/* actioncable-presence demo. Plain CSS, light and dark, no build step. */
:root {
  --bg: #fbfaf7;
  --bg-2: #f3f1ec;
  --card: #ffffff;
  --ink: #16181d;
  --ink-2: #4a4f5a;
  --muted: #6b7180;
  --line: #e4e1da;
  --accent: #d6402f;
  --accent-ink: #ffffff;
  --good: #1f8a55;
  --good-bg: #e8f6ee;
  --bad: #c2362a;
  --bad-bg: #fdecea;
  --warn: #9a6400;
  --warn-bg: #fff4dc;
  --info-bg: #eef2fb;
  --info: #3451a3;
  --code-bg: #f1eee8;
  --shadow: 0 1px 2px rgb(20 20 30 / 6%), 0 8px 24px rgb(20 20 30 / 6%);
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d12;
    --bg-2: #11141b;
    --card: #141821;
    --ink: #eceef3;
    --ink-2: #b9bfcc;
    --muted: #8a92a3;
    --line: #232836;
    --accent: #ff5a47;
    --good: #4cc98a;
    --good-bg: #0f2a1d;
    --bad: #ff6b5e;
    --bad-bg: #2d1412;
    --warn: #f2b84b;
    --warn-bg: #2b2210;
    --info-bg: #141d33;
    --info: #9db4ff;
    --code-bg: #1a1f2b;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px rgb(0 0 0 / 30%);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; width: 100%; max-width: 68rem; margin: 0 auto; padding: 0 1.25rem; }
a { color: inherit; text-underline-offset: 3px; }
code { font-family: var(--mono); font-size: .9em; background: var(--code-bg); padding: .1em .35em; border-radius: 6px; }
h1, h2 { letter-spacing: -0.02em; }
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

/* ---- chrome ---------------------------------------------------------------------------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  max-width: 68rem; width: 100%; margin: 0 auto; padding: 1.1rem 1.25rem;
}
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 650; text-decoration: none; font-family: var(--mono); font-size: .95rem; }
.brand-dot { width: .7rem; height: .7rem; border-radius: 50%; background: var(--good); box-shadow: 0 0 0 4px color-mix(in srgb, var(--good) 25%, transparent); animation: pulse 2.4s ease-in-out infinite; }
.topnav { display: flex; gap: 1.1rem; font-size: .92rem; align-items: center; }
.topnav a { text-decoration: none; color: var(--ink-2); }
.topnav a:hover { color: var(--ink); }
.flash { max-width: 68rem; margin: 0 auto 1rem; padding: .7rem 1.25rem; background: var(--warn-bg); color: var(--warn); border-radius: 10px; width: calc(100% - 2.5rem); }
.footer { color: var(--muted); font-size: .82rem; text-align: center; padding: 2.5rem 1.25rem 2rem; }

@keyframes pulse { 50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--good) 8%, transparent); } }

/* ---- buttons --------------------------------------------------------------------------------- */
.btn {
  appearance: none; border: 1px solid var(--line); background: var(--card); color: var(--ink);
  font: inherit; font-weight: 560; font-size: .95rem; padding: .55rem 1rem; border-radius: 10px;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { border-color: var(--muted); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-lg { padding: .8rem 1.35rem; font-size: 1.02rem; border-radius: 12px; }
.btn-sm { padding: .3rem .7rem; font-size: .85rem; }
.btn-primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn-primary:hover { opacity: .9; border-color: var(--ink); }
.btn-danger { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-danger:hover { filter: brightness(1.05); border-color: var(--accent); }
.btn-ghost { background: transparent; }
.btn-ghost[aria-pressed="true"] { background: var(--warn-bg); color: var(--warn); border-color: var(--warn); }
form.inline { display: inline; }

/* ---- landing --------------------------------------------------------------------------------- */
.hero { padding: 3.5rem 0 2.5rem; max-width: 46rem; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; font-weight: 650; color: var(--accent); margin: 0 0 .6rem; }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); line-height: 1.05; margin: 0 0 1.25rem; }
.lede { font-size: 1.12rem; color: var(--ink-2); margin: 0 0 1rem; }
.cta { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.8rem 0 1rem; }
.fineprint { color: var(--muted); font-size: .92rem; }
.me-chip { --c: #6f6e77; color: var(--c); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1rem 0 3rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.3rem 1.1rem; box-shadow: var(--shadow); }
.card h2 { font-size: 1.05rem; margin: 0 0 .5rem; display: flex; gap: .55rem; align-items: center; }
.card p { margin: 0; color: var(--ink-2); font-size: .95rem; }
.num { display: inline-grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--bg-2); border: 1px solid var(--line); font-size: .82rem; font-family: var(--mono); flex: none; }

.code-sample { display: grid; grid-template-columns: 1fr 1.6fr; gap: 1.5rem; align-items: center; margin-bottom: 2rem; }
.code-sample h2 { margin: 0 0 .4rem; font-size: 1.3rem; }
.code-sample p { color: var(--ink-2); margin: 0; }
pre { margin: 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.25rem; overflow-x: auto; font: .88rem/1.6 var(--mono); }
pre code { background: none; padding: 0; font-size: inherit; }

/* ---- room ------------------------------------------------------------------------------------ */
.room-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 1rem; padding: 1.5rem 0 1rem; }
.room-name { margin: 0; font-family: var(--mono); font-size: clamp(1.4rem, 4vw, 2rem); word-break: break-all; }
.room-actions { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; }
.rename { display: flex; gap: .4rem; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: .25rem .3rem .25rem .45rem; }
.rename input { font: inherit; font-size: .95rem; border: 0; background: transparent; color: var(--ink); width: 11.5rem; padding: .3rem .2rem; outline: none; }
.rename .btn { padding: .35rem .7rem; }

.here { display: flex; flex-wrap: wrap; align-items: center; gap: .9rem 1.2rem; padding: 1.1rem 1.25rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.avatars { display: flex; padding-left: .5rem; min-height: 3rem; }
.avatars .avatar { margin-left: -.55rem; transition: transform .3s ease, opacity .3s ease, filter .3s ease; }
.here-count { margin: 0; font-size: 1.05rem; }
.here-count strong { font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.invite { margin: 0; font-size: .9rem; flex-basis: 100%; }

.avatar {
  --c: #6f6e77;
  display: inline-grid; place-items: center; flex: none;
  width: 2.1rem; height: 2.1rem; border-radius: 50%;
  background: var(--c); color: #fff; font-weight: 650; font-size: .8rem; letter-spacing: .02em;
  border: 2px solid var(--card); user-select: none;
}
.avatar-sm { width: 1.9rem; height: 1.9rem; font-size: .72rem; }
.avatar-lg { width: 3rem; height: 3rem; font-size: 1rem; border-width: 3px; }
.avatar.enter { animation: pop-in .4s cubic-bezier(.2, 1.4, .4, 1); }
.avatar.leave { transform: scale(.2); opacity: 0; }
.avatar.ghosty { filter: grayscale(1); opacity: .45; }
@keyframes pop-in { from { transform: scale(.2); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1rem 0; }
.action { display: flex; flex-direction: column; gap: .45rem; }
.action p { margin: 0; font-size: .88rem; }

.banner { margin: 0 0 1rem; padding: .85rem 1.1rem; border-radius: 12px; font-weight: 520; font-variant-numeric: tabular-nums; border: 1px solid transparent; }
.banner-info { background: var(--info-bg); color: var(--info); }
.banner-warn { background: var(--warn-bg); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.banner-good { background: var(--good-bg); color: var(--good); border-color: color-mix(in srgb, var(--good) 30%, transparent); }
.banner-bad { background: var(--bad-bg); color: var(--bad); }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.panel-good { border-top: 3px solid var(--good); }
.panel-bad { border-top: 3px solid var(--bad); }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.panel-head h2 { margin: 0; font-size: 1.05rem; }
.panel-sub { font-size: .86rem; margin: .35rem 0 .8rem; }
.panel-foot { display: flex; justify-content: space-between; align-items: center; gap: .6rem; margin-top: auto; padding-top: .8rem; font-size: .85rem; }
.badge { font-size: .72rem; font-weight: 650; text-transform: uppercase; letter-spacing: .08em; padding: .2rem .55rem; border-radius: 999px; }
.badge-good { background: var(--good-bg); color: var(--good); }
.badge-bad { background: var(--bad-bg); color: var(--bad); }

.members { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .5rem; min-height: 3rem; }
.member { display: flex; align-items: center; gap: .7rem; padding: .55rem .6rem; border-radius: 10px; background: var(--bg-2); }
.member.enter { animation: row-in .3s ease; }
.member.is-ghost { background: repeating-linear-gradient(-45deg, var(--bad-bg), var(--bad-bg) 8px, transparent 8px, transparent 16px); }
.member.is-ghost .avatar { filter: grayscale(1); opacity: .5; }
.member-body { min-width: 0; flex: 1; }
.member-name { font-weight: 600; overflow-wrap: anywhere; }
.you { font-size: .7rem; font-weight: 650; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: .05rem .4rem; vertical-align: middle; }
.member-tabs { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .2rem; }
.tab-chip { font: .72rem/1.4 var(--mono); padding: .1rem .45rem; border-radius: 6px; background: var(--card); border: 1px solid var(--line); color: var(--ink-2); }
.tab-chip.mine { border-color: var(--good); color: var(--good); }
.tab-chip.ghost { border-color: var(--bad); color: var(--bad); text-decoration: line-through; text-decoration-thickness: 1px; }
.ghost-note { font-size: .72rem; font-weight: 650; color: var(--bad); white-space: nowrap; }
@keyframes row-in { from { opacity: 0; transform: translateY(-3px); } }

.how { margin: 1.25rem 0 0; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1.2rem; }
.how summary { cursor: pointer; font-weight: 600; }
.how-grid { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1.2rem; margin: .9rem 0 .6rem; font-size: .92rem; }
.how-grid dt { color: var(--muted); }
.how-grid dd { margin: 0; font-family: var(--mono); font-size: .86rem; overflow-wrap: anywhere; }
.how-note { font-size: .86rem; margin: 0; }

/* ---- readme ---------------------------------------------------------------------------------- */
.readme { max-width: 50rem; }
.readme-note { font-size: .9rem; padding: .7rem 1rem; background: var(--bg-2); border-radius: 10px; }
.prose { padding-bottom: 2rem; }
.prose h1 { font-size: 2rem; }
.prose h2 { font-size: 1.35rem; margin-top: 2.2rem; }
.prose table { border-collapse: collapse; width: 100%; font-size: .9rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: .45rem .6rem; text-align: left; vertical-align: top; }
.prose img { max-width: 100%; border-radius: 10px; border: 1px solid var(--line); }
.prose li { margin: .25rem 0; }

/* ---- small screens --------------------------------------------------------------------------- */
@media (max-width: 760px) {
  .cards, .compare, .actions, .code-sample { grid-template-columns: 1fr; }
  .hero { padding-top: 1.75rem; }
  .room-head { align-items: stretch; }
  .room-actions { width: 100%; }
  .room-actions .rename { flex: 1; }
  .rename input { width: 100%; min-width: 0; flex: 1; }
  .topnav { gap: .8rem; font-size: .85rem; }
  .topnav .muted { display: none; }
  .actions .btn-lg { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}