:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    --pending: #64748b;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

#app {
    max-width: 900px;
    width: 100%;
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #818cf8, #4f46e5);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 5px;
}

header p {
    color: var(--text-muted);
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 480px;
    aspect-ratio: 35 / 45;
    margin: 0 auto 30px;
    background-color: #000;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    border: 2px solid #334155;
}

#webcam {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: scaleX(-1);
}

.silhouette {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    border: 2px dashed rgba(255, 255, 255, 0.5);
    border-radius: 50% 50% 40% 40%;
    opacity: 0.6;
}

.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.primary-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.primary-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.primary-btn:disabled {
    background-color: #334155;
    cursor: not-allowed;
    opacity: 0.5;
}

.secondary-btn {
    background-color: #334155;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
}

.feedback-panel {
    background-color: rgba(15, 23, 42, 0.5);
    padding: 20px;
    border-radius: 12px;
}

.feedback-panel h3 {
    margin-bottom: 15px;
    font-size: 1.1rem;
    color: var(--text-muted);
}

#validation-list {
    list-style: none;
}

#validation-list li {
    padding: 8px 0;
    padding-left: 30px;
    position: relative;
    font-weight: 500;
    transition: color 0.3s;
}

#validation-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.pending::before { background-color: var(--pending); }
.success::before { background-color: var(--success); }
.error::before { background-color: var(--error); }
.warning::before { background-color: var(--warning); }

.success { color: var(--success); }
.error { color: var(--error); }
.warning { color: var(--warning); }

.hidden { display: none; }

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.5s;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #334155;
    border-top: 5px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.result-container {
    text-align: center;
    margin-top: 20px;
}

#photo-result {
    max-width: 100%;
    border-radius: 12px;
    margin-bottom: 20px;
}