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

body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f8ff;
    color: #333;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

#fireworks-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    display: none;
}

.fireworks-active #fireworks-canvas {
    display: block;
}

.fireworks-active {
    background-color: #000;
}

.fireworks-active .container {
    background-color: rgba(255, 255, 255, 0.8);
}

.fireworks-active #expired-message {
    color: #ff3b00;
    text-shadow: 0 0 10px rgba(255, 59, 0, 0.5);
}

.container {
    text-align: center;
    padding: 2rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    width: 90%;
    z-index: 1;
}

h1 {
    margin-bottom: 2rem;
    color: #2c3e50;
    font-size: 2.5rem;
}

.countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2rem 0;
}

.time-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 0.5rem;
}

.time-value {
    font-size: 3.5rem;
    font-weight: bold;
    background-color: #2c3e50;
    color: white;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    min-width: 120px;
}

.time-label {
    margin-top: 0.5rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #7f8c8d;
}

.separator {
    font-size: 3.5rem;
    font-weight: bold;
    color: #2c3e50;
    margin: 0 0.25rem;
    align-self: flex-start;
    padding-top: 0.5rem;
}

#expired-message {
    font-size: 2rem;
    font-weight: bold;
    color: #e74c3c;
    margin: 2rem 0;
}

.hidden {
    display: none;
}

.target-date-container {
    font-size: 1.2rem;
    color: #7f8c8d;
    margin-top: 2rem;
}

#target-date {
    font-weight: bold;
    color: #3498db;
}

@media (max-width: 768px) {
    .countdown {
        flex-wrap: wrap;
    }

    h1 {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }

    .time-value {
        font-size: 2rem;
        min-width: 70px;
        padding: 0.4rem 0.7rem;
    }

    .separator {
        font-size: 2rem;
    }

    .time-section {
        margin: 0.3rem;
    }

    .time-label {
        font-size: 0.8rem;
    }

    #expired-message {
        font-size: 1.5rem;
    }

    .target-date-container {
        font-size: 1rem;
    }

    .container {
        padding: 1.5rem;
        width: 95%;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }

    .time-value {
        font-size: 1.6rem;
        min-width: 60px;
        padding: 0.3rem 0.5rem;
    }

    .separator {
        font-size: 1.6rem;
        margin: 0 0.1rem;
    }

    .time-section {
        margin: 0.2rem;
    }

    .time-label {
        font-size: 0.7rem;
        margin-top: 0.3rem;
    }
}