:root {
  --bg: #1e1f22;
  --panel: #2b2d31;
  --panel2: #232428;
  --panel3: #313338;
  --text: #dbdee1;
  --muted: #949ba4;
  --border: rgba(255, 255, 255, 0.06);
  --accent: #5865f2;
  --danger: #ed4245;
  --shadow: rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: #0f0f10;
  color: var(--text);
}

.app {
  height: 100%;
  display: grid;
  grid-template-columns: 280px 1fr 260px;
  background: var(--bg);
}

.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.brand {
  padding: 18px 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.dot {
  width: 12px; height: 12px;
  border-radius: 99px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(88, 101, 242, 0.15);
}
.brand-text { font-weight: 700; letter-spacing: 0.2px; }

.section-title {
  padding: 14px 16px 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.8px;
  font-weight: 700;
}

.channels { padding: 0 10px; overflow: auto; flex: 1; }

.channel {
  padding: 10px 12px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  color: var(--muted);
  user-select: none;
}
.channel:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.channel.active { background: rgba(88,101,242,0.18); color: var(--text); }
.channel .hash { opacity: 0.8; }

.me {
  border-top: 1px solid var(--border);
  padding: 10px 12px;
  background: var(--panel2);
  display: flex;
  align-items: center;
  gap: 10px;
}
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  object-fit: cover;
  background: #111;
  border: 1px solid var(--border);
}
.me-meta { min-width: 0; flex: 1; }
.me-nick { font-weight: 700; line-height: 1.1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.me-sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

.icon-btn {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
}
.icon-btn:hover { background: rgba(255,255,255,0.06); }

.main {
  display: flex;
  flex-direction: column;
  background: var(--panel3);
}

.topbar {
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.12);
  backdrop-filter: blur(8px);
}
.topbar .hash { color: var(--muted); font-weight: 900; }
.room-title { font-weight: 800; }
.spacer { flex: 1; }
.pill {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.messages {
  flex: 1;
  overflow: auto;
  padding: 14px 12px 18px;
}

.msg {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 12px;
}
.msg:hover { background: rgba(255,255,255,0.03); }
.msg .avatar { width: 40px; height: 40px; border-radius: 14px; }

.msg-head {
  display: flex;
  gap: 10px;
  align-items: baseline;
}
.msg-name { font-weight: 800; }
.msg-time { color: var(--muted); font-size: 12px; }
.msg-text { margin-top: 4px; color: var(--text); white-space: pre-wrap; word-break: break-word; }

.system {
  margin: 10px 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.composer {
  padding: 10px 12px 12px;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.10);
}
.composer-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
}
.plus {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--muted);
}
.composer input {
  flex: 1;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 14px;
}
.send {
  border: 1px solid var(--border);
  background: var(--accent);
  color: white;
  border-radius: 12px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 700;
}
.send:hover { filter: brightness(1.06); }
.hint { margin-top: 6px; color: var(--muted); font-size: 12px; padding: 0 4px; }

.members {
  background: var(--panel);
  border-left: 1px solid var(--border);
  padding-bottom: 12px;
  overflow: auto;
}
.member-list { padding: 0 10px; }
.member {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 12px;
}
.member:hover { background: rgba(255,255,255,0.04); }
.member .avatar { width: 28px; height: 28px; border-radius: 10px; }
.member .name { font-weight: 700; }
.member .sub { color: var(--muted); font-size: 12px; margin-left: auto; }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: grid;
  place-items: center;
  padding: 24px;
}
.hidden { display: none; }
.modal-card {
  width: min(520px, 92vw);
  background: #111214;
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 24px 60px var(--shadow);
  padding: 18px;
}
.modal-title { font-weight: 900; font-size: 18px; margin-bottom: 14px; }
.field { display: grid; gap: 6px; margin: 12px 0; }
.field span { color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: 0.6px; }
.field input {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}
.row { display: flex; gap: 10px; align-items: center; margin-top: 14px; }
.btn {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 800;
  background: rgba(255,255,255,0.04);
  color: var(--text);
}
.btn.primary { background: var(--accent); border-color: transparent; color: white; }
.btn.ghost:hover { background: rgba(255,255,255,0.07); }
.btn.primary:hover { filter: brightness(1.06); }
.tiny { color: var(--muted); font-size: 12px; margin-top: 12px; }

@media (max-width: 980px) {
  .app { grid-template-columns: 280px 1fr; }
  .members { display: none; }
}
@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}