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

body {
    font-family: 'Helvetica', Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
    background: #1a1a1a;
}

.container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

#backgroundCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.content {
    position: relative;
    z-index: 2;
    text-align: center;
    user-select: none;
}

.greeting-text {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    animation: pulse 3s ease-in-out infinite;
    transition: all 0.5s ease;
}

.time-display {
    font-size: 1.8rem;
    line-height: 1.6;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
    animation: float 4s ease-in-out infinite;
}

#day {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

#date {
    font-weight: 400;
    margin-bottom: 0.5rem;
}

#time {
    font-weight: 300;
    font-size: 2rem;
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes glow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}

/* Morning Theme */
.morning .greeting-text {
    color: #FF6347;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.morning .time-display {
    color: #2F4F4F;
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.3);
}

/* Afternoon Theme */
.afternoon .greeting-text {
    color: #FF8C00;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
}

.afternoon .time-display {
    color: #8B4513;
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.4);
}

/* Evening Theme */
.evening .greeting-text {
    color: #FF1493;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.evening .time-display {
    color: #F0E68C;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* Night Theme */
.night .greeting-text {
    color: #4169E1;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    animation: glow 2s ease-in-out infinite;
}

.night .time-display {
    color: #E6E6FA;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .greeting-text {
        font-size: 2.5rem;
    }
    
    .time-display {
        font-size: 1.4rem;
    }
    
    #time {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .greeting-text {
        font-size: 2rem;
    }
    
    .time-display {
        font-size: 1.2rem;
    }
    
    #time {
        font-size: 1.4rem;
    }
}