/* =========================
   RESET GLOBAL
========================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

/* =========================
   VARIABLES · PALETA MÉDICA PREMIUM
========================= */
:root {

  /* Fondo */
  --bg-main: #e6f4fb;
  --bg-gradient: linear-gradient(180deg, #f0f9ff 0%, #e0f2fe 100%);

  /* Cards */
  --card-bg: #ffffff;
  --card-soft: #f0f9ff;

  /* Bordes */
  --border: #c7e3f7;
  --border-strong: #93c5fd;

  /* Texto */
  --text-main: #0f172a;
  --text-muted: #475569;

  /* Primario */
  --primary: #0284c7;
  --primary-strong: #0369a1;

  /* Sombras */
  --shadow-soft: 0 8px 24px rgba(2, 132, 199, 0.08);
  --shadow-hover: 0 14px 34px rgba(2, 132, 199, 0.15);
}

/* =========================
   BODY
========================= */
body {
  background: var(--bg-gradient);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* =========================
   HEADER PRINCIPAL
========================= */
.site-header {
  text-align: center;
  padding: 3.5rem 1.5rem 2rem;
}

.site-header h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--primary-strong);
  letter-spacing: -0.5px;
}

.site-header p {
  margin-top: 0.75rem;
  color: var(--text-muted);
  font-size: 1rem;
}

/* =========================
   CONTENEDOR
========================= */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

/* =========================
   PAGE HEADER
========================= */
.page-header {
  text-align: center;
  margin-bottom: 3rem;
}

.page-header h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--primary);
}

/* =========================
   CARD PREMIUM
========================= */
.card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 2.25rem;
  margin-bottom: 2.75rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* =========================
   GRID
========================= */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

/* =========================
   LABELS
========================= */
label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
}

/* =========================
   INPUTS PREMIUM
========================= */
input {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.85rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background-color: var(--card-soft);
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  background-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.18);
}

/* =========================
   RESULTADOS
========================= */
.result {
  display: flex;
  justify-content: space-between;
  margin-top: 1.2rem;
  padding: 1rem 1.25rem;
  background: var(--card-soft);
  border-radius: 14px;
  font-size: 1.15rem;
  font-weight: 600;
  border: 1px solid var(--border);
}

/* =========================
   TABLA PROFESIONAL
========================= */
.tabla-enterales {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  background-color: #ffffff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.tabla-enterales th,
.tabla-enterales td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.tabla-enterales th {
  background: linear-gradient(180deg, var(--primary), var(--primary-strong));
  color: white;
  font-weight: 600;
}

.tabla-enterales tr:last-child td {
  border-bottom: none;
}

/* =========================
   NOTE CLÍNICA
========================= */
.note {
  margin-top: 1.75rem;
  padding: 1.25rem;
  border-radius: 16px;
  background: rgba(2, 132, 199, 0.08);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* =========================
   DIVIDER
========================= */
.divider {
  height: 1px;
  background: var(--border);
  margin: 3.5rem 0;
}

/* =========================
   FOOTER PREMIUM
========================= */
.site-footer {
  text-align: center;
  padding: 3rem 1.5rem;
  margin-top: 5rem;
  background: #dbeafe;
  border-top: 1px solid var(--border-strong);
}

.site-footer .footer-nav {
  margin-bottom: 1rem;
}

.site-footer a {
  color: var(--primary-strong);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.site-footer a:hover {
  color: var(--primary);
}

.site-footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 640px) {

  .site-header h1 {
    font-size: 1.8rem;
  }

  .card {
    padding: 1.75rem;
  }

  .result {
    flex-direction: column;
    gap: 0.5rem;
  }
}