:root{
  /* Custom color variables */
  --color-obsidian-500: lch(8.8 3.2 249);
  --color-iris-300: lch(58.2 7.7 259);
  --color-cobalt-800: lch(20 14 271.44);
  --color-cobalt-600: lch(35.99 32.7 271.44);
  --color-cobalt-400: lch(55.37 65.4 271.44);
  --color-cobalt-300: lch(75 65.4 271.44);
  --color-jade-800: lch(20 14 161.4);
  --color-jade-300: lch(75 56.2 161.4);
  --color-amber-800: lch(20 14 83.1);
  --color-amber-300: lch(75 82.3 83.1);
}

body{
  width: 100dvw;
  height: 100dvh;
  position: relative;
  background-color: var(--color-obsidian-500);
  font-family: "Helvetica Neue", Verdana, sans-serif;
}

.gradient{
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, var(--color-cobalt-400), var(--color-obsidian-500));
  filter: blur(80px);
  opacity: .15;
}

.pattern{
  position: absolute;
  inset: 0;
  background-image: url("../assets/images/pattern.png");
  background-repeat: repeat;
  opacity: 0.1;
}

/* Header */
.site-header{
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 54px;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  z-index: 10;
  pointer-events: none;
  color: white;
}

.site-header__logo{
  display: flex;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
}

.site-header__logo-icon{
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.site-header__logo-name{
  font-size: 0.9375rem;
  font-weight: 600;
}

.site-header__nav{
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  pointer-events: auto;
}

/* Rect link button */
.rect-button{
  all: unset;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  margin: 0.125rem;
  border-radius: 5.5px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  background-color: var(--color-cobalt-800);
  color: var(--color-cobalt-300);
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
}

.rect-button svg{
  flex-shrink: 0;
}

.rect-button .feature__button-overlay{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  max-width: none;
}

.rect-button .feature__button-ring{
  stroke: var(--color-cobalt-600);
  transition: stroke 0.2s;
}

/* Feature layout */
.feature{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature__media{
  flex: 1;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  background-color: var(--color-obsidian-500);
  isolation: isolate;
}

/* Blurred gradient layer behind all children */
.feature__media::before{
  content: "";
  position: absolute;
  inset: -80px;
  background: linear-gradient(to top, #031529 0%, #274666 100%);
  filter: blur(80px);
  opacity: 0.8;
  pointer-events: none;
  z-index: -1;
}

/* Noise layer above gradient, below video and overlays */
.feature__media::after{
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../assets/images/pattern.png");
  background-repeat: repeat;
  opacity: 0.1;
  pointer-events: none;
  z-index: -1;
}

.feature__content{
  flex: 1;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

/* Media frame */
.feature__media-frame{
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.feature__video{
  width: 100%;
  max-width: 36rem;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.55);
}

/* Media overlays */
.feature__media-label{
  position: absolute;
  top: 2.5rem;
  left: 2.75rem;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.625rem;
  text-transform: uppercase;
  color: var(--color-cobalt-300);
  opacity: 0.5;
  pointer-events: none;
}

.feature__media-label svg{
  width: 0.75rem;
  height: 0.75rem;
  flex-shrink: 0;
}

.feature__media-counter{
  position: absolute;
  bottom: 2.75rem;
  left: 2.75rem;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  pointer-events: none;
}

.feature__media-counter-current{
  display: block;
  font-size: 1rem;
  line-height: 1;
  font-weight: 400;
  color: var(--color-cobalt-300);
}

.feature__media-counter-total{
  font-size: 0.6875rem;
  line-height: 1;
  color: var(--color-cobalt-300);
  opacity: 0.4;
  letter-spacing: 0.08em;
}

.feature__media-tag{
  position: absolute;
  bottom: 3.25rem;
  right: 1.75rem;
  z-index: 1;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.5625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-cobalt-300);
  opacity: 0.25;
  pointer-events: none;
}

/* Content about block */
.feature__about{
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem;
  gap: 1rem;
  user-select: none;
}

.feature__about-index{
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-cobalt-300);
  opacity: 0.35;
  pointer-events: none;
}

.feature__about-title{
  font-size: 2.25rem;
  font-weight: 700;
  color: white;
  line-height: 1.2;
  pointer-events: none;
}

.feature__about-description{
  font-size: 0.875rem;
  color: var(--color-iris-300);
  pointer-events: none;
}

/* Feature link buttons */
.feature__links{
  display: flex;
  gap: 0.5rem;
}

/* Mode badges */
.feature__about-mode{
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  padding: 0.125rem 0.3rem;
  border-radius: 4px;
  vertical-align: middle;
}

.mode--normal{
  background-color: var(--color-jade-800);
  color: var(--color-jade-300);
}
.mode--insert{
  background-color: var(--color-amber-800);
  color: var(--color-amber-300);
}
.mode--visual{
  background-color: var(--color-cobalt-800);
  color: var(--color-cobalt-300);
}

/* Keyboard shortcut badges */
.feature__about-kbd{
  display: inline-block;
  background-color: var(--color-cobalt-800);
  color: var(--color-cobalt-300);
  font-size: 0.75rem;
  padding: 0.0625rem 0.3rem;
  border-radius: 4px;
  vertical-align: middle;
}

/* Controls */
.feature__controls{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}

.feature__button{
  all: unset;
  position: relative;

  border: none;
  border-radius: 100%;

  display: flex;
  justify-content: center;
  align-items: center;

  background-color: var(--color-cobalt-800);
  color: var(--color-cobalt-300);

  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.feature__button-overlay{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  max-width: none;
}

.feature__button-ring{
  stroke: var(--color-cobalt-600);
  transition: stroke 0.2s;
}

.feature__button--active{
  background-color: var(--color-cobalt-300);
  color: var(--color-obsidian-500);
}

.feature__button--active .feature__button-ring{
  stroke: var(--color-cobalt-300);
}

/* Fallback for non-desktop devices */
.fallback{
  display: none;
}

@media (max-width: 1024px){
  .site-header,
  .feature,
  .feature__controls{
    display: none;
  }

  .fallback{
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
    color: white;
  }

  .fallback__logo{
    display: flex;
    align-items: center;
    gap: 0.625rem;
  }

  .fallback__logo-icon{
    width: 1.75rem;
    height: 1.75rem;
    flex-shrink: 0;
  }

  .fallback__logo-name{
    font-size: 1.5rem;
    font-weight: 700;
  }

  .fallback__message{
    max-width: 20rem;
    font-size: 0.875rem;
    color: var(--color-iris-300);
    line-height: 1.6;
  }
}