/* Component styles for blog application
 * 
 * This file provides reusable UI components like buttons,
 * cards, forms, inputs, and other interactive elements.
 * All components use CSS variables from theme files.
 */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  border: 1px solid var(--color-secondary-dark-1);
  border-radius: 4px;
  background-color: var(--color-button);
  color: var(--color-text);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.btn:hover {
  background-color: var(--color-hover);
  border-color: var(--color-secondary-dark-2);
  text-decoration: none;
}

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

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-alpha-30);
}

.btn:disabled,
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary-dark-1);
  color: var(--color-primary-contrast);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-dark-2);
}

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

.btn-danger {
  background-color: var(--color-red);
  border-color: var(--color-red-dark-1);
  color: #ffffff;
}

.btn-danger:hover {
  background-color: var(--color-red-dark-1);
}

.btn-success {
  background-color: var(--color-green);
  border-color: var(--color-green-dark-1);
  color: #ffffff;
}

.btn-success:hover {
  background-color: var(--color-green-dark-1);
}

.btn-ghost {
  background-color: transparent;
  border-color: transparent;
}

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

.btn-sm {
  padding: 0.25rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

/* Cards */
.card {
  background-color: var(--color-box-body);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: 0 2px 8px var(--color-shadow);
}

.card-header {
  background-color: var(--color-box-header);
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
}

.card-body {
  padding: 1.25rem;
}

.card-footer {
  background-color: var(--color-box-header);
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--color-border);
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--color-text);
}

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

.form-hint {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-light-3);
}

/* Inputs */
.input,
.textarea,
.select {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-input-text);
  background-color: var(--color-input-background);
  border: 1px solid var(--color-input-border);
  border-radius: 4px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha-20);
}

.input:disabled,
.textarea:disabled,
.select:disabled {
  background-color: var(--color-secondary-light-2);
  cursor: not-allowed;
}

.input::placeholder,
.textarea::placeholder {
  color: var(--color-placeholder-text);
}

.textarea {
  min-height: 100px;
  resize: vertical;
}

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

/* Input sizes */
.input-sm,
.textarea-sm,
.select-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.8125rem;
}

.input-lg,
.textarea-lg,
.select-lg {
  padding: 0.75rem 1rem;
  font-size: 1rem;
}

/* Alerts */
.alert {
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  border-radius: 4px;
}

.alert-error {
  background-color: var(--color-error-bg);
  border-color: var(--color-error-border);
  color: var(--color-error-text);
}

.alert-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: var(--color-success-text);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: var(--color-warning-text);
}

.alert-info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info-border);
  color: var(--color-info-text);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
  border-radius: 9999px;
  background-color: var(--color-label-bg);
  color: var(--color-label-text);
}

.badge-primary {
  background-color: var(--color-primary-alpha-20);
  color: var(--color-primary);
}

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

.badge-danger {
  background-color: var(--color-red-badge-bg);
  color: var(--color-red-badge);
}

.badge-warning {
  background-color: var(--color-yellow-badge-bg);
  color: var(--color-yellow-badge);
}

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  background-color: var(--color-secondary-light-3);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-light);
}

.tag:hover {
  background-color: var(--color-hover);
}

/* Avatar */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  font-weight: 500;
  font-size: 0.875rem;
}

.avatar-sm {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.75rem;
}

.avatar-lg {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1rem;
}

/* Dividers */
.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: 1.5rem 0;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-light-3);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}