/* ============================================================
   3-components / button.css
   按钮组件：所有 .btn-* 变体
   来源：website-complete / styles.css L566–583 + L1869–1894（最终版）
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    min-height: 36px;
}

.btn svg { width: 16px; height: 16px; }

.btn-primary { background: var(--color-primary); color: white; border: none; }
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-outline { background: transparent; border: 1px solid var(--border-default); color: var(--text-primary); }
.btn-outline:hover { background: var(--bg-hover); }

.btn-danger { background: #EF4444; color: white; border: none; }
.btn-danger:hover { background: #DC2626; }

.btn-sm { padding: 6px 12px; min-height: 32px; font-size: 12px; }

.btn-block { width: 100%; justify-content: center; }