:root {
  --bg: #090511;
  --bg-secondary: rgba(18, 11, 30, 0.78);
  --panel: rgba(23, 14, 38, 0.82);
  --panel-strong: rgba(33, 21, 54, 0.92);
  --border: rgba(188, 140, 255, 0.18);
  --text: #ece6e6;
  --muted: #b6a7cd;
  --purple-1: #9f5cff;
  --purple-2: #6f2cff;
  --purple-3: #c98fff;
  --correct: #63e6be;
  --present: #ffd166;
  --absent: #54456f;
  --danger: #ff7aa2;
  --shadow: 0 24px 70px rgba(86, 28, 140, 0.35);
  --tile-size: min(12vw, 4.4rem);
  --tile-gap: min(1.8vw, 0.75rem);
  --round-tile-scale: 1;
  --round-gap-scale: 1;
  --board-stage-cols: 7;
  --board-stage-rows: 7;
  --keyboard-key: 4rem;
  --shell-padding: 1.25rem;
  --panel-gap: 1.1rem;
  --panel-radius: 1.6rem;
  --topbar-padding: 1.35rem;
  --board-padding: 1.1rem;
  --keyboard-padding: 1rem;
  --keyboard-row-gap: 0.55rem;
  --keyboard-key-gap: 0.45rem;
  --key-height: 3rem;
  --key-font-size: 1rem;
  --key-wide-multiplier: 1.5;
  --keyboard-scale: 1;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

html,
body,
button,
.game,
.game * {
  -webkit-user-select: none;
  user-select: none;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at 50% 0%, rgba(145, 77, 255, 0.12), transparent 38%),
    radial-gradient(circle at 15% 35%, rgba(101, 42, 184, 0.08), transparent 30%),
    radial-gradient(circle at 85% 75%, rgba(88, 31, 168, 0.08), transparent 28%),
    linear-gradient(180deg, #0b0714 0%, #07040d 100%);
  color: var(--text);
  font-family: "Bahnschrift", "Segoe UI Variable Display", "Segoe UI", sans-serif;
}

body {
  overflow-x: hidden;
}

body.modal-open {
  overflow: hidden;
}

body.reduced-motion *,
body.reduced-motion *::before,
body.reduced-motion *::after {
  animation-duration: 0.01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.01ms !important;
  scroll-behavior: auto !important;
}

body.high-contrast {
  --text: #fffaff;
  --muted: #ddd0f3;
  --border: rgba(227, 197, 255, 0.3);
}

body.large-keyboard {
  --keyboard-padding: 1.1rem;
}

button,
input {
  font: inherit;
}

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

.app-shell {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  padding:
    calc(var(--shell-padding) + var(--safe-top))
    var(--shell-padding)
    calc(var(--shell-padding) + var(--safe-bottom));
  display: grid;
  align-items: start;
  justify-items: center;
  isolation: isolate;
  overflow: hidden;
}

.fx-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 40;
}

.particle {
  position: absolute;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  opacity: 0;
  animation: particleBurst 680ms ease-out forwards;
}

.particle.correct {
  background: var(--correct);
  box-shadow: 0 0 14px rgba(99, 230, 190, 0.7);
}

.particle.present {
  background: var(--present);
  box-shadow: 0 0 14px rgba(255, 209, 102, 0.7);
}

.particle.type {
  background: var(--purple-3);
  box-shadow: 0 0 12px rgba(201, 143, 255, 0.7);
}

.particle.confetti {
  width: 0.7rem;
  height: 0.95rem;
  border-radius: 0.18rem;
  box-shadow: none;
}

.background-glow {
  position: absolute;
  inset: auto;
  width: min(32vw, 16rem);
  height: min(32vw, 16rem);
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.16;
  pointer-events: none;
  z-index: -1;
  animation: floatGlow 8s ease-in-out infinite alternate;
}

.background-glow-left {
  top: 2rem;
  left: -2rem;
  background: rgba(159, 92, 255, 0.2);
}

.background-glow-right {
  right: -2rem;
  bottom: 12%;
  background: rgba(111, 44, 255, 0.18);
  animation-delay: 1.4s;
}

.background-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(8px);
  opacity: 0.22;
  z-index: -1;
  animation: driftOrb 18s ease-in-out infinite;
  will-change: transform, opacity;
}

.orb-one {
  width: 6rem;
  height: 6rem;
  top: 22%;
  left: 8%;
  background: radial-gradient(circle, rgba(201, 143, 255, 0.7), transparent 70%);
}

.orb-two {
  width: 9rem;
  height: 9rem;
  right: 10%;
  top: 38%;
  background: radial-gradient(circle, rgba(111, 44, 255, 0.55), transparent 72%);
  animation-delay: 3s;
}

.orb-three {
  width: 7rem;
  height: 7rem;
  left: 24%;
  bottom: 12%;
  background: radial-gradient(circle, rgba(99, 230, 190, 0.28), transparent 72%);
  animation-delay: 6s;
}

.game {
  width: min(100%, 58rem);
  display: grid;
  gap: var(--panel-gap);
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  align-content: start;
}

.game.final-guess .board-panel,
.game.final-guess .keyboard-panel {
  box-shadow: 0 0 0 1px rgba(255, 122, 162, 0.2), 0 24px 70px rgba(140, 28, 75, 0.3);
}

.game.final-guess .message {
  color: #ff98b4;
}

.game.input-active .board-row.current-row .tile {
  box-shadow: 0 0 0 1px rgba(201, 143, 255, 0.28), 0 0 20px rgba(159, 92, 255, 0.12);
}

.topbar,
.brand-panel,
.control-panel,
.board-panel,
.keyboard-panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--panel-radius);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.brand-panel {
  padding: 0.4rem 0 0.25rem;
  background: transparent;
  border: 0;
  box-shadow: none;
  backdrop-filter: none;
}

.topbar {
  padding: var(--topbar-padding);
  display: grid;
  gap: 1rem;
}

.brand-block {
  display: grid;
  justify-items: center;
  text-align: center;
}

.control-panel {
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
}

.control-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--purple-3);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.brand-block h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 0.95;
}

.brand-logo {
  display: block;
  width: min(100%, 10rem);
  height: auto;
  margin: 0 auto;
  -webkit-user-drag: none;
  pointer-events: none;
}

.subtitle {
  margin: 0.45rem 0 0;
  color: var(--muted);
  max-width: 34rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.chip {
  padding: 0.9rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(159, 92, 255, 0.1));
  border: 1px solid rgba(215, 184, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.chip.bump {
  animation: chipBump 420ms ease;
}

.chip.streak-live {
  box-shadow: 0 0 0 1px rgba(125, 255, 184, 0.26), 0 0 20px rgba(125, 255, 184, 0.18);
  animation: streakAura 2.8s ease-in-out infinite;
}

.chip-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.chip strong {
  font-size: 1.15rem;
}

.board-panel {
  padding: var(--board-padding);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 0.7rem;
}

.message {
  min-height: 1.5rem;
  color: var(--purple-3);
  font-weight: 500;
  text-align: center;
}

.message.error {
  color: var(--danger);
}

.message.success {
  color: var(--correct);
}

.ghost-button {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.ghost-button:hover,
.ghost-button:focus-visible {
  transform: translateY(-1px);
  background: rgba(159, 92, 255, 0.12);
  border-color: rgba(201, 143, 255, 0.42);
}

.mode-chip {
  min-width: 7rem;
  width: auto;
  justify-self: end;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--mode-color, rgba(159, 92, 255, 0.18)) 26%, rgba(255, 255, 255, 0.08)), rgba(255, 255, 255, 0.04));
  border-color: color-mix(in srgb, var(--mode-color, rgba(159, 92, 255, 0.32)) 55%, rgba(255, 255, 255, 0.12));
  box-shadow: 0 0 24px color-mix(in srgb, var(--mode-color, rgba(159, 92, 255, 0.28)) 35%, transparent);
  transition: background 260ms ease, border-color 260ms ease, box-shadow 260ms ease, transform 260ms ease;
}

.mode-chip .chip-label,
.mode-chip strong {
  transition: color 260ms ease;
}

.mode-chip .chip-label {
  color: color-mix(in srgb, var(--mode-color, #c98fff) 58%, #f7eeff);
}

.mode-chip strong {
  color: color-mix(in srgb, var(--mode-color, #f7eeff) 72%, #ffffff);
}

.mode-chip.shift {
  animation: modeShift 420ms ease;
}

.mode-chip.pulsing {
  animation: modePulse 2.2s ease-in-out infinite;
}

.sound-button.sound-on {
  color: #7dffb8;
  border-color: rgba(125, 255, 184, 0.26);
}

.keyboard-hidden .keyboard-panel {
  display: none;
}

.board {
  display: grid;
  gap: calc(var(--tile-gap) * var(--round-gap-scale));
  justify-content: center;
  align-content: center;
  width: min(
    100%,
    calc(
      (var(--tile-size) * var(--board-stage-cols)) +
      (var(--tile-gap) * (var(--board-stage-cols) - 1))
    )
  );
  min-height: calc(
    (var(--tile-size) * var(--board-stage-rows)) +
    (var(--tile-gap) * (var(--board-stage-rows) - 1))
  );
  height: calc(
    (var(--tile-size) * var(--board-stage-rows)) +
    (var(--tile-gap) * (var(--board-stage-rows) - 1))
  );
  max-width: 100%;
  padding: 0.25rem 0 0.5rem;
  margin: 0 auto;
  animation: boardIntro 320ms ease;
}

.board-row {
  display: grid;
  grid-template-columns: repeat(var(--board-cols, 5), calc(var(--tile-size) * var(--round-tile-scale)));
  gap: calc(var(--tile-gap) * var(--round-gap-scale));
  justify-self: center;
}

.board-row.current-row {
  position: relative;
}

.board-row.current-row::before {
  content: "";
  position: absolute;
  left: -0.4rem;
  right: -0.4rem;
  top: 50%;
  height: 0.5rem;
  transform: translateY(-50%);
  background: linear-gradient(90deg, transparent, rgba(201, 143, 255, 0.16), transparent);
  opacity: 0;
  pointer-events: none;
}

.game.input-active .board-row.current-row::before {
  opacity: 1;
  animation: inputTrail 700ms ease;
}

.board-row.perfect {
  position: relative;
}

.board-row.perfect::after {
  content: "";
  position: absolute;
  inset: -0.25rem;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.48), transparent);
  transform: translateX(-120%);
  opacity: 0;
  animation: energySweep 900ms ease;
  pointer-events: none;
  z-index: 2;
}

.board-row.locking .tile {
  animation: lockRow 220ms ease;
}

.board-row.settled {
  opacity: 0.9;
}

.board-row.settled .tile:not(.correct):not(.present):not(.absent) {
  filter: saturate(0.88) brightness(0.92);
}

.tile {
  width: calc(var(--tile-size) * var(--round-tile-scale));
  height: calc(var(--tile-size) * var(--round-tile-scale));
  border-radius: 1rem;
  border: 1px solid rgba(223, 198, 255, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(16, 9, 28, 0.85)),
    linear-gradient(135deg, rgba(159, 92, 255, 0.06), rgba(255, 255, 255, 0));
  display: grid;
  place-items: center;
  font-weight: 700;
  text-transform: uppercase;
  font-size: clamp(1.1rem, 4vw, 1.8rem);
  letter-spacing: 0.08em;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.tile.filled {
  border-color: rgba(201, 143, 255, 0.65);
  box-shadow: 0 0 0 1px rgba(159, 92, 255, 0.25), 0 0 30px rgba(159, 92, 255, 0.14);
  animation: pulseIn 150ms ease;
}

.tile.flip {
  animation: flipTile 650ms ease forwards;
}

.tile.correct,
.key.correct {
  background: linear-gradient(180deg, rgba(99, 230, 190, 0.9), rgba(45, 163, 124, 0.95));
  border-color: rgba(152, 255, 215, 0.6);
  color: #04110d;
  box-shadow: 0 0 30px rgba(99, 230, 190, 0.28);
}

.tile.present,
.key.present {
  background: linear-gradient(180deg, rgba(255, 209, 102, 0.95), rgba(214, 142, 14, 0.95));
  border-color: rgba(255, 226, 145, 0.65);
  color: #241300;
  box-shadow: 0 0 30px rgba(255, 209, 102, 0.24);
}

.tile.absent,
.key.absent {
  background: linear-gradient(180deg, rgba(84, 69, 111, 0.9), rgba(49, 40, 69, 0.95));
  border-color: rgba(129, 111, 161, 0.36);
  color: rgba(255, 255, 255, 0.82);
}

.tile.pop {
  animation: popWin 380ms ease;
}

.tile.sparkle {
  animation: sparkleTile 500ms ease;
}

.tile.shake {
  animation: shakeRow 350ms ease;
}

.legend {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.15rem;
  width: 100%;
  text-align: center;
}

.legend-dot {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  margin-right: 0.35rem;
  vertical-align: middle;
}

.legend-dot.correct {
  background: var(--correct);
}

.legend-dot.present {
  background: var(--present);
}

.legend-dot.absent {
  background: var(--absent);
}

.keyboard-panel {
  padding: var(--keyboard-padding);
  display: grid;
  justify-items: center;
}

.modal.hidden,
.hint-panel.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 3, 12, 0.74);
  backdrop-filter: blur(10px);
}

.modal-card {
  position: relative;
  width: min(100%, 32rem);
  max-height: min(90dvh, 42rem);
  overflow: auto;
  padding: 1.2rem;
  border-radius: 1.4rem;
  border: 1px solid rgba(201, 143, 255, 0.2);
  background:
    linear-gradient(180deg, rgba(36, 20, 58, 0.98), rgba(18, 10, 31, 0.98));
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
  animation: modalRise 260ms ease;
}

.modal-close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  border: 0;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  cursor: pointer;
}

.modal-eyebrow {
  margin: 0 0 0.35rem;
  color: var(--purple-3);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.modal-card h2,
.how-to-play h3 {
  margin: 0;
}

.modal-card h2 {
  margin-bottom: 1rem;
}

.modal-legend {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1rem;
  color: var(--muted);
}

.hint-button {
  width: 100%;
  margin-bottom: 0.8rem;
}

.hint-button.available {
  color: #7dffb8;
  border-color: rgba(125, 255, 184, 0.28);
  background: rgba(41, 110, 76, 0.22);
}

.hint-button.used {
  color: #ff8aa8;
  border-color: rgba(255, 138, 168, 0.26);
  background: rgba(120, 37, 61, 0.22);
}

.hint-panel,
.how-to-play {
  border: 1px solid rgba(201, 143, 255, 0.14);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.9rem;
}

.hint-panel {
  margin-bottom: 0.85rem;
}

.hint-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.55rem;
}

.hint-scroll {
  max-height: 9rem;
  overflow: auto;
  color: var(--muted);
  scrollbar-width: thin;
  scrollbar-color: rgba(201, 143, 255, 0.55) rgba(255, 255, 255, 0.06);
}

.hint-accent {
  color: #7dffb8;
  font-weight: 700;
}

.hint-scroll::-webkit-scrollbar {
  width: 0.7rem;
}

.hint-scroll::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 999px;
}

.hint-scroll::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(201, 143, 255, 0.8), rgba(111, 44, 255, 0.8));
  border-radius: 999px;
  border: 2px solid rgba(24, 12, 40, 0.95);
}

.hint-scroll::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(220, 174, 255, 0.92), rgba(132, 64, 255, 0.92));
}

.hint-scroll p {
  position: relative;
  margin: 0 0 0.7rem;
  padding-left: 1.1rem;
}

.hint-scroll p:last-child {
  margin-bottom: 0;
}

.hint-scroll p::before {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: 0;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: rgba(201, 143, 255, 0.9);
  box-shadow: 0 0 10px rgba(159, 92, 255, 0.45);
}

#hint-text {
  padding-left: 0;
}

#hint-text::before,
#hint-text::after {
  content: none;
}

.hint-list {
  display: grid;
  gap: 0.7rem;
  justify-items: center;
  text-align: center;
}

.hint-line {
  position: relative;
  padding: 0 1.2rem;
  color: var(--muted);
}

.hint-line::before {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: 0;
  width: 0.52rem;
  height: 0.52rem;
  border-radius: 50%;
  background: rgba(125, 255, 184, 0.95);
  box-shadow: 0 0 12px rgba(125, 255, 184, 0.45);
}

.hint-line::after {
  content: "";
  position: absolute;
  top: 0.45rem;
  right: 0;
  width: 0.52rem;
  height: 0.52rem;
  border-radius: 50%;
  background: rgba(125, 255, 184, 0.95);
  box-shadow: 0 0 12px rgba(125, 255, 184, 0.45);
}

.hint-list p::before,
.hint-list p::after,
.hint-line p::before,
.hint-line p::after {
  content: none;
}

.settings-list {
  display: grid;
  gap: 0.75rem;
}

.help-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.help-tab {
  border: 1px solid rgba(201, 143, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.8rem 1rem;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.help-tab.active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(124, 79, 255, 0.28), rgba(159, 92, 255, 0.18));
  border-color: rgba(201, 143, 255, 0.38);
}

.help-tab:hover,
.help-tab:focus-visible {
  transform: translateY(-1px);
}

.help-carousel {
  overflow: hidden;
}

.help-track {
  display: flex;
  width: 200%;
  transition: transform 280ms ease;
}

.help-track.show-controls {
  transform: translateX(-50%);
}

.help-slide {
  width: 50%;
  flex: 0 0 50%;
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(201, 143, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
}

body.high-contrast .setting-item,
body.high-contrast .how-to-play,
body.high-contrast .hint-panel,
body.high-contrast .modal-card {
  border-color: rgba(227, 197, 255, 0.3);
}

.setting-item strong,
.setting-item small {
  display: block;
}

.setting-item small {
  margin-top: 0.2rem;
  color: var(--muted);
}

.setting-toggle {
  appearance: none;
  width: 3.8rem;
  height: 2.15rem;
  border-radius: 999px;
  background: rgba(96, 96, 112, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  position: relative;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  flex: 0 0 auto;
  display: inline-block;
  vertical-align: middle;
}

.setting-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0.22rem;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 50%;
  background: #f7eeff;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.28);
  transform: translateY(-50%);
  transition: transform 160ms ease, background 160ms ease;
}

.setting-toggle:checked {
  background: rgba(124, 79, 255, 0.92);
  border-color: rgba(201, 143, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(124, 79, 255, 0.14);
}

.setting-toggle:checked::after {
  transform: translate(1.6rem, -50%);
}

.setting-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(201, 143, 255, 0.18);
}

.keyboard {
  display: grid;
  gap: var(--keyboard-row-gap);
  width: 100%;
  justify-items: center;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  gap: var(--keyboard-key-gap);
}

.key {
  width: var(--keyboard-key);
  min-width: var(--keyboard-key);
  height: var(--key-height);
  padding: 0;
  border: 0;
  border-radius: 0.95rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(68, 43, 104, 0.9));
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: var(--key-font-size);
  line-height: 1;
  text-transform: uppercase;
  transition: transform 140ms ease, filter 140ms ease, box-shadow 140ms ease;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.06);
}

.key:hover,
.key:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.key:focus,
.key:focus-visible {
  outline: none;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.06);
}

.key:active {
  transform: translateY(1px) scale(0.98);
}

.key.ripple-host {
  isolation: isolate;
}

.key-ripple {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
  transform: translate(-50%, -50%) scale(0);
  animation: keyRipple 520ms ease-out forwards;
  pointer-events: none;
  z-index: -1;
}

.key.large {
  width: calc(var(--keyboard-key) * var(--key-wide-multiplier));
  min-width: calc(var(--keyboard-key) * var(--key-wide-multiplier));
  font-size: calc(var(--key-font-size) * 0.72);
}

@keyframes floatGlow {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(0, 1.8rem, 0) scale(1.12);
  }
}

@keyframes pulseIn {
  0% {
    transform: scale(0.88);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes flipTile {
  0% {
    transform: rotateX(0deg);
  }
  45% {
    transform: rotateX(90deg);
  }
  55% {
    transform: rotateX(90deg);
  }
  100% {
    transform: rotateX(0deg);
  }
}

@keyframes shakeRow {
  20% {
    transform: translateX(-6px);
  }
  40% {
    transform: translateX(6px);
  }
  60% {
    transform: translateX(-4px);
  }
  80% {
    transform: translateX(4px);
  }
}

@keyframes popWin {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.12);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes particleBurst {
  0% {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(0.6);
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--dx), var(--dy), 0) scale(1.2);
  }
}

@keyframes driftOrb {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  33% {
    transform: translate3d(1.5rem, -1rem, 0) scale(1.12);
  }
  66% {
    transform: translate3d(-1rem, 1.2rem, 0) scale(0.96);
  }
  100% {
    transform: translate3d(1.5rem, -1rem, 0) scale(1.12);
  }
}

@keyframes boardIntro {
  0% {
    opacity: 0;
    transform: translateY(14px) scale(0.985);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes keyRipple {
  0% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(0);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(6);
  }
}

@keyframes modalRise {
  0% {
    opacity: 0;
    transform: translateY(16px) scale(0.985);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes energySweep {
  0% {
    opacity: 0;
    transform: translateX(-120%);
  }
  20% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateX(120%);
  }
}

@keyframes chipBump {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes modeShift {
  0% {
    transform: scale(0.96);
    filter: brightness(0.96);
  }
  45% {
    transform: scale(1.05);
    filter: brightness(1.1);
  }
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
}

@keyframes sparkleTile {
  0% {
    filter: brightness(1);
  }
  40% {
    filter: brightness(1.2);
  }
  100% {
    filter: brightness(1);
  }
}

@keyframes streakAura {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 1px rgba(125, 255, 184, 0.26), 0 0 18px rgba(125, 255, 184, 0.14);
  }
  50% {
    transform: scale(1.02);
    box-shadow: 0 0 0 1px rgba(125, 255, 184, 0.34), 0 0 26px rgba(125, 255, 184, 0.22);
  }
}

@keyframes modePulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 24px color-mix(in srgb, var(--mode-color, rgba(159, 92, 255, 0.28)) 35%, transparent);
  }
  50% {
    transform: scale(1.03);
    box-shadow: 0 0 32px color-mix(in srgb, var(--mode-color, rgba(159, 92, 255, 0.4)) 44%, transparent);
  }
}

@keyframes inputTrail {
  0% {
    opacity: 0;
    transform: translateY(-50%) scaleX(0.7);
  }
  35% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(-50%) scaleX(1.08);
  }
}

@keyframes lockRow {
  0% {
    transform: scale(1);
  }
  45% {
    transform: scale(0.95);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 700px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  :root {
    --shell-padding: 0.75rem;
    --panel-gap: 0.8rem;
    --tile-size: 3.7rem;
    --topbar-padding: 1rem;
    --board-padding: 0.9rem;
    --keyboard-padding: 0.85rem;
  }
}

@media (max-width: 480px) {
  .control-panel {
    padding: 0.75rem 0.85rem;
  }

  .chip {
    padding: 0.75rem 0.85rem;
  }

  :root {
    --panel-radius: 1.25rem;
    --topbar-padding: 0.85rem;
    --board-padding: 0.8rem;
    --keyboard-padding: 0.75rem;
    --keyboard-row-gap: 0.35rem;
    --keyboard-key-gap: 0.3rem;
    --tile-size: 3.3rem;
    --tile-gap: min(1.4vw, 0.45rem);
  }
}

@media (max-width: 860px) {
  .control-panel {
    align-items: flex-start;
  }

  .control-actions {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .control-panel {
    flex-direction: column;
    align-items: stretch;
  }

  .mode-chip {
    min-width: auto;
    width: 100%;
  }

  .control-actions {
    width: 100%;
  }

  .control-actions .ghost-button {
    flex: 1 1 0;
  }

  .modal {
    padding: 0.65rem;
  }

  .modal-card {
    padding: 1rem;
    border-radius: 1.1rem;
  }
}

@media (max-height: 820px) {
  :root {
    --shell-padding: 0.6rem;
    --panel-gap: 0.65rem;
    --topbar-padding: 0.85rem;
    --board-padding: 0.8rem;
    --keyboard-padding: 0.7rem;
    --tile-size: min(11vw, 3.6rem, 8.2dvh);
    --tile-gap: min(1vw, 0.4rem);
  }

  .topbar {
    gap: 0.7rem;
  }

  .brand-block h1 {
    font-size: clamp(1.6rem, 4.6vw, 2.6rem);
  }

  .subtitle {
    margin-top: 0.25rem;
    font-size: 0.92rem;
  }

  .chip {
    padding: 0.65rem 0.8rem;
  }

  .chip strong {
    font-size: 1rem;
  }

  .status-row {
    margin-bottom: 0.45rem;
  }

  .legend {
    font-size: 0.82rem;
    gap: 0.75rem;
  }

  .control-panel {
    padding: 0.72rem 0.85rem;
  }
}

@media (max-height: 980px) {
  :root {
    --shell-padding: 0.7rem;
    --panel-gap: 0.65rem;
    --topbar-padding: 0.95rem;
    --board-padding: 0.9rem;
    --keyboard-padding: 0.8rem;
    --tile-size: min(10.6vw, 3.45rem, 8.4dvh);
  }

  .topbar {
    gap: 0.75rem;
  }

  .brand-block h1 {
    font-size: clamp(1.8rem, 4.4vw, 2.75rem);
  }

  .subtitle {
    margin-top: 0.3rem;
    font-size: 0.95rem;
  }

  .stats {
    gap: 0.6rem;
  }

  .chip {
    padding: 0.72rem 0.85rem;
  }

  .chip strong {
    font-size: 1rem;
  }

  .legend {
    font-size: 0.84rem;
  }
}

@media (max-height: 720px) {
  :root {
    --shell-padding: 0.4rem;
    --panel-gap: 0.45rem;
    --topbar-padding: 0.7rem;
    --board-padding: 0.65rem;
    --keyboard-padding: 0.55rem;
    --tile-size: 3rem;
  }

  .eyebrow,
  .subtitle {
    display: none;
  }

  .topbar {
    gap: 0.55rem;
  }

  .control-panel {
    padding: 0.62rem 0.75rem;
  }

  .stats {
    gap: 0.45rem;
  }

  .chip {
    padding: 0.55rem 0.7rem;
  }

  .chip-label {
    font-size: 0.72rem;
  }

  .chip strong {
    font-size: 0.95rem;
  }

  .status-row {
    gap: 0.55rem;
  }

  .message {
    min-height: 1.2rem;
    font-size: 0.9rem;
  }

  .ghost-button {
    padding: 0.62rem 0.9rem;
  }

}

@media (max-height: 640px) {
  :root {
    --tile-size: 2.8rem;
  }

  .brand-block h1 {
    font-size: clamp(1.35rem, 4.2vw, 2rem);
  }

  .key {
    font-size: 0.75rem;
  }

  .key.large {
    min-width: calc(var(--keyboard-key) * var(--key-wide-multiplier));
    width: calc(var(--keyboard-key) * var(--key-wide-multiplier));
    font-size: 0.72rem;
  }
}

@media (max-width: 480px) {
  .background-glow {
    width: 14rem;
    height: 14rem;
    filter: blur(55px);
  }

  .background-glow-left {
    left: -4rem;
    top: -1rem;
  }

  .background-glow-right {
    right: -4rem;
    bottom: 12%;
  }
}

@media (orientation: portrait) and (max-width: 540px) {
  :root {
    --shell-padding: 0.55rem;
    --panel-gap: 0.55rem;
    --topbar-padding: 0.8rem;
    --board-padding: 0.75rem;
    --keyboard-padding: 0.7rem;
    --tile-size: 3.2rem;
  }

  .topbar {
    gap: 0.7rem;
  }

  .brand-block h1 {
    font-size: clamp(1.55rem, 7vw, 2.2rem);
  }

  .subtitle {
    font-size: 0.88rem;
  }

  .stats {
    gap: 0.5rem;
  }

  .chip {
    padding: 0.65rem 0.78rem;
  }

  .chip-label {
    font-size: 0.74rem;
  }

  .chip strong {
    font-size: 1rem;
  }

  .control-panel {
    padding: 0.68rem 0.78rem;
  }

  .status-row {
    margin-bottom: 0.5rem;
  }

  .message {
    min-height: 1.2rem;
    font-size: 0.9rem;
  }

  .legend {
    font-size: 0.8rem;
    gap: 0.7rem;
  }

}

@media (orientation: portrait) and (max-width: 430px) {
  :root {
    --tile-size: 3rem;
    --key-wide-multiplier: 1.18;
  }

  .keyboard-panel {
    padding-left: 0.35rem;
    padding-right: 0.35rem;
  }

  .status-row {
    margin-bottom: 0.3rem;
  }

  .message {
    font-size: 0.85rem;
  }
}