1px dashed #ffffff12;flex-wrap:wrap;gap:6px;margin-top:9px;padding-top:8px;font-size:10.5px;line-height:1.5;display:flex}.teacher-student-label{color:var(--muted);font-weight:700}.teacher-scene-row{justify-content:space-between;align-items:center;gap:10px;margin-top:9px;font-size:9.5px;display:flex}.teacher-side{gap:14px;display:grid}.teacher-projection .switch-row{margin-top:6px}.teacher-note{border-top:1px solid var(--line-soft);color:var(--gold-soft);margin-top:10px;padding-top:9px;font-size:9.5px;line-height:1.5}.teacher-model-list{color:var(--text-2);gap:6px;margin-top:9px;padding-left:16px;font-size:10.5px;line-height:1.55;display:grid}.teacher-model-list li::marker{color:var(--gold)}.switch-row{color:var(--text-2);cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:7px 0;font-size:11px;display:flex}.switch-label{min-width:0}.switch-row--plain{background:#ffffff06;border:1px solid #ffffff12;border-radius:9px;margin-top:8px;padding:8px 10px}.switch-row--plain input{width:17px;height:17px;accent-color:var(--gold)}.dialog{border:1px solid var(--line);border-radius:var(--radius-l);background:linear-gradient(180deg, #141f39fa, #080d1afc), var(--panel-strong);width:min(620px,100vw - 28px);max-height:min(86vh,760px);color:var(--text);padding:0;box-shadow:0 30px 100px #0000009e}.dialog::backdrop{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#02050bad}.help-form{padding:22px}.dialog-head{margin-bottom:16px}.dialog-head h2{letter-spacing:-.02em;margin-top:3px;font-size:24px;font-weight:800}.help-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.help-grid h3{color:var(--text);margin-bottom:8px;font-size:12px;font-weight:780}.help-grid p{color:var(--text-2);font-size:11px;line-height:1.65}.help-grid p+p{margin-top:7px}.help-settings{border-top:1px solid var(--line-soft);margin-top:16px;padding-top:10px}.dialog-actions{justify-content:flex-end;gap:7px;margin-top:18px;display:flex}.dialog-actions .btn{min-width:88px}dialog>form>h2{font-size:22px;font-weight:800}dialog>form{padding:22px}dialog>form>p{color:var(--text-2);margin-top:8px;font-size:12px;line-height:1.6}.toast{z-index:80;color:#ffe9b2;text-align:center;opacity:0;visibility:hidden;pointer-events:none;background:#181308eb;border:1px solid #ffd16647;border-radius:999px;max-width:min(520px,100vw - 32px);padding:10px 15px;font-size:11.5px;font-weight:650;line-height:1.4;transition:opacity .18s,transform .18s,visibility .18s;position:fixed;bottom:22px;left:50%;transform:translate(-50%,12px);box-shadow:0 12px 40px #00000073}.toast.is-visible{opacity:1;visibility:visible;transform:translate(-50%)}@media (max-width:1180px){.hud-slot-info{width:310px}.hud-slot-layers{width:302px}.hud-slot-mission{width:366px}.scene-status-date strong{font-size:12px}.teacher-columns{grid-template-columns:minmax(0,1.35fr) minmax(280px,.7fr)}}@media (max-width:1023px) and (min-width:768px){.brand-copy span{display:none}.hud-slot-info,.hud-slot-layers{top:calc(var(--topbar-h) + 68px);max-height:calc(100vh - var(--topbar-h) - 238px);width:286px}.hud-slot-mission{width:338px;max-height:calc(100vh - var(--topbar-h) - 238px)}.status-grid{grid-template-columns:1fr}.status-item:nth-child(4){grid-column:auto}.teacher-summary-grid{grid-template-columns:repeat(2,1fr)}.teacher-columns{grid-template-columns:1fr}.teacher-side{grid-template-columns:1fr 1fr;align-items:start}}@media (max-width:767px){:root{--topbar-h:56px}.topbar{gap:8px;padding:0 10px}.brand{gap:7px;padding:2px}.brand-mark{width:28px;height:28px}.brand-ring{inset:3px}.brand-sun{width:10px;height:10px;margin:-5px}.brand-moon{width:6px;height:6px;top:10px;right:1px}.brand-copy strong{font-size:14px}.brand-copy span,.model-pill{display:none}.main-nav{gap:1px;margin-left:auto;padding:2px}.main-nav a{padding:6px 9px;font-size:11px}.topbar-actions{margin-left:0}.icon-button{width:30px;height:30px;font-size:12px}.explore-screen{height:100dvh;padding-top:var(--topbar-h);flex-direction:column;display:flex;overflow:hidden}.viewport{flex:auto;min-height:0;position:relative;inset:auto}.scene-status{border-radius:14px;gap:8px;max-width:none;padding:6px 9px;top:10px;left:10px;right:10px;transform:none}.scene-status-date{gap:5px;padding-right:8px}.scene-status-date strong{font-size:11.5px}.scene-status-date span{font-size:9px}.scene-chip{font-size:9.5px}.scene-chip-phase canvas{width:18px;height:18px}.scale-badge{padding:4px 8px;font-size:9px;bottom:calc(44dvh + 10px);left:10px}.hud{border-top:1px solid var(--line);background:linear-gradient(180deg, #111b32f7, #060a14fc), var(--bg-1);pointer-events:auto;z-index:40;border-radius:20px 20px 0 0;flex-direction:column;flex:none;height:44dvh;min-height:292px;max-height:56dvh;display:flex;position:relative;inset:auto;box-shadow:0 -18px 50px #0000007a}.hud-tabs{flex:none;gap:3px;padding:8px 10px 0;display:flex}.hud-tabs button{color:var(--muted);background:0 0;border:0;border-bottom:2px solid #0000;border-radius:9px 9px 0 0;flex:auto;padding:8px 6px;font-size:11px;font-weight:750}.hud-tabs button.is-active{color:var(--gold-soft);border-bottom-color:var(--gold);background:#ffd16613}.hud-slot{flex:auto;width:auto;min-height:0;max-height:none;padding:12px 12px 18px;display:none;position:static;overflow-y:auto;transform:none}.hud-slot.is-active{display:block}.hud-slot-info,.hud-slot-layers,.hud-slot-mission{top:auto;left:auto;right:auto}.route-missions .hud-slot-info,.route-missions .hud-slot-mission{display:none}.route-missions .hud-slot-mission.is-active{display:block}.hud-slot .panel{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border:0;border-radius:0;padding:0}.hud-slot .timeline{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border:0;padding:4px 0 0}.hud-slot-time{padding-top:14px}.status-grid{grid-template-columns:1fr 1fr}.status-item{padding:9px 10px}.diagram-card{margin-top:8px}.camera-grid{grid-template-columns:repeat(3,1fr)}.camera-grid button{padding:8px 3px;font-size:10px}.segmented button{padding:8px 5px;font-size:10.5px}.timeline-head{gap:9px}.transport-btn{min-height:36px;padding:7px 12px}.timeline-date-main{font-size:12px}.speed-control select{padding:6px 24px 6px 8px;font-size:10px}.timeline-jumps{gap:4px}.jump-btn{padding:7px 4px;font-size:9px}.season-marker-label{display:none}.timeline-range{height:26px}.timeline-range::-webkit-slider-thumb{width:21px;height:21px;margin-top:-9px}.timeline-range::-moz-range-thumb{width:19px;height:19px}.mission-picker{gap:4px}.mission-pick{padding:6px 1px}.mission-card{padding:12px}.mission-heading{font-size:16px}.mission-prompt{font-size:12px}.option{padding:10px}.option-text{font-size:12px}.btn{min-height:42px}.fact-card{width:auto;padding:12px 13px;bottom:calc(44dvh + 10px);left:10px;right:10px}.fact-card h2{font-size:15px}.fact-card p{font-size:11px}.observer-view{padding-top:var(--topbar-h)}.observer-head{gap:7px;padding:8px 10px}.observer-head .btn{min-height:32px;padding:5px 9px;font-size:10px}.observer-place{font-size:9.5px}.observer-clock{gap:5px;margin-left:0;font-size:9px}.observer-clock strong{font-size:12px}.model-badge{margin-left:auto;padding:3px 7px;font-size:8px}.observer-inset{border-radius:11px;width:146px;height:106px;padding:5px;top:8px;right:8px}.inset-label{font-size:7px;bottom:7px;left:9px}.observer-info{border-radius:12px;width:auto;max-width:none;padding:9px 10px;bottom:8px;left:8px;right:8px}.observer-info-grid{gap:5px 9px}.info-row span{font-size:8px}.info-row strong{font-size:9px}.observer-text{margin-top:6px;padding-top:6px;font-size:9px}.observer-note{display:none}.observer-timeline{padding:0 8px 8px}.observer-timeline .timeline{border:1px solid var(--line);background:#0a1020e6}.teacher-screen{padding:calc(var(--topbar-h) + 18px) 12px 50px}.teacher-head{margin-bottom:16px;display:block}.page-title{font-size:30px}.page-lede{font-size:12px}.teacher-head-actions{margin-top:12px}.teacher-summary-grid{grid-template-columns:1fr 1fr;gap:7px}.summary-card{padding:11px 12px}.summary-card strong{font-size:24px}.teacher-columns,.teacher-side{grid-template-columns:1fr}.teacher-section{padding:13px}.teacher-mission-body{padding-left:13px}.teacher-mission-title{font-size:11.5px}.section-head{flex-wrap:wrap}.help-grid{grid-template-columns:1fr}.help-form{padding:17px}.dialog-head h2{font-size:20px}.toast{bottom:calc(44dvh + 12px)}.hud[hidden]~.toast{bottom:18px}.skip-link{top:6px;left:6px}}@media (max-width:380px){.main-nav a{padding:6px 7px;font-size:10px}.brand-copy strong{font-size:13px}.scene-status-date span,.observer-place{display:none}.now-btn{padding:5px 7px}.now-text{display:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}body.reduce-motion *,body.reduce-motion :before,body.reduce-motion :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}#worksheet{display:none}@media print{@page{size:A4;margin:13mm}html,body{color:#111!important;background:#fff!important;overflow:visible!important}.topbar,.explore-screen,#toast,#sr-live,.skip-link,dialog,.boot{display:none!important}.teacher-screen{color:#111!important;background:#fff!important;padding:0!important;display:block!important;position:static!important;inset:auto!important;overflow:visible!important}.teacher-layout{display:none!important}#worksheet{font-family:var(--font-sans);font-size:10.5pt;line-height:1.55;color:#111!important;display:block!important}.worksheet-head{border-bottom:2px solid #111;margin-bottom:7mm;padding-bottom:7mm}.worksheet-brand{letter-spacing:.04em;text-transform:uppercase;color:#444;margin-bottom:3mm;font-size:9pt;font-weight:800}.worksheet-head h1{letter-spacing:-.03em;margin-bottom:3mm;font-size:20pt;font-weight:800}.worksheet-intro{color:#333;margin-bottom:4mm}.worksheet-meta{color:#222;justify-content:space-between;gap:10mm;font-size:10pt;display:flex}.worksheet-progress{color:#555;margin-top:2mm;font-size:9pt}.worksheet-list{gap:6mm;padding-left:6mm;display:grid}.worksheet-question{break-inside:avoid;page-break-inside:avoid}.worksheet-question-head{align-items:baseline;gap:3mm;display:flex}.worksheet-number{font-size:11pt;font-weight:800}.worksheet-question h3{margin-bottom:1mm;font-size:11.5pt;font-weight:800}.worksheet-prompt{color:#222;margin-bottom:2mm}.worksheet-options{color:#333;gap:.8mm;margin-bottom:2mm;padding-left:6mm;display:grid}.worksheet-answer-line{color:#444;border-bottom:1px dotted #bbb;padding-bottom:2mm}.worksheet-key{break-before:page;page-break-before:always}.worksheet-key h2{border-bottom:1.5px solid #111;margin-bottom:4mm;padding-bottom:2mm;font-size:15pt;font-weight:800}.worksheet-key ol{gap:3mm;padding-left:6mm;display:grid}.worksheet-key li{color:#222}.worksheet-key strong{color:#000}.worksheet-footer{color:#555;border-top:1px solid #999;margin-top:8mm;padding-top:3mm;font-size:8.5pt}.worksheet-footer p+p{margin-top:1mm}}