:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface2: #242424;
  --border: #2e2e2e;
  --text: #f0ede8;
  --muted: #7a776f;
  --accent: #d4f040;
  --correct: #4ade80;
  --wrong: #f87171;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "Space Mono", "Courier New", monospace;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.text-accent {
  color: var(--accent) !important;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
header {
  width: 100%;
  max-width: 680px;
  padding: 1.5rem 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  position: relative;
}
.subtitle {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--muted);
}
.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.streak {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.streak strong {
  color: var(--accent);
  font-size: 0.95rem;
}
.btn-how {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  margin-top: 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition:
    border-color 0.15s,
    color 0.15s;
}
.btn-how:hover {
  border-color: var(--muted);
  color: var(--text);
}
main {
  width: 100%;
  max-width: 680px;
  padding: 0 1.5rem 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
}
.meta-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.puzzle-number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.difficulty-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  border: 1px solid;
}
.diff-easy {
  color: #4ade80;
  border-color: rgba(74, 222, 128, 0.3);
  background: rgba(74, 222, 128, 0.07);
}
.diff-medium {
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.3);
  background: rgba(251, 191, 36, 0.07);
}
.diff-hard {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.3);
  background: rgba(248, 113, 113, 0.07);
}

.acronym-section {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem 2rem 1.75rem;
  text-align: center;
}
.acronym-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}
.acronym-display {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.18em;
  line-height: 1.1;
  word-break: break-all;
}
.word-count-hint {
  margin-top: 0.85rem;
  font-size: 0.72rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.inputs-section {
  width: 100%;
}
.inputs-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.85rem;
  font-family: var(--font-mono);
}
.word-inputs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.word-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.word-letter-label {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  width: 22px;
  flex-shrink: 0;
  text-align: center;
}
.word-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.95rem;
  padding: 0.5rem 0.85rem;
  outline: none;
  transition: border-color 0.15s;
  min-width: 0;
}
.word-input:focus {
  border-color: var(--accent);
}
.word-input.correct {
  border-color: var(--correct);
  background: rgba(74, 222, 128, 0.06);
  color: var(--correct);
}
.word-input.close {
  border-color: var(--accent);
  background: rgba(212, 240, 64, 0.06);
  color: var(--accent);
}
.word-input.wrong {
  border-color: var(--wrong);
  background: rgba(248, 113, 113, 0.06);
}
.word-input:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}
.word-input::placeholder {
  color: var(--muted);
  font-size: 0.82rem;
}
.check-icon {
  width: 22px;
  flex-shrink: 0;
  font-size: 0.9rem;
  text-align: center;
  color: var(--correct);
}

.controls {
  width: 100%;
  display: flex;
  gap: 10px;
}
.btn-submit {
  flex: 1;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #0f0f0f;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  cursor: pointer;
  transition:
    background 0.15s,
    transform 0.1s;
}
.btn-submit:hover {
  background: #c4e030;
}
.btn-submit:active {
  transform: scale(0.98);
}
.btn-submit:disabled {
  background: var(--surface2);
  color: var(--muted);
  cursor: not-allowed;
}
.btn-hint {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.85rem;
  padding: 0.65rem 1rem;
  cursor: pointer;
  transition:
    border-color 0.15s,
    color 0.15s;
  white-space: nowrap;
}
.btn-hint:hover:not(:disabled) {
  border-color: var(--muted);
  color: var(--text);
}
.btn-hint:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.attempts-section {
  width: 100%;
}
.attempts-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}
.attempts-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-family: var(--font-mono);
}
.attempt-dots {
  display: flex;
  gap: 6px;
}
.attempt-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  transition:
    background 0.2s,
    border-color 0.2s;
}
.attempt-dot.used {
  background: var(--wrong);
  border-color: var(--wrong);
}
.attempt-dot.won {
  background: var(--correct);
  border-color: var(--correct);
}

.attempt-history {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 0.4rem;
}
.attempt-row {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.attempt-row .score {
  color: var(--text);
  flex-shrink: 0;
}
.attempt-row .words-tried {
  color: var(--muted);
  word-break: break-word;
}

.message {
  min-height: 1.3rem;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
  font-family: var(--font-mono);
  transition: color 0.2s;
}
.message.error {
  color: var(--wrong);
}
.message.success {
  color: var(--correct);
}
.message.info {
  color: var(--accent);
}

.result-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
}
.result-card.visible {
  display: flex;
}
.result-icon {
  font-size: 2.2rem;
  line-height: 1;
}
.result-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}
.result-phrase {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.7;
}
.result-phrase strong {
  color: var(--correct);
  font-size: 1rem;
  display: block;
  margin-bottom: 0.25rem;
  letter-spacing: 0.08em;
}
.result-stats {
  display: flex;
  gap: 2rem;
}
.result-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}
.result-stat .num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}
.result-stat .lbl {
  font-size: 0.68rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.btn-share {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #0f0f0f;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-share:hover {
  background: #c4e030;
}
.next-puzzle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1.5rem;
}
.modal-overlay.open {
  display: flex;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
  max-width: 430px;
  width: 100%;
  position: relative;
}
.modal h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.1rem;
  color: var(--accent);
  font-family: var(--font-mono);
}
.modal p {
  font-size: 0.85rem;
  line-height: 1.65;
  color: #c8c5c0;
  margin-bottom: 0.75rem;
}
.modal .example {
  background: var(--surface2);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  margin: 0.9rem 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.modal .example .ex-label {
  color: var(--muted);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}
.modal .example .ex-acr {
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}
.modal .example .ex-phrase {
  color: var(--text);
  margin-top: 0.4rem;
  line-height: 1.6;
}
.modal .example .ex-phrase em {
  color: var(--accent);
  font-style: normal;
  font-weight: 700;
}
.diff-sched {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0.75rem 0;
}
.diff-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: #c8c5c0;
}
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.2rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.15s;
}
.modal-close:hover {
  color: var(--text);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}
.shake {
  animation: shake 0.3s ease;
}

@media (max-width: 480px) {
  .acronym-display {
    font-size: 1.8rem;
  }
  .logo {
    font-size: 1.5rem;
  }
  main {
    padding: 0 1rem 2rem;
  }
}