/* Glampfire app shell. Replaces Campfire's layout.css.

   Signed in (body.app):  rail | sidebar card | main card (header + content) | details panel
   Narrow screens:        main card only; rail + sidebar slide in as a drawer. */

html {
  overscroll-behavior: none;
}

body {
  --footer-height: 5.5rem;
  --navbar-height: 0px;
  --sidebar-width: 0px;
  --rail-width: 56px;
  --shell-gap: 8px;

  background-color: var(--gf-canvas);
  margin: 0;
}

/* Signed-out pages (sign in, first run, join): a simple column until their redesign. */
body:not(.app) {
  display: grid;
  grid-template-rows: min-content 1fr;
  max-block-size: 100dvh;

  #main-content { overflow: auto; }
  #sidebar { display: none; }
}

/* Signed in */
body.app {
  block-size: 100dvh;
  column-gap: var(--shell-gap);
  display: grid;
  grid-template-areas:
    "rail nav"
    "rail main";
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
  padding: var(--shell-gap) var(--shell-gap) var(--shell-gap) 0;

  &.sidebar {
    --sidebar-width: 272px;

    grid-template-areas:
      "rail sidebar nav"
      "rail sidebar main";
    grid-template-columns: var(--rail-width) var(--sidebar-width) minmax(0, 1fr);
  }

  &.sidebar.room-panel-open {
    grid-template-areas:
      "rail sidebar nav panel"
      "rail sidebar main panel";
    grid-template-columns: var(--rail-width) var(--sidebar-width) minmax(0, 1fr) 320px;
  }
}

/* One card behind the header and the content */
.app-card {
  background-color: var(--gf-surface);
  border-radius: var(--gf-radius-card);
  box-shadow: var(--gf-shadow-card);
  grid-column: nav;
  grid-row: nav-start / main-end;
}

body.app {
  #nav { grid-area: nav; z-index: 1; }

  #main-content {
    display: flex;
    flex-direction: column;
    grid-area: main;
    min-block-size: 0;
    overflow: auto;
    position: relative;
    z-index: 1;
  }

  &.sidebar #main-content { overflow: hidden; }

  #sidebar {
    background-color: var(--gf-surface);
    border-radius: var(--gf-radius-card);
    box-shadow: var(--gf-shadow-card);
    display: flex;
    flex-direction: column;
    grid-area: sidebar;
    min-block-size: 0;
    overflow: hidden;
  }

  &:not(.sidebar) #sidebar { display: none; }
}

#footer {
  flex: none;
}

/* Rail */
.rail {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
  grid-area: rail;
  padding-block: 4px;
}

.rail__logo {
  align-items: center;
  block-size: 40px;
  border-radius: 12px;
  display: flex;
  inline-size: 40px;
  justify-content: center;

  img { block-size: 30px; inline-size: 30px; }
  &:active { scale: 0.96; }
}

.rail__group {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rail__group--end {
  gap: 10px;
  margin-block-start: auto;
}

.rail__item {
  align-items: center;
  block-size: 40px;
  border-radius: var(--gf-radius-control);
  color: var(--gf-ink-subtle);
  display: flex;
  inline-size: 40px;
  justify-content: center;

  .icon { block-size: 20px; inline-size: 20px; }
  &:hover { background-color: var(--gf-selected); color: var(--gf-ink); }
  &:active { scale: 0.96; }

  &[aria-current="page"] {
    background-color: var(--gf-surface);
    box-shadow: var(--gf-shadow-card);
    color: var(--gf-ink);
  }
}

.rail__avatar {
  border-radius: 50%;
  display: block;

  img {
    block-size: 36px;
    border-radius: 50%;
    display: block;
    inline-size: 36px;
    object-fit: cover;
    outline: 1px solid oklch(0% 0 0 / 0.1);
    outline-offset: -1px;
  }

  &[aria-current="page"] img { outline: 2px solid var(--gf-ink); outline-offset: 2px; }
  &:active { scale: 0.96; }

  @media (prefers-color-scheme: dark) {
    img { outline-color: oklch(100% 0 0 / 0.1); }
  }
}

.rail :is(a):focus-visible {
  outline: 2px solid var(--gf-mention);
  outline-offset: 2px;
}

/* Room details panel */
.room-panel {
  background-color: var(--gf-surface);
  border-radius: var(--gf-radius-card);
  box-shadow: var(--gf-shadow-card);
  grid-column: panel;
  grid-row: nav-start / main-end;
  min-block-size: 0;
  overflow-y: auto;

  &[hidden] { display: none; }
}

/* Narrow screens: the main card fills the window; rail + sidebar are a drawer. */
.app-backdrop { display: none; }

@media (max-width: 100ch) {
  body.app,
  body.app.sidebar,
  body.app.sidebar.room-panel-open {
    grid-template-areas: "nav" "main";
    grid-template-columns: minmax(0, 1fr);
    padding: 0;
  }

  .app-card { border-radius: 0; box-shadow: none; }

  body.app .rail,
  body.app.sidebar #sidebar {
    block-size: 100dvh;
    inset-block: 0;
    position: fixed;
    /* The drawer is occasional and spatial: it slides, once, quickly. */
    transition: translate 200ms var(--gf-ease-drawer);
    translate: calc(-100% - var(--rail-width) - 24px) 0;
    z-index: 30;
  }

  body.app .rail {
    background-color: var(--gf-canvas);
    inline-size: var(--rail-width);
    inset-inline-start: 0;
    padding-block: 12px;
  }

  body.app.sidebar #sidebar {
    border-radius: 0;
    inline-size: min(300px, calc(100vw - var(--rail-width) - 48px));
    inset-inline-start: var(--rail-width);
  }

  body.app.sidebar-open :is(.rail, #sidebar) { translate: 0 0; }

  .app-backdrop {
    background: oklch(0% 0 0 / 0.35);
    display: block;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    position: fixed;
    transition: opacity 200ms var(--gf-ease-out);
    z-index: 25;

    .sidebar-open & { opacity: 1; pointer-events: auto; }
  }

  .room-panel {
    border-radius: 0;
    box-shadow: var(--gf-shadow-pop);
    inline-size: min(360px, 100vw);
    inset: 0 0 0 auto;
    position: fixed;
    z-index: 30;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.app :is(.rail, #sidebar) { transition: none; }
}