/* AI0 Desktop Theme v0.2
   Layout zones (CSS grid):
     +-----------------------------------------------------+
     | #topbar                                             |
     +---------+---------------------------+---------------+
     | #sidebar| #chat-area (#chat-messages)| #utility-panel|
     |         | #composer                  |              |
     +---------+---------------------------+---------------+
*/

:root {
  --bg-0: #0a0e14;
  --bg-1: #11161e;
  --bg-2: #161c26;
  --bg-3: #1d2633;
  --border: #1d2633;
  --border-soft: #15202c;
  --fg-0: #d8e0ec;
  --fg-1: #8a96a8;
  --fg-2: #5d6b7e;
  --accent: #5cc8ff;
  --accent-strong: #7dd3fc;
  --accent-soft: #1e3a52;
  --ok: #4ade80;
  --warn: #facc15;
  --bad: #ef4444;
  --bubble-user: #1e3a52;
  --bubble-assistant: #161c26;
  --bubble-system: #1c1410;
  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; background: var(--bg-0); color: var(--fg-0); font-family: var(--sans); font-size: 14px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
button, input, textarea { font: inherit; color: inherit; }
::selection { background: var(--accent-soft); color: var(--fg-0); }

#app {
  display: grid;
  grid-template-columns: 280px 1fr 320px;
  grid-template-rows: 44px 1fr;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background: var(--bg-0);
}

/* topbar */
#topbar {
  grid-column: 1 / span 3; grid-row: 1;
  display: flex; align-items: center; gap: 14px;
  padding: 0 14px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  user-select: none;
}
#topbar .brand { display: flex; align-items: center; gap: 8px; font-weight: 600; letter-spacing: .2px; }
#topbar .brand .logo {
  width: 28px; height: 28px; border-radius: 7px; object-fit: cover; flex-shrink: 0;
  box-shadow: 0 0 14px rgba(92, 200, 255, 0.22);
}
#topbar .brand .name { font-size: 13px; }
#topbar .conv-title { flex: 1; min-width: 0; color: var(--fg-1); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#topbar .actions { display: flex; align-items: center; gap: 6px; }
#topbar a, #topbar button { all: unset; cursor: pointer; padding: 4px 10px; border-radius: 4px; font-size: 11px; color: var(--fg-1); border: 1px solid transparent; }
#topbar a:hover, #topbar button:hover { color: var(--accent); border-color: var(--border); background: var(--bg-2); }

#status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 999px;
  font-family: var(--mono); font-size: 11px; color: var(--fg-1);
}
#status-pill .pip { width: 7px; height: 7px; border-radius: 50%; background: var(--fg-2); }
#status-pill[data-state="ok"]   .pip { background: var(--ok);   box-shadow: 0 0 5px var(--ok); }
#status-pill[data-state="warn"] .pip { background: var(--warn); box-shadow: 0 0 5px var(--warn); }
#status-pill[data-state="bad"]  .pip { background: var(--bad);  box-shadow: 0 0 5px var(--bad); }

/* sidebar */
#sidebar {
  grid-column: 1; grid-row: 2;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; min-height: 0;
}
.sidebar-head { padding: 12px 12px 8px; display: flex; flex-direction: column; gap: 8px; border-bottom: 1px solid var(--border-soft); }
#conv-new { all: unset; cursor: pointer; padding: 9px 12px; border-radius: 5px; text-align: center; background: var(--accent-soft); color: var(--accent-strong); border: 1px solid rgba(92,200,255,.3); font-weight: 600; font-size: 12px; letter-spacing: .2px; }
#conv-new:hover { background: #224862; }
#conv-search { background: var(--bg-2); border: 1px solid var(--border); border-radius: 5px; padding: 7px 10px; font-size: 12px; outline: none; }
#conv-search:focus { border-color: var(--accent); }
.sidebar-section-label { padding: 12px 14px 4px; font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: var(--fg-2); }
#conv-list { flex: 1; overflow: auto; padding: 0 6px 12px; display: flex; flex-direction: column; gap: 2px; }
#conv-list .conv { display: flex; flex-direction: column; gap: 2px; padding: 8px 10px; border-radius: 5px; cursor: pointer; border: 1px solid transparent; }
#conv-list .conv:hover { background: var(--bg-2); }
#conv-list .conv[data-active="true"] { background: var(--bg-2); border-color: var(--border); }
#conv-list .conv .title { font-size: 12px; color: var(--fg-0); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#conv-list .conv .meta { font-size: 10px; color: var(--fg-2); display: flex; justify-content: space-between; gap: 6px; font-family: var(--mono); }
#conv-list .conv .del { all: unset; cursor: pointer; font-size: 10px; color: var(--fg-2); padding: 1px 5px; border-radius: 3px; }
#conv-list .conv .del:hover { color: var(--bad); background: var(--bg-3); }
#conv-list .empty { padding: 24px 16px; color: var(--fg-2); font-size: 11px; text-align: center; }

/* chat area */
#chat-area { grid-column: 2; grid-row: 2; display: grid; grid-template-rows: 1fr auto; min-height: 0; background: var(--bg-0); }
#chat-messages { overflow: auto; padding: 24px 16% 16px; display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 1300px) { #chat-messages { padding: 24px 8% 16px; } }
@media (max-width: 1100px) { #chat-messages { padding: 24px 4% 16px; } }

.empty-state { margin: auto; display: flex; flex-direction: column; align-items: center; gap: 14px; color: var(--fg-1); max-width: 540px; text-align: center; padding: 40px 24px; }
.empty-state h1 { margin: 0; font-size: 22px; font-weight: 600; color: var(--fg-0); letter-spacing: .2px; }
.empty-state p { margin: 0; font-size: 13px; color: var(--fg-1); }
.empty-state .hint { font-family: var(--mono); font-size: 11px; color: var(--fg-2); padding: 6px 10px; border: 1px solid var(--border); border-radius: 4px; background: var(--bg-1); }

.msg { display: flex; flex-direction: column; gap: 4px; max-width: 100%; }
.msg .bubble { max-width: 78%; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border-soft); white-space: pre-wrap; word-wrap: break-word; line-height: 1.55; }
.msg.user { align-items: flex-end; }
.msg.user .bubble { background: var(--bubble-user); border-color: rgba(92,200,255,.25); color: var(--fg-0); }
.msg.assistant { align-items: flex-start; }
.msg.assistant .bubble { background: var(--bubble-assistant); color: var(--fg-0); }
.msg.system { align-items: center; }
.msg.system .bubble { background: var(--bubble-system); border-color: rgba(239,68,68,.35); color: #fbcaca; font-family: var(--mono); font-size: 12px; max-width: 92%; }
.msg.system .bubble .err-code { color: var(--bad); font-weight: 600; margin-right: 6px; }
.msg.pending .bubble { color: var(--fg-1); font-style: italic; }
.msg.pending .bubble::after { content: "▍"; margin-left: 2px; animation: blink 1s step-end infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }

.intent-draft-panel {
  max-width: 78%;
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid rgba(92, 200, 255, 0.28);
  background: var(--bg-2);
  font-size: 12px;
  line-height: 1.45;
  color: var(--fg-1);
}
.intent-draft-panel h4 {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-strong);
}
.intent-draft-panel .intent-row { margin: 4px 0; padding-left: 2px; }
.intent-draft-panel .intent-row strong { color: var(--fg-0); font-weight: 600; }
.intent-draft-panel .intent-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.intent-draft-panel .intent-actions button {
  all: unset;
  cursor: pointer;
  font-size: 11px;
  padding: 5px 12px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--fg-0);
}
.intent-draft-panel .intent-actions button:hover { border-color: var(--accent); color: var(--accent-strong); }
.intent-draft-panel .intent-actions button.primary { background: var(--accent-soft); border-color: rgba(92,200,255,.4); }
.intent-draft-panel .intent-correct { margin-top: 8px; display: flex; flex-direction: column; gap: 6px; }
.intent-draft-panel .intent-correct label { font-size: 10px; color: var(--fg-2); }
.intent-draft-panel .intent-correct input {
  width: 100%;
  box-sizing: border-box;
  padding: 7px 9px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--bg-0);
  color: var(--fg-0);
  font-size: 12px;
}
.intent-draft-panel .intent-correct input:focus { outline: none; border-color: var(--accent); }
.intent-draft-panel .intent-note { font-size: 10px; color: var(--fg-2); margin-top: 6px; font-style: italic; }

.msg-toolbar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  max-width: 78%;
  margin-top: 2px;
}
.msg.user .msg-toolbar { align-self: flex-end; flex-direction: row-reverse; }
.msg.assistant .msg-toolbar { align-self: flex-start; }
.msg.system .msg-toolbar { align-self: center; max-width: 92%; justify-content: center; }
.msg-toolbar .meta { font-size: 10px; color: var(--fg-2); font-family: var(--mono); padding: 0 2px; }
.msg.user .msg-toolbar .meta { text-align: right; }
.msg-toolbar-actions { display: inline-flex; align-items: center; gap: 4px; }
.msg-toolbar-actions .msg-icon-btn {
  all: unset;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 5px;
  color: var(--fg-1);
  border: 1px solid var(--border);
  background: var(--bg-2);
}
.msg-toolbar-actions .msg-icon-btn:hover { color: var(--accent-strong); border-color: var(--accent); background: var(--bg-3); }
.msg-toolbar-actions .msg-text-btn {
  all: unset;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 4px;
}
.msg-toolbar-actions .msg-text-btn:hover { border-color: var(--accent); color: var(--accent-strong); }

#topbar-ai0-meta {
  flex: 1;
  min-width: 0;
  font-size: 10px;
  font-family: var(--mono);
  color: var(--fg-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 8px;
}
.composer-longwarn {
  margin-top: 4px;
  min-height: 14px;
  font-size: 10px;
  font-family: var(--mono);
  color: var(--warn);
}

.thinking-wrap {
  margin-top: 6px; max-width: 78%; font-family: var(--mono); font-size: 11px; color: var(--fg-1);
  border: 1px solid var(--border-soft); border-radius: 6px; background: var(--bg-2); padding: 0 10px 8px;
}
.thinking-wrap > summary {
  cursor: pointer; padding: 8px 0 6px; font-weight: 600; color: var(--accent); list-style: none;
}
.thinking-wrap > summary::-webkit-details-marker { display: none; }
.thinking-steps { margin: 0; padding: 0 0 0 18px; display: flex; flex-direction: column; gap: 4px; color: var(--fg-2); }
.thinking-steps li { line-height: 1.35; }
.thinking-steps li.ok::marker { color: var(--ok); }
.thinking-steps li.fail::marker { color: var(--bad); }

#composer { border-top: 1px solid var(--border); background: var(--bg-1); padding: 12px 16% 14px; }
@media (max-width: 1300px) { #composer { padding: 12px 8% 14px; } }
@media (max-width: 1100px) { #composer { padding: 12px 4% 14px; } }
#composer-form { display: grid; grid-template-columns: auto 1fr auto auto; gap: 8px; align-items: end; }
#composer-input { resize: none; min-height: 44px; max-height: 200px; padding: 11px 14px; background: var(--bg-2); border: 1px solid var(--border); border-radius: 6px; outline: none; color: var(--fg-0); font-size: 14px; line-height: 1.45; }
#composer-input:focus { border-color: var(--accent); }
#composer-input::placeholder { color: var(--fg-2); }
#composer-send { all: unset; cursor: pointer; padding: 0 18px; height: 44px; border-radius: 6px; background: var(--accent-soft); color: var(--accent-strong); border: 1px solid rgba(92,200,255,.3); font-weight: 600; font-size: 12px; letter-spacing: .3px; }
#composer-send:hover { background: #224862; }
#composer-send[disabled] { opacity: .5; cursor: not-allowed; }
#composer-cancel { all: unset; cursor: pointer; padding: 0 14px; height: 44px; border-radius: 6px; background: var(--bg-2); color: var(--fg-1); border: 1px solid var(--border); font-weight: 600; font-size: 12px; display: none; align-items: center; }
#composer-cancel:hover { color: var(--accent); border-color: var(--accent); }
#composer-cancel[disabled] { opacity: .45; cursor: not-allowed; }
#composer-mic {
  all: unset; box-sizing: border-box; cursor: pointer; width: 44px; height: 44px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center; border-radius: 50%;
  border: 1px solid var(--border); background: var(--bg-2); color: var(--fg-1);
}
#composer-mic:hover { color: var(--accent); border-color: rgba(92,200,255,.45); }
#composer-mic[disabled] { opacity: .4; cursor: not-allowed; }
#composer-mic.recording {
  border-color: rgba(248,113,113,.65); color: #f87171; background: rgba(239,68,68,.12);
  animation: micpulse 1.1s ease-in-out infinite;
}
@keyframes micpulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }
#composer-mic svg { width: 20px; height: 20px; display: block; }
.composer-mic-hint {
  margin-top: 4px; min-height: 14px; font-size: 11px; font-family: var(--mono); color: var(--fg-2);
}
.composer-mic-hint[data-state="bad"] { color: var(--bad); }
.composer-foot { margin-top: 6px; font-size: 10px; color: var(--fg-2); font-family: var(--mono); display: flex; justify-content: space-between; gap: 8px; }

/* utility panel */
#utility-panel { grid-column: 3; grid-row: 2; background: var(--bg-1); border-left: 1px solid var(--border); overflow: auto; display: flex; flex-direction: column; gap: 0; }
.util-section { padding: 12px 14px; border-bottom: 1px solid var(--border-soft); }
.util-section h3 { margin: 0 0 8px; font-size: 10px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--fg-2); font-weight: 600; }
.kv-row { display: flex; justify-content: space-between; gap: 8px; font-family: var(--mono); font-size: 11px; padding: 2px 0; }
.kv-row .k { color: var(--fg-1); }
.kv-row .v { color: var(--fg-0); }
.kv-row .v[data-state="ok"]   { color: var(--ok); }
.kv-row .v[data-state="warn"] { color: var(--warn); }
.kv-row .v[data-state="bad"]  { color: var(--bad); }
.kv-row .v[data-state="muted"] { color: var(--fg-2); }
.brain-state-chip { display: inline-block; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); font-family: var(--mono); font-size: 11px; color: var(--fg-1); }
.brain-state-chip[data-state="idle"]       { color: var(--fg-1); }
.brain-state-chip[data-state="observing"]  { color: var(--accent); border-color: rgba(92,200,255,.4); }
.brain-state-chip[data-state="planning"]   { color: var(--accent); border-color: rgba(92,200,255,.4); }
.brain-state-chip[data-state="acting"]     { color: var(--warn); border-color: rgba(250,204,21,.4); }
.brain-state-chip[data-state="verifying"]  { color: var(--warn); border-color: rgba(250,204,21,.4); }
.brain-state-chip[data-state="responding"] { color: var(--ok); border-color: rgba(74,222,128,.4); }
.brain-state-chip[data-state="failed"]     { color: var(--bad); border-color: rgba(239,68,68,.4); }
#util-tools-list { display: flex; flex-direction: column; gap: 3px; max-height: 160px; overflow: auto; }
#util-tools-list .tool { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 11px; padding: 2px 0; }
#util-tools-list .tool .risk { font-size: 10px; padding: 1px 6px; border-radius: 999px; border: 1px solid var(--border); color: var(--fg-2); }
#util-tools-list .tool .risk[data-r="low"]    { color: var(--ok); }
#util-tools-list .tool .risk[data-r="medium"] { color: var(--warn); }
#util-tools-list .tool .risk[data-r="high"]   { color: var(--bad); }
.util-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.util-actions button { all: unset; cursor: pointer; padding: 4px 9px; border-radius: 4px; font-family: var(--mono); font-size: 11px; color: var(--fg-1); border: 1px solid var(--border); background: var(--bg-2); }
.util-actions button:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 1100px) { #app { grid-template-columns: 240px 1fr 0; } #utility-panel { display: none; } }
@media (max-width: 720px)  { #app { grid-template-columns: 0 1fr 0; } #sidebar { display: none; } }

*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 6px; }
*::-webkit-scrollbar-thumb:hover { background: #2a3647; }