* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    height: 100vh;
    background: linear-gradient(135deg, #667eea, #764ba2);
    overflow: hidden;
}

/* Hide video & canvas */
video, canvas {
    display: none;
}

/* Layout */
.container {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Welcome Screen */
.welcome-screen {
    text-align: center;
    color: white;
    animation: fadeIn 1s ease;
}

.welcome-content {
    padding: 2rem;
}

.smile-icon {
    font-size: 8rem;
    color: #FFD700;
    margin-bottom: 1.5rem;
    animation: bounce 2s infinite;
}

.welcome-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.welcome-message {
    font-size: 2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.simple-instruction {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 1.5rem 2rem;
    font-size: 1.2rem;
    background: rgba(255,255,255,0.15);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    animation: pulse 2s infinite;
}

.simple-instruction i {
    font-size: 1.8rem;
    color: #FFD700;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

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

/* Responsive */
@media (max-width: 768px) {
    .welcome-title { font-size: 3rem; }
    .welcome-message { font-size: 1.5rem; }
    .smile-icon { font-size: 6rem; }
}

@media (max-width: 480px) {
    .welcome-title { font-size: 2.5rem; }
    .welcome-message { font-size: 1.2rem; }
    .smile-icon { font-size: 5rem; }
}