:root {
  --bg: #0b1020;
  --panel: #131a2e;
  --panel-2: #1b2440;
  --ink: #e7ecf6;
  --dim: #94a3b8;
  --line: #2a3555;
  --sky: #38bdf8;
  --sun: #f59e0b;
  --wind: #a78bfa;
  --good: #34d399;
  --bad: #f87171;
  --compute: #38bdf8;
  font-size: 15px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 70% -10%, #16203c 0%, var(--bg) 55%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 1.6rem 1rem;
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; gap: 1rem; align-items: flex-start; max-width: 60rem; }
.logo {
  width: 40px; height: 40px; flex: 0 0 40px; margin-top: 2px; border-radius: 10px;
  background: radial-gradient(circle at 50% 50%, var(--sky) 0 5px, transparent 6px),
              conic-gradient(from 0deg, var(--sun), var(--sky), var(--wind), var(--sun));
  box-shadow: 0 0 18px rgba(56,189,248,.35);
}
h1 { font-size: 1.35rem; margin: 0; letter-spacing: .2px; }
h2 { font-size: 1rem; margin: 0 0 .7rem; color: var(--ink); text-transform: uppercase; letter-spacing: .08em; }
.dim { color: var(--dim); font-weight: 400; }
.sub { margin: .35rem 0 0; color: var(--dim); font-size: .9rem; max-width: 56rem; }

.served {
  font-size: .72rem; padding: .3rem .6rem; border-radius: 999px; white-space: nowrap;
  border: 1px solid var(--line); background: var(--panel); color: var(--dim);
}
.served.platform { color: var(--good); border-color: rgba(52,211,153,.4); }
.served.in-process { color: var(--sun); border-color: rgba(245,158,11,.4); }

main { padding: 1.2rem 1.6rem 3rem; display: grid; gap: 1.2rem; max-width: 1200px; margin: 0 auto; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.2rem;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem 1.4rem;
}
label { display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; color: var(--dim); }
label b { color: var(--ink); }
input[type=range] { width: 100%; accent-color: var(--sky); }
select {
  background: var(--panel-2); color: var(--ink); border: 1px solid var(--line);
  border-radius: 8px; padding: .4rem .5rem; font-size: .85rem;
}
.scale { display: flex; justify-content: space-between; font-size: .68rem; color: var(--dim); }
.hint-sm { font-size: .7rem; color: var(--dim); }
.hint { color: var(--dim); font-size: .82rem; margin: 0 0 .8rem; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .8rem; margin-top: 1.1rem; }
.kpi {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px;
  padding: .7rem .8rem;
}
.kpi .k { font-size: .68rem; color: var(--dim); text-transform: uppercase; letter-spacing: .06em; }
.kpi .v { font-size: 1.25rem; font-weight: 700; margin-top: .15rem; }
.kpi .v.good { color: var(--good); }
.kpi .v.bad { color: var(--bad); }
.kpi .note { font-size: .68rem; color: var(--dim); margin-top: .1rem; }

/* swatches + legend */
.sw { display: inline-block; width: .8rem; height: .8rem; border-radius: 3px; vertical-align: -1px; margin: 0 .1rem 0 .4rem; }
.sw.compute { background: var(--compute); }
.sw.solar { background: var(--sun); }
.sw.wind { background: var(--wind); }
.sw.strand { background: var(--bad); }

#fleet-svg, #scale-svg { width: 100%; display: block; }
.scale-wrap { display: grid; grid-template-columns: 1fr 250px; gap: 1rem; align-items: start; }
.scale-readout { font-size: .8rem; color: var(--dim); }
.scale-readout .row { display: flex; justify-content: space-between; padding: .25rem 0; border-bottom: 1px dashed var(--line); }
.scale-readout .row b { color: var(--ink); }
.scale-readout .tag { margin-top: .6rem; padding: .5rem .6rem; border-radius: 8px; font-size: .78rem; }
.scale-readout .tag.good { background: rgba(52,211,153,.12); color: var(--good); border: 1px solid rgba(52,211,153,.35); }
.scale-readout .tag.bad { background: rgba(248,113,113,.12); color: var(--bad); border: 1px solid rgba(248,113,113,.35); }

/* d3 chart bits */
.axis text { fill: var(--dim); font-size: 11px; }
.axis path, .axis line { stroke: var(--line); }
.gridline { stroke: var(--line); stroke-dasharray: 2 3; opacity: .5; }
.serie-label { font-size: 11px; font-weight: 600; }

.hh-link { color: var(--sky); cursor: pointer; border-bottom: 1px dotted var(--sky); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }

footer { padding: 1.2rem 1.6rem 2rem; color: var(--dim); font-size: .78rem; border-top: 1px solid var(--line); text-align: center; }

/* modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(4,8,18,.7); display: none; align-items: center; justify-content: center; padding: 1rem; }
.modal-overlay.open { display: flex; }
.modal { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; max-width: 40rem; padding: 1.4rem 1.6rem; position: relative; }
.modal h3 { margin: 0 0 .6rem; }
.modal-body p { color: var(--dim); font-size: .88rem; }
.modal .close { position: absolute; top: .6rem; right: .8rem; background: none; border: none; color: var(--dim); font-size: 1.4rem; cursor: pointer; }

/* splash password gate */
.gate-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 1rem;
  background: radial-gradient(1200px 600px at 70% -10%, #16203c 0%, var(--bg) 55%);
}
.gate-overlay.hidden { display: none; }
.gate-card {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: .55rem; width: min(24rem, 100%);
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 2rem 1.8rem 1.8rem;
  box-shadow: 0 24px 60px rgba(4,8,18,.55);
}
.gate-card .logo { margin: 0 0 .3rem; }
.gate-title { margin: 0; text-transform: none; letter-spacing: .2px; font-size: 1.4rem; }
.gate-tag { margin: 0 0 .5rem; color: var(--dim); font-size: .8rem; }
.gate-input {
  width: 100%; background: var(--panel-2); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px; padding: .6rem .7rem;
  font-size: .95rem; text-align: center; letter-spacing: .12em;
}
.gate-input:focus { outline: none; border-color: var(--sky); box-shadow: 0 0 0 3px rgba(56,189,248,.18); }
.gate-submit {
  width: 100%; margin-top: .2rem; cursor: pointer;
  background: var(--sky); color: #06121f; border: none; border-radius: 10px;
  padding: .55rem .7rem; font-size: .9rem; font-weight: 700; letter-spacing: .03em;
}
.gate-submit:hover { filter: brightness(1.08); }
.gate-error { margin: .1rem 0 0; color: var(--bad); font-size: .78rem; min-height: 1rem; }
.gate-card.shake { animation: gate-shake .4s ease; }
@keyframes gate-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(7px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(3px); }
}

/* re-solve feedback: pulse the badge while solving */
.served.solving { color: var(--sky); border-color: rgba(56,189,248,.4); animation: badge-pulse 1s ease-in-out infinite; }
.served.failed { color: var(--bad); border-color: rgba(248,113,113,.5); }
@keyframes badge-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }

/* solving modal -- shown only when a solve is slow (a cold container boot), not on warm
   ~0.25s solves. Makes it unmistakable that the demo is working while the solver warms. */
.solving-overlay {
  position: fixed; inset: 0; z-index: 90; display: none;
  align-items: center; justify-content: center; padding: 1rem;
  background: rgba(4,8,18,.62);
}
.solving-overlay.show { display: flex; }
.solving-card {
  display: flex; flex-direction: column; align-items: center; gap: .75rem;
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.6rem 2rem; box-shadow: 0 24px 60px rgba(4,8,18,.55);
}
.spinner {
  width: 34px; height: 34px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--sky);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.solving-text { font-size: .98rem; font-weight: 700; letter-spacing: .01em; }
.solving-sub { font-size: .74rem; color: var(--dim); }

@media (max-width: 720px) {
  .scale-wrap { grid-template-columns: 1fr; }
  header { flex-direction: column; }
}