/* price-compare — mobile-first baseline (adapted from
   ~/coding-master/patterns/ui/code/mobile-first-css-baseline). */
:root {
  --paper: #f7f5f1;
  --card: #ffffff;
  --ink: #1b1f27;
  --ink-soft: #5b6473;
  --line: #dcd8d0;
  --accent: #1f6f4a;
  --accent-ink: #ffffff;
  --warn: #8a4b12;
  --danger: #9b2226;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 20, 20, .06), 0 6px 18px rgba(20, 20, 20, .05);
  --tap-min: 44px;
  --tap: 48px;
  --c1: #1f6f4a; --c2: #2f6f9b; --c3: #b07d2a; --c4: #7a5aa8;
  --c5: #a2544a; --c6: #4a7a5f; --c7: #6b6f7a; --c8: #99628a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12151b;
    --card: #1a1f28;
    --ink: #e9ecf1;
    --ink-soft: #9aa4b3;
    --line: #2c333f;
    --accent: #3fa877;
    --accent-ink: #0c1410;
    --warn: #e0a35c;
    --danger: #e0716f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .5);
    --c1: #3fa877; --c2: #5aa3d0; --c3: #d8ab55; --c4: #a58ad8;
    --c5: #d88a80; --c6: #6fb694; --c7: #98a2b1; --c8: #cf94bd;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: none;
  touch-action: manipulation;
}
.shell {
  max-width: 760px;
  margin: 0 auto;
  padding: max(12px, env(safe-area-inset-top)) 12px calc(28px + env(safe-area-inset-bottom));
}
h1 { font-size: 1.35rem; margin: .2rem 0 .1rem; letter-spacing: -.01em; }
h2 { font-size: 1rem; margin: 0; }
h3 { font-size: .95rem; margin: 1rem 0 .35rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .06em; }
.top { padding: 4px 2px 10px; }
.tag { margin: .35rem 0 0; color: var(--ink-soft); font-size: .88rem; }

.card, details.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  margin: 0 0 14px;
}
details.card > summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  min-height: var(--tap-min);
}
details.card > summary::-webkit-details-marker { display: none; }
details.card > summary::after { content: "▾"; margin-left: auto; color: var(--ink-soft); }
details.card[open] > summary::after { content: "▴"; }

.secthead { display: flex; align-items: center; gap: 10px; margin: 4px 2px 10px; }
.secthead h2 { margin-right: auto; }

label.stack, label.grow { display: block; }
label.grow { flex: 1 1 auto; }
.lbl { display: block; font-size: .82rem; color: var(--ink-soft); margin-bottom: 4px; }
input, select, button, textarea { font: inherit; font-size: max(16px, 1rem); }
input[type=text], input[type=number], input[inputmode], select {
  width: 100%;
  min-height: var(--tap-min);
  padding: 8px 10px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
}
input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
.row { display: flex; gap: 10px; align-items: flex-end; }
.fields { display: grid; grid-template-columns: 1fr; gap: 10px; }
@media (min-width: 560px) { .fields { grid-template-columns: 1fr 1fr; } }
.field .unit { color: var(--ink-soft); font-size: .78rem; }
.field .hint { display: block; margin-top: 3px; }
.hint { color: var(--ink-soft); font-size: .78rem; }

.btn {
  min-height: var(--tap-min); padding: 0 14px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--paper); color: var(--ink);
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn.small { min-height: var(--tap-min); padding: 0 12px; font-size: .85rem; }
.btn.ghost { background: transparent; border-color: transparent; }
.btnrow { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

/* results */
.res { border-top: 1px solid var(--line); padding: 12px 0 4px; }
.res:first-child { border-top: 0; }
.res .head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.res .nm { font-weight: 650; }
.res .badge {
  font-size: .7rem; font-weight: 700; letter-spacing: .04em;
  background: var(--accent); color: var(--accent-ink);
  border-radius: 999px; padding: 2px 8px; text-transform: uppercase;
}
.res .big { margin-left: auto; font-size: 1.3rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.res .sub { color: var(--ink-soft); font-size: .84rem; margin-top: 2px; font-variant-numeric: tabular-nums; }
.res .delta { color: var(--warn); font-size: .84rem; margin-top: 2px; font-variant-numeric: tabular-nums; }
.res .flag { color: var(--warn); font-size: .84rem; margin-top: 4px; }
.bar { display: flex; height: 12px; border-radius: 999px; overflow: hidden; margin: 8px 0 6px; background: var(--line); }
.bar > span { display: block; min-width: 1px; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; padding: 0; margin: 0; list-style: none; }
.legend li { font-size: .8rem; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.legend .sw { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; }
.k1 { background: var(--c1); } .k2 { background: var(--c2); } .k3 { background: var(--c3); }
.k4 { background: var(--c4); } .k5 { background: var(--c5); } .k6 { background: var(--c6); }
.k7 { background: var(--c7); } .k8 { background: var(--c8); }
.empty { color: var(--ink-soft); font-size: .9rem; padding: 6px 0; }

/* option cards */
.opt > summary .oname { font-weight: 650; }
.opt > summary .ocost { margin-left: auto; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.opt .grouphead { margin-top: 14px; }

.banner {
  position: fixed; left: 10px; right: 10px;
  bottom: calc(10px + env(safe-area-inset-bottom));
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  background: var(--card); color: var(--ink);
  border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow); padding: 10px 12px; font-size: .9rem;
  max-width: 740px; margin: 0 auto;
}
.foot { color: var(--ink-soft); font-size: .78rem; padding: 6px 4px 0; }
.foot p { margin: .3rem 0; }