:root {
    color-scheme: dark;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: linear-gradient(135deg, #1a0a2e 0%, #16213e 25%, #2d1b4e 50%, #1a0a2e 75%, #0f0520 100%);
    color: #f4f4f4;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 32px 16px;
    position: relative;
    overflow: hidden;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px),
        radial-gradient(circle, white 1px, transparent 1px);
    background-size:
        200px 200px,
        300px 300px,
        250px 250px,
        350px 350px,
        280px 280px,
        320px 320px,
        270px 270px,
        310px 310px,
        290px 290px,
        330px 330px,
        260px 260px,
        340px 340px,
        300px 300px,
        250px 250px,
        320px 320px;
    background-position:
        0 0,
        40px 60px,
        130px 270px,
        70px 100px,
        150px 140px,
        90px 10px,
        130px 80px,
        0 140px,
        90px 210px,
        130px 60px,
        70px 240px,
        150px 0,
        50px 50px,
        100px 100px,
        200px 50px;
    pointer-events: none;
    z-index: 0;
    animation: twinkle 6s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

.page {
    width: min(720px, 100%);
    text-align: center;
    position: relative;
    z-index: 1;
}

.header h1 {
    margin-bottom: 8px;
}

.header p {
    color: #c7c7c7;
    margin-top: 0;
}

.game-card {
    margin-top: 32px;
    background: transparent;
    border-radius: 20px;
    padding: 32px;
    box-shadow: none;
}

.ball {
    width: 340px;
    height: 340px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.3), transparent 40%),
        radial-gradient(circle at 50% 60%, #1a1a1a 0%, #050505 65%, #000000 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    font-size: 1.1rem;
    text-align: center;
    border: 8px solid #0b0b0b;
    box-shadow:
        inset -30px -35px 50px rgba(0, 0, 0, 0.8),
        inset 15px 15px 40px rgba(255, 255, 255, 0.08),
        0 25px 60px rgba(0, 0, 0, 0.8);
    position: relative;
    overflow: hidden;
}

.ball::after {
    content: "";
    position: absolute;
    top: 25px;
    left: 40px;
    width: 100px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    filter: blur(3px);
}

.ball-inner {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle at 50% 40%, #ffffff, #dfeeff 55%, #b7d4ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #1b1b1b;
    font-weight: 700;
    text-transform: none;
    position: relative;
    box-shadow:
        0 0 35px rgba(64, 140, 255, 0.85),
        0 0 70px rgba(64, 140, 255, 0.55),
        inset 0 15px 30px rgba(255, 255, 255, 0.9);
    animation: glowPulse 2.4s ease-in-out infinite;
}

.ball-inner #placeholder {
    font-size: 5.2rem;
    color: #0d1b3f;
    text-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
    position: absolute;
}

.ball-inner #answer {
    font-size: 1rem;
    padding: 0 12px;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.ball.show-answer #answer {
    opacity: 1;
    transform: scale(1);
}

.ball.show-answer #placeholder {
    opacity: 0.08;
}

.ball.shake {
    animation: shake 0.6s ease-in-out;
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow:
            0 0 25px rgba(64, 140, 255, 0.75),
            0 0 50px rgba(64, 140, 255, 0.45),
            inset 0 10px 20px rgba(255, 255, 255, 0.9);
    }
    50% {
        box-shadow:
            0 0 35px rgba(64, 140, 255, 0.9),
            0 0 70px rgba(64, 140, 255, 0.7),
            inset 0 10px 20px rgba(255, 255, 255, 0.95);
    }
}

@keyframes shake {
    0% { transform: translateX(0) rotate(0deg); }
    15% { transform: translateX(-8px) rotate(-3deg); }
    30% { transform: translateX(8px) rotate(3deg); }
    45% { transform: translateX(-6px) rotate(-2deg); }
    60% { transform: translateX(6px) rotate(2deg); }
    75% { transform: translateX(-4px) rotate(-1deg); }
    100% { transform: translateX(0) rotate(0deg); }
}

.controls {
    display: grid;
    gap: 12px;
}

.label {
    font-weight: 600;
    text-align: left;
}

input {
    padding: 12px 14px;
    border-radius: 10px;
    border: none;
    font-size: 1rem;
}

.button {
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    background: #7b2ff7;
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.button:hover {
    background: #9a5bff;
    transform: translateY(-2px);
}

.footer {
    margin-top: 24px;
}

.back {
    color: #bfa7ff;
    text-decoration: none;
}

.back:hover {
    text-decoration: underline;
}