.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn:hover {
  text-decoration: none;
}

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

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

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

.btn--outline:hover {
  background: var(--color-black);
  color: var(--color-white);
}

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

.btn--sm {
  min-height: 32px;
  padding: 8px 12px;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.user-avatar {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-black);
  overflow: hidden;
  flex-shrink: 0;
}

.user-avatar--md {
  width: 40px;
  height: 40px;
}

.user-avatar--clickable {
  cursor: pointer;
  transition: opacity 0.15s;
}

.user-avatar--clickable:hover {
  opacity: 0.85;
}

.user-avatar__icon {
  width: 16px;
  height: 16px;
}

.user-avatar__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-xl);
  text-align: center;
}

.section {
  padding: var(--space-3xl) 0;
}

.section--muted {
  background: var(--color-bg-muted);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.form-field label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.form-field input,
.form-field textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font: inherit;
}

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

.site-messages {
  padding: var(--space-md) 0 0;
}

.site-message {
  margin: 0 0 var(--space-sm);
  padding: 12px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-muted);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  text-align: center;
}

.site-message--error {
  border-color: #991b1b;
  background: #fee2e2;
  color: #991b1b;
}

.site-message--warning {
  border-color: var(--color-border);
  background: var(--color-bg-soft);
}