:root {
  --color-primary: #c7328b;
  --color-primary-dark: #a12570;
  --color-secondary: #2e83c5;
  --color-text: #221e1f;
  --color-muted: #6b7280;
  --color-border: #221e1f;
  --color-bg: #f5f6f8;
  --color-error: #d32f2f;
  --color-success: #1e8a4c;
  --color-caution: #d97706;
  --radius-card: 32px;
  --radius-field: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 32px 16px;
  background: var(--color-bg);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
}

.card {
  width: 100%;
  max-width: 420px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px 28px 28px;
  background: #fff;
}

.logo {
  display: block;
  width: 220px;
  max-width: 70%;
  height: auto;
  margin: 0 auto 20px;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-secondary);
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

h1 {
  text-align: center;
  color: var(--color-primary);
  font-size: 21px;
  margin: 0 0 24px;
}

h2 {
  text-align: center;
  color: var(--color-primary);
  font-size: 19px;
  margin: 0 0 8px;
}

.section-intro {
  text-align: center;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.4;
  margin: 0 0 20px;
}

.field {
  margin-bottom: 16px;
}

.input-row {
  display: flex;
  gap: 10px;
}

.input-row input {
  flex: 1 1 auto;
  min-width: 0;
}

.input-row select {
  flex: 1 1 auto;
  min-width: 0;
}

label {
  display: block;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
}

select,
input {
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-field);
  background: #fff;
  color: var(--color-text);
  font-family: inherit;
}

select:focus,
input:focus {
  outline: 2px solid var(--color-secondary);
  outline-offset: 1px;
}

select:invalid {
  color: var(--color-muted);
}

select:disabled,
input:disabled {
  background: var(--color-bg);
  color: var(--color-muted);
  cursor: not-allowed;
}

.error {
  min-height: 16px;
  margin: 4px 2px 0;
  font-size: 12px;
  color: var(--color-error);
}

.error-general {
  min-height: 0;
  text-align: center;
  margin: 8px 2px 0;
}

.btn-calcular {
  display: block;
  width: 100%;
  margin: 8px 0 24px;
  padding: 14px;
  border: none;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn-calcular:hover {
  background: var(--color-primary-dark);
}

.selector-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.btn-link {
  display: block;
  width: 100%;
  padding: 16px;
  border-radius: 999px;
  text-align: center;
  text-decoration: none;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: filter 0.15s ease;
}

.btn-link:hover {
  filter: brightness(0.92);
}

.btn-link.btn-primary {
  background: var(--color-primary);
}

.btn-link.btn-secondary {
  background: var(--color-secondary);
}

.result-label {
  text-align: center;
  font-weight: 700;
  font-size: 14px;
  margin: 0 0 12px;
}

.result-box {
  border: 2px solid var(--color-border);
  border-radius: 16px;
  padding: 18px;
  text-align: center;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#result-value,
#water-result-value,
#combo-total-value,
#combo-diff-value,
#water-consumo-value,
#water-percent-value,
#water-diff-value,
#imc-value {
  font-size: 30px;
  font-weight: 800;
  color: var(--color-secondary);
}

#combo-diff-value.is-warning {
  color: var(--color-error);
}

#water-percent-value.water-level-exceso,
#water-diff-value.water-level-exceso {
  color: var(--color-text);
}

#water-percent-value.water-level-balance,
#water-diff-value.water-level-balance {
  color: var(--color-success);
}

#water-percent-value.water-level-cercano,
#water-diff-value.water-level-cercano {
  color: var(--color-caution);
}

#water-percent-value.water-level-bajo,
#water-diff-value.water-level-bajo {
  color: var(--color-error);
}

.feedback-message {
  text-align: center;
  font-weight: 700;
  font-size: 13px;
  line-height: 1.4;
  margin: 14px 0 0;
}

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

.feedback-message.is-balance {
  color: var(--color-secondary);
}

.feedback-message.water-level-exceso {
  color: var(--color-text);
}

.feedback-message.water-level-balance {
  color: var(--color-success);
}

.feedback-message.water-level-cercano {
  color: var(--color-caution);
}

.feedback-message.water-level-bajo {
  color: var(--color-error);
}

.footnote {
  text-align: center;
  font-size: 12px;
  font-style: italic;
  color: var(--color-muted);
  margin: 14px 0 0;
}

.disclaimer {
  text-align: center;
  font-size: 12px;
  color: var(--color-muted);
  margin: 10px 0 0;
  line-height: 1.4;
}

.result-section {
  margin-bottom: 20px;
}

.result-section:last-child {
  margin-bottom: 0;
}

.site-footer {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 2px solid var(--color-border);
  border-radius: 16px;
  padding: 16px 20px;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px 20px;
}

.footer-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-secondary);
  font-weight: 700;
  font-size: 13px;
  text-decoration: none;
}

.footer-item:hover {
  text-decoration: underline;
}

.footer-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.footer-nav {
  text-align: center;
}