:root {
  --bg: #f4efe7;
  --bg-accent: #e7dac8;
  --panel: rgba(255, 252, 246, 0.82);
  --panel-strong: #fffaf2;
  --text: #25190f;
  --muted: #6c5a4c;
  --line: rgba(91, 67, 43, 0.18);
  --brand: #9c4f22;
  --brand-dark: #6d3513;
  --success: #154f36;
  --shadow: 0 20px 60px rgba(67, 42, 18, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(156, 79, 34, 0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(21, 79, 54, 0.12), transparent 24%),
    linear-gradient(145deg, var(--bg), #fbf7f1 45%, var(--bg-accent));
}

.app-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 56px;
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand);
}

h1,
h2,
.result-value {
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
}

h1 {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 0.95;
}

.hero-copy,
.muted,
.status-message,
.field span,
.result-grid span {
  color: var(--muted);
}

.hero-copy {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: 1.05rem;
  line-height: 1.6;
}

.calculator-card,
.info-card {
  background: var(--panel);
  backdrop-filter: blur(18px);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.calculator-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  padding: 24px;
}

.calculator-form,
.result-card,
.info-card {
  padding: 24px;
}

.calculator-form {
  display: grid;
  gap: 18px;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 22px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.94rem;
}

.field input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(91, 67, 43, 0.2);
  border-radius: 16px;
  font: inherit;
  color: var(--text);
  background: var(--panel-strong);
}

.field input:focus {
  outline: 2px solid rgba(156, 79, 34, 0.22);
  border-color: var(--brand);
}

.actions {
  display: flex;
  gap: 12px;
  padding-top: 8px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 14px 20px;
  font: inherit;
  cursor: pointer;
  transition: transform 180ms ease, opacity 180ms ease, background-color 180ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button[type="submit"] {
  background: var(--brand);
  color: #fff8ef;
}

.secondary {
  background: rgba(109, 53, 19, 0.1);
  color: var(--brand-dark);
}

.result-card {
  display: grid;
  align-content: start;
  gap: 16px;
  background: linear-gradient(180deg, rgba(255, 250, 242, 0.9), rgba(240, 233, 221, 0.95));
  border-radius: 22px;
}

.result-label {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
}

.result-value {
  margin: 0;
  font-size: clamp(3rem, 6vw, 4.8rem);
  line-height: 0.92;
}

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

.result-grid article {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(91, 67, 43, 0.12);
}

.result-grid span,
.result-grid strong {
  display: block;
}

.result-grid strong {
  margin-top: 8px;
  font-size: 1.02rem;
}

.status-message {
  margin: 0;
  line-height: 1.5;
}

.status-message.success {
  color: var(--success);
}

.status-message.error {
  color: #8f2b15;
}

.info-card {
  margin-top: 24px;
}

.info-card h2 {
  margin-top: 0;
}

code {
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.96rem;
}

@media (max-width: 860px) {
  .calculator-card {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100% - 20px, 1080px);
    padding-top: 28px;
  }

  .calculator-card,
  .calculator-form,
  .result-card,
  .info-card {
    padding: 18px;
  }

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