/* ============================================
   TAREAS — tasks.css
   Sistema de gestión de tareas académicas
   Diseño: card-based, mobile-first, orgánico
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── Variables ─────────────────────────────── */
:root {
  --tk-green:        #2e7d32;
  --tk-green-soft:   #388e3c;
  --tk-green-light:  #e8f5e9;
  --tk-green-glow:   rgba(46,125,50,0.15);

  --tk-p1-bg:        #fff1f0;
  --tk-p1-border:    #ef5350;
  --tk-p1-text:      #c62828;
  --tk-p1-dot:       #ef5350;

  --tk-p2-bg:        #fff8e1;
  --tk-p2-border:    #ffa000;
  --tk-p2-text:      #e65100;
  --tk-p2-dot:       #ffa000;

  --tk-p3-bg:        #e3f2fd;
  --tk-p3-border:    #1976d2;
  --tk-p3-text:      #0d47a1;
  --tk-p3-dot:       #1976d2;

  --tk-p4-bg:        #f3e5f5;
  --tk-p4-border:    #7b1fa2;
  --tk-p4-text:      #4a148c;
  --tk-p4-dot:       #7b1fa2;

  --tk-radius:       14px;
  --tk-radius-sm:    8px;
  --tk-shadow:       0 2px 12px rgba(0,0,0,0.08);
  --tk-shadow-hover: 0 8px 28px rgba(0,0,0,0.14);
  --tk-transition:   all 0.22s cubic-bezier(0.34, 1.2, 0.64, 1);

  --tk-font:         'Sora', 'Segoe UI', sans-serif;
  --tk-mono:         'JetBrains Mono', monospace;
}

[data-theme="dark"] {
  --tk-green-light:  rgba(46,125,50,0.12);
  --tk-green-glow:   rgba(46,125,50,0.25);

  --tk-p1-bg:        rgba(239,83,80,0.1);
  --tk-p1-border:    #ef5350;
  --tk-p1-text:      #ef9a9a;

  --tk-p2-bg:        rgba(255,160,0,0.1);
  --tk-p2-border:    #ffa000;
  --tk-p2-text:      #ffcc80;

  --tk-p3-bg:        rgba(25,118,210,0.12);
  --tk-p3-border:    #1976d2;
  --tk-p3-text:      #90caf9;

  --tk-p4-bg:        rgba(123,31,162,0.12);
  --tk-p4-border:    #7b1fa2;
  --tk-p4-text:      #ce93d8;
}

/* ── Header de la vista ─────────────────────── */
#tasksView .header-bar {
  margin-bottom: 0;
  border-bottom: none;
  border-radius: var(--tk-radius) var(--tk-radius) 0 0;
}

/* ── Contenedor raíz ────────────────────────── */
#tasksRoot {
  font-family: var(--tk-font);
  max-width: 100%;
}

/* ── Barra de filtros + acción ──────────────── */
.tk-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0 18px;
  flex-wrap: wrap;
}

.tk-topbar-left {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}

.tk-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  border-radius: 99px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--tk-transition);
  white-space: nowrap;
  font-family: var(--tk-font);
}

.tk-filter-chip:hover {
  border-color: var(--tk-green);
  color: var(--tk-green);
  transform: translateY(-1px);
}

.tk-filter-chip.active {
  background: var(--tk-green);
  border-color: var(--tk-green);
  color: white;
  box-shadow: 0 3px 10px rgba(46,125,50,0.3);
}

.tk-filter-chip .tk-chip-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.8;
}

.tk-add-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--tk-green), var(--tk-green-soft));
  color: white;
  border: none;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--tk-font);
  transition: var(--tk-transition);
  box-shadow: 0 4px 14px rgba(46,125,50,0.35);
  white-space: nowrap;
  flex-shrink: 0;
}

.tk-add-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46,125,50,0.45);
}

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

/* ── Panel por materia ──────────────────────── */
.tk-subject-group {
  margin-bottom: 20px;
  border-radius: var(--tk-radius);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--tk-shadow);
  overflow: hidden;
  transition: var(--tk-transition);
}

.tk-subject-group:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.tk-subject-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-secondary);
  cursor: pointer;
  user-select: none;
  gap: 10px;
  transition: background 0.15s;
}

.tk-subject-header:hover {
  background: var(--tk-green-light);
}

.tk-subject-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 9px;
}

.tk-subject-sem {
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-weight: 500;
  background: var(--bg-primary);
  padding: 2px 8px;
  border-radius: 99px;
  border: 1px solid var(--border-color);
}

.tk-subject-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tk-task-count {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 99px;
  background: var(--tk-green-light);
  color: var(--tk-green);
}

.tk-task-count.has-urgent {
  background: var(--tk-p1-bg);
  color: var(--tk-p1-text);
  animation: tk-pulse-count 2s infinite;
}

@keyframes tk-pulse-count {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.7; }
}

.tk-subject-chevron {
  font-size: 0.75rem;
  color: var(--text-secondary);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.tk-subject-chevron.open {
  transform: rotate(90deg);
}

/* ── Lista de tareas ────────────────────────── */
.tk-task-list {
  display: none;
  flex-direction: column;
  gap: 0;
  padding: 6px 10px 10px;
}

.tk-task-list.open {
  display: flex;
}

/* ── Tarjeta de tarea ───────────────────────── */
.tk-task-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 10px;
  border-radius: var(--tk-radius-sm);
  margin-bottom: 4px;
  transition: var(--tk-transition);
  position: relative;
  cursor: default;
  border: 1.5px solid transparent;
}

.tk-task-card:hover {
  background: var(--bg-secondary);
  border-color: var(--border-color);
  transform: translateX(2px);
}

.tk-task-card.done {
  opacity: 0.5;
}

.tk-task-card.done .tk-task-title {
  text-decoration: line-through;
  color: var(--text-secondary);
}

/* Acento de prioridad: borde izquierdo */
.tk-task-card[data-priority="1"] { border-left: 3px solid var(--tk-p1-dot) !important; }
.tk-task-card[data-priority="2"] { border-left: 3px solid var(--tk-p2-dot) !important; }
.tk-task-card[data-priority="3"] { border-left: 3px solid var(--tk-p3-dot) !important; }
.tk-task-card[data-priority="4"] { border-left: 3px solid var(--tk-p4-dot) !important; }

/* ── Checkbox custom ────────────────────────── */
.tk-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  flex-shrink: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--tk-transition);
  margin-top: 1px;
  background: var(--bg-primary);
}

.tk-check:hover {
  border-color: var(--tk-green);
  background: var(--tk-green-light);
  transform: scale(1.12);
}

.tk-task-card[data-priority="1"] .tk-check { border-color: var(--tk-p1-border); }
.tk-task-card[data-priority="2"] .tk-check { border-color: var(--tk-p2-border); }
.tk-task-card[data-priority="3"] .tk-check { border-color: var(--tk-p3-border); }
.tk-task-card[data-priority="4"] .tk-check { border-color: var(--tk-p4-border); }

.tk-check.checked {
  background: var(--tk-green);
  border-color: var(--tk-green);
  box-shadow: 0 0 0 3px var(--tk-green-glow);
}

.tk-check.checked::after {
  content: '✓';
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Animación de check */
.tk-check.checking {
  animation: tk-check-pop 0.35s cubic-bezier(0.34,1.7,0.64,1) forwards;
}

@keyframes tk-check-pop {
  0%   { transform: scale(0.85); }
  60%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}

/* ── Contenido de la tarea ──────────────────── */
.tk-task-body {
  flex: 1;
  min-width: 0;
}

.tk-task-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 4px;
  word-break: break-word;
}

.tk-task-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.tk-priority-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  font-family: var(--tk-font);
}

.tk-priority-badge[data-priority="1"] {
  background: var(--tk-p1-bg);
  color: var(--tk-p1-text);
  border: 1px solid var(--tk-p1-border);
}
.tk-priority-badge[data-priority="2"] {
  background: var(--tk-p2-bg);
  color: var(--tk-p2-text);
  border: 1px solid var(--tk-p2-border);
}
.tk-priority-badge[data-priority="3"] {
  background: var(--tk-p3-bg);
  color: var(--tk-p3-text);
  border: 1px solid var(--tk-p3-border);
}
.tk-priority-badge[data-priority="4"] {
  background: var(--tk-p4-bg);
  color: var(--tk-p4-text);
  border: 1px solid var(--tk-p4-border);
}

.tk-due-badge {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-family: var(--tk-mono);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.tk-due-badge.overdue {
  color: var(--tk-p1-text);
  font-weight: 700;
}

.tk-due-badge.today {
  color: var(--tk-p2-text);
  font-weight: 700;
}

.tk-due-badge.soon {
  color: var(--tk-p3-text);
}

.tk-task-desc {
  font-size: 0.76rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 4px;
}

/* ── Acciones de tarea ──────────────────────── */
.tk-task-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.18s;
}

.tk-task-card:hover .tk-task-actions {
  opacity: 1;
}

/* En móvil siempre visibles */
@media (max-width: 768px) {
  .tk-task-actions {
    opacity: 1;
  }
}

.tk-icon-btn {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: var(--tk-transition);
}

.tk-icon-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  transform: scale(1.1);
}

.tk-icon-btn.delete:hover {
  background: var(--tk-p1-bg);
  color: var(--tk-p1-text);
}

/* ── Estado vacío ───────────────────────────── */
.tk-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-secondary);
}

.tk-empty-icon {
  font-size: 3.2rem;
  margin-bottom: 12px;
  display: block;
  opacity: 0.6;
}

.tk-empty h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  font-family: var(--tk-font);
}

.tk-empty p {
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ── Sección "Completadas" ──────────────────── */
.tk-done-section {
  margin-top: 24px;
}

.tk-done-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--tk-radius-sm);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  width: 100%;
  font-family: var(--tk-font);
  transition: var(--tk-transition);
}

.tk-done-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-primary);
}

.tk-done-list {
  display: none;
  margin-top: 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--tk-radius);
  overflow: hidden;
}

.tk-done-list.open {
  display: block;
  padding: 6px 10px 10px;
}

/* ── MODAL NUEVA TAREA ──────────────────────── */
#tkModal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 10000;
  backdrop-filter: blur(6px);
  align-items: flex-end;
  justify-content: center;
  padding: 0;
}

#tkModal.open {
  display: flex;
  animation: tk-backdrop-in 0.25s ease;
}

@keyframes tk-backdrop-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.tk-modal-sheet {
  background: var(--bg-primary);
  border-radius: 24px 24px 0 0;
  width: 100%;
  max-width: 620px;
  max-height: 95dvh;
  overflow-y: auto;
  padding: 24px 20px 32px;
  box-shadow: 0 -12px 48px rgba(0,0,0,0.22);
  animation: tk-sheet-up 0.35s cubic-bezier(0.34, 1.3, 0.64, 1);
  font-family: var(--tk-font);
  -webkit-overflow-scrolling: touch;
}

@keyframes tk-sheet-up {
  from { transform: translateY(60px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* Pill handle */
.tk-modal-handle {
  width: 44px;
  height: 5px;
  background: var(--border-color);
  border-radius: 99px;
  margin: 0 auto 20px;
}

.tk-modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--unal-green);
  margin-bottom: 20px;
  text-align: center;
  font-family: var(--tk-font);
}

.tk-form-group {
  margin-bottom: 16px;
}

.tk-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 7px;
  font-family: var(--tk-font);
}

.tk-input,
.tk-select,
.tk-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--tk-radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--tk-font);
  transition: border-color 0.18s, box-shadow 0.18s;
  -webkit-appearance: none;
  appearance: none;
}

.tk-input:focus,
.tk-select:focus,
.tk-textarea:focus {
  outline: none;
  border-color: var(--unal-green);
  box-shadow: 0 0 0 3px rgba(46,125,50,0.15);
  background: var(--bg-primary);
}

.tk-textarea {
  resize: vertical;
  min-height: 72px;
}

/* ── Selector de prioridad ──────────────────── */
.tk-priority-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.tk-prio-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px;
  border-radius: var(--tk-radius-sm);
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: var(--tk-transition);
  font-family: var(--tk-font);
  background: var(--bg-secondary);
}

.tk-prio-option:hover {
  transform: translateY(-2px);
}

.tk-prio-option.selected-prio {
  box-shadow: 0 4px 14px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}

.tk-prio-option[data-value="1"].selected-prio {
  background: var(--tk-p1-bg);
  border-color: var(--tk-p1-border);
}
.tk-prio-option[data-value="2"].selected-prio {
  background: var(--tk-p2-bg);
  border-color: var(--tk-p2-border);
}
.tk-prio-option[data-value="3"].selected-prio {
  background: var(--tk-p3-bg);
  border-color: var(--tk-p3-border);
}
.tk-prio-option[data-value="4"].selected-prio {
  background: var(--tk-p4-bg);
  border-color: var(--tk-p4-border);
}

.tk-prio-icon  { font-size: 1.4rem; }
.tk-prio-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
  line-height: 1.2;
}

.tk-prio-option[data-value="1"] .tk-prio-label { color: var(--tk-p1-text); }
.tk-prio-option[data-value="2"] .tk-prio-label { color: var(--tk-p2-text); }
.tk-prio-option[data-value="3"] .tk-prio-label { color: var(--tk-p3-text); }
.tk-prio-option[data-value="4"] .tk-prio-label { color: var(--tk-p4-text); }

/* ── Botones del modal ──────────────────────── */
.tk-modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.tk-btn-save {
  flex: 1;
  padding: 13px;
  background: linear-gradient(135deg, var(--tk-green), var(--tk-green-soft));
  color: white;
  border: none;
  border-radius: var(--tk-radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--tk-font);
  transition: var(--tk-transition);
  box-shadow: 0 4px 14px rgba(46,125,50,0.35);
}

.tk-btn-save:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(46,125,50,0.4);
}

.tk-btn-cancel {
  padding: 13px 20px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--tk-radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--tk-font);
  transition: var(--tk-transition);
}

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

/* ── Banner de resumen ──────────────────────── */
.tk-summary-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.tk-summary-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 99px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--tk-shadow);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--tk-font);
  color: var(--text-secondary);
}

.tk-summary-pill strong {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
}

.tk-summary-pill.urgent strong { color: var(--tk-p1-text); }
.tk-summary-pill.today strong  { color: var(--tk-p2-text); }

/* ── Animación de aparición ─────────────────── */
.tk-task-card {
  animation: tk-card-in 0.28s cubic-bezier(0.34, 1.2, 0.64, 1) both;
}

@keyframes tk-card-in {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0); }
}

.tk-task-card.vanishing {
  animation: tk-card-out 0.3s ease forwards;
}

@keyframes tk-card-out {
  to { opacity: 0; transform: translateX(20px) scale(0.95); max-height: 0; padding: 0; margin: 0; }
}

/* ── Toast de confirmación ─────────────────── */
.tk-toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: #1a1a1a;
  color: white;
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--tk-font);
  z-index: 20000;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.34, 1.2, 0.64, 1);
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
}

.tk-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Sort bar ────────────────────────────────── */
.tk-sort-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.tk-sort-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--tk-font);
}

.tk-sort-chip {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 99px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--tk-font);
  transition: var(--tk-transition);
}

.tk-sort-chip.active {
  background: var(--bg-secondary);
  border-color: var(--unal-green);
  color: var(--unal-green);
}

.tk-sort-chip:hover {
  border-color: var(--unal-green);
  color: var(--unal-green);
}

/* ── Responsive ─────────────────────────────── */
@media (max-width: 768px) {
  .tk-priority-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .tk-prio-option {
    flex-direction: row;
    padding: 12px 14px;
    gap: 10px;
  }

  .tk-prio-icon { font-size: 1.2rem; }

  .tk-summary-bar {
    gap: 8px;
  }

  .tk-summary-pill {
    flex: 1;
    min-width: calc(50% - 4px);
    justify-content: center;
  }

  .tk-task-card {
    padding: 11px 8px;
  }

  .tk-modal-sheet {
    border-radius: 20px 20px 0 0;
    padding: 20px 16px 28px;
  }

  .tk-add-btn {
    flex: 1;
    justify-content: center;
  }

  .tk-topbar {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .tk-summary-pill {
    min-width: 100%;
  }

  .tk-priority-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  #tkGroupsContainer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 20px;
    align-items: start;
  }
}