:root {
  color-scheme: dark;
  --bg: #0b1c25; --rail: #06141c; --panel: #112630; --line: #2d4b59;
  --ink: #e6f2f5; --muted: #a6bfca; --mint: #5ce0bd; --blue: #82ccf4; --warn: #edc175;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
button, input, select, textarea { font: inherit; }
button, .file-button { border: 1px solid var(--line); border-radius: 6px; background: #152f3c; color: var(--ink); padding: 9px 12px; cursor: pointer; line-height: 1.4; }
button:hover, .file-button:hover { border-color: var(--mint); }
button:disabled { opacity: .5; cursor: not-allowed; }
button:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible,
textarea:focus-visible, select:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
input, select, textarea { display: block; background: #0a202b; border: 1px solid var(--line); border-radius: 5px; color: var(--ink); padding: 9px; width: 100%; min-width: 0; }
label { display: block; margin: 12px 0 6px; color: var(--muted); }
p { line-height: 1.55; color: var(--muted); margin: 8px 0; }
h1, h2, h3 { margin: 0; font-size: 14px; }
h3 { font-size: 20px; }
a { color: var(--mint); }
.app-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 22px; background: linear-gradient(110deg, #113e3d, #142a41 65%, #27273e); border-bottom: 1px solid #4b8392; }
.brand { font-size: 18px; font-weight: 650; text-decoration: none; color: var(--ink); }
.brand span { font-weight: 400; font-size: 12px; margin-left: 16px; color: var(--muted); }
nav { display: flex; gap: 8px; flex-wrap: wrap; }
.workspace { display: grid; grid-template-columns: 204px minmax(0, 1fr); min-height: calc(100vh - 69px); }
aside { background: var(--rail); padding: 20px 14px; border-right: 1px solid var(--line); }
.rail-title { display: flex; justify-content: space-between; align-items: center; }
.environment { color: var(--warn); font-size: 11px; }
.rail-title h1 { font-size: 13px; }
aside section, aside details { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
aside h2, summary { font-size: 12px; font-weight: 600; }
summary { cursor: pointer; }
.file-button { display: block; text-align: center; color: var(--ink); }
.file-button:has(+input:disabled) { opacity: .5; cursor: not-allowed; }
#library { width: 100%; white-space: normal; margin-top: 12px; }
.chart-buttons { display: flex; gap: 6px; margin-top: 10px; }
main { min-width: 0; padding: 22px; }
.workspace-status { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 12px; margin-bottom: 16px; }
.chart-panel { border: 1px solid #416676; border-radius: 8px; overflow: hidden; background: var(--panel); }
.chart-heading { display: flex; gap: 18px; justify-content: space-between; padding: 18px 20px; }
.chart-heading h2 { font-size: 22px; }
.chart-heading p { font-size: 12px; }
.chart-stage { position: relative; min-height: 540px; }
canvas { display: block; width: 100%; height: 540px; touch-action: none; }
#empty-chart { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 30px; }
#empty-chart p { max-width: 430px; }
#empty-chart[hidden] { display: none; }
.chart-help { padding: 12px 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
#notice { margin-top: 16px; padding: 12px 0; color: var(--warn); line-height: 1.5; }
.study-row { display: flex; gap: 8px; align-items: center; border-bottom: 1px solid var(--line); padding: 12px 0; }
.study-row .study-name { min-width: 0; flex: 1; overflow-wrap: anywhere; }
.study-name strong, .study-name small { display: block; }
.study-name small { font-size: 12px; color: var(--muted); margin-top: 4px; }
.icon-button { padding: 6px 9px; min-width: 32px; }
.icon-button svg, .close-dialog svg { display: block; }
.value-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; font-variant-numeric: tabular-nums; }
.value-row span { overflow-wrap: anywhere; min-width: 0; }
.value-row b { white-space: nowrap; }
dialog { width: min(720px, calc(100vw - 32px)); max-height: calc(100dvh - 40px); padding: 24px; border: 1px solid #507b8c; border-radius: 9px; color: var(--ink); background: var(--rail); overflow: auto; }
dialog::backdrop { background: #0009; }
.dialog-title { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 20px; }
.dialog-title h2 { font-size: 19px; }
.close-dialog { font-size: 22px; line-height: 1; padding: 7px 10px; }
.note { font-size: 12px; }
.setup-step { border-top: 1px solid var(--line); margin-top: 22px; padding-top: 18px; }
.setup-step summary { font-size: 14px; margin-bottom: 12px; }
.setup-step p { max-width: 72ch; }
.setup-step code { overflow-wrap: anywhere; }
.setup-step a { text-underline-offset: 3px; }
.text-action { border: 0; background: transparent; color: var(--mint); text-decoration: underline; text-underline-offset: 3px; padding: 0; }
#setup-result-status { color: var(--warn); white-space: pre-line; }
#setup-registration, #setup-public-config, #broker-request { font-size: 12px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
textarea { font-family: ui-monospace, SFMono-Regular, monospace; resize: vertical; margin-bottom: 12px; }
.route-flow { list-style: decimal; margin: 22px 0; padding: 0 0 0 22px; display: grid; gap: 12px; }
.route-flow li { padding: 8px 12px; }
.route-flow li::marker { color: var(--mint); font-variant-numeric: tabular-nums; }
.route-flow strong, .route-flow span { display: block; }
.route-flow span { color: var(--muted); margin-top: 5px; }
.connection-state { padding: 18px 0; margin-bottom: 16px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
li { line-height: 1.6; }
#settings-fields fieldset { border: 1px solid var(--line); margin: 16px 0; padding: 16px; }
#settings-fields legend { color: var(--mint); }
#settings-fields input[type=checkbox] { width: auto; display: inline-block; margin-right: 12px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
[hidden] { display: none !important; }
#management-detail { border-top: 1px solid var(--line); margin-top: 20px; padding-top: 20px; }
#management-title { font-size: 17px; overflow-wrap: anywhere; }
#management-id, #management-history li { overflow-wrap: anywhere; }
.management-notice { white-space: pre-line; }
.management-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: end; margin: 12px 0; }
.management-check { display: flex; align-items: flex-start; gap: 8px; }
.management-check input { width: auto; margin-top: 3px; }
.broker-actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.broker-button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-block: 24px 16px; }
.broker-choice { display: flex; flex-direction: column; gap: 7px; align-items: flex-start; padding: 16px 20px; min-width: 165px; text-align: start; }
.broker-choice strong { font-size: 17px; }
.broker-choice span { color: var(--muted); font-size: 12px; }
.broker-popup { max-width: 720px; margin-inline: auto; padding: 24px; }
.broker-popup-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.broker-popup-heading h1 { font-size: 21px; }
.broker-popup #broker-links-status { margin-block: 24px 16px; }
@media (max-width: 520px) { .broker-button-row { flex-direction: column; } .broker-choice { width: 100%; } .broker-popup { padding: 20px; } .broker-popup input, .broker-popup select { font-size: 16px; } }
.broker-connection { border-top: 1px solid var(--line); padding-block: 20px; }
.broker-connection-heading { display: flex; gap: 12px; justify-content: space-between; align-items: baseline; flex-wrap: wrap; }
.broker-connection-heading strong, .broker-connection p, #broker-links-status, #broker-disconnect-name { overflow-wrap: anywhere; }
.broker-state { font-size: 12px; color: var(--mint); }
.broker-warning, #broker-links-status { color: var(--warn); }
.broker-account-picker { margin: 16px 0; padding: 12px; border: 1px solid var(--line); min-width: 0; }
.broker-account { display: flex; align-items: flex-start; gap: 12px; padding: 8px 0; margin: 0; }
.broker-account input { width: auto; flex: 0 0 auto; margin-top: 4px; accent-color: var(--mint); }
.broker-account span { min-width: 0; overflow-wrap: anywhere; }
.broker-account strong, .broker-account small { display: block; }
.broker-account small { color: var(--muted); margin-top: 4px; }
#broker-oauth-progress { margin-block: 16px; }
#broker-oauth-progress a { display: inline-block; margin-inline-end: 16px; margin-block: 8px; }
#broker-callback { overflow-wrap: anywhere; }
#management-status { white-space: pre-line; color: var(--warn); }
@media (max-width: 760px) {
  .app-header { align-items: flex-start; padding: 14px 16px; }
  .brand span { display: block; margin: 4px 0 0; }
  nav { justify-content: flex-end; gap: 5px; }
  nav button { padding: 7px 9px; }
  .workspace { grid-template-columns: 1fr; }
  aside { border-right: 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  aside .rail-title, aside details { grid-column: 1 / -1; }
  aside section, aside details { margin: 0; padding-top: 14px; }
  main { padding: 16px; }
  .chart-heading { padding: 14px; }
  .chart-stage, canvas { min-height: 420px; height: 420px; }
  .workspace-status { flex-wrap: wrap; }
  .form-grid { grid-template-columns: 1fr; }
  dialog { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto; } }