/* ─── Design tokens ────────────────────────────────────────────────────────── */
:root {
  /* Tipografía */
  --font-principal: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-weight-light: 300;   /* cuerpo, nav, labels */
  --font-weight-medium: 500;  /* headings, botones, énfasis */

  --text-h1: 72px;
  --text-h2: 52px;
  --text-h3: 32px;
  --text-h4: 20px;
  --text-body: 16px;
  --text-small: 12px;
  --text-nav: 14px;

  /* Colores — Brand */
  --color-brand-blue: #000BFF;
  --color-ink: #0d0d0d;
  --color-white: #ffffff;
  --color-offwhite: #fdfcfb;

  /* Fondos de sección */
  --bg-white: #ffffff;
  --bg-warm-gray: #f9f8f6;
  --bg-soft-blue: #eef0ff;
  --bg-stone: #e7e7e2;
  --bg-dark: #1a1a1a;

  /* Texto */
  --text-primary: #0d0d0d;
  --text-subheading: #262320;
  --text-secondary: rgba(13, 13, 13, 0.55);
  --text-muted: rgba(13, 13, 13, 0.35);
}

/* ─── Reset & base ─────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--text-body);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-principal);
  font-weight: var(--font-weight-light);
  color: var(--text-primary);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ─── Contenedor centrado ──────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 860px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* ─── Header ───────────────────────────────────────────────────────────────── */
.site-header {
  background-color: var(--color-offwhite);
  border-bottom: 1px solid var(--bg-stone);
  padding-block: 1rem;
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.header-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--text-primary);
}

.header-logo {
  height: 36px;
  width: auto;
  display: block;
}

.header-tagline {
  font-size: var(--text-nav);
  font-weight: var(--font-weight-light);
  color: var(--text-secondary);
}

/* ─── Main (flex: 1 para que absorba el espacio sobrante antes del footer) ─── */
main {
  flex: 1;
}

/* ─── Sección búsqueda ─────────────────────────────────────────────────────── */
.seccion-busqueda {
  background-color: var(--bg-white);
  padding-block: 3.5rem 2.5rem;
}

.busqueda-titulo {
  font-size: clamp(2rem, 8vw, var(--text-h1));
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.busqueda-subtitulo {
  font-size: var(--text-body);
  font-weight: var(--font-weight-light);
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.55;
  margin-bottom: 2rem;
}

/* ─── Formulario ───────────────────────────────────────────────────────────── */
.form-busqueda {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: var(--text-nav);
  font-weight: var(--font-weight-medium);
  color: var(--text-subheading);
}

.form-fila {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

.form-input {
  flex: 1;
  min-height: 44px;
  padding: 0 1rem;
  font-family: var(--font-principal);
  font-size: var(--text-body);
  font-weight: var(--font-weight-light);
  color: var(--text-primary);
  background-color: var(--bg-white);
  border: 1.5px solid var(--bg-stone);
  border-radius: 9999px;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  border-color: var(--color-brand-blue);
}

.form-hint {
  font-size: var(--text-small);
  font-weight: var(--font-weight-light);
  color: var(--text-muted);
  padding-inline: 0.25rem;
}

/* ─── Botón primario ───────────────────────────────────────────────────────── */
.btn-primario {
  background: var(--color-brand-blue);
  color: var(--color-white);
  padding: 12px 20px;
  border-radius: 9999px; /* pill */
  border: none;
  font-family: var(--font-principal);
  font-size: var(--text-nav);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease;
  white-space: nowrap;
  min-height: 44px;
}

.btn-primario:hover {
  opacity: 0.75;
  transform: scale(1.03);
}

.btn-primario:active {
  transform: scale(0.98);
}

/* ─── Sección resultados ───────────────────────────────────────────────────── */
.seccion-resultados {
  background-color: var(--bg-warm-gray);
  flex: 1;
  padding-block: 2rem 3rem;
  min-height: 80px;
}

.seccion-resultados:empty,
.seccion-resultados:has(#resultados:empty) {
  padding-block: 0;
  min-height: 0;
}

/* ─── Grid de cards ────────────────────────────────────────────────────────── */
.resultados-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

/* ─── Card de receta ───────────────────────────────────────────────────────── */
.receta-card {
  background-color: var(--bg-soft-blue);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.receta-card h3 {
  font-size: var(--text-h3);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  line-height: 1.15;
}

.receta-card .match {
  font-size: var(--text-nav);
  font-weight: var(--font-weight-medium);
  color: var(--color-brand-blue);
}

.receta-card .faltantes {
  font-size: var(--text-body);
  font-weight: var(--font-weight-light);
  color: var(--text-subheading);
  line-height: 1.5;
}

.receta-card .tiempo {
  font-size: var(--text-small);
  font-weight: var(--font-weight-light);
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* ─── Mensaje vacío / error ────────────────────────────────────────────────── */
.mensaje {
  font-size: var(--text-body);
  font-weight: var(--font-weight-light);
  color: var(--text-secondary);
  padding-block: 1rem;
}

/* ─── Footer ───────────────────────────────────────────────────────────────── */
.site-footer {
  background-color: var(--bg-dark);
  padding-block: 1.25rem;
}

.footer-inner {
  display: flex;
  justify-content: center;
}

.footer-texto {
  font-size: var(--text-small);
  font-weight: var(--font-weight-light);
  color: var(--color-white);
  opacity: 0.6;
}

/* ─── Responsive — móvil pequeño (< 480px) ────────────────────────────────── */
@media (max-width: 479px) {
  .form-fila {
    flex-direction: column;
    gap: 0.5rem;
  }

  .form-input,
  .btn-primario {
    width: 100%;
  }
}

/* ─── Responsive — tablet (≥ 640px) ───────────────────────────────────────── */
@media (min-width: 640px) {
  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .resultados-grid {
    grid-template-columns: repeat(2, 1fr);
  }

.receta-card h3 {
    font-size: clamp(1.25rem, 3vw, var(--text-h3));
  }
}

/* ─── Responsive — desktop (≥ 1200px) ─────────────────────────────────────── */
@media (min-width: 1200px) {
  .seccion-busqueda {
    padding-block: 5rem 3.5rem;
  }
}

/* ─── Card hover & CTA ─────────────────────────────────────────────────────── */
.receta-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 11, 255, 0.1);
}

.receta-card:focus-visible {
  outline: 2px solid var(--color-brand-blue);
  outline-offset: 3px;
}

.card-cta {
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-brand-blue);
  margin-top: 0.5rem;
}

/* ─── Modal ────────────────────────────────────────────────────────────────── */
#modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

#modal[hidden] {
  display: none;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(26, 26, 26, 0.72); /* --bg-dark con opacidad */
}

.modal-contenido {
  position: relative;
  z-index: 1;
  background-color: var(--bg-white);
  border-radius: 20px;
  padding: 2rem;
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  /* scroll suave en iOS */
  -webkit-overflow-scrolling: touch;
}

.modal-cerrar {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--bg-stone);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: var(--text-body);
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
  transition: opacity 0.2s ease;
  flex-shrink: 0;
}

.modal-cerrar:hover {
  opacity: 0.6;
}

.modal-nombre {
  font-size: clamp(1.5rem, 5vw, var(--text-h2));
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  line-height: 1.15;
  padding-right: 2.5rem; /* espacio para el botón X */
}

.modal-meta {
  font-size: var(--text-nav);
  font-weight: var(--font-weight-light);
  color: var(--text-secondary);
}

.modal-seccion-titulo {
  font-size: var(--text-h4);
  font-weight: var(--font-weight-medium);
  color: var(--text-subheading);
  border-bottom: 1px solid var(--bg-stone);
  padding-bottom: 0.5rem;
}

/* ─── Lista de ingredientes del modal ──────────────────────────────────────── */
.modal-ingredientes {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ing-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: var(--text-body);
  font-weight: var(--font-weight-light);
}

.ing-icono {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
}

.ing-tiene .ing-icono {
  background-color: var(--bg-soft-blue);
  color: var(--color-brand-blue);
}

.ing-falta .ing-icono {
  background-color: var(--bg-stone);
  color: var(--text-secondary);
}

.ing-tiene {
  color: var(--text-primary);
}

.ing-falta {
  color: var(--text-secondary);
}

/* ─── Lista de pasos del modal ─────────────────────────────────────────────── */
.modal-pasos {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.paso-item {
  display: flex;
  gap: 0.875rem;
  font-size: var(--text-body);
  font-weight: var(--font-weight-light);
  color: var(--text-primary);
  line-height: 1.55;
  align-items: flex-start;
}

.paso-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background-color: var(--color-brand-blue);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  margin-top: 0.15rem;
}