/* ═══════════════════════════════════════════════════════════════════════════
   LP BUTTONS — spec canónica v1 (Learn Platform)
   Replicada en cada app (sin build step). Fuente de verdad: INFORME-BOTONES.md §4.1
   3 primitivas: .lp-btn (acción) · .lp-icon-btn (icono circular) · .lp-pill (tab)
   Reglas: touch target ≥44px, cero literales de color, radius por token,
           :focus-visible y :disabled obligatorios.
   ═══════════════════════════════════════════════════════════════════════════ */

/* 1. Botón de acción */
.lp-btn {
  font-family: var(--lp-font-body);
  font-weight: var(--lp-weight-bold);
  font-size: 0.8rem;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--lp-radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none;
  transition: transform 0.2s var(--lp-ease), box-shadow 0.2s, opacity 0.2s;
}
.lp-btn:hover  { transform: translateY(-2px); }
.lp-btn:active { transform: translateY(0) scale(0.97); }

/* Variantes semánticas (sombra derivada del token, no rgba a mano) */
.lp-btn--primary { background: var(--lp-primary, var(--lp-accent)); color: #fff;
  box-shadow: 0 3px 12px color-mix(in srgb, var(--lp-primary, var(--lp-accent)) 25%, transparent); }
.lp-btn--success { background: var(--lp-success); color: var(--lp-ink-inverse);
  box-shadow: 0 3px 12px color-mix(in srgb, var(--lp-success) 25%, transparent); }
.lp-btn--danger  { background: var(--lp-error);   color: var(--lp-ink-inverse);
  box-shadow: 0 3px 12px color-mix(in srgb, var(--lp-error) 20%, transparent); }
.lp-btn--purple  { background: var(--lp-cat-purple); color: var(--lp-ink-inverse);
  box-shadow: 0 3px 12px color-mix(in srgb, var(--lp-cat-purple) 25%, transparent); }
.lp-btn--ghost   { background: var(--lp-surface); color: var(--lp-ink-soft);
  border: 1.5px solid var(--lp-border); box-shadow: none; }
.lp-btn--ghost:hover { border-color: var(--lp-accent); color: var(--lp-accent); }

/* 2. Botón de icono circular (tema, home, back, toggles del player) */
.lp-icon-btn {
  width: var(--lp-navbtn-size);
  height: var(--lp-navbtn-size);
  border-radius: var(--lp-navbtn-radius);
  border: var(--lp-navbtn-border-width) solid var(--lp-navbtn-border);
  background: var(--lp-navbtn-bg);
  color: var(--lp-navbtn-icon-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.9rem;
  box-shadow: var(--lp-navbtn-shadow);
  transition: border-color 0.2s, transform 0.2s, background 0.2s, box-shadow 0.2s, color 0.2s;
}
.lp-icon-btn:hover { border-color: var(--lp-navbtn-accent); transform: scale(1.06); box-shadow: var(--lp-navbtn-shadow-hover); }
.lp-icon-btn.active {
  background: var(--lp-accent-soft);
  border-color: color-mix(in srgb, var(--lp-accent) 35%, transparent);
  color: var(--lp-accent-dark);
}

/* 3. Píldora / tab segmentada */
.lp-pill {
  font-family: var(--lp-font-body);
  font-size: 0.7rem;
  font-weight: var(--lp-weight-bold);
  min-height: 36px;
  padding: 7px 12px;
  border-radius: var(--lp-radius-full);
  border: none;
  background: transparent;
  color: var(--lp-muted);
  cursor: pointer;
  position: relative;
  transition: all 0.2s var(--lp-ease);
}
/* Área táctil extendida a 44px sin cambiar el tamaño visual */
.lp-pill::after, .lp-icon-btn--sm::after {
  content: '';
  position: absolute;
  inset: 50%;
  translate: -50% -50%;
  min-width: 44px;
  min-height: 44px;
  width: 100%;
  height: 100%;
}
.lp-pill.active {
  background: var(--lp-ink); color: var(--lp-bg);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--lp-ink) 25%, transparent);
}

/* Estados comunes — SIEMPRE presentes */
.lp-btn:focus-visible, .lp-icon-btn:focus-visible, .lp-pill:focus-visible {
  outline: 2px solid var(--lp-accent);
  outline-offset: 2px;
}
.lp-btn:disabled, .lp-icon-btn:disabled, .lp-pill:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

/* Icono circular compacto: 36px visual, hit-area 44 vía ::after */
.lp-icon-btn--sm {
  width: 36px;
  height: 36px;
  position: relative;
}

.lp-icon-btn[hidden],
.navigation-launcher[hidden],
.topbar-back[hidden],
.topbar-menu[hidden] {
  display: none !important;
}

/* Ghost nav — app bar mobile (sin círculo/borde/sombra web) */
@media (max-width: 860px) {
  .navigation-launcher,
  .topbar-back,
  .topbar-menu,
  .top-bar > a.lp-icon-btn,
  .top-bar .top-bar__start .lp-icon-btn,
  .top-bar .top-bar__end .lp-icon-btn,
  .top-bar .top-bar__end button.lp-icon-btn[aria-controls="exerciseSidebar"] {
    border: none;
    border-radius: var(--lp-radius-md);
    background: transparent;
    box-shadow: none;
    color: var(--lp-ink-soft);
    font-size: 1.0625rem;
    font-weight: 400;
  }

  .navigation-launcher:hover,
  .topbar-back:hover,
  .topbar-menu:hover,
  .top-bar > a.lp-icon-btn:hover,
  .top-bar .top-bar__start .lp-icon-btn:hover,
  .top-bar .top-bar__end .lp-icon-btn:hover,
  .top-bar .top-bar__end button.lp-icon-btn[aria-controls="exerciseSidebar"]:hover {
    background: color-mix(in srgb, var(--lp-ink) 5%, transparent);
    border-color: transparent;
    box-shadow: none;
    transform: none;
    color: var(--lp-ink);
  }

  .navigation-launcher:active,
  .topbar-back:active,
  .topbar-menu:active,
  .top-bar > a.lp-icon-btn:active,
  .top-bar .top-bar__start .lp-icon-btn:active,
  .top-bar .top-bar__end .lp-icon-btn:active,
  .top-bar .top-bar__end button.lp-icon-btn[aria-controls="exerciseSidebar"]:active {
    background: color-mix(in srgb, var(--lp-ink) 9%, transparent);
    transform: scale(0.97);
  }

  /* Sidebar pin es desktop-only — ocultar toggle de modo nav en mobile/tablet */
  .nav-mode-toggle {
    display: none;
  }
}