:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  height: 100%;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  overflow-x: hidden;
  overscroll-behavior: none;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #1e293b, #020617 70%);
  padding: clamp(12px, 2vw, 24px);
  touch-action: manipulation;
}

.app {
  width: min(92vw, 560px);
  max-width: 100%;
  max-height: calc(100vh - clamp(24px, 4vw, 48px));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.94);
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 20px 60px rgba(2, 6, 23, 0.45);
}

@media (max-width: 720px) {
  body {
    padding: 12px;
  }

  .app {
    padding: 18px;
    max-height: calc(100vh - 24px);
  }

  .track {
    min-height: 220px;
    height: clamp(220px, 30vh, 360px);
  }

  h1 {
    font-size: 1.6rem;
  }
}

h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.subtitle {
  margin: 0 0 20px;
  color: #94a3b8;
}

.hud {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hud-card {
  flex: 1;
  min-width: 120px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(30, 41, 59, 0.9);
  font-weight: 600;
}

.track {
  position: relative;
  flex: 1 1 auto;
  min-height: 360px;
  height: clamp(360px, 52vh, 640px);
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: linear-gradient(180deg, #111827, #0f172a);
}

.zone {
  position: absolute;
  left: 0;
  right: 0;
  top: 40%;
  height: 20%;
  background: linear-gradient(180deg, rgba(34, 197, 94, 0.18), rgba(22, 163, 74, 0.42));
  border-top: 2px solid #22c55e;
  border-bottom: 2px solid #22c55e;
  pointer-events: none;
}

.fall-line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent, #f43f5e, transparent);
  box-shadow: 0 0 12px rgba(244, 63, 94, 0.7);
}

.falling-word {
  position: absolute;
  left: 50%;
  top: -60px;
  transform: translateX(-50%);
  padding: 12px 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, #8b5cf6, #ec4899);
  color: white;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  box-shadow: 0 10px 24px rgba(236, 72, 153, 0.3);
  user-select: none;
}

.letter-correct {
  color: #4ade80;
  font-weight: 900;
}

.life-notice {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(248, 113, 113, 0.95);
  color: white;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 5;
}

.life-notice.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.difficulty-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(76px, 1fr)) minmax(112px, auto);
  gap: 6px;
}

.difficulty-btn {
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 999px;
  min-height: 34px;
  padding: 6px 9px;
  background: rgba(30, 41, 59, 0.9);
  color: #e2e8f0;
  cursor: pointer;
}

.difficulty-btn.active {
  background: #22c55e;
  color: #052e16;
  font-weight: 700;
}

#restartBtn {
  width: 100%;
  border: 0;
  border-radius: 999px;
  padding: 6px 10px;
  background: #22c55e;
  color: #052e16;
  font-weight: 700;
  font-size: 0.78rem;
  white-space: nowrap;
  cursor: pointer;
}

.start-screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(6px);
  z-index: 20;
}

.start-screen.hidden {
  display: none;
}

.hidden {
  display: none !important;
}

.start-card {
  width: min(90vw, 420px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px 24px;
  border-radius: 24px;
  background: rgba(15, 23, 42, 0.96);
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 20px 60px rgba(2, 6, 23, 0.5);
}

.start-card h2 {
  margin: 0;
  text-align: center;
  font-size: 1.8rem;
}

.start-label {
  color: #cbd5e1;
  font-size: 0.95rem;
}

#startPlayerName {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.96);
  color: #e2e8f0;
  font-size: 1rem;
  outline: none;
}

#startPlayerName:focus {
  border-color: #4ade80;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.14);
}

.start-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

#startGameBtn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
}

#startGameBtn {
  background: linear-gradient(135deg, #22c55e, #4ade80);
  color: #052e16;
}

.secondary-btn {
  background: rgba(59, 130, 246, 0.15);
  color: #dbeafe;
}

.message {
  margin: 0;
  color: #cbd5e1;
  min-height: 1.4rem;
}

.leaderboard {
  margin-top: 18px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.22);
}

.start-error {
  min-height: 1.25rem;
  margin: -4px 0 0;
  color: #fca5a5;
  font-size: 0.9rem;
}

.leaderboard-page {
  overflow-y: auto;
}

.leaderboard-page-nav {
  margin-bottom: 16px;
}

.leaderboard-page .leaderboard {
  margin-top: 0;
}

.leaderboard-page .leaderboard-header h1 {
  margin: 0;
  font-size: 1.8rem;
}

.leaderboard-btn:disabled {
  cursor: wait;
  opacity: 0.55;
}

.leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.leaderboard-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.leaderboard-btn {
  border: 0;
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(59, 130, 246, 0.15);
  color: #dbeafe;
  cursor: pointer;
}

.leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(30, 41, 59, 0.8);
}

.leaderboard-rank {
  color: #a5b4fc;
  font-weight: 700;
}

.leaderboard-name {
  color: #e2e8f0;
  font-weight: 600;
}

.leaderboard-score {
  color: #4ade80;
  font-weight: 800;
}

.leaderboard-empty {
  list-style: none;
  color: #94a3b8;
  padding: 10px 0;
}

.leaderboard-status {
  margin: 10px 0 0;
  color: #cbd5e1;
  font-size: 0.88rem;
}

.input-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-label {
  color: #cbd5e1;
  font-size: 0.95rem;
}

#playerName,
#textInput {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.96);
  color: #e2e8f0;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#textInput:focus {
  border-color: #4ade80;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.14);
}

#textInput::placeholder {
  color: #64748b;
}

@media (max-width: 720px) {
  .app {
    padding: 18px;
  }

  .track {
    min-height: 330px;
    height: clamp(330px, 45vh, 480px);
  }

  .difficulty-row {
    gap: 6px;
  }

  .difficulty-btn,
  #restartBtn {
    flex: 1;
    min-width: 0;
  }
}

@media (max-width: 480px) {
  .app {
    padding: 14px;
  }

  .hud {
    gap: 8px;
  }

  .track {
    min-height: 330px;
    height: 42vh;
  }

  .difficulty-row {
    flex-direction: column;
  }

  .difficulty-btn,
  #restartBtn {
    width: 100%;
  }

  #textInput {
    min-height: 44px;
    font-size: 0.95rem;
  }
}

/* Hacker terminal theme */
:root {
  color-scheme: dark;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  background: #020403;
  color: #d8ffe5;
}

body {
  position: relative;
  background:
    linear-gradient(rgba(0, 255, 102, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 102, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 50% -20%, #12331c 0, #07100a 46%, #020403 100%);
  background-size: 32px 32px, 32px 32px, auto;
}

body::after {
  content: "";
  position: fixed;
  z-index: 100;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(0, 0, 0, 0.55) 4px);
}

.app {
  border: 1px solid #00ff66;
  border-radius: 3px;
  background: rgba(3, 10, 6, 0.96);
  box-shadow: 12px 12px 0 rgba(0, 255, 102, 0.12), 0 0 50px rgba(0, 255, 102, 0.1);
}

.app::before {
  content: "root@klavishi:~/training $ ./start";
  display: block;
  margin: -8px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(0, 255, 102, 0.35);
  color: #00ff66;
  font-size: 0.72rem;
}

h1,
.start-card h2,
.leaderboard-header h1,
.leaderboard-header h2 {
  color: #effff3;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  text-transform: uppercase;
  text-shadow: 2px 0 rgba(255, 59, 129, 0.38), -2px 0 rgba(0, 225, 255, 0.28);
}

h1::before,
.start-card h2::before {
  content: "> ";
  color: #00ff66;
  text-shadow: 0 0 12px rgba(0, 255, 102, 0.7);
}

.subtitle,
.message,
.input-label,
.start-label,
.leaderboard-status {
  color: #8dab96;
}

.hud-card {
  border: 1px solid #246c3a;
  border-radius: 2px;
  background: #06100a;
  color: #d8ffe5;
  box-shadow: inset 0 0 18px rgba(0, 255, 102, 0.035);
}

.hud-card span {
  color: #00ff66;
  text-shadow: 0 0 10px rgba(0, 255, 102, 0.65);
}

.track {
  border: 1px solid #00b849;
  border-radius: 2px;
  background:
    linear-gradient(rgba(0, 255, 102, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 102, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, #06110a, #020604);
  background-size: 24px 24px, 24px 24px, auto;
  box-shadow: inset 0 0 45px rgba(0, 0, 0, 0.75), 0 0 24px rgba(0, 255, 102, 0.08);
}

.track::before {
  content: "LIVE_FEED // INPUT DETECTED";
  position: absolute;
  z-index: 2;
  top: 10px;
  left: 12px;
  color: rgba(0, 255, 102, 0.6);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.fall-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, #ff3b81, transparent);
  box-shadow: 0 0 14px #ff3b81;
}

.falling-word {
  border: 1px solid #00ff66;
  border-radius: 2px;
  background: #07160c;
  color: #d8ffe5;
  box-shadow: 0 0 20px rgba(0, 255, 102, 0.25), 4px 4px 0 rgba(0, 255, 102, 0.12);
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  text-shadow: 0 0 8px rgba(0, 255, 102, 0.4);
}

.letter-correct {
  color: #00ff66;
  text-shadow: 0 0 10px #00ff66;
}

.life-notice {
  border: 1px solid #ff3b81;
  border-radius: 2px;
  background: #220713;
  color: #ff8eb6;
  box-shadow: 0 0 20px rgba(255, 59, 129, 0.25);
}

.difficulty-btn,
#restartBtn,
#startGameBtn,
.secondary-btn,
.leaderboard-btn {
  border: 1px solid #246c3a;
  border-radius: 2px;
  background: #06100a;
  color: #9ec8a9;
  font-family: inherit;
  text-transform: uppercase;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.difficulty-btn:hover,
.secondary-btn:hover,
.leaderboard-btn:hover {
  border-color: #00ff66;
  color: #00ff66;
  box-shadow: 0 0 14px rgba(0, 255, 102, 0.12);
}

.difficulty-btn.active,
#restartBtn,
#startGameBtn {
  border-color: #00ff66;
  background: #00ff66;
  color: #021006;
  box-shadow: 4px 4px 0 rgba(0, 255, 102, 0.18), 0 0 18px rgba(0, 255, 102, 0.12);
}

#restartBtn::before,
#startGameBtn::before {
  content: "./";
}

.start-screen {
  background:
    linear-gradient(rgba(0, 255, 102, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 102, 0.04) 1px, transparent 1px),
    rgba(1, 5, 3, 0.92);
  background-size: 28px 28px;
  backdrop-filter: blur(8px);
}

.start-card {
  border: 1px solid #00ff66;
  border-radius: 3px;
  background: rgba(3, 10, 6, 0.98);
  box-shadow: 10px 10px 0 rgba(0, 255, 102, 0.12), 0 0 55px rgba(0, 255, 102, 0.12);
}

.start-card::before {
  content: "AUTHORIZATION_REQUIRED";
  color: #00ff66;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

#startPlayerName,
#playerName,
#textInput {
  border: 1px solid #246c3a;
  border-radius: 2px;
  background: #020604;
  color: #d8ffe5;
  font-family: inherit;
  caret-color: #00ff66;
}

#startPlayerName:focus,
#playerName:focus,
#textInput:focus {
  border-color: #00ff66;
  box-shadow: 0 0 0 2px rgba(0, 255, 102, 0.12), 0 0 20px rgba(0, 255, 102, 0.09);
}

#startPlayerName::placeholder,
#playerName::placeholder,
#textInput::placeholder {
  color: #3f6f4b;
}

.start-error { color: #ff719f; }
.leaderboard { border: 1px solid #246c3a; border-radius: 2px; background: #041008; }
.leaderboard-item { border: 1px solid rgba(0, 255, 102, 0.16); border-radius: 2px; background: #06100a; }
.leaderboard-rank,
.leaderboard-score { color: #00ff66; }
.leaderboard-name { color: #d8ffe5; }

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid #d9ff3f;
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

/* Fluid height based on the visible viewport */
html,
body {
  height: 100%;
  min-height: 100%;
  overflow: hidden;
}

.app {
  height: calc(100dvh - clamp(24px, 4vw, 48px));
  max-height: calc(100dvh - clamp(24px, 4vw, 48px));
}

.track {
  flex: 1 1 0;
  min-height: 180px;
  height: auto;
}

/* Fit the whole game into small viewports without page scrolling */
@media (max-width: 720px) {
  html,
  body {
    height: 100%;
    min-height: 100%;
    overflow: hidden;
  }

  body {
    padding: 8px;
  }

  .app {
    width: min(100%, 560px);
    height: calc(100dvh - 16px);
    max-height: calc(100dvh - 16px);
    padding: 14px;
  }

  .app::before {
    margin-bottom: 10px;
    padding-bottom: 8px;
  }

  h1 {
    margin-bottom: 3px;
    font-size: clamp(1.2rem, 5vw, 1.5rem);
  }

  .subtitle {
    margin-bottom: 10px;
    font-size: 0.78rem;
  }

  .hud {
    gap: 7px;
    margin-bottom: 9px;
  }

  .hud-card {
    min-width: 0;
    padding: 8px 10px;
    font-size: 0.82rem;
  }

  .track {
    flex: 1 1 0;
    min-height: 180px;
    height: auto;
  }

  .controls {
    flex: 0 0 auto;
    gap: 6px;
    margin-top: 9px;
  }

  .difficulty-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(94px, 1.25fr);
    gap: 5px;
  }

  .difficulty-btn,
  #restartBtn {
    width: auto;
    min-height: 34px;
    padding: 6px 8px;
    font-size: clamp(0.56rem, 2.1vw, 0.72rem);
    white-space: nowrap;
  }

  .input-row {
    gap: 3px;
  }

  .input-label {
    font-size: 0.7rem;
  }

  #playerName,
  #textInput {
    min-height: 38px;
    padding: 7px 10px;
    font-size: 0.82rem;
  }

  .message {
    min-height: 1rem;
    font-size: 0.7rem;
    line-height: 1.25;
  }
}

@media (max-width: 480px) {
  .app {
    padding: 11px;
  }

  .difficulty-row {
    flex-direction: initial;
  }
}

@media (max-height: 680px) and (max-width: 720px) {
  .subtitle,
  .input-label,
  .message {
    display: none;
  }

  .app::before {
    margin-bottom: 6px;
    padding-bottom: 5px;
    font-size: 0.58rem;
  }

  .hud {
    margin-bottom: 6px;
  }

  .controls {
    margin-top: 6px;
  }

  .track {
    min-height: 150px;
  }
}

/* Immersive full-screen game layout */
body {
  display: block;
  padding: 0;
  background-color: #020403;
}

.app {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100dvh;
  max-width: none;
  max-height: none;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: rgba(2, 6, 4, 0.82);
  box-shadow: none;
}

.app::before,
.app > h1,
.app > .subtitle {
  display: none;
}

.hud {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  height: 46px;
  margin: 0;
  padding: 7px 16px;
  border-bottom: 1px solid rgba(0, 255, 102, 0.16);
  background: rgba(1, 5, 3, 0.9);
}

.hud-card {
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  color: #55715e;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hud-card:last-child { text-align: right; }
.hud-card span {
  display: block;
  margin-top: 1px;
  color: #d8ffe5;
  font-size: 0.94rem;
  letter-spacing: 0.04em;
}

.hud-card:last-child span { color: #ff3b65; }

.track {
  position: absolute;
  inset: 46px 0 48px;
  width: auto;
  height: auto;
  min-height: 0;
  border: 0;
  border-radius: 0;
  box-shadow: inset 0 -80px 80px rgba(104, 160, 26, 0.08);
}

.track::before {
  top: 9px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.52rem;
  opacity: 0.45;
}

.fall-line {
  bottom: 28px;
  opacity: 0.5;
}

.falling-word {
  padding: 8px 12px;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
}

.controls {
  position: absolute;
  z-index: 12;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: 1fr minmax(180px, 280px) 1fr;
  align-items: center;
  gap: 12px;
  height: 48px;
  margin: 0;
  padding: 5px 12px;
  border-top: 1px solid rgba(0, 255, 102, 0.16);
  background: rgba(1, 5, 3, 0.94);
}

.controls .input-row:first-of-type,
.controls .input-label,
.controls .message {
  display: none;
}

.difficulty-row {
  grid-column: 1;
  grid-row: 1;
  grid-template-columns: repeat(3, minmax(54px, 72px)) minmax(92px, 112px);
  justify-content: start;
  gap: 4px;
}

.difficulty-btn,
#restartBtn {
  min-height: 28px;
  padding: 4px 6px;
  font-size: 0.58rem;
}

.controls .input-row:has(#textInput) {
  grid-column: 2;
  grid-row: 1;
}

#textInput {
  width: 100%;
  min-height: 30px;
  padding: 4px 10px;
  border-color: rgba(0, 255, 102, 0.28);
  font-size: 0.72rem;
  text-align: center;
}

@media (max-width: 720px) {
  .app {
    width: 100%;
    height: 100dvh;
    max-height: none;
    padding: 0;
  }

  .track {
    inset: 42px 0 84px;
    min-height: 0;
  }

  .hud {
    height: 42px;
    padding: 5px 9px;
  }

  .controls {
    grid-template-columns: 1fr;
    grid-template-rows: 34px 34px;
    gap: 3px;
    height: 84px;
    padding: 5px 8px;
  }

  .difficulty-row {
    grid-column: 1;
    grid-row: 1;
    grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(90px, 1.3fr);
    width: 100%;
  }

  .controls .input-row:has(#textInput) {
    grid-column: 1;
    grid-row: 2;
    width: min(100%, 360px);
    justify-self: center;
  }
}

@media (max-width: 390px) {
  .difficulty-btn,
  #restartBtn {
    padding-inline: 3px;
    font-size: 0.5rem;
  }
}