:root {
  --bg: #0b0e14;
  --bg2: #10141d;
  --card: #151b26;
  --line: #232c3b;
  --text: #dbe4f0;
  --dim: #8b98ac;
  --accent: #ffb347;
  --accent2: #ff7847;
  --good: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(255, 179, 71, 0.07), transparent 60%),
    radial-gradient(900px 420px at -10% 10%, rgba(255, 120, 71, 0.05), transparent 55%),
    var(--bg);
  color: var(--text);
}
header {
  display: flex; align-items: center; gap: 16px;
  padding: 20px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 14, 20, 0.85);
  position: sticky; top: 0; z-index: 5; backdrop-filter: blur(8px);
}
header .logo { width: 52px; height: 52px; }
header h1 {
  margin: 0; font-size: 22px; letter-spacing: 0.2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tagline { margin: 2px 0 0; color: var(--dim); font-size: 13px; }
header nav { margin-left: auto; display: flex; gap: 18px; }
header nav a { color: var(--dim); text-decoration: none; font-size: 14px; }
header nav a:hover { color: var(--accent); }

main { max-width: 1180px; margin: 0 auto; padding: 24px clamp(12px, 3vw, 32px) 64px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.controls { margin-bottom: 18px; }
.row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.row:last-child { margin-bottom: 0; }
label { font-size: 14px; color: var(--dim); min-width: 90px; }
.hint { color: var(--dim); font-size: 12px; font-weight: 400; }
output { font-family: var(--mono); color: var(--accent); min-width: 44px; }

input[type="range"] {
  flex: 1; min-width: 200px; accent-color: var(--accent); height: 6px;
}
input[type="text"], select, textarea {
  background: var(--bg2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px; font-size: 14px;
}
input[type="text"] { flex: 1; min-width: 220px; }
select:focus, input:focus, textarea:focus { outline: 1px solid var(--accent); }

button {
  border: none; border-radius: 8px; padding: 10px 18px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: transform 0.06s ease, filter 0.15s ease;
}
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #161003;
}
.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }

.io { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
@media (max-width: 900px) { .io { grid-template-columns: 1fr; } }
.pane h2 { margin: 0 0 10px; font-size: 15px; color: var(--dim); font-weight: 600; }
.pane textarea {
  width: 100%; height: 300px; resize: vertical;
  font-family: var(--mono); font-size: 13px; line-height: 1.5;
}
.pane .ghost { margin-top: 10px; }

#results { margin-bottom: 18px; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
@media (max-width: 700px) { .metrics { grid-template-columns: repeat(2, 1fr); } }
.metric { text-align: center; padding: 14px 8px; }
.metric span { display: block; font-size: 26px; font-weight: 700; color: var(--accent); font-family: var(--mono); }
.metric label { color: var(--dim); font-size: 12px; }

.verify, .savings { margin-bottom: 18px; }
.verify h2, .savings h2 { margin: 0 0 12px; font-size: 15px; }
.score { float: right; font-family: var(--mono); font-size: 20px; }
.meter { height: 10px; background: var(--bg2); border-radius: 6px; overflow: hidden; margin-bottom: 10px; }
.meter div { height: 100%; width: 0; border-radius: 6px; transition: width 0.5s ease, background 0.3s; }

.missing h3 { margin: 14px 0 8px; font-size: 13px; color: var(--bad); }
.missing ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.missing li {
  font-family: var(--mono); font-size: 12px;
  background: rgba(248, 113, 113, 0.1); border: 1px solid rgba(248, 113, 113, 0.35);
  color: var(--bad); border-radius: 6px; padding: 3px 8px;
}
.missing li.med { border-color: rgba(251, 191, 36, 0.4); color: var(--warn); background: rgba(251, 191, 36, 0.08); }
.missing li.low { border-color: var(--line); color: var(--dim); background: var(--bg2); }
.missing li em { opacity: 0.65; font-style: normal; font-size: 10px; margin-left: 4px; }

.savings .srow {
  display: grid; grid-template-columns: 1fr auto auto; gap: 10px;
  padding: 8px 4px; border-bottom: 1px dashed var(--line); font-size: 14px;
}
.savings .srow:last-child { border-bottom: none; }
.savings .srow .amt { font-family: var(--mono); color: var(--good); text-align: right; }
.savings .srow .was { font-family: var(--mono); color: var(--dim); text-align: right; }

.how img { width: 100%; border-radius: 8px; margin: 10px 0; background: var(--bg2); }
.how .cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 700px) { .how .cols { grid-template-columns: 1fr; } }
.how h3 { color: var(--accent); margin: 4px 0 6px; font-size: 15px; }
.how p { margin: 0; color: var(--dim); font-size: 14px; }

footer { text-align: center; color: var(--dim); }
#stats { font-family: var(--mono); font-size: 13px; margin-bottom: 8px; color: var(--text); }
footer a { color: var(--accent); }

.hidden { display: none !important; }