:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1f2630;
  --text: #e6edf3;
  --muted: #9aa7b4;
  --accent: #38bdf8;
  --good: #2dd4bf;
  --warn: #fbbf24;
  --bad: #fb7185;
  --border: #30363d;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: radial-gradient(circle at top left, #102033, var(--bg));
  color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
.container { width: min(1120px, 92vw); margin: 0 auto; padding: 28px 0; }
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.card { background: rgba(22, 27, 34, 0.94); border: 1px solid var(--border); border-radius: 20px; padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.login-card { width: min(440px, 100%); }
h1, h2, h3 { margin-top: 0; }
.muted { color: var(--muted); }
label { display: block; margin: 14px 0 7px; color: var(--muted); }
input, select { width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: #0b1220; color: var(--text); }
button { border: 0; border-radius: 12px; background: var(--accent); color: #00121c; padding: 12px 16px; font-weight: 700; cursor: pointer; }
button.secondary { background: var(--panel2); color: var(--text); border: 1px solid var(--border); }
.error { color: var(--bad); min-height: 20px; }
.topbar { border-bottom: 1px solid var(--border); background: rgba(13,17,23,.88); position: sticky; top: 0; backdrop-filter: blur(8px); }
.nav { display: flex; align-items: center; gap: 18px; padding: 14px 0; }
.nav .brand { font-weight: 800; margin-right: auto; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.kpi { font-size: 32px; font-weight: 800; margin: 8px 0; }
.badge { display: inline-block; padding: 6px 10px; border-radius: 999px; background: var(--panel2); color: var(--muted); border: 1px solid var(--border); font-size: 13px; }
.badge.good { color: var(--good); }
.badge.warn { color: var(--warn); }
.badge.bad { color: var(--bad); }
.action { font-size: 28px; font-weight: 900; color: var(--good); }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { border-bottom: 1px solid var(--border); padding: 12px; text-align: left; }
.table th { color: var(--muted); font-weight: 600; }
@media (max-width: 800px) { .grid, .grid2 { grid-template-columns: 1fr; } .nav { flex-wrap: wrap; } }
.good { color: var(--good); }
.warn { color: var(--warn); }
.danger, .bad { color: var(--bad); }
.table input { padding: 8px 10px; }

/* V0.8 Beginner UX */
.explain-box { background: rgba(31, 38, 48, 0.72); border: 1px solid var(--border); border-radius: 18px; padding: 18px; margin: 14px 0; }
.explain-box h3 { margin: 0 0 8px; font-size: 18px; }
.final-action { display: inline-block; padding: 10px 14px; border-radius: 14px; font-weight: 900; letter-spacing: .3px; }
.final-action.green { background: rgba(45,212,191,.12); color: var(--good); border: 1px solid rgba(45,212,191,.35); }
.final-action.yellow { background: rgba(251,191,36,.12); color: var(--warn); border: 1px solid rgba(251,191,36,.35); }
.final-action.red { background: rgba(251,113,133,.12); color: var(--bad); border: 1px solid rgba(251,113,133,.35); }
.final-action.gray { background: rgba(154,167,180,.10); color: var(--muted); border: 1px solid var(--border); }
.steps { counter-reset: step; padding-left: 0; }
.steps li { list-style: none; margin: 10px 0; padding-left: 38px; position: relative; }
.steps li:before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: -2px; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--panel2); border: 1px solid var(--border); color: var(--accent); font-weight: 800; }
.simple-list { margin: 0; padding-left: 18px; }
.simple-list li { margin: 8px 0; }
.help-small { font-size: 14px; color: var(--muted); }


/* V0.8A Visual signals and charts */
.traffic-light { width: 36px; padding: 5px; border-radius: 18px; background: #0b1220; border: 1px solid var(--border); display: grid; gap: 4px; justify-items: center; }
.tl { width: 14px; height: 14px; border-radius: 50%; opacity: .18; box-shadow: inset 0 0 0 1px rgba(255,255,255,.12); }
.tl.red { background: var(--bad); }
.tl.yellow { background: var(--warn); }
.tl.green { background: var(--good); }
.tl.blue { background: var(--accent); }
.tl.on { opacity: 1; box-shadow: 0 0 12px currentColor, inset 0 0 0 1px rgba(255,255,255,.35); }
.sparkline { width: 150px; height: 44px; display: block; background: rgba(31,38,48,.42); border: 1px solid var(--border); border-radius: 10px; }
.sparkline path { fill: none; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.sparkline.spark-up path { stroke: var(--good); }
.sparkline.spark-down path { stroke: var(--bad); }
.chart-box { width: 100%; min-height: 340px; display: grid; place-items: center; overflow-x: auto; }
.main-chart { width: 100%; max-width: 920px; min-width: 620px; background: rgba(11,18,32,.55); border: 1px solid var(--border); border-radius: 18px; padding: 10px; }
.main-chart path { fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.main-chart.chart-up path { stroke: var(--good); }
.main-chart.chart-down path { stroke: var(--bad); }
.chart-grid { stroke: rgba(154,167,180,.18); stroke-width: 1; }
.chart-label { fill: var(--muted); font-size: 14px; }
.mini-card { padding: 16px; box-shadow: none; }

/* V0.8B visual refinements */
.signal-status-row { display: flex; align-items: center; gap: 18px; }
.traffic-large { transform: scale(1.25); transform-origin: left center; margin-right: 8px; }
.small-chart-box { min-height: 230px; }
.main-chart .chart-secondary, .chart-secondary { stroke: rgba(154,167,180,.55) !important; stroke-dasharray: 7 6; }
.button-link { display: inline-block; margin-left: 10px; border-radius: 12px; padding: 11px 14px; background: var(--panel2); border: 1px solid var(--border); color: var(--text); font-weight: 700; }
.small-btn { margin-top: 8px; padding: 8px 10px; font-size: 13px; }
@media (max-width: 800px) { .signal-status-row { align-items: flex-start; } .traffic-large { transform: none; } }

/* V0.9 Email OTP 2FA */
.status-box { border: 1px solid var(--border); border-radius: 16px; padding: 14px 16px; margin: 12px 0 16px; background: rgba(31,38,48,.72); }
.status-box.info { border-color: rgba(56,189,248,.35); }
.status-box.success { border-color: rgba(45,212,191,.35); }
.status-box.warning { border-color: rgba(251,191,36,.45); color: var(--warn); }
button.ghost { background: transparent; color: var(--muted); border: 1px solid transparent; }
.login-card form button { margin-top: 12px; margin-right: 8px; }