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

body {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #000;
    position: fixed;
    top: 0;
    left: 0;
}

.video-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

#santaVideo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.overlay {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.greet-button {
    position: relative;
    padding: 20px 50px;
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #c41e3a 0%, #8b0000 100%);
    border: 4px solid #ffd700;
    border-radius: 50px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 
        0 8px 25px rgba(196, 30, 58, 0.6),
        0 0 40px rgba(255, 215, 0, 0.4),
        inset 0 2px 10px rgba(255, 255, 255, 0.3);
    pointer-events: all;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.greet-button:hover {
    transform: scale(1.1);
    box-shadow: 
        0 12px 35px rgba(196, 30, 58, 0.8),
        0 0 60px rgba(255, 215, 0, 0.6),
        inset 0 2px 15px rgba(255, 255, 255, 0.4);
    border-color: #ffed4e;
}

.greet-button:active {
    transform: scale(0.95);
    box-shadow: 
        0 4px 15px rgba(196, 30, 58, 0.5),
        0 0 30px rgba(255, 215, 0, 0.3);
}

.button-text {
    position: relative;
    z-index: 2;
    display: block;
}

.button-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.greet-button:hover .button-shine {
    left: 100%;
}

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

.snowflake {
    position: absolute;
    color: #fff;
    font-size: 20px;
    opacity: 0;
    animation: fall 3s linear infinite;
}

.snowflake:nth-child(1) {
    left: 20%;
    animation-delay: 0s;
}

.snowflake:nth-child(2) {
    left: 50%;
    animation-delay: 1s;
}

.snowflake:nth-child(3) {
    left: 80%;
    animation-delay: 2s;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes fall {
    0% {
        top: -20px;
        opacity: 1;
    }
    100% {
        top: 100%;
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .greet-button {
        padding: 18px 40px;
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .greet-button {
        padding: 15px 35px;
        font-size: 18px;
    }
}