/* =============================================================================
   CALIBRATION SCREEN STYLES
   ============================================================================= */

.calibration-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calibration-container {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 40px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.calibration-container h1 {
    font-size: 3em;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.calibration-instructions {
    margin: 30px 0;
}

.calibration-instructions p {
    font-size: 1.8em;
    line-height: 1.6;
    margin: 15px 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.calibration-arrow {
    font-size: 10em;
    margin: 40px 0;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.7;
    }
}

.calibration-status {
    font-size: 1.5em;
    margin: 20px 0;
    min-height: 40px;
    color: #ffeb3b;
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
}

.calibration-btn {
    font-size: 1.8em;
    padding: 20px 50px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    font-weight: bold;
}

.calibration-btn:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.4);
}

.calibration-btn:active {
    transform: translateY(0);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

.calibration-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
}

/* Arrow directions */
.arrow-up::before {
    content: '↑';
}

.arrow-down::before {
    content: '↓';
}

.arrow-left::before {
    content: '←';
}

.arrow-right::before {
    content: '→';
}