:root {
  --bg-color: #f7f1ea;
  --bg-glow: rgba(214, 164, 91, 0.18);
  --card-color: rgba(255, 252, 247, 0.86);
  --card-border: rgba(135, 102, 56, 0.14);
  --text-primary: #2e241c;
  --text-secondary: #6d5b4b;
  --accent: #c78a36;
  --accent-strong: #a56616;
  --success-bg: rgba(199, 138, 54, 0.12);
  --error: #b14f3f;
  --shadow-soft: 0 24px 80px rgba(65, 45, 24, 0.12);
  --radius-large: 28px;
  --radius-medium: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(circle at top, var(--bg-glow), transparent 28%),
    linear-gradient(180deg, #fcf8f3 0%, var(--bg-color) 100%);
}

body::before {
  width: 220px;
  height: 220px;
  top: 8%;
  left: 8%;
  background: rgba(235, 201, 146, 0.35);
}

body::after {
  width: 180px;
  height: 180px;
  right: 8%;
  bottom: 10%;
  background: rgba(221, 165, 102, 0.28);
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
}

.calculator-card {
  width: min(100%, 920px);
  padding: 32px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-large);
  background: var(--card-color);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
}

.hero {
  margin-bottom: 28px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(199, 138, 54, 0.12);
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0 12px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.02;
}

.hero-copy {
  max-width: 62ch;
  margin: 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.calculator-form {
  display: grid;
  gap: 18px;
}

.input-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.input-group {
  display: grid;
  gap: 10px;
}

.input-group span {
  font-size: 0.95rem;
  font-weight: 700;
}

.input-group input {
  width: 100%;
  border: 1px solid rgba(135, 102, 56, 0.18);
  border-radius: var(--radius-medium);
  padding: 16px 18px;
  font: inherit;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.88);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.input-group input::placeholder {
  color: rgba(109, 91, 75, 0.62);
}

.input-group input:focus {
  outline: none;
  border-color: rgba(199, 138, 54, 0.8);
  box-shadow: 0 0 0 5px rgba(199, 138, 54, 0.14);
  transform: translateY(-1px);
}

.primary-button {
  border: 0;
  border-radius: 999px;
  padding: 16px 22px;
  font: inherit;
  font-weight: 800;
  color: #fffaf4;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  cursor: pointer;
  box-shadow: 0 18px 35px rgba(165, 102, 22, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.primary-button:hover {
  transform: translateY(-2px);
  filter: saturate(1.06);
}

.primary-button:active {
  transform: translateY(0);
}

.form-message {
  min-height: 1.5rem;
  margin: 0;
  color: var(--text-secondary);
  font-weight: 600;
}

.form-message.is-error {
  color: var(--error);
}

.form-message.is-success {
  color: var(--accent-strong);
}

.result-card {
  margin-top: 26px;
  padding: 24px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 250, 242, 0.96), rgba(250, 242, 232, 0.9));
  border: 1px solid rgba(199, 138, 54, 0.16);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.result-card.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.result-header h2 {
  margin: 0;
  font-size: 1.3rem;
}

.result-chip {
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(199, 138, 54, 0.14);
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
}

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

.result-item {
  display: grid;
  gap: 8px;
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(135, 102, 56, 0.12);
}

.result-item strong {
  font-size: 1.45rem;
}

.result-label {
  color: var(--text-secondary);
  font-size: 0.93rem;
  font-weight: 700;
}

.result-item-highlight {
  grid-column: 1 / -1;
  background: var(--success-bg);
  border-color: rgba(199, 138, 54, 0.25);
}

.result-note {
  margin: 18px 0 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (max-width: 780px) {
  .calculator-card {
    padding: 24px;
  }

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

  .result-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 540px) {
  .page-shell {
    padding: 20px 12px;
  }

  .calculator-card {
    padding: 20px;
    border-radius: 24px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .primary-button {
    width: 100%;
  }

  .result-card {
    padding: 20px;
  }

  .result-item strong {
    font-size: 1.3rem;
  }
}