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

:root {
  font-size: 16px;
  --page-padding: 1.5rem;
  --color-text: #fff;
  --color-bg: #12100e;
  --color-link: rgba(255, 255, 255, 0.6);
  --color-link-hover: #fff;
  --color-bg-1: #2f251e;
  --color-bg-2: #43392f;
  --color-bg-3: var(--color-bg-1);
  --color-bg-4: var(--color-bg-2);
  --color-bg-5: var(--color-bg-1);
  --color-bg-6: var(--color-bg-2);
}

body {
  margin: 0;
  color: var(--color-text);
}

.demo-2,
.demo-4,
.demo-6,
.demo-8,
.demo-10,
.demo-12,
.demo-14 {
  --color-text: #000;
  --color-bg: #e1e1e1;
  --color-link: rgba(0, 0, 0, 0.6);
  --color-link-hover: #000;
  --color-bg-1: #9d9d9d;
  --color-bg-2: #c7c7c7;
  --color-bg-3: var(--color-bg-1);
  --color-bg-4: var(--color-bg-2);
  --color-bg-5: var(--color-bg-1);
  --color-bg-6: var(--color-bg-2);
}

.demo-9 {
  --color-bg-1: #2f251e;
  --color-bg-2: #43392f;
  --color-bg-3: #18130e;
  --color-bg-4: var(--color-bg-1);
  --color-bg-5: var(--color-bg-2);
  --color-bg-6: var(--color-bg-3);
}

.demo-10 {
  --color-bg-1: #9d9d9d;
  --color-bg-2: #c7c7c7;
  --color-bg-3: #7c7c7c;
  --color-bg-4: var(--color-bg-1);
  --color-bg-5: var(--color-bg-2);
  --color-bg-6: var(--color-bg-3);
}

/* Page Loader */
.js .loading::before,
.js .loading::after {
  content: "";
  position: fixed;
  z-index: 5000;
}

.js .loading::before {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg);
}

.js .loading::after {
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  margin: -30px 0 0 -30px;
  border-radius: 50%;
  opacity: 0.4;
  background: var(--color-link);
  animation: loaderAnim 0.7s linear infinite alternate forwards;
}

@keyframes loaderAnim {
  to {
    opacity: 1;
    transform: scale3d(0.5, 0.5, 1);
  }
}

a {
  text-decoration: none;
  color: var(--color-link);
  outline: none;
  cursor: pointer;
}

a:hover {
  color: var(--color-link-hover);
  outline: none;
}

/* Better focus styles from https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-visible */
a:focus {
  /* Provide a fallback style for browsers
	 that don't support :focus-visible */
  outline: none;
  background: lightgrey;
}

a:focus:not(:focus-visible) {
  /* Remove the focus indicator on mouse-focus for browsers
	 that do support :focus-visible */
  background: transparent;
}

a:focus-visible {
  /* Draw a very noticeable focus style for
	 keyboard-focus on browsers that do support
	 :focus-visible */
  outline: 2px solid red;
  background: transparent;
}

.unbutton {
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  cursor: pointer;
}

.unbutton:focus {
  outline: none;
}

.frame {
  padding: var(--page-padding);
  position: relative;
  display: grid;
  z-index: 1000;
  width: 100%;
  grid-row-gap: 1rem;
  grid-column-gap: 2rem;
  justify-items: start;
  text-transform: uppercase;
  font-size: 12px;
}

.frame--header {
  height: 100%;
  z-index: 3000;
  background-size: auto 80%;
  background-position: 120% 50%;
  background-repeat: no-repeat;
  grid-template-areas: "title" "prev" "back" "sub" "sponsor" "demos" "heading";
}

.frame--footer {
  grid-template-areas: "credits" "author";
  align-content: end;
}

.frame #cdawrap {
  justify-self: start;
}

.frame a {
  pointer-events: auto;
}

.frame__title {
  grid-area: title;
  font-size: inherit;
  margin: 0;
}

.frame__back {
  grid-area: back;
  justify-self: start;
}

.frame__prev {
  grid-area: prev;
  justify-self: start;
}

.frame__sub {
  grid-area: sub;
}

.frame__demos {
  grid-area: demos;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  align-self: start;
  flex-wrap: wrap;
  background: var(--color-bg);
  border: 1px solid;
  padding: 1rem;
  border-radius: 10px;
}

.frame__demos > * {
  width: 2rem;
  display: block;
  flex: none;
  text-decoration: none;
  border-radius: 50%;
  aspect-ratio: 1;
  border: 1px solid var(--color-link-hover);
  display: grid;
  place-items: center;
  padding-top: 0.2em;
  background: var(--color-bg);
}

.frame__demos > span {
  filter: invert(100%);
}

.frame__demos::before {
  content: "Variations:";
}

.frame__heading {
  grid-area: heading;
  align-self: center;
  justify-self: start;
  width: min-content;
  display: flex;
  flex-direction: column;
  margin-top: 10vh;
}

.frame__heading h2 {
  margin: 0;
  line-height: 0.9;
  text-transform: uppercase;
  margin-left: -0.065em;
  font-size: clamp(2.5rem, 12vw, 7rem);
  letter-spacing: -0.105em;
  font-variation-settings: "slnt" 0, "wdth" 400, "wght" 900, "INKT" 400;
}

i {
  font-style: normal;
  font-variation-settings: "slnt" 0, "wdth" 100, "wght" 400, "INKT" 400;
}

.frame__heading p {
  margin: 0;
}

.frame__credits {
  grid-area: credits;
}

.frame__author {
  display: flex;
  gap: 1.5rem;
  grid-area: author;
}

.content {
  padding: 24px 18px;
  border-radius: 24px;
}

.content--perspective {
  perspective-origin: 50% 0%;
  perspective: 1000px;
}

.text-large {
  font-size: clamp(1.5rem, 5vw, 3rem);
  max-width: 900px;
  margin: 0 0 0.85em 0;
  line-height: 1.2;
  font-variation-settings: "slnt" 0, "wdth" 100, "wght" 500, "INKT" 100;
}

.content--sticky {
  width: 100vw;
  position: sticky;
  top: 0;
  --offset: 0px;
  top: var(--offset);
}

.content--grid,
.content--grid .content__inner {
  display: grid;
  overflow: hidden;
  grid-column-gap: 5vw;
  grid-row-gap: 2vh;
  align-content: center;
  grid-template-areas: "content-img" "content-title" "content-text";
  justify-items: center;
}

.content--grid:has(.content__inner) {
  display: block;
  padding: 0;
}

.content__inner {
  width: 100%;
  height: 100%;
  border-radius: 0 0 2rem 2rem;
}

.content--card {
  width: 95vw;
  max-width: 500px;
  aspect-ratio: 0.8;
  top: 10vh;
  margin: auto;
  border-radius: 14px;
  min-height: 444px;
}

.content--card .content__title {
  font-size: clamp(1.5rem, 4vw, 3.5rem);
}

.content--card .content__title i {
  display: block;
}

.content--half {
  display: flex;
  flex-direction: column;
  gap: 3vh;
  text-align: center;
}

.content--half:nth-child(odd) {
  margin-left: auto;
}

.content__img {
  grid-area: content-img;
  width: 50%;
  max-width: 300px;
  height: auto;
}

.content__img--large {
  width: 60%;
  height: auto;
}

.content__img--small {
  height: 35%;
  width: auto;
}

.spacer {
  margin-top: 20vh;
}

.content__title {
  grid-area: content-title;
  letter-spacing: -0.095em;
  text-transform: uppercase;
  line-height: 1;
  font-weight: normal;
  font-size: clamp(2rem, 6vw, 5rem);
  margin: 0;
  font-variation-settings: "slnt" 0, "wdth" 400, "wght" 900, "INKT" 400;
}

.content__text {
  margin: 0;
  max-width: 500px;
  grid-area: content-text;
  text-align: center;
  line-height: 1.5;
  padding: 0 1rem;
  backface-visibility: hidden;
}

.content__text--narrow {
  max-width: 300px;
}

.content--intro {
  padding-top: 25vh;
  padding-bottom: 25vh;
  z-index: 2;
}

.content--outro {
  padding-top: 50vh;
  padding-bottom: 30vh;
}

.bg-1 {
  background-image: url("../images/i1.png");
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.bg-2 {
  background-image: url("../images/i2.png");
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.bg-3 {
  background-image: url("../images/i3.png");
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.bg-1::after,
.bg-2::after,
.bg-3::after {
  position: absolute;
  content: "";
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  background-color: #000;
  opacity: 0.6;
}

.wrap-cards__info {
  display: flex;
  align-items: flex-start;
  justify-content: space-around;
  position: absolute;
  width: 100%;
  bottom: 42px;
}

.wrap-cards__info-title {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: 18px;
  line-height: 110%;
  color: #f4f4f4;
  z-index: 10;
}

.wrap-cards__info-subtitle {
  font-family: var(--font-family);
  font-weight: 400;
  font-size: 16px;
  line-height: 140%;
  color: #d8d8d8;
  max-width: 380px;
  z-index: 10;
}

@media screen and (min-width: 63em) {
  body {
    --page-padding: 2rem 3rem;
  }
  .frame--header {
    height: 100vh;
    grid-template-columns: auto auto auto 1fr 1fr;
    grid-template-rows: auto 1fr auto;
    align-content: space-between;
    grid-template-areas: "title back prev sub sponsor" "heading heading heading heading heading" "demos demos demos demos demos";
  }
  .frame__heading {
    margin-top: 0;
  }
  .frame__heading h2 {
    white-space: nowrap;
  }
  .frame__heading p {
    margin: 0 0 0 auto;
  }
  .content--grid .content__title {
    align-self: end;
  }
  .frame__demos {
    position: fixed;
    bottom: 2rem;
  }
  .frame--footer {
    padding-bottom: 0;
    grid-template-areas: "credits ..." "... author";
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 6rem;
  }
  .frame__author {
    align-self: center;
  }
  .frame #cdawrap {
    max-width: 300px;
    text-align: right;
  }
  .frame #cdawrap,
  .frame__author,
  .frame__sub {
    justify-self: end;
  }
  .content--grid,
  .content--grid .content__inner {
    grid-template-areas: "content-img content-title" "content-img content-text";
    grid-template-columns: 30% 1fr;
    justify-items: start;
  }
  .content__img--large {
    width: 160%;
  }
  .content__img--left {
    justify-self: end;
  }
  .content__text--left {
    text-align: left;
    align-self: start;
  }
  .content--card {
    max-width: 1140px;
    width: 100%;
    max-height: 600px;
    margin-bottom: 20px;
  }
  .content--half {
    width: 50%;
  }
}

.wrap-cards-title {
  max-width: 760px;
  margin: 0 auto;
  padding: 120px 0 60px 0;
}