:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel2: #f0f2f5;
  --border: #dde1e7;
  --text: #16181d;
  --muted: #5c6675;
  --accent: #d40d2c;
  --accent2: #0a5cad;
  --good: #0e9f5d;
  --warn: #b57d14;
  --bad: #cf4436;
}:root {
  --bg-grad-a: #f6f7f9;
  --bg-grad-b: #eceff3;
  --shadow: rgba(15, 25, 45, 0.08);
  --price-area: #6b7686;
  --legend-area: #6b7686;
}
[data-theme="dark"] {
  --bg: #0f1216;
  --panel: #171b21;
  --panel2: #1e242c;
  --border: #2a323c;
  --text: #e8ebf0;
  --muted: #9aa4b2;
  --accent: #e31837;
  --accent2: #005daa;
  --good: #3fbf7f;
  --warn: #e0a83a;
  --bad: #e05b5b;
  --bg-grad-a: #0f1216;
  --bg-grad-b: #14181f;
  --shadow: rgba(0, 0, 0, 0.25);
  --price-area: #444b55;
  --legend-area: #444b55;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-feature-settings: "cv05", "ss01";
  background: linear-gradient(160deg, var(--bg-grad-a) 0%, var(--bg-grad-b) 100%);
  color: var(--text);
  min-height: 100vh;
}
[data-theme="dark"] .logo .fuel { color: #6ea8dc; }
h1, h2, h3, .logo, .big, .verdict, .stat .v {
  font-family: "Bricolage Grotesque", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.logo { letter-spacing: -0.01em; }
.theme-toggle {
  position: absolute;
  top: 26px;
  right: 20px;
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font: 600 0.8rem/1 "Inter", sans-serif;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 1px 6px var(--shadow);
}
.theme-toggle:hover { color: var(--text); border-color: var(--muted); }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
html:not([data-theme="dark"]) .theme-toggle .icon-sun { display: none; }
html:not([data-theme="dark"]) .theme-toggle .theme-label::after { content: "Dark mode"; }
[data-theme="dark"] .theme-toggle .theme-label::after { content: "Light mode"; }
.wrap { max-width: 880px; margin: 0 auto; padding: 32px 20px 80px; }
header { text-align: center; margin-bottom: 28px; }
.logo { font-size: 1.5rem; font-weight: 800; letter-spacing: 0.02em; }
.logo .costco { color: var(--accent); }
.logo .fuel { color: var(--accent2); }
.tagline { color: var(--muted); margin-top: 6px; font-size: 0.95rem; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 2px 14px var(--shadow);
}
h2 { margin: 0 0 16px; font-size: 1.05rem; color: var(--text); }
label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 6px; }
select, input[type=number], input[type=text] {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
}
select:focus, input:focus { outline: 2px solid var(--accent2); border-color: transparent; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; }
button.cta {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(180deg, #f43f5e, var(--accent));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 18px;
}
button.cta:hover { filter: brightness(1.08); }
[data-theme="dark"] .cta:hover { filter: brightness(1.15); }
button.cta:disabled { opacity: 0.5; cursor: wait; }
.hint { font-size: 0.78rem; color: var(--muted); margin-top: 4px; }
#result { display: none; }
.verdict { text-align: center; padding: 18px; border-radius: 12px; margin-bottom: 18px; font-weight: 700; font-size: 1.15rem; }
.verdict.worth-it { background: rgba(63,191,127,0.12); color: var(--good); border: 1px solid rgba(63,191,127,0.4); }
.verdict.marginal { background: rgba(224,168,58,0.12); color: var(--warn); border: 1px solid rgba(224,168,58,0.4); }
.verdict.skip-it { background: rgba(224,91,91,0.12); color: var(--bad); border: 1px solid rgba(224,91,91,0.4); }
.big { font-size: 2.2rem; font-weight: 800; text-align: center; }
.big .sub { display: block; font-size: 0.85rem; font-weight: 400; color: var(--muted); margin-top: 4px; }
.statgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-top: 18px; }
.stat { background: var(--panel2); border: 1px solid var(--border); border-radius: 10px; padding: 14px; text-align: center; }
.stat .k { font-size: 0.75rem; color: var(--muted); }
.stat .v { font-size: 1.15rem; font-weight: 700; margin-top: 4px; }
.pos { color: var(--good); }
.neg { color: var(--bad); }
.row { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; align-items: center; }
.pricebar { margin-top: 18px; }
.pbar { display: flex; height: 34px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.pbar .area { background: var(--price-area); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; flex: 1; }
.pbar .costco { background: var(--accent2); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; flex: 1; }
.legend { display: flex; gap: 18px; justify-content: center; margin-top: 8px; font-size: 0.8rem; color: var(--muted); }
.legend span::before { content: "■ "; }
.legend .a::before { color: var(--legend-area); }
.legend .c::before { color: var(--accent2); }
footer { text-align: center; color: var(--muted); font-size: 0.78rem; margin-top: 40px; line-height: 1.6; }
footer a { color: var(--accent2); text-decoration: none; }
.err { color: var(--bad); font-size: 0.9rem; text-align: center; margin-top: 12px; display: none; }
.settings-toggle { background: none; border: none; color: var(--accent2); cursor: pointer; font-size: 0.9rem; padding: 4px; margin-top: 12px; }
.settings-toggle:hover { text-decoration: underline; }
#settings { display: none; margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--border); }
#settings .grid3 { margin-bottom: 14px; }
details.summary-box summary { cursor: pointer; color: var(--accent2); font-size: 0.9rem; }
details.summary-box { margin-top: 16px; }
.summary-box table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 0.88rem; }
.summary-box td { padding: 6px 8px; border-bottom: 1px solid var(--border); }
.summary-box td:last-child { text-align: right; font-weight: 600; }