:root{--bg-primary:#0d1117;--bg-secondary:#161b22;--bg-tertiary:#21262d;--bg-overlay:rgba(13,17,23,.92);--bg-glass:rgba(22,27,34,.85);--text-primary:#e6edf3;--text-secondary:#8b949e;--text-tertiary:#6e7681;--text-accent:#58a6ff;--border:rgba(48,54,61,.7);--border-focus:#58a6ff;--border-subtle:rgba(48,54,61,.4);--accent:#6cc0c4;--accent-hover:#88d4d8;--accent-glow:rgba(108,192,196,.15);--green:#3fb950;--orange:#f78166;--red:#f85149;--purple:#bc8cff;--cyan:#39d2c0;--radius-sm:6px;--radius:10px;--radius-lg:14px;--shadow:0 8px 32px rgba(0,0,0,.5);--shadow-sm:0 2px 8px rgba(0,0,0,.3);--transition:0.2s cubic-bezier(0.4,0,0.2,1);--sidebar-width:320px;--toolbar-gap:12px;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Fira Code",monospace}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;overflow:hidden}body{font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--text-primary);background:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{cursor:pointer;border:none;background:none}button,input{font:inherit;color:inherit}a{color:var(--accent);text-decoration:none}.app{display:flex;height:100vh;width:100vw}.app,.main{overflow:hidden;position:relative}.main{flex:1 1}#cesium-container{position:absolute;inset:0}#cesium-container,#cesium-container .cesium-viewer{width:100%;height:100%}#cesium-container .cesium-viewer-bottom{display:none}#cesium-container .cesium-widget-credits{display:none!important}.cesium-error{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg-primary);z-index:100}.cesium-error__content{text-align:center;padding:40px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);max-width:400px}.cesium-error__content h3{color:var(--red);margin-bottom:12px;font-size:18px}.cesium-error__content p{color:var(--text-secondary);margin-bottom:8px}.cesium-error__content code{font-family:var(--font-mono);background:var(--bg-tertiary);padding:2px 8px;border-radius:4px;font-size:13px;color:var(--accent)}.sidebar{width:var(--sidebar-width);height:100vh;background:var(--bg-glass);backdrop-filter:blur(20px) saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;position:relative;z-index:50;transform:translateX(-100%);transition:transform var(--transition)}.sidebar--open{transform:translateX(0)}.sidebar__header{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 12px;border-bottom:1px solid var(--border-subtle)}.sidebar__brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}.sidebar__brand:hover{opacity:.85}.sidebar__logo-img{width:36px;height:36px;border-radius:8px;flex-shrink:0;object-fit:contain}.sidebar__title{font-size:16px;font-weight:700;letter-spacing:-.02em;line-height:1.2}.sidebar__subtitle{font-size:11px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.08em;font-weight:500}.sidebar__close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition)}.sidebar__close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.sidebar__close svg{width:18px;height:18px}.sidebar__section{padding:14px 16px;border-bottom:1px solid var(--border-subtle);overflow-y:auto}.sidebar__section:last-child{border-bottom:none;flex:1 1}.section-title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-tertiary);margin-bottom:10px;display:flex;align-items:center;gap:8px}.section-title svg{color:var(--text-tertiary);flex-shrink:0}.search-form{width:100%}.search-input-wrap{position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:12px;width:16px;height:16px;color:var(--text-tertiary);pointer-events:none}.search-input{width:100%;padding:10px 12px 10px 38px;background:var(--bg-tertiary);border:1px solid var(--border-subtle);border-radius:var(--radius);color:var(--text-primary);font-size:13px;outline:none;transition:all var(--transition)}.search-input::placeholder{color:var(--text-tertiary)}.search-input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--accent-glow)}.search-results{margin-top:8px;background:var(--bg-tertiary);border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border-subtle)}.search-result{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;text-align:left;transition:background var(--transition);font-size:13px}.search-result:hover{background:var(--accent-glow)}.layer-list{display:flex;flex-direction:column;gap:2px}.layer-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);font-size:13px}.layer-item:hover{background:var(--bg-tertiary)}.layer-checkbox{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:18px;height:18px;border:2px solid var(--border);border-radius:4px;background:transparent;cursor:pointer;position:relative;flex-shrink:0;transition:all var(--transition)}.layer-checkbox:checked{background:var(--accent);border-color:var(--accent)}.layer-checkbox:checked:after{content:"";position:absolute;left:5px;top:2px;width:4px;height:8px;border:solid var(--bg-primary);border-width:0 2px 2px 0;transform:rotate(45deg)}.layer-icon{font-size:16px;flex-shrink:0}.layer-name{color:var(--text-primary)}.location-list{display:flex;flex-direction:column;gap:2px;max-height:280px;overflow-y:auto}.location-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);transition:all var(--transition);font-size:13px;text-align:left;width:100%}.location-item:hover{background:var(--accent-glow)}.location-item__icon{font-size:18px;flex-shrink:0}.location-item__name{flex:1 1}.location-item__arrow{width:16px;height:16px;color:var(--text-tertiary);opacity:0;transform:translateX(-4px);transition:all var(--transition)}.location-item:hover .location-item__arrow{opacity:1;transform:translateX(0)}.tools-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:6px;gap:6px}.tool-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 8px;background:var(--bg-tertiary);border:1px solid var(--border-subtle);border-radius:var(--radius);transition:all var(--transition);font-size:11px;color:var(--text-secondary)}.tool-btn:hover{color:var(--text-primary)}.tool-btn--active,.tool-btn:hover{background:var(--accent-glow);border-color:var(--accent)}.tool-btn--active{color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow)}.tool-btn__icon{font-size:20px}.tool-btn__name{font-weight:500}.tool-hint{margin-top:10px;padding:10px 12px;background:var(--accent-glow);border:1px solid rgba(88,166,255,.2);border-radius:var(--radius-sm);font-size:12px;color:var(--text-secondary);display:flex;align-items:center;justify-content:space-between;gap:8px}.tool-hint__cancel{font-size:12px;color:var(--red);font-weight:500;white-space:nowrap;padding:4px 8px;border-radius:4px;transition:background var(--transition)}.tool-hint__cancel:hover{background:rgba(248,81,73,.15)}.measure-result{margin-top:10px;padding:10px 12px;background:var(--bg-tertiary);border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}.measure-result__row{display:flex;justify-content:space-between;align-items:center;padding:4px 0;font-size:13px}.measure-result__row span{color:var(--text-secondary)}.measure-result__row strong{color:var(--accent);font-family:var(--font-mono);font-size:13px;font-weight:500}.btn-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition)}.btn-icon:hover{background:var(--bg-tertiary);color:var(--text-primary)}.btn-icon svg{width:20px;height:20px}.menu-toggle{position:absolute;top:16px;left:16px;z-index:40;background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);box-shadow:var(--shadow-sm);width:42px;height:42px;border-radius:var(--radius)}.menu-toggle:hover{background:var(--bg-secondary);border-color:var(--accent)}.toolbar{position:absolute;top:16px;right:16px;z-index:40;display:flex;gap:4px;padding:6px;background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow)}.toolbar__btn{width:38px;height:38px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius);color:var(--text-secondary);transition:all var(--transition)}.toolbar__btn svg{width:18px;height:18px}.toolbar__btn:hover{background:var(--accent-glow);color:var(--text-primary)}.toolbar__btn--danger:hover{background:rgba(248,81,73,.15);color:var(--red)}.toolbar__divider{width:1px;background:var(--border);margin:4px 2px}.coord-bar{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);z-index:40;gap:0;padding:8px 20px;background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:50px;box-shadow:var(--shadow-sm)}.coord-bar,.coord-bar__item{display:flex;align-items:center}.coord-bar__item{gap:8px;padding:0 14px}.coord-bar__label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary)}.coord-bar__value{font-family:var(--font-mono);font-size:12px;font-weight:500;color:var(--text-primary);letter-spacing:-.01em}.coord-bar__divider{width:1px;height:20px;background:var(--border)}.loading-overlay{position:absolute;inset:0;z-index:200;justify-content:center;background:#0d1117;gap:28px}.loading-brand,.loading-overlay{display:flex;flex-direction:column;align-items:center}.loading-brand{gap:20px;animation:fadeIn .6s ease-out}.loading-brand__icon{width:72px;height:72px;object-fit:contain;animation:pulse 2s ease-in-out infinite}.loading-brand__wordmark{height:40px;width:auto;object-fit:contain}.loading-bar{width:200px}.loading-bar__track{width:100%;height:3px;background:var(--bg-tertiary);border-radius:2px;overflow:hidden}.loading-bar__fill{height:100%;width:40%;background:linear-gradient(90deg,var(--accent),#88d4d8);border-radius:2px;animation:loadSlide 1.5s ease-in-out infinite}.loading-text{font-size:13px;font-weight:500;color:var(--text-tertiary);letter-spacing:.02em}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.7;transform:scale(.95)}}@keyframes loadSlide{0%{transform:translateX(-100%)}50%{transform:translateX(250%)}to{transform:translateX(-100%)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.copyright{position:absolute;bottom:16px;right:16px;z-index:40;display:flex;align-items:center;gap:6px;padding:6px 12px;background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:50px;font-size:11px;font-weight:500;color:var(--text-tertiary);text-decoration:none;transition:all var(--transition)}.copyright:hover{color:var(--text-secondary);border-color:var(--border)}.copyright__icon{width:14px;height:14px;object-fit:contain;border-radius:3px}.toast{position:absolute;bottom:70px;left:50%;transform:translateX(-50%);z-index:300;padding:10px 24px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:50px;font-size:13px;font-weight:500;color:var(--text-primary);box-shadow:var(--shadow);animation:toastIn .3s ease-out;white-space:nowrap}@keyframes toastIn{0%{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@media (max-width:768px){:root{--sidebar-width:100vw}.sidebar{position:absolute;z-index:60;box-shadow:var(--shadow)}.coord-bar{bottom:10px;padding:6px 12px;border-radius:var(--radius);gap:0}.coord-bar__item{padding:0 8px}.coord-bar__value{font-size:11px}.toolbar{top:10px;right:10px;padding:4px}.toolbar__btn{width:34px;height:34px}}