/**
 * Eye Tracker Styles
 * Full-screen tracking interface styles
 */

/* Tracker Container */
.tracker-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 500px;
    background: var(--color-bg);
}

/* Header */
.tracker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
    flex-shrink: 0;
}

.tracker-back {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-light);
    font-weight: 500;
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.back-arrow {
    font-size: 1.25rem;
}

.tracker-title {
    text-align: center;
}

.tracker-title h2 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: 0;
}

.tracker-status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.tracker-status.calibrating {
    background: var(--color-warning);
    color: white;
    animation: pulse 1.5s infinite;
}

.tracker-controls {
    display: flex;
    gap: var(--spacing-sm);
}

/* Viewport */
.tracker-viewport {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* Stats Panel */
.tracker-stats {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(30, 58, 95, 0.95);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    min-width: 180px;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item:last-child {
    border-bottom: none;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    font-family: 'SF Mono', 'Monaco', monospace;
}

/* Gaze Dot */
.gaze-dot {
    position: absolute;
    width: 24px;
    height: 24px;
    background: var(--color-accent);
    border: 3px solid white;
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 1000;
    box-shadow:
        0 0 0 4px rgba(232, 90, 51, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.gaze-dot.visible {
    opacity: 1;
}

.gaze-dot.invalid {
    background: var(--color-text-muted);
    box-shadow:
        0 0 0 4px rgba(173, 181, 189, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Instructions */
.tracker-instructions {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 50;
}

.instruction-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 400px;
}

.instruction-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.instruction-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.instruction-card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.instruction-list {
    text-align: left;
    list-style: none;
    padding: 0;
}

.instruction-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.instruction-list li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

/* Calibration Overlay */
.calibration-overlay {
    position: absolute;
    inset: 0;
    background: rgba(30, 58, 95, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.calibration-overlay.hidden {
    display: none;
}

.calibration-message {
    text-align: center;
    color: white;
}

.calibration-message h3 {
    color: white;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.calibration-message p {
    color: rgba(255, 255, 255, 0.8);
}

/* Spinner */
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .tracker-header {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }

    .tracker-title {
        order: -1;
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    .tracker-stats {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        min-width: 150px;
        padding: var(--spacing-sm);
    }

    .stat-label {
        font-size: 0.65rem;
    }

    .stat-value {
        font-size: var(--font-size-xs);
    }

    .instruction-card {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }
}