:root {
  /* BizDNAi brand tokens */
  --bg: #1A1A1A;
  --bg-2: #141414;
  --card: rgba(20, 24, 32, 0.72);
  --card-border: rgba(0, 212, 255, 0.18);
  --card-border-strong: rgba(0, 212, 255, 0.35);
  --text: #E5E7EB;
  --muted: #9CA3AF;
  --accent: #00D4FF;
  --accent-2: #D81BFF;
  --accent-deep: #0099cc;
  --ok: #4ade80;
  --warn: #f59e0b;
  --err: #ff4444;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Neural network canvas background */
canvas#neural-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

/* Subtle grid overlay for depth */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* Top nav bar (bizdnai.com style) */
.topbar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: rgba(26, 26, 26, 0.65);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #0a0a0a;
  font-size: 16px;
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.4);
}
.brand-name { font-weight: 700; font-size: 16px; letter-spacing: 0.2px; }
.brand-name span { color: var(--accent); }
.topbar .toplinks {
  display: flex;
  gap: 22px;
  font-size: 13px;
  color: var(--muted);
}
.topbar .toplinks a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
.topbar .toplinks a:hover { color: var(--accent); }

/* Header */
header.page {
  position: relative;
  z-index: 1;
  padding: 32px 32px 8px;
  max-width: 1600px;
  margin: 0 auto;
}
header.page h1 {
  margin: 0 0 6px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.3px;
}
header.page h1 .accent {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
header.page .subtitle {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.controls {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin-bottom: 24px;
}
.controls label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.controls select {
  background: rgba(10, 10, 10, 0.6);
  color: var(--text);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  outline: none;
}
.controls select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.15); }
.updated { color: var(--muted); font-size: 12px; margin-left: auto; }
.updated .dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--ok);
  margin-right: 6px;
  box-shadow: 0 0 8px var(--ok);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* Main */
main {
  position: relative;
  z-index: 1;
  padding: 8px 32px 40px;
  max-width: 1600px;
  margin: 0 auto;
}

/* KPI grid */
.kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.kpi {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 18px 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.kpi::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0.7;
}
.kpi:hover { border-color: var(--card-border-strong); transform: translateY(-2px); }
.kpi-label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 6px;
}
.kpi-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.4px;
}
.kpi-value.ok { color: var(--ok); }
.kpi-value.warn { color: var(--warn); }
.kpi-value.acc { color: var(--accent); }

/* Chart grid */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 18px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}
.card h2 {
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.card h2 .accent { color: var(--accent); }
.card canvas { max-height: 240px; }

/* Table */
.table-card { padding: 0; overflow: hidden; }
.table-card h2 { padding: 18px 18px 0; margin: 0; }
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  text-align: left;
  padding: 10px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
th {
  color: var(--muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  background: rgba(0, 0, 0, 0.25);
}
tbody tr:hover { background: rgba(0, 212, 255, 0.04); }
tbody tr:last-child td { border-bottom: none; }
td code, th code {
  background: rgba(0, 212, 255, 0.08);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

.status {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.status.ok { background: rgba(74, 222, 128, 0.15); color: var(--ok); border: 1px solid rgba(74, 222, 128, 0.3); }
.status.failed { background: rgba(255, 68, 68, 0.15); color: var(--err); border: 1px solid rgba(255, 68, 68, 0.3); }
.status.human_stop { background: rgba(245, 158, 11, 0.15); color: var(--warn); border: 1px solid rgba(245, 158, 11, 0.3); }

/* Classic footer */
footer.site {
  position: relative;
  z-index: 1;
  margin-top: 24px;
  padding: 28px 32px 32px;
  border-top: 1px solid rgba(0, 212, 255, 0.15);
  background: rgba(10, 10, 10, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
footer.site .inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--muted);
}
footer.site .copyright { color: var(--text); }
footer.site .links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
footer.site .links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
footer.site .links a:hover { color: var(--accent); }
footer.site .links a svg { width: 14px; height: 14px; opacity: 0.8; }
footer.site .src {
  margin-top: 10px;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.7;
  max-width: 1600px;
  margin-left: auto;
  margin-right: auto;
}
footer.site .src code {
  background: rgba(0, 212, 255, 0.08);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 11px;
}

@media (max-width: 900px) {
  .kpis { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: 1fr; }
  .topbar { padding: 14px 16px; }
  .topbar .toplinks { display: none; }
  header.page, main { padding-left: 16px; padding-right: 16px; }
  footer.site { padding: 22px 16px 24px; }
  footer.site .inner { justify-content: flex-start; }
}

/* ==================== Recommend tab ==================== */
.picker-card {
  background: var(--surface, #161b22);
  border: 1px solid var(--border, #30363d);
  border-radius: 12px;
  padding: 16px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}
.picker-card:hover { border-color: var(--accent, #00D4FF); transform: translateY(-2px); }
.picker-icon { font-size: 28px; margin-bottom: 8px; }
.picker-label { font-weight: 600; font-size: 14px; }
.picker-meta { font-size: 11px; color: var(--muted, #8b949e); margin-top: 4px; }

.best-card {
  background: linear-gradient(135deg, rgba(0,212,255,0.10) 0%, rgba(216,27,255,0.10) 100%);
  border: 2px solid var(--accent, #00D4FF);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
}
.best-header { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 16px; }
.star { font-size: 48px; }
.best-info { flex: 1; }
.best-overline { font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent, #00D4FF); margin-bottom: 4px; }
.best-model { font-size: 28px; font-weight: 700; margin-bottom: 4px; }
.best-strength { color: var(--muted, #8b949e); font-size: 13px; }
.best-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.best-stats .big { font-size: 28px; font-weight: 700; }
.best-stats .big:first-child { color: var(--accent, #00D4FF); }
.best-stats .small { font-size: 11px; color: var(--muted, #8b949e); }
.why-title { font-size: 13px; color: var(--muted, #8b949e); margin-bottom: 6px; }
.why-body { background: rgba(0,0,0,0.25); border-radius: 8px; padding: 12px; font-size: 13px; white-space: pre-wrap; font-family: inherit; line-height: 1.55; }
.confidence { font-size: 11px; margin-top: 12px; }

.alt-title { font-size: 16px; font-weight: 600; margin-bottom: 12px; color: var(--muted, #8b949e); }
.alt-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; }
.alt-card { background: var(--surface, #161b22); border: 1px solid var(--border, #30363d); border-radius: 12px; padding: 14px; }
.alt-header { display: flex; align-items: baseline; gap: 8px; margin-bottom: 10px; }
.alt-name { font-weight: 600; font-size: 14px; }
.alt-bestat { font-size: 11px; color: var(--muted, #8b949e); }
.alt-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; font-size: 13px; }
.alt-meta { color: var(--muted, #8b949e); font-size: 11px; }
.alt-runs { font-size: 11px; margin-top: 8px; }

.empty-state { text-align: center; padding: 48px 16px; color: var(--muted, #8b949e); }
.empty-icon { font-size: 48px; margin-bottom: 12px; }
.muted { color: var(--muted, #8b949e); }
.small { font-size: 12px; }

@media (max-width: 900px) {
  .best-stats { grid-template-columns: 1fr; }
  .picker-icon { font-size: 22px; }
}