:root {
  --bg: #f6f5f1;
  --card: #ffffff;
  --ink: #1d2027;
  --muted: #6b7280;
  --line: #e3e1da;
  --sun: #e8a33d;
  --sun-soft: #fbf1de;
  --good: #2f8f5b;
  --warn: #c9752a;
  --bad: #b8433a;
  --cool: #4a7fb5;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c; --card: #1e2126; --ink: #e8e6e1; --muted: #9aa0aa;
    --line: #2e323a; --sun-soft: #2a2318;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--bad); min-height: 1.2em; }

/* ------------------------------------------------------------------ login */
.login { display: grid; place-items: center; min-height: 100vh; padding: 20px; }
.login-card { width: 320px; text-align: center; }
.login-card .login-mark {
  width: 84px; height: 84px; display: block; margin: 2px auto 12px;
  border-radius: 18px; background: #00011c;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.10);
}
.login-card h1 { margin: 0 0 4px; font-size: 26px; }
.login-card input {
  width: 100%; margin: 18px 0 10px; padding: 12px; font-size: 22px;
  text-align: center; letter-spacing: 6px;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink);
}

/* ----------------------------------------------------------------- shell */
header {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  justify-content: space-between;
  padding: 14px 20px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
/* The logo is artwork on its own dark navy ground, so it is presented as a
   rounded chip rather than floated on the header — the ring keeps its edge
   readable in dark mode, where navy-on-#1e2126 is nearly no contrast. */
.brand .mark {
  width: 34px; height: 34px; flex: none; display: block;
  border-radius: 8px; background: #00011c;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.10);
}
.brand div { display: flex; flex-direction: column; line-height: 1.25; }
.brand .muted { font-size: 12px; }
nav { display: flex; gap: 6px; flex-wrap: wrap; }
nav button {
  border: 1px solid transparent; background: none; color: var(--muted);
  padding: 7px 12px; border-radius: 8px; cursor: pointer; font: inherit;
}
nav button:hover { background: var(--bg); }
nav button.active { background: var(--sun-soft); color: var(--ink); border-color: var(--sun); }
main { padding: 20px; max-width: 1200px; margin: 0 auto; }
footer { padding: 24px 20px 48px; max-width: 720px; margin: 0 auto; font-size: 13px; }

/* ----------------------------------------------------------------- cards */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin-bottom: 16px;
}
.card h2 { margin: 0 0 2px; font-size: 18px; }
.card h3 { margin: 18px 0 8px; font-size: 14px; text-transform: uppercase;
           letter-spacing: 0.06em; color: var(--muted); }

.array-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.spec { font-size: 13px; color: var(--muted); }

/* --------------------------------------------------------------- verdict */
.verdict { border-left: 4px solid var(--line); padding: 12px 14px; border-radius: 6px;
           background: var(--bg); margin: 14px 0; }
.verdict.healthy { border-color: var(--good); }
.verdict.soiling { border-color: var(--warn); }
.verdict.shading { border-color: var(--cool); }
.verdict.curtailment { border-color: var(--sun); }
.verdict.fault, .verdict.sensor_suspect { border-color: var(--bad); }
.verdict.insufficient_data { border-color: var(--muted); }
.verdict strong { display: block; margin-bottom: 4px; }
.verdict p { margin: 6px 0 0; font-size: 13.5px; color: var(--muted); }
.badge { display: inline-block; font-size: 11px; text-transform: uppercase;
         letter-spacing: 0.06em; padding: 2px 7px; border-radius: 99px;
         background: var(--sun-soft); color: var(--ink); }

/* --------------------------------------------------------------- figures */
.figures { display: flex; flex-wrap: wrap; gap: 22px; margin: 14px 0 4px; }
.figure { min-width: 108px; }
.figure .n { font-size: 24px; font-weight: 600; }
.figure .l { font-size: 12px; color: var(--muted); }
.n.good { color: var(--good); } .n.warn { color: var(--warn); } .n.bad { color: var(--bad); }

/* ----------------------------------------------------------------- chart */
svg.chart { width: 100%; height: auto; display: block; }
svg .axis { stroke: var(--line); stroke-width: 1; }
svg .lab { fill: var(--muted); font-size: 10px; }
svg .band { fill: var(--sun); opacity: 0.15; }
svg .pred { fill: none; stroke: var(--sun); stroke-width: 2; }
svg .act { fill: none; stroke: var(--good); stroke-width: 2; }
svg .soc { fill: none; stroke: var(--cool); stroke-width: 1.5; stroke-dasharray: 3 3; }
svg .bar-pred { fill: var(--sun); opacity: 0.35; }
svg .bar-act { fill: var(--good); }
svg .bar-miss { fill: var(--bad); opacity: 0.55; }
.legend { display: flex; gap: 16px; font-size: 12px; color: var(--muted); margin-top: 8px;
          flex-wrap: wrap; }
.legend i { display: inline-block; width: 12px; height: 3px; margin-right: 5px;
            vertical-align: middle; border-radius: 2px; }

/* ---------------------------------------------------------------- tables */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase;
     letter-spacing: 0.04em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.excluded td { opacity: 0.5; }
.tag { font-size: 11px; padding: 1px 6px; border-radius: 99px; background: var(--bg);
       border: 1px solid var(--line); margin-right: 4px; }

/* ----------------------------------------------------------------- forms */
form.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
input, select, textarea {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 7px;
  background: var(--bg); color: var(--ink); font: inherit;
}
button {
  padding: 9px 14px; border-radius: 8px; border: 1px solid var(--sun);
  background: var(--sun); color: #241a08; font: inherit; font-weight: 600; cursor: pointer;
}
button.ghost { background: none; border-color: var(--line); color: var(--muted); font-weight: 400; }
button:disabled { opacity: 0.5; cursor: default; }
.note { font-size: 13px; color: var(--muted); margin: 8px 0 0; }
.ok { color: var(--good); }