/* ==========================================================================
   LATENT//SPACE — stylesheet
   Design language: deep-space glass, holographic panels, mono labels,
   zone-accent colour carried through HUD, screens and world.
   ========================================================================== */

@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("fonts/SpaceGrotesk-400.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("fonts/JetBrainsMono-400.woff2") format("woff2");
}

:root {
  --bg: #04060d;
  --ink: #eef4ff;
  --ink-dim: rgba(238, 244, 255, 0.64);
  --ink-faint: rgba(238, 244, 255, 0.36);
  --panel: rgba(7, 12, 24, 0.78);
  --panel-strong: rgba(6, 10, 20, 0.94);
  --line: rgba(140, 190, 255, 0.16);
  --line-strong: rgba(140, 190, 255, 0.32);
  --accent: #2fe6ff;
  --good: #4dffc3;
  --bad: #ff4d6d;
  --warn: #ffb347;
  --gold: #ffd166;
  --font-display: "Space Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

#stage-root {
  position: fixed;
  inset: 0;
}

#gl {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ------------------------------------------------------------------ fx */

#fx-vignette,
#fx-flash,
#fx-damage {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 4;
}

#fx-vignette {
  background: radial-gradient(ellipse at center, transparent 46%, rgba(0, 0, 0, 0.55) 100%);
}

#fx-flash {
  opacity: 0;
  transition: opacity 0.12s ease-out;
}
#fx-flash.active {
  opacity: 0.5;
}
#fx-flash.flash-correct {
  background: radial-gradient(circle at 50% 60%, rgba(77, 255, 195, 0.5), transparent 60%);
}
#fx-flash.flash-wrong,
#fx-flash.flash-timeout {
  background: radial-gradient(circle at 50% 55%, rgba(255, 77, 109, 0.45), transparent 62%);
}
#fx-flash.flash-late {
  background: radial-gradient(circle at 50% 60%, rgba(255, 209, 102, 0.35), transparent 60%);
}

#fx-damage {
  opacity: 0;
  background: radial-gradient(ellipse at center, transparent 34%, rgba(255, 20, 60, 0.45) 100%);
}
#fx-damage.active {
  animation: damage-pulse 0.7s ease-out;
}
@keyframes damage-pulse {
  0% {
    opacity: 0.95;
  }
  100% {
    opacity: 0;
  }
}

.float-text {
  position: absolute;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 40px);
  pointer-events: none;
  z-index: 6;
  text-shadow: 0 4px 26px rgba(0, 0, 0, 0.8);
  animation: float-up 1.4s ease-out forwards;
}
.float-points {
  color: var(--good);
}
.float-bad {
  color: var(--bad);
}
@keyframes float-up {
  0% {
    opacity: 0;
    transform: translate(-50%, -40%) scale(0.7);
  }
  18% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.08);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -130%) scale(1);
  }
}

/* ----------------------------------------------------------------- HUD */

#hud {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  user-select: none;
}

#hud button {
  pointer-events: auto;
  font-family: inherit;
  cursor: pointer;
}

.hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: stretch;
  gap: 10px;
  padding: max(10px, env(safe-area-inset-top)) clamp(10px, 2vw, 26px) 0;
}

.hud-block {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 7px 14px 8px;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 96px;
}

.hud-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
}

.hud-score {
  min-width: 148px;
}
#hud-score {
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.hud-streak {
  border-color: rgba(255, 209, 102, 0.35);
  background: linear-gradient(140deg, rgba(255, 209, 102, 0.16), rgba(7, 12, 24, 0.8));
  transition: box-shadow 0.25s ease;
}
.hud-streak.streak-hot {
  box-shadow: 0 0 26px rgba(255, 179, 71, 0.35);
}
.hud-streak.streak-max {
  box-shadow: 0 0 34px rgba(255, 77, 109, 0.5);
  border-color: rgba(255, 77, 109, 0.5);
}
.hud-streak-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
#hud-mult {
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 700;
  color: var(--gold);
}
#hud-streak-count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-dim);
}

.integrity-row {
  display: flex;
  gap: 6px;
  align-items: center;
  min-height: 22px;
}
.integrity-pip {
  width: 18px;
  height: 20px;
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  background: linear-gradient(180deg, #eaf6ff, #7fd6ff);
  box-shadow: 0 0 12px rgba(127, 214, 255, 0.6);
  transition: background 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
}
.integrity-pip.lost {
  background: rgba(255, 255, 255, 0.1);
  box-shadow: none;
  opacity: 0.5;
}
.integrity-pip.hit {
  animation: pip-break 0.5s ease-out;
}
@keyframes pip-break {
  0% {
    transform: scale(1.4) rotate(8deg);
    background: #ff4d6d;
  }
  100% {
    transform: scale(1) rotate(0);
  }
}

.progress-row {
  display: flex;
  gap: 5px;
  align-items: center;
  min-height: 22px;
  max-width: 260px;
  flex-wrap: wrap;
}
.progress-pip {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.14);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}
.progress-pip.pip-current {
  outline: 1px solid rgba(255, 255, 255, 0.6);
  outline-offset: 2px;
}
.pip-correct {
  background: var(--good);
  box-shadow: 0 0 10px rgba(77, 255, 195, 0.65);
}
.pip-wrong {
  background: var(--bad);
  box-shadow: 0 0 10px rgba(255, 77, 109, 0.6);
}
.pip-timeout {
  background: var(--warn);
}

.hud-pause {
  align-self: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.1em;
  backdrop-filter: blur(12px);
}
.hud-pause:hover {
  border-color: var(--line-strong);
}

.hud-meta {
  position: absolute;
  top: clamp(70px, 9vh, 96px);
  left: clamp(10px, 2vw, 26px);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  max-width: 60vw;
}
.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(7, 12, 24, 0.72);
  color: var(--ink-dim);
  backdrop-filter: blur(10px);
}
.tag-zone {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
}
.tag-tier[data-tier="3"],
.tag-tier[data-tier="4"] {
  color: var(--warn);
}
.tag-shape {
  color: var(--ink);
}

/* reticle */
.reticle {
  --lock-dwell: 0;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 54px;
  height: 54px;
  transform: translate(-50%, -50%) scale(1);
  transition: transform 0.18s ease-out;
}
.reticle-ring {
  position: absolute;
  inset: 10px;
  border: 1.5px solid rgba(238, 244, 255, 0.5);
  border-radius: 50%;
  transition: border-color 0.15s ease, inset 0.15s ease;
}
.reticle-ring-outer {
  inset: 0;
  border-style: dashed;
  border-color: rgba(238, 244, 255, 0.18);
  animation: reticle-spin 14s linear infinite;
}
.reticle-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(238, 244, 255, 0.9);
  transform: translate(-50%, -50%);
}
.reticle-tick {
  position: absolute;
  background: rgba(238, 244, 255, 0.55);
}
.reticle-tick-n,
.reticle-tick-s {
  left: 50%;
  width: 1.5px;
  height: 7px;
  transform: translateX(-50%);
}
.reticle-tick-n {
  top: -2px;
}
.reticle-tick-s {
  bottom: -2px;
}
.reticle-tick-e,
.reticle-tick-w {
  top: 50%;
  height: 1.5px;
  width: 7px;
  transform: translateY(-50%);
}
.reticle-tick-e {
  right: -2px;
}
.reticle-tick-w {
  left: -2px;
}
.reticle.locked {
  transform: translate(-50%, -50%) scale(calc(1 + var(--lock-dwell) * 0.35));
}
.reticle.locked .reticle-ring {
  border-color: var(--accent);
  inset: calc(10px - var(--lock-dwell) * 6px);
}
.reticle.streak-reticle .reticle-ring-outer {
  border-color: rgba(255, 209, 102, 0.55);
}
@keyframes reticle-spin {
  to {
    transform: rotate(360deg);
  }
}

.hud-lock {
  position: absolute;
  left: 50%;
  top: calc(50% + 46px);
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--accent);
  background: rgba(4, 8, 18, 0.6);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
#hud-lock-letter {
  font-weight: 600;
}

/* clock — lives in the top bar so the chase camera never occludes it */
.hud-clock {
  position: relative;
  margin-left: auto;
  width: clamp(56px, 6.4vw, 76px);
  height: clamp(56px, 6.4vw, 76px);
  flex: 0 0 auto;
  align-self: center;
}
.hud-clock svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.clock-track {
  fill: rgba(4, 8, 18, 0.55);
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 6;
}
.clock-arc {
  fill: none;
  stroke: var(--accent);
  stroke-width: 6;
  stroke-linecap: round;
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--accent) 70%, transparent));
  transition: stroke 0.2s ease;
}
.hud-clock.urgent .clock-arc {
  stroke: var(--bad);
}
.hud-clock.urgent {
  animation: clock-pulse 0.7s ease-in-out infinite;
}
.hud-clock.frozen .clock-arc {
  stroke: #8fe8ff;
}
@keyframes clock-pulse {
  50% {
    transform: translateX(-50%) scale(1.07);
  }
}
#hud-clock-value {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* feedback */
.hud-feedback {
  position: absolute;
  left: 50%;
  top: 33%;
  transform: translate(-50%, 0);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: none;
}
.hud-feedback.pop {
  animation: feedback-pop 0.5s cubic-bezier(0.2, 1.4, 0.4, 1);
}
.feedback-main {
  font-size: clamp(28px, 4.6vw, 58px);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-shadow: 0 6px 40px rgba(0, 0, 0, 0.75);
}
.feedback-detail {
  font-family: var(--font-mono);
  font-size: clamp(12px, 1.6vw, 17px);
  color: var(--ink-dim);
  letter-spacing: 0.16em;
}
.hud-feedback.good .feedback-main {
  color: var(--good);
}
.hud-feedback.good-hot .feedback-main {
  color: var(--gold);
  text-shadow: 0 0 40px rgba(255, 209, 102, 0.6);
}
.hud-feedback.bad .feedback-main {
  color: var(--bad);
}
.hud-feedback.warn .feedback-main {
  color: var(--warn);
}
.hud-feedback.charge .feedback-main {
  color: var(--accent);
}
@keyframes feedback-pop {
  0% {
    opacity: 0;
    transform: translate(-50%, 14px) scale(0.82);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, 0) scale(1);
  }
}

.hud-order {
  position: absolute;
  left: 50%;
  top: calc(33% + 74px);
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold);
  background: rgba(4, 8, 18, 0.6);
  border: 1px solid rgba(255, 209, 102, 0.35);
  padding: 5px 12px;
  border-radius: 999px;
}
.hud-order.order-complete {
  color: var(--good);
  border-color: rgba(77, 255, 195, 0.5);
}

.hud-coach {
  position: absolute;
  left: 50%;
  top: clamp(146px, 18vh, 196px);
  transform: translateX(-50%);
  max-width: min(620px, 88vw);
  background: var(--panel-strong);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 10px 20px;
  font-size: clamp(13px, 1.5vw, 16px);
  color: var(--ink);
  text-align: center;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

/* bottom cluster */
.hud-bottom {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  padding: 0 clamp(10px, 2vw, 26px) max(12px, env(safe-area-inset-bottom));
  pointer-events: none;
}

.lifelines {
  display: flex;
  gap: 8px;
  pointer-events: auto;
}
.lifeline {
  position: relative;
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  gap: 0 8px;
  align-items: center;
  min-width: 118px;
  padding: 9px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  backdrop-filter: blur(12px);
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.lifeline:hover:not(.spent) {
  border-color: var(--accent);
}
.lifeline:active:not(.spent) {
  transform: translateY(1px);
}
.lifeline.spent {
  opacity: 0.42;
}
.lifeline-glyph {
  grid-row: span 2;
  font-size: 20px;
  color: var(--accent);
}
.lifeline-name {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}
.lifeline-key {
  position: absolute;
  top: 4px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-faint);
}
.lifeline-count {
  font-size: 16px;
  font-weight: 700;
  color: var(--gold);
}

.overclock {
  pointer-events: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  padding: 10px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  backdrop-filter: blur(12px);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.overclock-glyph {
  font-size: 18px;
  color: var(--gold);
}
.overclock-text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}
.overclock-text em {
  font-style: normal;
  color: var(--gold);
}
.overclock-key {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
}
.overclock.active {
  border-color: var(--gold);
  box-shadow: 0 0 28px rgba(255, 209, 102, 0.45);
}
.overclock.unavailable {
  opacity: 0.45;
}
#hud.overclocked #reticle .reticle-ring {
  border-color: var(--gold);
}

.hud-hint {
  position: absolute;
  left: 50%;
  top: clamp(106px, 13vh, 138px);
  transform: translateX(-50%);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  pointer-events: none;
  background: rgba(4, 8, 18, 0.42);
  border-radius: 999px;
  padding: 5px 14px;
  backdrop-filter: blur(6px);
  transition: opacity 0.6s ease;
}
.hud-hint b {
  color: var(--ink-dim);
}

.toasts {
  position: absolute;
  top: clamp(120px, 18vh, 170px);
  right: clamp(10px, 2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: min(300px, 74vw);
}
.toast {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 209, 102, 0.4);
  background: linear-gradient(140deg, rgba(255, 209, 102, 0.14), rgba(6, 10, 20, 0.92));
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateX(18px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.toast.in {
  opacity: 1;
  transform: translateX(0);
}
.toast-glyph {
  font-size: 20px;
  color: var(--gold);
}
.toast-body {
  display: flex;
  flex-direction: column;
}
.toast-body strong {
  font-size: 14px;
}
.toast-body em {
  font-style: normal;
  font-size: 12px;
  color: var(--ink-dim);
}

/* mobile question mirror: only shown on narrow or touch screens */
.hud-question {
  position: absolute;
  left: 50%;
  top: clamp(184px, 24vh, 250px);
  transform: translateX(-50%);
  width: min(560px, 92vw);
  max-height: 34vh;
  overflow-y: auto;
  background: rgba(4, 8, 18, 0.86);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 12px 14px;
  backdrop-filter: blur(14px);
  pointer-events: auto;
  display: none;
}
.hud-question p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.4;
}
.hud-question pre {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: pre-wrap;
  color: #cfe6ff;
  background: rgba(2, 5, 12, 0.9);
  border-radius: 10px;
  padding: 10px;
}
.hud-question ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.mirror-option {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(10, 16, 32, 0.7);
  font-size: 13.5px;
  line-height: 1.35;
  cursor: pointer;
}
.mirror-option:active {
  border-color: var(--accent);
  background: rgba(47, 230, 255, 0.12);
}
.mirror-letter {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
  min-width: 18px;
}
.mirror-order::before {
  content: "HIT THESE IN ORDER";
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

@media (max-width: 820px), (pointer: coarse) {
  .hud-question:not(.hidden) {
    display: block;
  }
}


/* ------------------------------------------------------------- screens */

#screens {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: radial-gradient(ellipse at 50% 30%, rgba(10, 18, 40, 0.72), rgba(2, 4, 10, 0.92));
  backdrop-filter: blur(10px);
}
#screens.empty {
  display: none;
}

.screen {
  width: 100%;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vh, 48px) clamp(12px, 3vw, 40px);
}

.screen-inner {
  width: min(1080px, 100%);
  background: linear-gradient(160deg, rgba(9, 15, 30, 0.92), rgba(4, 7, 16, 0.94));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 4vw, 44px);
  box-shadow: var(--shadow);
  animation: screen-in 0.34s cubic-bezier(0.2, 1, 0.3, 1);
}
@keyframes screen-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.99);
  }
}

.screen-head {
  margin-bottom: clamp(16px, 3vh, 30px);
}
.screen-head h2 {
  margin: 0 0 6px;
  font-size: clamp(24px, 3.6vw, 40px);
  letter-spacing: 0.04em;
}
.screen-head p {
  margin: 0;
  color: var(--ink-dim);
  max-width: 60ch;
}

.kicker,
.eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--accent);
}

/* title */
.title-inner {
  display: grid;
  gap: clamp(20px, 4vh, 40px);
  justify-items: center;
  text-align: center;
  padding: clamp(28px, 6vh, 64px) clamp(20px, 4vw, 56px);
}
.game-title {
  margin: 0;
  font-size: clamp(44px, 10vw, 108px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 0.95;
  background: linear-gradient(180deg, #ffffff 20%, #7fd6ff 70%, #2f7cff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 24px 80px rgba(47, 230, 255, 0.25);
}
.game-tagline {
  margin: 10px 0 0;
  color: var(--ink-dim);
  font-size: clamp(14px, 1.8vw, 18px);
  letter-spacing: 0.04em;
}
.title-menu {
  display: grid;
  gap: 10px;
  width: min(460px, 100%);
}
.title-submenu {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.title-foot {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
}
.best-line b {
  color: var(--gold);
}

/* buttons */
.btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 14px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: rgba(12, 20, 38, 0.85);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.btn em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
  font-weight: 400;
}
.btn-kicker {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--accent);
}
.btn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 24px rgba(47, 230, 255, 0.16);
}
.btn:active {
  transform: translateY(1px);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary {
  background: linear-gradient(150deg, rgba(47, 230, 255, 0.2), rgba(12, 20, 38, 0.9));
  border-color: rgba(47, 230, 255, 0.5);
}
.btn-zone {
  background: linear-gradient(150deg, rgba(160, 107, 255, 0.16), rgba(12, 20, 38, 0.9));
}
.btn-ghost {
  background: transparent;
  font-size: 12px;
  padding: 10px;
  letter-spacing: 0.14em;
  font-family: var(--font-mono);
}
.btn-danger {
  border-color: rgba(255, 77, 109, 0.5);
  color: #ffd7de;
}
.btn-large {
  padding: 18px 20px;
}

.screen-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: clamp(18px, 3vh, 30px);
  justify-content: center;
}

/* zones */
.zone-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.zone-card {
  position: relative;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--zone-soft), rgba(6, 10, 20, 0.92));
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.16s ease, transform 0.12s ease, box-shadow 0.2s ease;
  font-family: var(--font-display);
}
.zone-card:hover:not(.locked) {
  transform: translateY(-2px);
  border-color: var(--zone);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}
.zone-card.selected {
  border-color: var(--zone);
  box-shadow: 0 0 0 1px var(--zone), 0 18px 46px rgba(0, 0, 0, 0.5);
}
.zone-card.locked {
  filter: grayscale(0.9);
  opacity: 0.55;
  cursor: not-allowed;
}
.zone-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--zone);
  letter-spacing: 0.2em;
}
.zone-name {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0.06em;
}
.zone-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-dim);
}
.zone-blurb {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.45;
  margin: 6px 0 8px;
}
.zone-progress {
  display: flex;
  gap: 4px;
  margin-bottom: 6px;
}
.zone-progress i {
  width: 22px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.14);
}
.zone-progress i.on {
  background: var(--zone);
  box-shadow: 0 0 10px var(--zone);
}
.zone-best {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

/* difficulty */
.difficulty-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.tier-card {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(8, 13, 26, 0.8);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--font-display);
  transition: border-color 0.15s ease;
}
.tier-card.selected {
  border-color: var(--accent);
  background: rgba(47, 230, 255, 0.08);
}
.tier-name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
}
.tier-blurb {
  font-size: 12px;
  color: var(--ink-dim);
}
.tier-stats {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-faint);
}

/* stage beat */
.stage-inner {
  text-align: center;
  display: grid;
  gap: 10px;
  justify-items: center;
  padding: clamp(32px, 8vh, 80px) clamp(20px, 4vw, 56px);
}
.stage-title {
  margin: 0;
  font-size: clamp(36px, 7vw, 72px);
  letter-spacing: 0.06em;
  color: var(--zone, var(--accent));
  text-shadow: 0 0 60px color-mix(in srgb, var(--zone, var(--accent)) 45%, transparent);
}
.stage-sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
}
.stage-body {
  margin: 0;
  max-width: 52ch;
  color: var(--ink-dim);
  line-height: 1.5;
}
.stage-meta {
  display: flex;
  gap: 10px;
  margin: 8px 0 16px;
}
.stage-meta span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-dim);
}
.wait {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
  animation: blink 1.2s ease-in-out infinite;
}
@keyframes blink {
  50% {
    opacity: 0.3;
  }
}

/* pause */
.facts {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.fact {
  flex: 1;
  min-width: 120px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(8, 13, 26, 0.7);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.fact span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
}
.fact b {
  font-size: clamp(18px, 2.4vw, 26px);
}

/* results */
.results-inner {
  border-color: color-mix(in srgb, var(--zone) 30%, var(--line));
}
.results-head {
  text-align: center;
  margin-bottom: clamp(16px, 3vh, 28px);
}
.results-head h2 {
  margin: 4px 0 6px;
  font-size: clamp(44px, 8vw, 84px);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--zone);
  text-shadow: 0 0 50px color-mix(in srgb, var(--zone) 40%, transparent);
}
.results-sub {
  margin: 0;
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.results-highlight {
  margin: 10px 0 0;
  color: var(--gold);
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  font-size: 13px;
}
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}
.results-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(8, 13, 26, 0.66);
}
.results-panel h3,
.review h3,
.settings-sub {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-faint);
}
.ledger {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.ledger li {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--ink-dim);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
  padding-bottom: 5px;
}
.ledger b {
  color: var(--good);
  font-variant-numeric: tabular-nums;
}
.ledger b.neg {
  color: var(--bad);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.badge {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 209, 102, 0.4);
  color: var(--gold);
  background: rgba(255, 209, 102, 0.08);
}
.badge i {
  font-style: normal;
}

.review {
  margin-top: 18px;
}
.review-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 13, 26, 0.6);
  margin-bottom: 8px;
  overflow: hidden;
}
.review-item.correct {
  border-left: 3px solid var(--good);
}
.review-item.wrong {
  border-left: 3px solid var(--bad);
}
.review-item.timeout {
  border-left: 3px solid var(--warn);
}
.review-item summary {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}
.review-item summary::-webkit-details-marker {
  display: none;
}
.review-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
}
.review-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
}
.review-item.correct .review-badge {
  color: var(--good);
  border-color: rgba(77, 255, 195, 0.4);
}
.review-item.wrong .review-badge {
  color: var(--bad);
  border-color: rgba(255, 77, 109, 0.4);
}
.review-item.timeout .review-badge {
  color: var(--warn);
  border-color: rgba(255, 179, 71, 0.4);
}
.review-prompt {
  font-size: 14px;
  color: var(--ink-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.review-points {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
}
.review-body {
  padding: 4px 16px 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.07);
}
.review-topic {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  margin: 10px 0 6px;
}
.review-q {
  font-size: 15px;
  margin: 0 0 10px;
}
.review-code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(2, 5, 12, 0.9);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  overflow-x: auto;
  white-space: pre;
  margin: 0 0 10px;
}
.review-answer {
  margin: 0 0 6px;
}
.review-answer b {
  color: var(--good);
}
.review-why {
  margin: 0;
  color: var(--ink-dim);
  line-height: 1.55;
  font-size: 14px;
}
.review.empty p {
  color: var(--ink-dim);
}

/* badges screen */
.badge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px;
}
.badge-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: rgba(8, 13, 26, 0.6);
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0.6;
}
.badge-card.earned {
  opacity: 1;
  border-color: rgba(255, 209, 102, 0.42);
  background: linear-gradient(150deg, rgba(255, 209, 102, 0.1), rgba(8, 13, 26, 0.7));
}
.badge-glyph {
  font-size: 22px;
  color: var(--gold);
}
.badge-name {
  font-weight: 600;
  letter-spacing: 0.04em;
}
.badge-desc {
  font-size: 12px;
  color: var(--ink-dim);
}
.badge-date {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-faint);
  letter-spacing: 0.14em;
}

/* leaderboard */
.leaderboard {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.leaderboard th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
.leaderboard td {
  padding: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--ink-dim);
}
.leaderboard .rank {
  color: var(--ink-faint);
  font-family: var(--font-mono);
}
.leaderboard .score {
  color: var(--gold);
  font-weight: 700;
}
.empty-state {
  text-align: center;
  padding: 40px 0;
  color: var(--ink-dim);
}

/* settings */
.settings-list {
  display: grid;
  gap: 8px;
}
.setting {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 13, 26, 0.6);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}
.setting-button {
  cursor: pointer;
  text-align: left;
  width: 100%;
}
.setting-button b {
  color: var(--accent);
}
.setting input[type="range"] {
  width: min(240px, 40vw);
  accent-color: var(--accent);
}
.setting output {
  font-family: var(--font-mono);
  color: var(--ink-dim);
  min-width: 48px;
  text-align: right;
}

/* coach */
.coach-inner {
  text-align: center;
  display: grid;
  gap: 12px;
  justify-items: center;
}
.coach-inner h2 {
  margin: 0;
  font-size: clamp(32px, 6vw, 58px);
  letter-spacing: 0.06em;
}
.coach-body {
  max-width: 48ch;
  color: var(--ink-dim);
}
.coach-legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-dim);
}
.coach-legend span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
}

/* help */
.help-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
}
.help-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(8, 13, 26, 0.6);
}
.help-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
}
.help-card p {
  margin: 0 0 8px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-dim);
}
.help-card b {
  color: var(--ink);
}

/* touch controls */
.touch-controls {
  position: absolute;
  inset: 0;
  z-index: 7;
  pointer-events: none;
}
.touch-stick {
  position: absolute;
  left: max(18px, env(safe-area-inset-left));
  bottom: max(24px, env(safe-area-inset-bottom));
  width: 132px;
  height: 132px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  background: rgba(8, 13, 26, 0.4);
  pointer-events: auto;
  touch-action: none;
  backdrop-filter: blur(6px);
}
.touch-stick-knob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 56px;
  height: 56px;
  margin: -28px 0 0 -28px;
  border-radius: 50%;
  background: rgba(47, 230, 255, 0.28);
  border: 1.5px solid rgba(47, 230, 255, 0.7);
  transition: transform 0.06s linear;
}
.touch-fire {
  position: absolute;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(34px, env(safe-area-inset-bottom));
  width: 92px;
  height: 92px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  background: rgba(47, 230, 255, 0.16);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  pointer-events: auto;
  touch-action: none;
  backdrop-filter: blur(8px);
}
.touch-fire:active {
  background: rgba(47, 230, 255, 0.4);
}
.touch-overclock {
  position: absolute;
  right: max(34px, env(safe-area-inset-right));
  bottom: calc(max(34px, env(safe-area-inset-bottom)) + 108px);
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 209, 102, 0.5);
  background: rgba(255, 209, 102, 0.14);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 15px;
  pointer-events: auto;
  backdrop-filter: blur(8px);
}
.touch-pause {
  position: absolute;
  right: max(14px, env(safe-area-inset-right));
  top: max(14px, env(safe-area-inset-top));
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(8, 13, 26, 0.6);
  color: var(--ink);
  font-family: var(--font-mono);
  pointer-events: auto;
}

.noscript {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 40px;
  text-align: center;
  z-index: 20;
  background: var(--bg);
  color: var(--ink);
}

/* ------------------------------------------------------- responsive */

@media (max-width: 900px) {
  .hud-meta {
    top: auto;
    bottom: clamp(150px, 24vh, 210px);
    max-width: 86vw;
  }
  .hud-score {
    min-width: 112px;
  }
  .hud-progress,
  .hud-integrity {
    min-width: 84px;
  }
  .title-submenu {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .hud-top {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 6px;
    padding: max(8px, env(safe-area-inset-top)) 124px 0 8px;
  }
  .hud-block {
    padding: 6px 10px 7px;
    min-width: 0;
  }
  .hud-progress {
    display: none;
  }
  .hud-clock {
    position: absolute;
    top: max(8px, env(safe-area-inset-top));
    right: 62px;
    margin-left: 0;
    width: 52px;
    height: 52px;
  }
  .hud-pause {
    position: absolute;
    top: max(8px, env(safe-area-inset-top));
    right: 8px;
    width: 46px;
    height: 52px;
  }
  .hud-meta {
    left: 8px;
    right: 8px;
    top: clamp(74px, 11vh, 104px);
    max-width: 92vw;
    gap: 4px;
  }
  .hud-question {
    top: clamp(108px, 15vh, 150px);
    max-height: 33vh;
    padding: 10px 12px;
    width: min(560px, 94vw);
  }
  .hud-question p {
    font-size: 13.5px;
  }
  .mirror-option {
    padding: 6px 8px;
    font-size: 12.5px;
  }
  .tag {
    font-size: 10px;
    padding: 4px 8px;
  }
  .lifelines {
    gap: 5px;
  }
  .lifeline {
    min-width: 0;
    grid-template-columns: auto auto;
    padding: 8px;
  }
  .lifeline-name {
    display: none;
  }
  .lifeline-key {
    display: none;
  }
  .lifeline-glyph {
    font-size: 18px;
  }
  .overclock-key {
    display: none;
  }
  .hud-hint {
    display: none;
  }
  .hud-clock {
    width: 54px;
    height: 54px;
  }
  .hud-feedback {
    top: 22%;
  }
  .hud-coach {
    top: 44vh;
    font-size: 12px;
  }
  .toasts {
    top: auto;
    bottom: clamp(150px, 26vh, 220px);
    right: 8px;
  }
  .tag-shape {
    display: none;
  }
  .lifelines {
    position: absolute;
    left: 50%;
    bottom: clamp(178px, 24vh, 220px);
    transform: translateX(-50%);
  }
  .lifeline {
    min-width: 64px;
    padding: 7px 9px;
  }
  .hud-bottom {
    justify-content: space-between;
  }
  .title-inner {
    padding: 22px 14px;
  }
  .screen-actions .btn {
    flex: 1 1 100%;
  }
  .review-item summary {
    grid-template-columns: auto 1fr auto;
  }
  .review-prompt {
    white-space: normal;
    font-size: 13px;
  }
  .review-badge {
    display: none;
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  .hud-meta {
    display: none;
  }
  .hud-hint {
    display: none;
  }
  .hud-clock {
    width: 48px;
    height: 48px;
  }
  .hud-coach {
    top: 74px;
  }
  .screen-inner {
    padding: 18px;
  }
}

/* --------------------------------------------------- reduced motion */

.reduced-motion *,
@media (prefers-reduced-motion: reduce) {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
}

.reduced-motion .reticle-ring-outer {
  animation: none;
}
.reduced-motion .clock-pulse,
.reduced-motion .hud-clock.urgent {
  animation: none;
}

/* ---------------------------------------------------- touch-first layout
   On coarse-pointer devices the on-screen controls own the bottom corners, so
   the HUD lifelines move to a centred row (with comfortable 46px targets) and
   the duplicate desktop overclock/pause buttons step aside. Landscape phones
   put the lifeline row between the stick and the fire button. */
@media (pointer: coarse) {
  .title-submenu .btn-ghost {
    min-height: 46px;
  }
  /* Reserve the top-right corner for the touch clock + pause pair. */
  .hud-top {
    padding-right: 118px;
  }
  .hud-clock {
    position: absolute;
    top: max(6px, env(safe-area-inset-top));
    right: 62px;
    margin-left: 0;
    width: 48px;
    height: 48px;
  }
  .lifelines {
    position: absolute;
    left: 50%;
    bottom: clamp(232px, 30vh, 286px);
    transform: translateX(-50%);
    gap: 8px;
  }
  .lifeline {
    min-height: 46px;
    min-width: 74px;
  }
  .mirror-option {
    min-height: 44px;
    align-items: center;
  }
  #hud-overclock,
  #hud-pause {
    display: none;
  }
}

@media (pointer: coarse) and (orientation: landscape) {
  .lifelines {
    bottom: 10px;
    gap: 6px;
  }
  .lifeline {
    min-width: 66px;
  }
}