:root {
  --bg: #12151c;
  --panel: #1b1f2a;
  --panel-2: #232936;
  --border: #2d3442;
  --text: #e8eaf0;
  --muted: #8b93a7;
  --accent: #f0a452;
  --user: #2f5d8a;
  --assistant: #232936;
  --ok: #4caf50;
  --warn: #e57373;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; gap: 10px; align-items: center; }
.brand-emoji { font-size: 26px; }
h1 { font-size: 18px; }
.sub { color: var(--muted); font-size: 12px; }
.topbar nav a { color: var(--muted); text-decoration: none; margin-left: 14px; font-size: 14px; }
.topbar nav a:hover { color: var(--accent); }

/* --- chat --- */
.chat-page main { flex: 1; overflow-y: auto; padding: 18px; max-width: 860px; width: 100%; margin: 0 auto; }
.messages { display: flex; flex-direction: column; gap: 10px; }

.msg { max-width: 78%; padding: 9px 13px; border-radius: 14px; line-height: 1.45; white-space: pre-wrap; word-break: break-word; font-size: 15px; }
.msg .meta { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }
.msg.user { align-self: flex-end; background: var(--user); border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--assistant); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg.error { align-self: flex-start; background: #3a2424; border: 1px solid #5c3535; }

.composer {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}
.composer textarea {
  flex: 1;
  resize: none;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 20px;
  padding: 10px 16px;
  font-size: 15px;
  font-family: inherit;
  outline: none;
  max-height: 120px;
}
.composer textarea:focus { border-color: var(--accent); }
.send-btn, .icon-btn {
  background: var(--accent);
  border: none;
  color: #1b1f2a;
  border-radius: 24px;
  width: 44px;
  height: 44px;
  font-size: 18px;
  cursor: pointer;
  flex-shrink: 0;
}
.icon-btn { background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); }
.send-btn:hover { filter: brightness(1.1); }

.typing {
  position: fixed;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10;
}
.typing .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  animation: blink 1.2s infinite;
}
.typing .dot:nth-child(2) { animation-delay: .2s; }
.typing .dot:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%,80%,100% { opacity: .2; } 40% { opacity: 1; } }
.hidden { display: none !important; }

/* --- admin / settings --- */
.admin-main, .settings-main { max-width: 1100px; width: 100%; margin: 0 auto; padding: 20px; flex: 1; overflow-y: auto; }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.tab {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
}
.tab.active { background: var(--accent); color: #1b1f2a; border-color: var(--accent); }
.admin-search { display: flex; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.admin-search input, .admin-search select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
}
.admin-search input { flex: 1; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--panel); }
td { color: var(--text); }
tr:hover td { background: var(--panel-2); }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 18px;
}
.card h2 { font-size: 16px; margin-bottom: 12px; }
.card label { display: block; margin: 10px 0 4px; font-size: 14px; color: var(--muted); }
.card input[type=text], .card input[type=file] {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 15px;
  outline: none;
  margin-bottom: 10px;
}
.card pre {
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 8px;
  font-size: 13px;
  overflow-x: auto;
}
.btn {
  background: var(--accent);
  color: #1b1f2a;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}
.btn:hover { filter: brightness(1.1); }
.hint { color: var(--muted); font-size: 13px; margin: 8px 0; }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
.muted { color: var(--muted); }