/* New Era brand: Dark Blue #21264C, Light Blue #167BC0, White. Montserrat only. */
:root { --dark: #21264C; --light: #167BC0; --white: #FFFFFF; }
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font-family: Montserrat, system-ui, sans-serif; font-weight: 400; color: var(--dark); background: var(--white); font-size: 15px; }
h1, h2 { font-weight: 800; text-transform: uppercase; margin: 0; }
button { font-family: inherit; }
[hidden] { display: none !important; }
code, pre { font-family: ui-monospace, Menlo, monospace; font-size: 13px; border: 1px solid var(--dark); border-radius: 6px; padding: 0 4px; }
pre { padding: 8px; white-space: pre-wrap; }

.btn { background: var(--light); color: var(--white); border: 0; border-radius: 999px; padding: 10px 20px; font-weight: 600; cursor: pointer; }
.btn-outline { background: var(--white); color: var(--dark); border: 2px solid var(--light); padding: 6px 14px; }
.btn-small { padding: 6px 14px; font-size: 13px; }
.icon-btn { background: transparent; border: 0; color: inherit; font-size: 22px; cursor: pointer; line-height: 1; }
.link-btn { background: none; border: 0; color: var(--white); text-decoration: underline; cursor: pointer; margin-top: auto; padding: 12px 0; text-align: left; }
.pill { border: 2px solid var(--light); border-radius: 999px; padding: 4px 12px; font-size: 12px; font-weight: 600; }
.error { color: var(--dark); font-weight: 600; }

.login { min-height: 100%; display: grid; place-items: center; background: var(--dark); padding: 16px; }
.login-card { background: var(--white); border-radius: 20px; padding: 32px; max-width: 420px; width: 100%; }
.login-card h1 { font-size: 28px; color: var(--dark); margin-bottom: 12px; }
.login-card label { display: block; font-weight: 600; margin: 16px 0 6px; }
.login-card input { width: 100%; padding: 10px 14px; border: 2px solid var(--dark); border-radius: 999px; font: inherit; margin-bottom: 16px; }

.app { display: grid; grid-template-columns: 260px 1fr auto; height: 100vh; }
.sidebar { background: var(--dark); color: var(--white); padding: 20px 16px; display: flex; flex-direction: column; gap: 6px; overflow-y: auto; }
.brand { font-weight: 800; font-size: 18px; letter-spacing: 1px; }
.me { font-size: 13px; margin-bottom: 12px; }
.sidebar h2 { font-size: 12px; margin-top: 14px; }
.section-head { display: flex; justify-content: space-between; align-items: center; }
.nav-list { list-style: none; margin: 0; padding: 0; }
.nav-list button { width: 100%; text-align: left; background: transparent; color: var(--white); border: 0; border-radius: 10px; padding: 6px 10px; cursor: pointer; font-size: 14px; display: flex; gap: 8px; align-items: center; }
.nav-list button[aria-current="true"] { background: var(--white); color: var(--dark); font-weight: 600; }
.dot { width: 8px; height: 8px; border-radius: 50%; border: 1px solid var(--white); flex: none; }
.dot.on { background: var(--light); border-color: var(--light); }
.unread { margin-left: auto; background: var(--light); color: var(--white); border-radius: 999px; font-size: 11px; padding: 1px 7px; font-weight: 600; }

.main { display: flex; flex-direction: column; min-width: 0; border-right: 1px solid var(--dark); }
.channel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 20px; border-bottom: 1px solid var(--dark); }
.channel-head h1 { font-size: 18px; }
.topic { margin: 2px 0 0; font-size: 13px; }
.head-actions { display: flex; gap: 10px; align-items: center; }
.banner, .conn { margin: 10px 20px 0; border: 2px solid var(--light); border-radius: 14px; padding: 10px 14px; font-weight: 600; font-size: 14px; }
.messages { list-style: none; margin: 0; padding: 12px 20px; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 4px; }
.msg { display: grid; grid-template-columns: 36px 1fr; gap: 10px; padding: 8px; border-radius: 12px; }
.msg.pending { border: 2px dashed var(--light); }
.avatar { width: 36px; height: 36px; border-radius: 10px; background: var(--dark); color: var(--white); display: grid; place-items: center; font-weight: 800; font-size: 13px; }
.avatar.agent { background: var(--light); }
.meta { display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.author { font-weight: 600; }
.badge { border: 1px solid var(--light); color: var(--dark); border-radius: 999px; font-size: 10px; font-weight: 600; padding: 0 6px; text-transform: uppercase; }
.time { font-size: 12px; }
.body { white-space: pre-wrap; word-wrap: break-word; line-height: 1.45; }
.mention { color: var(--light); font-weight: 600; }
.chip { display: inline-block; margin-top: 4px; font-size: 12px; border: 1px solid var(--dark); border-radius: 999px; padding: 1px 8px; }
.reactions { display: flex; gap: 6px; margin-top: 4px; }
.reaction { border: 1px solid var(--light); border-radius: 999px; padding: 0 8px; font-size: 12px; background: var(--white); color: var(--dark); cursor: pointer; }
.actions { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.thread-link { background: none; border: 0; padding: 0; margin-top: 4px; color: var(--light); font-weight: 600; cursor: pointer; font-size: 13px; }
.status-line { min-height: 20px; margin: 0 20px; font-size: 13px; font-weight: 600; }
.composer { display: flex; gap: 10px; padding: 10px 20px 18px; align-items: flex-end; }
.composer textarea { flex: 1; resize: none; font: inherit; border: 2px solid var(--dark); border-radius: 16px; padding: 10px 14px; color: var(--dark); }

.panel { width: 380px; display: flex; flex-direction: column; }
.panel-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--dark); }
.panel-head h2 { font-size: 15px; }
.panel-body { overflow-y: auto; padding: 12px 16px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.card { border: 1px solid var(--dark); border-radius: 16px; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.card textarea { font: inherit; border: 1px solid var(--dark); border-radius: 10px; padding: 8px; min-height: 90px; color: var(--dark); }
.card .row { display: flex; gap: 8px; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; height: auto; min-height: 100vh; }
  .sidebar { max-height: 40vh; }
  .panel { width: 100%; border-top: 1px solid var(--dark); }
  .channel-head { flex-wrap: wrap; padding: 12px 16px; }
  .messages, .composer { padding-left: 16px; padding-right: 16px; }
}