.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-button);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1;
}

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

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

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

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-text-black);
  border: 1px solid var(--color-stroke);
}

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

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

.btn--sm {
  padding: 8px 16px;
  font-size: var(--font-size-small);
}

.btn--md {
  padding: 12px 24px;
}

.btn--lg {
  padding: 16px 32px;
}

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

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  color: var(--color-text-black);
  background: var(--color-bg-gray);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input::placeholder {
  color: var(--color-text-gray);
}

.form-input:focus {
  border-color: var(--color-primary);
  background: var(--color-white);
}

.form-input--error {
  border-color: var(--color-red);
  background: var(--color-bg-error);
}

.form-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-black);
  margin-bottom: 6px;
}

.form-error {
  font-family: var(--font-body);
  font-size: var(--font-size-caption);
  color: var(--color-red);
  margin-top: 4px;
}

.form-select {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  color: var(--color-text-black);
  background: var(--color-bg-gray) url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23333333' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 16px center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  outline: none;
  appearance: none;
  transition: all var(--transition-fast);
}

.form-select:focus {
  border-color: var(--color-primary);
  background-color: var(--color-white);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

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

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-family: var(--font-body);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background: var(--color-light-green);
  border-radius: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-white);
  background: var(--color-red);
  border-radius: 10px;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
  background: var(--color-bg-gray);
}

.avatar--sm {
  width: 32px;
  height: 32px;
}

.avatar--lg {
  width: 64px;
  height: 64px;
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-gray) 25%, #e8e8e8 50%, var(--color-bg-gray) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.section {
  padding: 60px 0;
}

@media (max-width: 744px) {
  .section {
    padding: 32px 0;
  }
}