:root {
  --clr-black: hsl(0 0% 0%);
  --clr-white: hsl(0 0% 100%);

  --fs-scale-200: 0.75rem;
  --fs-scale-300: 0.875rem;
  --fs-scale-400: 1rem;
  --fs-scale-600: 1.44rem;
  --fs-scale-700: 2.1875rem;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;
  --fw-black: 900;

  --base-bg: var(--clr-white);
  --base-color: var(--clr-black);
  --base-font-family: 'BDO Grotesk','Inter', sans-serif;
  --base-font-size: var(--fs-scale-400);
  --base-font-weight: var(--fw-regular);
  --base-line-heigth: 1.25;

  --frame-spacer: 1rem;

  --transition-time: 200ms;

  --min-column-width: 450px;

  @media (min-width: 900px) {
    --frame-spacer: 3rem;
  }

}

@font-face {
  font-family: "BDO Grotesk";
  src: url("../fonts/BDOGrotesk-VF.woff2") format("woff2 supports variations"),
       url("../fonts/BDOGrotesk-VF.woff2") format("woff2-variations");
  font-weight: 300 900;
  font-display: swap;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--base-bg);
  color: var(--base-color);
  font-family: var(--base-font-family);
  font-size: var(--base-font-size);
  font-weight: var(--base-font-weight);
  line-height: var(--base-line-heigth);
}

h1 {
  margin: 0;
  font-size: var(--fs-scale-600);
  font-weight: var(--fw-medium);
  line-height: 1;
  margin-block: 1rem;
  @media (min-width: 900px) {
    transform: translateX(-2px);
    font-size: var(--fs-scale-700);
    margin-block: 1.75em;
  }
}

h2 {
  margin: 0;
  font-size: var(--base-font-size);
  font-weight: var(--base-font-weight);
}

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

a {
  color: currentColor;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.page-header {
  box-sizing: border-box;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(var(--min-column-width), 100%), 1fr));
  gap: 1.2rem;
  padding-inline: var(--frame-spacer);
  padding-block-end: var(--frame-spacer);
}

.page-header__titlebar {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem
}

.page-header__info {
  font-size: var(--fs-scale-200);
  font-weight: var(--fw-light);
  line-height: 1.55;
}

.page-header__navigation {
  position: absolute;
  right: 0;
  top: 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 3rem 1.5rem;
  background-color: hsl(from var(--base-color) H S L / .9);
  color: var(--base-bg);
  font-size: var(--fs-scale-600);
  font-weight: var(--fw-regular);
  text-transform: uppercase;
  line-height: 1.55;
  transform: translateY(-100%);
  transition: var(--transition-time);
  @media (min-width: 900px) {
    flex-direction: row;
    gap: 3rem;
    position: static;
    padding: 0;
    background-color: transparent;
    color: var(--base-color);
    font-size: var(--fs-scale-300);
    font-weight: var(--fw-bold);
    line-height: var(--base-line-heigth);
    transform: translateY(0);
    transition: 0ms;
  }
  ul {
    margin: 0;
    padding: 0;
    list-style: none;
  }
  svg {
    width: 1em;
    transform: translateY(1px);
  }
  .active {
    text-decoration: underline;
  }
  .external {
    display: inline-flex;
    align-items: baseline;
    gap: 0.5rem;
  }
  a:hover {
    text-decoration: underline;
  }
}

.page-header__navigation.visible {
  transform: translateY(0);
}

/* homepage-specific */

.home .page-header {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 100;
  width: 100%;
}

.page-header .adapt,
.page-header .adapt a {
  color: var(--clr-black);
  transition: color .4s;
}

.page-header .adapt.on-dark,
.page-header .adapt.on-dark a {
  color: var(--clr-white);
}

.page-header .adapt svg {
  fill: currentColor;
}

.page-header__navigation .adapt a {
  @media (max-width: 899.9px) {
    color: var(--clr-white);
  }
}

/* --------------------------------------------------------------------------
   Content
   -------------------------------------------------------------------------- */

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(var(--min-column-width), 100%), 1fr));
  gap: 1.2rem;
  padding-inline: var(--frame-spacer);
}

.content-grid__item {
  h2 {
    margin-block: .35em;
  }
}

/* --------------------------------------------------------------------------
   About-me
   -------------------------------------------------------------------------- */
.about-and-contact .mywrap {
  display: flex;
  align-items: stretch;
  gap: 2rem;
}

.about-and-contact .content {
  padding-inline: var(--frame-spacer);
}

.about-and-contact .mytext {
  display: flex;
  flex: 0 0 min(35%, 35rem);
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 5em;
}

.about-and-contact .mytext p {
  margin: 0;
  line-height: 1.4;
}

.about-and-contact .mytext p::first-line {
  font-weight: 700;
  text-transform: uppercase;
}

.about-and-contact .myphoto {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
}

.about-and-contact .myphoto img {
  position: absolute;
  inset: 0;
  display: block;
  width: auto;
  max-width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left top;
}

@media (max-width: 899.9px) {
  .about-and-contact .mywrap {
    flex-direction: column;
  }

  .about-and-contact .mytext {
    flex-basis: auto;
    padding-bottom: 0;
  }

  .about-and-contact .myphoto {
    position: static;
    flex-basis: auto;
  }

  .about-and-contact .myphoto img {
    position: static;
    width: 100%;
    height: auto;
    max-width: 100%;
  }
}

/* --------------------------------------------------------------------------
   Hamburger
   -------------------------------------------------------------------------- */

.hamburger {
  --hamburger-size: 32px;
  --hamburger-color: var(--clr-black);
  --hamburger-background: transparent;
  --hamburger-line-height: 4px;
  --hamburger-line-spacing: 8px;
  --hamburger-inner-padding: 8px;
  --hamburger-time: var(--transition-time);
  z-index: 10;
  position: relative;
  display: block;
  width: var(--hamburger-size);
  height: var(--hamburger-size);
  font-size: 0;
  border: var(--hamburger-inner-padding) solid transparent;
  cursor: pointer;
  background-color: var(--hamburger-background);
  @media (min-width: 900px) {
    display: none;
  }
  span {
    display: block;
    position: absolute;
    width: var(--hamburger-size);
    top: 50%;
    height: var(--hamburger-line-height);
    background: var(--hamburger-color);
    transform: translateY(calc(var(--hamburger-line-height) / -2));
    transition: 0ms var(--hamburger-time);
    border-radius: var(--hamburger-line-height);
  }
  span::before,
  span::after {
    content: "";
    display: block;
    position: absolute;
    width: var(--hamburger-size);
    height: var(--hamburger-line-height);
    background-color: var(--hamburger-color);
    border-radius: var(--hamburger-line-height);
  }
  span::before {
    top: calc(var(--hamburger-line-spacing) * -1);
    transition: top var(--hamburger-time) var(--hamburger-time), transform var(--hamburger-time) 0ms;
  }
  span::after {
    bottom: calc(var(--hamburger-line-spacing) * -1);
    transition: bottom var(--hamburger-time) var(--hamburger-time), transform var(--hamburger-time) 0ms;
  }
}

.hamburger.active {
  --hamburger-color: var(--clr-white);
  span {
    background-color: transparent;
  }
  span::before {
    transform: rotate(45deg);
    top: 0;
    transition: top var(--hamburger-time) 0ms, transform var(--hamburger-time) var(--hamburger-time);
  }
  span::after {
    transform: rotate(-45deg);
    bottom: 0;
    transition: bottom var(--hamburger-time) 0ms, transform var(--hamburger-time) var(--hamburger-time);
  }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.page-footer {
  margin-block-start: 2rem;
}