:root {
  --bg: #f4f6f5;
  --card: #ffffff;
  --ink: #17211c;
  --muted: #5e6d65;
  --line: #e3e8e5;
  --accent: #1f7a4d;
  --accent-soft: #e8f6ee;
  --warn: #9a3412;
  --warn-soft: #fff4ed;
  --shadow: 0 1px 2px rgba(23, 33, 28, .04), 0 8px 24px rgba(23, 33, 28, .04);
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", Inter, sans-serif; background: var(--bg); color: var(--ink); }
.app { max-width: 980px; margin: 0 auto; padding: 28px 20px 48px; }
.top { display: flex; justify-content: space-between; gap: 16px; align-items: flex-end; margin-bottom: 18px; }
.eyebrow { margin: 0 0 4px; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
h1 { margin: 0; font-size: 28px; letter-spacing: -.4px; }
.lead { margin: 6px 0 0; max-width: 560px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.kpi, .card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.kpi { padding: 14px 16px; }
.kpi span { display: block; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.kpi strong { display: block; margin-top: 4px; font-size: 26px; letter-spacing: -.4px; }
.layout { display: grid; grid-template-columns: 1.3fr .7fr; gap: 16px; }
.card { padding: 18px; margin-bottom: 16px; }
.card h2 { margin: 0 0 14px; font-size: 15px; }
label { display: block; margin-bottom: 5px; color: var(--muted); font-size: 12px; font-weight: 650; }
input, select { width: 100%; border: 1px solid var(--line); background: #fbfcfb; color: var(--ink); border-radius: 10px; padding: 10px 12px; font: inherit; }
input:focus, select:focus { outline: 2px solid #cfe8da; border-color: var(--accent); }
.row { display: grid; gap: 10px; margin-bottom: 10px; }
.g2 { grid-template-columns: 1fr 1fr; }
.g3 { grid-template-columns: 1fr 1fr 1fr; }
.g4 { grid-template-columns: 1.4fr .8fr .8fr .8fr; }
.btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
button { font: inherit; cursor: pointer; border-radius: 10px; border: 1px solid var(--line); background: #fff; color: var(--ink); padding: 10px 12px; }
button.primary { background: var(--accent); color: #fff; border-color: transparent; font-weight: 700; }
button.danger { color: var(--warn); }
.result { margin-top: 14px; padding: 14px; border-radius: 12px; background: var(--accent-soft); }
.result.warn { background: var(--warn-soft); }
.result strong { display: block; font-size: 22px; letter-spacing: -.3px; }
.sub { margin-top: 6px; color: var(--muted); font-size: 13px; line-height: 1.45; }
.bar { height: 8px; background: #d9e7df; border-radius: 99px; overflow: hidden; margin-top: 10px; }
.bar > div { height: 100%; background: var(--accent); }
.mix-row, .preset { display: flex; justify-content: space-between; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); }
.mix-row:last-child, .preset:last-child { border-bottom: 0; }
.message { min-height: 20px; margin: 0 0 12px; font-size: 13px; }
.message.ok { color: var(--accent); }
.message.warn { color: var(--warn); }
.empty { color: var(--muted); font-size: 13px; padding: 8px 0; }
@media (max-width: 800px) {
  .layout, .kpis, .g4, .g3 { grid-template-columns: 1fr 1fr; }
  .layout { grid-template-columns: 1fr; }
}