/* ===== METRÓNOMO LUENA v2.0 — Diseño compacto con marca ===== */

/* Variables específicas del metrónomo */
:root {
  --metro-brand: #7A3CFF;        /* Púrpura de marca */
  --metro-accent: #f39c12;       /* Ámbar de marca */
  --metro-success: #27ae60;      /* Verde para play */
  --metro-danger: #e74c3c;       /* Rojo para stop */
  --metro-led-on: var(--metro-accent); /* LED activo color ámbar */
  --metro-shadow: 0 4px 12px rgba(0,0,0,.08);
  --metro-radius: 12px;
}

/* ===== BREADCRUMBS (SEO) ===== */
.breadcrumbs {
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  padding: .75rem 0;
  font-size: .85rem;
}

.breadcrumbs ol {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: .5rem;
  flex-wrap: wrap;
}

.breadcrumbs li:not(:last-child)::after {
  content: '›';
  margin-left: .5rem;
  color: var(--text-dim);
}

.breadcrumbs a {
  color: var(--metro-brand);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

/* ===== INTRO SEO ===== */
.seo-intro {
  background: linear-gradient(135deg, #fdfcff, #fff);
  border: 1px solid var(--metro-brand);
  border-left: 4px solid var(--metro-brand);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.seo-intro p {
  margin: 0;
  line-height: 1.6;
  color: var(--text);
  font-size: .95rem;
}

.seo-intro strong {
  color: var(--metro-brand);
  font-weight: 700;
}

/* ===== CONTENEDOR PRINCIPAL ===== */
.lm-metro {
  margin-top: 1rem;
  color: var(--text);
}

/* ===== HEADER ===== */
.lm-metro__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border);
}

.lm-metro__brand {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.lm-metro__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--metro-brand), var(--metro-accent), var(--metro-brand));
  box-shadow: 0 0 16px rgba(122, 60, 255, .4);
  animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .8; transform: scale(1.1); }
}

.lm-metro__title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  font-family: 'Montserrat', sans-serif;
}

.lm-metro__transport {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

/* ===== BOTONES ===== */
.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  padding: .65rem 1rem;
  border-radius: var(--metro-radius);
  cursor: pointer;
  font-weight: 700;
  font-size: .95rem;
  transition: all .2s ease;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--text);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--metro-shadow);
}

.btn:active {
  transform: translateY(0);
}

.btn-start {
  background: linear-gradient(180deg, #e8f7f0, #fff);
  border-color: var(--metro-success);
  color: var(--metro-success);
}

.btn-start:hover {
  background: linear-gradient(180deg, #d4f1e4, #fff);
}

.btn-stop {
  background: linear-gradient(180deg, #ffe9e9, #fff);
  border-color: var(--metro-danger);
  color: var(--metro-danger);
}

.btn-stop:hover {
  background: linear-gradient(180deg, #ffd6d6, #fff);
}

.btn-tap {
  background: linear-gradient(180deg, #f4f0ff, #fff);
  border-color: var(--metro-brand);
  color: var(--metro-brand);
}

.btn-tap:hover {
  background: linear-gradient(180deg, #e8e0ff, #fff);
}

.btn-sm {
  padding: .5rem .75rem;
  font-size: .9rem;
}

/* ===== GRID PRINCIPAL ===== */
.lm-metro__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
  .lm-metro__grid {
    grid-template-columns: 1fr;
  }
}

/* ===== TARJETAS ===== */
.lm-metro__card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--metro-radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.card-section-title {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1rem;
  font-weight: 800;
  margin: 0 0 1rem 0;
  color: var(--text);
  font-family: 'Montserrat', sans-serif;
}

.card-section-title i {
  color: var(--metro-brand);
  font-size: 1.1em;
}

/* ===== TEMPO DISPLAY ===== */
.lm-metro__tempo-display {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: .5rem;
  margin: .5rem 0 1rem;
}

.lm-metro__bpm {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--metro-brand), var(--metro-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: 'Montserrat', sans-serif;
}

.lm-metro__unit {
  color: var(--text-dim);
  font-weight: 700;
  font-size: 1.1rem;
  padding-bottom: .5rem;
}

.lm-metro__tempo-controls {
  display: flex;
  gap: .5rem;
  align-items: center;
  margin-bottom: .75rem;
}

.lm-metro__tempo-controls input[type="number"] {
  flex: 1;
  height: 42px;
  padding: 0 .75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
}

.lm-metro__slider {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: var(--panel-2);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.lm-metro__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--metro-brand), var(--metro-accent));
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(122, 60, 255, .3);
}

.lm-metro__slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--metro-brand), var(--metro-accent));
  cursor: pointer;
  border: 0;
  box-shadow: 0 2px 8px rgba(122, 60, 255, .3);
}

/* ===== LAYOUTS ===== */
.lm-metro__row {
  display: flex;
  gap: .75rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: .75rem;
}

.lm-metro__row:last-child {
  margin-bottom: 0;
}

.lm-metro__label {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: .4rem;
  font-weight: 600;
  font-size: .9rem;
  color: var(--text);
}

.lm-metro__label select,
.lm-metro__label input[type="number"] {
  padding: .5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: .95rem;
  background: var(--panel);
}

.lm-metro__label select:focus,
.lm-metro__label input:focus {
  outline: 2px solid var(--metro-brand);
  outline-offset: 2px;
}

.lm-metro__checkbox {
  display: flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  margin-top: .5rem;
}

.lm-metro__checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.lm-metro__checkbox--primary {
  background: linear-gradient(135deg, #f4f0ff, #fff);
  padding: .75rem;
  border-radius: 8px;
  border: 2px solid var(--metro-brand);
  margin-bottom: 1rem;
}

/* ===== PATRONES RÍTMICOS ===== */
.lm-metro__patterns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: .5rem;
  margin-bottom: .75rem;
}

.pattern-btn {
  padding: .6rem;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition: all .15s ease;
  font-size: .9rem;
}

.pattern-btn:hover {
  background: linear-gradient(135deg, #f4f0ff, #fff);
  border-color: var(--metro-brand);
  transform: translateY(-2px);
}

.pattern-btn:active,
.pattern-btn.active {
  background: linear-gradient(135deg, var(--metro-brand), var(--metro-accent));
  color: #fff;
  border-color: var(--metro-brand);
}

/* ===== VISUALIZACIÓN DE LEDs ===== */
.lm-metro__leds {
  display: flex;
  gap: .6rem;
  justify-content: center;
  flex-wrap: wrap;
  padding: 1.5rem 1rem;
  background: var(--panel-2);
  border-radius: 8px;
  margin-bottom: 1rem;
  min-height: 80px;
  align-items: center;
}

.lm-metro__led {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #e9eef3;
  border: 2px solid var(--border);
  box-shadow: inset 0 -3px 8px rgba(0,0,0,.05);
  transition: all .1s ease;
  position: relative;
}

.lm-metro__led::after {
  content: attr(data-num);
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-dim);
}

.lm-metro__led.on {
  background: radial-gradient(circle at 40% 35%, #fff, var(--metro-led-on));
  border-color: var(--metro-led-on);
  box-shadow: 
    0 0 20px color-mix(in srgb, var(--metro-led-on) 50%, transparent),
    inset 0 -3px 8px rgba(0,0,0,.08);
  animation: ledPulse .1s ease;
}

.lm-metro__led.dim {
  opacity: .3;
}

@keyframes ledPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* ===== BARRA DE PROGRESO ===== */
.lm-metro__progress-wrap {
  margin-bottom: 1rem;
}

.lm-metro__progress {
  position: relative;
  height: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.lm-metro__progress-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--metro-brand), var(--metro-accent));
  transition: width .1s linear;
}

/* ===== ACENTOS ===== */
.lm-metro__accent-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: .6rem;
  margin-bottom: .75rem;
}

.lm-metro__beat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .6rem;
  text-align: center;
}

.lm-metro__beat h4 {
  margin: 0 0 .5rem 0;
  font-size: .75rem;
  color: var(--text-dim);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.lm-metro__toggle {
  display: block;
  width: 100%;
  padding: .5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
  font-size: .85rem;
  transition: all .15s ease;
}

.lm-metro__toggle:hover {
  background: var(--panel-2);
}

.lm-metro__toggle.active {
  background: linear-gradient(135deg, var(--metro-brand), var(--metro-accent));
  color: #fff;
  border-color: var(--metro-brand);
}

/* ===== MODO ENTRENAMIENTO ===== */
.lm-metro__card--training {
  border: 2px solid var(--metro-brand);
  background: linear-gradient(180deg, #fdfcff, #fff);
}

.badge-new {
  display: inline-block;
  margin-left: .5rem;
  padding: .2rem .5rem;
  background: var(--metro-accent);
  color: #111;
  font-size: .7rem;
  font-weight: 800;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.lm-metro__training-controls {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.lm-metro__fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .75rem;
  margin-top: .75rem;
  background: var(--panel);
}

.lm-metro__fieldset legend {
  font-weight: 700;
  font-size: .9rem;
  padding: 0 .5rem;
  color: var(--text);
}

.lm-metro__radio {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem;
  cursor: pointer;
  border-radius: 6px;
  transition: background .15s ease;
}

.lm-metro__radio:hover {
  background: rgba(122, 60, 255, .05);
}

.lm-metro__radio input[type="radio"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.lm-metro__radio small {
  color: var(--text-dim);
  font-weight: 600;
}

/* ===== VOLUMEN Y TIMER ===== */
.lm-metro__volume-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
  margin-bottom: .75rem;
}

.lm-metro__volume-grid input[type="range"] {
  width: 100%;
}

.lm-metro__timer-input {
  display: flex;
  gap: .5rem;
  align-items: center;
  flex-wrap: wrap;
}

.lm-metro__timer-display {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--metro-brand);
  font-family: 'Courier New', monospace;
  background: var(--panel);
  padding: .5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* ===== CONSEJOS ===== */
.lm-metro__tip {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: 1rem;
  background: linear-gradient(135deg, #fff9e6, #fff);
  border: 1px solid #f39c12;
  border-radius: var(--metro-radius);
  margin-top: 1.5rem;
}

.lm-metro__tip i {
  color: var(--metro-accent);
  font-size: 1.3rem;
  flex-shrink: 0;
  margin-top: .1rem;
}

.lm-metro__tip-text {
  font-size: .95rem;
  line-height: 1.5;
  color: var(--text);
}

/* ===== BENEFICIOS ===== */
.lm-metro__benefits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.benefit-item {
  text-align: center;
}

.benefit-icon {
  font-size: 2.5rem;
  color: var(--metro-brand);
  margin-bottom: .75rem;
  display: block;
}

.benefit-item h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: .5rem;
  color: var(--text);
}

.benefit-item p {
  color: var(--text-dim);
  font-size: .95rem;
  line-height: 1.5;
}

/* ===== AYUDAS ===== */
.help {
  font-size: .85rem;
  color: var(--text-dim);
  margin-top: .5rem;
  line-height: 1.4;
}

.help strong {
  color: var(--text);
  font-weight: 700;
}

.help i {
  color: var(--metro-brand);
  margin-right: .25rem;
}

.help-inline {
  color: var(--text-dim);
  font-weight: 600;
  font-size: .9rem;
}

/* ===== SCREEN READER ONLY ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .lm-metro__header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .lm-metro__transport {
    justify-content: stretch;
  }
  
  .lm-metro__transport .btn {
    flex: 1;
    justify-content: center;
  }
  
  .lm-metro__bpm {
    font-size: 3rem;
  }
  
  .lm-metro__patterns {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .lm-metro__leds {
    gap: .4rem;
  }
  
  .lm-metro__led {
    width: 22px;
    height: 22px;
  }
  
  .lm-metro__benefits {
    grid-template-columns: 1fr;
  }
}