:root { --bg:#14151a; --panel:#1d1f26; --line:#2b2e38; --fg:#e6e6e6; --dim:#9aa0ad; --accent:#7aa2f7; --err:#f7768e; }
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); font: 15px/1.4 system-ui, sans-serif; }
a { color: var(--accent); text-decoration: none; }
button { font: inherit; color: var(--fg); background: var(--line); border: 0; border-radius: 6px; padding: .4rem .8rem; cursor: pointer; }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); color: #101318; }
button.link { background: none; color: var(--accent); padding: 0; }
input, select { font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: .45rem .6rem; width: 100%; }
code { background: var(--bg); padding: .1rem .3rem; border-radius: 4px; word-break: break-all; }
.boot, .notice { color: var(--dim); padding: 2rem; text-align: center; }
.error { color: var(--err); }
.small { font-size: .85rem; margin: .3rem 0; }
.shell { display: flex; flex-direction: column; height: 100vh; }
header { display: flex; align-items: center; gap: 1rem; padding: .5rem 1rem; background: var(--panel); border-bottom: 1px solid var(--line); }
header .brand { font-weight: 700; color: var(--fg); }
header nav a { margin-right: .8rem; }
header .who { margin-left: auto; color: var(--dim); font-size: .9rem; }
main { flex: 1; min-height: 0; }
.card { max-width: 380px; margin: 3rem auto; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 1.2rem; display: flex; flex-direction: column; gap: .8rem; }
.tabs { display: flex; gap: .4rem; }
.tabs button { flex: 1; }
.tabs button.on { background: var(--accent); color: #101318; }
label { display: flex; flex-direction: column; gap: .25rem; font-size: .9rem; color: var(--dim); }
.rooms { display: grid; grid-template-columns: 260px 1fr; height: 100%; }
aside { background: var(--panel); border-right: 1px solid var(--line); padding: .6rem; overflow-y: auto; display: flex; flex-direction: column; gap: .2rem; }
.space { color: var(--dim); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; margin: .6rem .4rem .2rem; }
.room { display: flex; justify-content: space-between; align-items: center; padding: .35rem .6rem; border-radius: 6px; color: var(--fg); }
.room.on, .room:hover { background: var(--line); }
.unread { background: var(--accent); color: #101318; border-radius: 10px; padding: 0 .45rem; font-size: .75rem; }
.invite { display: flex; justify-content: space-between; align-items: center; gap: .5rem; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: .5rem; }
.new { margin-top: auto; display: flex; flex-direction: column; gap: .4rem; padding-top: .8rem; border-top: 1px solid var(--line); }
.check { flex-direction: row; align-items: center; gap: .4rem; }
.check input { width: auto; }
section { display: flex; flex-direction: column; min-height: 0; }
.room-head { display: flex; align-items: center; gap: .8rem; padding: .6rem 1rem; border-bottom: 1px solid var(--line); }
.room-head h2 { margin: 0; font-size: 1.1rem; }
.room-head .topic, .room-head .members { color: var(--dim); font-size: .85rem; }
.room-head .members { margin-left: auto; }
.invite-box { width: 240px; }
.timeline { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.msg .sender { font-weight: 600; margin-right: .5rem; }
.msg.mine .sender { color: var(--accent); }
.msg .time { color: var(--dim); font-size: .8rem; }
.msg .body { white-space: pre-wrap; word-break: break-word; }
.composer { display: flex; gap: .5rem; padding: .8rem 1rem; border-top: 1px solid var(--line); }
.admin { max-width: 900px; margin: 0 auto; padding: 1rem; display: flex; flex-direction: column; gap: 2rem; }
.admin table { width: 100%; border-collapse: collapse; margin-top: .6rem; }
.admin th, .admin td { text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--line); }
.admin tr.off { color: var(--dim); }
.hint { color: var(--dim); font-size: .9rem; }
.issued { background: var(--panel); border: 1px solid var(--accent); border-radius: 6px; padding: .6rem; }
#blazor-error-ui { position: fixed; bottom: 0; left: 0; right: 0; background: var(--err); color: #101318; padding: .6rem 1rem; }
@media (max-width: 720px) { .rooms { grid-template-columns: 1fr; } aside { max-height: 40vh; border-right: 0; border-bottom: 1px solid var(--line); } }