:root {
  --bg: #f4ece0;
  --panel: rgba(255, 252, 247, 0.95);
  --panel-strong: #fffaf1;
  --text: #1d1f1b;
  --muted: #5f645a;
  --line: rgba(73, 51, 34, 0.14);
  --accent: #8a4b2f;
  --accent-strong: #6f3420;
  --accent-soft: rgba(138, 75, 47, 0.12);
  --shadow: 0 10px 30px rgba(50, 31, 18, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --font-heading: "Merriweather", serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--bg);
  background:
    radial-gradient(circle at top left, rgba(138, 75, 47, 0.08), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(121, 147, 91, 0.08), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
}
h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.1; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }

.shell { max-width: 1180px; margin: 0 auto; padding: 24px; }
header { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 18px 0 26px; flex-wrap: wrap; }
.brand { font-size: 1.2rem; font-weight: 700; letter-spacing: .03em; }
.meta { font-family: Arial, Helvetica, sans-serif; font-size: .92rem; color: var(--muted); }
nav { display: flex; gap: 8px; flex-wrap: wrap; }
nav a { padding: 10px 14px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.58); font-family: Arial, Helvetica, sans-serif; font-size: .95rem; }
nav a.active { background: var(--panel); border-color: var(--accent); }

.hero, .panel { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: 24px; box-shadow: var(--shadow); }
.hero { padding: 34px; display: grid; grid-template-columns: 1.2fr .9fr; gap: 28px; }
.panel { padding: 24px; }
.eyebrow { font-family: Arial, Helvetica, sans-serif; color: var(--accent); font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 14px; }
h1, h2, h3 { margin: 0 0 14px; line-height: 1.05; }
h1 { font-size: clamp(2.5rem, 6vw, 4.2rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { font-size: 1.1rem; }
p, li, label, input, textarea, select, button { font-family: Arial, Helvetica, sans-serif; }
p { color: var(--muted); line-height: 1.6; }
.grid { display: grid; gap: 20px; margin-top: 22px; }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.btn, button { border: 0; background: var(--accent); color: #fff; padding: 14px 18px; border-radius: 14px; font-weight: 700; cursor: pointer; }
.btn.secondary { background: var(--panel); color: var(--ink, var(--text)); border: 1px solid var(--line); }
textarea, input, select { width: 100%; padding: 14px 16px; border-radius: 14px; border: 1px solid #cbbfb0; background: #fffefb; color: var(--text); font-size: 1rem; }
textarea { min-height: 190px; resize: vertical; }
label { display: block; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.stack { display: grid; gap: 16px; }
.notice { padding: 14px 16px; border-radius: 14px; margin-bottom: 14px; font-family: Arial, Helvetica, sans-serif; }
.notice.error { background: #fce9e4; color: #9c3d2b; }
.notice.success { background: #e4f4ea; color: #215f41; }
.muted-box { background: var(--accent-soft); border-radius: 18px; padding: 22px; }
.stat { border-top: 1px solid var(--line); padding-top: 12px; margin-top: 12px; }
.small { font-size: .92rem; }
.result pre { white-space: pre-wrap; font-family: Arial, Helvetica, sans-serif; margin: 0; }
footer { padding: 30px 0 10px; color: var(--muted); font-family: Arial, Helvetica, sans-serif; font-size: .92rem; }
.hero-grid { display: contents; }

@media (max-width: 860px) {
  .hero, .cols-3, .cols-2 { grid-template-columns: 1fr; }
  .shell { padding: 16px; }
  .hero, .panel { border-radius: 18px; }
}