:root {
  --bg: #0f1115; --panel: #171a21; --line: #262b36; --text: #e6e8ee; --muted: #8b93a5;
  --accent: #3b82f6; --accent-2: #2563eb; --danger: #ef4444; --radius: 10px;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) { --bg: #f4f5f8; --panel: #fff; --line: #e3e6ec; --text: #14171d; --muted: #667085; }
}
/* explicit light mode */
:root[data-theme="light"] { --bg: #f4f5f8; --panel: #fff; --line: #e3e6ec; --text: #14171d; --muted: #667085; }
/* explicit dark mode */
:root[data-theme="dark"] { --bg: #0f1115; --panel: #171a21; --line: #262b36; --text: #e6e8ee; --muted: #8b93a5; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body { font: 14.5px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--text); display: flex; flex-direction: column; }

.top { display: flex; align-items: center; justify-content: space-between; padding: .6rem 1rem; border-bottom: 1px solid var(--line); background: var(--panel); }
.brand { font-weight: 700; font-size: 1.05rem; letter-spacing: .01em; }
.tag { font-size: .7rem; font-weight: 600; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: .05rem .45rem; margin-left: .35rem; vertical-align: middle; }
.top-actions { display: flex; gap: .5rem; }



.pane { min-height: 0; overflow: auto; }



.toolbar { display: flex; gap: .6rem; align-items: center; padding: .6rem .9rem; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.toolbar label { display: flex; align-items: center; gap: .4rem; font-size: .85rem; color: var(--muted); }
.spacer { flex: 1; }
#frame { flex: 1; border: 0; width: 100%; background: #fff; }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
.card h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 .7rem; }
.drop { border: 1.5px dashed var(--line); border-radius: var(--radius); padding: 1.2rem; text-align: center; transition: border-color .15s, background .15s; }
.drop.over { border-color: var(--accent); background: rgba(59,130,246,.06); }
.drop p { margin: .25rem 0; }
.muted { color: var(--muted); font-size: .85rem; }
.status { min-height: 1.2em; font-size: .85rem; color: var(--accent); margin: .5rem 0 0; }
.status.err { color: var(--danger); }
details { margin-top: .75rem; } summary { cursor: pointer; color: var(--muted); font-size: .9rem; }

textarea, input[type=text], input[type=password], input[type=url], input[type=email], select {
  width: 100%; font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 7px; padding: .5rem .6rem; margin: .35rem 0;
}
textarea { resize: vertical; }
button, .link { font: inherit; font-weight: 600; border-radius: 7px; padding: .5rem .85rem; cursor: pointer; border: 1px solid var(--line); background: var(--panel); color: var(--text); text-decoration: none; display: inline-block; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-2); }
button.ghost:hover, .link:hover { border-color: var(--accent); }
button.small { padding: .35rem .7rem; font-size: .85rem; }
button.danger { color: var(--danger); }
button.linkish { background: none; border: 0; padding: 0; color: var(--accent); font-weight: 600; cursor: pointer; }
button:disabled { opacity: .5; cursor: not-allowed; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; margin-top: .4rem; }
.row.end { justify-content: flex-end; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: .5rem; }
.chips button { font-size: .8rem; font-weight: 500; padding: .3rem .6rem; }

/* form editor */
.sec { border-top: 1px solid var(--line); padding: .8rem 0; }
.sec:first-child { border-top: 0; padding-top: 0; }
.sec-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .4rem; }
.sec-head h3 { margin: 0; font-size: .9rem; }
.item { border: 1px solid var(--line); border-radius: 8px; padding: .6rem .7rem; margin: .45rem 0; background: var(--bg); }
.item .row { justify-content: flex-end; margin-top: .2rem; }
.item label, .sec > label { display: block; font-size: .78rem; color: var(--muted); margin-top: .35rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 .6rem; }
@media (max-width: 520px) { .grid2 { grid-template-columns: 1fr; } }

dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); padding: 0; max-width: 32rem; width: calc(100% - 2rem); }
dialog::backdrop { background: rgba(0,0,0,.5); }
.dlg { padding: 1.2rem; }
.dlg h2 { margin: 0 0 .3rem; font-size: 1.05rem; }
.dlg label { display: block; font-size: .8rem; color: var(--muted); margin-top: .6rem; }
.dlg a { color: var(--accent); }

/* ───── landing ───── */
.landing { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; padding:2rem; }
.drop.big { width:min(42rem, 100%); padding:3.5rem 2rem; border-width:2px; }
.drop-inner .logo { font-size:1.6rem; font-weight:700; letter-spacing:.01em; margin-bottom:1rem; }
.lead { font-size:1.35rem; font-weight:600; margin:.25rem 0; }
.small { font-size:.78rem; }
.landing-actions { display:flex; gap:.6rem; justify-content:center; margin-top:1.4rem; }

/* ───── workspace ───── */
.workspace { flex:1; display:grid; grid-template-columns:1fr minmax(320px, 34%); min-height:0; }
@media (max-width: 960px) { .workspace { grid-template-columns:1fr; } .stage { min-height:70vh; } }
.side { display:flex; flex-direction:column; min-height:0; border-left:1px solid var(--line); background:var(--panel); }
.side-head { display:flex; align-items:center; gap:.8rem; padding:.55rem .9rem; border-bottom:1px solid var(--line); }
.tabs { display:flex; gap:.25rem; margin-left:auto; }
.tab { border:0; background:none; color:var(--muted); font-weight:600; padding:.35rem .6rem; border-radius:6px; }
.tab.active { color:var(--text); background:var(--bg); }
.icon { border:1px solid var(--line); background:var(--bg); width:2.1rem; height:2.1rem; padding:0; border-radius:8px; font-size:1rem; }
.icon.live { background:var(--danger); border-color:var(--danger); color:#fff; animation:pulse 1s infinite; }
@keyframes pulse { 50% { opacity:.6; } }
.tab-panel { display:none; flex:1; min-height:0; flex-direction:column; }
.tab-panel.active { display:flex; }
#tab-fields { overflow:auto; padding:1rem; }
.messages { flex:1; overflow:auto; padding:1rem; display:flex; flex-direction:column; gap:.6rem; }
.msg { max-width:92%; padding:.6rem .8rem; border-radius:12px; line-height:1.45; font-size:.92rem; white-space:normal; }
.msg.user { align-self:flex-end; background:var(--accent); color:#fff; border-bottom-right-radius:4px; }
.msg.assistant { align-self:flex-start; background:var(--bg); border:1px solid var(--line); border-bottom-left-radius:4px; }
.msg.error { align-self:flex-start; background:rgba(239,68,68,.1); border:1px solid var(--danger); color:var(--danger); }
.msg.thinking { color:var(--muted); font-style:italic; }
.side .chips { padding:0 1rem; }
.composer { padding:.7rem .9rem .6rem; border-top:1px solid var(--line); background:var(--panel); }
.box { position:relative; }
.box textarea { margin:0; padding-right:5.6rem; min-height:3.4rem; }
.icon.in-box { position:absolute; bottom:.45rem; width:2rem; height:2rem; }
#btn-mic.in-box { right:2.9rem; }
#btn-ask.in-box { right:.5rem; background:var(--accent); border-color:var(--accent); color:#fff; }
.toolbar .brand { margin-right:.4rem; }
.composer textarea { margin:0 0 .4rem; }
.composer-row { display:flex; align-items:center; gap:.5rem; }
.stage { display:flex; flex-direction:column; min-height:0; background:#3a3f4b; }
@media (prefers-color-scheme: light) { .stage { background:#d9dce3; } }
.composer .status { margin:0; min-height:0; }

select.mini { width:auto; margin:0; padding:.35rem .5rem; font-size:.8rem; max-width:11rem; }

.ok { color:#15803d; }

.repeat { opacity:.65; font-size:.8em; font-weight:600; }

/* session manager */
.sessions-dlg { min-width: 480px; }
@media (max-width: 520px) { .sessions-dlg { min-width: auto; } }
.sessions-toolbar { display: flex; gap: .5rem; margin: .8rem 0; flex-wrap: wrap; }
.sessions-list { border: 1px solid var(--line); border-radius: 8px; max-height: 50vh; overflow: auto; margin-bottom: 1rem; }
.session-item { display: flex; align-items: center; gap: .6rem; padding: .6rem .8rem; border-bottom: 1px solid var(--line); }
.session-item:last-child { border-bottom: 0; }
.session-item input[type=checkbox] { width: 18px; height: 18px; cursor: pointer; }
.session-item.active { background: rgba(59,130,246,.08); }
.session-item-info { flex: 1; min-width: 0; }
.session-item-name { font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.session-item-meta { font-size: .75rem; color: var(--muted); margin-top: .2rem; }
.session-item-notes { font-size: .8rem; color: var(--muted); margin-top: .2rem; max-height: 2.8em; overflow: hidden; }
.session-item-empty { padding: 2rem 1rem; text-align: center; color: var(--muted); }