:root {
  --bg: #0c0b1d;
  --surface: rgba(25, 23, 50, 0.88);
  --surface-strong: #211d41;
  --border: rgba(196, 190, 255, 0.14);
  --text: #f7f5ff;
  --muted: #aaa4c8;
  --purple: #8f7cff;
  --purple-strong: #725cff;
  --yellow: #ffc733;
  --green: #65f48c;
  --red: #ff708b;
  --shadow: 0 24px 80px rgba(3, 3, 12, 0.42);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 10% 0%, #2f285d 0, transparent 33%), var(--bg); }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 28px; position: relative; overflow: hidden; }
.login-shell::before, .login-shell::after { content: ""; position: absolute; border-radius: 999px; filter: blur(8px); opacity: .5; }
.login-shell::before { width: 360px; height: 360px; background: #4d3bc6; left: -140px; top: -140px; }
.login-shell::after { width: 300px; height: 300px; background: #eb9f28; right: -180px; bottom: -160px; opacity: .25; }
.login-card { width: min(100%, 430px); padding: 42px; border: 1px solid var(--border); border-radius: 28px; background: rgba(18, 16, 39, .92); box-shadow: var(--shadow); backdrop-filter: blur(20px); position: relative; z-index: 1; }
.logo-frame { width: 54px; height: 54px; border-radius: 16px; overflow: hidden; border: 1px solid rgba(255,255,255,.15); box-shadow: 0 10px 30px rgba(0,0,0,.22); flex: 0 0 auto; }
.logo-frame--large { width: 92px; height: 92px; border-radius: 24px; margin-bottom: 24px; }
.logo-frame img { width: 100%; height: 100%; display: block; object-fit: cover; }
.eyebrow { margin: 0 0 7px; color: #b7adff; font-size: 11px; line-height: 1.2; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
h1, h2 { margin: 0; letter-spacing: -.035em; }
.login-card h1 { font-size: 34px; }
.login-copy { margin: 12px 0 28px; color: var(--muted); line-height: 1.6; }

.stack-form { display: grid; gap: 17px; }
.stack-form label { display: grid; gap: 8px; color: #d7d2ed; font-size: 13px; font-weight: 700; }
input, textarea, select { width: 100%; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; color: var(--text); background: #111027; outline: none; transition: border-color .18s, box-shadow .18s; }
textarea { resize: vertical; min-height: 176px; font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 13px; line-height: 1.55; }
input:focus, textarea:focus, select:focus { border-color: var(--purple); box-shadow: 0 0 0 3px rgba(143,124,255,.18); }
.button { min-height: 42px; padding: 10px 16px; border-radius: 12px; border: 1px solid transparent; color: var(--text); background: transparent; font-weight: 800; }
.button--primary { background: linear-gradient(135deg, var(--purple), var(--purple-strong)); box-shadow: 0 12px 28px rgba(91,67,217,.25); }
.button--primary:hover { filter: brightness(1.08); }
.button--ghost { border-color: var(--border); background: rgba(255,255,255,.035); }
.button--ghost:hover { border-color: rgba(196,190,255,.35); background: rgba(255,255,255,.07); }
.form-error { min-height: 18px; margin: -4px 0 0; color: var(--red); font-size: 13px; }
.form-result { min-height: 20px; margin: 0; color: var(--muted); font-size: 13px; }
.form-result.success { color: var(--green); }
.form-result.error { color: var(--red); }

.app-shell { min-height: 100vh; padding: 24px clamp(18px, 3vw, 46px) 42px; }
.topbar { max-width: 1680px; margin: 0 auto 22px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand h1 { font-size: 23px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.status-badge { display: inline-flex; align-items: center; gap: 9px; border: 1px solid var(--border); border-radius: 999px; padding: 9px 13px; color: var(--muted); background: rgba(255,255,255,.035); font-size: 12px; font-weight: 800; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--red); box-shadow: 0 0 0 4px rgba(255,112,139,.12); }
.status-badge--online { color: #c9ffd5; }
.status-badge--online .status-dot { background: var(--green); box-shadow: 0 0 0 4px rgba(101,244,140,.12); }

.metrics { max-width: 1680px; margin: 0 auto 18px; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
.metric-card { grid-column: span 1; min-height: 98px; padding: 20px; border: 1px solid var(--border); border-radius: 18px; background: rgba(22,20,45,.78); box-shadow: 0 14px 36px rgba(0,0,0,.14); }
.metric-card--wide { grid-column: span 2; }
.metric-card span { display: block; margin-bottom: 13px; color: var(--muted); font-size: 12px; font-weight: 700; }
.metric-card strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 22px; }

.workspace { max-width: 1680px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 390px; gap: 18px; align-items: start; }
.panel { border: 1px solid var(--border); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); overflow: hidden; backdrop-filter: blur(18px); }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 22px 24px; border-bottom: 1px solid var(--border); }
.panel-heading h2 { font-size: 20px; }
.live-mark { display: inline-flex; align-items: center; gap: 8px; color: #c9ffd5; font-size: 11px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.live-mark span { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 1.8s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(101,244,140,0); } 0%,100% { box-shadow: 0 0 0 0 rgba(101,244,140,.35); } }
.traffic-toolbar { display: grid; grid-template-columns: minmax(200px, 1fr) auto auto auto; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.018); }
.search-field input { padding: 10px 13px; }
.toggle-control, .retain-control { display: flex !important; grid-auto-flow: column; align-items: center; justify-content: start; gap: 8px !important; white-space: nowrap; color: var(--muted) !important; font-size: 12px !important; }
.toggle-control input, .retain-control input { width: 16px; height: 16px; accent-color: var(--purple); }
.traffic-columns { display: grid; grid-template-columns: 86px minmax(180px, .8fr) 50px minmax(280px, 1.6fr); gap: 14px; padding: 10px 18px; color: #77718f; border-bottom: 1px solid var(--border); font-size: 10px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.message-list { height: min(62vh, 730px); min-height: 430px; overflow: auto; overscroll-behavior: contain; }
.message-row { display: grid; grid-template-columns: 86px minmax(180px, .8fr) 50px minmax(280px, 1.6fr); gap: 14px; align-items: start; padding: 14px 18px; border-bottom: 1px solid rgba(196,190,255,.075); transition: background .15s; }
.message-row:hover { background: rgba(143,124,255,.055); }
.message-time { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 12px; }
.message-topic { color: #d8d0ff; font-family: "SFMono-Regular", Consolas, monospace; font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.message-qos { width: fit-content; min-width: 26px; padding: 4px 7px; border-radius: 7px; background: rgba(255,199,51,.12); color: #ffdc79; text-align: center; font-size: 11px; font-weight: 900; }
.message-payload { margin: 0; color: #ddd9ed; font-family: "SFMono-Regular", Consolas, monospace; font-size: 11px; line-height: 1.55; white-space: pre-wrap; overflow-wrap: anywhere; }
.message-meta { display: block; margin-top: 5px; color: #716c89; font-size: 10px; }
.empty-state { height: 100%; min-height: 430px; display: grid; place-content: center; justify-items: center; gap: 8px; color: var(--muted); text-align: center; }
.empty-state strong { color: #ddd8f4; }
.publish-panel { position: sticky; top: 18px; }
.publish-panel .stack-form { padding: 22px; }
.form-row { display: grid; grid-template-columns: 1fr; gap: 16px; }
.publish-actions { display: flex; justify-content: flex-end; gap: 10px; }
.toast { position: fixed; right: 22px; bottom: 22px; max-width: min(420px, calc(100vw - 44px)); padding: 13px 16px; border: 1px solid var(--border); border-radius: 12px; background: #272247; color: var(--text); box-shadow: var(--shadow); transform: translateY(18px); opacity: 0; pointer-events: none; transition: .2s; }
.toast.visible { transform: translateY(0); opacity: 1; }

@media (max-width: 1050px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric-card, .metric-card--wide { grid-column: span 1; }
  .workspace { grid-template-columns: 1fr; }
  .publish-panel { position: static; }
}
@media (max-width: 720px) {
  .app-shell { padding-inline: 12px; }
  .topbar { align-items: flex-start; }
  .topbar-actions { flex-direction: column; align-items: flex-end; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metric-card--wide { grid-column: span 2; }
  .traffic-toolbar { grid-template-columns: 1fr 1fr; }
  .search-field { grid-column: span 2; }
  .traffic-columns { display: none; }
  .message-row { grid-template-columns: 1fr auto; gap: 7px 12px; }
  .message-time { order: 1; }
  .message-qos { order: 2; }
  .message-topic { order: 3; grid-column: span 2; }
  .message-payload-wrap { order: 4; grid-column: span 2; }
  .login-card { padding: 30px 24px; }
}