/* =============================================
   MIS RECETAS - Estilos globales
   Sistema de diseño: Culinary Editorial
   ============================================= */

:root {
  --primary:              #944a00;
  --primary-container:    #e67e22;
  --on-primary:           #ffffff;
  --background:           #faf9f5;
  --surface:              #faf9f5;
  --surface-container:    #efeeea;
  --surface-container-low:#f4f4f0;
  --surface-white:        #ffffff;
  --on-surface:           #1b1c1a;
  --on-surface-variant:   #564337;
  --outline:              #897365;
  --outline-variant:      #dcc1b1;
  --secondary:            #466552;
  --secondary-container:  #c7ebd2;
  --error:                #ba1a1a;
  --error-container:      #ffdad6;
  --font-display:         'Newsreader', serif;
  --font-body:            'Hanken Grotesk', sans-serif;
  --space-xs:             4px;
  --space-sm:             12px;
  --space-md:             16px;
  --space-lg:             24px;
  --space-xl:             32px;
  --margin:               20px;
  --radius-sm:            4px;
  --radius-md:            8px;
  --radius-lg:            16px;
  --radius-xl:            24px;
  --radius-full:          9999px;
  --shadow-sm:            0 2px 8px rgba(230, 126, 34, 0.05);
  --shadow-md:            0 4px 16px rgba(230, 126, 34, 0.08);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--background);
  color: var(--on-surface);
  font-size: 16px;
  line-height: 24px;
  -webkit-font-smoothing: antialiased;
}

/* =============================================
   PANTALLAS
   ============================================= */
.screen {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--background);
  overflow-y: auto;
}

.screen.active {
  display: flex;
  flex-direction: column;
}

/* =============================================
   LOGIN
   ============================================= */
.login-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: var(--margin);
  background: var(--background);
}

.login-hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 0 40px;
}

.login-title {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: -0.02em;
  text-align: center;
  line-height: 1.1;
}

.login-subtitle {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--on-surface-variant);
  margin-top: 12px;
  text-align: center;
  font-style: italic;
}

.login-form-container {
  padding-bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.login-divider {
  text-align: center;
  color: var(--outline);
  font-size: 13px;
  padding: 4px 0;
}

.btn-google {
  background: var(--surface-white);
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
  font-size: 15px;
  gap: 10px;
}

.btn-google::before {
  content: 'G';
  font-weight: 700;
  font-size: 18px;
  color: #4285F4;
}

.btn-apple {
  background: #000000;
  color: #ffffff;
  font-size: 15px;
  gap: 10px;
}

/* =============================================
   FORMULARIOS
   ============================================= */
.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--on-surface-variant);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.form-group input {
  width: 100%;
  padding: 14px var(--space-md);
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--on-surface);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--primary-container);
  caret-color: var(--primary-container);
}

.form-group input::placeholder {
  color: var(--outline);
}

/* =============================================
   BOTONES
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px var(--space-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary-container);
  color: var(--on-primary);
  box-shadow: 0 4px 12px rgba(230, 126, 34, 0.3);
}

.btn-primary:hover {
  background: var(--primary);
  box-shadow: 0 8px 16px rgba(230, 126, 34, 0.4);
}

.btn-secondary {
  background: var(--surface-white);
  color: var(--primary);
  border: 1px solid var(--outline-variant);
}

.btn-secondary:hover {
  background: var(--surface-container);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--on-surface);
}

/* =============================================
   ALERTAS
   ============================================= */
.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  font-size: 14px;
}

.alert-error {
  background: var(--error-container);
  color: var(--error);
}

.hidden {
  display: none !important;
}

/* =============================================
   HEADER
   ============================================= */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--margin);
  background: var(--background);
  border-bottom: 1px solid var(--outline-variant);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--primary);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
}

/* =============================================
   MAIN
   ============================================= */
.app-main {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg) var(--margin);
  padding-bottom: 80px;
}

.loading {
  text-align: center;
  color: var(--on-surface-variant);
  padding: var(--space-xl);
}

/* =============================================
   NAV INFERIOR
   ============================================= */
.app-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-white);
  border-top: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-around;
  padding: 8px 0;
  padding-bottom: max(8px, env(safe-area-inset-bottom));
  z-index: 100;
  height: 64px;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 12px;
  color: var(--outline);
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  transition: color 0.2s;
  height: 100%;
}

.nav-item.active {
  color: var(--primary-container);
}

.nav-item svg {
  transition: stroke 0.2s;
}

.nav-add {
  width: 52px;
  height: 52px;
  background: var(--primary-container);
  color: var(--on-primary);
  border-radius: var(--radius-full);
  padding: 0;
  box-shadow: 0 4px 12px rgba(230, 126, 34, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =============================================
   BUSCADOR
   ============================================= */
.search-container {
  margin-bottom: var(--space-md);
}

.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-full);
  padding: 10px var(--space-md);
}

.search-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.search-box input {
  border: none;
  background: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--on-surface);
  width: 100%;
}

.search-box input::placeholder {
  color: var(--outline);
}

/* =============================================
   CATEGORÍAS
   ============================================= */
.categorias-scroll {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-lg);
  scrollbar-width: none;
}

.categorias-scroll::-webkit-scrollbar {
  display: none;
}

.categoria-chip {
  flex-shrink: 0;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--outline-variant);
  background: var(--surface-white);
  color: var(--on-surface-variant);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.categoria-chip.active {
  background: var(--primary-container);
  color: var(--on-primary);
  border-color: var(--primary-container);
}

/* =============================================
   HOME VACÍO
   ============================================= */
.home-empty {
  text-align: center;
  padding: 60px var(--space-lg);
  color: var(--on-surface-variant);
}

.empty-icon {
  font-size: 56px;
  margin-bottom: var(--space-md);
}

.empty-titulo {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  color: var(--on-surface);
  margin-bottom: var(--space-sm);
}

.empty-texto {
  font-size: 15px;
  line-height: 24px;
  max-width: 280px;
  margin: 0 auto;
}

/* =============================================
   TARJETAS DE RECETA
   ============================================= */
.recetas-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.recetas-grid-2 {
  grid-template-columns: 1fr 1fr;
}

.receta-card {
  background: var(--surface-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: box-shadow 0.2s;
}

.receta-card:hover {
  box-shadow: var(--shadow-md);
}

.receta-card-imagen {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

.receta-card-body {
  padding: var(--space-md);
}

.receta-card-titulo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--on-surface);
  margin-bottom: var(--space-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.receta-card-meta {
  display: flex;
  gap: var(--space-sm);
  font-size: 12px;
  color: var(--on-surface-variant);
  margin-top: var(--space-xs);
}

.receta-card-favorita {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.receta-card-wrapper {
  position: relative;
}

/* =============================================
   SECCIÓN TÍTULOS
   ============================================= */
.seccion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.seccion-titulo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--on-surface);
}

.seccion-ver-todas {
  font-size: 13px;
  color: var(--primary-container);
  font-weight: 600;
  background: none;
  border: none;
  cursor: pointer;
}

/* =============================================
   CHIPS / ETIQUETAS
   ============================================= */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--secondary-container);
  color: var(--secondary);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

/* =============================================
   RESPONSIVE - ESCRITORIO
   ============================================= */
@media (min-width: 768px) {
  .screen {
    align-items: center;
    justify-content: center;
    background: var(--surface-container);
  }

  .login-container {
    width: 420px;
    min-height: auto;
    background: var(--background);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-xl);
  }

  .login-hero {
    padding: var(--space-xl) 0 var(--space-lg);
  }

  .app-header {
    width: 420px;
  }

  .app-main {
    width: 420px;
  }

  .app-nav {
    width: 420px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border: 1px solid var(--outline-variant);
    border-bottom: none;
  }
}