:root { --cor-bg: #1B3B22; --cor-texto: #FFFFFF; }
body { background: #f0f2f5; display: flex; justify-content: center; min-height: 100vh; margin: 0; }
.app-container { background-color: var(--cor-bg); width: 100%; max-width: 410px; min-height: 100vh; padding: 20px; display: flex; flex-direction: column; }
.header { color: var(--cor-texto); text-align: center; margin-top: 40px; }
.botoes-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; margin-top: 30px; }
.btn { background: white; padding: 20px; border-radius: 10px; text-align: center; color: #1B3B22; font-weight: bold; text-decoration: none; }