:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --dark-color: #1b263b;
    --light-color: #f8f9fa;
    --success-color: #4cc9f0;
    --danger-color: #f72585;
    --warning-color: #f8961e;
    --info-color: #43aa8b;
    --border-radius: 12px;
    --box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', 'Segoe UI', sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    color: var(--dark-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

header {
    margin-bottom: 4rem;
    max-width: 800px;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
    animation: fadeIn 1s ease;
}

header p {
    font-size: 1.25rem;
    color: #4a5568;
    margin: 0 auto 2rem;
    max-width: 600px;
}

.mensagem {
    background-color: white;
    color: var(--dark-color);
    padding: 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: 3rem;
    box-shadow: var(--box-shadow);
    border-left: 5px solid var(--success-color);
    max-width: 600px;
    animation: slideDown 0.5s ease;
}

.opcoes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    width: 100%;
    max-width: 900px;
}

.btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    background-color: white;
    color: var(--dark-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
    height: 100%;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.btn:hover::before {
    opacity: 1;
}

.btn:hover {
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(67, 97, 238, 0.2);
}

.btn i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.btn:hover i {
    color: white;
    transform: scale(1.1);
}

.btn span {
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-cadastro {
    border: 2px solid var(--primary-color);
}

.btn-cadastro::before {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

.btn-login {
    border: 2px solid var(--success-color);
}

.btn-login::before {
    background: linear-gradient(135deg, var(--success-color), #3a86ff);
}

.btn-lojas {
    border: 2px solid var(--info-color);
}

.btn-lojas::before {
    background: linear-gradient(135deg, var(--info-color), #2a9d8f);
}

/* Ícones (usando Unicode ou pode substituir por ícones de fontes) */
.btn-cadastro::after {
    content: "📝";
    font-size: 2rem;
    margin-bottom: 1rem;
}

.btn-login::after {
    content: "🔑";
    font-size: 2rem;
    margin-bottom: 1rem;
}

.btn-lojas::after {
    content: "🛍️";
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Animações */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsividade */
@media (max-width: 768px) {
    .container {
        padding: 2rem 1.5rem;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
    
    header p {
        font-size: 1.1rem;
    }
    
    .opcoes {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 1.5rem;
    }
}