:root {
  color-scheme: light;
  --paper: #f7f6f3;
  --surface: #ffffff;
  --ink: #242523;
  --muted: #7b7c76;
  --faint: #a7a8a1;
  --line: #e4e3df;
  --line-dark: #d2d1cb;
  --green: #3e6949;
  --green-soft: #edf3ec;
  --yellow: #956400;
  --yellow-soft: #fbf3db;
  --red: #9f2f2d;
  --red-soft: #fdebec;
  --mono: "SFMono-Regular", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  --sans: "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }
html, body, #root { min-height: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: wait; }

.page-shell { width: min(1440px, calc(100% - 56px)); margin: 0 auto; padding: 64px 0 28px; }
.page-header { display: flex; justify-content: space-between; gap: 40px; align-items: flex-end; padding-bottom: 44px; border-bottom: 1px solid var(--line); }
.wordmark, .module-index, .provider-line, .page-footer, .readout-state, .run-label { font: 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.wordmark { color: var(--green); }
.page-header h1 { max-width: 640px; margin: 18px 0 10px; font: 400 clamp(32px, 4vw, 58px)/1.03 var(--serif); letter-spacing: -.035em; }
.page-header p { max-width: 560px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.header-status { display: flex; align-items: center; gap: 9px; padding-bottom: 5px; color: var(--muted); font: 11px var(--mono); white-space: nowrap; }
.status-dot { width: 7px; height: 7px; border-radius: 999px; background: var(--green); }
.status-dot.offline { background: var(--red); }

.module-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 18px; padding-top: 24px; }
.module { min-width: 0; border: 1px solid var(--line); background: var(--surface); }
.module-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding: 28px 30px 24px; border-bottom: 1px solid var(--line); }
.module-index { color: var(--faint); }
.module h2 { margin: 10px 0 0; font-size: 20px; font-weight: 500; letter-spacing: -.025em; }
.text-button, .link-button { border: 0; background: transparent; color: var(--muted); font: 10px var(--mono); text-decoration: underline; text-underline-offset: 3px; }
.text-button:hover, .link-button:hover { color: var(--ink); }
.run-label { color: var(--faint); }
.run-label.running { color: var(--yellow); }
.run-label.complete { color: var(--green); }
.run-label.blocked, .run-label.error { color: var(--red); }

.history { min-height: 255px; max-height: 405px; overflow: auto; padding: 22px 30px; }
.history-empty { display: flex; min-height: 205px; align-items: center; justify-content: center; flex-direction: column; gap: 12px; border: 1px dashed var(--line-dark); color: var(--faint); font-size: 13px; }
.history-item { display: grid; grid-template-columns: 72px 1fr; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.history-item > span { padding-top: 2px; color: var(--faint); font: 10px var(--mono); text-transform: uppercase; }
.history-item p { margin: 0; color: var(--ink); font-size: 13px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; }
.history-item.assistant p { color: var(--green); }
.history-item.error p { color: var(--red); }

.composer { border-top: 1px solid var(--line); }
.composer > label { display: block; padding: 20px 30px 0; color: var(--muted); font: 10px var(--mono); text-transform: uppercase; }
.composer textarea { display: block; width: 100%; min-height: 146px; resize: vertical; padding: 12px 30px 20px; border: 0; outline: 0; background: var(--surface); color: var(--ink); font-size: 15px; line-height: 1.65; }
.composer textarea::placeholder { color: var(--faint); }
.composer textarea:focus { background: #fcfcfb; }
.composer-footer { display: flex; justify-content: space-between; gap: 18px; align-items: flex-end; padding: 16px 30px 22px; border-top: 1px solid var(--line); }
.field-row { display: flex; gap: 16px; align-items: flex-end; }
.select-field, .model-field { display: flex; flex-direction: column; gap: 7px; }
.select-field span, .model-field span { color: var(--faint); font: 9px var(--mono); text-transform: uppercase; }
.select-field select, .model-field input { height: 34px; border: 1px solid var(--line); border-radius: 4px; outline: 0; background: var(--paper); color: var(--muted); font: 11px var(--mono); }
.select-field select { width: 122px; padding: 0 8px; }
.model-field input { width: 170px; padding: 0 9px; }
.select-field select:focus, .model-field input:focus { border-color: var(--line-dark); color: var(--ink); }
.primary-button { min-width: 120px; height: 38px; padding: 0 18px; border: 1px solid var(--ink); border-radius: 4px; background: var(--ink); color: #fff; font: 11px var(--mono); text-transform: uppercase; }
.primary-button:hover { background: #3a3b38; }
.primary-button:active { transform: scale(.98); }
.primary-button:disabled { opacity: .45; }

.provider-line { display: grid; grid-template-columns: auto 1fr auto 1fr; gap: 10px 14px; align-items: center; padding: 18px 30px; border-bottom: 1px solid var(--line); color: var(--faint); }
.provider-line strong { color: var(--ink); font-weight: 400; text-transform: none; letter-spacing: 0; }
.provider-line strong.ready { color: var(--green); }
.provider-line strong.warning { color: var(--yellow); }
.readout { margin: 22px 30px 0; border: 1px solid var(--line); background: #fcfcfb; }
.readout-header { display: flex; justify-content: space-between; gap: 18px; align-items: flex-start; padding: 17px 18px 14px; border-bottom: 1px solid var(--line); }
.readout-header > div { display: flex; gap: 12px; align-items: flex-start; }
.readout-index { display: grid; place-items: center; width: 21px; height: 21px; background: var(--ink); color: white; font: 10px var(--mono); }
.readout h3 { margin: 0; font-size: 13px; font-weight: 500; }
.readout p { margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.readout-state { padding-top: 3px; color: var(--green); }
.readout pre, .raw-details pre { min-height: 116px; max-height: 258px; margin: 0; padding: 18px; overflow: auto; color: #535852; font: 11px/1.65 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.returned-readout { background: var(--surface); }
.final-answer { min-height: 116px; padding: 20px 18px; color: var(--faint); font: 14px/1.65 var(--sans); white-space: pre-wrap; overflow-wrap: anywhere; }
.final-answer.filled { color: var(--ink); }
.raw-details { margin: 18px 30px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.raw-details summary { padding: 14px 0; color: var(--muted); cursor: pointer; font: 10px var(--mono); list-style: none; }
.raw-details summary::-webkit-details-marker { display: none; }
.raw-details summary::before { display: inline-block; width: 18px; content: "+"; color: var(--green); }
.raw-details[open] summary::before { content: "−"; }
.raw-details pre { max-height: 180px; padding: 0 0 17px; }
.module-note { display: flex; gap: 10px; margin: 22px 30px 0; padding: 13px 0 0; border-top: 1px solid var(--line); }
.note-mark { flex: 0 0 auto; color: var(--green); font: 12px var(--serif); }
.module-note p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.notice { margin: 18px 30px 0; padding: 12px 14px; font-size: 12px; line-height: 1.5; }
.warning-notice { background: var(--yellow-soft); color: var(--yellow); }
.error-notice { background: var(--red-soft); color: var(--red); }
.page-footer { display: flex; justify-content: space-between; gap: 16px; padding-top: 18px; color: var(--faint); }
.file-tool { margin-top: 18px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; }
.file-tool summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 18px 2px; cursor: pointer; list-style: none; color: var(--muted); font: 10px var(--mono); text-transform: uppercase; }
.file-tool summary::-webkit-details-marker { display: none; }
.file-tool summary > span:first-child { display: flex; align-items: baseline; gap: 12px; }
.file-tool summary strong { color: var(--ink); font: 500 13px var(--sans); text-transform: none; }
.file-tool summary small { color: var(--faint); font: 10px var(--mono); text-transform: uppercase; }
.file-tool summary::before { content: "+"; color: var(--green); }
.file-tool[open] summary::before { content: "−"; }
.file-form { display: flex; justify-content: space-between; align-items: flex-end; gap: 28px; padding: 22px 2px 24px; border-top: 1px solid var(--line); }
.file-form > div { min-width: 0; }
.file-form label { display: block; margin-bottom: 9px; color: var(--ink); font-size: 13px; }
.file-form input { max-width: 100%; color: var(--muted); font: 11px var(--mono); }
.file-form p { max-width: 650px; margin: 10px 0 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.secondary-button { flex: 0 0 auto; min-width: 112px; height: 36px; padding: 0 16px; border: 1px solid var(--line-dark); border-radius: 4px; background: var(--surface); color: var(--ink); font: 10px var(--mono); text-transform: uppercase; }
.secondary-button:hover { border-color: var(--ink); }
.secondary-button:disabled { opacity: .45; }
.file-result { display: flex; justify-content: space-between; gap: 18px; padding: 14px 2px; border-top: 1px solid var(--line); font: 11px var(--mono); }
.file-result.success { color: var(--green); }
.file-result.failure { color: var(--red); }
.file-result a { color: inherit; overflow-wrap: anywhere; }

@media (max-width: 900px) {
  .page-shell { width: min(100% - 32px, 720px); padding-top: 34px; }
  .page-header { display: block; padding-bottom: 28px; }
  .header-status { margin-top: 24px; }
  .module-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .page-shell { width: calc(100% - 24px); }
  .module-header, .history, .composer > label, .composer textarea, .composer-footer, .provider-line { padding-left: 18px; padding-right: 18px; }
  .readout, .raw-details { margin-left: 18px; margin-right: 18px; }
  .module-note, .notice { margin-left: 18px; margin-right: 18px; }
  .composer-footer { display: block; }
  .field-row { margin-bottom: 16px; }
  .model-field input { width: 145px; }
  .primary-button { width: 100%; }
  .provider-line { grid-template-columns: auto 1fr; }
  .page-footer { display: block; line-height: 2; }
  .file-tool summary > span:first-child { display: block; }
  .file-tool summary small { display: block; margin-top: 5px; }
  .file-form, .file-result { display: block; }
  .secondary-button { width: 100%; margin-top: 18px; }
  .file-result a { display: block; margin-top: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}