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

:root{
    font-family: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

    /* Surfaces */
    --color-bg: #F7F8FA;
    --color-surface: #FFFFFF;

    /* Text */
    --color-text-primary: #0F1318;
    --color-text-secondary: #4B5563;

    /* Accents */
    --color-accent: #B87107;
    --color-accent-contrast: #FFFFFF;

    /* Border */
    --color-border: #E5E7EB;

    /* shadow */
    --color-shadow: rgba(0, 0, 0, 0.25);

    /* Input */
    --color-input-focus: var(--color-accent);
    --color-input-invalid: #C6362B;
}

@media (prefers-color-scheme: dark) {
    :root{
        /* Surfaces */
        --color-bg: #0F1318;
        --color-surface: #161D26;
        
        /* Text */
        --color-text-primary: #E6E8EB;
        --color-text-secondary: #9AA4AE;
        
        /* Accents */
        --color-accent-contrast: #0F1318;
        
        /* Border */
        --color-border: #232A33;

        /* shadow */
        --color-shadow: rgba(255, 255, 255, 0.08);

        /* Input */
        --color-input-invalid: #E05A4F;
    }
}

body{
    color: var(--color-text-primary);
    background-color: var(--color-bg);
}


button{
    color: var(--color-accent-contrast);
    border: 0;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 12px 32px;
    border-radius: 8px;
    background-color: var(--color-accent);
    box-sizing: border-box;
}

button:hover{
    color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    background-color: var(--color-accent-contrast);
}

button:active{
    transform: scale(0.95);
}

a{
    color: var(--color-accent);
    font-weight: bold;
    text-decoration: none;
}

/* Layout structure */

main{
    display: flex;
    min-height: 100vh;
    width: min(100%, 1400px);
    margin: 0 auto;
    box-shadow: 0 0 12px 0 var(--color-shadow);
}

/* Hero image styling */

#hero-image{
    min-width: 35%;
    background-image: url(./assets/site-images/bg-image.jpg);
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;

    
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    color: #FFFFFF;
}

#hero-image a{
    color: inherit;
    text-decoration: underline;
}

#logo{
    font-size: 4rem;

    overflow: hidden;
    overflow-wrap: break-word;

    margin: 5rem 0;
    padding: 1rem 0;
    width: 100%;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.5);
}

#credits{
    font-size: 0.7rem;
    margin-bottom: 16px;
}

@media only screen  and (max-width: 1000px){
    #hero-image{
        display: none;
    }
}

/* Content layout */

#form-container{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    gap: 32px;
    padding: 32px 0;
}

#form-container > :not(button){
    padding: 0 32px;
}

#form-container > button{
    margin-left: 32px;
    flex: 0 0 auto;

    align-self: flex-start;
}

#form-container p.info{
    font-size: 1.4rem;
    line-height: 1.2;
    font-weight: 700;
}

form#sign-up-form{
    background-color: var(--color-surface);
    padding: 32px;
}

#sign-up-form fieldset{
    display: flex;
    flex-flow: row wrap;
    align-items: flex-start;
    gap: 40px;
     
    border: 0;
    margin: 16px 0;
}

#sign-up-form legend{
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1;
    overflow: hidden;
    clip: rect(0,0,0,0);
    clip-path: inset(50%);
    white-space: nowrap;
}

#sign-up-form .input-item{
    flex: 1;
}
.input-item > label{
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.125rem;
    color: var(--color-text-secondary);

    display: inline-block;
    margin-bottom: 4px;
}

.input-item > label, .input-item > input{
    width: 100%;
    min-width: min(100%, 200px);
}

.input-item > input[type="text"],
.input-item > input[type="email"],
.input-item > input[type="password"],
.input-item > input[type="tel"]
{
    border: 1px solid var(--color-border);
    border-radius: 4px;

    height: 32px;
    padding: 8px;
}

/* Validation */

.input-item > input[type="text"]:not(:placeholder-shown):invalid,
.input-item > input[type="email"]:not(:placeholder-shown):invalid,
.input-item > input[type="password"]:not(:placeholder-shown):invalid,
.input-item > input[type="tel"]:not(:placeholder-shown):invalid
{
    border: 1px solid var(--color-input-invalid);
}

.input-item > input[type="text"]:focus,
.input-item > input[type="email"]:focus,
.input-item > input[type="password"]:focus,
.input-item > input[type="tel"]:focus
{
    border: 0;
    outline: 3px solid var(--color-input-focus);
}