* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 4rem;
    padding-bottom: 4rem;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    background-color: #16213e;
    background-attachment: fixed;
    font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
}

main {
    text-align: left;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.sinaasappel {
    font-size: 6rem;
    animation: zwaaien 1s ease-in-out infinite;
    transform-origin: bottom center;
    filter: drop-shadow(0 0 20px rgba(255, 154, 86, 0.4));
}

@keyframes zwaaien {
    0%, 100% {
        transform: rotate(-15deg) translateY(0);
    }
    25% {
        transform: rotate(0deg) translateY(-30px);
    }
    50% {
        transform: rotate(15deg) translateY(0);
    }
    75% {
        transform: rotate(0deg) translateY(-30px);
    }
}

h1 {
    color: #f0f0f0;
    font-size: 1.8rem;
    font-weight: 600;
    margin-top: 1.5rem;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, #fff 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

p {
    color: #888;
    font-size: 0.95rem;
    margin-top: 0.75rem;
    letter-spacing: 0.3px;
}

.groep {
    margin-top: 2rem;
}

.groep h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #b0b0b0;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.groep h2 .material-symbols-outlined {
    font-size: 1.2rem;
    color: #67e8f9;
}

.uitdagingen {
    list-style: none;
    text-align: left;
}

.uitdagingen li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #e0e0e0;
    font-size: 0.9rem;
    padding: 1rem 1.2rem;
    margin: 0.5rem 0;
    background:
        linear-gradient(90deg, rgba(103, 232, 249, 0.15) var(--progress), transparent var(--progress)),
        rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.uitdagingen li:hover {
    background:
        linear-gradient(90deg, rgba(103, 232, 249, 0.25) var(--progress), transparent var(--progress)),
        rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateX(4px);
}

.uitdagingen li .challenge {
    flex: 1;
}

.uitdagingen li .percentage {
    color: #67e8f9;
    font-weight: 600;
    margin-left: 1rem;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: #1a1a2e;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: #fff;
}

.modal h3 {
    color: #f0f0f0;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-right: 2rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 2rem 0;
}

.empty-state .material-symbols-outlined {
    font-size: 4rem;
    color: #444;
    margin-bottom: 1rem;
}

.empty-state p {
    color: #888;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.empty-state .empty-hint {
    color: #555;
    font-size: 0.85rem;
}

/* Progress State */
.progress-state {
    padding: 1rem 0;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #67e8f9, #10b981);
    border-radius: 6px;
    transition: width 0.5s ease;
}

.progress-text {
    color: #67e8f9;
    font-size: 1rem;
    margin-top: 1rem;
    text-align: center;
}

.score-screenshot {
    width: 100%;
    border-radius: 12px;
}