:root {
  --bg:         #000000;
  --bg-2:       #0b1422;
  --ink:        #e8f4ff;
  --ink-mid:    #b0c4dc;          /* brighter middle tone */
  --ink-dim:    #7d92b0;
  --ink-faint:  #2a3b54;
  --accent:     #5fe8ff;
  --accent-hi:  #b8f5ff;
  --accent-lo:  rgba(95, 232, 255, 0.18);
  --good:       #5fffa8;
  --warn:       #ff9d6e;
  --hot:        #ffd16e;

  --pad-l:  150px;   /* heavy left padding: right-aligned HUD (intro/ready/done/train) */
  --pad-r:  44px;
  --pad-t:  60px;    /* below topbar */
  --pad-b:  54px;    /* above hintbar */
}

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

html, body {
  width: 600px;
  height: 600px;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: "SF Pro Display", "Inter", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
  font-weight: 500;
  font-size: 17px;
  user-select: none;
}

button {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  letter-spacing: inherit;
}

/* subtle scanline overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent 0px, transparent 2px,
    rgba(0,0,0,0.20) 3px, rgba(0,0,0,0.20) 4px
  );
  pointer-events: none;
  z-index: 100;
  mix-blend-mode: multiply;
}

#app {
  position: relative;
  width: 600px;
  height: 600px;
  overflow: hidden;
}

/* ─────────── Topbar ─────────── */
.topbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 44px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
  z-index: 10;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 1.8s infinite ease-in-out;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.45; transform: scale(0.82); }
}
.brand-name {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.34em;
  font-size: 13px;
}
.topbar-right {
  display: inline-flex;
  gap: 12px;
  align-items: center;
}
.phase-pill {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 3px 9px;
  border: 1px solid var(--accent-lo);
  background: rgba(95, 232, 255, 0.06);
  border-radius: 2px;
}
.sensor-pill { color: var(--ink-dim); }
.sensor-pill em { font-style: normal; color: var(--ink); }
.sensor-pill.ok em { color: var(--good); }
.sensor-pill.warn em { color: var(--warn); }

/* ─────────── Hintbar ─────────── */
.hintbar {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 36px;
  padding: 0 24px;
  display: flex;
  justify-content: center;
  gap: 22px;
  align-items: center;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
  z-index: 10;
}
kbd {
  display: inline-block;
  padding: 1px 7px;
  border: 1px solid var(--ink-faint);
  border-radius: 3px;
  background: var(--bg-2);
  color: var(--ink);
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px;
  margin-right: 4px;
}

/* ─────────── Screens ─────────── */
.screen {
  position: absolute;
  inset: 0;
  padding: var(--pad-t) var(--pad-r) var(--pad-b) var(--pad-l);
  display: flex;
  flex-direction: column;
  animation: screenIn 240ms ease-out;
  background: var(--bg);
}
.screen.hidden, .overlay.hidden { display: none !important; }

@keyframes screenIn {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ─────────── Intro / Ready / Done text blocks ─────────── */
.intro-block {
  display: flex;
  flex-direction: column;
  gap: 18px;
  justify-content: center;
  flex: 1;
}
.eyebrow {
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--accent);
  font-weight: 700;
}
.eyebrow.good { color: var(--good); }
.big-title {
  font-size: 56px;
  line-height: 1.0;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.big-title .thin {
  color: var(--ink-mid);
  font-weight: 300;
}
.med-title {
  font-size: 44px;
  line-height: 1.0;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.med-title .hot { color: var(--hot); }
.lede {
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink);              /* full contrast */
  max-width: 420px;
  font-weight: 500;
}
.lede b { color: var(--accent); font-weight: 700; }
.lede .emoji {
  font-size: 28px;
  vertical-align: middle;
  margin-left: 4px;
  display: inline-block;
  filter: saturate(1.1);
}

/* CTA */
.cta-row {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.primary {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--accent);
  padding: 14px 26px;
  border: 1.5px solid var(--accent);
  border-radius: 2px;
  background: rgba(95, 232, 255, 0.06);
  transition: background 120ms, color 120ms, transform 120ms;
}
.primary:hover,
.primary:focus-visible,
.primary.focused {
  background: var(--accent);
  color: var(--bg);
  outline: none;
  box-shadow: 0 0 22px var(--accent-lo);
}
.primary:active { transform: translateY(1px); }
.secondary {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--ink-mid);
  padding: 14px 20px;
  border: 1px solid var(--ink-faint);
  border-radius: 2px;
  transition: color 120ms, background 120ms, border-color 120ms;
}
.secondary:hover,
.secondary.focused {
  color: var(--bg);
  background: var(--ink);
  border-color: var(--ink);
}

/* ─────────── Training screen (centered, single column) ─────────── */
.train-screen {
  padding: 56px 28px 60px 28px;
  display: flex;
}
.train-stack {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
}
.train-eyebrow {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  line-height: 1.0;
}
.train-headline {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.0;
}
.train-count {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 144px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.06em;
  line-height: 0.9;
  margin-top: 14px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.train-of {
  font-size: 36px;
  color: var(--ink-faint);
  letter-spacing: -0.02em;
}
.train-progress {
  width: 280px;
  height: 6px;
  background: var(--ink-faint);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 6px;
}
.signal-row.centered {
  align-items: center;
  width: 220px;
}
.count-card {
  background: var(--bg-2);
  border: 1px solid var(--ink-faint);
  border-radius: 6px;
  padding: 18px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.count-card-head {
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--ink-mid);
  font-weight: 700;
}
.count-card-num {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 64px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--accent);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.count-card-num .of {
  font-size: 22px;
  color: var(--ink-faint);
}
.count-bar {
  height: 6px;
  background: var(--ink-faint);
  border-radius: 3px;
  overflow: hidden;
}
.count-bar.tall { height: 8px; }
.count-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--good));
  transition: width 0.16s ease-out;
}
.signal-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 14px;
}
.signal-label {
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--ink-dim);
}
.signal-meter {
  height: 4px;
  background: var(--ink-faint);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}
.signal-meter-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.04s linear;
}

/* ─────────── Ready screen stats ─────────── */
.ready-stats {
  display: flex;
  gap: 14px;
  margin-top: 8px;
}
.ready-stat {
  background: var(--bg-2);
  border: 1px solid var(--ink-faint);
  border-radius: 4px;
  padding: 12px 18px;
  min-width: 100px;
}
.ready-stat-k {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  margin-bottom: 4px;
}
.ready-stat-v {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 36px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

/* ─────────── BRUSHING SCREEN (centered, big) ─────────── */
.brush-screen {
  padding: 52px 28px 64px 28px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 4px;
}
.brush-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}
.brush-metrics {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.bm-row {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-family: "SF Mono", Menlo, monospace;
}
.bm-k {
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  min-width: 50px;
  font-family: "SF Pro Display", system-ui, sans-serif;
  font-weight: 700;
}
.bm-v {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
}
.brush-count-block {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-family: "SF Mono", Menlo, monospace;
  line-height: 0.9;
}
.big-count-num {
  font-size: 84px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.05em;
  transition: color 120ms, text-shadow 120ms;
  line-height: 0.85;
}
.big-count-num.bump {
  color: var(--good);
  text-shadow: 0 0 16px var(--good);
}
.big-count-of {
  font-size: 24px;
  color: var(--ink-faint);
  margin-top: 2px;
}

.brush-mid {
  display: flex;
  align-items: center;
  justify-content: center;
}
.mouth {
  width: 170px;
  height: 215px;
}
.mouth.big {
  width: 240px;
  height: 295px;
}
.mouth .arch {
  fill: none;
  stroke: var(--ink-faint);
  stroke-width: 16;
  stroke-linecap: round;
  transition: stroke 220ms ease-out, filter 220ms;
}
.mouth.big .arch { stroke-width: 22; }
.mouth.big .arch.inner { stroke-width: 12; stroke-dasharray: 6 6; }
.mouth .arch.inner { stroke-width: 8; stroke-dasharray: 4 4; }
.mouth .arch.active {
  stroke: var(--accent);
  filter: drop-shadow(0 0 10px var(--accent));
}
.mouth .tongue {
  fill: var(--ink-faint);
  opacity: 0.35;
}
.mouth .mid-dot { fill: var(--ink-dim); }

.brush-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}
.zone-eyebrow {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
}
.zone-eyebrow span:first-child {
  color: var(--accent);
  font-weight: 700;
}
.zone-label {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.0;
}
.zone-sub {
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 6px;
}
.brush-bottom .count-bar {
  width: 60%;
  max-width: 360px;
}

/* ─────────── Done screen ─────────── */
.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 8px;
  max-width: 420px;
}
.result {
  background: var(--bg-2);
  border: 1px solid var(--ink-faint);
  border-radius: 4px;
  padding: 14px 16px;
}
.result-k {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  margin-bottom: 6px;
}
.result-v {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 34px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

/* ─────────── Overlays ─────────── */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 0 var(--pad-r) 0 var(--pad-l);
}
.overlay-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 360px;
}

/* ─────────── ZONE COMPLETE popover ─────────── */
.big-overlay {
  padding: 0;
  background: rgba(0, 0, 0, 0.96);
  animation: overlayIn 200ms ease-out;
}
@keyframes overlayIn {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}
.big-overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}
.big-check {
  font-size: 90px;
  line-height: 1;
  color: var(--good);
  text-shadow: 0 0 24px var(--good);
  margin-bottom: 4px;
}
.big-overlay-eyebrow {
  font-size: 16px;
  letter-spacing: 0.32em;
  color: var(--good);
  font-weight: 700;
  margin-bottom: 22px;
}
.big-overlay-next-label {
  font-size: 13px;
  letter-spacing: 0.36em;
  color: var(--ink-dim);
  font-weight: 700;
}
.big-overlay-zone-name {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1;
  margin-top: 4px;
}
.big-overlay-zone-sub {
  font-size: 14px;
  letter-spacing: 0.28em;
  color: var(--accent);
  font-weight: 700;
  margin-top: 6px;
}