:root {
  --ink: #1b1f1d;
  --muted: #66736b;
  --paper: #fbfaf5;
  --panel: #ffffff;
  --line: #d8dfd8;
  --accent: #245f46;
  --accent-strong: #174631;
  --danger: #8f2f2f;
  --danger-bg: #fff1ee;
  --shadow: 0 18px 50px rgba(32, 45, 38, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(197, 221, 206, 0.62), transparent 34rem),
    linear-gradient(135deg, #fbfaf5 0%, #eef4ee 100%);
  font-family: Georgia, "Times New Roman", serif;
}

.page-shell {
  width: min(1040px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 72px) clamp(18px, 4vw, 44px);
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
}

.page-shell.compact {
  max-width: 860px;
  grid-template-columns: 1fr;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font: 700 0.82rem/1.2 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 10ch;
  font-size: clamp(2.45rem, 7vw, 5.2rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.lede {
  max-width: 31rem;
  margin: 24px 0 0;
  color: var(--muted);
  font: 1.1rem/1.6 ui-sans-serif, system-ui, sans-serif;
}

.form-panel,
.result-panel {
  width: 100%;
  padding: clamp(20px, 4vw, 34px);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

form {
  display: grid;
  gap: 18px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font: 700 0.9rem/1.3 ui-sans-serif, system-ui, sans-serif;
}

input {
  width: 100%;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fff;
  font: 1rem/1.4 ui-sans-serif, system-ui, sans-serif;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(36, 95, 70, 0.13);
  outline: none;
}

button {
  min-height: 52px;
  border: 0;
  border-radius: 6px;
  padding: 0 18px;
  color: #fff;
  background: var(--accent);
  font: 800 1rem/1 ui-sans-serif, system-ui, sans-serif;
  cursor: pointer;
}

button:hover {
  background: var(--accent-strong);
}

.alert {
  margin-bottom: 18px;
  padding: 14px 16px;
  border: 1px solid rgba(143, 47, 47, 0.22);
  border-radius: 6px;
  color: var(--danger);
  background: var(--danger-bg);
  font: 0.96rem/1.4 ui-sans-serif, system-ui, sans-serif;
}

.alert p {
  margin: 0;
}

.alert p + p {
  margin-top: 6px;
}

dl {
  margin: 0;
  display: grid;
  gap: 12px;
}

dl > div {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

dt {
  color: var(--muted);
  font: 700 0.82rem/1.3 ui-sans-serif, system-ui, sans-serif;
}

dd {
  margin: 7px 0 0;
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  font: 1rem/1.4 ui-sans-serif, system-ui, sans-serif;
}

code {
  overflow-wrap: anywhere;
  font: 700 0.98rem/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

dd button {
  min-height: 38px;
  flex: 0 0 auto;
  padding: 0 12px;
  font-size: 0.86rem;
}

.note {
  margin: 18px 0 0;
  color: var(--muted);
  font: 0.95rem/1.5 ui-sans-serif, system-ui, sans-serif;
}

@media (max-width: 760px) {
  .page-shell {
    grid-template-columns: 1fr;
    align-items: start;
  }

  h1 {
    max-width: 12ch;
    font-size: clamp(2.4rem, 14vw, 4rem);
  }

  .field-grid {
    grid-template-columns: 1fr;
  }

  dd {
    align-items: stretch;
    flex-direction: column;
  }
}