:root {
  --bg: #0b0e14;
  --bg-2: #11151f;
  --bg-3: #171c29;
  --border: #232a3a;
  --text: #e6e9f0;
  --text-2: #9aa3b5;
  --accent: #f5c518;
  --accent-2: #ffd84d;
  --danger: #ef4444;
  --ok: #22c55e;
  --radius: 12px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 15px;
}
#app { height: 100vh; display: flex; flex-direction: column; }
.hidden { display: none !important; }
.muted { color: var(--text-2); }
.spacer { flex: 1; }

/* ---------- buttons / inputs ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: background .15s, border-color .15s;
}
.btn:hover { background: #1f2635; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #111; font-weight: 600; }
.btn-primary:hover { background: var(--accent-2); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-2); }
.btn-ghost:hover { color: var(--text); background: var(--bg-3); }
.btn-block { width: 100%; }
.btn-icon { padding: 6px 10px; font-size: 16px; }
.btn-sm { padding: 4px 10px; font-size: 12.5px; }
input, select, textarea {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }

/* ---------- auth ---------- */
#view-auth {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: radial-gradient(1000px 500px at 50% -10%, #1b2130 0%, var(--bg) 60%);
  padding: 20px;
}
.auth-card {
  width: 100%; max-width: 400px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
}
.auth-brand { text-align: center; margin-bottom: 24px; }
.brand-mark {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #b8860b);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 10px;
}
.brand-mark.small { width: 32px; height: 32px; font-size: 16px; border-radius: 9px; margin: 0; }
.auth-brand h1 { font-size: 22px; letter-spacing: .5px; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.auth-tab {
  flex: 1; padding: 9px; background: transparent; border: none;
  color: var(--text-2); cursor: pointer; font-size: 14px;
  border-bottom: 2px solid transparent;
}
.auth-tab.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-2); }
.error-text { color: var(--danger); font-size: 13px; margin-top: 12px; text-align: center; }
.ok-text { color: var(--ok); font-size: 13px; margin-left: 10px; }
.auth-footer { margin-top: 24px; font-size: 12.5px; }

/* ---------- app layout ---------- */
#view-app { display: flex; height: 100vh; overflow: hidden; }
#sidebar {
  width: 280px; min-width: 280px;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: 14px;
  gap: 12px;
}
.sidebar-head { display: flex; align-items: center; gap: 10px; }
.sidebar-title { font-weight: 700; letter-spacing: .4px; }
.chat-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.chat-item {
  display: flex; align-items: center; gap: 6px;
  padding: 9px 8px 9px 12px; border-radius: 8px; cursor: pointer;
  color: var(--text-2); font-size: 13.5px;
  border: 1px solid transparent;
}
.chat-item-title { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item-del {
  background: none; border: none; color: var(--text-2);
  cursor: pointer; font-size: 12px; padding: 3px 7px;
  border-radius: 6px; opacity: 0; transition: opacity .15s, background .15s;
  flex-shrink: 0;
}
.chat-item:hover .chat-item-del, .chat-item.active .chat-item-del { opacity: 1; }
.chat-item-del:hover { background: #3a1620; color: var(--danger); }
@media (hover: none) { .chat-item-del { opacity: .85; } }
.chat-item:hover { background: var(--bg-3); color: var(--text); }
.chat-item.active { background: var(--bg-3); color: var(--text); border-color: var(--border); }
.sidebar-foot { border-top: 1px solid var(--border); padding-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.user-chip { display: flex; gap: 10px; align-items: center; }
.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: #111;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; text-transform: uppercase;
}
.user-meta { min-width: 0; }
.user-name { font-size: 14px; font-weight: 600; }
.user-email { font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 170px; }
.sidebar-actions { display: flex; gap: 6px; }
.sidebar-actions .btn { flex: 1; font-size: 13px; }

#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
#chat-header {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
#btn-menu { display: none; align-items: center; justify-content: center; }
.chat-title { font-weight: 600; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-right { display: flex; gap: 8px; align-items: center; }
.model-select { max-width: 230px; }
.model-select:disabled { opacity: .55; cursor: not-allowed; }
.announcement {
  background: #2a230f; border-bottom: 1px solid #4d4014;
  color: var(--accent-2); padding: 8px 18px; font-size: 13px; text-align: center;
}

.messages { flex: 1; overflow-y: auto; padding: 24px 0; }
.msg-row { display: flex; padding: 6px 24px; }
.msg-row.user { justify-content: flex-end; }
.msg {
  max-width: 760px; width: fit-content;
  padding: 12px 16px; border-radius: var(--radius);
  line-height: 1.6; font-size: 14.5px;
  overflow-wrap: break-word;
}
.msg.user { background: #243044; border-bottom-right-radius: 4px; }
.msg.assistant { background: var(--bg-2); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg .msg-meta { font-size: 11px; color: var(--text-2); margin-top: 8px; }
.tool-pills { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.tool-pill {
  display: inline-flex; align-items: center; gap: 4px; max-width: 100%;
  font-size: 11.5px; color: var(--text-2);
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: 20px; padding: 2px 10px;
}
.tool-pill.running { color: var(--accent-2); border-color: #4d4014; animation: pillpulse 1.4s ease-in-out infinite; }
.tool-pill.done { color: var(--ok); }
.tool-pill.failed { color: var(--danger); border-color: var(--danger); }
.tool-preview {
  font-family: "JetBrains Mono", "Fira Code", monospace; font-size: 11px; opacity: .85;
  max-width: 48ch; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
@keyframes pillpulse { 50% { opacity: .55; } }
.msg-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 12.5px; color: var(--text-2); margin-bottom: 6px;
}
.msg-status .blink { animation: blink 1s infinite; }
.typing { display: inline-block; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .2; } }

/* markdown-ish */
.msg pre {
  background: #0a0d13; border: 1px solid var(--border);
  border-radius: 8px; padding: 12px; overflow-x: auto;
  margin: 8px 0; font-size: 13px;
}
.msg code { font-family: "JetBrains Mono", "Fira Code", monospace; font-size: 13px; }
.msg p code, .msg li code { background: var(--bg-3); padding: 1px 6px; border-radius: 5px; }
.msg h1, .msg h2, .msg h3 { margin: 12px 0 6px; }
.msg ul, .msg ol { padding-left: 22px; margin: 6px 0; }
.msg p { margin: 6px 0; }
.msg a { color: var(--accent-2); }
.msg blockquote { border-left: 3px solid var(--border); padding-left: 12px; color: var(--text-2); margin: 8px 0; }
.msg table { border-collapse: collapse; margin: 8px 0; }
.msg th, .msg td { border: 1px solid var(--border); padding: 5px 10px; font-size: 13px; }
.msg th { background: var(--bg-3); font-weight: 600; text-align: left; }
.tbl-wrap { overflow-x: auto; margin: 8px 0; }
.msg .tbl-wrap table { margin: 0; }

#composer-wrap { border-top: 1px solid var(--border); background: var(--bg-2); padding: 10px 24px 10px; }
#composer { display: flex; gap: 10px; max-width: 860px; margin: 0 auto; align-items: flex-end; }
#input { flex: 1; resize: none; max-height: 180px; padding: 11px 14px; }
.btn-send { padding: 10px 16px; font-size: 15px; }
.btn-attach { font-size: 17px; padding: 8px 11px; align-self: flex-end; }
.attach-chips {
  display: flex; gap: 8px; flex-wrap: wrap;
  max-width: 860px; margin: 0 auto 10px;
}
.attach-chip {
  display: flex; align-items: center; gap: 7px;
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: 10px; padding: 5px 8px 5px 6px; font-size: 12.5px;
  max-width: 220px;
}
.attach-chip img { width: 30px; height: 30px; object-fit: cover; border-radius: 6px; }
.attach-chip .file-ico { font-size: 18px; }
.attach-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.attach-x { background: none; border: none; color: var(--text-2); cursor: pointer; font-size: 11px; padding: 2px 4px; border-radius: 4px; }
.attach-x:hover { color: var(--danger); background: #3a1620; }
.msg-atts { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.attach-img { max-width: 260px; max-height: 200px; border-radius: 10px; border: 1px solid var(--border); display: block; }
.file-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 11px; font-size: 12.5px;
}
.backdrop {
  position: fixed; inset: 0; background: rgba(4, 6, 10, .55);
  z-index: 15; backdrop-filter: blur(2px);
}
.composer-hint { text-align: center; font-size: 11.5px; margin-top: 6px; }

.empty-state { text-align: center; margin-top: 15vh; color: var(--text-2); }
.empty-state .brand-mark { margin-bottom: 14px; }
.empty-state h2 { color: var(--text); margin-bottom: 8px; font-size: 20px; }

/* ---------- admin ---------- */
#view-admin { height: 100vh; overflow-y: auto; }
.admin-head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 24px; border-bottom: 1px solid var(--border);
  background: var(--bg-2); position: sticky; top: 0; z-index: 5;
}
.admin-head h1 { font-size: 18px; }
.admin-body { max-width: 1000px; margin: 0 auto; padding: 24px; }
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat-card .num { font-size: 26px; font-weight: 700; color: var(--accent); }
.stat-card .lbl { font-size: 12.5px; color: var(--text-2); margin-top: 4px; }
.admin-tabs { display: flex; gap: 8px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.admin-tab { background: none; border: none; color: var(--text-2); padding: 10px 16px; cursor: pointer; font-size: 14px; border-bottom: 2px solid transparent; }
.admin-tab.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.table-wrap { overflow-x: auto; background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius); }
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th { text-align: left; padding: 10px 14px; color: var(--text-2); font-weight: 600; border-bottom: 1px solid var(--border); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.table tr:last-child td { border-bottom: none; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge.admin { background: #3b2f0b; color: var(--accent-2); }
.badge.user { background: var(--bg-3); color: var(--text-2); }
.badge.active { background: #0d2b16; color: var(--ok); }
.badge.blocked { background: #2b0d0d; color: var(--danger); }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }

.settings-grid { display: flex; flex-direction: column; gap: 18px; background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.setting-row { display: flex; flex-direction: column; gap: 8px; font-size: 13.5px; color: var(--text-2); }
.setting-row input, .setting-row select, .setting-row textarea { max-width: 480px; }
.checkbox-row { flex-direction: row; align-items: center; gap: 10px; color: var(--text); }
.checkbox-row input { width: 16px; height: 16px; }
.setting-label { font-size: 13.5px; color: var(--text-2); margin-bottom: 4px; }
.model-checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 8px; }
.model-check { display: flex; align-items: center; gap: 8px; background: var(--bg-3); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; font-size: 13px; color: var(--text); }
.model-check .grp { color: var(--text-2); font-size: 11px; margin-left: auto; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  #sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; z-index: 20;
    transform: translateX(-100%); transition: transform .2s;
  }
  #sidebar.open { transform: translateX(0); box-shadow: 0 0 60px rgba(0,0,0,.6); }
  #btn-menu { display: inline-flex; }
  .msg-row { padding: 6px 12px; }
  #composer-wrap { padding: 10px 12px 8px; }
  .model-select { max-width: 150px; }
}