:root {
  color-scheme: dark;
  --bg: #06111b;
  --bg-soft: #0a1926;
  --panel: rgba(13, 31, 45, .88);
  --panel-solid: #0d1f2d;
  --line: rgba(139, 177, 197, .17);
  --line-strong: rgba(139, 177, 197, .34);
  --text: #e8f2f6;
  --muted: #8da7b5;
  --cyan: #30d8ce;
  --cyan-soft: rgba(48, 216, 206, .12);
  --blue: #56a8ff;
  --amber: #f6b94d;
  --red: #ff6b75;
  --green: #5ed693;
  --violet: #a98bff;
  --shadow: 0 1.5rem 4rem rgba(0, 0, 0, .28);
  --radius: .9rem;
  --sidebar: 14.5rem;
  --topbar: 4.25rem;
  font: 400 100%/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #edf3f5;
  --bg-soft: #f8fbfc;
  --panel: rgba(255, 255, 255, .93);
  --panel-solid: #fff;
  --line: rgba(17, 51, 67, .12);
  --line-strong: rgba(17, 51, 67, .25);
  --text: #102a38;
  --muted: #5b7480;
  --cyan: #087f7a;
  --cyan-soft: rgba(8, 127, 122, .1);
  --blue: #176dc1;
  --shadow: 0 1rem 3rem rgba(29, 55, 69, .11);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body { min-height: 100vh; margin: 0; color: var(--text); background: radial-gradient(circle at 70% -20%, rgba(32, 128, 143, .17), transparent 34rem), var(--bg); }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--text); }
:focus-visible { outline: .15rem solid var(--cyan); outline-offset: .15rem; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: .35rem; font-size: clamp(1.65rem, 3vw, 2.35rem); line-height: 1.15; letter-spacing: -.035em; }
h2 { font-size: 1rem; letter-spacing: -.01em; }
h3 { font-size: .92rem; }
small, .muted { color: var(--muted); }

.wordmark { display: inline-flex; align-items: center; gap: .65rem; color: var(--text); font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.brand-mark { display: grid; width: 2.1rem; aspect-ratio: 1; place-items: center; color: #032a2a; background: linear-gradient(145deg, #79fff3, #2fc8d4); border-radius: .55rem .55rem .55rem .12rem; box-shadow: 0 0 2rem rgba(48, 216, 206, .25); }
.wordmark.compact { letter-spacing: .07em; text-transform: none; }

.login-body { display: grid; place-items: center; padding: clamp(1rem, 5vw, 5rem); }
.login-shell { display: grid; width: min(74rem, 100%); min-height: min(45rem, calc(100vh - 4rem)); grid-template-columns: minmax(0, 1.35fr) minmax(20rem, .65fr); overflow: hidden; background: var(--panel); border: 1px solid var(--line); border-radius: 1.4rem; box-shadow: var(--shadow); }
.login-brand { position: relative; padding: clamp(2rem, 5vw, 5rem); overflow: hidden; background: linear-gradient(145deg, rgba(18, 57, 73, .7), rgba(5, 20, 32, .8)); }
.login-brand::after { position: absolute; inset: 0; pointer-events: none; content: ""; opacity: .14; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 2.5rem 2.5rem; mask-image: radial-gradient(circle at 55% 70%, black, transparent 68%); }
.login-brand h1 { position: relative; z-index: 1; max-width: 10em; margin-top: 4rem; font-size: clamp(2.5rem, 5vw, 4.7rem); }
.login-brand > p { position: relative; z-index: 1; max-width: 35rem; color: #a8bdc8; font-size: 1.05rem; }
.login-topology { position: relative; z-index: 1; width: 100%; height: 15rem; }
.truth-legend { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: .5rem; }
.login-panel { display: flex; flex-direction: column; justify-content: center; padding: clamp(2rem, 4vw, 4rem); background: color-mix(in srgb, var(--panel-solid) 96%, transparent); }
.login-panel h2 { margin: 1.8rem 0 .35rem; font-size: 2rem; }
.login-panel label { display: block; margin: .9rem 0 .35rem; color: var(--muted); font-size: .8rem; font-weight: 700; }
.login-panel input { width: 100%; }
.login-panel footer { margin-top: 1.5rem; color: var(--muted); font-size: .72rem; }
.password-row { display: flex; gap: .4rem; }
.divider { display: flex; align-items: center; gap: .8rem; margin: 1.3rem 0 .2rem; color: var(--muted); font-size: .7rem; text-transform: uppercase; }
.divider::before, .divider::after { flex: 1; height: 1px; content: ""; background: var(--line); }

input, select, textarea { min-width: 0; padding: .72rem .8rem; color: var(--text); background: var(--bg-soft); border: 1px solid var(--line-strong); border-radius: .55rem; }
textarea { min-height: 7rem; resize: vertical; }
.button, .icon-button, .user-menu, .segmented button { display: inline-flex; align-items: center; justify-content: center; gap: .45rem; min-height: 2.35rem; padding: .55rem .85rem; color: var(--text); cursor: pointer; background: transparent; border: 1px solid var(--line-strong); border-radius: .55rem; font-weight: 700; font-size: .78rem; }
.button:hover, .icon-button:hover, .user-menu:hover { background: var(--cyan-soft); border-color: var(--cyan); }
.button.primary { color: #022d2c; background: var(--cyan); border-color: var(--cyan); }
.button.secondary { color: var(--text); background: var(--bg-soft); }
.button.danger { color: #fff; background: #b93643; border-color: #dc5965; }
.button.wide { width: 100%; margin-top: .8rem; }
.button:disabled { opacity: .44; cursor: not-allowed; }
.icon-button { padding-inline: .7rem; }

.app-shell { min-height: 100vh; padding: var(--topbar) 0 2.2rem var(--sidebar); }
.topbar { position: fixed; z-index: 20; top: 0; right: 0; left: 0; display: grid; height: var(--topbar); grid-template-columns: var(--sidebar) minmax(14rem, 1fr) auto; align-items: center; gap: 1rem; padding: 0 1.3rem; background: color-mix(in srgb, var(--bg) 86%, transparent); border-bottom: 1px solid var(--line); backdrop-filter: blur(1rem); }
.global-search { display: flex; max-width: 48rem; align-items: center; gap: .6rem; justify-self: center; width: 100%; padding: .2rem .6rem; background: var(--bg-soft); border: 1px solid var(--line); border-radius: .65rem; }
.global-search input { flex: 1; padding: .45rem 0; background: transparent; border: 0; outline: none; }
kbd { padding: .15rem .35rem; color: var(--muted); background: var(--panel-solid); border: 1px solid var(--line); border-radius: .3rem; font-size: .67rem; }
.top-actions { display: flex; align-items: center; gap: .6rem; }
.system-state { color: var(--muted); font-size: .72rem; }
.user-menu span { display: grid; width: 1.7rem; aspect-ratio: 1; place-items: center; color: #032a2a; background: var(--cyan); border-radius: 50%; font-size: .65rem; }
.mobile-menu { display: none; }
.sidebar { position: fixed; z-index: 15; top: var(--topbar); bottom: 0; left: 0; display: flex; width: var(--sidebar); flex-direction: column; padding: 1rem .8rem 3.2rem; overflow-y: auto; background: color-mix(in srgb, var(--bg-soft) 94%, transparent); border-right: 1px solid var(--line); }
.sidebar nav { display: grid; gap: .18rem; }
.nav-item { display: flex; align-items: center; gap: .7rem; padding: .58rem .7rem; color: var(--muted); border: 1px solid transparent; border-radius: .55rem; font-size: .78rem; font-weight: 650; }
.nav-item:hover, .nav-item.active { color: var(--text); background: var(--cyan-soft); border-color: color-mix(in srgb, var(--cyan) 24%, transparent); }
.nav-icon { width: 1.1rem; color: var(--cyan); text-align: center; }
.sidebar-card { margin-top: auto; padding: 1rem; background: linear-gradient(145deg, rgba(48, 216, 206, .14), rgba(71, 107, 183, .08)); border: 1px solid var(--line); border-radius: .7rem; }
.sidebar-card strong { color: var(--cyan); font-size: .82rem; line-height: 1.35; letter-spacing: .08em; }
.sidebar-card p { margin: .6rem 0 0; color: var(--muted); font-size: .68rem; }
.main { width: min(100%, 104rem); margin: 0 auto; padding: clamp(1rem, 2.8vw, 2.6rem); }
.page-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; }
.page-header > div:first-child { max-width: 50rem; }
.page-header p:not(.eyebrow) { margin-bottom: 0; color: var(--muted); font-size: .88rem; }
.eyebrow { margin: 0 0 .5rem; color: var(--cyan); font-size: .68rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.page-actions { display: flex; flex-wrap: wrap; gap: .5rem; }

.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .85rem; margin-bottom: .85rem; }
.metric-card, .panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 .5rem 1.7rem rgba(0, 0, 0, .08); }
.metric-card { padding: 1rem 1.05rem; }
.metric-card strong { display: block; margin: .45rem 0 .15rem; font-size: 1.8rem; line-height: 1; letter-spacing: -.04em; }
.metric-top, .panel-heading { display: flex; align-items: center; justify-content: space-between; gap: .7rem; }
.metric-top > span:first-child { color: var(--muted); font-size: .72rem; font-weight: 750; text-transform: uppercase; }
.panel { min-width: 0; padding: 1rem; }
.panel-heading { margin-bottom: .8rem; }
.panel-heading h2 { margin: 0; }
.dashboard-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .85rem; margin-bottom: .85rem; }
.span-2 { grid-column: span 2; }
.workspace { display: grid; grid-template-columns: minmax(12rem, .65fr) minmax(24rem, 2.4fr) minmax(14rem, .8fr); gap: .85rem; }
.topology-canvas, .chart-canvas { display: block; width: 100%; min-height: 14rem; border-radius: .6rem; background: radial-gradient(circle at center, rgba(26, 118, 128, .15), transparent 68%), var(--bg-soft); }
.topology-canvas.large { min-height: 34rem; }
.tree details { margin: .4rem 0; border-left: 1px solid var(--line-strong); }
.tree summary { padding: .4rem .5rem; cursor: pointer; color: var(--text); font-size: .76rem; }
.tree summary span { float: right; color: var(--muted); }
.tree a { display: block; margin-left: .75rem; padding: .3rem .5rem; color: var(--muted); font-size: .7rem; }
.segmented { display: flex; padding: .15rem; overflow: auto; background: var(--bg-soft); border-radius: .55rem; }
.segmented button { min-height: auto; padding: .32rem .55rem; border: 0; color: var(--muted); font-size: .65rem; }
.segmented button.active { color: var(--text); background: var(--panel-solid); }
.table-scroll { overflow: auto; max-height: 38rem; }
table { width: 100%; border-collapse: collapse; font-size: .74rem; }
th { position: sticky; z-index: 1; top: 0; padding: .6rem .7rem; color: var(--muted); background: var(--panel-solid); text-align: left; text-transform: uppercase; letter-spacing: .05em; font-size: .64rem; }
td { padding: .68rem .7rem; border-top: 1px solid var(--line); vertical-align: middle; }
tbody tr:hover { background: var(--cyan-soft); }
.truth, .status-pill { display: inline-flex; align-items: center; padding: .16rem .42rem; border: 1px solid var(--line-strong); border-radius: 99rem; white-space: nowrap; font-size: .58rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.truth.observed { color: var(--cyan); background: var(--cyan-soft); }
.truth.simulated, .status-pill.simulated { color: var(--violet); background: rgba(169, 139, 255, .1); }
.truth.derived { color: var(--blue); background: rgba(86, 168, 255, .1); }
.status-pill.healthy, .status-pill.completed, .status-pill.active, .status-pill.pass, .status-pill.cleared, .status-pill.in-sync { color: var(--green); background: rgba(94, 214, 147, .1); }
.status-pill.critical, .status-pill.failed, .status-pill.uncertain, .status-pill.open { color: var(--red); background: rgba(255, 107, 117, .1); }
.status-pill.warning, .status-pill.major, .status-pill.degraded, .status-pill.awaiting-approval, .status-pill.partial { color: var(--amber); background: rgba(246, 185, 77, .1); }
.status-pill.running, .status-pill.executing, .status-pill.deploying, .status-pill.verifying { color: var(--blue); background: rgba(86, 168, 255, .1); }
.status-dot { display: inline-block; width: .48rem; aspect-ratio: 1; margin-right: .25rem; background: var(--muted); border-radius: 50%; box-shadow: 0 0 .7rem currentColor; }
.status-dot.healthy { color: var(--green); background: var(--green); }
.freshness { color: var(--muted); font-size: .65rem; }
.progress { display: flex; align-items: center; gap: .4rem; min-width: 6rem; }
.progress i { position: relative; width: 4rem; height: .25rem; overflow: hidden; background: var(--line); border-radius: 1rem; }
.progress i::after { position: absolute; inset: 0; width: var(--progress); content: ""; background: var(--cyan); }
.progress b { font-size: .65rem; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .9rem; }
.form-field { display: grid; gap: .3rem; }
.form-field label { color: var(--muted); font-size: .72rem; font-weight: 700; }
.form-field.full { grid-column: 1 / -1; }
.form-actions { display: flex; gap: .55rem; justify-content: flex-end; grid-column: 1 / -1; }
.callout { padding: .75rem .85rem; color: var(--text); background: var(--bg-soft); border: 1px solid var(--line); border-left: .22rem solid var(--blue); border-radius: .5rem; font-size: .76rem; }
.callout.warning { border-left-color: var(--amber); }
.callout.critical { border-left-color: var(--red); }
.callout.compact { margin-top: 1rem; padding: .55rem .7rem; }
.form-error { min-height: 1.3rem; margin-top: .5rem; color: var(--red); font-size: .72rem; }
.assistant-mini { display: flex; gap: .4rem; }
.assistant-mini input { flex: 1; }
.timeline { display: grid; gap: .4rem; margin: .6rem 0; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 5.5rem 1fr; gap: .7rem; padding: .5rem 0; border-bottom: 1px solid var(--line); font-size: .72rem; }
.timeline time { color: var(--cyan); font-variant-numeric: tabular-nums; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; }
.scenario-card { padding: 1rem; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.scenario-card ol { padding-left: 1.2rem; color: var(--muted); font-size: .73rem; }
.scenario-card li.complete { color: var(--green); }
.scenario-card li.running { color: var(--blue); }
.code-block { padding: .8rem; overflow: auto; color: #bcece7; background: #041019; border: 1px solid var(--line); border-radius: .5rem; font: .7rem/1.55 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; }
.toast-region { position: fixed; z-index: 50; right: 1rem; bottom: 2.8rem; display: grid; width: min(23rem, calc(100vw - 2rem)); gap: .5rem; }
.toast { padding: .8rem 1rem; background: var(--panel-solid); border: 1px solid var(--line-strong); border-left: .22rem solid var(--cyan); border-radius: .6rem; box-shadow: var(--shadow); font-size: .76rem; animation: toast-in .2s ease-out; }
.toast.error { border-left-color: var(--red); }
.modal-backdrop { position: fixed; z-index: 45; inset: 0; display: grid; place-items: center; padding: 1rem; background: rgba(0, 7, 13, .72); backdrop-filter: blur(.35rem); }
.modal { width: min(39rem, 100%); max-height: 90vh; padding: 1.2rem; overflow: auto; background: var(--panel-solid); border: 1px solid var(--line-strong); border-radius: 1rem; box-shadow: var(--shadow); }
.statusbar { position: fixed; z-index: 18; right: 0; bottom: 0; left: var(--sidebar); display: flex; min-height: 2.2rem; align-items: center; justify-content: space-between; padding: .35rem 1.1rem; color: var(--muted); background: color-mix(in srgb, var(--bg) 92%, transparent); border-top: 1px solid var(--line); backdrop-filter: blur(.7rem); font-size: .64rem; }
@keyframes toast-in { from { opacity: 0; transform: translateY(.5rem); } }

@media (max-width: 78rem) {
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .workspace { grid-template-columns: 1fr 2fr; }
  .workspace > :last-child { grid-column: 1 / -1; }
  .system-state { display: none; }
}

@media (max-width: 58rem) {
  :root { --sidebar: 0rem; }
  .app-shell { padding-left: 0; }
  .topbar { grid-template-columns: auto 1fr auto; }
  .topbar > .wordmark { display: none; }
  .mobile-menu { display: inline-flex; }
  .sidebar { width: 14.5rem; transform: translateX(-105%); transition: transform .2s ease; box-shadow: var(--shadow); }
  body.menu-open .sidebar { transform: translateX(0); }
  .statusbar { left: 0; }
  .workspace, .dashboard-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
}

@media (max-width: 43rem) {
  .login-body { display: block; padding: 0; }
  .login-shell { min-height: 100vh; grid-template-columns: 1fr; border: 0; border-radius: 0; }
  .login-brand { min-height: 18rem; padding: 1.5rem; }
  .login-brand h1 { margin-top: 2rem; font-size: 2.2rem; }
  .login-brand > p, .login-topology, .truth-legend { display: none; }
  .login-panel { padding: 1.5rem; }
  .global-search { display: none; }
  .topbar { grid-template-columns: auto 1fr; }
  .top-actions { justify-self: end; }
  .user-menu b { display: none; }
  .main { padding: 1rem; }
  .page-header { align-items: flex-start; flex-direction: column; }
  .metric-grid, .card-grid, .form-grid { grid-template-columns: 1fr; }
  .form-field.full, .form-actions { grid-column: auto; }
  .statusbar span:first-child { display: none; }
  .statusbar { justify-content: flex-end; }
}

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