* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  display: grid;
  grid-template: 1fr auto / 1fr auto;
  background: #111; color: #eee;
  font: 15px system-ui, -apple-system, "Segoe UI", sans-serif;
}
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.pill { position: absolute; z-index: 4; padding: 5px 12px; border-radius: 999px; background: rgba(0, 0, 0, 0.6); font-size: 13px; }
#status { top: 14px; left: 14px; }
#show-self { top: 14px; right: 14px; }
#sharing { top: 14px; left: 50%; transform: translateX(-50%); background: #2b8a3e; }
#sharing button { margin-left: 8px; padding: 2px 10px; border-radius: 6px; background: #e02828; }

/* ---------- stage: speaker (default), gallery, screen share ---------- */
#stage { grid-area: 1 / 1; position: relative; min-height: 0; display: grid; gap: 8px; padding: 8px; overflow: hidden; }
#tiles { position: relative; min-height: 0; }
.tile { position: relative; overflow: hidden; border-radius: 10px; background: #232323; }
.tile video { width: 100%; height: 100%; object-fit: cover; display: block; }
#remote { object-fit: contain; }
#local { transform: scaleX(-1); }
.tile.nocam video { visibility: hidden; }
.placeholder { display: none; position: absolute; inset: 0; place-items: center; font-size: 22px; color: #bbb; }
.tile.nocam .placeholder { display: grid; }
.name { position: absolute; left: 8px; bottom: 8px; display: flex; gap: 4px; align-items: center; padding: 2px 8px; border-radius: 6px; background: rgba(0, 0, 0, 0.6); font-size: 13px; }
.name svg { width: 14px; height: 14px; color: #ff453a; }
#hide-self { position: absolute; top: 4px; right: 6px; font-size: 20px; line-height: 1; opacity: 0; transition: opacity 0.15s; }
#local-tile:hover #hide-self { opacity: 1; }

/* speaker: the other person fills the stage, my video floats and can be dragged */
#remote-tile { position: absolute; inset: 0; }
#local-tile { position: absolute; z-index: 3; top: 14px; right: 14px; width: 220px; aspect-ratio: 16 / 9; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5); cursor: grab; touch-action: none; }

/* gallery: equal tiles side by side */
#stage.gallery #tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-content: center; }
#stage.gallery .tile { position: relative; inset: auto; width: auto; aspect-ratio: 16 / 9; box-shadow: none; cursor: default; }

/* screen share: picture big, cameras in a strip on the right */
#stage.has-screen { grid-template-columns: 1fr clamp(200px, 15vw, 360px); }
#stage.has-screen #status { top: auto; bottom: 14px; } /* keep the top free for the annotation bar */
#stage.has-screen #tiles { display: flex; flex-direction: column; gap: 8px; }
#stage.has-screen .tile { position: relative; inset: auto; width: 100%; aspect-ratio: 16 / 9; box-shadow: none; cursor: default; }
#stage.has-screen #remote { object-fit: cover; }

#screen-wrap { position: relative; min-height: 0; overflow: hidden; border-radius: 10px; background: #000; container-type: size; }
#screen { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
#ink { position: absolute; z-index: 1; pointer-events: none; touch-action: none; }
#ink.active { pointer-events: auto; cursor: crosshair; }
#ink.tool-control { cursor: default; }
#ink.tool-eraser { cursor: cell; }
#ink.tool-text { cursor: text; }
#text-input { position: absolute; z-index: 3; min-width: 200px; padding: 4px 8px; border: 2px solid #0a84ff; border-radius: 6px; background: rgba(0, 0, 0, 0.75); color: #fff; font: 600 16px system-ui, sans-serif; }

/* annotation bar over the shared screen */
.bar { position: absolute; z-index: 2; top: 10px; left: 50%; transform: translateX(-50%); max-width: calc(100% - 16px); overflow-x: auto; scrollbar-width: none; display: flex; align-items: center; gap: 2px; padding: 4px 6px; border-radius: 10px; background: rgba(30, 30, 30, 0.92); box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5); }
.bar button { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 64px; padding: 5px 6px; border-radius: 7px; font-size: 11px; color: #ddd; }
.bar button svg { width: 20px; height: 20px; }
.bar button:hover { background: #3a3a3a; }
.bar button.on { background: #0e71eb; color: #fff; }
#colors { display: flex; gap: 6px; padding: 0 8px; }
/* narrow picture (small laptop, chat open, phone): icons only */
@container (max-width: 760px) or (max-height: 400px) {
  .bar button { min-width: 0; padding: 6px; }
  .bar button span { display: none; }
  #colors { padding: 0 4px; gap: 4px; }
}
#colors button { flex: none; min-width: 0; width: 20px; height: 20px; padding: 0; border-radius: 50%; border: 2px solid #555; }
#colors button.on { outline: 2px solid #fff; outline-offset: 2px; background-clip: padding-box; }

/* ---------- chat ---------- */
#chat { grid-area: 1 / 2; width: clamp(300px, 20vw, 380px); display: flex; flex-direction: column; background: #1a1a1a; border-left: 1px solid #2a2a2a; }
#chat header { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; font-weight: 600; border-bottom: 1px solid #2a2a2a; }
#chat header button { font-size: 22px; line-height: 1; }
#messages { flex: 1; overflow-y: auto; padding: 12px 14px; }
#messages p { margin: 0 0 10px; overflow-wrap: anywhere; }
#messages b { display: block; font-size: 12px; color: #999; font-weight: 500; }
#messages .me b { color: #6fb3ff; }
#chat-input { width: 100%; padding: 12px 14px; background: #222; color: inherit; border: 0; border-top: 1px solid #2a2a2a; font: inherit; }

/* ---------- bottom toolbar ---------- */
#toolbar { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; padding: 6px 12px; background: #1a1a1a; }
.group { display: flex; align-items: center; gap: 4px; }
.tb { position: relative; display: flex; flex-direction: column; align-items: center; gap: 3px; min-width: 76px; padding: 6px 8px; border-radius: 8px; font-size: 12px; color: #ddd; }
.tb:hover { background: #2c2c2c; }
a.tb { text-decoration: none; }
.tb:disabled { opacity: 0.4; cursor: default; }
.slash { display: none; }
.tb.off svg { color: #ff453a; }
.tb.off .slash { display: inline; }
.tb.share svg { color: #34c759; }
.tb.share.on svg { color: #ff453a; }
.tb.danger { color: #ff6b6b; }
#net.good svg { color: #34c759; }
#net.fair svg { color: #ffcc00; }
#net.poor svg { color: #ff453a; }
#unread { position: absolute; top: 4px; right: 22px; width: 9px; height: 9px; border-radius: 50%; background: #ff453a; }
.leave { padding: 9px 18px; border-radius: 8px; background: #e02828; color: #fff; font-weight: 600; }
.leave:hover { background: #c41f1f; }

#toast { position: fixed; z-index: 10; left: 50%; bottom: 90px; transform: translateX(-50%); padding: 10px 16px; border-radius: 8px; background: #333; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5); }

.modal { position: fixed; z-index: 20; inset: 0; display: grid; place-items: center; padding: 16px; background: rgba(0, 0, 0, 0.55); }
.modal .card { width: min(480px, 100%); max-height: 100%; overflow-y: auto; padding: 0 22px 18px; border-radius: 14px; background: #1c1c1c; border: 1px solid #2e2e2e; box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6); }
.modal header { display: flex; justify-content: space-between; align-items: center; margin: 0 -22px 8px; padding: 14px 22px; font-size: 17px; font-weight: 600; border-bottom: 1px solid #2a2a2a; }
.modal header button { font-size: 24px; line-height: 1; }
.modal label { display: block; margin: 12px 0; color: #bbb; font-size: 13px; }
.modal select { display: block; width: 100%; margin-top: 4px; padding: 9px 10px; border: 1px solid #333; border-radius: 8px; background: #111; color: #eee; font: inherit; font-size: 14px; }
.modal fieldset { margin: 14px 0; padding: 4px 12px 2px; border: 1px solid #2e2e2e; border-radius: 10px; }
.modal legend { padding: 0 6px; color: #bbb; font-size: 13px; }
.modal .radio { display: grid; grid-template-columns: auto 1fr; column-gap: 8px; margin: 10px 0; cursor: pointer; }
.modal .radio input { grid-row: span 2; margin-top: 3px; accent-color: #0e71eb; }
.modal .radio b { color: #eee; font-size: 14px; font-weight: 600; }
.modal .radio small { color: #888; }
#set-now { margin: 14px 0 0; padding: 8px 10px; border-radius: 8px; background: #141414; color: #8fbfff; font-size: 13px; }

#old-app { position: fixed; z-index: 10; top: 0; left: 0; right: 0; padding: 8px 16px; background: #b8860b; color: #fff; text-align: center; font-weight: 600; text-decoration: none; }

.left-screen { grid-column: 1 / -1; grid-row: 1 / -1; display: grid; place-content: center; gap: 16px; text-align: center; }
.left-screen button { padding: 10px 18px; border-radius: 8px; background: #0e71eb; }

/* small laptops / tablets: cameras go under the shared screen, chat floats over the stage */
@media (max-width: 1100px) {
  #stage.has-screen { grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) clamp(80px, 16vh, 140px); }
  #stage.has-screen #tiles { flex-direction: row; justify-content: center; overflow: hidden; }
  #stage.has-screen .tile { width: auto; height: 100%; }
}
@media (max-width: 900px) {
  #chat { position: fixed; z-index: 5; top: 0; right: 0; bottom: 64px; width: min(340px, 100%); box-shadow: -4px 0 16px rgba(0, 0, 0, 0.5); }
}
@media (max-width: 700px) {
  .tb { min-width: 0; padding: 6px; }
  .tb span { display: none; }
  #toolbar { padding: 6px; }
  .leave { padding: 9px 12px; }
  #local-tile { width: 110px; }
  #stage { padding: 4px; gap: 4px; }
  #stage.gallery #tiles { grid-template-columns: 1fr; }
  #chat { width: 100%; }
}
/* very short windows (landscape phone, small laptop with big zoom) */
@media (max-height: 500px) {
  .tb span { display: none; }
  .tb { padding: 4px 6px; }
}