/* ═══════════════════════════════════════════════════════════════
   HERRAMIENTAS INDEX · style.css
   Sphaera Coaching · Menú principal de herramientas
   Mobile-first · Breakpoints: 480 · 768 · 900 · 1100
   ═══════════════════════════════════════════════════════════════ */

/* ─── RESET & BASE ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

:root {
  --terra:      #a0764e;
  --terra-d:    #8b6b4a;
  --terra-l:    #f0e6d8;
  --sand:       #f5f0e8;
  --linen:      #ede7d9;
  --cream:      #fdfaf5;
  --charcoal:   #2c2925;
  --warm-mid:   #6b5c48;
  --mist:       #ddd6c8;
  --sage:       #7a8c7e;
  --white:      #ffffff;
  --radius:     14px;
  --shadow:     0 2px 16px rgba(44,41,37,.07);
  --tr:         .2s ease;
}

body {
  font-family: 'Jost', sans-serif;
  background: var(--sand);
  color: var(--charcoal);
  font-weight: 300;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── NAV ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253,250,245,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--mist);
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: 'Cormorant Garamond', serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--charcoal);
}
.nav__logo span { color: var(--terra); font-style: italic; }
.nav__back {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--warm-mid);
  text-decoration: none;
  transition: color var(--tr);
}
.nav__back:hover { color: var(--terra); }

/* ─── HEADER ─── */
.header {
  padding: 48px 20px 36px;
  text-align: center;
  background: linear-gradient(to bottom, var(--terra-l), var(--sand));
  border-bottom: 1px solid var(--mist);
}
.header__eyebrow {
  display: block;
  font-size: 9.5px;
  font-weight: 400;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: 12px;
  opacity: .8;
}
.header__title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(30px, 7vw, 46px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--charcoal);
  margin-bottom: 12px;
}
.header__title em { color: var(--terra); font-style: italic; }
.header__sub {
  font-size: 14px;
  font-weight: 300;
  color: var(--warm-mid);
  line-height: 1.75;
  max-width: 480px;
  margin: 0 auto;
}

/* ─── FILTROS + BUSCADOR ─── */
.filtros-wrap {
  position: sticky;
  top: 60px;
  z-index: 80;
  background: rgba(245,240,232,0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--mist);
  padding: 0;
}

/* Buscador */
.buscador-wrap {
  position: relative;
  display: flex;
  align-items: center;
  padding: 14px 20px 0;
}
.buscador-wrap__icono {
  position: absolute;
  left: 34px;
  color: var(--terra);
  opacity: .55;
  display: flex;
  align-items: center;
  pointer-events: none;
  transition: opacity var(--tr);
}
.buscador-wrap:focus-within .buscador-wrap__icono { opacity: 1; }

.buscador-input {
  width: 100%;
  font-family: 'Jost', sans-serif;
  font-size: 14px;
  font-weight: 300;
  color: var(--charcoal);
  background: var(--cream);
  border: 1.5px solid var(--mist);
  border-radius: 100px;
  padding: 10px 40px 10px 40px;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
  -webkit-appearance: none;
  appearance: none;
}
.buscador-input::placeholder {
  color: var(--warm-mid);
  opacity: .55;
  font-weight: 300;
}
.buscador-input:focus {
  border-color: var(--terra);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(160,118,78,.1);
}
.buscador-input::-webkit-search-decoration,
.buscador-input::-webkit-search-cancel-button { display: none; }

.buscador-limpiar {
  position: absolute;
  right: 34px;
  background: var(--mist);
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--warm-mid);
  cursor: pointer;
  transition: background var(--tr), color var(--tr);
  line-height: 1;
  padding: 0;
}
.buscador-limpiar:hover { background: var(--terra); color: var(--cream); }

/* Sin resultados */
.sin-resultados {
  text-align: center;
  padding: 48px 20px;
  font-family: 'Cormorant Garamond', serif;
  font-size: 18px;
  color: var(--warm-mid);
  opacity: .65;
  font-style: italic;
}

/* Filtros de categoría */
.filtros-scroll {
  display: flex;
  gap: 8px;
  padding: 10px 20px 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.filtros-scroll::-webkit-scrollbar { display: none; }

.filtro-btn {
  flex-shrink: 0;
  font-family: 'Jost', sans-serif;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .08em;
  padding: 7px 15px;
  border-radius: 100px;
  border: 1.5px solid var(--mist);
  background: var(--cream);
  color: var(--warm-mid);
  cursor: pointer;
  transition: all var(--tr);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  line-height: 1;
}
.filtro-btn:hover { border-color: var(--terra); color: var(--terra); }
.filtro-btn.activo {
  background: var(--terra);
  border-color: var(--terra);
  color: var(--cream);
  font-weight: 500;
}

/* ─── CONTENEDOR PRINCIPAL ─── */
.main-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

/* ─── SECCIONES DE CATEGORÍA ─── */
.categoria-section {
  margin-bottom: 40px;
  transition: opacity .25s ease;
}
.categoria-section.oculta { display: none; }

.categoria-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 9.5px;
  font-weight: 400;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--sage);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--mist);
}
.categoria-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--terra);
  opacity: .5;
  flex-shrink: 0;
}

/* ─── GRID DE TARJETAS ─── */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

/* ─── TARJETA ─── */
.card {
  display: flex;
  flex-direction: column;
  background: var(--cream);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 20px 18px 16px;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2.5px;
  background: linear-gradient(90deg, var(--terra), transparent);
  opacity: 0;
  transition: opacity var(--tr);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(44,41,37,.09);
  border-color: var(--mist);
}
.card:hover::before { opacity: 1; }

.card__icon {
  font-size: 24px;
  margin-bottom: 10px;
  line-height: 1;
}
.card__title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 19px;
  font-weight: 600;
  color: var(--charcoal);
  line-height: 1.2;
  margin-bottom: 6px;
}
.card__desc {
  font-size: 12.5px;
  font-weight: 300;
  color: var(--warm-mid);
  line-height: 1.65;
  flex: 1;
}
.card__arrow {
  margin-top: 12px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .05em;
  color: var(--terra);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--tr);
}
.card:hover .card__arrow { gap: 8px; }

/* ─── BLOQUE RECUPERAR CÓDIGO ─── */
.codigo-wrap {
  margin-top: 40px;
  background: #f0f7ee;
  border: 1.5px solid #c5dfc2;
  border-radius: 16px;
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  max-width: 520px;
}
.codigo-wrap__icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.codigo-wrap__title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 19px;
  font-weight: 600;
  color: #3a2e28;
  margin-bottom: 6px;
}
.codigo-wrap__desc {
  font-size: 13px;
  color: #4a6a47;
  line-height: 1.65;
  margin-bottom: 14px;
}
.codigo-wrap__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1.5px solid #8fba8a;
  border-radius: 8px;
  padding: 9px 16px;
  font-family: 'Jost', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: #4a6a47;
  cursor: pointer;
  transition: background var(--tr);
}
.codigo-wrap__btn:hover { background: #e6f3e4; }

/* ─── FOOTER ─── */
footer {
  text-align: center;
  padding: 20px;
  border-top: 1px solid var(--mist);
  font-size: 12px;
  color: var(--warm-mid);
}
footer a { color: var(--terra); text-decoration: none; }

/* ─── MODAL ─── */
dialog::backdrop { background: rgba(58,46,40,0.45); backdrop-filter: blur(4px); }

/* ─── EMPTY STATE (cuando no hay herramientas en categoría) ─── */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--warm-mid);
  font-size: 14px;
  opacity: .6;
  display: none;
}
.empty-state.visible { display: block; }

/* ─── RESPONSIVE ─── */
@media (min-width: 480px) {
  .main-wrap { padding: 36px 24px 88px; }
  .buscador-wrap { padding: 14px 24px 0; }
  .buscador-wrap__icono { left: 38px; }
  .buscador-limpiar { right: 38px; }
  .filtros-scroll { padding: 10px 24px 12px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .nav { padding: 0 36px; }
  .header { padding: 56px 44px 44px; }
  .main-wrap { padding: 44px 32px 96px; }
  .buscador-wrap { padding: 14px 32px 0; }
  .buscador-wrap__icono { left: 46px; }
  .buscador-limpiar { right: 46px; }
  .filtros-scroll { padding: 10px 32px 12px; gap: 10px; }
  .grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 900px) {
  .main-wrap { padding: 48px 0 96px; }
  .buscador-wrap { max-width: 900px; margin: 0 auto; padding: 16px 0 0; }
  .buscador-wrap__icono { left: 14px; }
  .buscador-limpiar { right: 14px; }
  .filtros-scroll { padding: 10px 0 14px; justify-content: center; max-width: 900px; margin: 0 auto; }
}
@media (min-width: 1100px) {
  .grid { grid-template-columns: repeat(4, 1fr); }
}