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

:root {
  --bg: #0a0a1a;
  --panel-bg: #12122a;
  --border: #2a2a5a;
  --text: #e0e0ff;
  --text-dim: #8888bb;
  --neon-green: #39ff14;
  --neon-pink: #ff2d95;
  --neon-cyan: #00f0ff;
  --neon-yellow: #ffe600;
  --correct: #2ecc40;
  --present: #f1c40f;
  --absent: #3a3a5c;
  --key-bg: #22224a;
  --key-text: #d0d0ff;
  --btn-primary: #6c2bd9;
  --btn-primary-hover: #8b4fe8;
  --btn-secondary: #1a73e8;
  --btn-accent: #ff2d95;
  --tile-border: #3a3a6a;
  --tile-empty: #1a1a35;
}

html, body {
  height: 100%;
  overflow: hidden;
  touch-action: manipulation;
}

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: center;
}

.screen {
  display: none;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: absolute;
  top: 0;
  left: 0;
}

.screen.active {
  display: flex;
}

/* --- Title --- */

.title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.title-small {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(0.7rem, 2.5vw, 1rem);
  letter-spacing: 0.08em;
}

.glow {
  color: #b0e8ff;
  text-shadow:
    0 0 6px rgba(0, 240, 255, 0.25),
    0 0 15px rgba(0, 240, 255, 0.1);
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.welcome {
  color: var(--neon-green);
  font-size: 1rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* --- Panel --- */

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  width: min(92vw, 400px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.05);
}

.panel-wide {
  width: min(95vw, 600px);
  max-height: 85vh;
  overflow-y: auto;
}

/* --- Form --- */

.form-group {
  width: 100%;
}

input[type="text"],
input[type="password"],
input[type="number"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

input:focus {
  border-color: var(--neon-cyan);
}

.number-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
}

.number-group input {
  width: 100%;
  color: #fff;
}

.error {
  color: var(--neon-pink);
  font-size: 0.85rem;
  min-height: 1.2em;
  text-align: center;
}

/* --- Buttons --- */

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: all 0.15s;
  letter-spacing: 0.05em;
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(0.55rem, 1.8vw, 0.75rem);
}

.btn-primary {
  background: var(--btn-primary);
  color: #fff;
}
.btn-primary:hover, .btn-primary:active {
  background: var(--btn-primary-hover);
  box-shadow: 0 0 15px rgba(108, 43, 217, 0.5);
}

.btn-secondary {
  background: var(--btn-secondary);
  color: #fff;
}
.btn-secondary:hover, .btn-secondary:active {
  box-shadow: 0 0 15px rgba(26, 115, 232, 0.5);
}

.btn-accent {
  background: var(--btn-accent);
  color: #fff;
}
.btn-accent:hover, .btn-accent:active {
  box-shadow: 0 0 15px rgba(255, 45, 149, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover, .btn-ghost:active {
  color: var(--text);
  border-color: var(--text-dim);
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Game Header --- */

.game-header {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  gap: 0.3rem;
}

.game-info {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  font-size: clamp(0.8rem, 2.8vw, 0.95rem);
  color: var(--text-dim);
  width: 100%;
  justify-content: center;
  letter-spacing: 0.03em;
  padding: 0.2rem 0;
}

.game-actions {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  display: flex;
  gap: 0.4rem;
}

/* --- Board --- */

.board {
  display: flex;
  flex-direction: column;
  gap: clamp(5px, 1vw, 7px);
  align-items: center;
  padding: 0.4rem 0;
}

.row {
  display: flex;
  gap: clamp(5px, 1vw, 7px);
}

.tile {
  width: clamp(46px, 13vw, 62px);
  height: clamp(46px, 13vw, 62px);
  border: 2px solid var(--tile-border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 800;
  background: var(--tile-empty);
  color: var(--text);
  transition: transform 0.1s;
  text-transform: uppercase;
}

.tile.filled {
  border-color: var(--text-dim);
  animation: pop 0.1s ease;
}

.tile.correct {
  background: var(--correct);
  border-color: var(--correct);
  color: #fff;
}

.tile.present {
  background: var(--present);
  border-color: var(--present);
  color: #1a1a1a;
}

.tile.absent {
  background: var(--absent);
  border-color: var(--absent);
  color: #aaa;
}

.tile.reveal {
  animation: flip 0.4s ease forwards;
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

@keyframes flip {
  0% { transform: rotateX(0); }
  50% { transform: rotateX(90deg); }
  100% { transform: rotateX(0); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-5px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

.row.shake {
  animation: shake 0.35s ease;
}

/* --- Message --- */

.message {
  min-height: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.8rem, 2.5vw, 1.1rem);
  font-weight: 700;
  text-align: center;
  padding: 0.25rem 0.5rem;
}

.message.win {
  color: var(--neon-green);
  text-shadow: 0 0 10px var(--neon-green);
}

.message.lose {
  color: var(--neon-pink);
  text-shadow: 0 0 10px var(--neon-pink);
}

/* --- Game Over Actions --- */

.game-over-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  padding: 0 1rem;
  max-width: 500px;
}

.game-over-actions .btn {
  width: auto;
  min-width: 120px;
  padding: 0.5rem 1rem;
}

.hidden {
  display: none !important;
}

/* --- Keyboard --- */

.keyboard {
  display: flex;
  flex-direction: column;
  gap: clamp(4px, 0.8vw, 6px);
  align-items: center;
  padding: 0.3rem 0.25rem;
  width: 100%;
  max-width: 540px;
}

.kb-row {
  display: flex;
  gap: clamp(3px, 0.6vw, 5px);
  justify-content: center;
  width: 100%;
}

.key {
  flex: 1;
  max-width: clamp(28px, 8vw, 44px);
  height: clamp(40px, 10vw, 54px);
  border: none;
  border-radius: 6px;
  background: var(--key-bg);
  color: var(--key-text);
  font-size: clamp(0.75rem, 2.5vw, 1rem);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.key:active {
  transform: scale(0.95);
}

.key.wide {
  max-width: clamp(52px, 14vw, 72px);
  font-size: clamp(0.55rem, 1.8vw, 0.75rem);
  letter-spacing: 0.02em;
}

.key.correct {
  background: var(--correct);
  color: #fff;
}

.key.present {
  background: var(--present);
  color: #1a1a1a;
}

.key.absent {
  background: #1e1e30;
  color: #555;
}

/* --- Ranking Table --- */

.ranking-table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(0.6rem, 1.8vw, 0.85rem);
}

.ranking-table th {
  color: var(--neon-cyan);
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.3rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.ranking-table td {
  padding: 0.5rem 0.3rem;
  border-bottom: 1px solid rgba(42, 42, 90, 0.4);
}

.ranking-table tr:first-child td {
  color: var(--neon-yellow);
  font-weight: 700;
}

/* --- Toast --- */

.toast {
  position: fixed;
  top: 4rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-bg);
  border: 1px solid var(--neon-cyan);
  color: var(--text);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 1000;
  text-align: center;
}

.toast.show {
  opacity: 1;
}

/* --- Responsive --- */

#screen-game {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  gap: 0;
  justify-content: space-between;
}

@media (max-height: 700px) {
  .tile {
    width: clamp(38px, 11vw, 54px);
    height: clamp(38px, 11vw, 54px);
    font-size: clamp(1.1rem, 4vw, 1.6rem);
  }
  .key {
    height: clamp(38px, 9vw, 48px);
  }
}

@media (max-width: 360px) {
  .tile {
    width: 40px;
    height: 40px;
    font-size: 1.15rem;
  }
  .key {
    height: 40px;
    font-size: 0.75rem;
  }
}