/* ---------- Global Reset & Font ---------- */
* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

/* ---------- Page Background ---------- */
body {
    min-height: 100vh;
    background: linear-gradient(
        135deg,
        #dbeafe,   /* light blue */
        #bfdbfe,   /* soft blue */
        #e0e7ff,   /* lavender blue */
        #fbcfe8    /* soft pink */
    );
    background-attachment: fixed;
}

/* ---------- Main Container ---------- */
.container {
    width: 600px;
    margin: 90px auto;
    background-color: #ffffff;
    padding: 24px;
    border-radius: 14px;
    box-shadow: 0 15px 35px rgba(59, 130, 246, 0.25);
}

/* ---------- Headings ---------- */
h1 {
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: #1e293b;
    margin-bottom: 20px;
}

/* ---------- Form ---------- */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #1e293b;
}

/* ---------- Inputs ---------- */
input[type="text"],
input[type="date"] {
    width: 95%;
    padding: 10px;
    font-size: 16px;
    border-radius: 6px;
    border: 1px solid #c7d2fe;
    color: #1e293b;
}

input[type="text"]:focus,
input[type="date"]:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.45);
}

/* ---------- Button ---------- */
button {
    padding: 10px 22px;
    font-size: 16px;
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
}

/* ---------- Result Container ---------- */
.result-container {
    display: none;
    margin-top: 20px;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 8px 18px rgba(59, 130, 246, 0.2);
}

.result {
    margin-top: 10px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #e0e7ff;
}

.result-item:last-child {
    border-bottom: none;
}

.result h3 {
    font-size: 15px;
    font-weight: 500;
    color: #475569;
}

.result p {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
}

/* ---------- 🎉 Birthday Countdown ---------- */
#birthdayContainer {
    margin-top: 25px;
    padding: 18px;
    border-radius: 16px;
    background: linear-gradient(135deg, #ff9a9e, #fad0c4, #fbc2eb);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
    animation: popIn 0.6s ease-out;
}

#birthdayContainer h2 {
    text-align: center;
    font-size: 20px;
    margin-bottom: 15px;
    color: #2d1b69;
    letter-spacing: 0.5px;
}

/* Countdown layout */
#birthdayResult {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

/* Individual countdown boxes */
.bday-item {
    background: linear-gradient(135deg, #6a11cb, #2575fc);
    border-radius: 14px;
    padding: 14px 10px;
    text-align: center;
    color: #ffffff;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.bday-item:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.bday-item h4 {
    font-size: 13px;
    margin-bottom: 6px;
    opacity: 0.85;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.bday-item p {
    font-size: 22px;
    font-weight: 700;
}


@keyframes popIn {
    from {
        opacity: 0;
        transform: scale(0.85) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}


@media (max-width: 768px) {

    body {
        padding: 12px;
    }

    .container {
        width: 100%;
        margin: 40px auto;
        padding: 18px;
        border-radius: 12px;
    }

    h1 {
        font-size: 22px;
    }

    label {
        font-size: 14px;
    }

    input[type="text"],
    input[type="date"] {
        width: 100%;
        font-size: 15px;
    }

    button {
        width: 100%;
        padding: 12px;
        font-size: 15px;
    }

    .result-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .result-item h3 {
        font-size: 14px;
        margin-bottom: 4px;
    }

    .result-item p {
        font-size: 15px;
    }

    /* 🎂 Birthday countdown grid → 2 columns */
    #birthdayResult {
        grid-template-columns: repeat(2, 1fr);
    }

    .bday-item {
        padding: 12px 8px;
    }

    .bday-item p {
        font-size: 18px;
    }

    #birthdayContainer h2 {
        font-size: 18px;
    }
}

/* 📱 EXTRA SMALL PHONES */
@media (max-width: 420px) {

    h1 {
        font-size: 20px;
    }

    .bday-item p {
        font-size: 16px;
    }

    #birthdayResult {
        grid-template-columns: 1fr;
    }
}