:root {
  --bg: #f8f6f0;
  --card: #fffdf7;
  --ink: #142030;
  --accent: #145f7a;
  --line: #d7d0c2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 0%, #fff9e6 0%, var(--bg) 45%, #efe8d8 100%);
}

.shell {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
}

h1,
h2 {
  margin: 0 0 0.5rem;
}

p {
  margin: 0.25rem 0;
}

form,
.grid2,
.grid3 {
  display: grid;
  gap: 0.75rem;
}

.grid2 {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.grid3 {
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.95rem;
}

input,
select,
button {
  font: inherit;
  padding: 0.55rem 0.65rem;
  border: 1px solid #bbb7ab;
  border-radius: 8px;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
}

.checkline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.checkline input {
  width: auto;
}

#results {
  display: grid;
  gap: 0.75rem;
}

.result {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem;
  background: #fff;
}

.offer {
  border: 1px solid #e6dfd2;
  border-radius: 8px;
  padding: 0.6rem;
  margin-top: 0.5rem;
}

.offer-primary {
  border-color: #94b8c6;
  background: #f6fbfd;
}

details {
  margin-top: 0.55rem;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

.meta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.muted {
  color: #5e6772;
}

@media (max-width: 600px) {
  .shell {
    padding: 0.75rem;
  }
}