:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1c2129;
  --border: #2b313b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #4493f8;
  --accent-dim: #4493f833;
  --green: #3fb950;
  --red: #f85149;
  --amber: #d29922;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { background: #0d1117; }
html, body { height: 100%; overflow: hidden; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 14px/1.5 -apple-system, "Segoe UI", Roboto, sans-serif;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.spacer { flex: 1; }
.error { color: var(--red); font-size: 12px; min-height: 16px; margin-top: 8px; }

/* login */
.overlay {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px; width: 320px;
}
.brand { font-weight: 600; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
  display: inline-block; box-shadow: 0 0 8px var(--accent); }
input[type="password"], textarea {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
  font: inherit; margin-top: 14px; outline: none;
}
input[type="password"]:focus, textarea:focus { border-color: var(--accent); }

button {
  font: inherit; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel2); color: var(--text); padding: 8px 14px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:disabled { opacity: .5; cursor: default; }
button.ghost { background: transparent; }

/* layout */
.app { display: flex; flex-direction: column;
  height: 100vh; height: 100dvh; overflow: hidden; }
header {
  display: flex; align-items: center; gap: 16px; flex-shrink: 0;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.main { flex: 1; display: flex; min-height: 0; }

/* toggles */
.toggles {
  display: flex; flex-wrap: wrap; gap: 18px; align-items: center; flex-shrink: 0;
  padding: 8px 16px; border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.tgroup { display: flex; align-items: center; gap: 8px; }
.tgroup > label { color: var(--muted); font-size: 12px; text-transform: uppercase;
  letter-spacing: .04em; }
.chips { display: flex; gap: 6px; }
.chip {
  padding: 5px 12px; border-radius: 999px; border: 1px solid var(--border);
  background: transparent; color: var(--muted); cursor: pointer; font-size: 13px;
}
.chip.active { background: var(--accent-dim); border-color: var(--accent);
  color: var(--text); }
.chip:disabled { opacity: .35; cursor: default; }

/* sidebar */
aside {
  width: 270px; min-width: 270px; border-right: 1px solid var(--border);
  background: var(--panel); overflow-y: auto; padding: 12px;
  flex-shrink: 0; align-self: stretch; position: sticky; top: 0; max-height: 100%;
}
.side-sec { margin-bottom: 18px; }
.side-title {
  color: var(--muted); font-size: 11px; text-transform: uppercase;
  letter-spacing: .05em; margin: 10px 4px 6px;
}
.proj {
  display: block; width: 100%; text-align: left; background: transparent;
  border: none; color: var(--text); padding: 7px 10px; border-radius: 8px;
}
.proj:hover { background: var(--panel2); }
.proj.active { background: var(--accent-dim); }
.proj .sub-label { color: var(--muted); font-size: 11px; display: block; }
.cat-label { color: var(--text); font-weight: 600; padding: 6px 4px 2px; }
.resume-row {
  padding: 6px 10px; border-radius: 8px; cursor: pointer; font-size: 13px;
}
.resume-row:hover { background: var(--panel2); }
.resume-row.active { background: var(--accent-dim); }
.resume-row .meta { color: var(--muted); font-size: 11px; }
.lock { color: var(--amber); }

/* chat */
#chatwrap { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; }
#chat { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.ctxbar {
  padding: 6px 16px; border-bottom: 1px solid var(--border);
  color: var(--muted); font-size: 12px; background: var(--panel); flex-shrink: 0;
}
#messages { flex: 1 1 auto; overflow-y: auto; padding: 18px; display: flex;
  flex-direction: column; gap: 14px; min-height: 0; }
#messages > .msg:first-child { margin-top: auto; }   /* anchor convo to the bottom */
.msg { max-width: 78%; border-radius: 12px; padding: 10px 14px; white-space: pre-wrap;
  word-wrap: break-word; }
.msg.user { align-self: flex-end; background: #1f3a5f; border: 1px solid #2b4d78; }
.msg.assistant { align-self: flex-start; background: var(--panel);
  border: 1px solid var(--border); white-space: normal; }
.msg .sig { display: block; margin-top: 8px; color: var(--muted); font-size: 11px; }
.msg.pending { align-self: flex-start; background: var(--panel);
  border: 1px dashed var(--border); color: var(--muted); }
.msg.pending .dots::after { content: ""; animation: dots 1.2s steps(4) infinite; }
@keyframes dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }
.msg pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px; overflow-x: auto; font-family: var(--mono); font-size: 12.5px;
  white-space: pre;
}
.msg code { font-family: var(--mono); background: var(--bg);
  border-radius: 4px; padding: 1px 5px; font-size: 12.5px; }

#composer {
  display: flex; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--border);
  background: var(--panel); align-items: flex-end; flex-shrink: 0;
}

/* activity indicator */
.activity { display: inline-flex; align-items: center; justify-content: center;
  width: 34px; flex-shrink: 0; }
.activity .ball { width: 13px; height: 13px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 8px var(--accent); animation: roll 0.9s linear infinite; }
.activity.done .ball { background: var(--green); box-shadow: 0 0 8px var(--green);
  animation: none; }
@keyframes roll {
  0% { transform: translateX(-9px) rotate(0deg); }
  50% { transform: translateX(9px) rotate(180deg); }
  100% { transform: translateX(-9px) rotate(360deg); }
}
#cancel-btn { color: var(--red); font-weight: 600; padding: 4px 10px; }

/* agent busy badge */
.agent-busy { display: inline-flex; align-items: center; gap: 7px;
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--panel2); font-size: 13px; }
.agent-busy .ball { width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
  animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: .45; } 50% { opacity: 1; } }
.agent-busy b { color: var(--text); font-weight: 600; }
#input { margin: 0; resize: none; min-height: 44px; max-height: 160px; }
#send { flex-shrink: 0; height: 40px; }

/* viewer (zcode) */
.viewer { flex: 1; overflow-y: auto; padding: 18px; }
.viewer-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 12px;
}
.viewer-card .t { font-weight: 600; }
.viewer-card .m { color: var(--muted); font-size: 12px; margin-top: 4px; }
.notice {
  border-color: var(--amber); background: #2d230d;
  padding: 12px 16px; border-radius: 10px; border: 1px solid var(--amber);
  margin-bottom: 16px; font-size: 13px;
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }

#menu-btn { display: none; font-size: 18px; padding: 6px 12px; }
#backdrop { display: none; }

/* collapsible toggles bar */
#tg-collapse { flex-shrink: 0; padding: 4px 10px; font-size: 12px; color: var(--muted); }
#toggles.closed .tgroup, #toggles.closed #combo-note { display: none; }
#toggles.closed { gap: 6px; padding: 5px 12px; }

/* ---------- mobile mode (Android phones, e.g. TCL NXT 20) ---------- */
@media (max-width: 760px) {
  #menu-btn { display: inline-block; }
  #vps-health { display: none; }

  header { padding: 8px 10px; gap: 8px; }
  .brand { font-size: 14px; }

  .toggles {
    gap: 6px 8px; padding: 6px 8px; flex-wrap: wrap; row-gap: 6px;
  }
  .tgroup { flex-shrink: 0; gap: 5px; }
  .tgroup > label { font-size: 10px; }
  .chips { flex-wrap: wrap; gap: 5px; }
  .chip { padding: 7px 10px; font-size: 12.5px; }   /* ~36px touch targets */
  #combo-note { flex-basis: 100%; font-size: 11px; }

  aside {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 40;
    width: 82vw; max-width: 320px; min-width: 0;
    transform: translateX(-105%); transition: transform .18s ease-out;
    box-shadow: 0 0 30px #000c;
  }
  .app.side-open aside { transform: translateX(0); }
  #backdrop {
    display: block; position: fixed; inset: 0; z-index: 39;
    background: #000a; opacity: 0; pointer-events: none;
    transition: opacity .18s ease-out;
  }
  .app.side-open #backdrop { opacity: 1; pointer-events: auto; }

  .msg { max-width: 92%; font-size: 14px; }
  #messages { padding: 12px; gap: 10px; }
  #composer { padding: 8px; gap: 6px; }
  #composer button { padding: 10px 12px; font-size: 16px; }
  #input { min-height: 40px; font-size: 16px; }   /* 16px stops iOS/Android zoom */
  #send { height: 44px; padding: 8px 16px; }
  .ctxbar { font-size: 11px; padding: 5px 10px; }
  .proj, .resume-row { padding: 11px 10px; font-size: 14px; }
  .viewer { padding: 12px; }
}