:root{
  --bg:#050a12;
  --panel:rgba(11,19,31,.86);
  --panel-2:rgba(16,27,42,.78);
  --line:rgba(120,175,215,.16);
  --line-strong:rgba(120,190,225,.32);
  --txt:#dbe8f4;
  --txt-2:#91a6ba;
  --txt-3:#61768b;
  --accent:#4fd8c8;
  --accent-2:#ffbc63;
  --danger:#ff7b6b;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--txt);font-family:var(--sans)}
body{-webkit-font-smoothing:antialiased}
button,input,select{font-family:inherit}
button{cursor:pointer;color:inherit}
#globe-canvas{position:fixed;inset:0;width:100%;height:100%;display:block;outline:none}

/* ---------- loading ---------- */
#loading{position:fixed;inset:0;z-index:90;display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:radial-gradient(circle at 50% 45%,#0d1b2b 0%,#050a12 70%);transition:opacity .6s ease,visibility .6s}
#loading.done{opacity:0;visibility:hidden}
.loading-ring{width:74px;height:74px;border:1px solid rgba(79,216,200,.18);border-top-color:var(--accent);border-radius:50%;animation:spin 1.2s linear infinite;margin-bottom:26px}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-title{font:600 26px/1 var(--mono);letter-spacing:.42em;color:var(--accent);text-indent:.42em}
.loading-sub{margin-top:14px;font-size:12px;color:var(--txt-3);letter-spacing:.08em}

/* ---------- topbar ---------- */
#topbar{position:fixed;top:0;left:0;right:0;height:58px;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:0 22px;background:linear-gradient(180deg,rgba(5,10,18,.92),rgba(5,10,18,0));pointer-events:none}
#topbar>*{pointer-events:auto}
.brand{display:flex;align-items:baseline;gap:10px}
.brand-mark{color:var(--accent);font-size:19px;transform:translateY(1px)}
.brand-name{font:600 19px/1 var(--mono);letter-spacing:.22em}
.brand-sub{font-size:12px;color:var(--txt-2);letter-spacing:.14em}
.brand-tag{margin-left:8px;padding:3px 8px;border:1px solid var(--line);border-radius:3px;font:10px/1 var(--mono);color:var(--txt-3);letter-spacing:.1em}
.top-actions{display:flex;gap:8px}
.ghost-btn{background:var(--panel);border:1px solid var(--line);border-radius:5px;padding:7px 13px;font-size:12px;color:var(--txt-2);transition:.2s}
.ghost-btn:hover{border-color:var(--line-strong);color:var(--accent);background:var(--panel-2)}
.ghost-btn.active,.panel-btn.active{border-color:rgba(79,216,200,.55);color:var(--accent);background:rgba(79,216,200,.14)}
.panel-btn{display:none}

/* ---------- left panel ---------- */
#panel{position:fixed;left:18px;top:70px;bottom:52px;width:302px;z-index:15;overflow-y:auto;overflow-x:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:9px;backdrop-filter:blur(14px);
  box-shadow:0 18px 50px rgba(0,0,0,.45);scrollbar-width:thin;scrollbar-color:rgba(120,175,215,.3) transparent}
#panel::-webkit-scrollbar{width:5px}
#panel::-webkit-scrollbar-thumb{background:rgba(120,175,215,.28);border-radius:3px}
.panel-block{padding:15px 16px 16px;border-bottom:1px solid rgba(120,175,215,.09)}
.panel-block:last-child{border-bottom:0}
.block-title{display:flex;align-items:center;gap:9px;font-size:12px;letter-spacing:.12em;color:var(--txt);margin-bottom:13px;font-weight:600}
.block-title span{font:10px/1 var(--mono);color:var(--accent);border:1px solid rgba(79,216,200,.35);padding:4px 5px;border-radius:3px}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.mode-btn{background:rgba(20,34,50,.55);border:1px solid var(--line);border-radius:5px;padding:9px 8px;text-align:left;
  font-size:12px;color:var(--txt-2);transition:.18s;line-height:1.25}
.mode-btn span{display:block;font-size:10px;color:var(--txt-3);margin-top:3px}
.mode-btn:hover{border-color:var(--line-strong);color:var(--txt)}
.mode-btn.active{background:rgba(79,216,200,.11);border-color:rgba(79,216,200,.55);color:var(--accent)}
.mode-btn.active span{color:rgba(79,216,200,.65)}
.hint{margin:10px 0 0;font-size:11px;line-height:1.6;color:var(--txt-3)}
.ctrl-row{display:block;margin:11px 0}
.ctrl-label{display:flex;justify-content:space-between;font-size:11px;color:var(--txt-2);margin-bottom:7px}
.ctrl-label em{font:11px/1 var(--mono);font-style:normal;color:var(--accent)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:3px;background:rgba(120,175,215,.22);border-radius:2px;outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 3px rgba(79,216,200,.18);cursor:pointer}
input[type=range]::-moz-range-thumb{width:12px;height:12px;border:0;border-radius:50%;background:var(--accent);cursor:pointer}
.switch-row{display:flex;gap:14px;margin-top:13px;flex-wrap:wrap}
.switch{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--txt-2);cursor:pointer;user-select:none}
.switch input{display:none}
.switch span{width:24px;height:13px;border-radius:8px;background:rgba(120,175,215,.2);position:relative;transition:.2s}
.switch span:after{content:"";position:absolute;top:2px;left:2px;width:9px;height:9px;border-radius:50%;background:var(--txt-3);transition:.2s}
.switch input:checked+span{background:rgba(79,216,200,.35)}
.switch input:checked+span:after{left:13px;background:var(--accent)}
.field{width:100%;background:rgba(6,14,24,.7);border:1px solid var(--line);border-radius:5px;color:var(--txt);
  padding:8px 10px;font-size:12px;outline:none;transition:.2s}
.field:focus{border-color:rgba(79,216,200,.55)}
select.field{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--txt-3) 50%),linear-gradient(135deg,var(--txt-3) 50%,transparent 50%);
  background-position:calc(100% - 15px) 15px,calc(100% - 10px) 15px;background-size:5px 5px;background-repeat:no-repeat}
select.field option{background:#0c1725}
.coord-row{display:grid;grid-template-columns:1fr 1fr 58px;gap:6px;margin-top:8px}
.coord-row .field{min-width:0;padding:8px 7px;font:11px/1 var(--mono)}
.primary-btn{background:rgba(79,216,200,.16);border:1px solid rgba(79,216,200,.5);border-radius:5px;color:var(--accent);font-size:12px;transition:.2s}
.primary-btn:hover{background:rgba(79,216,200,.28)}
.wide-btn{width:100%;margin-top:9px;background:rgba(20,34,50,.55);border:1px solid var(--line);border-radius:5px;
  padding:9px;font-size:11.5px;color:var(--txt-2);transition:.2s}
.wide-btn:hover{border-color:var(--line-strong);color:var(--accent)}
.wide-btn.subtle{padding:6px;font-size:10.5px;color:var(--txt-3)}
.geo-ctrl{margin-top:11px}
.drop-zone{margin-top:2px;border:1px dashed rgba(120,175,215,.3);border-radius:6px;padding:13px 8px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:4px;font-size:11px;color:var(--txt-2);cursor:pointer;transition:.2s;position:relative}
.drop-zone:hover,.drop-zone.dragover{border-color:var(--accent);background:rgba(79,216,200,.07);color:var(--accent)}
.drop-zone input{display:none}
.drop-icon{font-size:19px;color:var(--accent);line-height:1}
.drop-zone small{font-size:10px;color:var(--txt-3)}
.dem-info{margin-top:8px;font:10px/1.5 var(--mono);color:var(--txt-3)}
.lod-box{margin-top:10px;padding:9px 10px;background:rgba(6,14,24,.6);border:1px solid var(--line);border-radius:5px}
.lod-box>div:first-child{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--txt-2)}
.lod-box em{font:11px/1 var(--mono);font-style:normal;color:var(--accent)}
.lod-bar{height:3px;background:rgba(120,175,215,.18);border-radius:2px;margin:8px 0 7px;overflow:hidden}
.lod-bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .25s ease}
.lod-box small{display:block;font-size:9.5px;line-height:1.55;color:var(--txt-3)}
.overlay-box{margin-top:9px;padding:9px 10px;background:rgba(6,14,24,.35);border:1px dashed rgba(79,216,200,.28);border-radius:5px}
.overlay-box .ctrl-row{margin:9px 0 5px}
.overlay-box small{display:block;font-size:9.5px;line-height:1.55;color:var(--txt-3)}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;background:rgba(6,14,24,.6);padding:3px;border-radius:6px;border:1px solid var(--line)}
.seg-btn{background:transparent;border:0;border-radius:4px;padding:6px;font-size:11px;color:var(--txt-3);transition:.2s}
.seg-btn.active{background:rgba(79,216,200,.16);color:var(--accent)}

/* ---------- legend ---------- */
#legend{position:fixed;right:18px;top:70px;width:188px;z-index:14;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;padding:13px 14px;backdrop-filter:blur(12px);box-shadow:0 12px 36px rgba(0,0,0,.35)}
.legend-head{font-size:11px;letter-spacing:.1em;color:var(--txt-2);margin-bottom:9px}
.legend-head.second{margin-top:14px;padding-top:12px;border-top:1px solid rgba(120,175,215,.1)}
.legend-bar{height:11px;border-radius:3px;border:1px solid rgba(255,255,255,.12);
  background:linear-gradient(90deg,#0a2a52 0%,#1166a8 18%,#2f9ea8 32%,#4c9a58 46%,#b7b45c 60%,#a5733f 76%,#8d644f 87%,#f2f5f7 100%)}
#legend.normal-mode .legend-bar{background:linear-gradient(90deg,#ff4d4d 0%,#8080ff 50%,#4dff4d 100%)}
.legend-scale{display:flex;justify-content:space-between;font:9px/1 var(--mono);color:var(--txt-3);margin-top:5px}
.legend-note{margin-top:8px;font-size:10px;line-height:1.65;color:var(--txt-3)}

/* ---------- inspector ---------- */
#inspector{position:fixed;right:18px;bottom:52px;width:410px;z-index:16;background:var(--panel);border:1px solid var(--line-strong);
  border-radius:9px;backdrop-filter:blur(14px);box-shadow:0 20px 60px rgba(0,0,0,.55);
  transform:translateY(16px) scale(.97);opacity:0;visibility:hidden;transition:.32s cubic-bezier(.2,.8,.2,1)}
#inspector.visible{transform:none;opacity:1;visibility:visible}
.insp-head{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-bottom:1px solid rgba(120,175,215,.12)}
.insp-title{font-size:12px;letter-spacing:.08em;display:flex;align-items:center;gap:8px}
.insp-title em{font:9px/1 var(--mono);font-style:normal;color:var(--accent);border:1px solid rgba(79,216,200,.3);padding:3px 5px;border-radius:3px;letter-spacing:.1em}
.insp-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}
.insp-actions{display:flex;gap:5px}
.icon-btn{width:23px;height:23px;display:flex;align-items:center;justify-content:center;background:rgba(120,175,215,.08);
  border:1px solid var(--line);border-radius:4px;color:var(--txt-2);font-size:13px;line-height:1}
.icon-btn:hover{color:var(--accent);border-color:var(--line-strong)}
#btn-insp-max{font-size:15px}
#btn-insp-max.active{color:var(--accent);border-color:rgba(79,216,200,.55);background:rgba(79,216,200,.14)}
.insp-head{user-select:none;cursor:default}
/* 最大化：几何切换不做过渡，避免 ResizeObserver 在动画每一帧反复重载瓦片 */
#inspector.maximized{left:18px;right:18px;top:64px;bottom:50px;width:auto;z-index:45;
  display:flex;flex-direction:column}
#inspector.maximized .insp-body{height:auto;min-height:0;flex:1 1 auto}
#inspector.maximized .insp-foot{flex:0 0 auto}

/* 最大化后左栏被整块盖住：顶栏 ☰ 把它变成可呼出的抽屉，
   否则大图状态下换不了地图源 / 缩放级别 */
body.insp-max .panel-btn{display:inline-block}
body.insp-max #panel{z-index:46;opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s}
body.insp-max #panel.open{opacity:1;visibility:visible;transform:none}
.insp-body{position:relative;height:284px;background:#0a1622;overflow:hidden}
#tile-canvas{width:100%;height:100%;display:block;cursor:grab;touch-action:none}
.insp-overlay{position:absolute;top:10px;left:12px;pointer-events:none}
.insp-badge{display:inline-block;padding:3px 7px;border-radius:3px;background:rgba(79,216,200,.14);
  border:1px solid rgba(79,216,200,.35);font:9px/1.4 var(--mono);color:var(--accent);letter-spacing:.06em}
.insp-coord{margin-top:6px;font:10px/1.4 var(--mono);color:var(--txt-2);text-shadow:0 1px 4px #000}
.insp-tip{position:absolute;top:12px;right:11px;font-size:9px;color:rgba(145,166,186,.75);text-shadow:0 1px 4px #000;pointer-events:none}
.tip-touch{display:none}
.street-ctrl{margin-top:9px}
.insp-foot{display:flex;gap:14px;padding:8px 12px;border-top:1px solid rgba(120,175,215,.12);
  font:9.5px/1.4 var(--mono);color:var(--txt-3);white-space:nowrap;overflow:hidden}
#inspector.collapsed .insp-body,#inspector.collapsed .insp-foot{display:none}

/* ---------- statusbar ---------- */
#statusbar{position:fixed;left:0;right:0;bottom:0;height:38px;z-index:18;display:flex;align-items:center;gap:22px;padding:0 20px;
  background:rgba(7,14,23,.92);border-top:1px solid var(--line);backdrop-filter:blur(10px);font-size:10.5px}
.status-group{display:flex;align-items:center;gap:7px;white-space:nowrap}
.status-group.right{margin-left:auto}
.status-key{color:var(--txt-3)}
.status-val{font:10.5px/1 var(--mono);color:var(--txt-2)}
.status-group.right .status-val{color:var(--accent)}

/* ---------- modal & toast ---------- */
.modal{position:fixed;inset:0;z-index:60;background:rgba(3,8,14,.72);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:.25s;backdrop-filter:blur(4px)}
.modal.open{opacity:1;visibility:visible}
.modal-card{width:min(560px,calc(100vw - 40px));max-height:calc(100vh - 40px);background:#0c1725;border:1px solid var(--line-strong);border-radius:10px;
  box-shadow:0 30px 80px rgba(0,0,0,.6);display:flex;flex-direction:column}
.modal-head{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);
  font-size:13px;letter-spacing:.1em}
.modal-body{padding:8px 20px 20px;font-size:12px;line-height:1.85;color:var(--txt-2);overflow-y:auto;-webkit-overflow-scrolling:touch}
.modal-body p{margin:12px 0}
.modal-body b{color:var(--accent);font-weight:600}
.modal-note{color:var(--txt-3);font-size:11px;border-top:1px solid var(--line);padding-top:12px}
#toast{position:fixed;left:50%;bottom:58px;transform:translate(-50%,12px);z-index:70;padding:9px 16px;border-radius:6px;
  background:rgba(12,24,38,.95);border:1px solid var(--line-strong);font-size:12px;color:var(--txt);
  opacity:0;visibility:hidden;transition:.25s;box-shadow:0 10px 30px rgba(0,0,0,.5)}
#toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}

@media (max-width:1000px){
  #legend{display:none}
  #panel{width:262px;left:12px;top:64px;bottom:46px}
  #inspector{right:12px;width:min(410px,calc(100vw - 300px));bottom:46px}
  #inspector.maximized{left:12px;right:12px;top:62px;bottom:46px;width:auto}
}
@media (max-width:720px){
  #topbar{padding:0 10px;height:50px}
  .brand{gap:7px}
  .brand-mark{font-size:16px}
  .brand-name{font-size:16px}
  .brand-sub,.brand-tag{display:none}
  .top-actions{gap:6px}
  .ghost-btn{padding:6px 9px;font-size:11px}
  .panel-btn{display:inline-block}

  /* 左栏收进顶栏抽屉：默认收起，避免遮住地球与详图 */
  #panel{left:8px;right:8px;top:54px;bottom:auto;width:auto;max-height:min(56vh,460px);
    z-index:46;opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s;
    -webkit-overflow-scrolling:touch}
  #panel.open{opacity:1;visibility:visible;transform:none}

  #inspector{left:8px;right:8px;width:auto;bottom:calc(38px + env(safe-area-inset-bottom))}
  .insp-body{height:clamp(168px,32vh,280px)}
  .insp-tip{display:none;top:10px;left:50%;right:auto;transform:translateX(-50%);
    background:rgba(6,14,24,.82);padding:3px 8px;border-radius:3px;white-space:nowrap}
  .tip-pointer{display:none}
  .tip-touch{display:inline}
  .insp-foot{flex-wrap:wrap;gap:4px 12px;white-space:normal}
  #inspector.maximized{left:6px;right:6px;top:56px;bottom:calc(38px + env(safe-area-inset-bottom))}
  #inspector.maximized .insp-tip{display:block}

  #statusbar{height:calc(34px + env(safe-area-inset-bottom));gap:10px;
    padding:0 10px env(safe-area-inset-bottom);overflow-x:auto}
  .status-group:nth-child(3),.status-group:nth-child(5),.status-group.right{display:none}

  #toast{top:58px;bottom:auto;max-width:calc(100vw - 24px);font-size:11px;text-align:center}
}
@media (max-width:380px){
  .brand-mark{display:none}
  .ghost-btn{padding:6px 7px}
}