/* light is the default; dark via the OS setting (theme=system) or an explicit choice */
:root {
  --bg: #f7f7f8; --panel: #ffffff; --text: #16181d; --muted: #5d6470; --line: #e3e5ea;
  --accent: #2f6df6; --accent-soft: #e8efff; --ok: #1a8f4c; --ok-soft: #e4f5ea; --warn: #b26a00; --warn-soft: #fff3de;
  --danger: #c2352b; --danger-soft: #fde8e6; --code: #f0f1f4; --shadow: 0 10px 30px rgba(20, 24, 33, .12);
  --radius: 10px; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317; --panel: #1a1d23; --text: #e8eaee; --muted: #9aa1ad; --line: #2b2f37;
    --accent: #5b8cff; --accent-soft: #1e2a45; --ok: #4cc27f; --ok-soft: #173123; --warn: #f0a93b; --warn-soft: #3a2c14;
    --danger: #ff6b5f; --danger-soft: #3d1a17; --code: #22262e; --shadow: 0 10px 30px rgba(0, 0, 0, .45); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111317; --panel: #1a1d23; --text: #e8eaee; --muted: #9aa1ad; --line: #2b2f37;
  --accent: #5b8cff; --accent-soft: #1e2a45; --ok: #4cc27f; --ok-soft: #173123; --warn: #f0a93b; --warn-soft: #3a2c14;
  --danger: #ff6b5f; --danger-soft: #3d1a17; --code: #22262e; --shadow: 0 10px 30px rgba(0, 0, 0, .45); color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; display: flex; flex-direction: column; }
button, input, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }
.hidden { display: none !important; }
.spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

/* header */
.top { height: 56px; display: flex; align-items: center; gap: 12px; padding: 0 16px; background: var(--panel); border-bottom: 1px solid var(--line); position: relative; z-index: 30; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 16px; }
.meter { display: flex; align-items: baseline; gap: 6px; background: var(--accent-soft); border: 0; border-radius: 999px; padding: 6px 14px; cursor: pointer; }
.meter-num { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--accent); font-size: 15px; }
.meter-lbl { color: var(--muted); font-size: 12px; }
.meter-sep { width: 1px; height: 14px; background: var(--line); margin: 0 4px; align-self: center; }
.meter.bump .meter-num { animation: bump .5s ease; }
@keyframes bump { 40% { transform: scale(1.25); } }
.icon-btn { background: none; border: 0; padding: 6px; border-radius: 8px; cursor: pointer; color: var(--muted); font-size: 22px; line-height: 1; }
.icon-btn:hover { background: var(--code); color: var(--text); }
.update { background: var(--ok); color: #fff; border: 0; border-radius: 999px; padding: 6px 14px; font-weight: 600; cursor: pointer; }
.update-pop, .quota-pop { position: fixed; top: 60px; z-index: 40; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px; width: min(380px, calc(100vw - 32px)); }
.update-pop { right: 16px; }
.quota-pop { left: 110px; }
.quota-pop table { width: 100%; border-collapse: collapse; }
.quota-pop td { padding: 4px 0; }
.quota-pop td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.notes { white-space: pre-wrap; max-height: 200px; overflow: auto; font-size: 13px; background: var(--code); padding: 8px; border-radius: 8px; }

/* buttons & inputs */
.btn { border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 8px 14px; cursor: pointer; font-weight: 500; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.ghost { background: none; border-color: transparent; color: var(--muted); }
.btn.danger { color: var(--danger); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.wide { width: 100%; }
.btn:disabled { opacity: .5; cursor: default; }
input[type=text], input[type=password], input[type=number], textarea { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label { display: block; font-size: 12px; color: var(--muted); margin: 8px 0 4px; }

/* layout */
.layout { flex: 1; display: flex; min-height: 0; }
.side { width: 240px; border-right: 1px solid var(--line); padding: 12px; overflow: auto; background: var(--panel); }
.sessions { list-style: none; margin: 12px 0 0; padding: 0; }
.sessions li { display: flex; align-items: center; border-radius: 8px; }
.sessions li button.s { flex: 1; text-align: left; background: none; border: 0; padding: 8px 10px; cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border-radius: 8px; }
.sessions li.active button.s { background: var(--accent-soft); }
.sessions li .x { visibility: hidden; }
.sessions li:hover .x { visibility: visible; }
.chat { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.messages { flex: 1; overflow: auto; padding: 24px max(16px, calc((100% - 780px) / 2)); }
.composer { display: flex; gap: 8px; padding: 12px max(16px, calc((100% - 780px) / 2)) 16px; border-top: 1px solid var(--line); background: var(--panel); align-items: flex-end; }
.composer textarea { resize: none; max-height: 200px; }

/* messages */
.msg { margin: 0 0 16px; }
.msg.user { display: flex; justify-content: flex-end; }
.msg.user .bubble { background: var(--accent); color: #fff; border-radius: 14px 14px 4px 14px; padding: 8px 14px; max-width: 80%; white-space: pre-wrap; word-break: break-word; }
.msg.assistant .body { word-break: break-word; }
.msg.assistant .body p { margin: 0 0 8px; }
.msg.assistant .body pre { background: var(--code); padding: 10px; border-radius: 8px; overflow: auto; }
.msg.assistant .body code { background: var(--code); padding: 1px 4px; border-radius: 4px; font-size: 13px; }
.msg.assistant .body pre code { background: none; padding: 0; }
.msg .meta { font-size: 11px; color: var(--muted); margin-top: 4px; }
.msg.error .body { color: var(--danger); }
.tool { border: 1px solid var(--line); border-radius: 8px; margin: 6px 0; background: var(--panel); font-size: 13px; }
.tool summary { padding: 6px 10px; cursor: pointer; display: flex; gap: 8px; align-items: center; }
.tool pre { margin: 0; padding: 8px 10px; border-top: 1px solid var(--line); max-height: 260px; overflow: auto; white-space: pre-wrap; font-size: 12px; }
.tool .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex: none; }
.tool.done .dot { background: var(--ok); }
.tool.denied .dot { background: var(--danger); }
.tool.wait .dot { background: var(--warn); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .3; } }
.ask { display: flex; gap: 8px; align-items: center; padding: 8px 10px; border-top: 1px solid var(--line); background: var(--warn-soft); flex-wrap: wrap; }
.ask.danger { background: var(--danger-soft); }
.ask .why { flex: 1; min-width: 160px; }
.typing::after { content: "▍"; animation: pulse 1s infinite; }
.empty { text-align: center; color: var(--muted); margin-top: 12vh; }
.empty h2 { color: var(--text); margin-bottom: 4px; }
.suggest { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.approvals-banner { padding: 8px 16px; background: var(--warn-soft); border-bottom: 1px solid var(--line); }
.approvals-banner .row { display: flex; gap: 8px; align-items: center; margin: 4px 0; flex-wrap: wrap; }
.approvals-banner .row span { flex: 1; min-width: 200px; }

/* overlays */
.overlay { position: fixed; inset: 56px 0 0 0; background: rgba(10, 12, 16, .45); z-index: 20; display: flex; align-items: flex-start; justify-content: center; padding: 24px 16px; overflow: auto; }
.panel { background: var(--panel); border-radius: 14px; box-shadow: var(--shadow); width: min(720px, 100%); padding: 24px; }
.panel.wide { width: min(860px, 100%); }
.steps { display: flex; gap: 6px; list-style: none; padding: 0; margin: 0 0 20px; }
.steps li { flex: 1; height: 4px; border-radius: 2px; background: var(--line); }
.steps li.on { background: var(--accent); }
.step-body h1 { font-size: 24px; margin: 0 0 8px; }
.step-body h2 { font-size: 18px; margin: 20px 0 8px; }
.lead { font-size: 16px; color: var(--muted); margin: 0 0 16px; }
.step-nav { display: flex; gap: 8px; margin-top: 24px; align-items: center; }
.big-meter { display: flex; gap: 24px; align-items: baseline; background: var(--accent-soft); border-radius: var(--radius); padding: 16px 20px; margin: 12px 0 16px; flex-wrap: wrap; }
.big-meter b { font-size: 34px; color: var(--accent); font-variant-numeric: tabular-nums; }
.big-meter span { color: var(--muted); }

/* provider rows */
.prov { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; margin: 8px 0; }
.prov.connected { border-color: var(--ok); background: var(--ok-soft); }
.prov-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.prov-head .name { font-weight: 600; }
.gain { font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.badge { font-size: 11px; border-radius: 999px; padding: 1px 8px; background: var(--code); color: var(--muted); }
.badge.yes { background: var(--ok-soft); color: var(--ok); }
.prov-form { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.prov-form input { flex: 1; min-width: 180px; }
.prov .msg-line { font-size: 13px; margin-top: 6px; }
.prov .msg-line.err { color: var(--danger); }
.prov .msg-line.ok { color: var(--ok); }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.chip { font-family: ui-monospace, Consolas, monospace; font-size: 12px; padding: 3px 8px; border-radius: 6px; background: var(--code); color: var(--muted); }
.chip.on { background: var(--ok-soft); color: var(--ok); }
.list-row { display: flex; gap: 8px; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--line); }
.list-row code { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.copy-row { display: flex; gap: 8px; align-items: center; margin: 4px 0; }
.copy-row code { flex: 1; background: var(--code); padding: 6px 8px; border-radius: 6px; overflow: auto; white-space: nowrap; }
pre.snippet { background: var(--code); padding: 10px; border-radius: 8px; overflow: auto; font-size: 12px; }
.note { background: var(--code); border-radius: 8px; padding: 10px 12px; font-size: 13px; color: var(--muted); margin: 12px 0; }
.tiers { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; font-size: 13px; }
.tiers .badge { white-space: nowrap; align-self: start; text-align: center; }
.settings-head { display: flex; align-items: center; margin-bottom: 12px; }
.tabs { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.tabs button { background: none; border: 0; padding: 8px 12px; border-radius: 8px; cursor: pointer; color: var(--muted); }
.tabs button.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.toggle { display: flex; gap: 10px; align-items: center; cursor: pointer; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 8px 16px; border-radius: 8px; z-index: 50; }

/* header memory pill */
.mem-pill { display: flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--panel); color: var(--muted); border-radius: 999px; padding: 5px 12px; cursor: pointer; font-size: 12px; }
.mem-pill:hover { color: var(--text); border-color: var(--muted); }

/* chat memory chips + status */
.mem-chip { display: inline-block; font-size: 12px; color: var(--muted); background: var(--code); border: 0; border-radius: 999px; padding: 3px 10px; margin: 2px 0 6px; cursor: pointer; }
.mem-chip.learned { background: var(--ok-soft); color: var(--ok); margin-top: 6px; }
.status-line { font-size: 12px; color: var(--muted); font-style: italic; margin: 4px 0; }
.summary-divider { text-align: center; font-size: 12px; color: var(--muted); margin: 12px 0; padding: 6px; border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line); }
.summary-divider summary { cursor: pointer; }
.summary-divider > div { text-align: left; margin-top: 8px; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.feature-grid > div { background: var(--code); border-radius: var(--radius); padding: 12px 14px; }
.feature-grid p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

/* settings: nav on the left, options on the right */
.settings-overlay { padding: 24px; align-items: stretch; }
.settings-shell { background: var(--panel); border-radius: 14px; box-shadow: var(--shadow); width: min(1080px, 100%); display: grid; grid-template-columns: 230px 1fr; overflow: hidden; max-height: calc(100vh - 56px - 48px); }
.snav-wrap { border-right: 1px solid var(--line); padding: 16px 10px; overflow: auto; background: var(--bg); }
.snav-title { font-weight: 700; font-size: 15px; padding: 4px 10px 12px; }
.snav { display: flex; flex-direction: column; gap: 2px; }
.nav-item { display: flex; align-items: center; gap: 10px; text-align: left; background: none; border: 0; border-radius: 8px; padding: 8px 10px; cursor: pointer; color: var(--muted); }
.nav-item:hover { background: var(--code); color: var(--text); }
.nav-item.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-ico { display: inline-flex; }
.spanel-wrap { position: relative; overflow: hidden; display: flex; }
.spanel { flex: 1; overflow: auto; padding: 20px 28px 40px; }
.settings-x { position: absolute; top: 10px; right: 12px; z-index: 2; }
.panel-title { font-size: 20px; margin: 4px 0 16px; }
.s-card { border: 1px solid var(--line); border-radius: 12px; padding: 4px 16px 12px; margin: 0 0 16px; }
.s-card > h3 { font-size: 14px; margin: 14px 0 6px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.s-card .row:last-child { border-bottom: 0; }
.row-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.row-label { font-weight: 500; }
.row-hint { font-size: 12px; color: var(--muted); }
p.row-hint { margin: 8px 0; }
.toggle-row { cursor: pointer; margin: 0; font-size: 14px; color: var(--text); }
.switch { appearance: none; -webkit-appearance: none; width: 36px; height: 20px; border-radius: 999px; background: var(--line); position: relative; cursor: pointer; flex: none; transition: background .15s; margin: 0; }
.switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: transform .15s; box-shadow: 0 1px 2px rgba(0,0,0,.3); }
.switch:checked { background: var(--accent); }
.switch:checked::after { transform: translateX(16px); }
.seg { display: inline-flex; background: var(--code); border-radius: 8px; padding: 2px; flex: none; }
.seg button { border: 0; background: none; padding: 5px 12px; border-radius: 6px; cursor: pointer; color: var(--muted); font-size: 13px; }
.seg button.on { background: var(--panel); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.15); font-weight: 600; }
.select { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; flex: none; color: var(--text); }
.textarea { width: 100%; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px; resize: vertical; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; }
.grow { flex: 1; min-width: 160px; }
.stats { display: flex; gap: 20px; padding: 10px 0; color: var(--muted); flex-wrap: wrap; }
.stats b { color: var(--text); font-size: 18px; }
.note-row { display: flex; gap: 8px; align-items: center; padding: 6px 0; border-bottom: 1px solid var(--line); }
.note-row input { padding: 6px 8px; }
.journal { border-bottom: 1px solid var(--line); padding: 8px 0; }
.journal summary { cursor: pointer; }
.journal p { margin: 6px 0; }
.rb-row { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--line); }
.rb-main { flex: 1; min-width: 0; }
.rb-actions { display: flex; gap: 6px; flex: none; flex-wrap: wrap; }
.editor { border: 1px solid var(--accent); border-radius: 10px; padding: 12px; margin: 8px 0 12px; }
.hit { padding: 8px 0; border-bottom: 1px solid var(--line); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.prov.disabled { opacity: .55; }
.prov-actions { display: flex; align-items: center; gap: 10px; }
ul.plain { margin: 6px 0; padding-left: 18px; }
ul.plain li { margin: 4px 0; }

@media (max-width: 760px) {
  .settings-overlay { padding: 0; }
  .settings-shell { grid-template-columns: 1fr; max-height: none; border-radius: 0; }
  .snav-wrap { border-right: 0; border-bottom: 1px solid var(--line); padding: 8px; }
  .snav { flex-direction: row; overflow-x: auto; }
  .nav-item { white-space: nowrap; }
  .snav-title { display: none; }
  .spanel { padding: 16px; }
  .row { flex-wrap: wrap; }
  .feature-grid { grid-template-columns: 1fr; }
  .mem-pill span { display: none; }
}
@media (max-width: 700px) {
  .side { display: none; }
  .grid2 { grid-template-columns: 1fr; }
  .meter-lbl { display: none; }
}

/* login / first-run screen (server mode) */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px; }
.login-panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); width: min(400px, 100%); padding: 28px; }
.login-panel .brand { font-size: 20px; margin-bottom: 4px; }
.login-sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
.login-field { margin: 0 0 14px; }
.login-field label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
.login-error { color: var(--danger); font-size: 13px; min-height: 18px; margin: 4px 0 10px; }
.login-panel .btn { width: 100%; }