:root {
  color-scheme: dark;
  --bg: #050a14;
  --surface: #0b1322;
  --surface-2: #101b2e;
  --border: #1b2940;
  --border-strong: #30405b;
  --text: #f4f7fb;
  --muted: #8795aa;
  --accent: #21e2d0;
  --accent-dark: #0a8279;
  --violet: #c95cff;
  --danger: #ff6475;
  --warning: #f9c74f;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  --sans: Inter, ui-sans-serif, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body { min-height: 100vh; margin: 0; overflow-x: hidden; color: var(--text); background: var(--bg); font-family: var(--sans); }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

.grid-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.027) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.027) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, #000 5%, transparent 90%);
}

.login-screen { position: relative; z-index: 1; min-height: 100vh; display: grid; grid-template-columns: minmax(0, 450px); place-content: center; padding: 28px; }
.login-card { width: 100%; max-width: 450px; min-width: 0; padding: 44px; background: rgba(7,14,26,.96); border: 1px solid var(--border); box-shadow: 0 30px 100px rgba(0,0,0,.55); }
.login-card::before { content: ""; display: block; height: 3px; margin: -44px -44px 40px; background: linear-gradient(90deg, var(--violet), var(--accent)); }
.login-card h1 { margin: 10px 0; font-size: 2rem; letter-spacing: -.04em; }
.login-card .muted { margin-bottom: 28px; }

.brand { min-width: 0; display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; }
.brand img { width: 42px; height: 42px; }
.brand strong { display: block; font-size: 1.35rem; letter-spacing: -.05em; }
.brand strong span, h1 span { color: var(--accent); }
.brand small { display: block; margin-top: 4px; color: var(--muted); font: .57rem var(--mono); letter-spacing: .25em; }
.brand-large { margin-bottom: 44px; }
.brand-large img { width: 54px; height: 54px; }
.brand-large strong { font-size: 1.6rem; }

.stack { display: grid; gap: 18px; }
label { display: grid; gap: 8px; color: #cbd5e3; font: .72rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }
input, select {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  color: var(--text);
  background: #080f1d;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  outline: none;
  text-transform: none;
  letter-spacing: normal;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(33,226,208,.12); }
select { cursor: pointer; }

.button {
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  color: var(--text);
  background: var(--surface-2);
  cursor: pointer;
  font: 700 .71rem var(--mono);
  letter-spacing: .08em;
}
.button:hover { border-color: var(--accent); }
.button:disabled { cursor: not-allowed; opacity: .45; }
.button.primary { color: #021311; background: var(--accent); border-color: var(--accent); }
.button.primary:hover { background: #73f5e8; }
.button.primary span { margin-left: 10px; }
.button.secondary { background: transparent; }
.button.danger { color: var(--danger); background: transparent; border-color: rgba(255,100,117,.45); }
.text-button { padding: 6px 0; color: var(--accent); background: none; border: 0; cursor: pointer; font: .68rem var(--mono); letter-spacing: .1em; }
.form-error { min-height: 20px; margin: 16px 0 0; color: var(--danger); font: .75rem var(--mono); }
.muted, .field-help { color: var(--muted); line-height: 1.6; }
.auth-switch { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 8px; color: var(--muted); font-size: .78rem; }
.auth-switch .text-button { flex: 0 0 auto; }
.auth-help { margin: -9px 0 0; color: var(--muted); font: .68rem/1.5 var(--mono); }
.captcha-field { min-width: 0; overflow: hidden; }
.captcha-field > div { min-height: 78px; }
.captcha-field p { margin: 8px 0 0; color: var(--muted); font: .6rem/1.5 var(--mono); }
.captcha-field a { color: var(--accent); }

.app-shell { position: relative; z-index: 1; width: 100%; max-width: 100vw; min-height: 100vh; overflow-x: hidden; display: grid; grid-template-rows: 28px 76px 1fr 38px; }
.instrument-bar { display: flex; align-items: center; justify-content: space-between; padding: 0 28px; color: #718198; border-bottom: 1px solid var(--border); font: .58rem var(--mono); letter-spacing: .28em; }
.site-header { display: grid; grid-template-columns: 260px 1fr auto; align-items: stretch; padding: 0 28px; background: rgba(5,10,20,.94); border-bottom: 1px solid var(--border); }
.site-header .brand { padding-right: 28px; border-right: 1px solid var(--border); }
.site-header nav { display: flex; align-items: stretch; gap: 2px; padding-left: 18px; }
.nav-link { padding: 0 15px; color: var(--muted); background: transparent; border: 0; border-bottom: 2px solid transparent; cursor: pointer; font: .68rem var(--mono); letter-spacing: .12em; }
.nav-link:hover { color: var(--text); background: rgba(255,255,255,.025); }
.nav-link.active { color: var(--accent); border-bottom-color: var(--accent); }
.header-user { display: flex; align-items: center; gap: 10px; color: var(--muted); font: .65rem var(--mono); letter-spacing: .08em; }
.header-user .text-button { margin-left: 8px; color: #aab5c4; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 4px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 12px rgba(33,226,208,.6); }

main { min-width: 0; max-width: 100%; }
.view { display: none; width: 100%; max-width: 1440px; min-width: 0; margin: 0 auto; padding: 46px 42px 56px; }
.view.active-view { display: block; animation: enter .2s ease-out; }
@keyframes enter { from { opacity: 0; transform: translateY(6px); } }
.page-heading { margin-bottom: 30px; }
.page-heading h1 { max-width: 850px; margin: 8px 0 12px; font-size: clamp(2rem, 4vw, 3.55rem); line-height: 1.02; letter-spacing: -.06em; }
.page-heading > p:last-child { max-width: 700px; margin: 0; color: var(--muted); font-size: 1rem; line-height: 1.65; }
.eyebrow { margin: 0; color: var(--accent); font: 700 .66rem var(--mono); letter-spacing: .2em; }

.metrics { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: 22px; border-top: 1px solid var(--border); border-left: 1px solid var(--border); }
.metric { min-width: 0; min-height: 116px; display: grid; align-content: center; gap: 10px; padding: 20px; background: rgba(11,19,34,.84); border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.metric.primary { background: linear-gradient(135deg, rgba(15,61,67,.45), rgba(11,19,34,.85)); }
.metric small, .metric span { color: var(--muted); font: .6rem var(--mono); letter-spacing: .12em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.metric strong { font: 700 1.18rem var(--mono); overflow: hidden; text-overflow: ellipsis; }
.metric.primary strong { color: var(--accent); }
.metric.violet strong { color: var(--violet); }

.workspace-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; }
.panel { background: rgba(11,19,34,.88); border: 1px solid var(--border); }
.panel h2 { margin: 7px 0 12px; font-size: 1.45rem; letter-spacing: -.035em; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.panel-heading h2 { margin-bottom: 0; }
.hero-panel { min-height: 290px; padding: 34px; background: linear-gradient(145deg, rgba(10,33,49,.86), rgba(11,19,34,.92)); }
.hero-panel h2 { max-width: 550px; margin-top: 14px; font-size: 2rem; }
.hero-panel > p:not(.eyebrow) { max-width: 600px; color: var(--muted); line-height: 1.6; }
.hero-panel .button { margin-top: 22px; }
.workspace-grid > .panel:last-child { padding: 28px; }
.compact-list { display: grid; }
.compact-client { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; min-width: 0; padding: 16px 4px; border-bottom: 1px solid var(--border); }
.compact-client:last-child { border-bottom: 0; }
.compact-client strong, .compact-client small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.compact-client small { margin-top: 5px; color: var(--muted); font: .65rem var(--mono); }
.empty-state { padding: 32px 8px; color: var(--muted); text-align: center; font: .72rem var(--mono); line-height: 1.7; }

.split-layout { display: grid; grid-template-columns: minmax(300px, 380px) minmax(0, 1fr); gap: 22px; align-items: start; }
.form-panel { display: grid; gap: 18px; padding: 30px; }
.form-panel h2 { margin: -8px 0 4px; }
.field-help { margin: -9px 0 2px; font-size: .78rem; }
.warning { margin: 0; padding: 14px; color: var(--warning); background: rgba(249,199,79,.07); border: 1px solid rgba(249,199,79,.25); font: .7rem/1.5 var(--mono); }
.list-panel { min-width: 0; padding: 28px; }
.clients-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(285px, 1fr)); gap: 12px; padding-top: 20px; }
.client-card { min-width: 0; padding: 18px; background: var(--surface-2); border: 1px solid var(--border); border-left: 2px solid var(--accent); }
.client-card.offline { border-left-color: var(--danger); }
.client-card-head { display: flex; justify-content: space-between; gap: 12px; }
.client-card strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.client-code { margin: 8px 0 16px; color: var(--accent); font: .74rem var(--mono); letter-spacing: .08em; }
.client-meta { color: var(--muted); font: .63rem var(--mono); }
.client-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.client-actions .button { min-height: 36px; padding: 0 11px; font-size: .62rem; }

.connect-panel { width: min(760px, 100%); margin: 0 auto; padding: 38px; display: grid; grid-template-columns: 180px 1fr; gap: 34px; align-items: center; }
.connection-visual { position: relative; width: 150px; height: 150px; display: grid; place-items: center; }
.connection-visual img { position: relative; width: 76px; height: 76px; z-index: 1; }
.pulse-ring { position: absolute; inset: 0; border: 1px solid var(--accent); border-radius: 50%; box-shadow: inset 0 0 30px rgba(33,226,208,.1), 0 0 30px rgba(33,226,208,.1); animation: pulse 2.6s ease-out infinite; }
@keyframes pulse { 0%,100% { transform: scale(.75); opacity: .35; } 50% { transform: scale(1); opacity: .9; } }
.connect-panel form { min-width: 0; }
.security-note { grid-column: 1 / -1; display: grid; grid-template-columns: auto 1fr; gap: 14px; padding: 16px; border: 1px solid var(--border); border-left: 2px solid var(--accent); color: var(--muted); font: .68rem/1.5 var(--mono); }
.security-note strong { color: var(--accent); }

.settings-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 22px; align-items: start; }
.infrastructure-panel { padding: 30px; }
dl { margin: 20px 0; border-top: 1px solid var(--border); }
dl div { display: grid; grid-template-columns: 180px 1fr; gap: 15px; padding: 16px 0; border-bottom: 1px solid var(--border); }
dt { color: var(--muted); font: .66rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }
dd { min-width: 0; margin: 0; overflow-wrap: anywhere; font: .75rem var(--mono); }

footer { display: flex; align-items: center; justify-content: space-between; padding: 0 28px; color: #66758b; border-top: 1px solid var(--border); font: .59rem var(--mono); letter-spacing: .12em; }
.toast { position: fixed; z-index: 20; right: 24px; bottom: 24px; max-width: min(430px, calc(100vw - 48px)); padding: 16px 18px; color: var(--text); background: #101b2e; border: 1px solid var(--accent); border-left-width: 3px; box-shadow: 0 18px 50px rgba(0,0,0,.5); font: .72rem/1.5 var(--mono); }
.toast.error { border-color: var(--danger); }

@media (max-width: 1020px) {
  .site-header { grid-template-columns: 210px 1fr; }
  .header-user { display: none; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .workspace-grid, .settings-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .app-shell { grid-template-rows: 24px auto 1fr 34px; }
  .instrument-bar { padding: 0 16px; }
  .site-header { display: flex; flex-wrap: wrap; padding: 12px 16px 0; }
  .site-header .brand { width: 100%; padding: 0 0 12px; border: 0; }
  .site-header nav { flex: 0 0 100%; width: 100%; min-width: 0; max-width: 100%; padding: 0; overflow-x: auto; }
  .nav-link { min-height: 44px; padding: 0 12px; white-space: nowrap; }
  .view { padding: 32px 18px 44px; }
  .metrics, .split-layout { grid-template-columns: 1fr; }
  .connect-panel { grid-template-columns: 1fr; padding: 26px; }
  .connection-visual { margin: 0 auto; }
  .security-note { grid-column: auto; grid-template-columns: 1fr; }
  dl div { grid-template-columns: 1fr; gap: 7px; }
  footer span:last-child { display: none; }
  .login-card { padding: 30px; }
  .login-card::before { margin: -30px -30px 28px; }
  .brand-large small { font-size: .5rem; letter-spacing: .18em; }
}