*{margin:0;padding:0;box-sizing:border-box}:root{--panel-bg: rgba(10, 14, 28, .82);--panel-border: rgba(120, 150, 255, .25);--accent: #7aa2ff;--text: #e8ecf8;--text-dim: #9aa3bd}html,body,#app{width:100%;height:100%;overflow:hidden}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:#04060f;color:var(--text)}#scene{position:absolute;top:0;right:0;bottom:0;left:0;display:block}#topbar{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;padding:14px 20px;pointer-events:none}#topbar h1{font-size:20px;font-weight:600;letter-spacing:2px;text-transform:uppercase;text-shadow:0 0 18px rgba(122,162,255,.6)}#lang-switch{pointer-events:auto;display:flex;gap:4px}.lang-btn{background:var(--panel-bg);border:1px solid var(--panel-border);color:var(--text-dim);padding:6px 12px;border-radius:6px;cursor:pointer;font-weight:600;transition:all .2s}.lang-btn.active{color:var(--text);border-color:var(--accent);background:#7aa2ff2e}#planet-list{position:absolute;left:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:6px}.planet-btn{display:flex;align-items:center;gap:8px;background:var(--panel-bg);border:1px solid transparent;color:var(--text-dim);padding:7px 12px;border-radius:8px;cursor:pointer;font-size:13px;text-align:left;transition:all .15s}.planet-btn:hover{color:var(--text);border-color:var(--panel-border)}.planet-btn.selected{color:var(--text);border-color:var(--accent)}.planet-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}#info-panel{position:absolute;right:16px;top:70px;width:320px;max-height:calc(100% - 200px);overflow-y:auto;background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:12px;padding:20px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:opacity .25s,transform .25s}#info-panel.hidden{opacity:0;transform:translate(24px);pointer-events:none}#info-close{position:absolute;top:10px;right:12px;background:none;border:none;color:var(--text-dim);font-size:22px;cursor:pointer}#info-close:hover{color:var(--text)}#info-name{font-size:22px;margin-bottom:10px;color:var(--accent)}#info-desc{font-size:14px;line-height:1.55;color:var(--text);margin-bottom:14px}#info-facts{width:100%;border-collapse:collapse;font-size:13px;margin-bottom:14px}#info-facts td{padding:6px 0;border-bottom:1px solid rgba(255,255,255,.08)}#info-facts td:first-child{color:var(--text-dim);padding-right:10px}#info-facts td:last-child{text-align:right}#btn-reset-view{width:100%;background:#7aa2ff26;border:1px solid var(--accent);color:var(--text);padding:9px;border-radius:8px;cursor:pointer;font-size:13px}#btn-reset-view:hover{background:#7aa2ff4d}#controls{position:absolute;bottom:0;left:0;right:0;display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px;pointer-events:none}.control-group{display:flex;align-items:center;gap:10px;pointer-events:auto;background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:10px;padding:8px 16px}.control-group label{font-size:13px;color:var(--text-dim)}#speed{width:180px;accent-color:var(--accent)}#speed-value{font-size:13px;min-width:64px;color:var(--text)}.control-group.buttons button{background:none;border:1px solid var(--panel-border);color:var(--text-dim);padding:7px 14px;border-radius:7px;cursor:pointer;font-size:13px;transition:all .15s}.control-group.buttons button:hover{color:var(--text)}.control-group.buttons button.toggled{color:var(--text);border-color:var(--accent);background:#7aa2ff26}#hint{font-size:12px;color:var(--text-dim);text-shadow:0 1px 4px #000}.planet-label{color:var(--text);font-size:11px;letter-spacing:1px;text-shadow:0 0 6px #000,0 0 12px #000;pointer-events:none;-webkit-user-select:none;user-select:none}@media (max-width: 720px){#planet-list{display:none}#info-panel{left:16px;width:auto}#hint{display:none}}#loading{position:absolute;top:0;right:0;bottom:0;left:0;background:#04060f;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;z-index:100;transition:opacity .5s}#loading.hidden{opacity:0;pointer-events:none}#loading p{color:var(--text-dim);font-size:14px}.spinner{width:44px;height:44px;border:3px solid rgba(122,162,255,.2);border-top-color:var(--accent);border-radius:50%;animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}#topbar{z-index:60}#topbar-right{display:flex;align-items:center;gap:10px;pointer-events:auto}#back-link{color:var(--text-dim);text-decoration:none;font-size:18px;border:1px solid var(--panel-border);background:var(--panel-bg);border-radius:6px;padding:4px 10px}#back-link:hover{color:var(--text);border-color:var(--accent)}.planet-btn.indent{margin-left:18px;font-size:12px}.planet-label.small{font-size:9px}#info-funfact{background:#ffcd5014;border:1px solid rgba(255,205,80,.35);border-radius:10px;padding:12px;margin-bottom:14px}#info-funfact h3{font-size:13px;color:#ffd966;margin-bottom:6px}#info-funfact p{font-size:13px;line-height:1.5}#activities{position:absolute;right:16px;bottom:110px;display:flex;flex-direction:column;gap:10px}.activity-btn{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;padding:12px 18px;border-radius:14px;border:1px solid var(--panel-border);background:var(--panel-bg);color:var(--text);cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:transform .15s,border-color .15s,box-shadow .15s}.activity-btn:hover{transform:scale(1.06);border-color:var(--accent);box-shadow:0 4px 24px #7aa2ff4d}#tour-panel{position:absolute;bottom:120px;left:50%;transform:translate(-50%);width:min(560px,calc(100% - 32px));background:var(--panel-bg);border:1px solid var(--accent);border-radius:16px;padding:20px 24px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 8px 48px #7aa2ff40;transition:opacity .25s,transform .25s}#tour-panel.hidden{opacity:0;transform:translate(-50%,24px);pointer-events:none}#tour-close{position:absolute;top:8px;right:12px;background:none;border:none;color:var(--text-dim);font-size:22px;cursor:pointer}#tour-emoji{font-size:34px}#tour-name{color:var(--accent);font-size:20px;margin:4px 0 8px}#tour-text{font-size:14.5px;line-height:1.6;margin-bottom:14px}#tour-nav{display:flex;align-items:center;justify-content:space-between;gap:12px}#tour-nav button{background:#7aa2ff26;border:1px solid var(--accent);color:var(--text);padding:8px 16px;border-radius:8px;cursor:pointer;font-size:14px}#tour-nav button:disabled{opacity:.35;cursor:default}#tour-dots{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.dot{width:8px;height:8px;border-radius:50%;background:#ffffff40}.dot.on{background:var(--accent);box-shadow:0 0 8px var(--accent)}#quiz-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#02040cb3;display:flex;align-items:center;justify-content:center;z-index:50;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}#quiz-overlay.hidden{display:none}#quiz-panel{position:relative;width:min(520px,calc(100% - 32px));background:var(--panel-bg);border:1px solid var(--accent);border-radius:18px;padding:28px;box-shadow:0 12px 60px #7aa2ff4d}#quiz-close{position:absolute;top:10px;right:14px;background:none;border:none;color:var(--text-dim);font-size:24px;cursor:pointer}#quiz-progress{color:var(--text-dim);font-size:13px;margin-bottom:10px}#quiz-question{font-size:20px;line-height:1.4;margin-bottom:18px}#quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.quiz-option{padding:14px 12px;font-size:15px;border-radius:10px;border:1px solid var(--panel-border);background:#ffffff0a;color:var(--text);cursor:pointer;transition:all .15s}.quiz-option:hover:not(:disabled){border-color:var(--accent);background:#7aa2ff1f}.quiz-option.correct{border-color:#4ade80;background:#4ade802e}.quiz-option.wrong{border-color:#f87171;background:#f871712e}#quiz-feedback{margin-top:14px;font-size:14px;line-height:1.5;min-height:22px}#quiz-feedback.ok{color:#4ade80}#quiz-feedback.bad{color:#fca5a5}#quiz-next{margin-top:12px;width:100%;padding:12px;font-size:15px;font-weight:600;border-radius:10px;border:1px solid var(--accent);background:#7aa2ff33;color:var(--text);cursor:pointer}#quiz-next.hidden{display:none}#quiz-result{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--panel-bg);border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:24px;text-align:center}#quiz-result.hidden{display:none}#quiz-medal{font-size:64px}#quiz-score{color:var(--accent)}#quiz-comment{color:var(--text);font-size:15px}#quiz-retry{margin-top:10px;padding:10px 24px;font-size:15px;border-radius:10px;border:1px solid var(--accent);background:#7aa2ff33;color:var(--text);cursor:pointer}#weight-panel{position:absolute;right:16px;top:70px;width:320px;max-height:calc(100% - 220px);overflow-y:auto;background:var(--panel-bg);border:1px solid var(--accent);border-radius:14px;padding:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:opacity .25s,transform .25s}#weight-panel.hidden{opacity:0;transform:translate(24px);pointer-events:none}#weight-panel h2{font-size:18px;color:var(--accent);margin-bottom:8px}#weight-panel>p{font-size:13px;color:var(--text-dim);line-height:1.5;margin-bottom:12px}#weight-close{position:absolute;top:8px;right:12px;background:none;border:none;color:var(--text-dim);font-size:22px;cursor:pointer}#weight-input-row{display:flex;align-items:center;gap:8px;margin-bottom:14px}#weight-input{flex:1;font-size:18px;padding:8px 12px;border-radius:8px;border:1px solid var(--panel-border);background:#ffffff0f;color:var(--text)}.weight-row{display:flex;justify-content:space-between;padding:7px 8px;font-size:14px;border-radius:6px}.weight-row:nth-child(odd){background:#ffffff0a}.weight-row.earth{border:1px solid var(--accent)}.weight-row strong{color:#ffd966}#weight-fun{margin-top:12px;font-size:12.5px;color:var(--text-dim);text-align:center}@media (max-width: 720px){#activities{bottom:150px;right:10px}.activity-btn{font-size:13px;padding:9px 12px}#weight-panel{left:16px;width:auto}}