/* Custom properties - at root level for global access */
:root {
    --color-scheme: dark;

    --ff-content: "Source Sans Pro", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif;
    --ff-headings: "Oswald", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif;

    --lh: 1.6;

    --fs-900: clamp(2.5rem, 5vw + 1rem, 4rem);
    --fs-800: clamp(2rem, 4vw + 1rem, 3.5rem);
    --fs-700: clamp(1.5rem, 3vw + 1rem, 2.5rem);
    --fs-600: clamp(1.25rem, 2vw + 0.5rem, 1.75rem);
    --fs-500: 1.25rem;
    --fs-400: 1.2rem;
    --fs-300: .9rem;

    --clr-neutral-900: hsl(0, 0%,  7%);
    --clr-neutral-800: hsl(0, 0%, 10%);
    --clr-neutral-700: hsl(0, 0%, 15%);
    --clr-neutral-600: hsl(0, 0%, 20%);
    --clr-neutral-500: hsl(0, 0%, 25%);
    --clr-neutral-200: hsl(0, 0%, 90%);
    --clr-neutral-100: hsl(0, 0%, 95%);

    --clr-primary-400: hwb(0 100% 0%);
    --clr-primary-500: hsl(235, 100%, 65%);

    --clr-dark-background: #0A2D4D;
    --clr-light: #ffffff;
/*    --clr-secondary-background: #F6F5F3;*/
    --clr-secondary-background: var(--clr-dark-background);
    --clr-headings: #102A42;
    --clr-text-on-light: #2D3748;
    --clr-accent: #34516E;

    --clr-dark-background: #000000;
    --clr-light: hsl(0 0% 100%);
    --clr-secondary-background: var(--clr-neutral-900);
    --clr-headings: #000000;
    --clr-text-on-light: #000000;
    --clr-accent: hsl(205, 99%, 30%);

    --spacing-0: 0.25rem;
    --spacing-1: 0.5rem;
    --spacing-2: 1rem;
    --spacing-3: 1.5rem;
    --spacing-4: 2rem;
    --spacing-5: 3rem;
    --spacing-6: 4rem;

    --border-radius: 0.5rem;
    --container-max-width: 75rem;
    --container-padding: max(var(--spacing-2), 5vw);
    --header-height: 1rem;
}

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

html {
    color-scheme: var(--color-scheme);
    background-color: var(--clr-secondary-background);
}

body {
    margin: 0;
    font-family: var(--ff-content);
    font-size: var(--fs-400);
    line-height: var(--lh);
}

img {
    max-width: 100%;
    display: block;
}

h1,
h2 {
    font-family: var(--ff-headings);
    margin-top: 0;
}

h1 {
    font-size: var(--fs-700);
}

h2 {
    font-size: var(--fs-700);
}

a {
    color: var(--clr-accent);
    text-decoration: none;
}

a:hover,
a:focus {
    opacity: 0.75;
    transition: 0.2s;
}

.cta-button {
    display: inline-block;
    background-color: var(--clr-light);
    
    border: 1px solid var(--clr-accent);
    background-color: var(--clr-accent);
    color: var(--clr-light);
    cursor: pointer;

    text-decoration: none;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background-color 200ms ease-in-out;
}

.cta-button:hover,
.cta-button:focus {
    border-color: var(--clr-light);
    color: var(--clr-light);
    background-color: transparent;
    transition: 0.2s;
    opacity: 1;
}

.container {
    width: 80%;
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
    /* added for nav-toggle positioning */
}

header {
    background-color: var(--clr-dark-background);
    padding: 1.5em 0;
    text-align: center;
}

.nav {
    width: 100%;
}

.nav-toggle {
    cursor: pointer;
    border: 0;
    width: 3em;
    height: 3em;
    padding: 0em;
    border-radius: 50%;
    background: var(--clr-secondary-background);
    color: var(--clr-light);
    transition: opacity 250ms ease;

    position: absolute;
    left: 0;
}

.nav-toggle:focus,
.nav-toggle:hover {
    opacity: .75;
}

.hamburger {
    width: 50%;
    position: relative;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    margin: 0 auto;
    height: 3px;
    background: var(--clr-light);
}

.hamburger::before,
.hamburger::after {
    content: '';
    width: 100%;
}

.hamburger::before {
    transform: translateY(-6px);
}

.hamburger::after {
    transform: translateY(3px);
}

.nav {
    visibility: hidden;
    height: 0;
    position: absolute;
    font-size: var(--fs-400);
}

.nav--visible {
    visibility: visible;
    height: auto;
    position: relative;
}

.nav__list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav__list--primary {
    margin-bottom: 2em;
}

.nav__item {
    margin-top: .75em;
}

.nav__link {
    color: var(--clr-light);
    text-transform: uppercase;
    text-decoration: none;
}

.nav__link--button {
    padding: .25em .75em;
    background: var(--clr-light);
    color: #23424A;
    border-radius: 100px;
}

.nav__link:hover,
.nav__link:focus {
    opacity: .65;
}

.logo:hover {
    opacity: 1;
}

.logo img {
    margin: 0 auto;
}

.hero {
    margin: 0;
    padding-top: 9rem;
    padding-bottom: 3rem;
    background: no-repeat center url("images/clinician_using_software_v2.webp");
    background-size: cover;
    background-position: center;
    color: #FFF;
}

.hero__title {
    margin-bottom: 2rem;
    text-shadow: black 0.1rem 0.1rem 0.5rem;
    font-size: var(--fs-900);
    line-height: 1.1;
}

.mission {
    margin: 0;
    padding-block: 2em;
    background-color: var(--clr-light);
    color: var(--clr-dark-background);
}

.main {
    place-items: center;
    display: grid;
}

section {
    padding-top: 3em;
}

.product {
    background-color: var(--clr-secondary-background);
    color: var(--clr-light);
    padding-bottom: 3em;
}

.product div figure {
    margin: 0;
}

.product-preview img {
    margin-inline: auto;
}

.about {
    padding-block: 2em;
    background-color: var(--clr-light);
    color: var(--clr-dark-background);
}

.about__row {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    place-items: center;
    text-align: center;
    padding: 1em 0;
}

.profile {
    width: 12em;
    height: 17em;
}

.profile__image {
    /* see https://9elements.github.io/fancy-border-radius for cool shapes */
    /* border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; */
    /* border-radius: 60% 40% 60% 40% / 40% 40% 60% 60%; */
/*    border-radius: 50%;*/
    /* border-radius: 50% 50% 60% 40% / 50% 50% 50% 50%; */
    width: 100%;
    max-width: 180px;
    aspect-ratio: 1 / 1;
    margin-bottom: 15px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--clr-neutral-200);
    object-fit: cover;
    object-position: 50% 10%;
    margin: 0 auto;
}

.profile__image--jm {
    object-position: 50% 25%;
}

.profile__name {
    margin-top: 1rem;
    margin-bottom: .25em;
    font-size: var(--fs-500);
}

.profile__description {
    margin: 0;
    padding: 0;
}

.contact {
    margin-top: 0;
    padding-block: 2.5em;
    text-align: left;
    background-color: var(--clr-secondary-background);
}

address {
    font-style: normal;
}

.footer {
    padding-block: 2em;
    background-color: var(--clr-secondary-background);
    font-size: var(--fs-300);
}

/* Media Queries */

@media (min-width: 800px) {


    .nav-toggle {
        display: none;
    }

    .nav {
        visibility: visible;
        display: flex;
        align-items: center;
        justify-content: flex-end;
        height: auto;
        position: relative;
    }

    .nav__list {
        display: flex;
        margin: 0;
    }

    .nav__item {
        margin: 0 0 0 2.5em;
    }

    .hero {
        padding-top: 20rem;
    }

    .row {
        display: flex;
        justify-content: space-between;
    }
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}