@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&family=Noto+Sans+Sinhala:wght@400&display=swap');

:root {
    --primary-gradient: linear-gradient(#8E54E9, #4776E6);
    --bg-color: #9053c7;
    --white: #ffffff;
    --text-gray: #999999;
    --input-bg: #eeeeee;
    --success-color: #57b846;
    --success-bg: #d4edda;
    --success-border: #c3e6cb;
    --success-text: #155724;
    --info-color: #1161e2;
    --danger-bg: #f8d7da;
    --danger-border: #f5c6cb;
    --danger-text: #721c24;
}

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

html {
    font-size: 62.5%; /* 1rem = 10px */
    font-family: 'Montserrat', sans-serif;
}

body {
    background: var(--bg-color);
    background: var(--primary-gradient);
    width: 100%;
    min-height: 100vh;
    padding: 1.5rem;
}

.box-container {
    width: clamp(24rem, 100%, 30rem);
    border-radius: 1rem;
    background-color: var(--white);
    padding: 2rem;
    margin: 0 auto;
}

.box-container section {
    width: 100%;
}

.box-container .img-container {
    padding: 1rem;
}

.box-container img {
    display: block;
    width: 100%;
    height: 100%;
}

.box-container .form-section form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.box-container .form-section form > *:not(:last-child) {
    margin-bottom: 2rem;
}

.box-container span {
    display: block;
    text-align: center;
}

#charging {
    font-size: 8px;
    color: var(--text-gray);
}

.form-title, .alert-success {
    font-size: 2rem;
}

.form-text {
    font-size: 1.6rem;
    font-family: 'Noto Sans Sinhala', sans-serif;
}

#smsLink {
    display: inline-block;
    width: 20rem;
    height: 4rem;
    line-height: 4rem;
    background: var(--info-color);
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    text-align: center;
    border-radius: 2.5rem;
    text-decoration: none;
    letter-spacing: 1.5px;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

#smsLink:hover,
#smsLink:focus {
    background: #0050d0;
    text-decoration: none;
}

.box-container input {
    outline: none;
    border: 2px solid transparent;
    display: block;
    width: 20rem;
    height: 4rem;
    font-size: 1.5rem;
    background-color: var(--input-bg);
    border-radius: 2.5rem;
    line-height: 1.5;
    padding: 0 4rem;
    font-family: 'Montserrat', sans-serif;
    letter-spacing: 1.5px;
    text-align: center;
    transition: all 0.3s ease;
}

.box-container input:focus {
    border-color: var(--bg-color);
    box-shadow: 0 0 5px rgba(144, 83, 199, 0.5);
}

.box-container input[type=submit] {
    color: var(--white);
    text-transform: uppercase;
    background: var(--success-color);
    font-weight: 700;
    margin-bottom: 2rem;
    cursor: pointer;
}

.box-container input[type=submit]:hover,
.box-container input[type=submit]:focus {
    background: #4cae4c; /* Slightly darker green for hover/focus */
    border-color: transparent;
}

.box-container a {
    cursor: pointer;
    text-decoration: none;
    color: var(--info-color);
}

.box-container a:hover,
.box-container a:focus {
    text-decoration: underline;
}

.alert-success {
    color: var(--success-text);
    background-color: var(--success-bg);
    border-color: var(--success-border);
}

.alert-danger {
    color: var(--danger-text);
    background-color: var(--danger-bg);
    border-color: var(--danger-border);
}

.alert {
    padding: .75rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: .25rem;
    text-align: center;
}

@media screen and (min-width: 400px) {
    html {
        font-size: 75%; /* 12px */
    }
}

@media screen and (min-width: 500px) {
    html {
        font-size: 87.5%; /* 14px */
    }
}

@media screen and (min-width: 700px) {
    html {
        font-size: 100%; /* 16px */
    }
}

@media only screen and (min-width: 800px) {
    html {
        font-size: 87.5%; /* 14px */
    }

    body {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .box-container {
        width: 100%;
        max-width: 60rem;
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr auto;
        grid-template-areas: "left right-top" "left right-bottom";
    }

    section.img-section {
        grid-area: left;
    }

    .form-section {
        padding: 1rem;
        grid-area: right-top;
        display: grid;
        place-items: center;
    }

    #charging {
        grid-area: right-bottom;
    }

    .box-container img {
        max-width: 35rem;
    }

    .align-self-md-center {
        align-self: center;
    }
}

@media only screen and (max-width: 800px) {
    .box-container > *:not(:last-child) {
        margin-bottom: 2rem;
    }
}