html, body {
    margin: 0;
    padding: 0;
}

#countdown-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    color: #fff;
    background: linear-gradient(135deg, #1a3a32 0%, #227d4e 100%);
    font-family: 'Poppins', sans-serif;
    padding: 20px;
    box-sizing: border-box;
}

h1 {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 1px;
    animation: fadeIn 1s ease-out;
}

#countdown {
    display: flex;
    gap: 20px;
    font-size: 2em;
    font-weight: 600;
    width: 100%;
    max-width: 600px;
    justify-content: space-around;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.4);
    border-radius: 15px;
    min-width: 80px;
    box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideIn 0.7s cubic-bezier(0.36, 0, 0, 1) both;
    box-sizing: border-box;
}

.countdown-value {
    font-size: 2.5em;
    line-height: 1;
    transition: transform 0.3s ease-in-out;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
    min-width: 1em;
    text-align: center;
    display: block;
    width: 2ch;
    font-variant-numeric: tabular-nums;
}

.countdown-value.animate {
    transform: scale(1.1) translateY(-5px);
}

.countdown-label {
    font-size: 0.8em;
    color: #eee;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-15px); }
    to { opacity: 1; transform: translateX(0); }
}

@media (min-width: 768px) {
    h1 {
        font-size: 2.5em;
        margin-bottom: 40px;
        letter-spacing: 2px;
    }

    #countdown {
        font-size: 3em;
        gap: 50px;
        max-width: none;
    }

    .countdown-item {
        padding: 40px;
        min-width: 120px;
        border-radius: 20px;
        box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.6);
    }

    .countdown-value {
        font-size: 2em;
    }

    .countdown-label {
        font-size: 0.7em;
        margin-top: 15px;
        letter-spacing: 1px;
    }
}

@media (min-width: 1200px) {
    h1 {
        font-size: 3em;
    }

    #countdown {
        font-size: 2.5em;
        gap: 60px;
    }

    .countdown-item {
        padding: 50px;
    }

    .countdown-value {
        font-size: 3em;
    }

    .countdown-label {
        font-size: 1.1em;
    }
}

@media (min-width: 1440px) {
    h1 {
        font-size: 4em;
    }

    #countdown {
        font-size: 3.5em;
        gap: 60px;
    }

    .countdown-item {
        padding: 50px;
    }

    .countdown-value {
        font-size: 4em;
    }

    .countdown-label {
        font-size: 1.1em;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2em;
        margin-bottom: 20px;
    }

    #countdown {
        font-size: 1.5em;
        gap: 10px;
    }

    .countdown-item {
        padding: 15px;
        min-width: 60px;
        border-radius: 10px;
    }

    .countdown-value {
        font-size: 2em;
    }

    .countdown-label {
        font-size: 0.7em;
        margin-top: 8px;
    }
}