:root {
  color-scheme: dark;
  --bg: #070a0f;
  --bg-raised: #0d1118;
  --panel: rgba(15, 20, 28, 0.82);
  --panel-solid: #11161f;
  --line: rgba(188, 210, 226, 0.13);
  --line-strong: rgba(188, 210, 226, 0.24);
  --text: #eef3f1;
  --muted: #8e9ba7;
  --muted-bright: #b4bec5;
  --accent: #c7f75a;
  --accent-strong: #a6df35;
  --accent-soft: rgba(199, 247, 90, 0.12);
  --cyan: #59d8ff;
  --red: #ff665f;
  --yellow: #ffd64a;
  --blue: #4fa8ff;
  --green: #9bdf56;
  --danger: #ff615c;
  --radius: 18px;
  --mono: "Cascadia Code", "SFMono-Regular", "Roboto Mono", Consolas, monospace;
  --sans: "Inter", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.014) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.014) 1px, transparent 1px),
    var(--bg);
  background-size: 42px 42px;
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.site-glow {
  position: fixed;
  z-index: -1;
  width: 42vw;
  height: 42vw;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.075;
  pointer-events: none;
}

.site-glow-a {
  top: -20vw;
  right: -10vw;
  background: var(--accent);
}

.site-glow-b {
  bottom: -28vw;
  left: -18vw;
  background: var(--cyan);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(140px, 1fr);
  align-items: center;
  height: 82px;
  padding: 0 max(24px, calc((100vw - 1220px) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(7, 10, 15, 0.8);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 13px;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid rgba(199, 247, 90, 0.7);
  border-radius: 50%;
  box-shadow: inset 0 0 0 5px rgba(199, 247, 90, 0.03);
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  content: "";
  background: var(--accent);
}

.brand-mark::before {
  width: 44px;
  height: 1px;
}

.brand-mark::after {
  width: 1px;
  height: 44px;
}

.brand-mark span {
  z-index: 1;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-copy strong {
  font-size: 16px;
  letter-spacing: 0.04em;
}

.brand-copy small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.16em;
}

.main-nav {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: 4px;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.nav-link span {
  color: #55606a;
  font-family: var(--mono);
  font-size: 9px;
}

.nav-link::after {
  position: absolute;
  right: 16px;
  bottom: -1px;
  left: 16px;
  height: 2px;
  background: var(--accent);
  content: "";
  opacity: 0;
  transform: scaleX(0.3);
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
}

.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-link.active span {
  color: var(--accent);
}

.system-state {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.03em;
}

.system-state i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(199, 247, 90, 0.9);
}

main {
  width: min(1220px, calc(100% - 48px));
  margin: 0 auto;
}

.view {
  display: none;
  min-height: calc(100vh - 150px);
  animation: view-in 320ms ease both;
}

.view.active {
  display: block;
}

@keyframes view-in {
  from {
    opacity: 0;
    transform: translateY(9px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.92fr);
  align-items: center;
  min-height: 600px;
  padding: 70px 0 60px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding-left: 44px;
}

.hero-copy::before {
  position: absolute;
  top: 4px;
  bottom: 9px;
  left: 0;
  width: 1px;
  background: linear-gradient(var(--accent), rgba(199, 247, 90, 0.05));
  content: "";
}

.eyebrow,
.section-kicker {
  display: flex;
  align-items: center;
  gap: 13px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.eyebrow i {
  width: 46px;
  height: 1px;
  background: rgba(199, 247, 90, 0.5);
}

.hero h1 {
  margin: 25px 0 22px;
  font-size: clamp(56px, 7vw, 92px);
  font-weight: 800;
  letter-spacing: -0.07em;
  line-height: 0.98;
}

.hero h1 span {
  color: var(--accent);
}

.hero-lead {
  max-width: 560px;
  margin: 0;
  color: var(--muted-bright);
  font-size: 15px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition:
    color 160ms ease,
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button-primary {
  background: var(--accent);
  color: #10150a;
}

.button-primary:hover {
  background: #d7ff80;
}

.button-primary svg {
  width: 18px;
  margin-left: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.button-secondary,
.button-quiet {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--muted-bright);
}

.button-secondary:hover,
.button-quiet:hover {
  border-color: rgba(199, 247, 90, 0.45);
  color: var(--accent);
}

.full-width {
  width: 100%;
}

.text-link {
  padding: 8px 0;
  border-bottom: 1px solid var(--line-strong);
  color: var(--muted-bright);
  font-size: 12px;
  text-decoration: none;
  transition: color 160ms ease;
}

.text-link:hover {
  color: var(--accent);
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 34px;
  color: #6f7b85;
  font-size: 10px;
}

.key {
  display: inline-flex;
  min-height: 20px;
  align-items: center;
  justify-content: center;
  padding: 0 7px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--muted-bright);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.divider {
  width: 1px;
  height: 12px;
  margin: 0 3px;
  background: var(--line-strong);
}

.hero-visual {
  position: relative;
  width: min(43vw, 510px);
  aspect-ratio: 1;
  justify-self: center;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(199, 247, 90, 0.07) 0, rgba(199, 247, 90, 0.01) 35%, transparent 68%);
}

.hero-visual::before {
  position: absolute;
  inset: 8%;
  border: 1px dashed rgba(199, 247, 90, 0.16);
  border-radius: 50%;
  content: "";
  animation: rotate 70s linear infinite;
}

.radar-ring {
  position: absolute;
  border: 1px solid rgba(199, 247, 90, 0.16);
  border-radius: 50%;
}

.radar-ring-one {
  inset: 17%;
}

.radar-ring-two {
  inset: 30%;
}

.radar-ring-three {
  inset: 43%;
  border-color: rgba(199, 247, 90, 0.3);
}

.radar-cross {
  position: absolute;
  top: 50%;
  left: 7%;
  width: 86%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(199, 247, 90, 0.15), transparent);
}

.radar-cross-y {
  transform: rotate(90deg);
}

.radar-sweep {
  position: absolute;
  inset: 8%;
  overflow: hidden;
  border-radius: 50%;
  animation: rotate 8s linear infinite;
}

.radar-sweep::after {
  position: absolute;
  top: 0;
  left: 50%;
  width: 50%;
  height: 50%;
  background: conic-gradient(from 270deg, rgba(199, 247, 90, 0.17), transparent 28%);
  content: "";
  transform-origin: bottom left;
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}

.target-dot {
  position: absolute;
  z-index: 2;
  top: calc(50% - 4px);
  left: calc(50% - 4px);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow:
    0 0 0 8px rgba(199, 247, 90, 0.08),
    0 0 24px var(--accent);
}

.radar-label {
  position: absolute;
  color: rgba(199, 247, 90, 0.65);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.18em;
}

.radar-label-top {
  top: 7%;
  left: 50%;
  transform: translateX(-50%);
}

.radar-label-bottom {
  bottom: 5%;
  left: 50%;
  transform: translateX(-50%);
}

.radar-readout {
  position: absolute;
  right: 1%;
  bottom: 23%;
  display: flex;
  flex-direction: column;
  padding-left: 12px;
  border-left: 1px solid var(--accent);
}

.radar-readout span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.16em;
}

.radar-readout strong {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
}

.metric-strip {
  display: grid;
  grid-template-columns: 1.1fr repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(14, 19, 27, 0.48);
}

.metric-intro,
.metric-item {
  min-height: 105px;
  padding: 24px 28px;
}

.metric-intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid var(--line);
}

.metric-intro span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.15em;
}

.metric-intro strong {
  margin-top: 9px;
  font-size: 16px;
}

.metric-item {
  display: grid;
  grid-template-columns: 1fr;
  align-content: center;
  border-right: 1px solid var(--line);
}

.metric-item:last-child {
  border-right: 0;
}

.metric-item span {
  color: var(--muted);
  font-size: 10px;
}

.metric-item strong {
  margin: 6px 0 3px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 23px;
  font-weight: 500;
}

.metric-item small {
  color: #59646d;
  font-size: 9px;
}

.modes-section {
  padding: 100px 0 90px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 34px;
}

.section-heading h2,
.protocol-copy h2 {
  margin: 11px 0 0;
  font-size: clamp(30px, 3.5vw, 45px);
  letter-spacing: -0.04em;
}

.section-heading p {
  max-width: 390px;
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
  text-align: right;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.mode-card {
  position: relative;
  display: flex;
  min-height: 315px;
  flex-direction: column;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(145deg, rgba(22, 29, 39, 0.82), rgba(12, 16, 23, 0.82));
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition:
    border-color 200ms ease,
    transform 200ms ease,
    background 200ms ease;
}

.mode-card::before {
  position: absolute;
  inset: auto 0 0;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 240ms ease;
}

.mode-card::after {
  position: absolute;
  top: -70px;
  right: -70px;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(199, 247, 90, 0.06);
  border-radius: 50%;
  content: "";
}

.mode-card:hover {
  z-index: 1;
  border-color: rgba(199, 247, 90, 0.3);
  background: linear-gradient(145deg, rgba(27, 35, 45, 0.95), rgba(13, 18, 25, 0.95));
  transform: translateY(-4px);
}

.mode-card:hover::before {
  transform: scaleX(1);
}

.mode-number {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.13em;
}

.mode-icon {
  display: grid;
  width: 52px;
  height: 52px;
  margin: 29px 0 26px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.018);
}

.mode-icon svg {
  width: 30px;
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.2;
}

.mode-content {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.mode-content strong {
  font-size: 21px;
  letter-spacing: -0.02em;
}

.mode-content > span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.8;
}

.mode-meta {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 24px;
}

.mode-meta span {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: #6e7b85;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.mode-arrow {
  position: absolute;
  right: 23px;
  bottom: 20px;
  color: #53606a;
  font-size: 18px;
  transition:
    color 160ms ease,
    transform 160ms ease;
}

.mode-card:hover .mode-arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

.protocol-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 80px;
  padding: 60px 0 110px;
  border-top: 1px solid var(--line);
}

.protocol-copy p {
  max-width: 470px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}

.protocol-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.protocol-steps li {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 68px;
  border-bottom: 1px solid var(--line);
}

.protocol-steps > li > span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10px;
}

.protocol-steps div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  gap: 20px;
}

.protocol-steps strong {
  font-size: 13px;
}

.protocol-steps small {
  color: var(--muted);
  font-size: 10px;
}

.page-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  padding: 62px 0 35px;
}

.page-heading h1 {
  margin: 12px 0 10px;
  font-size: clamp(42px, 5vw, 64px);
  letter-spacing: -0.055em;
  line-height: 1;
}

.page-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.session-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.12em;
}

.session-badge i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.training-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 16px;
  padding-bottom: 100px;
}

.test-panel,
.instruction-panel {
  border: 1px solid var(--line);
  background: var(--panel);
}

.test-panel {
  min-width: 0;
  padding: 20px;
}

.instruction-panel {
  align-self: start;
  padding: 25px;
}

.test-hud,
.schulte-stats,
.stroop-hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--line);
}

.hud-item {
  min-width: 0;
  padding: 2px 17px 15px;
  border-right: 1px solid var(--line);
}

.hud-item:first-child {
  padding-left: 2px;
}

.hud-item:last-child {
  border-right: 0;
}

.hud-item.personal {
  text-align: right;
}

.hud-item span,
.schulte-stat span {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 9px;
}

.hud-item strong,
.schulte-stat strong {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 500;
}

.hud-item.personal strong {
  color: var(--accent);
}

.reaction-stage {
  position: relative;
  display: grid;
  width: 100%;
  min-height: 460px;
  margin-top: 20px;
  overflow: hidden;
  place-items: center;
  border: 1px solid rgba(255, 111, 92, 0.34);
  border-radius: 5px;
  background:
    radial-gradient(circle at center, rgba(255, 108, 87, 0.08), transparent 48%),
    #321412;
  color: #ffd3ce;
  cursor: pointer;
  user-select: none;
}

.reaction-stage[data-state="waiting"] {
  border-color: rgba(255, 111, 92, 0.28);
  background:
    radial-gradient(circle at center, rgba(255, 111, 92, 0.08), transparent 48%),
    #271311;
}

.reaction-stage[data-state="ready"] {
  border-color: rgba(199, 247, 90, 0.88);
  background:
    radial-gradient(circle at center, rgba(232, 255, 178, 0.18), transparent 44%),
    #b8ed4b;
  color: #172005;
  cursor: crosshair;
}

.reaction-stage[data-state="early"] {
  border-color: #ff4f49;
  background: #5d1b19;
  color: #fff;
}

.reaction-stage[data-state="early"] .stage-content {
  animation: shake 260ms ease;
}

.reaction-stage[data-state="result"],
.reaction-stage[data-state="complete"] {
  border-color: rgba(199, 247, 90, 0.3);
  background:
    radial-gradient(circle at center, rgba(199, 247, 90, 0.1), transparent 48%),
    #0b1410;
  color: var(--text);
}

@keyframes shake {
  25% {
    transform: translateX(-8px);
  }
  50% {
    transform: translateX(7px);
  }
  75% {
    transform: translateX(-3px);
  }
}

.stage-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black, transparent 78%);
}

.stage-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.stage-kicker {
  margin-bottom: 15px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  opacity: 0.67;
}

.stage-title {
  font-size: clamp(30px, 4.5vw, 50px);
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.reaction-stage[data-state="ready"] .stage-title {
  font-size: clamp(54px, 7vw, 84px);
}

.stage-hint {
  margin-top: 17px;
  font-size: 11px;
  opacity: 0.7;
}

.stage-corner {
  position: absolute;
  z-index: 1;
  width: 17px;
  height: 17px;
  border-color: currentColor;
  border-style: solid;
  opacity: 0.45;
}

.stage-corner-tl {
  top: 16px;
  left: 16px;
  border-width: 1px 0 0 1px;
}

.stage-corner-tr {
  top: 16px;
  right: 16px;
  border-width: 1px 1px 0 0;
}

.stage-corner-bl {
  bottom: 16px;
  left: 16px;
  border-width: 0 0 1px 1px;
}

.stage-corner-br {
  right: 16px;
  bottom: 16px;
  border-width: 0 1px 1px 0;
}

.stage-key-hint {
  position: absolute;
  right: 20px;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 8px;
  opacity: 0.62;
}

.round-track {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 14px;
}

.round-slot {
  display: flex;
  min-height: 45px;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
  color: #59646c;
  font-family: var(--mono);
  font-size: 9px;
}

.round-slot strong {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
}

.round-slot.active {
  border-color: rgba(255, 111, 92, 0.35);
  color: #ff8e83;
}

.round-slot.done {
  border-color: rgba(199, 247, 90, 0.2);
}

.round-slot.done strong {
  color: var(--accent);
}

.panel-label {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.16em;
}

.instruction-panel h2 {
  margin: 15px 0 26px;
  font-size: 26px;
  letter-spacing: -0.04em;
  line-height: 1.3;
}

.instruction-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.instruction-list li {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted-bright);
  font-size: 11px;
  line-height: 1.65;
}

.instruction-list li span {
  display: grid;
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 8px;
}

.tip-box {
  margin: 22px 0;
  padding: 14px 15px;
  border-left: 2px solid rgba(199, 247, 90, 0.5);
  background: rgba(199, 247, 90, 0.035);
}

.tip-box strong {
  color: var(--muted-bright);
  font-size: 10px;
}

.tip-box p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.7;
}

.schulte-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.difficulty-picker {
  display: flex;
  gap: 5px;
}

.difficulty-picker button {
  min-width: 57px;
  height: 34px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 9px;
}

.difficulty-picker button:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

.difficulty-picker button.active {
  border-color: rgba(199, 247, 90, 0.45);
  background: var(--accent-soft);
  color: var(--accent);
}

.difficulty-picker button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.compact-button {
  min-height: 34px;
  padding: 0 17px;
  font-size: 11px;
}

.schulte-stats {
  margin-top: 17px;
  padding-bottom: 16px;
}

.schulte-stat {
  padding: 0 17px;
  border-right: 1px solid var(--line);
}

.schulte-stat:first-child {
  padding-left: 2px;
}

.schulte-stat:last-child {
  border-right: 0;
}

.schulte-stat.time-stat strong {
  color: var(--accent);
}

.schulte-stat:not(.time-stat):last-child strong {
  color: var(--accent);
}

.schulte-board-shell {
  position: relative;
  width: min(100%, 570px);
  margin: 7px auto 0;
  aspect-ratio: 1;
}

.schulte-board {
  display: grid;
  width: 100%;
  height: 100%;
  grid-template-columns: repeat(var(--grid-size), 1fr);
  grid-template-rows: repeat(var(--grid-size), 1fr);
  gap: 5px;
  padding: 5px;
  border: 1px solid var(--line);
  background: #090d13;
}

.schulte-cell {
  display: grid;
  min-width: 0;
  min-height: 0;
  place-items: center;
  border: 1px solid rgba(188, 210, 226, 0.11);
  border-radius: 2px;
  background: #121820;
  color: #dbe3e7;
  cursor: pointer;
  font-family: var(--mono);
  font-size: clamp(14px, 3vw, 26px);
  font-weight: 500;
  transition:
    color 100ms ease,
    background 100ms ease,
    border-color 100ms ease,
    transform 100ms ease;
}

.schulte-cell:hover:not(:disabled) {
  border-color: rgba(199, 247, 90, 0.45);
  background: #19221f;
  color: var(--accent);
}

.schulte-cell:disabled {
  cursor: default;
}

.schulte-cell.done {
  border-color: rgba(199, 247, 90, 0.1);
  background: rgba(199, 247, 90, 0.035);
  color: rgba(199, 247, 90, 0.26);
}

.schulte-cell.error {
  border-color: var(--danger);
  background: rgba(255, 97, 92, 0.18);
  color: #fff;
  transform: scale(0.96);
}

.board-overlay {
  position: absolute;
  z-index: 4;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 28px;
  background: rgba(7, 10, 15, 0.82);
  text-align: center;
  backdrop-filter: blur(6px);
  transition:
    opacity 170ms ease,
    visibility 170ms ease;
}

.board-overlay.hidden {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.overlay-label {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.17em;
}

.board-overlay strong {
  margin-top: 12px;
  font-size: 32px;
  letter-spacing: -0.04em;
}

.board-overlay p {
  margin: 10px 0 23px;
  color: var(--muted);
  font-size: 11px;
}

.live-status {
  min-height: 20px;
  margin-top: 13px;
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}

.live-status.error {
  color: #ff928b;
}

.live-status.success {
  color: var(--accent);
}

.scale-legend {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 22px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
}

.scale-bar {
  height: 3px;
  flex: 1;
  overflow: hidden;
  background: var(--line);
}

.scale-bar i {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transition: width 130ms ease;
}

.stroop-card {
  position: relative;
  min-height: 680px;
}

.stroop-arena {
  position: relative;
  display: flex;
  min-height: 350px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  overflow: hidden;
  margin-top: 18px;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    #0b1017;
  background-size: 34px 34px;
  transition:
    border-color 140ms ease,
    background-color 140ms ease;
}

.stroop-arena.shake {
  animation: shake 240ms ease;
}

.arena-target {
  position: absolute;
  top: 50%;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(199, 247, 90, 0.12);
  border-radius: 50%;
  transform: translateY(-50%);
}

.arena-target::before,
.arena-target::after {
  position: absolute;
  content: "";
  background: rgba(199, 247, 90, 0.12);
}

.arena-target::before {
  top: 16px;
  left: -12px;
  width: 58px;
  height: 1px;
}

.arena-target::after {
  top: -12px;
  left: 16px;
  width: 1px;
  height: 58px;
}

.arena-target-left {
  left: 7%;
}

.arena-target-right {
  right: 7%;
}

.stroop-instruction {
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.06em;
}

.stroop-word {
  min-width: 300px;
  margin: 14px 0 15px;
  font-size: clamp(72px, 10vw, 130px);
  letter-spacing: 0.08em;
  line-height: 1;
  text-align: center;
  text-indent: 0.08em;
  text-shadow: 0 0 40px currentColor;
  transition: opacity 100ms ease;
}

.stroop-word.is-switching {
  opacity: 0;
}

.stroop-timer {
  color: #56626c;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.stroop-feedback {
  min-height: 19px;
  margin: 12px 0;
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}

.stroop-feedback.correct {
  color: var(--accent);
}

.stroop-feedback.wrong {
  color: #ff8d87;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.choice-grid button {
  display: flex;
  min-height: 53px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #10151d;
  color: var(--muted-bright);
  cursor: pointer;
  font-size: 11px;
  transition:
    border-color 100ms ease,
    background 100ms ease,
    transform 100ms ease;
}

.choice-grid button:hover:not(:disabled) {
  border-color: var(--line-strong);
  background: #161d26;
  transform: translateY(-1px);
}

.choice-grid button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.stroop-bottom {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 17px;
}

.stroop-finish {
  padding: 23px 0 10px;
  text-align: center;
}

.stroop-finish[hidden] {
  display: none;
}

.finish-kicker {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.15em;
}

.stroop-finish > strong {
  display: block;
  margin: 10px 0 22px;
  font-size: 30px;
}

.finish-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 23px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.finish-metrics div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px;
  border-right: 1px solid var(--line);
}

.finish-metrics div:last-child {
  border: 0;
}

.finish-metrics span {
  color: var(--muted);
  font-size: 9px;
}

.finish-metrics b {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 500;
}

.example-box {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  background: #0b1017;
}

.example-box span {
  color: var(--muted);
  font-size: 9px;
}

.example-box strong {
  margin-left: auto;
  font-size: 29px;
}

.example-box i {
  color: #52606a;
  font-style: normal;
}

.example-box b {
  color: var(--accent);
  font-size: 10px;
}

.site-footer {
  display: flex;
  width: min(1220px, calc(100% - 48px));
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  color: #515c65;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

@media (max-width: 1000px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .main-nav {
    order: 3;
    grid-column: 1 / -1;
    display: none;
  }

  .system-state {
    grid-column: 2;
  }

  .hero {
    grid-template-columns: 1fr 0.8fr;
  }

  .hero-copy {
    padding-left: 25px;
  }

  .hero h1 {
    font-size: clamp(54px, 8vw, 76px);
  }

  .metric-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .metric-intro {
    display: none;
  }

  .mode-grid {
    grid-template-columns: 1fr;
  }

  .mode-card {
    min-height: 0;
  }

  .mode-card {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    align-items: center;
    gap: 16px;
  }

  .mode-number {
    position: absolute;
    top: 18px;
    right: 20px;
  }

  .mode-icon {
    margin: 0;
  }

  .mode-content {
    grid-row: span 2;
  }

  .mode-meta {
    margin: 0;
    padding: 0;
  }

  .mode-arrow {
    display: none;
  }

  .training-layout {
    grid-template-columns: 1fr;
  }

  .instruction-panel {
    display: grid;
    grid-template-columns: 130px 1fr 1fr;
    gap: 20px;
  }

  .instruction-panel .panel-label,
  .instruction-panel h2 {
    grid-column: 1;
  }

  .instruction-panel .panel-label {
    align-self: start;
  }

  .instruction-panel h2 {
    align-self: start;
    margin: 10px 0 0;
  }

  .instruction-panel .instruction-list {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .instruction-panel .tip-box,
  .instruction-panel .scale-legend,
  .instruction-panel .example-box {
    grid-column: 3;
    grid-row: 1 / span 2;
    align-self: center;
    margin: 0;
  }

  .instruction-panel > .button {
    display: none;
  }
}

@media (max-width: 720px) {
  .topbar {
    height: auto;
    min-height: 66px;
    padding: 13px 18px;
  }

  .brand-copy small,
  .system-state {
    display: none;
  }

  .main-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-column: 1 / -1;
    width: 100%;
    margin-top: 5px;
    border-top: 1px solid var(--line);
  }

  .nav-link {
    justify-content: center;
    padding: 12px 4px 9px;
    font-size: 11px;
  }

  .nav-link span {
    display: none;
  }

  .nav-link::after {
    right: 25%;
    left: 25%;
  }

  main,
  .site-footer {
    width: calc(100% - 28px);
  }

  .hero {
    display: flex;
    min-height: 0;
    flex-direction: column;
    padding: 55px 0 45px;
  }

  .hero-copy {
    padding-left: 18px;
  }

  .hero h1 {
    margin-top: 20px;
    font-size: clamp(50px, 14vw, 70px);
  }

  .hero-lead {
    font-size: 13px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .hero-visual {
    width: 78vw;
    margin-top: 35px;
  }

  .metric-strip {
    grid-template-columns: 1fr;
  }

  .metric-item {
    min-height: 82px;
    padding: 17px 19px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric-item:last-child {
    border-bottom: 0;
  }

  .metric-item {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .metric-item strong {
    grid-row: span 2;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }

  .section-heading p {
    text-align: left;
  }

  .modes-section {
    padding: 65px 0 55px;
  }

  .mode-card {
    grid-template-columns: 46px 1fr;
    gap: 14px;
    padding: 20px;
  }

  .mode-icon {
    width: 44px;
    height: 44px;
  }

  .mode-content,
  .mode-meta {
    grid-column: 2;
  }

  .mode-meta {
    margin-top: 2px;
  }

  .protocol-section {
    grid-template-columns: 1fr;
    gap: 35px;
    padding-bottom: 70px;
  }

  .protocol-steps div {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
    padding: 13px 0;
  }

  .page-heading {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 40px;
  }

  .page-heading h1 {
    font-size: 44px;
  }

  .session-badge {
    display: none;
  }

  .training-layout {
    padding-bottom: 65px;
  }

  .test-panel {
    padding: 12px;
  }

  .test-hud,
  .schulte-stats,
  .stroop-hud {
    grid-template-columns: repeat(2, 1fr);
  }

  .hud-item,
  .schulte-stat {
    padding: 11px;
  }

  .hud-item:first-child,
  .schulte-stat:first-child {
    padding-left: 11px;
  }

  .hud-item:nth-child(2),
  .schulte-stat:nth-child(2) {
    border-right: 0;
  }

  .hud-item:nth-child(-n + 2),
  .schulte-stat:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .hud-item.personal {
    text-align: left;
  }

  .reaction-stage {
    min-height: 390px;
  }

  .stage-key-hint {
    right: 50%;
    transform: translateX(50%);
  }

  .round-track {
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
  }

  .round-slot {
    min-height: 39px;
    justify-content: center;
    padding: 0 3px;
  }

  .round-slot span {
    display: none;
  }

  .instruction-panel {
    display: block;
  }

  .instruction-panel h2 {
    margin: 12px 0 20px;
  }

  .instruction-panel .tip-box,
  .instruction-panel .scale-legend,
  .instruction-panel .example-box {
    margin-top: 18px;
  }

  .schulte-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .difficulty-picker button {
    flex: 1;
  }

  .schulte-board-shell {
    width: 100%;
  }

  .schulte-cell {
    font-size: clamp(13px, 6vw, 22px);
  }

  .stroop-card {
    min-height: 0;
  }

  .stroop-arena {
    min-height: 285px;
  }

  .stroop-word {
    min-width: 0;
    font-size: clamp(68px, 24vw, 100px);
  }

  .choice-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .choice-grid button {
    min-height: 49px;
  }

  .finish-metrics {
    grid-template-columns: 1fr;
  }

  .finish-metrics div {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 18px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}