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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    background: url("../img/fundo.jpg") no-repeat center center;
    background-size: cover;
    color: #fff;
    position: relative;
}

.overlay {
    position: absolute;
    inset: 0;
    background: rgba(5, 20, 40, 0.8);
    z-index: 1;
}

header {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 60px 20px 30px;
}

header h1 {
    font-size: 36px;
}

header p {
    font-size: 18px;
    opacity: 0.9;
}

.emojis {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 25px;
    padding: 40px 40px;
}

button {
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 24px;
    color: #fff;
    font-size: 64px;
    padding: 30px 10px;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

button span {
    display: block;
    font-size: 18px;
    margin-top: 10px;
}

button:active {
    transform: scale(0.95);
    background: rgba(255,255,255,0.3);
}

.mensagem {
    position: absolute;
    inset: 0;
    background: rgba(5,20,40,0.9);
    z-index: 5;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    text-align: center;
}