/* Base body styles */
body {
    font-family: 'Inter', Arial, sans-serif;
    background-color: var(--bg-color);
    /* Nice blue gradient */
    min-height: 100vh;
    margin: 0;
    visibility: hidden;
}

/* Centering only the form wrapper */
.center-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    /* adjust if navbar height changes */
    padding: 1rem;
}

/* PIN form container */
.pin-wrapper {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    max-width: 450px;
    width: 100%;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.5s ease-out;
    border: 1px solid #e0e0e0;
}

/* Fade animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Optional logo */
.logo {
    display: block;
    margin: 0 auto 1.5rem;
    max-width: 120px;
    height: auto;
}

/* Form heading */
.pin-wrapper h2 {
    text-align: center;
    color: #2d3436;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 600;
}

/* Input field groups */
.input-group {
    margin-bottom: 1.2rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #636e72;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid #dfe6e9;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Submit button */
button[type="submit"] {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

button[type="submit"]:hover {
    background-color: var(--primary-color);
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Message display */
.message {
    margin-top: 1rem;
    text-align: center;
    font-weight: 500;
    color: #e74c3c;
}

.message.success {
    background-color: #dff9fb;
    color: var(--primary-color);
    padding: 0.5rem;
    border-radius: 6px;
}


/* Small devices - phones */
@media (max-width: 480px) {
    .pin-wrapper {
        max-width: 100%;
        padding: 1.5rem;
        border-radius: 12px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .pin-wrapper h2 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .input-group input {
        font-size: 0.9rem;
        padding: 0.6rem;
    }

    button[type="submit"] {
        font-size: 0.9rem;
        padding: 0.6rem;
    }
}

/* Medium devices - tablets */
@media (min-width: 481px) and (max-width: 768px) {
    .pin-wrapper {
        max-width: 400px;
        padding: 1.75rem;
    }

    .pin-wrapper h2 {
        font-size: 1.6rem;
    }

    .input-group input {
        font-size: 0.95rem;
        padding: 0.7rem;
    }

    button[type="submit"] {
        font-size: 0.95rem;
        padding: 0.7rem;
    }
}

/* Large devices - desktops */
@media (min-width: 1025px) {
    .pin-wrapper {
        max-width: 450px;
        padding: 2rem;
    }

    .pin-wrapper h2 {
        font-size: 1.8rem;
    }

    .input-group input {
        font-size: 1rem;
        padding: 0.75rem;
    }

    button[type="submit"] {
        font-size: 1rem;
        padding: 0.75rem;
    }
}