/* ================================================
   COMPONENTS.CSS - Reusable UI Components
   Livro&Livro - Book Exchange Platform
   ================================================ */

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-gray-light);
}

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

.btn-accent:hover:not(:disabled) {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: var(--color-white);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

.btn-block {
  width: 100%;
}

/* Button Efects */
.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-hover-shadow:hover:not(:disabled) {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-hover-shadow:active:not(:disabled) {
  transform: scale(0.98);
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-dark);
}

.form-label-required::after {
  content: " *";
  color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-gray-dark);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-medium);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--color-gray-light);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-help {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-gray-medium);
}

.form-error {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

.form-input-error,
.form-select-error,
.form-textarea-error {
  border-color: var(--color-error);
}

.form-input-error:focus,
.form-select-error:focus,
.form-textarea-error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Checkbox and Radio */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.form-check-input {
  margin-top: 0.25rem;
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  cursor: pointer;
}

.form-check-label {
  cursor: pointer;
  font-size: var(--font-size-base);
  color: var(--color-gray-dark);
}

/* ===== CARDS ===== */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-gray-light);
  border-bottom: 1px solid var(--color-gray-light);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-gray-light);
  border-top: 1px solid var(--color-gray-light);
}

/* Book Card */
.book-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.book-card-image {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  background-color: var(--color-gray-light);
}

.book-card-content {
  flex: 1;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
}

.book-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.book-card-author {
  font-size: var(--font-size-sm);
  color: var(--color-gray-medium);
  margin-bottom: var(--space-3);
}

.book-card-condition {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background-color: var(--color-gray-light);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.book-card-actions {
  margin-top: auto;
  padding-top: var(--space-4);
}

/* ===== ALERTS ===== */
.alert {
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
}

.alert-success {
  color: #065F46;
  background-color: #D1FAE5;
  border-color: #10B981;
}

.alert-error {
  color: #991B1B;
  background-color: #FEE2E2;
  border-color: #EF4444;
}

.alert-warning {
  color: #92400E;
  background-color: #FEF3C7;
  border-color: #F59E0B;
}

.alert-info {
  color: #1E40AF;
  background-color: #DBEAFE;
  border-color: #3B82F6;
}

/* ===== BADGES ===== */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--radius-full);
}

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

.badge-accent {
  color: var(--color-white);
  background-color: var(--color-accent);
}

.badge-success {
  color: var(--color-white);
  background-color: var(--color-success);
}

.badge-warning {
  color: #78350F;
  background-color: var(--color-warning);
}

.badge-error {
  color: var(--color-white);
  background-color: var(--color-error);
}

/* ===== BREADCRUMBS ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--font-size-sm);
  color: var(--color-gray-medium);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb-item:not(:last-child)::after {
  content: "/";
  color: var(--color-gray-medium);
}

.breadcrumb-item a {
  color: var(--color-primary);
}

.breadcrumb-item a:hover {
  color: var(--color-accent);
}

.breadcrumb-item.active {
  color: var(--color-gray-dark);
}

/* ===== LOADING SPINNER ===== */
.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 3px solid var(--color-gray-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spinner-rotate 0.6s linear infinite;
}

@keyframes spinner-rotate {
  to {
    transform: rotate(360deg);
  }
}

.spinner-lg {
  width: 3rem;
  height: 3rem;
  border-width: 4px;
}

.spinner-sm {
  width: 1rem;
  height: 1rem;
  border-width: 2px;
}

/* ===== MODAL ===== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal {
  position: relative;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-gray-light);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-gray-medium);
  cursor: pointer;
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-gray-light);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  padding: var(--space-6);
  border-top: 1px solid var(--color-gray-light);
}

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  justify-content: center;
  padding: var(--space-6) 0;
}

.pagination-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination-item:hover:not(.active):not(:disabled) {
  background-color: var(--color-gray-light);
  border-color: var(--color-primary);
}

.pagination-item.active {
  color: var(--color-white);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.pagination-item:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== TABS ===== */
.tabs {
  display: flex;
  gap: var(--space-2);
  border-bottom: 2px solid var(--color-gray-light);
  margin-bottom: var(--space-6);
}

.tab {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-medium);
  background-color: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: -2px;
}

.tab:hover {
  color: var(--color-primary);
}

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}