:root {
  color-scheme: light dark;
  --bg: #f4f6f5; --panel: #ffffff; --text: #17251e; --muted: #5e6e66; --line: #dbe3df;
  --accent: #2e7350; --accent-ink: #ffffff; --accent-soft: #e2f0e7; --warn: #b07f1c; --warn-soft: #fbf1d9;
  --error: #b42318; --error-soft: #fdecea; --code: #0f1a15;
  --font: "Segoe UI", Tahoma, "Noto Sans Arabic", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1613; --panel: #17201c; --text: #e6eee9; --muted: #9aaba2; --line: #2a3832;
    --accent: #62ac83; --accent-ink: #0f1613; --accent-soft: #1d3329; --warn: #edbe45; --warn-soft: #33290f;
    --error: #ff8a80; --error-soft: #3a1714; --code: #0a0f0d;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.7 var(--font); }
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
h1 { font-size: 1.5rem; margin: 0 0 4px; }
h2 { font-size: 1.05rem; margin: 24px 0 8px; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--error); min-height: 1.2em; margin: 0; }

.btn { border: 1px solid var(--line); background: var(--panel); border-radius: 10px; padding: 7px 14px; cursor: pointer; text-decoration: none; color: var(--text); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.btn:hover { border-color: var(--accent); }
.btn.primary, a.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.icon { padding: 6px 10px; }
.badge { font-size: .75rem; border-radius: 99px; padding: 2px 10px; }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; }
input, select, textarea { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
input:focus, select:focus, textarea:focus, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* login */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(380px, 100%); padding: 28px; display: grid; gap: 12px; }
.login-card label { display: grid; gap: 4px; font-weight: 600; }

/* layout */
.app { height: 100%; display: grid; grid-template-columns: 290px 1fr; grid-template-rows: auto 1fr; }
.topbar { grid-column: 1 / -1; display: flex; align-items: center; gap: 14px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.brand { font-size: 1.05rem; }
.spend { display: grid; gap: 2px; font-size: .8rem; color: var(--muted); min-width: 150px; }
.spend .bar { height: 6px; background: var(--accent-soft); border-radius: 9px; overflow: hidden; }
.spend .bar span { display: block; height: 100%; width: 0; background: var(--accent); }
.spend.high .bar span { background: var(--warn); }
.tabs { display: flex; gap: 4px; margin-right: auto; }
.tab { border: 0; background: transparent; padding: 6px 12px; border-radius: 8px; cursor: pointer; color: var(--muted); }
.tab.active { background: var(--accent-soft); color: var(--text); font-weight: 600; }

.sidebar { background: var(--panel); border-left: 1px solid var(--line); padding: 14px; overflow-y: auto; display: grid; align-content: start; gap: 10px; }
.check { display: flex; gap: 6px; align-items: center; font-size: .9rem; }
.session-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.session-list button { width: 100%; text-align: right; border: 0; background: transparent; border-radius: 10px; padding: 8px 10px; cursor: pointer; display: grid; gap: 2px; }
.session-list button:hover { background: var(--bg); }
.session-list button.active { background: var(--accent-soft); }
.session-list .t { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-list .m { font-size: .78rem; color: var(--muted); }

.main { min-width: 0; overflow: hidden; display: grid; grid-template-rows: auto 1fr auto; min-height: 0; }
.session-head { display: flex; gap: 10px; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.title-input { flex: 1 1 200px; font-weight: 600; border-color: transparent; background: transparent; }
.title-input:hover { border-color: var(--line); }
.messages { min-width: 0; grid-template-columns: minmax(0, 1fr); overflow-y: auto; padding: 16px; display: grid; align-content: start; gap: 14px; }
.empty { text-align: center; color: var(--muted); padding: 48px 16px; }

.msg { min-width: 0; max-width: 860px; width: 100%; overflow-wrap: anywhere; border-radius: 14px; padding: 12px 16px; }
.msg.user { background: var(--accent-soft); justify-self: start; max-width: 720px; white-space: pre-wrap; }
.msg.assistant { background: var(--panel); border: 1px solid var(--line); }
.msg .body p { margin: 0 0 8px; }
.msg .body pre { background: var(--code); color: #e6eee9; padding: 10px; border-radius: 8px; overflow-x: auto; direction: ltr; text-align: left; font-size: .85rem; }
.msg .body code { direction: ltr; unicode-bidi: isolate; font-family: Consolas, monospace; font-size: .88em; }
.steps { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.step { font-size: .78rem; border-radius: 99px; padding: 2px 10px; background: var(--bg); border: 1px solid var(--line); }
.step.ok { border-color: var(--accent); }
.step.error { border-color: var(--warn); color: var(--warn); }
.step.run::after { content: " …"; }
.notice { color: var(--warn); font-size: .9rem; }
.msg .error-box { background: var(--error-soft); color: var(--error); border-radius: 8px; padding: 8px 12px; margin-top: 8px; }

.artifact { border: 1px solid var(--accent); border-radius: 12px; padding: 10px 12px; margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.artifact .info { flex: 1 1 200px; }
.artifact .info strong { display: block; }

.tokens { margin-top: 10px; font-size: .8rem; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 6px; }
.tokens { overflow-x: auto; }
.tokens summary { cursor: pointer; }
.tokens table { margin-top: 6px; }

.composer { border-top: 1px solid var(--line); padding: 12px 16px; background: var(--panel); display: grid; gap: 8px; }
.composer textarea { width: 100%; resize: vertical; min-height: 70px; max-height: 40vh; }
.composer-row { display: flex; gap: 8px; align-items: center; }
.composer-row .muted { margin-left: auto; }

/* usage */
.usage { display: block; overflow-y: auto; padding: 16px; }
.usage-filters { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.usage-filters label { display: grid; gap: 2px; font-size: .85rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-top: 16px; }
.cards .card { padding: 14px; }
.cards .v { font-size: 1.4rem; font-weight: 700; display: block; }
.grid-2 > * { min-width: 0; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
.table-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: .85rem; }
th, td { padding: 7px 10px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
th { color: var(--muted); font-weight: 600; background: var(--bg); }
td.num, th.num { text-align: left; direction: ltr; font-variant-numeric: tabular-nums; }
tr:last-child td { border-bottom: 0; }

.only-mobile { display: none; }
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .only-mobile { display: inline-flex; }
  .sidebar { position: fixed; inset: 0 0 0 auto; width: min(300px, 85vw); z-index: 10; transform: translateX(100%); transition: transform .2s; box-shadow: -8px 0 24px rgba(0,0,0,.2); }
  .sidebar.open { transform: none; }
  .grid-2 { grid-template-columns: 1fr; }
  .spend { min-width: 110px; }
  .topbar { gap: 8px 10px; padding: 8px 12px; }
  #who { display: none; }
  .messages { padding: 12px; }
  .artifact .info { flex-basis: 100%; }
  .composer-row .muted { display: none; }
}

.toast { position: fixed; inset-block-end: 16px; inset-inline: 16px; margin-inline: auto; max-width: 420px; z-index: 20;
  background: var(--text); color: var(--bg); border-radius: 12px; padding: 10px 16px; text-align: center; box-shadow: 0 8px 24px rgba(0,0,0,.25); }
@media (max-width: 860px) {
  .sidebar { top: 0; padding-top: 16px; }
  .sidebar.open::before { content: ""; position: fixed; inset: 0 min(300px, 85vw) 0 0; background: rgba(0,0,0,.35); }
}