:root {
    --bg-color: #f4f4f9;
    --text-color: #333;
    --accent-color: #2c3e50;
    --circle-blue: #3498db;
    --circle-purple: #8E44AD;
    --square-orange: #e67e22;
    --square-yellow: #F1C40F;
    --reward-color: #27ae60;
    --no-reward-color: #c0392b;
}

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden; /* Prevent scrolling during experiment */
}

/* Screen Management */
.screen {
    display: none;
    height: 100vh;
    width: 100vw;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
}

.screen.active {
    display: flex;
}

.container {
    max-width: 600px;
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

/* Task Layouts */
#stimulus-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 100px;
    height: 400px;
    width: 100%;
    transition: all 0.5s ease-in-out;
}

/* Layout Orientations */
#stimulus-container.horizontal { flex-direction: row; }
#stimulus-container.vertical { flex-direction: column; }

/* Anchoring States */
#stimulus-container.anchor-up { transform: translateY(-50px); }
#stimulus-container.anchor-down { transform: translateY(50px); }
#stimulus-container.anchor-center { transform: translateY(0); }

/* Bandits */
.bandit {
    cursor: pointer;
    transition: transform 0.1s, filter 0.2s;
    width: 120px;
    height: 120px;
    flex: 0 0 120px;
}

.bandit:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.bandit:active {
    transform: scale(0.95);
}

/* Shapes */
.shape-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    clip-path: none;
}

.shape-square {
    width: 120px;
    height: 120px;
    border-radius: 0;
    clip-path: none;
}

.shape-triangle {
    width: 120px;
    height: 120px;
    border-radius: 0;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.shape-diamond {
    width: 120px;
    height: 120px;
    border-radius: 0;
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

/* Typography & UI */
h1 { margin-bottom: 20px; }
.instruction-box { text-align: left; margin-bottom: 30px; line-height: 1.6; }
.input-group { margin-bottom: 20px; }
input { padding: 10px; border-radius: 4px; border: 1px solid #ccc; width: 200px; }

.btn-primary, .btn-secondary {
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    margin: 5px;
}

.btn-primary { background: var(--accent-color); color: white; }
.btn-secondary { background: #95a5a6; color: white; }

/* Task Elements */
.fixation { font-size: 60px; color: #aaa; }
#feedback-area { height: 60px; margin-top: 20px; font-weight: bold; }
.reward { color: var(--reward-color); }
.no-reward { color: var(--no-reward-color); }

/* Summary Stats */
.summary-box { text-align: left; background: #eee; padding: 20px; border-radius: 8px; margin: 20px 0; }

/* Debug */
#debug-panel {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0,0,0,0.8);
    color: lime;
    padding: 10px;
    font-family: monospace;
    z-index: 1000;
}