:root {
    --quantum-space: #0D1B2A;
    --energy-white: #FFFFFF;
    --strength-red: #F44336;
    --endurance-blue: #2196F3;
    --quantum-glow: rgba(33, 150, 243, 0.5);
}

body {
    background-color: var(--quantum-space);
    color: var(--energy-white);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.top-bar {
    background-color: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar {
    background-color: rgba(13, 27, 42, 0.95);
    backdrop-filter: blur(10px);
}

.hero-section {
    min-height: 80vh;
    background: radial-gradient(circle at center, #1b2d42 0%, var(--quantum-space) 70%);
    position: relative;
    overflow: hidden;
}

.card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--energy-white);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--quantum-glow);
}

.btn-primary {
    background-color: var(--endurance-blue);
    border-color: var(--endurance-blue);
    box-shadow: 0 0 15px var(--quantum-glow);
}

.btn-primary:hover {
    background-color: #1976D2;
    border-color: #1976D2;
    box-shadow: 0 0 25px var(--quantum-glow);
}

.quantum-dumbbell {
    width: 120px;
    height: 40px;
    background: linear-gradient(90deg, var(--strength-red), var(--endurance-blue));
    border-radius: 20px;
    margin: 0 auto;
    position: relative;
    animation: superposition 3s infinite ease-in-out;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.quantum-dumbbell::before,
.quantum-dumbbell::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background: inherit;
    opacity: 0.5;
    filter: blur(5px);
    animation: ghosting 3s infinite ease-in-out;
}

.quantum-dumbbell::after {
    animation-delay: 0.1s;
    filter: blur(10px);
    opacity: 0.3;
}

@keyframes superposition {

    0%,
    100% {
        transform: scale(1) translateX(0);
        filter: hue-rotate(0deg);
    }

    25% {
        transform: scale(1.1) translateX(-10px);
    }

    75% {
        transform: scale(1.1) translateX(10px);
    }
}

@keyframes ghosting {

    0%,
    100% {
        transform: scale(1) translateX(0);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.2) translateX(0);
        opacity: 0.2;
    }
}

footer {
    background-color: rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.copyright-link {
    color: var(--endurance-blue);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    text-shadow: 0 0 10px var(--quantum-glow);
    padding: 2px 4px;
    border-radius: 3px;
}

.copyright-link:hover {
    color: var(--energy-white);
    background-color: var(--endurance-blue);
    box-shadow: 0 0 15px var(--quantum-glow);
    text-shadow: none;
}

/* Canvas styling */
#probabilityVisualizer {
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    width: 100%;
    max-width: 600px;
}