@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #3a0ca3;
    --success: #4cc9f0;
    --warning: #f72585;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --surface: #ffffff;
    --surface-2: #f0f2f5;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease-in-out;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--surface-2);
    color: var(--dark);
    line-height: 1.5;
}

.container {
    text-align: center;
    max-width: 900px;
    width: 100%;
    padding: 24px;
    background-color: var(--surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin: 20px;
}

header {
    margin-bottom: 24px;
}

h1 {
    color: var(--secondary);
    margin-bottom: 10px;
    font-weight: 700;
    font-size: 2.2rem;
    position: relative;
    display: inline-block;
}

h1::after {
    content: '';
    position: absolute;
    width: 60%;
    height: 4px;
    background-color: var(--primary);
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.app-subtitle {
    color: var(--gray);
    font-size: 1rem;
    margin-top: 5px;
    font-weight: 500;
}

.mode-selector {
    margin-bottom: 28px;
}

.mode-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.mode-description-container {
    text-align: center;
    margin-bottom: 24px;
}

.mode-selector button {
    background-color: var(--surface-2);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    color: var(--dark);
    position: relative;
    overflow: hidden;
    z-index: 1;
    white-space: nowrap;
    min-width: 160px;
    box-shadow: var(--shadow-sm);
}

.mode-selector button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.mode-description {
    text-align: center;
    margin: 0 auto;
    font-size: 14px;
    color: var(--gray);
    max-width: 500px;
    transition: opacity 0.3s ease;
}

.mode-description.hidden {
    display: none;
}

.mode-selector button.active {
    background-color: transparent;
    color: white;
}

.mode-selector button.active::before {
    opacity: 1;
}

.mode-selector button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 640px;
    margin: 0 auto 24px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background-color: #000;
    border: 3px solid var(--surface);
    transition: var(--transition);
    aspect-ratio: 4/3;
}

video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transform: rotateY(180deg); /* Mirror video horizontally */
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    transform: rotateY(180deg); /* Mirror canvas to match video */
}

#detection-info {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.count-display {
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.9), rgba(58, 12, 163, 0.9));
    color: white;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 0;
    transition: var(--transition);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.3s ease-out;
}

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

.hidden {
    display: none;
}

.controls {
    margin-top: 28px;
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.controls button {
    background-color: var(--success);
    color: var(--dark);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 150px;
}

#reset-btn::before {
    content: '↻';
    margin-right: 8px;
    font-size: 18px;
}

#toggle-camera-btn::before {
    content: '⏸️';
    margin-right: 8px;
    font-size: 18px;
}

#toggle-camera-btn.paused::before {
    content: '▶️';
}

.controls button:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.status-overlay {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    z-index: 20;
    text-align: center;
    max-width: 80%;
    transition: opacity 0.3s ease;
    /* Make overlay always visible by default */
    opacity: 1;
    visibility: visible;
}

.status::before {
    content: '';
    position: absolute;
    height: 4px;
    top: 0;
    left: 0;
    background: linear-gradient(90deg, var(--primary), var(--success));
    animation: loadingBar 2s infinite linear;
    width: 100%;
    transform-origin: left;
}

@keyframes loadingBar {
    0% { transform: scaleX(0); }
    50% { transform: scaleX(1); }
    100% { transform: scaleX(0); }
}

/* Set appropriate dimensions for video container */
.video-container::before {
    content: "";
    display: block;
    padding-top: 75%; /* 4:3 aspect ratio */
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 12px;
        margin: 8px;
        border-radius: var(--radius-sm);
    }
    
    header {
        margin-bottom: 12px;
    }
    
    .app-subtitle {
        font-size: 0.9rem;
        margin-top: 2px;
    }
    
    .mode-buttons {
        gap: 8px;
        margin-bottom: 8px;
    }
    
    .mode-selector button {
        padding: 8px 16px;
        min-width: 120px;
        font-size: 14px;
    }
    
    .mode-description {
        font-size: 12px;
        margin-bottom: 8px;
    }
    
    .mode-description-container {
        margin-bottom: 12px;
    }
    
    .mode-selector {
        margin-bottom: 14px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
}

/* Optimize video container for mobile */
@media (max-width: 768px) {
    .video-container {
        max-width: 100%;
        margin: 0 auto 12px;
        border-radius: var(--radius-md);
        border-width: 2px;
        aspect-ratio: 3/4; /* Taller aspect ratio for mobile */
    }
    
    #detection-info {
        bottom: 10px;
        left: 10px;
        gap: 5px;
    }
    
    .count-display {
        padding: 8px 12px;
        font-size: 14px;
        border-radius: var(--radius-sm);
    }
}

/* Feature-specific styles */
.face-shape-active .video-container {
    border-color: var(--primary);
}

.blink-active .video-container {
    border-color: var(--success);
}

.finger-active .video-container {
    border-color: var(--warning);
}

/* Animation for model loading */
.model-loading {
    position: relative;
    font-weight: 500;
    display: inline-block;
}

.model-loading::after {
    content: '.';
    animation: loadingDots 1.5s infinite;
    display: inline-block;
    width: 20px;
    text-align: left;
}

@keyframes loadingDots {
    0% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
    100% { content: '.'; }
}

/* Feature description styles */
.feature-description {
    margin-top: 32px;
    background-color: var(--surface-2);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    text-align: left;
}

.feature-description h3 {
    font-size: 1.2rem;
    color: var(--secondary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-description p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

.feature {
    opacity: 1;
    transition: var(--transition);
}

/* Scanner effect for camera */
.camera-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Scanner effect removed */

/* Value emphasis */
.count-display .value {
    font-weight: 700;
    color: white;
}

/* Mode-specific styling */
.count-display i {
    margin-right: 8px;
}