/* ========================================
   RESET Y VARIABLES
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  /* Colores principales */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;

  /* Neutrales */
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: #334155;

  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Bordes */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;

  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

/* ========================================
   BASE STYLES
   ======================================== */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========================================
   LAYOUT PRINCIPAL
   ======================================== */
.app-container {
  min-height: 100vh;
  padding-bottom: 6rem; /* Espacio para FABs */
}

/* ========================================
   HEADER
   ======================================== */
.header {
  position: sticky;
  top: 0;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-md);
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.header-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.header-date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.header-nav {
  position: relative;
}

.hamburger-btn {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
}

.hamburger-btn:active {
  transform: scale(0.9);
}

.menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--spacing-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: all 0.2s;
  z-index: 1000;
}

.menu-dropdown.active {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.menu-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border: none;
  background: transparent;
  color: var(--text-primary);
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.875rem;
}

.menu-item:hover {
  background: var(--bg-card-hover);
}

.menu-item:active {
  transform: scale(0.98);
}

.menu-item:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.menu-item:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.menu-item-icon {
  font-size: 1.25rem;
}

.routine-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
}

.routine-selector {
  position: relative;
}

.routine-name {
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.selector-arrow {
  font-size: 0.6rem;
  transition: transform 0.2s;
}

.selector-arrow.open {
  transform: rotate(180deg);
}

.day-selector-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  min-width: 250px;
  z-index: 500;
  overflow: hidden;
}

.day-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border: none;
  background: transparent;
  color: var(--text-primary);
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s;
  font-size: 0.875rem;
}

.day-option:hover {
  background: var(--bg-card-hover);
}

.day-option.active {
  background: var(--primary);
  color: white;
}

.day-option-day {
  font-weight: 600;
  text-transform: capitalize;
}

.day-option-routine {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.day-option.active .day-option-routine {
  color: rgba(255, 255, 255, 0.8);
}

.routine-progress {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ========================================
   CONTENIDO PRINCIPAL
   ======================================== */
.main-content {
  padding: var(--spacing-md);
}

/* ========================================
   TARJETA DE EJERCICIO
   ======================================== */
.exercise-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

.exercise-card.completed {
  opacity: 0.6;
  border-color: var(--success);
}

.exercise-card.skipped {
  opacity: 0.4;
  border-color: var(--text-secondary);
}

.exercise-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-sm);
}

.exercise-info {
  flex: 1;
  min-width: 0; /* Permite que el texto se pueda truncar */
}

.exercise-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.exercise-muscle {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.exercise-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0; /* No permitir que los botones se encojan */
}

.icon-button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 1.1rem;
}

.icon-button:active {
  transform: scale(0.9);
}

.icon-button.info:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.icon-button.skip:hover {
  background: var(--warning);
  border-color: var(--warning);
  color: white;
}

.icon-button.nav {
  background: var(--bg-card-hover);
}

.icon-button.nav:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ========================================
   CONTROL DE PESO GLOBAL
   ======================================== */
.weight-control {
  background: var(--bg-card-hover);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.weight-input {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  text-align: center;
  font-weight: 600;
}

.weight-input::placeholder {
  color: var(--text-secondary);
}

.apply-weight-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.apply-weight-btn:active {
  transform: scale(0.95);
  background: var(--primary-dark);
}

/* ========================================
   LISTA DE SERIES (FILAS)
   ======================================== */
.sets-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.set-row {
  background: var(--bg-dark);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  transition: all 0.2s;
}

.set-row.completed {
  background: var(--success);
  border-color: var(--success);
  color: white;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.set-row-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.set-info {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
}

.set-number {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.set-row.completed .set-number {
  color: rgba(255, 255, 255, 0.9);
}

.set-reps {
  font-size: 1.25rem;
  font-weight: 700;
}

.last-weight {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-style: italic;
}

.set-row.completed .last-weight {
  color: rgba(255, 255, 255, 0.8);
}

.set-row-controls {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

/* Input de peso individual en cada serie */
.set-weight-input {
  background: var(--bg-card);
  border: 2px solid var(--primary);
  color: var(--text-primary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  flex: 1;
  min-width: 0;
}

.set-weight-input::placeholder {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.set-weight-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.set-complete-btn {
  background: var(--success);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
  min-width: 110px;
}

.set-complete-btn:active {
  transform: scale(0.95);
}

.set-complete-btn.completed {
  background: rgba(255, 255, 255, 0.2);
}

.set-weight-display {
  font-size: 1.5rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.95);
}

/* Botón omitir ejercicio */
.skip-exercise-btn {
  width: 100%;
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--text-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  cursor: pointer;
  margin-top: var(--spacing-md);
  transition: all 0.2s;
}

.skip-exercise-btn:hover {
  background: var(--warning);
  border-color: var(--warning);
  border-style: solid;
  color: white;
}

.skip-exercise-btn:active {
  transform: scale(0.98);
}

/* ========================================
   FLOATING ACTION BUTTONS (FABs)
   ======================================== */
.fab-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  z-index: 1000;
}

.fab {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: all 0.3s;
}

.fab:active {
  transform: scale(0.9);
}

.fab.timer {
  background: var(--warning);
}

.fab.history {
  background: var(--bg-card);
  border: 2px solid var(--border);
}

/* Timer badge */
.timer-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--danger);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

/* ========================================
   TIMER MODAL
   ======================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  padding: var(--spacing-lg);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  transform: scale(0.9);
  transition: transform 0.3s;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.timer-display {
  font-size: 4rem;
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
  margin: var(--spacing-xl) 0;
  color: var(--primary);
}

.timer-controls {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.btn {
  flex: 1;
  padding: var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 0 0 2px transparent;
}

.btn-primary:active {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5);
}

.btn-danger {
  background: var(--danger);
  color: white;
  box-shadow: 0 0 0 2px transparent;
}

.btn-danger:active {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.5);
}

.btn-secondary {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.btn:active {
  transform: scale(0.95);
  opacity: 0.9;
}

/* ========================================
   ESTADOS VACÍOS
   ======================================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.empty-text {
  font-size: 0.875rem;
}

/* ========================================
   UTILIDADES
   ======================================== */
.hidden {
  display: none !important;
}

.loading {
  opacity: 0.5;
  pointer-events: none;
}

/* Input number sin flechas */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 640px) {
  .fab-container {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }

  .weight-control {
    flex-direction: column;
  }

  .apply-weight-btn {
    width: 100%;
  }
}

/* ========================================
   GIF PICKER
   ======================================== */
._gp_wrap { position: relative; }
._gp_icon {
  position: absolute; left: 0.65rem; top: 50%; transform: translateY(-50%);
  color: var(--text-secondary); font-size: 0.9rem; pointer-events: none;
}
._gp_input {
  width: 100%; background: var(--bg-dark);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 0.55rem 0.65rem 0.55rem 2rem;
  color: var(--text-primary); font-size: 0.88rem; outline: none;
}
._gp_input:focus { border-color: var(--primary); }
._gp_input::placeholder { color: var(--text-secondary); }
._gp_input:disabled { opacity: 0.5; cursor: not-allowed; }

._gp_drop {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px);
  background: #243044; border: 1px solid var(--primary);
  border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  z-index: 200; max-height: 260px; overflow-y: auto; display: none;
}
._gp_drop.open { display: block; }
._gp_drop::-webkit-scrollbar { width: 4px; }
._gp_drop::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

._gp_item {
  display: flex; align-items: center; gap: 0.65rem;
  padding: 0.5rem 0.75rem; cursor: pointer;
  border-bottom: 1px solid rgba(255,255,255,0.04); transition: background 0.1s;
}
._gp_item:hover { background: rgba(59,130,246,0.12); }
._gp_item_thumb {
  width: 40px; height: 40px; border-radius: 0.35rem;
  object-fit: cover; flex-shrink: 0; background: var(--border); cursor: pointer;
}
._gp_item_info { flex: 1; min-width: 0; }
._gp_item_name {
  font-size: 0.83rem; font-weight: 600; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
._gp_custom {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 0.75rem; cursor: pointer;
  color: var(--text-secondary); font-size: 0.8rem;
  background: rgba(148,163,184,0.04); border-top: 1px solid rgba(255,255,255,0.06);
}
._gp_custom:hover { background: rgba(148,163,184,0.1); color: var(--text-primary); }
._gp_custom_plus { font-size: 1rem; font-weight: 700; color: var(--primary); }

._gp_sel { display: flex; align-items: flex-start; gap: 0.65rem; }
._gp_sel_thumb {
  width: 52px; height: 52px; border-radius: 0.5rem;
  object-fit: cover; border: 1.5px solid rgba(59,130,246,0.35);
  cursor: pointer; flex-shrink: 0; transition: border-color 0.15s;
}
._gp_sel_thumb:hover { border-color: var(--primary); }
._gp_no_gif {
  width: 52px; height: 52px; border-radius: 0.5rem;
  border: 1.5px dashed var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); font-size: 1.1rem; flex-shrink: 0;
}
._gp_sel_info { flex: 1; min-width: 0; }
._gp_sel_name {
  font-size: 0.88rem; font-weight: 700; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 0.25rem;
}
._gp_change {
  background: none; border: none; color: var(--text-secondary);
  font-size: 0.72rem; cursor: pointer; padding: 0;
  text-decoration: underline; text-underline-offset: 2px; margin-top: 0.2rem;
  display: inline-block;
}
._gp_change:hover { color: var(--primary); }
._gp_change:disabled { opacity: 0.3; cursor: not-allowed; text-decoration: none; }
._gp_remove {
  background: none; border: none; color: var(--border);
  font-size: 0.95rem; cursor: pointer; padding: 0.1rem 0.3rem; flex-shrink: 0;
}
._gp_remove:hover { color: var(--danger); }
._gp_remove:disabled { opacity: 0.3; cursor: not-allowed; }

._gp_badge {
  display: inline-block; font-size: 0.68rem; font-weight: 600;
  padding: 0.12rem 0.4rem; border-radius: 999px;
}
._gp_m_pecho       { background: rgba(239,68,68,0.15);  color: #fca5a5; }
._gp_m_espalda     { background: rgba(16,185,129,0.15); color: #6ee7b7; }
._gp_m_hombros     { background: rgba(245,158,11,0.15); color: #fcd34d; }
._gp_m_biceps      { background: rgba(59,130,246,0.15); color: #93c5fd; }
._gp_m_triceps     { background: rgba(139,92,246,0.15); color: #c4b5fd; }
._gp_m_cuadriceps  { background: rgba(234,179,8,0.15);  color: #fde68a; }
._gp_m_gluteos     { background: rgba(236,72,153,0.15); color: #f9a8d4; }
._gp_m_abdominales { background: rgba(20,184,166,0.15); color: #5eead4; }
._gp_m_gemelos     { background: rgba(249,115,22,0.15); color: #fed7aa; }
._gp_m_isquiotibiales { background: rgba(6,182,212,0.15); color: #67e8f9; }
._gp_m_trapecios   { background: rgba(168,85,247,0.15); color: #d8b4fe; }
._gp_m_custom      { background: rgba(148,163,184,0.1); color: var(--text-secondary); }

._gp_modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.85);
  z-index: 9999; align-items: center; justify-content: center; padding: 2rem;
}
._gp_modal_box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.25rem;
  max-width: 360px; width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 0.9rem;
  animation: _gp_in 0.18s ease;
}
@keyframes _gp_in {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}
._gp_modal_title { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); text-align: center; }
._gp_modal_img {
  width: 100%; max-height: 320px; object-fit: contain;
  border-radius: var(--radius-md); background: #0a0f1a;
}
._gp_modal_close {
  background: var(--bg-card-hover); border: 1px solid var(--border);
  color: var(--text-primary); border-radius: var(--radius-sm);
  padding: 0.6rem 1.5rem; font-size: 0.88rem; font-weight: 600;
  cursor: pointer; width: 100%;
}

/* ========================================
   NOTIFICACIONES
   ======================================== */
@keyframes slideDown {
  from { transform: translateX(-50%) translateY(-100%); opacity: 0; }
  to { transform: translateX(-50%) translateY(0); opacity: 1; }
}