/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.btn:active { transform: scale(0.97); }

.btn--primary { background: var(--color-accent); color: #000; }
.btn--primary:hover { background: var(--color-accent-border); }

.btn--secondary { background: var(--surface-2); color: var(--text-base); }

.btn--outline { background: transparent; border: 1px solid var(--dark-border-light); color: var(--text-base); }

.btn--danger { background: var(--color-negative); color: #fff; }

.btn--icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-circle);
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2);
}
.btn--icon svg { width: 20px; height: 20px; }

.btn--block { width: 100%; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface-1);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-medium);
}

/* ---------- Task item ---------- */
.task-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  background: var(--surface-1);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-2);
  box-shadow: var(--shadow-medium);
  transition: background var(--transition-fast);
}
.task-item:active { background: var(--surface-2); }

.task-item.completed .task-item__title { text-decoration: line-through; color: var(--text-secondary); }

.task-item__checkbox {
  width: 22px; height: 22px;
  border-radius: var(--radius-circle);
  border: 2px solid var(--dark-border-light);
  flex-shrink: 0;
  margin-top: 2px;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.task-item.completed .task-item__checkbox {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.task-item.completed .task-item__checkbox svg { display: block; }
.task-item__checkbox svg { display: none; width: 14px; height: 14px; color: #000; }

.task-item__body { flex: 1; min-width: 0; }
.task-item__title { font-size: 0.95rem; font-weight: 600; }
.task-item__meta {
  display: flex; align-items: center; gap: var(--space-2);
  margin-top: 4px; font-size: 0.75rem; color: var(--text-secondary);
}

.priority-dot {
  width: 8px; height: 8px; border-radius: var(--radius-circle); flex-shrink: 0;
}
.priority-dot--high { background: var(--priority-high); }
.priority-dot--medium { background: var(--priority-medium); }
.priority-dot--low { background: var(--priority-low); }

.task-item__due { display: flex; align-items: center; gap: 4px; }
.task-item__due.overdue { color: var(--color-negative); font-weight: 700; }

/* ---------- Inputs (modernized) ---------- */
.field { margin-bottom: var(--space-5); }

.field__label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  letter-spacing: 0.2px;
}
.field__label svg { width: 15px; height: 15px; opacity: 0.8; }

.field__input,
.field__textarea,
.field__select {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  border: 1.5px solid transparent;
  color: var(--text-base);
  font-size: 0.92rem;
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.field__input::placeholder,
.field__textarea::placeholder { color: var(--text-secondary); opacity: 0.7; }

.field__input:hover,
.field__textarea:hover,
.field__select:hover { background: var(--surface-2); border-color: var(--dark-border); }

.field__input:focus,
.field__textarea:focus,
.field__select:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--surface-1);
  box-shadow: 0 0 0 3px rgba(30, 215, 96, 0.16);
}

.field__textarea { min-height: 88px; resize: vertical; line-height: 1.5; }

/* Grid row for pairing two fields (e.g. date + time) */
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

/* Custom select with chevron, RTL-aware */
.select-wrapper { position: relative; }
.select-wrapper .field__select {
  appearance: none;
  -webkit-appearance: none;
  padding-left: 40px;
  cursor: pointer;
}
.select-wrapper::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}

/* Segmented control — used for priority selection */
.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}
.segmented__option {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 8px;
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  border: 1.5px solid transparent;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.segmented__option .priority-dot { width: 8px; height: 8px; }
.segmented__option.active {
  color: var(--text-base);
  background: var(--surface-1);
}
.segmented__option[data-priority="high"].active { border-color: var(--priority-high); box-shadow: 0 0 0 3px rgba(243, 114, 127, 0.14); }
.segmented__option[data-priority="medium"].active { border-color: var(--priority-medium); box-shadow: 0 0 0 3px rgba(255, 164, 43, 0.14); }
.segmented__option[data-priority="low"].active { border-color: var(--priority-low); box-shadow: 0 0 0 3px rgba(83, 157, 245, 0.14); }

/* Chip-style toggle group — used for repeat option */
.toggle-group { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.toggle-group__option {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: var(--surface-2);
  border: 1.5px solid transparent;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.toggle-group__option.active {
  background: var(--color-accent);
  color: #000;
  border-color: var(--color-accent);
}

.field__divider {
  height: 1px;
  background: var(--border);
  opacity: 0.5;
  margin: var(--space-5) 0;
}

.field__hint {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 6px;
  opacity: 0.8;
}

.quick-add {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--surface-1);
  border-radius: var(--radius-full);
  padding: 6px 8px 6px 6px;
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-medium);
  margin-bottom: var(--space-5);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.quick-add:hover { border-color: var(--dark-border-light); }
.quick-add:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(30, 215, 96, 0.16), var(--shadow-medium);
}

.quick-add__icon {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.quick-add__icon svg { width: 18px; height: 18px; }
.quick-add:focus-within .quick-add__icon { color: var(--color-accent); background: rgba(30, 215, 96, 0.12); }

.quick-add input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  padding: 10px 4px;
  color: var(--text-base);
  font-size: 0.92rem;
}
.quick-add input::placeholder { color: var(--text-secondary); opacity: 0.75; }
.quick-add input:focus { outline: none; }

.quick-add__submit {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  color: var(--text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.quick-add__submit svg { width: 18px; height: 18px; }
.quick-add:focus-within .quick-add__submit,
.quick-add input:not(:placeholder-shown) ~ .quick-add__submit {
  background: var(--color-accent);
  color: #000;
}
.quick-add__submit:active { transform: scale(0.92); }

/* ---------- Modal / Bottom sheet ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  z-index: 40; display: flex; align-items: flex-end;
  opacity: 0; pointer-events: none; transition: opacity var(--transition-base);
}
.overlay.active { opacity: 1; pointer-events: auto; }

.bottom-sheet {
  background: var(--surface-1);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: var(--space-6) var(--space-5) var(--space-8);
  box-shadow: var(--shadow-heavy);
  transform: translateY(100%);
  transition: transform var(--transition-base), opacity var(--transition-base);
  margin: 0 auto;
}
.overlay.active .bottom-sheet { transform: translateY(0); }

.bottom-sheet__handle {
  width: 40px; height: 4px; background: var(--dark-border-light);
  border-radius: var(--radius-full); margin: 0 auto var(--space-5);
  opacity: 0.6;
}

.bottom-sheet__header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}
.bottom-sheet__header h3 { font-size: 1.15rem; }

@media (min-width: 640px) {
  .overlay { align-items: center; justify-content: center; }
  .bottom-sheet {
    border-radius: var(--radius-xl);
    transform: translateY(20px) scale(0.98);
    opacity: 0;
  }
  .overlay.active .bottom-sheet { transform: translateY(0) scale(1); opacity: 1; }
}

/* ---------- List chips ---------- */
.chip-row { display: flex; gap: var(--space-2); overflow-x: auto; padding-bottom: var(--space-2); margin-bottom: var(--space-4); }
.chip {
  flex-shrink: 0;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--surface-2);
  font-size: 0.8rem; font-weight: 600;
  color: var(--text-secondary);
  display: flex; align-items: center; gap: 6px;
}
.chip.active { background: var(--color-accent); color: #000; }
.chip__dot { width: 8px; height: 8px; border-radius: 50%; }

/* ---------- Calendar (Jalali) ---------- */
.calendar-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-4);
}
.calendar-header__title { font-size: 1.1rem; font-weight: 700; }
.calendar-grid {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; text-align: center;
}
.calendar-grid__weekday { font-size: 0.7rem; color: var(--text-secondary); padding: 6px 0; font-weight: 700; }
.calendar-day {
  aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: var(--radius-md); font-size: 0.85rem; position: relative; cursor: pointer;
}
.calendar-day.today { border: 1px solid var(--color-accent); }
.calendar-day.selected { background: var(--color-accent); color: #000; font-weight: 700; }
.calendar-day.other-month { color: var(--dark-border); }
.calendar-day__dot { width: 4px; height: 4px; border-radius: 50%; background: var(--color-accent); position: absolute; bottom: 4px; }
.calendar-day.selected .calendar-day__dot { background: #000; }

/* ---------- Empty state ---------- */
.empty-state { text-align: center; padding: var(--space-8) var(--space-4); color: var(--text-secondary); }
.empty-state svg { width: 64px; height: 64px; margin-bottom: var(--space-3); opacity: 0.4; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: calc(var(--bottom-nav-height) + 12px); left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-2); color: var(--text-base);
  padding: 10px 20px; border-radius: var(--radius-full);
  box-shadow: var(--shadow-heavy); font-size: 0.85rem;
  opacity: 0; z-index: 50; transition: all var(--transition-base); pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Theme toggle switch ---------- */
.theme-toggle {
  width: 48px; height: 26px; border-radius: var(--radius-full);
  background: var(--surface-2); position: relative; flex-shrink: 0;
}
.theme-toggle__knob {
  position: absolute; top: 3px; right: 3px; width: 20px; height: 20px;
  border-radius: 50%; background: var(--color-accent); transition: transform var(--transition-fast);
}
[data-theme="light"] .theme-toggle__knob { transform: translateX(-22px); background: #ffa42b; }

/* ---------- About page ---------- */
.about-hero { text-align: center; padding: var(--space-6) var(--space-4); }
.about-avatar {
  width: 96px; height: 96px; border-radius: 50%; margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--color-accent), var(--color-announcement));
  display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: 700; color: #000;
}
.about-links { display: flex; justify-content: center; gap: var(--space-3); margin-top: var(--space-4); }
.about-section { margin-top: var(--space-6); }
.about-section h3 { margin-bottom: var(--space-2); font-size: 1rem; }
.tech-badges { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-2); }
.tech-badge {
  padding: 5px 12px; border-radius: var(--radius-full); background: var(--surface-2);
  font-size: 0.72rem; font-weight: 600; color: var(--text-secondary);
}


/* ---------- Date field trigger + popover picker (used in task form) ---------- */
.date-field { position: relative; }

.date-field__trigger {
  display: flex;
  align-items: center;
  text-align: right;
  cursor: pointer;
  color: var(--text-base);
}
.date-field__trigger:hover { border-color: var(--dark-border); }
.date-field__trigger:focus,
.date-field__trigger:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(30, 215, 96, 0.16);
}

.date-picker-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  left: 0;
  z-index: 60;
  width: 250px;
  background: var(--surface-1);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-heavy);
  border: 1px solid var(--border);
  animation: dpFadeIn var(--transition-fast);
}

@keyframes dpFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.date-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  font-size: 0.9rem;
  font-weight: 700;
}

.date-picker-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  text-align: center;
}

.date-picker-grid__weekday {
  font-size: 0.68rem;
  color: var(--text-secondary);
  font-weight: 700;
  padding: 4px 0;
}

.date-picker-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.date-picker-day:not(.is-empty):hover { background: var(--surface-2); }
.date-picker-day.today { border: 1px solid var(--color-accent); }
.date-picker-day.selected { background: var(--color-accent); color: #000; font-weight: 700; }
.date-picker-day.is-empty { cursor: default; }

.date-picker-footer {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.date-picker-footer .btn { flex: 1; padding: 8px 12px; font-size: 0.78rem; }