:root {
  --blue: #2F5D8A; --blue-dark: #1F4468; --blue-soft: #E8EEF5;
  --gold: #E8B11C; --gold-soft: #FEF6DD; --gold-ink: #6B4E00;
  --ink: #1F2933; --ink-2: #46515E; --muted: #5B6673;
  --bg: #F4F6F9; --panel: #FFFFFF; --line: #E3E8EF; --line-2: #C9D2DE;
  --ok-bg: #ECFDF3; --ok: #05603A; --warn-bg: #FEF0C7; --warn: #7A2E0E; --err-bg: #FEE4E2; --err: #912018;
  --code-bg: #0F1720; --code-fg: #D6DEEB; --code-gutter: #6B7A8A;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 14px; }
body { min-height: 100vh; display: flex; flex-direction: column; }
h1 { font-size: 26px; margin: 0 0 6px; }
h2 { font-size: 16px; margin: 0; }
h3 { font-size: 13px; margin: 14px 0 8px; color: var(--ink-2); }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--blue); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.spacer, .grow { flex: 1 1 auto; }
.push { margin-left: auto; }
[hidden] { display: none !important; }

/* top bar */
.topbar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; padding: 10px 20px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.accent { color: var(--blue); }
.tabs { display: flex; flex-wrap: wrap; gap: 4px; }
.tab { min-height: 38px; padding: 0 14px; border: none; border-radius: 8px; background: transparent; color: var(--ink-2); font-weight: 500; cursor: pointer; }
.tab:hover { background: var(--bg); }
.tab[aria-current="page"] { background: var(--blue-soft); color: var(--blue-dark); font-weight: 600; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.file-picker select, select, input[type=number], input[type=text], input[type=search] { min-height: 38px; padding: 0 10px; border: 1px solid var(--line-2); border-radius: 8px; background: #fff; }
.file-picker select { font-family: var(--mono); font-size: 13px; max-width: 260px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 38px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--line-2); background: #fff; color: var(--ink); font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover { border-color: var(--blue); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.primary:hover { background: var(--blue-dark); }
.btn.gold { background: var(--gold); border-color: var(--gold); color: var(--ink); }
.btn:disabled { opacity: 0.55; cursor: progress; }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }
:focus-visible { outline: 3px solid #7FB0DE; outline-offset: 2px; }

.banner { margin: 14px 20px 0; padding: 10px 14px; border-radius: 8px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.banner.ok { background: #DCFAE6; color: var(--ok); }
.banner.error { background: var(--err-bg); color: var(--err); }
.banner.info { background: var(--blue-soft); color: var(--blue-dark); }
.banner pre { flex-basis: 100%; margin: 0; white-space: pre-wrap; font-family: var(--mono); font-size: 12px; max-height: 240px; overflow: auto; }

main { flex: 1 1 auto; padding: 16px 20px 20px; }
.view { display: flex; flex-direction: column; gap: 16px; }
.view.narrow { max-width: 1240px; margin: 0 auto; width: 100%; }
.row { display: flex; flex-wrap: wrap; gap: 16px; align-items: stretch; }
.row.top { align-items: flex-start; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; min-width: 0; }
.panel-head { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); }

/* code editor */
.code-panel { flex: 999 1 560px; display: flex; flex-direction: column; background: var(--code-bg); border-color: var(--code-bg); height: min(72vh, 760px); min-height: 420px; }
.code-head { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid #22303D; color: #A9B4C2; font-size: 13px; font-family: var(--mono); }
.code-head .muted { color: #8A99A8; font-family: var(--sans); }
.dirty { color: var(--gold); font-family: var(--sans); font-weight: 600; }
.code-body { position: relative; display: flex; flex: 1 1 auto; min-height: 0; }
.gutter { margin: 0; padding: 14px 12px 14px 0; width: 48px; flex: none; text-align: right; color: var(--code-gutter); font: 13px/21px var(--mono); overflow: hidden; user-select: none; }
#code { flex: 1 1 auto; min-width: 0; border: none; resize: none; margin: 0; padding: 14px 14px 14px 4px; background: transparent; color: var(--code-fg); font: 13px/21px var(--mono); tab-size: 4; outline: none; white-space: pre; overflow: auto; }

/* preview */
.preview { flex: 1 1 420px; display: flex; flex-direction: column; height: min(72vh, 760px); min-height: 420px; }
.subtabs { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px; border-bottom: 1px solid var(--line); }
.subtab { min-height: 38px; padding: 0 12px; border: none; border-radius: 8px; background: transparent; color: var(--ink-2); cursor: pointer; }
.subtab[aria-selected="true"] { background: var(--blue-soft); color: var(--blue-dark); font-weight: 600; }
.badge { margin-left: 6px; padding: 1px 7px; border-radius: 999px; font-size: 12px; background: #DCFAE6; color: var(--ok); }
.badge.bad { background: var(--warn-bg); color: var(--warn); }
.preview-body { flex: 1 1 auto; overflow: auto; padding: 16px; min-height: 0; }
.xml { margin: 0; font: 12px/20px var(--mono); background: #FAFBFC; white-space: pre; }
.checks { display: flex; flex-direction: column; gap: 10px; }
.check-item { display: flex; gap: 10px; padding: 10px 12px; border-radius: 8px; }
.check-item strong { width: 56px; flex: none; font-size: 12px; }
.check-item .title { font-weight: 600; }
.check-item.ok { background: var(--ok-bg); color: var(--ok); }
.check-item.warning { background: var(--warn-bg); color: var(--warn); }
.check-item.error { background: var(--err-bg); color: var(--err); }

/* FMU block */
.block-wrap { display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 12px 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-param { padding: 5px 10px; border-radius: 999px; background: var(--gold-soft); color: var(--gold-ink); font-size: 13px; font-weight: 500; }
.block-row { display: flex; align-items: center; justify-content: center; width: 100%; max-width: 520px; }
.ports { display: flex; flex-direction: column; gap: 12px; flex: 1 1 0; min-width: 0; }
.ports.in { align-items: flex-end; }
.ports.out { align-items: flex-start; }
.port { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); }
.port i { width: 20px; height: 12px; border-radius: 3px; background: var(--gold); flex: none; }
.port span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 180px; }
.block { width: 150px; min-height: 150px; flex: none; border-radius: 22px; background: var(--blue); color: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 12px; text-align: center; }
.block b { font-size: 15px; word-break: break-word; }
.block small { color: #D6E2EE; }

/* tables */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; min-width: 760px; }
.table th { text-align: left; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; padding: 10px 8px; }
.table td { padding: 8px; border-top: 1px solid #EEF1F5; vertical-align: top; }
.table th:first-child, .table td:first-child { padding-left: 16px; }
.mono { font-family: var(--mono); font-size: 13px; }
.pill { display: inline-block; font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 6px; background: var(--blue-soft); color: var(--blue-dark); }
.caus-input { background: var(--gold-soft); color: var(--gold-ink); }
.caus-output { background: #E3F2EA; color: var(--ok); }
.caus-structuralParameter { background: #EDE7F6; color: #4A2C83; }
.caus-independent, .caus-local { background: #F2F4F7; color: var(--ink-2); }
.flag { font-size: 12px; padding: 3px 8px; border-radius: 6px; }
.flag.warning { background: var(--warn-bg); color: var(--warn); }
.flag.error { background: var(--err-bg); color: var(--err); }
.flag.ok { color: var(--ok); }

/* simulate */
.settings { flex: 1 1 320px; max-width: 100%; padding: 18px; display: flex; flex-direction: column; gap: 14px; overflow: visible; }
fieldset { border: none; margin: 0; padding: 0; }
legend { font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 8px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.grid2 select, .grid2 input[type=number] { width: 100%; }
.grid2 label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.grid2 label.check { flex-direction: row; align-items: center; gap: 8px; font-weight: 500; }
.chip-btn { min-height: 38px; padding: 0 12px; border-radius: 999px; border: 1px solid var(--line-2); background: #fff; cursor: pointer; }
.chip-btn[aria-pressed="true"] { background: var(--blue); border-color: var(--blue); color: #fff; font-weight: 600; }
.chip-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.params { display: flex; flex-direction: column; gap: 12px; }
.param { display: flex; flex-direction: column; gap: 4px; }
.param-head { display: flex; align-items: center; gap: 8px; }
.param-head .mono { font-weight: 600; }
.param-head input { width: 110px; margin-left: auto; min-height: 32px; }
.param input[type=range] { width: 100%; accent-color: var(--blue); }
.results { flex: 999 1 600px; min-width: 0; display: flex; flex-direction: column; gap: 14px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; }
.stat .k { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.stat .v { font-size: 24px; font-weight: 700; margin-top: 4px; }
.series-picker { display: flex; flex-wrap: wrap; gap: 6px; }
.series-picker label { display: inline-flex; align-items: center; gap: 6px; min-height: 34px; padding: 0 10px; border: 1px solid var(--line-2); border-radius: 999px; background: #fff; font-family: var(--mono); font-size: 12px; cursor: pointer; }
.series-picker input { accent-color: var(--blue); }
.charts { display: flex; flex-direction: column; gap: 14px; }
.chart { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px 8px; }
.chart figcaption { display: flex; gap: 10px; align-items: baseline; font-weight: 600; margin-bottom: 4px; }
.chart figcaption .mono { font-weight: 400; color: var(--muted); }
.chart svg { display: block; width: 100%; height: auto; }
.chart .readout { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--ink-2); font-weight: 400; }
.empty { padding: 40px 16px; text-align: center; color: var(--muted); background: #fff; border: 1px dashed var(--line-2); border-radius: 12px; }
.log summary { padding: 12px 16px; cursor: pointer; font-weight: 600; }
.log pre { margin: 0; padding: 0 16px 16px; font: 12px/18px var(--mono); white-space: pre-wrap; max-height: 300px; overflow: auto; }

/* inspector */
.drop { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding: 16px 18px; border: 2px dashed #B8C3D0; border-radius: 12px; background: #fff; }
.drop.over { border-color: var(--blue); background: var(--blue-soft); }
.drop .grow { display: flex; flex-direction: column; gap: 2px; min-width: 220px; }
.summary { display: flex; flex-direction: column; gap: 12px; padding: 18px; }
.summary dl { margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px 24px; }
.summary dt { color: var(--muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.summary dd { margin: 2px 0 0; word-break: break-word; }
.tag { padding: 4px 10px; border-radius: 999px; background: #F2F4F7; color: var(--ink-2); font-size: 13px; }
.tag.strong { background: var(--blue-soft); color: var(--blue-dark); font-weight: 600; }

/* templates */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 8px 0; }
.search { flex: 1 1 260px; }
.search input { width: 100%; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { display: flex; flex-direction: column; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.card h2 { font-size: 16px; }
.card p { margin: 0; color: var(--ink-2); flex: 1 1 auto; }

.statusbar { display: flex; flex-wrap: wrap; gap: 12px; padding: 8px 20px; border-top: 1px solid var(--line); background: #fff; color: var(--muted); font-size: 12px; }

@media (max-width: 640px) {
  .topbar { padding: 10px 16px; }
  main { padding: 12px 16px; }
  .grid2 { grid-template-columns: minmax(0, 1fr); }
}

/* web app additions */
.loading { position: fixed; inset: 0; z-index: 50; background: var(--bg); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 24px; text-align: center; }
.loading h1 { margin: 6px 0 0; }
.loading .bar { width: min(320px, 80vw); height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; }
.loading .bar span { display: block; width: 40%; height: 100%; background: var(--blue); border-radius: 999px; animation: slide 1.2s ease-in-out infinite; }
@keyframes slide { 0% { transform: translateX(-100%); } 100% { transform: translateX(250%); } }
@media (prefers-reduced-motion: reduce) { .loading .bar span { animation: none; width: 100%; } }
.loading.failed .bar { display: none; }
.code-btn { min-height: 30px; padding: 0 10px; border-radius: 6px; border: 1px solid #33424F; background: transparent; color: #D6DEEB; font: 12px var(--sans); cursor: pointer; display: inline-flex; align-items: center; }
.code-btn:hover { border-color: #7FB0DE; }
.linkish { border: none; background: none; padding: 0; color: var(--blue); font: inherit; text-decoration: underline; cursor: pointer; }
.statusbar a { color: var(--blue); }

/* assistant */
.tag-new { margin-left: 4px; padding: 1px 6px; border-radius: 999px; background: var(--gold); color: var(--ink); font-size: 11px; font-weight: 700; }
.view.assistant { max-width: 920px; margin: 0 auto; width: 100%; }
.agent-head { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: flex-end; justify-content: space-between; }
.agent-head p { margin: 0; max-width: 60ch; }
.agent-controls { display: flex; gap: 8px; flex-wrap: wrap; }
.agent-key { padding: 20px; display: flex; flex-direction: column; gap: 12px; }
.agent-key p { margin: 0; max-width: 70ch; line-height: 1.5; }
.agent-key-row { display: flex; gap: 8px; flex-wrap: wrap; }
.agent-key-row input { width: 100%; min-height: 38px; padding: 0 10px; border: 1px solid var(--line-2); border-radius: 8px; font-family: var(--mono); }
.agent-key .check { display: flex; gap: 8px; align-items: center; }
.agent-chat { display: flex; flex-direction: column; min-height: 520px; height: calc(100vh - 250px); }
.agent-log { flex: 1 1 auto; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.agent-empty { padding: 0 18px 12px; }
.agent-suggestions { display: flex; flex-wrap: wrap; gap: 8px; }
.agent-suggest { text-align: left; padding: 9px 12px; border: 1px solid var(--line-2); border-radius: 10px; background: #fff; cursor: pointer; max-width: 100%; }
.agent-suggest:hover { border-color: var(--blue); background: var(--blue-soft); }
.msg { max-width: 82%; padding: 10px 14px; border-radius: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.msg p { margin: 0 0 8px; } .msg p:last-child { margin-bottom: 0; }
.msg ul, .msg ol { margin: 0 0 8px; padding-left: 20px; }
.msg pre { margin: 0 0 8px; padding: 10px; border-radius: 8px; background: var(--code-bg); color: var(--code-fg); font-family: var(--mono); font-size: 12px; overflow-x: auto; }
.msg code { font-family: var(--mono); font-size: 12.5px; background: var(--bg); padding: 1px 4px; border-radius: 4px; }
.msg.user { align-self: flex-end; background: var(--blue); color: #fff; white-space: pre-wrap; }
.msg.assistant { align-self: flex-start; background: var(--bg); }
.msg.thinking { align-self: flex-start; color: var(--muted); display: flex; gap: 8px; align-items: center; padding: 6px 2px; }
.dots { width: 26px; height: 8px; background: radial-gradient(circle, var(--blue) 3px, transparent 3.5px) 0 0 / 9px 8px repeat-x; animation: dots 1s steps(3) infinite; }
@keyframes dots { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }
.step { align-self: flex-start; display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center; padding: 6px 10px; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; max-width: 100%; }
.step-label { font-family: var(--mono); font-size: 12.5px; }
.step-out { color: var(--muted); }
.step-icon { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); flex: none; }
.step.running .step-icon { background: var(--gold); animation: pulse 1s ease-in-out infinite; }
.step.ok .step-icon { background: var(--ok); }
.step.warn .step-icon { background: var(--gold); }
.step.bad { border-color: #F5C2BE; } .step.bad .step-icon { background: var(--err); } .step.bad .step-out { color: var(--err); }
.step details { flex-basis: 100%; } .step pre { max-height: 200px; overflow: auto; font-size: 11.5px; white-space: pre-wrap; margin: 6px 0 0; }
@keyframes pulse { 50% { opacity: 0.35; } }
.agent-note { align-self: center; color: var(--muted); font-size: 13px; text-align: center; }
.agent-note.bad { color: var(--err); background: var(--err-bg); padding: 6px 12px; border-radius: 8px; }
.agent-composer { display: flex; gap: 8px; align-items: flex-end; padding: 12px; border-top: 1px solid var(--line); }
.agent-composer textarea { flex: 1 1 auto; resize: vertical; min-height: 44px; max-height: 240px; padding: 10px; border: 1px solid var(--line-2); border-radius: 8px; line-height: 1.4; }
.agent-foot { display: flex; flex-wrap: wrap; gap: 6px 12px; padding: 0 12px 10px; }
@media (max-width: 640px) { .msg { max-width: 100%; } .agent-chat { height: auto; min-height: 70vh; } }
@media (prefers-reduced-motion: reduce) { .dots, .step.running .step-icon { animation: none; } }