:root {
  --bg: #f3f5f4; --panel: #ffffff; --line: #e1e6e3; --text: #17211c; --muted: #66736c;
  --accent: #0b7a57; --accent-ink: #ffffff; --accent-soft: #e3f4ec;
  --out: #d8f3e3; --in: #ffffff; --chat-bg: #ece9e2;
  --danger: #b3261e; --warn-bg: #fff4d6; --warn-ink: #6b4e00;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111614; --panel: #1a211e; --line: #2b3530; --text: #e8eeeb; --muted: #94a39b;
    --accent: #2fb886; --accent-ink: #06231a; --accent-soft: #17352b;
    --out: #124d3a; --in: #222b27; --chat-bg: #0e1311;
    --danger: #ff8a80; --warn-bg: #3b3210; --warn-ink: #f3dc8c;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; font: 14px/1.45 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif; color: var(--text); background: var(--bg); display: flex; flex-direction: column; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }

.top { display: flex; align-items: center; gap: 20px; padding: 0 16px; height: 52px; background: var(--panel); border-bottom: 1px solid var(--line); flex: none; }
.brand { font-weight: 650; display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.logo { width: 26px; height: 26px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 700; }
#nav { display: flex; gap: 2px; flex: 1; }
#nav button { border: 0; background: none; padding: 8px 12px; border-radius: 8px; cursor: pointer; color: var(--muted); font-weight: 550; }
#nav button:hover { background: var(--bg); }
#nav button.on { color: var(--accent); background: var(--accent-soft); }
.conn { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; white-space: nowrap; }
.conn .dot { width: 8px; height: 8px; border-radius: 50%; background: #c9a227; }
.conn.ok .dot { background: #1faa6b; }
.conn.bad .dot { background: var(--danger); }

main { flex: 1; min-height: 0; display: flex; }
.page { flex: 1; overflow: auto; padding: 24px; }
.page-inner { max-width: 980px; margin: 0 auto; display: grid; gap: 18px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h2 { margin: 0 0 4px; font-size: 16px; }
.card .sub { color: var(--muted); margin: 0 0 14px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
@media (max-width: 900px) { .two { grid-template-columns: 1fr; } }

/* Forms */
.field { display: grid; gap: 4px; margin-bottom: 12px; }
.field > span { font-weight: 550; font-size: 13px; }
.field small { color: var(--muted); }
input[type=text], input[type=password], input[type=number], input[type=url], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
textarea { resize: vertical; min-height: 70px; }
textarea.mono, pre, code { font-family: Consolas, "Cascadia Mono", monospace; font-size: 12.5px; }
.row { display: flex; gap: 8px; align-items: center; }
.row > * { flex: 1; min-width: 0; }
.row > .fixed { flex: none; }
.btn { border: 1px solid var(--line); background: var(--panel); padding: 8px 14px; border-radius: 8px; cursor: pointer; font-weight: 550; white-space: nowrap; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.small { padding: 4px 10px; font-size: 12.5px; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: .55; cursor: default; }
.actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 6px; }
.note { background: var(--warn-bg); color: var(--warn-ink); padding: 10px 12px; border-radius: 8px; font-size: 13px; }
.note.info { background: var(--accent-soft); color: var(--text); }
.muted { color: var(--muted); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: 11.5px; font-weight: 600; background: var(--bg); color: var(--muted); border: 1px solid var(--line); }
.badge.ok { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.badge.bad { color: var(--danger); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 600; }
pre { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px; overflow: auto; max-height: 280px; margin: 8px 0 0; white-space: pre-wrap; word-break: break-word; }
details > summary { cursor: pointer; color: var(--muted); }
.copy { display: flex; gap: 8px; align-items: center; }
.copy code { flex: 1; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; overflow: auto; white-space: nowrap; }

/* Inbox */
.inbox { flex: 1; display: grid; grid-template-columns: 330px 1fr; min-height: 0; min-width: 0; }
.side { border-right: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; min-height: 0; }
.side-top { padding: 12px; display: grid; gap: 8px; border-bottom: 1px solid var(--line); }
.conv-list { flex: 1; overflow: auto; }
.conv { display: grid; grid-template-columns: 40px 1fr auto; gap: 10px; padding: 10px 12px; cursor: pointer; border-bottom: 1px solid var(--line); align-items: center; }
.conv:hover { background: var(--bg); }
.conv.on { background: var(--accent-soft); }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 650; }
.conv .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv .last { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv .meta { text-align: right; font-size: 11.5px; color: var(--muted); display: grid; gap: 4px; justify-items: end; }
.unread { background: var(--accent); color: var(--accent-ink); border-radius: 99px; min-width: 20px; padding: 0 6px; font-weight: 700; font-size: 11.5px; text-align: center; }
.via { font-size: 11px; color: var(--muted); }
.empty { padding: 40px 20px; text-align: center; color: var(--muted); }

.chat { display: flex; flex-direction: column; min-height: 0; min-width: 0; background: var(--chat-bg); }
.chat-head { background: var(--panel); border-bottom: 1px solid var(--line); padding: 10px 16px; display: flex; align-items: center; gap: 12px; }
.chat-head .who { flex: 1; min-width: 0; }
.chat-head .who b { display: block; }
.chat-head .who span { color: var(--muted); font-size: 12.5px; }
.msgs { flex: 1; overflow: auto; padding: 16px 8%; display: flex; flex-direction: column; gap: 6px; }
.day { align-self: center; background: var(--panel); border: 1px solid var(--line); color: var(--muted); border-radius: 99px; padding: 2px 12px; font-size: 12px; margin: 8px 0; }
.msg { max-width: 72%; padding: 7px 10px 5px; border-radius: 10px; background: var(--in); align-self: flex-start; box-shadow: 0 1px 1px rgba(0,0,0,.08); overflow-wrap: anywhere; }
.msg.out { background: var(--out); align-self: flex-end; }
.msg.failed { outline: 1px solid var(--danger); }
.msg .body { white-space: pre-wrap; }
.msg .hdr { font-weight: 650; margin-bottom: 2px; }
.msg .ftr { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.msg .tag { font-size: 11.5px; color: var(--muted); margin-bottom: 2px; }
.msg .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.msg .chip { border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 3px 10px; font-size: 12.5px; color: var(--accent); font-weight: 550; }
.msg .media { display: block; margin-bottom: 4px; }
.msg img.media { max-width: 260px; max-height: 220px; border-radius: 8px; }
.msg .foot { display: flex; justify-content: flex-end; gap: 6px; font-size: 11px; color: var(--muted); margin-top: 2px; }
.msg .foot .read { color: #2b8fe6; }
.msg .err { color: var(--danger); font-size: 12.5px; margin-top: 4px; }
.composer { background: var(--panel); border-top: 1px solid var(--line); padding: 10px 16px 12px; display: grid; gap: 8px; position: relative; }
.tools { display: flex; flex-wrap: wrap; gap: 6px; }
.send-row { display: flex; gap: 8px; align-items: flex-end; }
.send-row textarea { min-height: 42px; max-height: 160px; resize: none; }
.popover { position: absolute; bottom: 100%; left: 16px; width: 360px; max-height: 300px; overflow: auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 28px rgba(0,0,0,.18); z-index: 5; }
.popover button { display: block; width: 100%; text-align: left; border: 0; background: none; padding: 9px 12px; cursor: pointer; border-bottom: 1px solid var(--line); }
.popover button:hover { background: var(--bg); }
.popover button b { display: block; }
.popover button span { color: var(--muted); font-size: 12.5px; }

/* Modal and toast */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: grid; place-items: center; padding: 20px; z-index: 20; }
.modal { background: var(--panel); border-radius: 12px; width: min(560px, 100%); max-height: 90vh; display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal header { padding: 14px 18px; border-bottom: 1px solid var(--line); font-weight: 650; font-size: 15px; display: flex; justify-content: space-between; align-items: center; }
.modal header button { border: 0; background: none; font-size: 20px; cursor: pointer; color: var(--muted); line-height: 1; }
.modal .content { padding: 16px 18px; overflow: auto; }
.modal footer { padding: 12px 18px; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: 8px; }
.preview { background: var(--chat-bg); border-radius: 8px; padding: 10px; margin-bottom: 12px; }
.preview .msg { max-width: 100%; }
#toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); display: grid; gap: 8px; z-index: 40; }
#toast div { background: #1d2622; color: #fff; padding: 10px 16px; border-radius: 8px; box-shadow: 0 6px 20px rgba(0,0,0,.3); max-width: 520px; }
#toast div.bad { background: #8c1d18; }
.progress { height: 6px; background: var(--bg); border-radius: 99px; overflow: hidden; min-width: 100px; }
.progress i { display: block; height: 100%; background: var(--accent); }

.user-box { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); white-space: nowrap; }
.login-wrap { margin: auto; width: min(400px, 92vw); }
.login-wrap .card { padding: 26px; }
.login-wrap h1 { font-size: 20px; margin: 0 0 4px; display: flex; align-items: center; gap: 10px; }
.login-wrap .err { color: var(--danger); min-height: 20px; margin: 6px 0; }