* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: #ffffff;
    background:
        radial-gradient(circle at top, rgba(255, 255, 255, 0.18), transparent 35%),
        linear-gradient(135deg, #0c2d57, #136a8a, #1f8f4d);
    min-height: 100vh;
}

.page {
    width: min(1100px, 94%);
    margin: 0 auto;
    padding: 30px 0;
}

.intro-card,
.game-card {
    background: rgba(5, 18, 36, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(8px);
}

.intro-card {
    text-align: center;
    margin-bottom: 24px;
}

h1 {
    margin: 0 0 10px;
    font-size: clamp(32px, 5vw, 56px);
    color: #ffd447;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 4px 0 rgba(0, 0, 0, 0.35);
}

.intro-card p {
    max-width: 760px;
    margin: 0 auto 20px;
    line-height: 1.5;
    color: #e9f5ff;
}

.selectors {
    display: grid;
    grid-template-columns: repeat(2, minmax(220px, 1fr));
    gap: 18px;
    margin: 22px 0;
}

.team-box {
    background: rgba(255, 255, 255, 0.09);
    border-radius: 18px;
    padding: 18px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    color: #ffd447;
}

select {
    width: 100%;
    padding: 12px 14px;
    border: 0;
    border-radius: 12px;
    font-size: 16px;
    outline: none;
}

.keys,
.hint {
    font-size: 14px;
    color: #cfe8ff;
}

button {
    border: 0;
    border-radius: 14px;
    padding: 13px 22px;
    background: #ffd447;
    color: #10203b;
    font-weight: 800;
    font-size: 16px;
    cursor: pointer;
    transition: 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
    background: #ffbf1f;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    align-items: center;
    margin-bottom: 16px;
}

.scoreboard {
    flex: 1;
    display: flex;
    justify-content: center;
    gap: 14px;
    align-items: center;
    background: #07172f;
    border-radius: 16px;
    padding: 13px;
    font-size: 20px;
}

.scoreboard strong {
    font-size: 34px;
    color: #ffd447;
}

.separator {
    opacity: 0.7;
}

canvas {
    width: 100%;
    display: block;
    border-radius: 18px;
    background: #4caf50;
    border: 4px solid rgba(255, 255, 255, 0.25);
}

.hint {
    margin-bottom: 0;
    text-align: center;
}

@media (max-width: 720px) {
    .selectors,
    .top-bar {
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .scoreboard {
        width: 100%;
        font-size: 16px;
        flex-wrap: wrap;
    }

    button {
        width: 100%;
    }
}