:root {
  /* Paleta Normal (Clara) */
  --bg-body: #e3ebd9;             /* Fondo exterior general */
  --window-bg: #dcecc9;           /* Marco/Ventana principal */
  --pomo-card: #9bb979;           /* Tarjeta izquierda Pomodoro */
  --pomo-tab-bg: rgba(0, 0, 0, 0.08); /* Pestañas de descanso/trabajo */
  --pomo-tab-active: #3e5229;     /* Pestaña activa */
  --tasks-header: #3d5428;        /* Banner superior Tareas */
  --tasks-body: #e4f0d7;          /* Fondo contenedor de tareas */
  --task-item-bg: #ffffff;        /* Ítems no seleccionados */
  --task-item-active: #ffffff;    /* Ítem seleccionado */
  --text-dark: #1e2d13;           /* Color texto principal */
  --text-light: #ffffff;          /* Color texto secundario / contrastante */
  --btn-dark: #3a4e26;
  --btn-light: #eaf3e1;
  --popover-bg: #f0f5e8;          /* Fondo de modales/popovers */
  --input-border: #8e9e7d;       /* Bordes de entradas e insumos */
  --meta-info-bg: #f1f5eb;        /* Etiquetas de pomodoros estimados */
}

/* =========================================
   MODO OSCURO (DARK THEME)
   ========================================= */
body.dark-theme {
  --bg-body: #181d15;
  --window-bg: #222a1e;
  --pomo-card: #2c3826;
  --pomo-tab-bg: rgba(255, 255, 255, 0.08);
  --pomo-tab-active: #4a5e3b;
  --tasks-header: #1b2615;
  --tasks-body: #253021;
  --task-item-bg: #1e271a;
  --task-item-active: #303d2a;
  --text-dark: #e1e8dc;
  --text-light: #ffffff;
  --btn-dark: #475a37;
  --btn-light: #323e2d;
  --popover-bg: #2a3426;
  --input-border: #4a5c41;
  --meta-info-bg: #192216;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Quicksand', sans-serif;
}

body {
  background-color: var(--bg-body);
  color: var(--text-dark);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 30px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* VENTANA PRINCIPAL (Contenedor Web) */
.app-window {
  background-color: var(--window-bg);
  width: 100%;
  max-width: 1280px;
  min-height: 720px;
  border-radius: 28px;
  padding: 20px 28px 32px 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease;
}

/* Puntos estilo Mac (Red, Yellow, Green) */
.window-header {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
}
.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

/* Cuerpo principal: Grid de 2 columnas */
.app-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  flex-grow: 1;
}

@media (max-width: 900px) {
  .app-body {
    grid-template-columns: 1fr;
  }
}

/* =========================================
   1. SECCIÓN IZQUIERDA: POMODORO
   ========================================= */
.pomodoro-card {
  position: relative; /* Permite posicionar el popover dentro de la tarjeta */
  background-color: var(--pomo-card);
  border-radius: 28px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  transition: background-color 0.3s ease;
}

/* Selector de pestañas superiores */
.pomo-tabs {
  background-color: var(--pomo-tab-bg);
  padding: 6px;
  border-radius: 40px;
  display: flex;
  gap: 6px;
  width: 100%;
  max-width: 420px;
  justify-content: space-between;
}

.tab-btn {
  border: none;
  background: transparent;
  padding: 10px 22px;
  border-radius: 30px;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.tab-btn.active {
  background-color: var(--pomo-tab-active);
  color: #ffffff;
}

/* Reloj Principal */
.timer-display {
  font-size: 6.5rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -2px;
  line-height: 1;
  margin: 15px 0;
}

/* Botones de Control */
.controls-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-pill {
  background-color: var(--btn-light);
  color: var(--text-dark);
  border: none;
  border-radius: 30px;
  padding: 12px 24px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-play-pause {
  background-color: var(--btn-dark);
  color: #ffffff;
  border: none;
  border-radius: 30px;
  padding: 12px 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.2rem;
}

.btn-settings {
  background-color: var(--btn-dark);
  color: #ffffff;
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Información Inferior */
.info-row {
  display: flex;
  justify-content: space-around;
  width: 100%;
  margin: 15px 0;
}

.info-block {
  text-align: center;
}

.info-label {
  font-size: 0.9rem;
  color: var(--text-dark);
  opacity: 0.75;
  font-weight: 600;
}

.info-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-top: 2px;
}

/* Ilustración inferior */
.illustration-card {
  width: 100%;
  background-color: var(--window-bg);
  border-radius: 22px;
  padding: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 150px;
}

/* =========================================
   2. SECCIÓN DERECHA: TAREAS
   ========================================= */
.tasks-container {
  background-color: var(--tasks-body);
  border-radius: 28px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease;
}

/* Header Verde Oscuro */
.tasks-header {
  position: relative;
  background-color: var(--tasks-header);
  color: #ffffff;
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top-left-radius: 28px;
  border-top-right-radius: 28px;
}

.tasks-title {
  font-size: 2.2rem;
  font-weight: 700;
}

.btn-add-task {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border: none;
  border-radius: 20px;
  padding: 8px 18px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-add-task:hover {
  background-color: rgba(255, 255, 255, 0.35);
}

/* Lista de Tareas y Grupos */
.tasks-list-wrapper, .tasks-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.group-item {
  margin-bottom: 10px;
}

.group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 5px;
  color: var(--text-dark);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.5px;
}

.group-tasks {
  display: none;
  flex-direction: column;
  gap: 8px;
  margin-top: 5px;
}

.group-tasks.open {
  display: flex;
}

.task-row {
  background-color: var(--task-item-bg);
  color: var(--text-dark);
  border-radius: 25px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
  transition: background-color 0.3s ease;
}

.task-row.task-active {
  border: 2px solid var(--btn-dark);
}

.task-row.completed .task-text {
  text-decoration: line-through;
  opacity: 0.6;
}

.task-text {
  flex: 1;
  margin-left: 10px;
  font-weight: 600;
  color: var(--text-dark);
  font-size: 0.92rem;
}

.task-meta-info {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dark);
  background-color: var(--meta-info-bg);
  padding: 2px 8px;
  border-radius: 10px;
  margin: 0 8px;
}

.task-action-icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dark);
  font-size: 1rem;
  padding: 2px 4px;
  opacity: 0.8;
}

.task-action-icon-btn:hover {
  opacity: 1;
}

/* Checkbox estilo píldora/cuadro redondeado */
.checkbox, .task-checkbox {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  border: 2px solid var(--btn-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background-color: transparent;
  appearance: none;
  outline: none;
}

.checkbox.checked, .task-checkbox:checked {
  background-color: var(--btn-dark);
  color: white;
}

.task-checkbox:checked::after {
  content: '✓';
  color: white;
  font-size: 14px;
}

/* =========================================
   POPOVER DE CONFIGURACIÓN (SETTINGS)
   ========================================= */

.settings-popover {
  display: none; /* Oculto por defecto */
  position: absolute;
  top: 75px;
  right: 28px;
  width: 320px;
  background-color: var(--popover-bg);
  border-radius: 22px;
  padding: 20px 22px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--input-border);
  z-index: 1000;
  color: var(--text-dark);
  transition: background-color 0.3s ease;
}

.settings-popover.active {
  display: block;
}

/* Flechita apuntando arriba */
.settings-popover::before {
  content: '';
  position: absolute;
  top: -8px;
  right: 22px;
  width: 14px;
  height: 14px;
  background-color: var(--popover-bg);
  transform: rotate(45deg);
  border-top: 1px solid var(--input-border);
  border-left: 1px solid var(--input-border);
}

.settings-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-dark);
}

.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.95rem;
  font-weight: 600;
}

/* Control manual de número (+ / - / input) */
.number-control {
  display: flex;
  align-items: center;
  gap: 4px;
}

.number-control button {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  border: 1px solid var(--input-border);
  background-color: transparent;
  color: var(--text-dark);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease;
}

.number-control button:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.number-control input[type="number"] {
  width: 44px;
  height: 30px;
  border-radius: 10px;
  border: 1px solid var(--input-border);
  background-color: transparent;
  text-align: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-dark);
  -moz-appearance: textfield;
}

.number-control input::-webkit-outer-spin-button,
.number-control input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Desplegables Select */
.settings-select, .custom-select {
  padding: 5px 12px;
  border-radius: 12px;
  border: 1px solid var(--input-border);
  background-color: var(--popover-bg);
  font-weight: 600;
  color: var(--text-dark);
  outline: none;
  cursor: pointer;
  font-size: 0.9rem;
}

/* Switch Toggle (Interruptor) */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--input-border);
  transition: .25s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: #ffffff;
  transition: .25s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--btn-dark);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

/* =========================================
   POPOVER / MODAL DE EDITAR TAREA
   ========================================= */

.task-popover, .task-modal-content {
  position: absolute;
  top: 45px;
  right: 10px;
  z-index: 1000;
  width: 280px;
  background: var(--popover-bg);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--input-border);
  color: var(--text-dark);
}

.task-popover::before {
  content: "";
  position: absolute;
  top: -8px;
  right: 25px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--popover-bg);
}

.task-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.task-modal-header h3 {
  margin: 0;
  color: var(--text-dark);
  font-size: 1.1rem;
  font-weight: 800;
}

.btn-icon-close {
  background: transparent;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-dark);
}

.form-group {
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-group.row-align {
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.form-group label {
  font-weight: 700;
  color: var(--text-dark);
  font-size: 0.85rem;
}

.form-group input[type="text"] {
  border: 1px solid var(--input-border);
  border-radius: 12px;
  padding: 8px 12px;
  background-color: var(--task-item-bg);
  color: var(--text-dark);
  font-weight: 600;
  outline: none;
}

.task-modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 15px;
}

.btn-primary {
  flex: 1;
  background-color: var(--btn-dark);
  color: white;
  border: none;
  padding: 8px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}

.btn-secondary {
  flex: 1;
  background-color: var(--input-border);
  color: white;
  border: none;
  padding: 8px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}

.btn-danger {
  flex: 1;
  background-color: #c94a4a;
  color: white;
  border: none;
  padding: 8px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}