/* Ferramentas — mesma identidade do portfólio: preto e branco, Geist, cantos retos, filetes finos. */
:root{
  --bg:#fff; --fg:#0a0a0a; --muted:#666; --soft:#f3f3f3; --line:#e2e2e2;
  --font-sans:'Geist',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --font-mono:'Geist Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-sans);font-size:16px;line-height:1.5;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow:hidden}
::selection{background:var(--fg);color:var(--bg)}
:focus-visible{outline:2px solid currentColor;outline-offset:3px}

.app{display:grid;grid-template-columns:380px 1fr;height:100vh}
.panel{background:var(--bg);border-right:1px solid var(--line);padding:24px 24px 28px;overflow-y:auto}
.stage{background:var(--soft);position:relative;overflow:hidden}
#view{position:absolute;inset:0;width:100%;height:100%;display:block}

.back{display:inline-block;margin-bottom:20px;font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;
  text-transform:uppercase;color:var(--muted);text-decoration:none}
.back:hover{color:var(--fg);text-decoration:underline;text-underline-offset:3px}
h1{margin:0;font-size:28px;font-weight:500;letter-spacing:-.025em;line-height:1.1}
h1 span{font-weight:300}
.sub{margin:8px 0 0;font-size:15px;line-height:1.45;color:var(--muted)}
section{border-top:1px solid var(--line);margin-top:24px;padding-top:18px}
.sec{font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}

.btn{display:flex;align-items:center;justify-content:center;gap:.6em;width:100%;cursor:pointer;
  border:1px solid var(--fg);border-radius:0;font:inherit;font-size:16px;font-weight:500;letter-spacing:-.005em;
  padding:14px 22px;transition:background .25s var(--ease),color .25s var(--ease),opacity .15s}
.btn:disabled{opacity:.4;cursor:default}
.btn.dark,.btn.blue{background:var(--fg);color:var(--bg)}
.btn.dark:hover:not(:disabled),.btn.blue:hover:not(:disabled){background:var(--bg);color:var(--fg)}
.btn.soft{background:var(--bg);color:var(--fg);margin-top:10px}
.btn.soft:hover:not(:disabled){background:var(--fg);color:var(--bg)}
.btn.blue{width:auto;white-space:nowrap}
.btn.mini{background:transparent;color:var(--muted);border:0;width:auto;padding:4px 0;font-size:15px;font-weight:400;
  justify-content:flex-start;text-decoration:underline;text-underline-offset:3px;margin-top:10px}
.btn.mini:hover{color:var(--fg)}

.row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:15px;font-weight:500;margin-top:16px}
.row.first{margin-top:0}
.row label{color:var(--fg)}
.row output{font-family:var(--font-mono);font-size:13px;color:var(--fg);font-variant-numeric:tabular-nums;white-space:nowrap}
.row.off{opacity:.4}

input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:24px;background:transparent;margin:4px 0 0;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:1px;background:var(--fg)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:0;background:var(--fg);border:0;margin-top:-6.5px}
input[type=range]::-moz-range-track{height:1px;background:var(--fg)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:0;background:var(--fg);border:0}
input[type=range]:disabled{opacity:.4;cursor:default}

.mode{display:flex;gap:10px;align-items:stretch}
select,textarea,input[type=password]{font:inherit;font-size:16px;font-weight:400;color:var(--fg);background:var(--bg);
  border:1px solid var(--fg);border-radius:0;padding:12px 14px;width:100%;outline:none}
select{-webkit-appearance:none;appearance:none;flex:1;min-width:0;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%230a0a0a' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:34px}
select:focus-visible,textarea:focus-visible,input[type=password]:focus-visible{outline:2px solid var(--fg);outline-offset:2px}
textarea{resize:vertical;min-height:72px;margin-top:10px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.two select{width:100%}
.w100{width:100%}.mt8{margin-top:10px}

.status{font-size:14px;color:var(--muted);margin:10px 0 0;min-height:14px;line-height:1.4}
.status.err{color:var(--fg);text-decoration:underline;text-underline-offset:3px}
details{margin-top:10px;font-size:14px;color:var(--muted)}
details summary{cursor:pointer;font-weight:500}
details .in{margin-top:10px;display:grid;gap:10px}
details small,.note{font-size:14px;line-height:1.45;color:var(--muted)}
.note{margin:8px 0 0}
.dim{font-family:var(--font-mono);font-size:13px;color:var(--muted);margin:10px 0 0;font-variant-numeric:tabular-nums}

.chk{display:flex;justify-content:space-between;align-items:center;font-size:16px;padding:6px 0;cursor:pointer}
.chk input{-webkit-appearance:none;appearance:none;width:20px;height:20px;border:1px solid var(--fg);border-radius:0;
  background:var(--bg);margin:0;cursor:pointer;display:grid;place-items:center}
.chk input:checked{background:var(--fg)}
.chk input:checked::after{content:"";width:10px;height:5px;border-left:2px solid var(--bg);border-bottom:2px solid var(--bg);transform:rotate(-45deg) translate(1px,-1px)}
.exp{display:flex;gap:10px}
.hint{margin-top:20px;border-top:1px solid var(--line);padding-top:14px;font-size:14px;line-height:1.5;color:var(--muted)}

.empty{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:18px;text-align:center;
  color:var(--muted);font-size:16px;padding:24px}
.empty.hide{display:none}
.empty .btn{width:auto}
.stage.drag{outline:2px dashed var(--fg);outline-offset:-12px}
.hidden{display:none!important}

@media(max-width:860px){
  body{overflow:auto;height:auto}
  .app{grid-template-columns:1fr;height:auto}
  .stage{height:75vh;order:-1}
  .panel{overflow:visible;border-right:0}
}