material-design
Skill1 starsChanged 4 months agoMITView on GitHub
Design no padrão Google Material Design 3 (Material You): color roles com tonal palettes, dynamic color, type scale, elevação tonal, shape e motion emphasized. Use quando o usuário mencionar: "Material Design", "Material You", "Material 3", "MD3", "estilo Google", "Android UI", "app Android", "design do Google", componentes Material. Consulta ../_shared/design-resources.md antes de gerar UI.
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- Marvellbrazil/my-agentic-skillstheir own version, first seen Oct 17, 2026
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- Marvellbrazil/my-agentic-skills★ 4same name
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The file
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Material Design 3 (Google)
Você atua como um designer que domina o Material Design 3. MD3 é sistemático: tudo deriva de color roles e um type scale, não de valores soltos.
Princípios
- Color roles, não cores — nunca use um hex direto num componente; use o papel (
primary,on-primary,surface,surface-container). Isso garante dark mode e dynamic color de graça. - Tonal elevation — no MD3 elevação é indicada por cor de superfície (surface-container tons), não só por sombra.
- Dynamic color — a paleta nasce de uma cor-fonte (seed) → tonal palettes (0–100).
- Expressivo mas acessível — cores vibrantes com contraste garantido pelos tone pairs (ex:
primary40 /on-primary100 no light).
Color roles (light / dark)
:root {
/* Light */
--md-sys-color-primary: #6750a4;
--md-sys-color-on-primary: #ffffff;
--md-sys-color-primary-container: #eaddff;
--md-sys-color-on-primary-container: #21005d;
--md-sys-color-secondary: #625b71;
--md-sys-color-tertiary: #7d5260;
--md-sys-color-surface: #fef7ff;
--md-sys-color-surface-container: #f3edf7;
--md-sys-color-surface-container-high: #ece6f0;
--md-sys-color-on-surface: #1d1b20;
--md-sys-color-on-surface-variant: #49454f;
--md-sys-color-outline: #79747e;
--md-sys-color-error: #b3261e;
}
:root[data-theme="dark"] {
--md-sys-color-primary: #d0bcff;
--md-sys-color-on-primary: #381e72;
--md-sys-color-primary-container: #4f378b;
--md-sys-color-surface: #141218;
--md-sys-color-surface-container: #211f26;
--md-sys-color-on-surface: #e6e0e9;
--md-sys-color-outline: #938f99;
}Type scale (Roboto / Google Sans)
--md-display-large: 400 57px/64px 'Roboto';
--md-headline-large: 400 32px/40px 'Roboto';
--md-title-large: 500 22px/28px 'Roboto'; /* app bar */
--md-body-large: 400 16px/24px 'Roboto';
--md-label-large: 500 14px/20px 'Roboto'; /* botões */Shape & elevation
--md-corner-xs: 4px; --md-corner-sm: 8px; --md-corner-md: 12px;
--md-corner-lg: 16px; --md-corner-xl: 28px; --md-corner-full: 9999px;
/* Elevação = cor + sombra sutil */
.md-card { background: var(--md-sys-color-surface-container-low); border-radius: 12px; }
.md-fab { background: var(--md-sys-color-primary-container); border-radius: 16px;
box-shadow: 0 3px 6px rgba(0,0,0,.15); }Componentes-chave
/* Filled button */
.md-btn { background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary);
border: none; border-radius: 9999px; padding: 10px 24px; font: var(--md-label-large);
height: 40px; transition: box-shadow .2s; }
.md-btn:hover { box-shadow: 0 1px 3px rgba(0,0,0,.3); } /* state layer 8% por cima */
/* Motion: emphasized easing (M3) */
--md-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
--md-duration-medium: 300ms;Recursos externos
| Recurso | O que pegar |
| m3.material.io | Especificação oficial MD3: color, type, shape, motion, componentes. |
| Material Theme Builder | Gera todos os color roles a partir de uma cor-seed. Export CSS/Figma. |
| Material Web (components) | Web components oficiais <md-*>. |
| Material Symbols | Ícones oficiais (variable: weight, fill, grade). |
| material.io/blog | Padrões e estudos de caso. |
| ../_shared/design-resources.md | Lottie, contraste, fontes, acessibilidade. |
Do / Don't
| Do | Don't |
| Referenciar color roles | Hardcodar hex nos componentes |
| Elevação por surface-container | Só sombra pesada como no MD2 |
| Emphasized easing em transições | ease-in-out genérico |
| Botão pill (full radius) | Cantos retos de app antigo |
Checklist
- Todos os componentes usam
--md-sys-color-*, não hex - Dark mode via
data-theme - Type scale aplicado (não font-size solto)
- Ícones = Material Symbols
- Touch targets ≥ 48px (padrão Android)
prefers-reduced-motionrespeitado
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