/* Will I Sleep Warm? — a small field tool. Plain CSS, no build step. */

:root {
  --pine: #1f3d2f;
  --pine-deep: #162c22;
  --moss: #3f6b52;
  --sand: #e9e3d5;
  --paper: #f7f4ee;
  --ink: #22271f;
  --muted: #5d6656;
  --amber: #d98a2b;
  --good: #2f7d4f;
  --warn: #c8871d;
  --bad: #b23b2e;
  --line: #d8d1c1;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 8px 24px rgba(0,0,0,.06);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

.wrap { width: min(860px, 92vw); margin-inline: auto; }

/* Header */
.site-header {
  background: linear-gradient(160deg, var(--pine) 0%, var(--pine-deep) 100%);
  color: var(--sand);
  padding: 1.6rem 0;
  border-bottom: 4px solid var(--amber);
}
.site-header h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  letter-spacing: -0.02em;
}

/* Form */
main { padding: 2rem 0 3rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 1.1rem 1.2rem 1.3rem;
  margin: 0;
  box-shadow: var(--shadow);
}
legend {
  /* float + full width pulls the legend out of the border so the card edge is
     unbroken and the title reads as a normal heading at the top of the card */
  float: left;
  width: 100%;
  padding: 0;
  margin: 0 0 .9rem;
  font-weight: 700;
  color: var(--pine);
  font-size: .95rem;
}
legend + * { clear: both; }

label {
  display: block;
  font-weight: 600;
  color: var(--ink);
  margin-top: .8rem;
  font-size: .93rem;
}
fieldset > label:first-of-type { margin-top: .2rem; }

input[type="number"], select {
  display: block;
  width: 100%;
  margin-top: .35rem;
  padding: .6rem .7rem;
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-weight: 500;
}
input[type="number"]:focus, select:focus {
  outline: 2px solid var(--moss);
  outline-offset: 1px;
  background: #fff;
}

small {
  display: block;
  margin-top: .35rem;
  font-weight: 400;
  color: var(--muted);
  font-size: .82rem;
}
.hint { margin: .1rem 0 .6rem; color: var(--muted); font-size: .85rem; }

.checks, .radios { display: flex; flex-direction: column; gap: .55rem; }
.check, .radio {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin: 0;
  font-weight: 500;
  cursor: pointer;
}
.check input, .radio input { width: 1.05rem; height: 1.05rem; accent-color: var(--moss); }

button#run {
  margin-top: 1.4rem;
  width: 100%;
  padding: .95rem 1rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: #fff;
  background: var(--moss);
  border: none;
  border-radius: 11px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background .15s ease, transform .05s ease;
}
button#run:hover { background: #35604a; }
button#run:active { transform: translateY(1px); }

/* Result */
.result {
  margin-top: 1.8rem;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: #fff;
}
.verdict {
  padding: 1.3rem 1.4rem;
  color: #fff;
}
.verdict.good { background: var(--good); }
.verdict.warn { background: var(--warn); }
.verdict.bad  { background: var(--bad); }
.verdict h2 { margin: 0 0 .25rem; font-size: 1.5rem; }
.verdict p { margin: 0; opacity: .95; }

.result-body { padding: 1.2rem 1.4rem 1.5rem; }

.numbers {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1rem;
}
.stat .k { display: block; font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.stat .v { display: block; font-size: 1.7rem; font-weight: 800; color: var(--pine); line-height: 1.1; }
.stat .v small { display: inline; font-size: .9rem; font-weight: 600; color: var(--muted); }

h3.sub { margin: 1.1rem 0 .5rem; font-size: 1rem; color: var(--pine); }

ul.recs, ul.breakdown { margin: .3rem 0 0; padding-left: 1.1rem; }
ul.recs li { margin: .4rem 0; }
ul.breakdown { list-style: none; padding-left: 0; }
ul.breakdown li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .35rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: .92rem;
}
ul.breakdown .amt { font-variant-numeric: tabular-nums; font-weight: 700; white-space: nowrap; }
.amt.help { color: var(--good); }
.amt.hurt { color: var(--bad); }
.amt.zero { color: var(--muted); }

.err { color: var(--bad); font-weight: 600; padding: 1rem 1.4rem; margin: 0; }

main { padding-bottom: 3rem; }

@media (max-width: 620px) {
  .grid { grid-template-columns: 1fr; }
}