:root {
    --bg-color: #FFF8E1;
    --card-bg: #FFFFFF;
    --primary-color: #FF9800; /* Orange */
    --primary-hover: #F57C00;
    --secondary-color: #8D6E63; /* Brownish */
    --secondary-hover: #6D4C41;
    --accent-color: #FFEB3B; /* Yellow */
    --success-color: #66BB6A;
    --error-color: #EF5350;
    --text-color: #3E2723;
    --subtext-color: #6D4C41;
    --font-main: 'Fredoka', sans-serif;
    --shadow: 0 4px 12px rgba(62, 39, 35, 0.15);
    --border-radius: 20px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    /* Polka dot pattern for "leopard spots" */
    background-image: radial-gradient(#FFCC80 15%, transparent 16%), radial-gradient(#FFCC80 15%, transparent 16%);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    color: var(--text-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    background-color: var(--card-bg);
    width: 90%;
    max-width: 600px;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(62, 39, 35, 0.2);
    padding: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 4px solid var(--primary-color);
}

header h1 {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    text-shadow: 1px 1px 0px #FFE0B2;
}

#score-board {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    background: #FFF3E0;
    display: inline-block;
    padding: 5px 15px;
    border-radius: 15px;
}

.screen {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.screen.active {
    display: block;
}

h2 {
    color: var(--text-color);
    font-size: 1.8rem;
}

h3 {
    font-size: 1.6rem;
    margin: 1.5rem 0;
    color: var(--text-color);
}

p {
    font-size: 1.2rem;
    color: var(--subtext-color);
}

.btn {
    border: none;
    padding: 14px 28px;
    font-size: 1.2rem;
    font-family: var(--font-main);
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 1rem;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn:active {
    transform: translateY(1px);
}

.primary {
    background-color: var(--primary-color);
}
.primary:hover {
    background-color: var(--primary-hover);
}

.secondary {
    background-color: var(--secondary-color);
}
.secondary:hover {
    background-color: var(--secondary-hover);
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
}

@media (min-width: 500px) {
    .options-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.option-btn {
    background-color: #FFF3E0;
    border: 3px solid #FFCC80;
    border-radius: 15px;
    padding: 15px;
    font-size: 1.1rem;
    font-family: var(--font-main);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-color);
    font-weight: 500;
}

.option-btn:hover:not(:disabled) {
    background-color: #FFE0B2;
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.option-btn.correct {
    background-color: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.option-btn.wrong {
    background-color: var(--error-color);
    color: white;
    border-color: var(--error-color);
    animation: shake 0.5s;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background-color: #EEE;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1rem;
}

#progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
}

.category-tag {
    display: inline-block;
    padding: 5px 15px;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
    text-transform: uppercase;
}

.hidden {
    display: none !important;
}

footer {
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--subtext-color);
    opacity: 0.8;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
    100% { transform: translateX(0); }
}