:root {
  --bg: #f6f8fa;
  --card: #ffffff;
  --text: #222;
  --muted: #56697a;
  --blue: #0073e6;
  --blue-dark: #005bb5;
  --danger: #d93025;
  --radius: 12px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #e6f0ff 0%, #f7f8fb 100%);
}

.app-container {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.2rem;
}

.calculator-card {
  width: min(760px, 100%);
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin: 1rem;
}

.header h1 {
  margin: 0;
  font-size: 1.95rem;
}

.header p {
  margin: 0.25rem 0 1rem;
  color: var(--muted);
}

.form-grid {
  display: grid;
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.4rem;
  font-size: 0.93rem;
}
.field span {
  font-weight: 600;
}

.field input,
.field select {
  width: 100%;
  border: 1px solid #d8dee4;
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font-size: 0.96rem;
}

.field-group {
  border: 1px solid #dce3ec;
  border-radius: 8px;
  padding: 0.75rem 0.8rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  font-size: 0.96rem;
}

.field-group label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
}

.btn-calculate {
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: white;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.9rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-calculate:hover,
.btn-calculate:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0, 115, 230, 0.35);
}

.error-message {
  color: var(--danger);
  min-height: 1.3rem;
  font-size: 0.9rem;
}

.result {
  margin-top: 1rem;
  padding: 1rem;
  background: #f6f9ff;
  border-radius: 10px;
  border: 1px solid #d9e5ff;
}

.hidden {
  display: none;
}

.results-list,
.macros ul {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.results-list li,
.macros li {
  margin: 0.35rem 0;
  font-size: 0.95rem;
}

.macros h3 {
  margin: 1rem 0 0.4rem;
  font-size: 1rem;
}