:root{
  --bg:#0f1115;
  --panel:#171a21;
  --card:#11151c;
  --muted:#8b93a7;
  --text:#e6e9ef;
  --accent:#23c55e;
  --accent-600:#16a34a;
  --accent-700:#15803d;
  --danger:#ef4444;
  --border: #232836;
  --shadow: 0 10px 25px rgba(0,0,0,.4), 0 2px 8px rgba(0,0,0,.3);
  color-scheme: dark;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:16px "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color:var(--text);
  background:radial-gradient(1200px 800px at 20% -10%, #1a1f2b 0%, transparent 60%),
             radial-gradient(800px 600px at 110% 10%, #0f1b23 0%, transparent 60%),
             var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app-header{position:sticky;top:0;background:rgba(15,17,21,.7);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:10}
.tabs{display:flex;gap:10px;align-items:center;max-width:1100px;margin:0 auto;padding:14px 16px}
.brand{display:inline-flex;align-items:center;gap:10px;margin-right:6px;padding:8px 10px;border-radius:12px;border:1px solid transparent;color:var(--text);text-decoration:none}
.brand:hover{border-color:#283047;background:#0f1520}
.brand-logo{filter: drop-shadow(0 6px 18px rgba(35,197,94,.25)); border-radius:10px}
.brand-wrap{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:700;letter-spacing:.2px}
.brand-tag{font-size:.85rem;color:var(--muted);margin-top:2px}
.tab{appearance:none;border:1px solid var(--border);background:linear-gradient(180deg, #121823, #0e1420);color:var(--text);padding:10px 16px;border-radius:14px;cursor:pointer;transition:all .2s}
.tab.is-active{background:#1d2230;border-color:#2d3347;box-shadow:inset 0 0 0 1px #2d3347}
.tab[disabled]{opacity:.45;cursor:not-allowed}
.tabs .spacer{flex:1}

.container{max-width:1100px;margin:28px auto;padding:0 16px;display:grid;gap:26px}
.panel{background:linear-gradient(180deg, #151924, #121620);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:16px;padding:18px}
.input-panel .input-row{display:flex;gap:12px}
.label{display:block;margin:0 0 8px 2px;color:var(--muted);font-size:.9rem;font-weight:500}
.input{flex:1;min-width:240px;background:#0e1220;color:var(--text);border:1px solid #263046;border-radius:12px;padding:16px 16px;font-size:1.075rem;outline:none;height:50px}
.input:focus{border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.15)}
.select{width:100%;background:#0e1220;color:var(--text);border:1px solid #263046;border-radius:12px;padding:12px 12px;font-size:1rem;height:46px}

.btn{appearance:none;border:1px solid #2a3349;background:#141927;color:var(--text);padding:12px 16px;border-radius:12px;cursor:pointer;height:50px;transition:all .2s;font-weight:600}
.btn:hover{border-color:#3a4666;transform:translateY(-1px)}
.btn.primary{background:linear-gradient(180deg, #1c5f33, #124e29);border-color:#1f5935}
.btn.primary:hover{background:linear-gradient(180deg, var(--accent-600), var(--accent-700));border-color:#2b7a4b}
.btn.subtle{background:transparent;border-color:#2a3349}
.btn.icon{font-size:.9rem}

.grid-results{display:grid;grid-template-columns:repeat(2, minmax(0,1fr));gap:18px}
@media (max-width: 800px){.grid-results{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg, #0e1420, #0b111a);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.row-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.row-title h3{font-size:1rem;font-weight:600;margin:0}
.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}
.big{font-size:1.2rem;letter-spacing:.2px}
.muted{color:var(--muted);margin-top:8px}

.controls{display:grid;grid-template-columns:1fr 1fr auto;gap:18px;align-items:end}
@media (max-width: 800px){.controls{grid-template-columns:1fr}}
.field{display:block}
.actions{display:flex;align-items:center;gap:12px}
.status{color:var(--muted)}

.app-footer{max-width:1100px;margin:24px auto 40px;padding:0 16px;display:flex;justify-content:space-between;color:var(--muted)}
.footer-copy{font-size:.75rem;opacity:.8}
.link{color:#8ab4ff;text-decoration:none}
.link:hover{text-decoration:underline}
.footer-links{display:flex;flex-direction:column;align-items:flex-end}
.footer-links .github{display:inline-flex}
.footer-links .spec-hidden{color:transparent;text-decoration:none;margin-top:6px}
.footer-links .spec-hidden:hover{color:transparent}