:root {
  --page-pad: 32px;
  --project-gap: 26px;
  --nav-w: 240px;
  --logo-w: 240px;

  --nav-gap: 20px;
}

.page {
  display: flex;
  flex-direction: column;
  width: 100%;
  margin: 0;
  padding: 36px 0 48px var(--page-pad);
  min-height: 100dvh;
}

.rail {
  display: contents;
}

.content { order: 1; flex: 1; display: flex; flex-direction: column; min-width: 0; }
.main    { position: relative; }

.page-footer { margin-top: auto; }

header {
  margin-bottom: 6px;
}

.logo-heading {
  margin: 0 0 10px;
  line-height: 0;
}

.logo {
  width: min(var(--logo-w), calc(100vw - var(--page-pad) * 2));
}

.page-description {
  max-width: calc(100vw - var(--page-pad) * 2);
  padding-bottom: 22px;
}

.site-nav {
  position: relative;
  z-index: 30;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--nav-gap);
  margin-bottom: 14px;
}

.nav-group {
  position: relative;
}

.nav-category {
  appearance: none;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  font-size: var(--nav-heading);
  font-weight: 600;
  text-align: left;
  color: var(--fg);
  cursor: pointer;
  transition: color 0.12s ease;
}

.nav-list {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 1;
  min-width: 150px;
  max-width: calc(100vw - var(--page-pad) * 2);
  padding: 4px 16px 6px;
  background: var(--bg);
  border: 1px solid color-mix(in srgb, var(--fg) 16%, transparent);
  border-radius: 10px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.16);
  transition: opacity 160ms ease, transform 160ms ease;
  transform-origin: left top;
}

.nav-link {
  display: block;
  padding: 1px 0;
  font-size: var(--nav-item);
  line-height: 1.4;
  white-space: nowrap;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.12s ease;
}

@media (max-width: 599.98px) {
  .nav-link {
    padding: 12px 0;
  }

  .nav-list {
    max-height: 50svh;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .nav-category.is-open {
    color: var(--accent);
  }

  .nav-list.is-hidden {
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
    pointer-events: none;
  }

  .nav-list.is-collapsed {
    display: none;
  }
}

.nav-link.is-active,
.nav-link.is-hot {
  color: var(--accent);
}

.nav-link.is-active {
  font-weight: 600;
}

.category {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 12px;
  padding: 22px var(--page-pad) 0 0;
  font-size: 0.75rem;
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  transition: opacity 300ms ease, transform 300ms ease;
  transform-origin: left top;
}

.category::before {
  content: "";
  flex: 1;
  border-top: 1px solid color-mix(in srgb, var(--fg) 16%, transparent);
}

.main > .category:first-child {
  padding-top: 0;
}

.category.is-hidden {
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
}

.category.is-collapsed {
  display: none;
}

.project {
  margin-bottom: var(--project-gap);
  scroll-margin-top: 32px;
}

.project.is-hot .project-title {
  color: var(--accent);
}

@media (pointer: fine) {
  .video-row {
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    touch-action: pan-x pan-y;
  }

  .video-row.is-dragging,
  .video-row.is-dragging .thumb-container {
    cursor: grabbing;
  }

  body.is-row-dragging {
    cursor: grabbing;
    user-select: none;
    -webkit-user-select: none;
  }

  .video-wrapper.is-grabbed {
    transform: scale(0.95) translateZ(0);
  }
}

@media (min-width: 600px) {
  :root {
    --main-tail: 14svh;

    --nav-w: clamp(var(--logo-w), calc(var(--logo-w) + (100vw - 800px) * 64 / 600), calc(var(--logo-w) + 64px));

    --gutter: var(--page-pad);
  }

  .page {
    display: grid;
    grid-template-columns: calc(var(--nav-w) + var(--gutter)) minmax(0, 1fr);
    gap: 0;
    align-items: start;
    padding: 0 0 0 var(--page-pad);
  }

  .rail {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100dvh;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 36px var(--gutter) 36px 0;
    scrollbar-width: none;
  }

  .rail::-webkit-scrollbar {
    display: none;
  }

  .rail > * {
    flex: 0 0 auto;
  }

  .page-description {
    max-width: none;
  }

  .main {
    padding: 96px 0 var(--main-tail);
    min-width: 0;
  }

  .content {
    min-height: 100dvh;
  }

  .page-footer {
    padding-bottom: 48px;
  }

  .site-nav {
    display: block;
    z-index: auto;
    margin-bottom: 0;
  }

  .nav-group {
    margin-bottom: 22px;
  }

  .nav-category {
    display: block;
    margin-bottom: 4px;
  }

  .nav-category:disabled {
    cursor: default;
    color: var(--fg);
    opacity: 1;
  }

  .nav-list {
    position: static;
    min-width: 0;
    max-width: none;
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    transition: none;
  }
}