:root {
  --bg: #f5f6f8; --card: #fff; --fg: #15171c; --mut: #6b7280; --line: #e2e5ea;
  --acc: #2f5bea; --accfg: #fff; --ok: #1a9d56; --bad: #d64545;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111317; --card: #1a1d23; --fg: #eceef2; --mut: #8b93a1; --line: #2a2e36; --acc: #5b86ff; --accfg: #0b1020; }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--fg); font: 15px/1.45 -apple-system, "Segoe UI", system-ui, sans-serif; }
#app { max-width: 520px; margin: 0 auto; padding: 24px 16px 48px; }
header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 12px; }
h1 { margin: 0; font-size: 22px; letter-spacing: -.02em; }
h2 { font-size: 15px; margin: 28px 0 4px; }
nav { display: flex; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
nav button { border: 0; background: none; color: var(--mut); padding: 6px 12px; border-radius: 8px; font: inherit; cursor: pointer; }
nav button.on { background: var(--acc); color: var(--accfg); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin-bottom: 12px; display: grid; gap: 12px; }
.card.alert { border-color: var(--acc); }
label { display: grid; gap: 6px; font-size: 13px; color: var(--mut); }
label.check { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--fg); }
input:not([type=checkbox]) { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--fg); font: inherit; }
input:focus { outline: 2px solid var(--acc); outline-offset: -1px; }
button, .btn { padding: 9px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--fg); font: inherit; cursor: pointer; text-decoration: none; display: inline-block; text-align: center; }
button.primary, .btn.primary { background: var(--acc); color: var(--accfg); border-color: var(--acc); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row input { flex: 1; min-width: 0; }
#connect-form { display: grid; gap: 12px; }
.big { font-size: 56px; font-weight: 700; letter-spacing: .08em; line-height: 1; font-variant-numeric: tabular-nums; }
.hint { color: var(--mut); font-size: 13px; margin: 0; }
.msg { min-height: 1.4em; color: var(--bad); margin: 8px 0 0; font-size: 14px; }
.msg.ok { color: var(--ok); }
.status { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--mut); }
.dot.on { background: var(--ok); }
details summary { cursor: pointer; font-size: 13px; color: var(--mut); margin-bottom: 8px; }
[hidden] { display: none !important; }

#viewer { position: fixed; inset: 0; background: #000; z-index: 10; }
#screen { width: 100%; height: 100%; object-fit: contain; display: block; outline: none; cursor: default; }
#bar { position: absolute; top: 0; left: 50%; transform: translate(-50%, -100%); transition: transform .2s; background: rgba(20,22,27,.92); color: #eee; padding: 8px 12px; border-radius: 0 0 12px 12px; display: flex; gap: 12px; align-items: center; z-index: 2; font-size: 13px; }
#bar:hover, #bar.show { transform: translate(-50%, 0); }
#bar::before { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 14px; } /* hover zone */
#bar button { padding: 5px 10px; font-size: 13px; }

#dock { position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); display: flex; gap: 6px; padding: 6px; background: rgba(20,22,27,.82); border-radius: 12px 12px 0 0; z-index: 3; }
#dock button { padding: 6px 12px; font-size: 13px; background: #2a2e36; color: #eee; border-color: #3a3f49; }
#dock button.on { background: var(--acc); color: var(--accfg); border-color: var(--acc); }
#share { position: absolute; bottom: 46px; left: 50%; transform: translateX(-50%); width: min(440px, calc(100% - 24px)); background: rgba(24,26,32,.96); color: #eee; border: 1px solid #3a3f49; border-radius: 14px; padding: 12px; display: grid; gap: 8px; z-index: 3; max-height: 60vh; overflow: auto; }
#share textarea { width: 100%; resize: vertical; padding: 8px 10px; border-radius: 10px; border: 1px dashed #5a6070; background: #14161b; color: #eee; font: inherit; }
#share.drag textarea { border-color: var(--acc); background: #1b2133; }
#share .hint { margin-left: 8px; }
.sh-head { display: flex; align-items: baseline; }
.sh-item { display: flex; align-items: center; gap: 8px; font-size: 13px; padding: 6px 8px; background: #1b1e25; border-radius: 8px; }
.sh-item span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sh-item img { height: 36px; border-radius: 4px; }
.sh-item button { padding: 3px 8px; font-size: 12px; }
.sh-item.err { color: #ff8b8b; }