body {
  -webkit-tap-highlight-color: transparent;
  padding-bottom: env(safe-area-inset-bottom);
}

.app-shell {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.field {
  margin-bottom: var(--space-4);
}
.field label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}
.field input, .field select, .field textarea {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
}

.app-header {
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 10;
}
.app-header .brand span { color: var(--color-accent); }
.brand-logo {
  height: 24px;
  width: 24px;
  object-fit: contain;
  border-radius: 6px;
  vertical-align: -5px;
  margin-right: 8px;
}

.app-main {
  flex: 1;
  padding: var(--space-4);
}

.day-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-card);
}

.exercise-card {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.exercise-card:last-child { border-bottom: none; }
.exercise-gif {
  width: 84px;
  height: 84px;
  border-radius: var(--radius-md);
  object-fit: cover;
  background: var(--color-bg-elevated);
  flex-shrink: 0;
}
.exercise-info { flex: 1; min-width: 0; }
.exercise-name { font-weight: 600; margin-bottom: 2px; }
.exercise-meta { font-size: 0.82rem; color: var(--color-text-muted); }

@media (max-width: 420px) {
  .exercise-card { flex-direction: column; }
  .exercise-gif { width: 100%; height: 120px; }
}

.set-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-2);
}
.set-row input {
  width: 52px;
  padding: var(--space-2) var(--space-1);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  text-align: center;
}
.set-row .set-label { width: 20px; color: var(--color-text-muted); font-size: 0.8rem; }

.btn-block {
  display: block;
  width: 100%;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: none;
  background: var(--gradient-accent);
  color: white;
  font-weight: 700;
  font-size: 1rem;
  margin-top: var(--space-4);
  transition: transform var(--transition-fast);
}
.btn-block:active { transform: scale(0.98); }
.btn-block.btn-secondary { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }

.pain-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-top: var(--space-3);
}

.survey-step { display: none; }
.survey-step.active { display: block; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  margin: 0 var(--space-2) var(--space-2) 0;
  font-size: 0.85rem;
  cursor: pointer;
}
.chip.selected {
  border-color: var(--color-accent);
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-accent);
}

/* ── Tarjeta de ejercicio expandida/colapsada ───────────────── */

.exercise-card-collapsed {
  cursor: pointer;
  align-items: center;
  transition: background var(--transition-fast);
}
.exercise-card-collapsed:hover { background: var(--color-bg-elevated); }
.exercise-gif-small { width: 56px; height: 56px; }
.exercise-gif-large { width: 100%; max-width: 220px; height: 220px; margin: 0 auto; display: block; }
.exercise-card-expanded {
  flex-direction: column;
  animation: fadeIn var(--transition-base);
  box-shadow: var(--shadow-elevated);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.exercise-card-expanded .exercise-info { width: 100%; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.technique {
  margin: var(--space-3) 0;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}
.technique summary {
  cursor: pointer;
  color: var(--color-accent);
  font-weight: 600;
}
.technique ol { padding-left: 1.2em; margin-top: var(--space-2); }

.term-help-box {
  margin-bottom: var(--space-3);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}
.term-help-box summary { cursor: pointer; color: var(--color-accent); font-weight: 600; }
.term-help-box p { margin: var(--space-2) 0 0; }

.summary-stat {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}
.summary-stat:last-child { border-bottom: none; }
.pr-badge {
  display: inline-block;
  background: var(--color-success);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: var(--space-2);
  animation: prGlow 1.6s ease-in-out 2;
}
@keyframes prGlow {
  0%, 100% { box-shadow: 0 0 0 rgba(34, 197, 94, 0); }
  50% { box-shadow: 0 0 10px 2px rgba(34, 197, 94, 0.6); }
}

/* ── Barra de navegación inferior ───────────────────────────── */

.app-shell.has-bottom-nav .app-main {
  padding-bottom: calc(72px + env(safe-area-inset-bottom));
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 20;
}
.bottom-nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-2) 0;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.7rem;
}
.bottom-nav-tab.active { color: var(--color-accent); }

/* ── Chat con el asistente ──────────────────────────────────── */

.chat-messages {
  max-height: 55vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}
.chat-bubble {
  max-width: 85%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  line-height: 1.45;
}
.chat-bubble.me {
  align-self: flex-end;
  background: var(--color-accent);
  color: white;
  border-bottom-right-radius: 4px;
}
.chat-bubble.bot {
  align-self: flex-start;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 4px;
}
.chat-bubble.typing { color: var(--color-text-muted); letter-spacing: 2px; }
.chat-switcher {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.tab-badge {
  position: absolute;
  top: 2px;
  right: calc(50% - 18px);
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background: var(--color-danger);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.bottom-nav-tab { position: relative; }
.chat-input-row {
  display: flex;
  gap: var(--space-2);
}
.chat-input-row input {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

/* ── Temporizador de cardio ─────────────────────────────────── */

.cardio-timer {
  text-align: center;
  margin-top: var(--space-3);
}
.timer-display {
  font-size: 2.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}
.timer-phase {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

/* ── Bloque de calentamiento y tarjetas de consejo ──────────── */

.warmup-block { margin-bottom: var(--space-3); }

.disclaimer { font-size: 0.8rem; color: var(--color-text-muted); font-style: italic; }
.tip-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}
.tip-card p { margin: var(--space-1) 0 0; font-size: 0.88rem; color: var(--color-text-muted); }
.tip-caution { color: var(--color-warning) !important; }

/* ── Reservas de clases ──────────────────────────────────────── */

.today-class-banner {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-accent);
  background: rgba(59, 130, 246, 0.08);
  font-size: 0.9rem;
  margin-bottom: var(--space-3);
}

.class-instance {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
}
.class-instance.mine { border-color: var(--color-accent); background: rgba(59, 130, 246, 0.06); }

/* ── Gamificación: racha y logros ────────────────────────────── */

.streak-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(255, 122, 24, 0.12), rgba(255, 61, 61, 0.08));
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
}
.streak-flame { font-size: 2rem; }
.streak-count { font-weight: 700; font-size: 1.05rem; }
.streak-sub { font-size: 0.82rem; color: var(--color-text-muted); }

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}
.achievement {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  text-align: center;
}
.achievement-icon { font-size: 1.5rem; }
.achievement-title { font-size: 0.68rem; line-height: 1.2; }
.achievement.unlocked { border-color: var(--color-accent); background: rgba(59, 130, 246, 0.08); }
.achievement.locked { opacity: 0.35; filter: grayscale(1); }

.achievement-celebration {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-accent);
  background: rgba(59, 130, 246, 0.08);
  margin-bottom: var(--space-2);
  animation: achievementPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes achievementPop {
  from { opacity: 0; transform: scale(0.7) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ═══ Rediseño visual: identidad "dorsal/marcador" ═══════════════
   La display condensada en mayúsculas lleva la personalidad; el color
   de acento sigue siendo la variable de marca de cada gimnasio. */

.app-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent);
  backdrop-filter: blur(8px);
}
.app-header .brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.day-card {
  border: 1px solid rgba(255, 255, 255, 0.05);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 45%),
    var(--color-bg-card);
}
.day-card h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Entrada de pantalla: cada vista aparece con un fade-up corto. */
.app-main > * { animation: screenEnter 260ms ease both; }
@keyframes screenEnter {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Hero de sesión (pantalla Hoy): la firma visual de la app ── */

.session-hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-4) var(--space-4) var(--space-3);
  margin: calc(-1 * var(--space-4)) calc(-1 * var(--space-4)) var(--space-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background:
    radial-gradient(120% 140% at 100% 0%, color-mix(in srgb, var(--color-accent) 22%, transparent), transparent 55%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent);
}
.session-hero .hero-eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 2px;
}
.session-hero .hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 9vw, 2.9rem);
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin: 0 0 var(--space-2);
}
.session-hero .hero-meta {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}
.session-hero .hero-sets {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.session-hero .hero-sets strong { color: var(--color-accent); }
.session-hero .hero-bar {
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  margin-top: var(--space-2);
  overflow: hidden;
}
.session-hero .hero-bar > div {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--color-accent);
  transition: width 400ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* Serie registrada: check que se llena + fila que se apaga suave. */
.log-set-btn { transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast); }
.set-row.logged .log-set-btn {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  animation: setPop 320ms cubic-bezier(0.34, 1.56, 0.64, 1);
}
.set-row.logged input { opacity: 0.55; }
@keyframes setPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

/* Nav inferior: pill activa en lugar de solo color. */
.bottom-nav { border-top: 1px solid rgba(255, 255, 255, 0.06); backdrop-filter: blur(10px); }
.bottom-nav-tab { border-radius: var(--radius-md); transition: color var(--transition-fast), background var(--transition-fast); }
.bottom-nav-tab.active {
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 14%, transparent);
}

/* ── Onboarding: wizard a pantalla completa ─────────────────── */

.ob-screen {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-4) 0 var(--space-8);
}
.ob-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.ob-top .ob-gym {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
}
.ob-top img { width: 34px; height: 34px; border-radius: 8px; object-fit: cover; }
.ob-step-label { font-size: 0.8rem; color: var(--color-text-muted); white-space: nowrap; }

.ob-progress {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  margin-bottom: var(--space-6);
}
.ob-progress > div {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent), color-mix(in srgb, var(--color-accent) 60%, white));
  transition: width 350ms cubic-bezier(0.22, 1, 0.36, 1);
}

.ob-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.1rem;
  line-height: 1;
  text-transform: uppercase;
  margin: 0 0 var(--space-1);
}
.ob-sub { color: var(--color-text-muted); font-size: 0.92rem; margin: 0 0 var(--space-6); }

/* Tarjetas de opción: targets grandes, una elección por tarjeta. */
.option-cards { display: grid; gap: var(--space-2); margin-bottom: var(--space-4); }
.option-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}
.option-card:active { transform: scale(0.985); }
.option-card .oc-icon { font-size: 1.5rem; width: 36px; text-align: center; flex-shrink: 0; }
.option-card .oc-title { font-weight: 600; }
.option-card .oc-desc { font-size: 0.8rem; color: var(--color-text-muted); }
.option-card.selected {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 12%, var(--color-bg-card));
  box-shadow: 0 0 0 1px var(--color-accent);
}

/* Chips grandes (números, escalas) */
.big-chips { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.big-chips .chip {
  min-width: 52px;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
}

.ob-nav { display: flex; gap: var(--space-2); margin-top: var(--space-6); }
.ob-nav .btn-block { min-height: 52px; font-size: 1rem; }

.ob-summary { list-style: none; padding: 0; margin: 0 0 var(--space-4); }
.ob-summary li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.9rem;
}
.ob-summary li span:first-child { color: var(--color-text-muted); }

.ob-powered {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-6);
}

@media (prefers-reduced-motion: reduce) {
  .app-main > *, .set-row.logged .log-set-btn, .achievement-celebration { animation: none !important; }
  .session-hero .hero-bar > div, .ob-progress > div { transition: none !important; }
}

/* ── Fuerza v2: prescripción de la sesión, calentamiento y lecturas de carga ── */

.rx-box {
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm, 8px);
  padding: var(--space-2) var(--space-3);
  margin: var(--space-2) 0;
}
.rx-box.rx-loading { opacity: 0.6; }
.rx-head {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
.rx-reason { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 2px; }
.rx-ramp, .rx-last { font-size: 0.75rem; color: var(--color-text-muted); margin-top: 4px; }
.rx-record {
  background: var(--color-success);
  color: #fff;
  font-weight: 700;
  font-size: 0.8rem;
  border-radius: 999px;
  padding: 2px 10px;
  display: inline-block;
  margin-bottom: var(--space-2);
}

/* El calentamiento se distingue de un vistazo: no es la sesión, es la rampa. */
.set-row-warmup { opacity: 0.75; }
.set-row-warmup .set-label {
  background: transparent;
  border: 1px dashed var(--color-border);
  color: var(--color-text-muted);
}

.fatigue-bar, .volume-bar {
  display: inline-block;
  width: 84px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
}
.fatigue-bar > i, .volume-bar > i {
  display: block;
  height: 100%;
  background: var(--color-accent);
  border-radius: 999px;
}

/* Subfilas de drop-set y rest-pause: trabajo que cuelga de una serie. */
.subrows {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 2px 0 8px 28px;
}
.subrow {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}
.subrow input {
  width: 68px;
  padding: 4px 6px;
  font-size: 0.8rem;
}
.subrows .add-sub-btn {
  align-self: flex-start;
  font-size: 0.75rem;
  padding: 3px 10px;
}

/* Test de fuerza a mano dentro del bloque de 1RM. */
.onerm-form { margin-top: var(--space-3); }
.onerm-form summary { cursor: pointer; font-weight: 600; }
.onerm-form input[type="text"], .onerm-form input[type="number"] {
  padding: 8px 10px;
  margin-top: 6px;
}
.onerm-form input[type="text"] { width: 100%; }
.orm-row { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.orm-row input { width: 90px; }
.orm-result {
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  font-size: 0.88rem;
}