:root {
  --bg: #0a0d12;
  --bg-elevated: #11151c;
  --bg-card: #141922;
  --border: #1f2630;
  --border-strong: #2a3340;

  --fg: #e6ecf3;
  --fg-muted: #8b96a5;
  --fg-dim: #566271;

  --accent: #00e5a0;
  --accent-dim: #00b37d;
  --accent-glow: rgba(0, 229, 160, 0.18);

  --red: #ff5a5f;
  --red-glow: rgba(255, 90, 95, 0.15);
  --amber: #ffb84d;
  --blue: #5ca2ff;

  --font-ui: 'Geist', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-ui);
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}

body {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  height: 100vh;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, var(--accent-glow), transparent 70%),
    linear-gradient(to bottom, rgba(17, 21, 28, 0.5), transparent 40%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

/* ------------------------------------------------------------
   Topbar
   ------------------------------------------------------------ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 13, 18, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  z-index: 10;
}

.back {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.5rem 0.85rem;
  color: var(--fg-muted);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: all 0.2s ease;
}
.back:hover { color: var(--accent); border-color: var(--accent); }

.title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--fg);
}
.title .sub { color: var(--fg-dim); font-weight: 400; }

.best {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
  letter-spacing: 0.08em;
}
.best strong { color: var(--accent); font-weight: 600; }

/* ------------------------------------------------------------
   HUD
   ------------------------------------------------------------ */
.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 5;
}
.stat {
  background: var(--bg-elevated);
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  position: relative;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
}
.stat-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--fg);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-value .unit {
  font-size: 0.7em;
  color: var(--fg-dim);
  margin-left: 2px;
  font-weight: 400;
}
.stat-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
}
.meter {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 0.3rem;
}
.meter-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.meter-rev { background: var(--blue); }
.meter-time { background: var(--amber); }

/* Pulse when ROAS is strong */
.stat-value.pop { animation: pop 0.4s ease-out; }
@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); color: var(--accent); }
  100% { transform: scale(1); }
}
.stat-value.pop-bad {
  animation: popBad 0.4s ease-out;
}
@keyframes popBad {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); color: var(--red); }
  100% { transform: scale(1); }
}

/* ------------------------------------------------------------
   Stage (bid card)
   ------------------------------------------------------------ */
.stage {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  position: relative;
  z-index: 2;
  overflow: hidden;
}

.no-card {
  font-family: var(--font-mono);
  color: var(--fg-dim);
  letter-spacing: 0.1em;
  font-size: 0.85rem;
}

.bid-card {
  width: min(560px, 95%);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  animation: slideIn 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.bid-card.fraud {
  border-color: var(--red);
  box-shadow: 0 0 30px var(--red-glow);
}
.bid-card.dismiss-win {
  animation: dismissWin 0.35s ease-out forwards;
}
.bid-card.dismiss-loss {
  animation: dismissLoss 0.35s ease-out forwards;
}
.bid-card.dismiss-pass {
  animation: dismissPass 0.28s ease-out forwards;
}

@keyframes slideIn {
  from { transform: translateY(20px) scale(0.96); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}
@keyframes dismissWin {
  to { transform: translateY(-30px) scale(1.02); opacity: 0; }
}
@keyframes dismissLoss {
  to { transform: translateX(20px) scale(0.98); opacity: 0; }
}
@keyframes dismissPass {
  to { transform: translateY(10px) scale(0.98); opacity: 0; }
}

.bid-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.bid-row .req-id { color: var(--accent); }

.bid-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.bid-domain {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.bid-ad-unit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  color: var(--fg-muted);
}

.bid-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}
.metric {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.metric-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--fg);
}
.metric-value.good { color: var(--accent); }
.metric-value.mid { color: var(--amber); }
.metric-value.bad { color: var(--red); }

.bid-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.bid-floor {
  color: var(--fg-muted);
}
.bid-floor strong {
  color: var(--fg);
  font-weight: 600;
}

.bid-flags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.flag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: 2px;
  border: 1px solid currentColor;
}
.flag.flag-bad { color: var(--red); }
.flag.flag-warn { color: var(--amber); }
.flag.flag-good { color: var(--accent); }

/* Decision timer (TTL bar on the card) */
.ttl {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 0 0 10px 10px;
  transition: width linear;
}
.ttl.danger { background: var(--red); }

/* ------------------------------------------------------------
   Actions
   ------------------------------------------------------------ */
.actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 10;
}
.action {
  background: var(--bg-elevated);
  border: none;
  padding: 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
  color: var(--fg);
  font-family: var(--font-ui);
  transition: background 0.15s ease, color 0.15s ease;
  position: relative;
}
.action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.action:not(:disabled):hover {
  background: var(--bg-card);
}
.action .num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fg-dim);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  padding: 1px 6px;
  letter-spacing: 0.05em;
}
.action .label {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.action .hint {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
}

.action-high:not(:disabled):hover { color: var(--accent); }
.action-high:not(:disabled):hover .num { border-color: var(--accent); color: var(--accent); }
.action-low:not(:disabled):hover { color: var(--blue); }
.action-low:not(:disabled):hover .num { border-color: var(--blue); color: var(--blue); }
.action-pass:not(:disabled):hover { color: var(--fg-muted); }

/* ------------------------------------------------------------
   Overlays (start / end)
   ------------------------------------------------------------ */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(10, 13, 18, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 0.3s ease-out;
}
.overlay[hidden] { display: none; }
@keyframes fadeIn { from { opacity: 0; } }

.overlay-inner {
  max-width: 560px;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 2.5rem 2rem;
}
.overlay-inner.overlay-wide { max-width: 640px; }

/* Annotated example card on start overlay */
.example {
  margin: 0.5rem 0 1.75rem;
  text-align: left;
}
.example-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  text-align: center;
}
.example-card {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.ex-row {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.ex-accent { color: var(--accent); }
.ex-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}
.ex-domain {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
}
.ex-unit {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 7px;
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  color: var(--fg-muted);
}
.ex-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}
.ex-metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.ex-lbl {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
}
.ex-val {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
}
.ex-val.ex-good { color: var(--accent); }
.ex-note {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  color: var(--fg-muted);
  font-style: italic;
  line-height: 1.3;
}
.ex-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
  flex-wrap: wrap;
  gap: 0.5rem;
}
.ex-footer strong { color: var(--fg); font-weight: 600; }
.ex-note-inline {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--fg-muted);
  font-style: italic;
  margin-left: 4px;
}
.ex-flag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: 2px;
  border: 1px solid currentColor;
}
.ex-flag-good { color: var(--accent); }
.example-tip {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--fg-muted);
  margin-top: 0.75rem;
  text-align: center;
  line-height: 1.45;
}
.ex-bad-text { color: var(--red); }

@media (max-width: 640px) {
  .ex-metrics { grid-template-columns: 1fr; gap: 0.5rem; }
  .ex-metric { flex-direction: row; align-items: baseline; gap: 0.5rem; }
  .ex-val { min-width: 50px; }
}
.overlay .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.overlay h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  color: var(--fg);
  line-height: 1.1;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
.overlay h1 .accent { color: var(--accent); }
.overlay .lede {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.keys {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.key-group {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.kbd {
  display: inline-block;
  min-width: 1.8em;
  padding: 2px 6px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  color: var(--accent);
  font-weight: 600;
  text-align: center;
}

.primary {
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  padding: 0.9rem 2.2rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.primary:hover {
  background: var(--fg);
  transform: translateY(-1px);
}

.overlay-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.ghost {
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  padding: 0.9rem 1.4rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  display: inline-block;
}
.ghost:hover {
  color: var(--fg);
  border-color: var(--fg-muted);
}

.end-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.end-stats > div {
  background: var(--bg-elevated);
  padding: 1rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.end-stats span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
}
.end-stats strong {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--fg);
  font-weight: 600;
}
.note {
  color: var(--fg-muted);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

/* ------------------------------------------------------------
   Toasts
   ------------------------------------------------------------ */
.toasts {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.toast {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  animation: toastUp 0.9s ease-out forwards;
  white-space: nowrap;
}
.toast.good { color: var(--accent); }
.toast.bad { color: var(--red); }
.toast.neutral { color: var(--fg-muted); }

@keyframes toastUp {
  0% { transform: translateY(0) scale(0.9); opacity: 0; }
  15% { transform: translateY(-10px) scale(1.05); opacity: 1; }
  80% { transform: translateY(-40px) scale(1); opacity: 1; }
  100% { transform: translateY(-60px) scale(1); opacity: 0; }
}

/* ------------------------------------------------------------
   Responsive
   ------------------------------------------------------------ */
@media (max-width: 640px) {
  .topbar { padding: 0.75rem 1rem; }
  .title { font-size: 0.75rem; }
  .title .sub { display: none; }
  .best { font-size: 0.65rem; }

  .hud { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 0.7rem 1rem; }
  .stat-value { font-size: 1.3rem; }

  .bid-card { padding: 1.25rem; gap: 0.75rem; }
  .bid-domain { font-size: 1.1rem; }
  .bid-metrics { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
  .metric-value { font-size: 0.95rem; }

  .action { padding: 1rem 0.5rem; }
  .action .label { font-size: 0.8rem; }
  .action .hint { display: none; }

  .end-stats { grid-template-columns: repeat(2, 1fr); }
  .overlay-inner { padding: 1.5rem 1.25rem; }
  .keys { gap: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}