diff --git a/README.md b/README.md
index 171e0a5..1301f7a 100644
--- a/README.md
+++ b/README.md
@@ -6,16 +6,15 @@ Example:
 import { define } from "forge"
 
 export const Button = define("button", {
-  layout: {
-    padding: 20,
-  },
-  look: {
-    background: "blue",
-  },
+  base: "button",
+
+  padding: 20,
+  background: "blue",
+
   variants: {
     kind: {
-      danger: { look: { background: "red" } },
-      warning: { look: { background: "yellow" } },
+      danger: { background: "red" },
+      warning: { background: "yellow" },
     }
   },
 })
@@ -26,35 +25,31 @@ export const Button = define("button", {
 <Button kind="warning">Click me?</Button>
 
 export const Profile = define("div", {
-  layout: {
-    padding: 50,
-  },
-  look: {
-    background: "red",
-  },
+  padding: 50,
+  background: "red",
 
   parts: {
-    header: { layout: { display: "flex" } },
-    avatar: { layout: { width: 50 } },
-    bio: { look: { color: "gray" } },
+    Header: { display: "flex" },
+    Avatar: { base: 'img', width: 50 },
+    Bio: { color: "gray" },
   },
 
   variants: {
     size: {
       small: {
-        parts: { avatar: { layout: { width: 20 }}}
+        parts: { Avatar: { width: 20 }}
       }
     }
   },
 
-  render({ props, parts: { root, header, avatar, bio } }) {
+  render({ props, parts: { Root, Header, Avatar, Bio } }) {
     return (
-      <root>
-        <header>
-          <avatar src={props.pic} />
-          <bio>{props.bio}</bio>
-        </header>
-      </root>
+      <Root>
+        <Header>
+          <Avatar src={props.pic} />
+          <Bio>{props.bio}</Bio>
+        </Header>
+      </Root>
     )
   },
 })
diff --git a/examples/button.tsx b/examples/button.tsx
index 12e2b3b..f51e4ef 100644
--- a/examples/button.tsx
+++ b/examples/button.tsx
@@ -4,109 +4,80 @@ import { Layout, ExampleSection } from './helpers'
 const Button = define('Button', {
   base: 'button',
 
-  layout: {
-    padding: "12px 24px",
-    display: "inline-flex",
-    alignItems: "center",
-    justifyContent: "center",
-    gap: 8,
-  },
-
-  look: {
-    background: "#3b82f6",
-    color: "white",
-    border: "none",
-    borderRadius: 8,
-    fontSize: 16,
-    fontWeight: 600,
-    cursor: "pointer",
-    transition: "all 0.2s ease",
-    userSelect: "none",
-    boxShadow: "0 4px 6px rgba(59, 130, 246, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1)",
-    transform: "translateY(0)",
-  },
+  padding: "12px 24px",
+  display: "inline-flex",
+  alignItems: "center",
+  justifyContent: "center",
+  gap: 8,
+  background: "#3b82f6",
+  color: "white",
+  border: "none",
+  borderRadius: 8,
+  fontSize: 16,
+  fontWeight: 600,
+  cursor: "pointer",
+  transition: "all 0.2s ease",
+  userSelect: "none",
+  boxShadow: "0 4px 6px rgba(59, 130, 246, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1)",
+  transform: "translateY(0)",
 
   states: {
     ":not(:disabled):hover": {
-      look: {
-        transform: 'translateY(-2px) !important',
-        filter: 'brightness(1.05)'
-      }
+      transform: 'translateY(-2px) !important',
+      filter: 'brightness(1.05)'
     },
     ":not(:disabled):active": {
-      look: {
-        transform: 'translateY(1px) !important',
-        boxShadow: '0 2px 3px rgba(0, 0, 0, 0.2) !important'
-      }
+      transform: 'translateY(1px) !important',
+      boxShadow: '0 2px 3px rgba(0, 0, 0, 0.2) !important'
     },
   },
 
   variants: {
     intent: {
       primary: {
-        look: {
-          background: "#3b82f6",
-          color: "white",
-          boxShadow: "0 4px 6px rgba(59, 130, 246, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1)",
-        },
+        background: "#3b82f6",
+        color: "white",
+        boxShadow: "0 4px 6px rgba(59, 130, 246, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1)",
       },
       secondary: {
-        look: {
-          background: "#f3f4f6",
-          color: "#374151",
-          boxShadow: "0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06)",
-        },
+        background: "#f3f4f6",
+        color: "#374151",
+        boxShadow: "0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06)",
       },
       danger: {
-        look: {
-          background: "#ef4444",
-          color: "white",
-          boxShadow: "0 4px 6px rgba(239, 68, 68, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1)",
-        },
+        background: "#ef4444",
+        color: "white",
+        boxShadow: "0 4px 6px rgba(239, 68, 68, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1)",
       },
       ghost: {
-        look: {
-          background: "transparent",
-          color: "#aaa",
-          boxShadow: "0 4px 6px rgba(0, 0, 0, 0.2), 0 2px 4px rgba(0, 0, 0, 0.1)",
-          border: "1px solid #eee",
-        },
+        background: "transparent",
+        color: "#aaa",
+        boxShadow: "0 4px 6px rgba(0, 0, 0, 0.2), 0 2px 4px rgba(0, 0, 0, 0.1)",
+        border: "1px solid #eee",
       },
     },
     size: {
       small: {
-        layout: {
-          padding: "8px 16px",
-        },
-        look: {
-          fontSize: 14,
-        },
+        padding: "8px 16px",
+        fontSize: 14,
       },
       large: {
-        layout: {
-          padding: "16px 32px",
-        },
-        look: {
-          fontSize: 18,
-        },
+        padding: "16px 32px",
+        fontSize: 18,
       },
     },
     disabled: {
-      look: {
-        opacity: 0.5,
-        cursor: "not-allowed",
-      },
+      opacity: 0.5,
+      cursor: "not-allowed",
     },
   },
 })
 
 const ButtonRow = define('ButtonRow', {
-  layout: {
-    display: 'flex',
-    gap: 16,
-    flexWrap: 'wrap',
-    alignItems: 'center',
-  }
+  display: 'flex',
+  gap: 16,
+  flexWrap: 'wrap',
+  alignItems: 'center',
 })
 
 export const ButtonExamplesPage = () => (
diff --git a/examples/helpers.tsx b/examples/helpers.tsx
index ea46141..b294d82 100644
--- a/examples/helpers.tsx
+++ b/examples/helpers.tsx
@@ -2,48 +2,35 @@ import { define, Styles } from '../src'
 
 export const Body = define('Body', {
   base: 'body',
-  layout: {
-    margin: 0,
-    padding: '40px 20px',
 
-  },
-  look: {
-    fontFamily: "-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif",
-    background: '#f3f4f6',
-  }
+  margin: 0,
+  padding: '40px 20px',
+  fontFamily: "-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif",
+  background: '#f3f4f6',
 })
 
 const Container = define('Container', {
-  layout: {
-    maxWidth: 1200,
-    margin: '0 auto'
-  }
+  maxWidth: 1200,
+  margin: '0 auto'
 })
 
 export const Header = define('Header', {
   base: 'h1',
-  layout: {
-    marginBottom: 40,
-  },
-  look: {
-    color: '#111827'
-  }
+
+  marginBottom: 40,
+  color: '#111827'
 })
 
 export const ExampleSection = define('ExampleSection', {
-  layout: {
-    marginBottom: 40
-  },
+  marginBottom: 40,
+
   parts: {
     Header: {
       base: 'h2',
-      layout: {
-        marginBottom: 16
-      },
-      look: {
-        color: '#374151',
-        fontSize: 18
-      }
+
+      marginBottom: 16,
+      color: '#374151',
+      fontSize: 18
     }
   },
   render({ props, parts: { Root, Header } }) {
diff --git a/examples/navigation.tsx b/examples/navigation.tsx
index 571285b..1d46b4a 100644
--- a/examples/navigation.tsx
+++ b/examples/navigation.tsx
@@ -2,37 +2,29 @@ import { define } from '../src'
 import { Layout, ExampleSection } from './helpers'
 
 const Tabs = define('Tabs', {
-  layout: {
-    display: 'flex',
-    gap: 0,
-  },
-  look: {
-    borderBottom: '2px solid #e5e7eb',
-  },
+  display: 'flex',
+  gap: 0,
+  borderBottom: '2px solid #e5e7eb',
 
   parts: {
     Tab: {
       base: 'button',
-      layout: {
-        padding: '12px 24px',
-        position: 'relative',
-        marginBottom: -2,
-      },
-      look: {
-        background: 'transparent',
-        border: 'none',
-        borderBottom: '2px solid transparent',
-        color: '#6b7280',
-        fontSize: 14,
-        fontWeight: 500,
-        cursor: 'pointer',
-        transition: 'all 0.2s ease',
-      },
+
+      padding: '12px 24px',
+      position: 'relative',
+      marginBottom: -2,
+      background: 'transparent',
+      border: 'none',
+      borderBottom: '2px solid transparent',
+      color: '#6b7280',
+      fontSize: 14,
+      fontWeight: 500,
+      cursor: 'pointer',
+      transition: 'all 0.2s ease',
+
       states: {
         ':hover': {
-          look: {
-            color: '#111827',
-          }
+          color: '#111827',
         }
       }
     }
@@ -42,10 +34,8 @@ const Tabs = define('Tabs', {
     active: {
       parts: {
         Tab: {
-          look: {
-            color: '#3b82f6',
-            borderBottom: '2px solid #3b82f6',
-          },
+          color: '#3b82f6',
+          borderBottom: '2px solid #3b82f6',
         }
       }
     }
@@ -69,34 +59,28 @@ const Tabs = define('Tabs', {
 })
 
 const Pills = define('Pills', {
-  layout: {
-    display: 'flex',
-    gap: 8,
-    flexWrap: 'wrap',
-  },
+  display: 'flex',
+  gap: 8,
+  flexWrap: 'wrap',
 
   parts: {
     Pill: {
       base: 'button',
-      layout: {
-        padding: '8px 16px',
-      },
-      look: {
-        background: '#f3f4f6',
-        border: 'none',
-        borderRadius: 20,
-        color: '#6b7280',
-        fontSize: 14,
-        fontWeight: 500,
-        cursor: 'pointer',
-        transition: 'all 0.2s ease',
-      },
+
+      padding: '8px 16px',
+      background: '#f3f4f6',
+      border: 'none',
+      borderRadius: 20,
+      color: '#6b7280',
+      fontSize: 14,
+      fontWeight: 500,
+      cursor: 'pointer',
+      transition: 'all 0.2s ease',
+
       states: {
         ':hover': {
-          look: {
-            background: '#e5e7eb',
-            color: '#111827',
-          }
+          background: '#e5e7eb',
+          color: '#111827',
         }
       }
     }
@@ -106,16 +90,12 @@ const Pills = define('Pills', {
     active: {
       parts: {
         Pill: {
-          look: {
-            background: '#3b82f6',
-            color: 'white',
-          },
+          background: '#3b82f6',
+          color: 'white',
           states: {
             ':hover': {
-              look: {
-                background: '#2563eb',
-                color: 'white',
-              }
+              background: '#2563eb',
+              color: 'white',
             }
           }
         }
@@ -141,52 +121,43 @@ const Pills = define('Pills', {
 })
 
 const VerticalNav = define('VerticalNav', {
-  layout: {
-    display: 'flex',
-    flexDirection: 'column',
-    gap: 4,
-    width: 240,
-  },
+  display: 'flex',
+  flexDirection: 'column',
+  gap: 4,
+  width: 240,
 
   parts: {
     NavItem: {
       base: 'a',
-      layout: {
-        padding: '12px 16px',
-        display: 'flex',
-        alignItems: 'center',
-        gap: 12,
-      },
-      look: {
-        background: 'transparent',
-        borderRadius: 8,
-        color: '#6b7280',
-        fontSize: 14,
-        fontWeight: 500,
-        textDecoration: 'none',
-        cursor: 'pointer',
-        transition: 'all 0.2s ease',
-      },
+
+      padding: '12px 16px',
+      display: 'flex',
+      alignItems: 'center',
+      gap: 12,
+
+      background: 'transparent',
+      borderRadius: 8,
+      color: '#6b7280',
+      fontSize: 14,
+      fontWeight: 500,
+      textDecoration: 'none',
+      cursor: 'pointer',
+      transition: 'all 0.2s ease',
+
       states: {
         ':hover': {
-          look: {
-            background: '#f3f4f6',
-            color: '#111827',
-          }
+          background: '#f3f4f6',
+          color: '#111827',
         }
       }
     },
     Icon: {
-      layout: {
-        width: 20,
-        height: 20,
-        display: 'flex',
-        alignItems: 'center',
-        justifyContent: 'center',
-      },
-      look: {
-        fontSize: 18,
-      }
+      width: 20,
+      height: 20,
+      display: 'flex',
+      alignItems: 'center',
+      justifyContent: 'center',
+      fontSize: 18,
     }
   },
 
@@ -194,16 +165,12 @@ const VerticalNav = define('VerticalNav', {
     active: {
       parts: {
         NavItem: {
-          look: {
-            background: '#eff6ff',
-            color: '#3b82f6',
-          },
+          background: '#eff6ff',
+          color: '#3b82f6',
           states: {
             ':hover': {
-              look: {
-                background: '#dbeafe',
-                color: '#2563eb',
-              }
+              background: '#dbeafe',
+              color: '#2563eb',
             }
           }
         }
@@ -230,43 +197,35 @@ const VerticalNav = define('VerticalNav', {
 })
 
 const Breadcrumbs = define('Breadcrumbs', {
-  layout: {
-    display: 'flex',
-    alignItems: 'center',
-    gap: 8,
-    flexWrap: 'wrap',
-  },
+  display: 'flex',
+  alignItems: 'center',
+  gap: 8,
+  flexWrap: 'wrap',
 
   parts: {
     Item: {
       base: 'a',
-      look: {
-        color: '#6b7280',
-        fontSize: 14,
-        textDecoration: 'none',
-        transition: 'color 0.2s ease',
-      },
+
+      color: '#6b7280',
+      fontSize: 14,
+      textDecoration: 'none',
+      transition: 'color 0.2s ease',
+
       states: {
         ':hover': {
-          look: {
-            color: '#3b82f6',
-          }
+          color: '#3b82f6',
         }
       }
     },
     Separator: {
-      look: {
-        color: '#d1d5db',
-        fontSize: 14,
-        userSelect: 'none',
-      }
+      color: '#d1d5db',
+      fontSize: 14,
+      userSelect: 'none',
     },
     Current: {
-      look: {
-        color: '#111827',
-        fontSize: 14,
-        fontWeight: 500,
-      }
+      color: '#111827',
+      fontSize: 14,
+      fontWeight: 500,
     }
   },
 
diff --git a/examples/profile.tsx b/examples/profile.tsx
index a79fdfc..7422174 100644
--- a/examples/profile.tsx
+++ b/examples/profile.tsx
@@ -4,167 +4,129 @@ import { Layout, ExampleSection } from './helpers'
 const UserProfile = define('UserProfile', {
   base: 'div',
 
-  layout: {
-    padding: 24,
-    maxWidth: 600,
-    margin: "0 auto",
-  },
-
-  look: {
-    background: "white",
-    borderRadius: 12,
-    boxShadow: "0 2px 8px rgba(0,0,0,0.1)",
-  },
+  padding: 24,
+  maxWidth: 600,
+  margin: "0 auto",
+  background: "white",
+  borderRadius: 12,
+  boxShadow: "0 2px 8px rgba(0,0,0,0.1)",
 
   parts: {
     Header: {
-      layout: {
-        display: "flex",
-        alignItems: "center",
-        gap: 16,
-        marginBottom: 16,
-      },
+      display: "flex",
+      alignItems: "center",
+      gap: 16,
+      marginBottom: 16,
     },
     Avatar: {
       base: 'img',
-      layout: {
-        width: 64,
-        height: 64,
-      },
-      look: {
-        borderRadius: "50%",
-        objectFit: "cover",
-        border: "3px solid #e5e7eb",
-      },
+      width: 64,
+      height: 64,
+      borderRadius: "50%",
+      objectFit: "cover",
+      border: "3px solid #e5e7eb",
     },
     Info: {
-      layout: {
-        flex: 1,
-      },
+      flex: 1,
     },
     Name: {
-      layout: {
-        marginBottom: 4,
-      },
-      look: {
-        fontSize: 20,
-        fontWeight: 600,
-        color: "#111827",
-      },
+      marginBottom: 4,
+      fontSize: 20,
+      fontWeight: 600,
+      color: "#111827",
     },
     Handle: {
-      look: {
-        fontSize: 14,
-        color: "#6b7280",
-      },
+      fontSize: 14,
+      color: "#6b7280",
     },
     Bio: {
-      layout: {
-        marginBottom: 16,
-        width: "100%",
-      },
-      look: {
-        fontSize: 14,
-        lineHeight: 1.6,
-        color: "#374151",
-        wordWrap: "break-word",
-      },
+      marginBottom: 16,
+      width: "100%",
+      fontSize: 14,
+      lineHeight: 1.6,
+      color: "#374151",
+      wordWrap: "break-word",
     },
     Stats: {
-      layout: {
-        display: "flex",
-        gap: 24,
-        paddingTop: 16,
-      },
-      look: {
-        borderTop: "1px solid #e5e7eb",
-      },
+      display: "flex",
+      gap: 24,
+      paddingTop: 16,
+      borderTop: "1px solid #e5e7eb",
     },
     Stat: {
-      layout: {
-        display: "flex",
-        flexDirection: "column",
-        gap: 4,
-      },
+      display: "flex",
+      flexDirection: "column",
+      gap: 4,
     },
     StatValue: {
-      look: {
-        fontSize: 18,
-        fontWeight: 600,
-        color: "#111827",
-      },
+      fontSize: 18,
+      fontWeight: 600,
+      color: "#111827",
     },
     StatLabel: {
-      look: {
-        fontSize: 12,
-        color: "#6b7280",
-        textTransform: "uppercase",
-      },
+      fontSize: 12,
+      color: "#6b7280",
+      textTransform: "uppercase",
     },
   },
 
   variants: {
     size: {
       compact: {
-        layout: { padding: 16, maxWidth: 300 },
+        padding: 16,
+        maxWidth: 300,
         parts: {
-          Avatar: { layout: { width: 48, height: 48 } },
-          Name: { look: { fontSize: 16 } },
-          Bio: { look: { fontSize: 13 } },
+          Avatar: { width: 48, height: 48 },
+          Name: { fontSize: 16 },
+          Bio: { fontSize: 13 },
         },
       },
       skinny: {
-        layout: { padding: 20, maxWidth: 125 },
+        padding: 20,
+        maxWidth: 125,
         parts: {
           Header: {
-            layout: {
-              flexDirection: "column",
-              alignItems: "center",
-              gap: 12,
-            }
+            flexDirection: "column",
+            alignItems: "center",
+            gap: 12,
           },
-          Avatar: { layout: { width: 80, height: 80 } },
-          Info: { layout: { flex: 0, width: "100%" } },
-          Name: { look: { textAlign: "center", fontSize: 18 } },
-          Handle: { look: { textAlign: "center" } },
-          Bio: { look: { textAlign: "center", fontSize: 13 } },
+          Avatar: { width: 80, height: 80 },
+          Info: { flex: 0, width: "100%" },
+          Name: { textAlign: "center", fontSize: 18 },
+          Handle: { textAlign: "center" },
+          Bio: { textAlign: "center", fontSize: 13 },
           Stats: {
-            layout: {
-              flexDirection: "column",
-              gap: 16,
-            }
+            flexDirection: "column",
+            gap: 16,
           },
-          Stat: { layout: { alignItems: "center" } },
+          Stat: { alignItems: "center" },
         },
       },
       large: {
-        layout: { padding: 32, maxWidth: 800 },
+        padding: 32,
+        maxWidth: 800,
         parts: {
-          Avatar: { layout: { width: 96, height: 96 } },
-          Name: { look: { fontSize: 24 } },
+          Avatar: { width: 96, height: 96 },
+          Name: { fontSize: 24 },
         },
       },
     },
     verified: {
       parts: {
         Avatar: {
-          look: {
-            border: "3px solid #3b82f6",
-          },
+          border: "3px solid #3b82f6",
         },
       },
     },
     theme: {
       dark: {
-        look: {
-          background: "#1f2937",
-        },
+        background: "#1f2937",
         parts: {
-          Name: { look: { color: "#f9fafb" } },
-          Handle: { look: { color: "#9ca3af" } },
-          Bio: { look: { color: "#d1d5db" } },
-          Stats: { look: { borderTop: "1px solid #374151" } },
-          StatValue: { look: { color: "#f9fafb" } },
+          Name: { color: "#f9fafb" },
+          Handle: { color: "#9ca3af" },
+          Bio: { color: "#d1d5db" },
+          Stats: { borderTop: "1px solid #374151" },
+          StatValue: { color: "#f9fafb" },
         },
       },
     },
diff --git a/src/index.tsx b/src/index.tsx
index 107ec27..c75339c 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,5 +1,5 @@
 import type { JSX } from 'hono/jsx'
-import { type TagDef, UnitlessProps } from './types'
+import { type TagDef, UnitlessProps, NonStyleKeys } from './types'
 
 export const styles: Record<string, Record<string, string>> = {}
 export const Styles = () => <style dangerouslySetInnerHTML={{ __html: stylesToCSS(styles) }} />
@@ -45,8 +45,10 @@ function camelToDash(name: string): string {
 function makeStyle(def: TagDef) {
   const style: Record<string, string> = {}
 
-  for (const [name, value] of Object.entries(Object.assign({}, def.layout ?? {}, def.look ?? {})))
+  for (const [name, value] of Object.entries(def)) {
+    if (NonStyleKeys.has(name)) continue
     style[camelToDash(name)] = `${typeof value === 'number' && !UnitlessProps.has(name) ? `${value}px` : value}`
+  }
 
   return style
 }
@@ -57,28 +59,37 @@ function makeComponent(baseName: string, rootDef: TagDef, rootProps: Record<stri
   const base = def.base ?? 'div'
   const Tag = (base) as keyof JSX.IntrinsicElements
 
-  const classNames = [makeClassName(baseName, partName)]
+  return ({ children, ...props }: { children: any, [key: string]: any }) => {
+    const classNames = [makeClassName(baseName, partName)]
 
-  for (const [key, value] of Object.entries(rootProps)) {
-    const variantConfig = rootDef.variants?.[key]
-    if (!variantConfig) continue
+    const allProps = { ...rootProps, ...props }
 
-    const variantName = key
-    const variantKey = value
+    for (const [key, value] of Object.entries(allProps)) {
+      const variantConfig = rootDef.variants?.[key]
+      if (!variantConfig) continue
 
-    let variantDef: TagDef | undefined
-    if ('parts' in variantConfig || 'layout' in variantConfig || 'look' in variantConfig) {
-      if (value === true) variantDef = variantConfig as TagDef
-    } else {
-      variantDef = (variantConfig as Record<string, TagDef>)[value as string]
+      // Remove variant prop from being passed to HTML element
+      delete props[key]
+
+      const variantName = key
+      const variantKey = value
+
+      let variantDef: TagDef | undefined
+      // Distinguish boolean variants from keyed variants:
+      // - Boolean variants: component({ variant: true }) → variantConfig is a TagDef
+      // - Keyed variants: component({ variant: 'key' }) → variantConfig[key] is a TagDef
+      if (value === true) {
+        variantDef = variantConfig as TagDef
+      } else if (typeof value === 'string') {
+        variantDef = (variantConfig as Record<string, TagDef>)[value]
+      }
+      if (!variantDef) continue
+
+      classNames.push(variantKey === true ? variantName : `${variantName}-${variantKey}`)
     }
-    if (!variantDef) continue
 
-    classNames.push(variantKey === true ? variantName : `${variantName}-${variantKey}`)
+    return <Tag class={classNames.join(' ')} {...props}>{children}</Tag>
   }
-
-  return ({ children, ...props }: { children: any, [key: string]: any }) =>
-    <Tag class={classNames.join(' ')} {...props}>{children}</Tag>
 }
 
 // adds CSS styles for tag definition
@@ -98,13 +109,17 @@ function registerStyles(name: string, def: TagDef) {
   }
 
   for (const [variantName, variantConfig] of Object.entries(def.variants ?? {})) {
-    // Check if it's a boolean variant (has layout/look/parts directly) or a keyed variant
-    if ('parts' in variantConfig || 'layout' in variantConfig || 'look' in variantConfig) {
-      // Boolean variant - treat variantConfig as TagDef
+    // Detect boolean vs keyed variants by checking if config has structural keys or looks like a TagDef
+    const isBooleanVariant = 'parts' in variantConfig || 'styles' in variantConfig || 'states' in variantConfig ||
+      // If first key is camelCase or contains CSS-like properties, treat as boolean variant
+      Object.keys(variantConfig).some(k => k !== k.toLowerCase() || typeof (variantConfig as any)[k] !== 'object')
+
+    if (isBooleanVariant) {
+      // Boolean variant - variantConfig is a TagDef
       const variantDef = variantConfig as TagDef
       const baseClassName = makeClassName(name)
       const className = `${baseClassName}.${variantName}`
-      styles[className] ??= makeStyle({ layout: variantDef.layout, look: variantDef.look })
+      styles[className] ??= makeStyle(variantDef)
       for (const [state, style] of Object.entries(variantDef.states ?? {}))
         styles[`${className}${state}`] = makeStyle(style)
 
@@ -119,7 +134,7 @@ function registerStyles(name: string, def: TagDef) {
       // Keyed variant - iterate over the keys
       for (const [variantKey, variantDef] of Object.entries(variantConfig as Record<string, TagDef>)) {
         const className = makeClassName(name, undefined, variantName, variantKey)
-        styles[className] ??= makeStyle({ layout: variantDef.layout, look: variantDef.look })
+        styles[className] ??= makeStyle(variantDef)
         for (const [state, style] of Object.entries(variantDef.states ?? {}))
           styles[`${className}${state}`] = makeStyle(style)
 
diff --git a/src/tests/index.test.tsx b/src/tests/index.test.tsx
index 19424b0..9a130c6 100644
--- a/src/tests/index.test.tsx
+++ b/src/tests/index.test.tsx
@@ -5,7 +5,7 @@ import { renderToString, getStylesCSS, parseCSS } from './test_helpers'
 describe('define - basic functionality', () => {
   test('creates a component function', () => {
     const Component = define({
-      layout: { display: 'flex' }
+      display: 'flex'
     })
 
     expect(typeof Component).toBe('function')
@@ -13,7 +13,7 @@ describe('define - basic functionality', () => {
 
   test('component returns a JSX element', () => {
     const Component = define({
-      layout: { display: 'flex' }
+      display: 'flex'
     })
 
     const result = Component({})
@@ -23,7 +23,7 @@ describe('define - basic functionality', () => {
 
   test('applies className to rendered element', () => {
     const Component = define('MyComponent', {
-      layout: { display: 'flex' }
+      display: 'flex'
     })
 
     const html = renderToString(Component({}))
@@ -31,8 +31,8 @@ describe('define - basic functionality', () => {
   })
 
   test('generates unique anonymous component names', () => {
-    const Component1 = define({ layout: { display: 'flex' } })
-    const Component2 = define({ layout: { display: 'block' } })
+    const Component1 = define({ display: 'flex' })
+    const Component2 = define({ display: 'block' })
 
     const html1 = renderToString(Component1({}))
     const html2 = renderToString(Component2({}))
@@ -45,7 +45,7 @@ describe('define - basic functionality', () => {
 
   test('renders default div element', () => {
     const Component = define('DivTest', {
-      layout: { display: 'flex' }
+      display: 'flex'
     })
 
     const html = renderToString(Component({}))
@@ -56,7 +56,7 @@ describe('define - basic functionality', () => {
   test('respects custom base element', () => {
     const Component = define('ButtonTest', {
       base: 'button',
-      look: { color: 'blue' }
+      color: 'blue'
     })
 
     const html = renderToString(Component({}))
@@ -83,11 +83,9 @@ describe('define - basic functionality', () => {
 describe('CSS generation - camelCase to kebab-case', () => {
   test('converts camelCase properties to kebab-case', () => {
     define('CamelTest', {
-      layout: {
-        flexDirection: 'column',
-        alignItems: 'center',
-        justifyContent: 'space-between'
-      }
+      flexDirection: 'column',
+      alignItems: 'center',
+      justifyContent: 'space-between'
     })
 
     const css = getStylesCSS()
@@ -98,10 +96,8 @@ describe('CSS generation - camelCase to kebab-case', () => {
 
   test('handles consecutive capital letters', () => {
     define('ConsecutiveTest', {
-      look: {
-        backgroundColor: 'red',
-        borderRadius: 5
-      }
+      backgroundColor: 'red',
+      borderRadius: 5
     })
 
     const css = getStylesCSS()
@@ -113,12 +109,10 @@ describe('CSS generation - camelCase to kebab-case', () => {
 describe('CSS generation - numeric values and units', () => {
   test('adds px unit to numeric layout values', () => {
     define('NumericTest', {
-      layout: {
-        width: 100,
-        height: 200,
-        padding: 16,
-        margin: 8
-      }
+      width: 100,
+      height: 200,
+      padding: 16,
+      margin: 8
     })
 
     const styles = parseCSS(getStylesCSS())
@@ -130,12 +124,10 @@ describe('CSS generation - numeric values and units', () => {
 
   test('preserves string values without adding px', () => {
     define('StringTest', {
-      layout: {
-        width: '100%',
-        height: 'auto',
-        margin: '0 auto',
-        padding: '1rem'
-      }
+      width: '100%',
+      height: 'auto',
+      margin: '0 auto',
+      padding: '1rem'
     })
 
     const styles = parseCSS(getStylesCSS())
@@ -147,18 +139,14 @@ describe('CSS generation - numeric values and units', () => {
 
   test('does not add px to unitless properties', () => {
     define('UnitlessTest', {
-      layout: {
-        flex: 1,
-        flexGrow: 2,
-        flexShrink: 1,
-        zIndex: 10,
-        order: 3
-      },
-      look: {
-        opacity: 0.5,
-        fontWeight: 700,
-        lineHeight: 1.5
-      }
+      flex: 1,
+      flexGrow: 2,
+      flexShrink: 1,
+      zIndex: 10,
+      order: 3,
+      opacity: 0.5,
+      fontWeight: 700,
+      lineHeight: 1.5
     })
 
     const styles = parseCSS(getStylesCSS())
@@ -174,14 +162,10 @@ describe('CSS generation - numeric values and units', () => {
 
   test('handles numeric zero values correctly', () => {
     define('ZeroTest', {
-      layout: {
-        margin: 0,
-        padding: 0,
-        zIndex: 0
-      },
-      look: {
-        opacity: 0
-      }
+      margin: 0,
+      padding: 0,
+      zIndex: 0,
+      opacity: 0
     })
 
     const styles = parseCSS(getStylesCSS())
@@ -195,12 +179,10 @@ describe('CSS generation - numeric values and units', () => {
 describe('CSS generation - layout and look', () => {
   test('generates CSS for layout properties', () => {
     define('LayoutTest', {
-      layout: {
-        display: 'flex',
-        flexDirection: 'column',
-        gap: 16,
-        padding: 20
-      }
+      display: 'flex',
+      flexDirection: 'column',
+      gap: 16,
+      padding: 20
     })
 
     const css = getStylesCSS()
@@ -213,12 +195,10 @@ describe('CSS generation - layout and look', () => {
 
   test('generates CSS for look properties', () => {
     define('LookTest', {
-      look: {
-        color: 'blue',
-        backgroundColor: 'white',
-        fontSize: 16,
-        fontWeight: 600
-      }
+      color: 'blue',
+      backgroundColor: 'white',
+      fontSize: 16,
+      fontWeight: 600
     })
 
     const css = getStylesCSS()
@@ -231,14 +211,10 @@ describe('CSS generation - layout and look', () => {
 
   test('combines layout and look properties', () => {
     define('CombinedTest', {
-      layout: {
-        display: 'flex',
-        padding: 16
-      },
-      look: {
-        color: 'blue',
-        backgroundColor: 'white'
-      }
+      display: 'flex',
+      padding: 16,
+      color: 'blue',
+      backgroundColor: 'white'
     })
 
     const styles = parseCSS(getStylesCSS())
@@ -253,11 +229,11 @@ describe('CSS generation - layout and look', () => {
 describe('CSS generation - parts', () => {
   test('generates separate CSS for each part', () => {
     define('PartTest', {
-      layout: { display: 'flex' },
+      display: 'flex',
       parts: {
-        Header: { base: 'header', look: { color: 'red', fontSize: 20 } },
-        Body: { base: 'main', layout: { padding: 20 } },
-        Footer: { base: 'footer', look: { fontSize: 12 } }
+        Header: { base: 'header', color: 'red', fontSize: 20 },
+        Body: { base: 'main', padding: 20 },
+        Footer: { base: 'footer', fontSize: 12 }
       }
     })
 
@@ -271,7 +247,7 @@ describe('CSS generation - parts', () => {
   test('part className format is ComponentName_PartName', () => {
     define('ComponentWithParts', {
       parts: {
-        MyPart: { look: { color: 'green' } }
+        MyPart: { color: 'green' }
       }
     })
 
@@ -345,10 +321,10 @@ describe('components with parts', () => {
 describe('variants - boolean variants', () => {
   test('applies boolean variant class when true', () => {
     const Component = define('BoolVariant', {
-      layout: { display: 'flex' },
+      display: 'flex',
       variants: {
         primary: {
-          look: { color: 'blue' }
+          color: 'blue'
         }
       }
     })
@@ -362,7 +338,7 @@ describe('variants - boolean variants', () => {
     const Component = define('BoolVariantFalse', {
       variants: {
         active: {
-          look: { backgroundColor: 'green' }
+          backgroundColor: 'green'
         }
       }
     })
@@ -379,10 +355,10 @@ describe('variants - boolean variants', () => {
 
   test('generates CSS for component with boolean variant', () => {
     define('BoolVariantCSS', {
-      layout: { display: 'block' },
+      display: 'block',
       variants: {
         active: {
-          look: { backgroundColor: 'green' }
+          backgroundColor: 'green'
         }
       }
     })
@@ -398,9 +374,9 @@ describe('variants - string/enum variants', () => {
     const Component = define('StringVariant', {
       variants: {
         size: {
-          small: { layout: { padding: 8 } },
-          medium: { layout: { padding: 16 } },
-          large: { layout: { padding: 24 } }
+          small: { padding: 8 },
+          medium: { padding: 16 },
+          large: { padding: 24 }
         }
       }
     })
@@ -416,9 +392,9 @@ describe('variants - string/enum variants', () => {
     define('ColorVariant', {
       variants: {
         color: {
-          red: { look: { color: 'red', backgroundColor: '#ffeeee' } },
-          blue: { look: { color: 'blue', backgroundColor: '#eeeeff' } },
-          green: { look: { color: 'green', backgroundColor: '#eeffee' } }
+          red: { color: 'red', backgroundColor: '#ffeeee' },
+          blue: { color: 'blue', backgroundColor: '#eeeeff' },
+          green: { color: 'green', backgroundColor: '#eeffee' }
         }
       }
     })
@@ -433,12 +409,12 @@ describe('variants - string/enum variants', () => {
     const Component = define('MultiVariant', {
       variants: {
         size: {
-          small: { layout: { padding: 8 } },
-          large: { layout: { padding: 24 } }
+          small: { padding: 8 },
+          large: { padding: 24 }
         },
         color: {
-          red: { look: { color: 'red' } },
-          blue: { look: { color: 'blue' } }
+          red: { color: 'red' },
+          blue: { color: 'blue' }
         }
       }
     })
@@ -452,7 +428,7 @@ describe('variants - string/enum variants', () => {
     const Component = define('UndefinedVariant', {
       variants: {
         size: {
-          small: { layout: { padding: 8 } }
+          small: { padding: 8 }
         }
       }
     })
@@ -466,7 +442,7 @@ describe('variants - string/enum variants', () => {
     const Component = define('NonVariantProps', {
       variants: {
         size: {
-          small: { layout: { padding: 8 } }
+          small: { padding: 8 }
         }
       }
     })
@@ -488,12 +464,12 @@ describe('variants with parts', () => {
         theme: {
           dark: {
             parts: {
-              Header: { look: { color: 'white', backgroundColor: 'black' } }
+              Header: { color: 'white', backgroundColor: 'black' }
             }
           },
           light: {
             parts: {
-              Header: { look: { color: 'black', backgroundColor: 'white' } }
+              Header: { color: 'black', backgroundColor: 'white' }
             }
           }
         }
@@ -514,7 +490,7 @@ describe('variants with parts', () => {
       },
       variants: {
         size: {
-          large: { layout: { padding: 20 } }
+          large: { padding: 20 }
         }
       },
       render: ({ props, parts }) => {
@@ -531,7 +507,7 @@ describe('variants with parts', () => {
 describe('custom render function', () => {
   test('uses custom render when provided', () => {
     const Component = define('CustomRender', {
-      layout: { display: 'flex' },
+      display: 'flex',
       render: ({ props, parts }) => {
         return <div class="custom-wrapper">{props.children}</div>
       }
@@ -596,7 +572,7 @@ describe('Styles component', () => {
   })
 
   test('Styles renders to HTML with CSS', () => {
-    define('StylesComp1', { layout: { width: 100 } })
+    define('StylesComp1', { width: 100 })
 
     const html = renderToString(define.Styles())
     expect(html).toContain('<style>')
@@ -606,8 +582,8 @@ describe('Styles component', () => {
   })
 
   test('Styles includes CSS for all registered components', () => {
-    define('StylesComp2', { layout: { width: 100 } })
-    define('StylesComp3', { layout: { height: 200 } })
+    define('StylesComp2', { width: 100 })
+    define('StylesComp3', { height: 200 })
 
     const css = getStylesCSS()
     expect(css).toContain('.StylesComp2')
@@ -620,8 +596,8 @@ describe('Styles component', () => {
     define('StylesVariant', {
       variants: {
         size: {
-          small: { layout: { padding: 8 } },
-          large: { layout: { padding: 24 } }
+          small: { padding: 8 },
+          large: { padding: 24 }
         }
       }
     })
@@ -636,8 +612,8 @@ describe('Styles component', () => {
   test('Styles includes part CSS', () => {
     define('StylesPart', {
       parts: {
-        Header: { look: { color: 'red' } },
-        Body: { look: { color: 'blue' } }
+        Header: { color: 'red' },
+        Body: { color: 'blue' }
       }
     })
 
@@ -649,6 +625,125 @@ describe('Styles component', () => {
   })
 })
 
+describe('variants on parts via props', () => {
+  test('applies boolean variant to part when passed as prop', () => {
+    const Component = define('PartVariantBool', {
+      parts: {
+        Tab: { base: 'button', color: 'gray' }
+      },
+      variants: {
+        active: {
+          parts: {
+            Tab: { color: 'blue' }
+          }
+        }
+      },
+      render: ({ props, parts }) => {
+        return (
+          <parts.Root>
+            <parts.Tab active={true}>Active Tab</parts.Tab>
+            <parts.Tab active={false}>Inactive Tab</parts.Tab>
+          </parts.Root>
+        )
+      }
+    })
+
+    const html = renderToString(Component({}))
+    // Should have one tab with active class, one without
+    expect(html).toContain('PartVariantBool_Tab active')
+    // Count occurrences - should have 2 tabs total
+    const tabCount = (html.match(/PartVariantBool_Tab/g) || []).length
+    expect(tabCount).toBe(2)
+  })
+
+  test('applies string variant to part when passed as prop', () => {
+    const Component = define('PartVariantString', {
+      parts: {
+        Pill: { base: 'button' }
+      },
+      variants: {
+        size: {
+          small: { parts: { Pill: { padding: 8 } } },
+          large: { parts: { Pill: { padding: 24 } } }
+        }
+      },
+      render: ({ props, parts }) => {
+        return (
+          <parts.Root>
+            <parts.Pill size="small">Small</parts.Pill>
+            <parts.Pill size="large">Large</parts.Pill>
+          </parts.Root>
+        )
+      }
+    })
+
+    const html = renderToString(Component({}))
+    expect(html).toContain('PartVariantString_Pill size-small')
+    expect(html).toContain('PartVariantString_Pill size-large')
+  })
+
+  test('does not pass variant props through to HTML', () => {
+    const Component = define('NoVariantLeakage', {
+      parts: {
+        Item: { base: 'div' }
+      },
+      variants: {
+        active: {
+          parts: { Item: { color: 'blue' } }
+        }
+      },
+      render: ({ props, parts }) => {
+        return (
+          <parts.Root>
+            <parts.Item active={true}>Item</parts.Item>
+          </parts.Root>
+        )
+      }
+    })
+
+    const html = renderToString(Component({}))
+    // Should have the class, but not the attribute
+    expect(html).toContain('class="NoVariantLeakage_Item active"')
+    expect(html).not.toContain('active="true"')
+    expect(html).not.toContain('active="false"')
+  })
+
+  test('combines root and part level variants', () => {
+    const Component = define('CombinedVariants', {
+      parts: {
+        NavItem: { base: 'a' }
+      },
+      variants: {
+        theme: {
+          dark: {
+            backgroundColor: 'black',
+            parts: { NavItem: { color: 'white' } }
+          }
+        },
+        active: {
+          parts: { NavItem: { fontWeight: 700 } }
+        }
+      },
+      render: ({ props, parts }) => {
+        return (
+          <parts.Root>
+            <parts.NavItem active={true}>Active Link</parts.NavItem>
+            <parts.NavItem active={false}>Inactive Link</parts.NavItem>
+          </parts.Root>
+        )
+      }
+    })
+
+    const html = renderToString(Component({ theme: 'dark' }))
+    // Root should have theme variant
+    expect(html).toContain('CombinedVariants theme-dark')
+    // Active NavItem should have both theme and active classes
+    expect(html).toContain('CombinedVariants_NavItem theme-dark active')
+    // Inactive NavItem should have only theme class
+    expect(html).toMatch(/CombinedVariants_NavItem theme-dark"[^>]*>Inactive/)
+  })
+})
+
 describe('edge cases', () => {
   test('handles empty definition', () => {
     const Component = define({})
@@ -673,7 +768,7 @@ describe('edge cases', () => {
     const Component = define({
       variants: {
         size: {
-          small: { layout: { padding: 8 } }
+          small: { padding: 8 }
         }
       }
     })
@@ -683,8 +778,8 @@ describe('edge cases', () => {
   })
 
   test('does not duplicate styles when registered multiple times', () => {
-    define('NoDuplicate', { layout: { width: 100 } })
-    define('NoDuplicate', { layout: { width: 200 } })
+    define('NoDuplicate', { width: 100 })
+    define('NoDuplicate', { width: 200 })
 
     const styles = parseCSS(getStylesCSS())
     // Should keep first value (??= operator)
@@ -693,18 +788,18 @@ describe('edge cases', () => {
 
   test('handles complex nested structures', () => {
     define('ComplexNested', {
-      layout: { display: 'grid' },
+      display: 'grid',
       parts: {
-        Container: { layout: { padding: 16 } },
-        Item: { look: { fontSize: 14 } }
+        Container: { padding: 16 },
+        Item: { fontSize: 14 }
       },
       variants: {
         theme: {
           dark: {
-            look: { backgroundColor: 'black' },
+            backgroundColor: 'black',
             parts: {
-              Container: { look: { backgroundColor: '#222' } },
-              Item: { look: { color: 'white' } }
+              Container: { backgroundColor: '#222' },
+              Item: { color: 'white' }
             }
           }
         }
diff --git a/src/types.ts b/src/types.ts
index 1d97797..c24a8f7 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,37 +1,39 @@
 export type TagDef = {
   className?: string
   base?: string
-  layout?: Layout
-  look?: Look
   states?: Record<string, TagDef>,
   parts?: Record<string, TagDef>
   variants?: Record<string, TagDef | Record<string, TagDef>>
   render?: (obj: any) => any
-}
 
-type Layout = {
-  alignContent?: string
-  alignItems?: string
-  alignSelf?: string
+  // layout-related
+  alignContent?: 'normal' | 'flex-start' | 'flex-end' | 'center' | 'space-between' | 'space-around' | 'space-evenly' | 'stretch' | 'start' | 'end' | 'baseline' | string
+  alignItems?: 'normal' | 'flex-start' | 'flex-end' | 'center' | 'stretch' | 'baseline' | 'start' | 'end' | 'self-start' | 'self-end' | string
+  alignSelf?: 'auto' | 'normal' | 'flex-start' | 'flex-end' | 'center' | 'stretch' | 'baseline' | 'start' | 'end' | 'self-start' | 'self-end' | string
+  aspectRatio?: number | string
   bottom?: number | string
-  display?: string
+  boxSizing?: 'content-box' | 'border-box'
+  columnGap?: number | string
+  contain?: 'none' | 'strict' | 'content' | 'size' | 'layout' | 'style' | 'paint' | string
+  display?: 'block' | 'inline' | 'inline-block' | 'flex' | 'inline-flex' | 'grid' | 'inline-grid' | 'flow-root' | 'none' | 'contents' | 'table' | 'table-row' | 'table-cell' | string
   flex?: number | string
   flexBasis?: number | string
-  flexDirection?: string
+  flexDirection?: 'row' | 'row-reverse' | 'column' | 'column-reverse'
   flexGrow?: number
   flexShrink?: number
-  flexWrap?: string
+  flexWrap?: 'nowrap' | 'wrap' | 'wrap-reverse'
   gap?: number | string
-  gridAutoFlow?: string
+  gridAutoFlow?: 'row' | 'column' | 'dense' | 'row dense' | 'column dense'
   gridColumn?: string
   gridGap?: number | string
   gridRow?: string
   gridTemplateColumns?: string
   gridTemplateRows?: string
   height?: number | string
-  justifyContent?: string
-  justifyItems?: string
-  justifySelf?: string
+  inset?: number | string
+  justifyContent?: 'normal' | 'flex-start' | 'flex-end' | 'center' | 'space-between' | 'space-around' | 'space-evenly' | 'start' | 'end' | 'left' | 'right' | 'stretch' | string
+  justifyItems?: 'normal' | 'flex-start' | 'flex-end' | 'center' | 'stretch' | 'baseline' | 'start' | 'end' | 'self-start' | 'self-end' | 'left' | 'right' | string
+  justifySelf?: 'auto' | 'normal' | 'flex-start' | 'flex-end' | 'center' | 'stretch' | 'baseline' | 'start' | 'end' | 'self-start' | 'self-end' | 'left' | 'right' | string
   left?: number | string
   margin?: number | string
   marginBottom?: number | string
@@ -43,70 +45,125 @@ type Layout = {
   minHeight?: number | string
   minWidth?: number | string
   order?: number
-  overflow?: string
-  overflowX?: string
-  overflowY?: string
+  overflow?: 'visible' | 'hidden' | 'scroll' | 'auto' | 'clip'
+  overflowX?: 'visible' | 'hidden' | 'scroll' | 'auto' | 'clip'
+  overflowY?: 'visible' | 'hidden' | 'scroll' | 'auto' | 'clip'
   padding?: number | string
   paddingBottom?: number | string
   paddingLeft?: number | string
   paddingRight?: number | string
   paddingTop?: number | string
-  position?: string
+  placeContent?: string
+  placeItems?: string
+  placeSelf?: string
+  position?: 'static' | 'relative' | 'absolute' | 'fixed' | 'sticky'
   right?: number | string
+  rowGap?: number | string
   top?: number | string
+  verticalAlign?: 'baseline' | 'top' | 'middle' | 'bottom' | 'text-top' | 'text-bottom' | 'sub' | 'super' | string
   width?: number | string
   zIndex?: number
-}
 
-type Look = {
+  // visual/theme-related
   animation?: string
+  appearance?: 'none' | 'auto' | 'button' | 'textfield' | 'searchfield' | 'textarea' | 'checkbox' | 'radio' | string
   backdropFilter?: string
   background?: string
+  backgroundAttachment?: 'scroll' | 'fixed' | 'local'
+  backgroundClip?: 'border-box' | 'padding-box' | 'content-box' | 'text'
   backgroundColor?: string
+  backgroundImage?: string
+  backgroundPosition?: string
+  backgroundRepeat?: 'repeat' | 'repeat-x' | 'repeat-y' | 'no-repeat' | 'space' | 'round'
+  backgroundSize?: 'auto' | 'cover' | 'contain' | string
   border?: string
   borderBottom?: string
+  borderBottomColor?: string
+  borderBottomLeftRadius?: number | string
+  borderBottomRightRadius?: number | string
+  borderBottomStyle?: 'none' | 'solid' | 'dashed' | 'dotted' | 'double' | 'groove' | 'ridge' | 'inset' | 'outset' | 'hidden'
+  borderBottomWidth?: number | string
   borderColor?: string
   borderLeft?: string
+  borderLeftColor?: string
+  borderLeftStyle?: 'none' | 'solid' | 'dashed' | 'dotted' | 'double' | 'groove' | 'ridge' | 'inset' | 'outset' | 'hidden'
+  borderLeftWidth?: number | string
   borderRadius?: number | string
   borderRight?: string
-  borderStyle?: string
+  borderRightColor?: string
+  borderRightStyle?: 'none' | 'solid' | 'dashed' | 'dotted' | 'double' | 'groove' | 'ridge' | 'inset' | 'outset' | 'hidden'
+  borderRightWidth?: number | string
+  borderStyle?: 'none' | 'solid' | 'dashed' | 'dotted' | 'double' | 'groove' | 'ridge' | 'inset' | 'outset' | 'hidden'
   borderTop?: string
+  borderTopColor?: string
+  borderTopLeftRadius?: number | string
+  borderTopRightRadius?: number | string
+  borderTopStyle?: 'none' | 'solid' | 'dashed' | 'dotted' | 'double' | 'groove' | 'ridge' | 'inset' | 'outset' | 'hidden'
+  borderTopWidth?: number | string
   borderWidth?: number | string
   boxShadow?: string
+  clipPath?: string
   color?: string
-  cursor?: string
+  content?: string
+  cursor?: 'auto' | 'default' | 'none' | 'context-menu' | 'help' | 'pointer' | 'progress' | 'wait' | 'cell' | 'crosshair' | 'text' | 'vertical-text' | 'alias' | 'copy' | 'move' | 'no-drop' | 'not-allowed' | 'grab' | 'grabbing' | 'e-resize' | 'n-resize' | 'ne-resize' | 'nw-resize' | 's-resize' | 'se-resize' | 'sw-resize' | 'w-resize' | 'ew-resize' | 'ns-resize' | 'nesw-resize' | 'nwse-resize' | 'col-resize' | 'row-resize' | 'all-scroll' | 'zoom-in' | 'zoom-out' | string
   filter?: string
   fontFamily?: string
   fontSize?: number | string
-  fontStyle?: string
-  fontWeight?: number | string
+  fontStyle?: 'normal' | 'italic' | 'oblique'
+  fontWeight?: 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 'normal' | 'bold' | 'bolder' | 'lighter' | number
+  isolation?: 'auto' | 'isolate'
   letterSpacing?: number | string
   lineHeight?: number | string
-  mixBlendMode?: string
-  objectFit?: string
+  listStyle?: string
+  listStyleImage?: string
+  listStylePosition?: 'inside' | 'outside'
+  listStyleType?: 'none' | 'disc' | 'circle' | 'square' | 'decimal' | 'decimal-leading-zero' | 'lower-roman' | 'upper-roman' | 'lower-alpha' | 'upper-alpha' | 'lower-greek' | 'lower-latin' | 'upper-latin' | string
+  mixBlendMode?: 'normal' | 'multiply' | 'screen' | 'overlay' | 'darken' | 'lighten' | 'color-dodge' | 'color-burn' | 'hard-light' | 'soft-light' | 'difference' | 'exclusion' | 'hue' | 'saturation' | 'color' | 'luminosity'
+  objectFit?: 'fill' | 'contain' | 'cover' | 'none' | 'scale-down'
   opacity?: number
   outline?: string
   outlineColor?: string
   outlineOffset?: number | string
-  outlineStyle?: string
+  outlineStyle?: 'none' | 'solid' | 'dashed' | 'dotted' | 'double' | 'groove' | 'ridge' | 'inset' | 'outset'
   outlineWidth?: number | string
-  pointerEvents?: string
-  textAlign?: string
+  pointerEvents?: 'auto' | 'none' | 'visiblePainted' | 'visibleFill' | 'visibleStroke' | 'visible' | 'painted' | 'fill' | 'stroke' | 'all'
+  resize?: 'none' | 'both' | 'horizontal' | 'vertical' | 'block' | 'inline'
+  scrollBehavior?: 'auto' | 'smooth'
+  textAlign?: 'left' | 'right' | 'center' | 'justify' | 'start' | 'end'
   textDecoration?: string
-  textOverflow?: string
+  textDecorationColor?: string
+  textDecorationLine?: 'none' | 'underline' | 'overline' | 'line-through' | 'blink' | string
+  textDecorationStyle?: 'solid' | 'double' | 'dotted' | 'dashed' | 'wavy'
+  textDecorationThickness?: number | string
+  textIndent?: number | string
+  textOverflow?: 'clip' | 'ellipsis' | string
   textShadow?: string
-  textTransform?: string
+  textTransform?: 'none' | 'capitalize' | 'uppercase' | 'lowercase' | 'full-width' | 'full-size-kana'
   transform?: string
   transition?: string
-  userSelect?: string
-  visibility?: string
-  whiteSpace?: string
-  wordWrap?: string
-  overflowWrap?: string
+  userSelect?: 'auto' | 'none' | 'text' | 'contain' | 'all'
+  visibility?: 'visible' | 'hidden' | 'collapse'
+  whiteSpace?: 'normal' | 'nowrap' | 'pre' | 'pre-wrap' | 'pre-line' | 'break-spaces'
+  willChange?: 'auto' | 'scroll-position' | 'contents' | string
+  wordBreak?: 'normal' | 'break-all' | 'keep-all' | 'break-word'
+  wordSpacing?: number | string
+  wordWrap?: 'normal' | 'break-word' | 'anywhere'
+  overflowWrap?: 'normal' | 'break-word' | 'anywhere'
 }
 
+export const NonStyleKeys = new Set([
+  'className',
+  'base',
+  'states',
+  'parts',
+  'variants',
+  'render',
+  'styles',
+])
+
 export const UnitlessProps = new Set([
   'animationIterationCount',
+  'aspectRatio',
   'columnCount',
   'flex',
   'flexGrow',