:root {
  color-scheme: light;
  --canvas: #f5f7f8;
  --panel: #ffffff;
  --panel-muted: #f8fafb;
  --text: #17202a;
  --muted: #66717d;
  --border: #dde2e7;
  --accent: #245b78;
  --accent-soft: #e9f1f5;
  --green: #19764b;
  --green-soft: #e9f6ef;
  --amber: #996800;
  --amber-soft: #fff5d8;
  --red: #b42318;
  --red-soft: #fcebea;
  --shadow: 0 8px 28px rgb(23 32 42 / 8%);
  --radius: 10px;
  --sidebar: 240px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #11171c;
  --panel: #182027;
  --panel-muted: #1d272f;
  --text: #edf2f5;
  --muted: #a3afb9;
  --border: #34414b;
  --accent: #71aac8;
  --accent-soft: #213946;
  --green: #63c494;
  --green-soft: #183b2c;
  --amber: #e3b952;
  --amber-soft: #3d3217;
  --red: #f38b83;
  --red-soft: #442321;
  --shadow: 0 8px 30px rgb(0 0 0 / 26%);
}

* { box-sizing: border-box; }
html { min-width: 0; background: var(--canvas); }
body { min-width: 0; margin: 0; background: var(--canvas); color: var(--text); font-size: 14px; line-height: 1.5; }
button, input, textarea, select { font: inherit; }
button, input, select { min-height: 44px; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }
a { color: var(--accent); }
code, pre, .mono { font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace; }
img, svg { max-width: 100%; }

:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 10px 14px; border-radius: 8px; background: var(--text); color: var(--panel); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.noscript { margin: 16px; padding: 16px; border: 1px solid var(--red); border-radius: var(--radius); background: var(--red-soft); color: var(--red); }

.boot-screen, .auth-screen { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.boot-card, .auth-card { width: min(100%, 520px); border: 1px solid var(--border); border-radius: 14px; background: var(--panel); box-shadow: var(--shadow); }
.boot-card { display: flex; align-items: center; gap: 16px; padding: 24px; }
.boot-card h1, .boot-card p { margin: 0; }
.boot-card p { color: var(--muted); }
.brand-mark { display: grid; flex: 0 0 auto; width: 40px; height: 40px; place-items: center; border-radius: 10px; background: var(--accent); color: #fff; font-weight: 750; }
.auth-card { padding: 24px; }
.auth-card > header { margin-bottom: 20px; }
.auth-card h1 { margin: 10px 0 4px; font-size: 24px; }
.auth-card header p { margin: 0; color: var(--muted); }
.auth-tabs { display: flex; gap: 4px; margin: 0 0 20px; padding: 4px; border-radius: 10px; background: var(--panel-muted); }
.auth-tabs button { flex: 1; border: 0; border-radius: 7px; background: transparent; color: var(--muted); }
.auth-tabs button[aria-selected="true"] { background: var(--panel); color: var(--text); box-shadow: 0 1px 4px rgb(23 32 42 / 10%); }

.shell { min-height: 100vh; }
.sidebar { position: fixed; z-index: 30; inset: 0 auto 0 0; width: var(--sidebar); overflow-y: auto; border-right: 1px solid var(--border); background: var(--panel); transition: transform .18s ease; }
.sidebar-header { display: flex; min-height: 64px; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.sidebar-header strong { font-size: 15px; }
.sidebar-header small { display: block; color: var(--muted); }
.nav-group { padding: 12px 8px 4px; }
.nav-label { margin: 0 8px 6px; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.nav-button { display: flex; width: 100%; min-height: 44px; align-items: center; gap: 10px; padding: 8px 10px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); text-align: left; }
.nav-button:hover { background: var(--panel-muted); color: var(--text); }
.nav-button[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 650; }
.nav-icon { width: 18px; text-align: center; }
.sidebar-footer { padding: 12px; }

.workspace { min-width: 0; margin-left: var(--sidebar); }
.topbar { position: sticky; z-index: 20; top: 0; display: flex; min-height: 64px; align-items: center; justify-content: space-between; gap: 16px; padding: 8px 24px; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--panel) 94%, transparent); backdrop-filter: blur(10px); }
.breadcrumb { min-width: 0; }
.breadcrumb small { display: block; color: var(--muted); }
.breadcrumb strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.menu-button { display: none; }
.main { width: min(100%, 1480px); margin: 0 auto; padding: 24px; }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-header h1 { margin: 0 0 4px; font-size: 22px; }
.page-header p { margin: 0; color: var(--muted); }

.grid { display: grid; gap: 12px; }
.metrics { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 12px; }
.two-column { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.metric, .card { min-width: 0; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); }
.metric { padding: 16px; }
.metric-label { color: var(--muted); font-size: 12px; }
.metric-value { display: block; margin: 4px 0; font-size: 22px; font-weight: 720; font-variant-numeric: tabular-nums; }
.metric-note { color: var(--muted); font-size: 12px; }
.card { margin-bottom: 12px; }
.card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 16px; border-bottom: 1px solid var(--border); }
.card-header h2, .card-header h3 { margin: 0; font-size: 15px; }
.card-header p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.card-body { padding: 16px; }
.card-footer { padding: 12px 16px; border-top: 1px solid var(--border); background: var(--panel-muted); border-radius: 0 0 var(--radius) var(--radius); color: var(--muted); }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.field { min-width: 0; }
.field.full { grid-column: 1 / -1; }
.field label, .field-label { display: block; margin-bottom: 6px; font-weight: 650; }
.field-hint { margin: 5px 0 0; color: var(--muted); font-size: 12px; }
.input-wrap { position: relative; }
input, textarea, select { width: 100%; border: 1px solid var(--border); border-radius: 8px; background: var(--panel); color: var(--text); }
input, select { padding: 9px 11px; }
textarea { min-height: 110px; padding: 10px 11px; resize: vertical; }
textarea.code-editor { min-height: 300px; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; tab-size: 2; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); outline: 3px solid color-mix(in srgb, var(--accent) 16%, transparent); }
.input-action { position: absolute; top: 3px; right: 3px; min-width: 38px; min-height: 38px; border: 0; border-radius: 6px; background: var(--panel-muted); color: var(--muted); }
.form-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.inline-form { display: flex; flex-wrap: wrap; align-items: end; gap: 8px; }
.inline-form .field { flex: 1 1 180px; }

.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 7px; padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel); color: var(--text); font-weight: 650; text-decoration: none; }
.button:hover { background: var(--panel-muted); }
.button.primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.button.danger { border-color: var(--red); color: var(--red); }
.button.ghost { border-color: transparent; background: transparent; }
.button.small { min-height: 36px; padding: 5px 10px; font-size: 12px; }
.icon-button { display: inline-grid; width: 44px; height: 44px; place-items: center; border: 1px solid var(--border); border-radius: 8px; background: var(--panel); color: var(--text); }

.badge, .status-chip { display: inline-flex; max-width: 100%; align-items: center; gap: 5px; padding: 3px 8px; border-radius: 999px; font-size: 12px; font-weight: 650; white-space: nowrap; }
.badge.neutral, .status-chip.neutral { background: var(--panel-muted); color: var(--muted); }
.badge.success, .status-chip.success { background: var(--green-soft); color: var(--green); }
.badge.warning, .status-chip.warning { background: var(--amber-soft); color: var(--amber); }
.badge.danger, .status-chip.danger { background: var(--red-soft); color: var(--red); }
.badge.info, .status-chip.info { background: var(--accent-soft); color: var(--accent); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

.table-wrap { max-width: 100%; overflow-x: auto; }
table { width: 100%; min-width: 720px; border-collapse: collapse; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { background: var(--panel-muted); color: var(--muted); font-size: 11px; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: color-mix(in srgb, var(--panel-muted) 65%, transparent); }
td.numeric, th.numeric { text-align: right; font-variant-numeric: tabular-nums; }
.row-actions { display: flex; justify-content: flex-end; gap: 6px; white-space: nowrap; }
.empty { padding: 32px 16px; color: var(--muted); text-align: center; }

.key-reveal { padding: 14px; border: 1px solid var(--amber); border-radius: 8px; background: var(--amber-soft); }
.key-value { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.key-value code { min-width: 0; flex: 1; overflow-wrap: anywhere; }
.callout { padding: 12px 14px; border-left: 3px solid var(--accent); border-radius: 6px; background: var(--accent-soft); color: var(--text); }
.callout.warning { border-color: var(--amber); background: var(--amber-soft); }
.callout.danger { border-color: var(--red); background: var(--red-soft); }
.definition-list { display: grid; grid-template-columns: minmax(110px, .35fr) 1fr; margin: 0; }
.definition-list dt, .definition-list dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--border); }
.definition-list dt { color: var(--muted); }
.definition-list dd { min-width: 0; overflow-wrap: anywhere; }
.code-block { max-width: 100%; overflow-x: auto; padding: 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-muted); color: var(--text); font-size: 12px; white-space: pre; }
.model-list { display: grid; gap: 8px; }
.model-row { display: grid; grid-template-columns: minmax(150px, 1fr) 1fr 1fr; gap: 12px; align-items: center; padding: 12px; border: 1px solid var(--border); border-radius: 8px; }
.model-row strong, .model-row small { display: block; }
.model-row small { color: var(--muted); }

.switch { display: inline-flex; min-height: 44px; align-items: center; gap: 8px; cursor: pointer; }
.switch input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.switch-track { position: relative; width: 38px; height: 22px; border: 1px solid var(--border); border-radius: 999px; background: var(--panel-muted); transition: .15s; }
.switch-track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: var(--muted); transition: .15s; }
.switch input:checked + .switch-track { border-color: var(--green); background: var(--green-soft); }
.switch input:checked + .switch-track::after { left: 19px; background: var(--green); }
.switch input:focus-visible + .switch-track { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px; }

.toast-region { position: fixed; z-index: 80; right: 16px; bottom: 16px; display: grid; width: min(360px, calc(100vw - 32px)); gap: 8px; pointer-events: none; }
.toast { padding: 12px 14px; border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow); color: var(--text); pointer-events: auto; }
.toast.error { border-left-color: var(--red); }
.toast.success { border-left-color: var(--green); }

.announcement-dialog { width: min(560px, calc(100vw - 32px)); max-height: min(680px, calc(100vh - 32px)); padding: 0; border: 1px solid var(--border); border-radius: 12px; background: var(--panel); color: var(--text); box-shadow: var(--shadow); }
.announcement-dialog::backdrop { background: rgb(15 23 30 / 55%); }
.announcement-dialog article { display: flex; max-height: inherit; flex-direction: column; }
.announcement-dialog header { padding: 20px 20px 12px; }
.announcement-dialog h2 { margin: 4px 0 0; font-size: 19px; }
.eyebrow { color: var(--accent); font-size: 11px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.announcement-body { min-height: 80px; overflow-y: auto; padding: 4px 20px 20px; white-space: pre-wrap; overflow-wrap: anywhere; }
.announcement-dialog footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 20px; border-top: 1px solid var(--border); color: var(--muted); }

.loading-bar { position: fixed; z-index: 90; top: 0; left: 0; width: 34%; height: 3px; background: var(--accent); animation: loading 1.1s ease-in-out infinite; }
@keyframes loading { from { transform: translateX(-100%); } to { transform: translateX(400%); } }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
.muted { color: var(--muted); }
.danger-text { color: var(--red); }
.success-text { color: var(--green); }
.nowrap { white-space: nowrap; }
.icon-button.menu-button { display: none; }

@media (max-width: 1100px) {
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .model-row { grid-template-columns: 1fr 1fr; }
  .model-row > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); box-shadow: var(--shadow); }
  .shell.sidebar-open .sidebar { transform: none; }
  .shell.sidebar-open::after { content: ""; position: fixed; z-index: 25; inset: 0; background: rgb(15 23 30 / 40%); }
  .workspace { margin-left: 0; }
  .icon-button.menu-button { display: inline-grid; }
  .topbar { padding-inline: 16px; }
  .main { padding: 16px; }
}

@media (max-width: 700px) {
  .two-column, .form-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .page-header { align-items: stretch; flex-direction: column; }
  .page-header > .button { align-self: flex-start; }
}

@media (max-width: 600px) {
  body { overflow-x: hidden; }
  .auth-screen { padding: 12px; }
  .auth-card { padding: 18px; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topbar { gap: 8px; }
  .top-actions .user-label { display: none; }
  .main { padding: 12px; }
  .card-header, .card-body { padding: 14px; }
  .inline-form { align-items: stretch; flex-direction: column; }
  .form-actions { align-items: stretch; flex-direction: column; }
  .form-actions .button { width: 100%; }
  .definition-list { grid-template-columns: 1fr; }
  .definition-list dt { padding-bottom: 2px; border-bottom: 0; }
  .definition-list dd { padding-top: 2px; }
  .model-row { grid-template-columns: 1fr; }
  .model-row > :first-child { grid-column: auto; }
  .announcement-dialog footer { align-items: stretch; flex-direction: column; }
  .announcement-dialog footer .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}