:root {
  --bg: #0a0c10;
  --panel: #111520;
  --border: #1e2535;
  --accent: #e8c547;
  --accent2: #5be0c8;
  --danger: #e05b5b;
  --text: #d4dae8;
  --muted: #5a6278;
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%, rgba(232,197,71,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(91,224,200,0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* TOP BAR */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 6px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.app-title {
  font-family: 'Crimson Pro', serif;
  font-weight: 300;
  font-size: 1.4rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
}

.stats {
  display: flex;
  gap: 14px;
  align-items: center;
}

.stat { text-align: center; }

.stat-val {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.5rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 1px;
}

.stat-divider {
  width: 1px;
  height: 24px;
  background: var(--border);
}

/* PROGRESS */
.progress-bar {
  height: 2px;
  background: var(--border);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width 0.4s ease;
}

/* MODE TABS */
.mode-select {
  display: flex;
  gap: 6px;
  padding: 8px 16px;
  flex-shrink: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  position: relative;
  z-index: 1;
}

.mode-select::-webkit-scrollbar { display: none; }

.mode-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
}

.mode-btn:hover, .mode-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(232,197,71,0.06);
}

/* GAME AREA */
.game-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 8px 16px 12px;
  min-height: 0;
  position: relative;
  z-index: 1;
}

.game-card {
  background: var(--panel);
  border: 1px solid var(--border);
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 14px 16px 12px;
  position: relative;
  min-height: 0;
  overflow: hidden;
}

.game-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.question-meta {
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 8px;
  flex-shrink: 0;
}

/* Question row: element box + question text side by side */
.question-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
  flex-shrink: 0;
}

.element-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid var(--accent);
  padding: 6px 12px;
  background: rgba(232,197,71,0.05);
  min-width: 64px;
  flex-shrink: 0;
}

.element-number { font-size: 0.55rem; color: var(--muted); }

.element-symbol {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}

.element-name-disp {
  font-size: 0.55rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.question-text {
  font-family: 'Crimson Pro', serif;
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 300;
  line-height: 1.4;
  color: var(--text);
}

/* ANSWERS */
.answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  flex-shrink: 0;
}

.answer-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  padding: 10px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  line-height: 1.3;
}

.answer-btn:hover:not(:disabled) {
  border-color: var(--accent2);
  color: var(--accent2);
  background: rgba(91,224,200,0.04);
}

.answer-btn.correct {
  border-color: var(--accent2);
  background: rgba(91,224,200,0.12);
  color: var(--accent2);
}

.answer-btn.wrong {
  border-color: var(--danger);
  background: rgba(224,91,91,0.1);
  color: var(--danger);
}

.answer-btn:disabled { cursor: default; }

/* TYPE IT */
.text-input-wrap {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.text-input {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 0.9rem;
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.2s;
}

.text-input:focus { border-color: var(--accent); }
.text-input.correct { border-color: var(--accent2); color: var(--accent2); }
.text-input.wrong { border-color: var(--danger); color: var(--danger); }

.submit-btn {
  background: var(--accent);
  border: none;
  color: var(--bg);
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 10px 16px;
  cursor: pointer;
  text-transform: uppercase;
}

/* FEEDBACK */
.feedback {
  margin-top: 8px;
  padding: 8px 12px;
  border-left: 3px solid var(--accent2);
  background: rgba(91,224,200,0.05);
  font-size: 0.68rem;
  line-height: 1.5;
  display: none;
  flex-shrink: 0;
}

.feedback.show { display: block; }
.feedback.wrong-fb { border-color: var(--danger); background: rgba(224,91,91,0.05); }
.feedback strong { color: var(--accent); }

.next-btn {
  margin-top: 8px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 9px 16px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.2s;
  display: none;
  flex-shrink: 0;
  width: 100%;
}

.next-btn.show { display: block; }
.next-btn:hover { background: rgba(232,197,71,0.08); }

/* RESULTS */
.results-screen {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-align: center;
  padding: 24px;
  position: relative;
  z-index: 1;
}

.results-screen.show { display: flex; }

.results-score {
  font-family: 'Crimson Pro', serif;
  font-size: clamp(4rem, 18vw, 7rem);
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}

.results-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.results-grade {
  font-family: 'Crimson Pro', serif;
  font-style: italic;
  font-size: 1.2rem;
  color: var(--accent2);
  margin-bottom: 28px;
}

.restart-btn {
  background: var(--accent);
  border: none;
  color: var(--bg);
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 14px 32px;
  cursor: pointer;
  text-transform: uppercase;
}

@media (max-width: 380px) {
  .answers { grid-template-columns: 1fr; }
  .answer-btn { padding: 8px; font-size: 0.65rem; }
}