:root{
  --bg:#f8fbff;
  --panel:#fff;
  --text:#14213a;
  --muted:#66758f;
  --line:#e5eaf2;
  --line-strong:#d8dfeb;
  --shadow:0 10px 34px rgba(28,42,73,.07);

  --blue:#3f7fdf;
  --blue2:#315fae;
  --blue-soft:#edf3fa;

  --purple:#8069c7;
  --purple2:#654cae;
  --purple-soft:#f2eff8;

  --green:#2e9870;
  --green2:#176e50;
  --green-soft:#edf5f1;

  --orange:#d57b39;
  --orange2:#af5720;
  --orange-soft:#f8f1e9;

  --cyan:#168ea9;
  --cyan-soft:#eef9fb;

  --danger:#c35656;
}

*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text)}
body{
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(circle at 12% 0%, rgba(63,127,223,.11), transparent 28%),
    radial-gradient(circle at 92% 12%, rgba(112,89,202,.08), transparent 24%),
    var(--bg);
}

button,input,select{font:inherit}
input[type="number"]{-moz-appearance:textfield;appearance:textfield}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button{-webkit-appearance:none;appearance:none;margin:0}

.app{max-width:1440px;margin:0 auto;padding:34px 34px 54px}

.header{
  display:flex;align-items:flex-start;justify-content:space-between;
  gap:24px;margin-bottom:24px;
}
.title h1{font-size:30px;line-height:1.15;letter-spacing:-.8px;margin:0;font-weight:760}
.title .subtitle{
  margin-top:8px;font-size:16px;font-weight:650;letter-spacing:.2px;color:#627087
}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.select,.btn{
  height:42px;border:1px solid var(--line);background:#fff;color:var(--text);
  border-radius:12px;padding:0 14px;outline:none;
}
.select{min-width:106px;height:40px;border-radius:10px;padding:0 10px}
.btn{cursor:pointer;transition:.18s ease}
.btn:hover{transform:translateY(-1px);box-shadow:0 7px 18px rgba(25,40,64,.07)}
.btn.primary{background:var(--blue);border-color:var(--blue);color:white;padding:0 22px}
.btn.ghost-danger{color:var(--danger)}

.hero{
  background:rgba(255,255,255,.9);border:1px solid rgba(220,227,237,.95);
  border-radius:24px;box-shadow:var(--shadow);padding:26px;backdrop-filter:blur(10px);
}
.hero-top{
  display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:18px
}
.hero-top strong{font-size:16px}
.legend{display:flex;gap:16px;color:var(--muted);font-size:12px;flex-wrap:wrap}
.legend span{display:flex;align-items:center;gap:7px}
.legend i{display:inline-block;width:11px;height:11px;border-radius:4px}
.legend .known{background:#3465c4}
.legend .unknown{background:#f3f6fa;border:1px solid #cbd5e2}
.legend .calc{background:#fff;border:2px solid #7da3ea}

.grid{
  display:grid;
  grid-template-columns:1.55fr 1fr 1fr 1fr;
  gap:16px;
  align-items:stretch;
}

.card{
  --accent:var(--blue);
  --accent2:var(--blue2);
  --soft:var(--blue-soft);
  border:1px solid color-mix(in srgb,var(--accent) 22%, white);
  background:var(--soft);
  border-radius:20px;
  min-height:230px;
  padding:20px;
  position:relative;
  transition:.2s ease;
  cursor:pointer;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.7);
}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(34,49,75,.07)}
.card.blue{--accent:var(--blue);--accent2:var(--blue2);--soft:var(--blue-soft)}
.card.purple{--accent:var(--purple);--accent2:var(--purple2);--soft:var(--purple-soft)}
.card.green{--accent:var(--green);--accent2:var(--green2);--soft:var(--green-soft)}
.card.orange{--accent:var(--orange);--accent2:var(--orange2);--soft:var(--orange-soft)}

.card.known{
  background:linear-gradient(145deg,var(--accent),var(--accent2));
  border-color:transparent;color:white;
  box-shadow:0 13px 28px color-mix(in srgb,var(--accent) 18%, transparent);
}
.card.calculated:not(.known){
  border-color:color-mix(in srgb,var(--accent) 58%, white);
  box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 14%, transparent);
}
.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.card-title{font-weight:740;font-size:15px}
.card-en{font-size:11px;color:var(--muted);margin-top:3px;letter-spacing:.2px}
.card.known .card-en{color:rgba(255,255,255,.7)}
.state{
  font-size:10px;padding:4px 8px;border-radius:999px;background:rgba(255,255,255,.72);
  color:var(--accent);white-space:nowrap
}
.card.known .state{background:rgba(255,255,255,.14);color:white}

.geometry-card{padding-bottom:16px}
.geo-table{margin-top:16px;display:grid;gap:10px}
.geo-row{
  display:grid;grid-template-columns:82px minmax(90px,1fr) 92px;gap:10px;align-items:center;
  padding:8px 10px;border-radius:13px;background:rgba(255,255,255,.46);
  border:1px solid rgba(255,255,255,.45);
}
.card.known .geo-row{background:rgba(255,255,255,.11);border-color:rgba(255,255,255,.11)}
.geo-label{font-size:12px;font-weight:650}
.geo-label small{display:block;font-size:9px;font-weight:500;color:var(--muted);margin-top:2px}
.card.known .geo-label small{color:rgba(255,255,255,.62)}

.value-line{
  display:grid;grid-template-columns:minmax(0,1fr) 92px;align-items:center;
  gap:10px;margin-top:36px
}
.big-input,.geo-input{
  width:100%;height:42px;min-width:0;border:1px solid transparent;border-radius:10px;
  outline:none;background:transparent;color:var(--text);padding:0 10px;
  font-weight:700;letter-spacing:-.25px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.big-input{font-size:24px;line-height:1}
.geo-input{height:40px;font-size:17px}
.big-input::placeholder,.geo-input::placeholder{color:color-mix(in srgb,var(--accent) 35%, #9ba7b8)}
.big-input:hover,.geo-input:hover,
.big-input:not(:placeholder-shown),.geo-input:not(:placeholder-shown){
  border-color:transparent;background:#fff
}
.big-input:focus,.geo-input:focus{
  background:#fff;
  border-color:transparent;box-shadow:0 0 0 3px rgba(63,127,223,.16)
}
.eff-input:focus,.select:focus{
  background:#fff;
  border-color:var(--blue);box-shadow:0 0 0 3px rgba(63,127,223,.12)
}
.card.known .big-input:not(:placeholder-shown),
.card.known .geo-input:not(:placeholder-shown),
.card.known .big-input:focus,
.card.known .geo-input:focus{
  background:rgba(255,255,255,.96);border-color:transparent;color:var(--accent2)
}
.card.known .big-input::placeholder,.card.known .geo-input::placeholder{color:color-mix(in srgb,var(--accent) 38%, #a7b2c2)}

.unit-select{
  width:92px;height:40px;min-width:92px;border:1px solid transparent;color:var(--accent2);
  appearance:none;-webkit-appearance:none;border-radius:999px;padding:0 30px 0 12px;
  outline:none;cursor:pointer;font-size:11px;font-weight:700;text-align:center;
  background-color:color-mix(in srgb,var(--accent) 9%, #fff);
  background-image:
    linear-gradient(45deg,transparent 50%,#7b869b 50%),
    linear-gradient(135deg,#7b869b 50%,transparent 50%);
  background-position:calc(100% - 15px) 50%,calc(100% - 10px) 50%;
  background-size:5px 5px,5px 5px;background-repeat:no-repeat;
  transition:background-color .18s ease,color .18s ease;
}
.unit-select:hover,.unit-select:focus,.unit-select:active{
  border-color:transparent;box-shadow:none;
  background-color:color-mix(in srgb,var(--accent) 16%, #fff)
}
.card.known .unit-select{
  background-color:rgba(255,255,255,.88);border-color:transparent;color:var(--accent2)
}
.card.known .unit-select:hover,
.card.known .unit-select:focus,
.card.known .unit-select:active{
  background-color:#fff;border-color:transparent;box-shadow:none
}
.unit-select option{padding:8px 10px;border-radius:8px;color:var(--text);background:#fff;font-weight:600}
.unit-select option:checked{color:var(--blue2);background:var(--blue-soft)}
.unit-select:disabled{cursor:default;opacity:.72}
.card-foot{margin-top:22px;font-size:11px;color:var(--muted);line-height:1.5}
.card.known .card-foot{color:rgba(255,255,255,.68)}

.options-row{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px
}
.option-panel{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:17px 18px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.option-main{display:flex;align-items:center;gap:13px}
.switch{position:relative;width:44px;height:24px;flex:0 0 auto}
.switch input{display:none}
.slider{position:absolute;inset:0;background:#cbd4df;border-radius:999px;cursor:pointer;transition:.2s}
.slider:before{
  content:"";position:absolute;width:18px;height:18px;left:3px;top:3px;border-radius:50%;
  background:white;box-shadow:0 2px 7px rgba(0,0,0,.14);transition:.2s
}
.switch input:checked + .slider{background:var(--cyan)}
.switch input:checked + .slider:before{transform:translateX(20px)}
.option-title{font-size:13px;font-weight:720}
.option-sub{font-size:11px;color:var(--muted);margin-top:3px}
.eff-input-wrap{display:flex;align-items:center;gap:5px}
.eff-input{
  width:72px;height:40px;border:1px solid var(--line);border-radius:10px;padding:0 10px;
  background:#fff;color:var(--text);font-weight:700;outline:none;
  transition:border-color .18s ease,box-shadow .18s ease
}

.lower{
  display:grid;grid-template-columns:.72fr 1.28fr;gap:18px;margin-top:18px
}
.panel{
  background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:22px
}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.panel-head strong{font-size:15px}
.tag{
  font-size:10px;color:#627087;background:#eef2f7;border-radius:999px;padding:5px 9px
}
.status{
  margin-top:16px;min-height:128px;border-radius:15px;background:#f7f9fc;color:#69768a;
  padding:15px 16px;font-size:13px;line-height:1.75
}
.status.success{background:#eef9f4;color:#327158}
.status.warning{background:#fff7e9;color:#8a661e}
.chart-wrap{height:325px;margin-top:12px}
canvas{width:100%;height:100%;display:block}
.chart-note{font-size:11px;color:var(--muted);margin-top:7px;line-height:1.5}

.history{
  margin-top:18px;border-top:1px solid var(--line);padding-top:14px
}
.history-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.history-title{font-size:12px;font-weight:720}
.history-count{font-size:10px;color:var(--muted)}
.history-list{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.history-chip{
  font-size:10px;padding:6px 8px;border:1px solid var(--line);border-radius:999px;background:#fafbfd;color:#56647a
}

.site-footer{
  min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:14px clamp(22px,4.8vw,72px);border-top:1px solid var(--line);
  color:var(--muted);background:var(--bg);font-size:9px;font-weight:600;letter-spacing:.12em
}
.site-footer nav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:12px 24px}
.site-footer a{color:var(--muted);font-size:9px;font-weight:500;letter-spacing:.08em;text-decoration-color:transparent}
.site-footer a:hover,.site-footer a:focus-visible{color:var(--text);text-decoration-color:currentColor;text-underline-offset:4px}

@media(max-width:1050px){
  .grid{grid-template-columns:1fr 1fr}
  .geometry-card{grid-column:1/-1}
  .lower{grid-template-columns:1fr}
}
@media(max-width:680px){
  .app{padding:20px 14px 36px}
  .header{flex-direction:column}
  .toolbar{width:100%;justify-content:flex-start}
  .grid{grid-template-columns:1fr}
  .geometry-card{grid-column:auto}
  .options-row{grid-template-columns:1fr}
  .geo-row{grid-template-columns:72px minmax(0,1fr) 92px}
  .title h1{font-size:25px}
  .site-footer{min-height:44px;display:block;padding:10px 12px max(10px,env(safe-area-inset-bottom));font-size:0}
  .site-footer>span{display:none}
  .site-footer nav{display:grid;grid-template-columns:max-content max-content;justify-content:center;gap:6px;white-space:nowrap}
  .site-footer a{font-size:clamp(6.5px,2vw,9px);letter-spacing:.02em;line-height:1}
}