/* === CSS Variables === */
:root {
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-primary-light: #e8f0fe;
  --color-success: #0d9488;
  --color-danger: #dc2626;
  --color-warning: #f59e0b;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.2s ease;
}

/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

input, textarea, button, select {
  font-family: inherit;
  font-size: inherit;
}

/* === Header === */
.header {
  background: var(--color-primary);
  color: white;
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px var(--color-shadow);
}

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

/* === Navigation Tabs === */
.nav-tabs {
  display: flex;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 56px;
  z-index: 90;
}

.nav-tabs__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  border: none;
  background: none;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  border-bottom: 3px solid transparent;
}

.nav-tabs__btn i {
  font-size: 1.25rem;
}

.nav-tabs__btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* === Panels === */
.panel {
  display: none;
  padding: 16px;
  padding-bottom: 80px;
}

.panel.active {
  display: block;
}

.panel__toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.panel__subtitle {
  font-size: 1rem;
  font-weight: 600;
  flex: 1;
}

/* === Search Box === */
.search-box {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  gap: 8px;
}

.search-box i {
  color: var(--color-text-secondary);
}

.search-box input {
  border: none;
  outline: none;
  width: 100%;
  background: none;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
}

.btn--danger {
  background: var(--color-danger);
  color: white;
}

.btn--ghost {
  background: none;
  color: var(--color-text-secondary);
}

.btn--ghost:hover {
  background: var(--color-bg);
}

.btn--icon {
  padding: 10px;
  border-radius: 50%;
}

.btn--sm {
  padding: 6px 10px;
  font-size: 0.8rem;
}

/* === Card List === */
.card-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 1px 4px var(--color-shadow);
  transition: box-shadow var(--transition);
}

.card:active {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.card__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.card__badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}

.card__badge--active {
  background: #dcfce7;
  color: #166534;
}

.card__badge--scheduled {
  background: #fef3c7;
  color: #92400e;
}

.card__info {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.card__info i {
  width: 16px;
  display: inline-block;
}

.card__actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-secondary);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 0.9rem;
}

/* === Modal === */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal.hidden {
  display: none;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.modal__content {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
  animation: slideUp 0.3s ease;
}

.modal__content--large {
  max-height: 95vh;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal__header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

/* === Form === */
.form__group {
  margin-bottom: 16px;
}

.form__group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.form__group input,
.form__group textarea,
.form__group select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition);
  background: var(--color-bg);
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--color-primary);
}

.form__group textarea {
  resize: vertical;
  min-height: 80px;
}

.form__actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* === Radio & Checkbox Groups === */
.radio-group {
  display: flex;
  gap: 16px;
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  cursor: pointer;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip-check {
  cursor: pointer;
}

.chip-check input {
  display: none;
}

.chip-check span {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.chip-check input:checked + span {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* === Destinatarios === */
.destinatarios-list {
  max-height: 120px;
  overflow-y: auto;
  margin-bottom: 8px;
}

.destinatarios-list .dest-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  font-size: 0.8rem;
}

.destinatarios-add {
  display: flex;
  gap: 8px;
  align-items: center;
}

.destinatarios-add input {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

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

/* === Toast === */
.toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.85rem;
  font-weight: 500;
  animation: fadeInUp 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.toast--success { background: var(--color-success); }
.toast--error { background: var(--color-danger); }
.toast--info { background: var(--color-primary); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* === Responsive (tablet+) === */
@media (min-width: 768px) {
  .panel {
    max-width: 600px;
    margin: 0 auto;
  }

  .modal__content {
    border-radius: var(--radius);
    margin: auto;
  }

  .modal {
    align-items: center;
  }
}