/* ==============================================================
   NutriKidsClub — base.css
   Reset suave, tipografía base, componentes y partials reutilizables.
   Mobile-first. Usa SIEMPRE variables de theme.css (no colores fijos).
   ============================================================== */

/* ---- Fuentes locales (sin Google Fonts) ----
   El owner debe colocar los archivos en /public/assets/fonts/
   con EXACTAMENTE estos nombres (ver assets/fonts/README.md). */
@font-face {
  font-family: "Nunito";
  src: url("../fonts/Nunito-Regular.woff2") format("woff2"),
       url("../fonts/Nunito-Regular.ttf") format("truetype");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Nunito";
  src: url("../fonts/Nunito-Bold.woff2") format("woff2"),
       url("../fonts/Nunito-Bold.ttf") format("truetype");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Feather Bold";
  src: url("../fonts/FeatherBold.woff2") format("woff2"),
       url("../fonts/FeatherBold.ttf") format("truetype");
  font-weight: 700; font-style: normal; font-display: swap;
}

/* ---- Reset suave ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--nk-font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--nk-text);
  background: var(--nk-bg);
  -webkit-font-smoothing: antialiased;
  /* Comportamiento WebView: sin selección molesta del chrome de la app */
  -webkit-tap-highlight-color: transparent;
}

/* ---- Tipografía ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--nk-font-title);
  color: var(--nk-primary);
  line-height: 1.2;
  margin: 0 0 0.5em;
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }
h5 { font-size: 0.95rem; }
h6 { font-size: 0.85rem; }
p  { margin: 0 0 1rem; }
a  { color: var(--nk-primary); text-decoration: none; }
a:hover { color: var(--nk-primary-hover); }
strong { font-weight: 700; }

/* ---- Layout principal ---- */
.nk-main {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--nk-space);
  padding-bottom: calc(var(--nk-space) * 5); /* hueco para bottom-nav */
}
.nk-main--centered {
  display: flex; align-items: center; justify-content: center;
  min-height: 80vh;
}

/* ---- Header ---- */
.nk-header {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px;
  padding: 10px var(--nk-space);
  background: var(--nk-surface);
  border-bottom: 1px solid var(--nk-border);
  box-shadow: var(--nk-shadow);
}
.nk-header__brand { display: flex; align-items: center; gap: 8px; }
.nk-header__logo { font-size: 1.4rem; }
.nk-header__title { font-family: var(--nk-font-title); font-weight: 700; color: var(--nk-primary); }
.nk-header__btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: none; border-radius: var(--nk-radius-sm);
  background: transparent; color: var(--nk-text);
  font-size: 1.2rem; cursor: pointer;
}
.nk-header__btn:hover { background: var(--nk-border); }
.nk-burger, .nk-burger::before, .nk-burger::after {
  display: block; width: 20px; height: 2px; border-radius: 2px;
  background: var(--nk-text); position: relative;
}
.nk-burger::before, .nk-burger::after { content: ""; position: absolute; left: 0; }
.nk-burger::before { top: -6px; }
.nk-burger::after  { top: 6px; }

/* ---- Hero ---- */
.nk-hero { text-align: center; padding: 24px 0 8px; }
.nk-hero__tagline { color: var(--nk-text-secondary); }

/* ---- Cards ---- */
.nk-card {
  background: var(--nk-surface);
  border: 1px solid var(--nk-border);
  border-radius: var(--nk-radius);
  box-shadow: var(--nk-shadow);
  padding: var(--nk-space);
  margin: var(--nk-space) 0;
}
.nk-card--centered { text-align: center; }

/* ---- Botones ---- */
.nk-btn {
  display: inline-block;
  padding: 12px 20px;
  border: none; border-radius: var(--nk-radius-sm);
  background: var(--nk-btn-bg); color: var(--nk-btn-text);
  font-family: var(--nk-font-body); font-weight: 700; font-size: 1rem;
  cursor: pointer; text-align: center;
  transition: filter 0.15s ease;
}
.nk-btn:hover { filter: brightness(1.08); }
.nk-btn--cta { background: var(--nk-cta-bg); color: var(--nk-cta-text); }
.nk-btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }

/* ---- Chips de idioma ---- */
.nk-lang-switch { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.nk-chip {
  padding: 4px 10px; border: 1px solid var(--nk-border);
  border-radius: 999px; font-size: 0.85rem; color: var(--nk-text-secondary);
}
.nk-chip.is-active { background: var(--nk-primary); color: #fff; border-color: var(--nk-primary); }

/* ---- Formularios / búsqueda ---- */
.nk-search { display: flex; gap: 8px; margin: var(--nk-space) 0; }
.nk-search__input {
  flex: 1; padding: 12px 14px;
  border: 1px solid var(--nk-border); border-radius: var(--nk-radius-sm);
  background: var(--nk-surface); color: var(--nk-text); font-size: 1rem;
}
.nk-search__input:focus { outline: 2px solid var(--nk-primary); outline-offset: 1px; }
.nk-search__btn {
  padding: 0 16px; border: none; border-radius: var(--nk-radius-sm);
  background: var(--nk-btn-bg); color: var(--nk-btn-text); cursor: pointer;
}

/* ---- Disclaimer ---- */
.nk-disclaimer {
  display: flex; gap: 8px; align-items: flex-start;
  font-size: 0.85rem; color: var(--nk-text-secondary);
  background: var(--nk-surface); border: 1px dashed var(--nk-border);
  border-radius: var(--nk-radius-sm); padding: 12px; margin: var(--nk-space) 0;
}

/* ---- Footer ---- */
.nk-footer {
  text-align: center; padding: 20px var(--nk-space);
  color: var(--nk-text-muted); font-size: 0.85rem;
  border-top: 1px solid var(--nk-border);
}
.nk-footer__legal { margin-bottom: 4px; }

/* ---- Sidebar / drawer ---- */
.nk-sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 50;
  width: 78%; max-width: 320px;
  background: var(--nk-surface-elevated);
  box-shadow: var(--nk-shadow);
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  padding: 24px 16px;
}
.nk-sidebar.is-open { transform: translateX(0); }
.nk-sidebar__nav { display: flex; flex-direction: column; gap: 4px; }
.nk-sidebar__link {
  padding: 12px; border-radius: var(--nk-radius-sm);
  color: var(--nk-text); font-weight: 700;
}
.nk-sidebar__link:hover { background: var(--nk-border); }
.nk-sidebar__backdrop {
  position: fixed; inset: 0; z-index: 49;
  background: rgba(0, 0, 0, 0.45);
}

/* ---- Menú inferior móvil ---- */
.nk-bottomnav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  display: flex; justify-content: space-around; align-items: center;
  background: var(--nk-surface); border-top: 1px solid var(--nk-border);
  padding: 6px 4px; box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
}
.nk-bottomnav__item {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  font-size: 0.7rem; color: var(--nk-text-secondary); padding: 4px 8px;
}
.nk-bottomnav__icon { font-size: 1.2rem; }
.nk-bottomnav__item--center .nk-bottomnav__icon {
  background: var(--nk-cta-bg); color: var(--nk-cta-text);
  width: 44px; height: 44px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  margin-top: -18px; box-shadow: var(--nk-shadow);
}

/* ---- Overlay de carga (NK-WF-010) ---- */
.nk-overlay {
  position: fixed; inset: 0; z-index: 60;
  display: none; align-items: center; justify-content: center;
  background: rgba(11, 30, 54, 0.55); backdrop-filter: blur(2px);
}
.nk-overlay.is-visible { display: flex; }
.nk-overlay__box {
  background: var(--nk-surface); border-radius: var(--nk-radius);
  padding: 24px 32px; text-align: center; box-shadow: var(--nk-shadow);
}
.nk-overlay__text { margin: 12px 0 0; color: var(--nk-text-secondary); }
.nk-spinner {
  width: 36px; height: 36px; margin: 0 auto;
  border: 4px solid var(--nk-border); border-top-color: var(--nk-primary);
  border-radius: 50%; animation: nk-spin 0.8s linear infinite;
}
@keyframes nk-spin { to { transform: rotate(360deg); } }

/* ---- Modal base ---- */
.nk-modal { position: fixed; inset: 0; z-index: 70; display: none; }
.nk-modal.is-open { display: block; }
.nk-modal__backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.5); }
.nk-modal__box {
  position: relative; max-width: 460px; margin: 12vh auto 0;
  background: var(--nk-surface-elevated); border-radius: var(--nk-radius);
  box-shadow: var(--nk-shadow); padding: 24px;
}
.nk-modal__close {
  position: absolute; top: 8px; right: 12px;
  background: transparent; border: none; font-size: 1.5rem;
  color: var(--nk-text-muted); cursor: pointer;
}

/* ---- Toast (conexión restablecida) ---- */
.nk-toast {
  position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%);
  z-index: 80; background: var(--nk-secondary); color: #0B1E36;
  padding: 10px 18px; border-radius: 999px; font-weight: 700;
  box-shadow: var(--nk-shadow);
}

/* ---- Accesibilidad: respetar reduce-motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition: none !important; }
}