@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Share+Tech+Mono&display=swap');

:root {
  --bg:      #0A0A1A;
  --cyan:    #00FFFF;
  --magenta: #FF00FF;
  --gold:    #FFD700;
  --red:     #FF003C;
  --green:   #00FF41;
  --dim:     #334466;
  --dimtext: #6688AA;
  --white:   #CCDDFF;
}

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

body {
  background: var(--bg);
  color: var(--white);
  font-family: 'Share Tech Mono', monospace;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  user-select: none;
}

#bg-canvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
}

/* ── HUD ─────────────────────────────────────────────── */
#hud {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 24px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.7), transparent);
  z-index: 10;
  font-family: 'Orbitron', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--dimtext);
}
#hud .hud-item span { display: block; }
#hud .hud-label { font-size: 11px; color: var(--dimtext); margin-bottom: 2px; }
#hud .hud-value { font-size: 22px; font-weight: 700; color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan); }
#hud-chain .hud-value { color: var(--gold); text-shadow: 0 0 12px var(--gold); }

/* ── Timer bar ───────────────────────────────────────── */
#timer-wrap {
  position: fixed; top: 64px; left: 0; right: 0;
  height: 4px; background: var(--dim); z-index: 10;
}
#timer-fill {
  height: 100%; width: 100%;
  background: var(--cyan);
  transition: background 0.3s;
  box-shadow: 0 0 8px currentColor;
}

/* ── Game area ───────────────────────────────────────── */
#game-area {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 5; gap: 24px;
}

/* Chain timeline */
#chain-timeline {
  display: flex; align-items: center; gap: 4px;
  max-width: 80vw; overflow-x: auto;
  padding: 8px 16px;
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--dim);
  border-radius: 4px;
  min-height: 44px;
  scrollbar-width: none;
}
#chain-timeline::-webkit-scrollbar { display: none; }

.chain-word {
  font-family: 'Orbitron', monospace;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}
.chain-latest {
  color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan);
}
.chain-link { color: #4466AA; }

/* Next letter */
#next-letter-wrap {
  text-align: center;
}
#next-letter-label {
  font-size: 14px; color: var(--white); letter-spacing: 3px; margin-bottom: 6px;
}
#next-letter {
  font-family: 'Orbitron', monospace;
  font-size: 72px; font-weight: 900;
  color: var(--magenta);
  text-shadow: 0 0 30px var(--magenta), 0 0 60px var(--magenta);
  line-height: 1;
}

/* Input area */
#input-wrap { text-align: center; position: relative; }

#input-display {
  font-family: 'Orbitron', monospace;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 6px;
  min-width: 200px;
  min-height: 48px;
  padding: 8px 16px;
  border-bottom: 2px solid var(--cyan);
  display: inline-block;
}
.req-letter {
  color: var(--magenta);
  text-shadow: 0 0 12px var(--magenta);
}
.typed-char {
  color: var(--cyan);
  text-shadow: 0 0 8px var(--cyan);
}
.cursor-blink {
  color: var(--cyan); opacity: 1;
  animation: blink 0.8s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

#input-error {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  font-size: 14px; color: var(--red);
  text-shadow: 0 0 8px var(--red);
  letter-spacing: 3px; margin-top: 8px;
  white-space: nowrap;
}
#hint-display {
  font-size: 14px; color: var(--gold);
  letter-spacing: 2px; margin-top: 8px;
}

/* Hint tip */
#hint-tip {
  font-size: 12px; color: var(--dimtext); letter-spacing: 2px; margin-top: 4px;
}

/* Combo flash */
#combo-flash {
  position: fixed; top: 30%; left: 50%; transform: translateX(-50%);
  font-family: 'Orbitron', monospace;
  font-size: 28px; font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 30px var(--gold);
  z-index: 20; pointer-events: none;
}
@keyframes comboFlash {
  0%   { opacity: 1; transform: translateX(-50%) scale(1.2); }
  60%  { opacity: 1; transform: translateX(-50%) scale(1); }
  100% { opacity: 0; transform: translateX(-50%) scale(0.8) translateY(-20px); }
}

/* Floating score */
.floating-score {
  position: fixed;
  font-family: 'Orbitron', monospace;
  font-size: 16px; font-weight: 700;
  color: var(--gold);
  text-shadow: 0 0 12px var(--gold);
  pointer-events: none; z-index: 20;
  animation: floatUp 1s forwards;
}
@keyframes floatUp {
  0%   { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-50px); }
}

/* ── Overlays ─────────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  z-index: 30; gap: 20px;
  background: rgba(10,10,26,0.85);
}
.hidden { display: none !important; }

/* Menu */
.game-title {
  font-family: 'Orbitron', monospace;
  font-weight: 900; letter-spacing: 8px;
  text-align: center;
}
.game-title .word { font-size: 52px; color: var(--white); }
.game-title .chain { font-size: 52px; color: var(--cyan);
  text-shadow: 0 0 30px var(--cyan), 0 0 60px var(--cyan); }
.tagline {
  font-size: 16px; color: var(--white); letter-spacing: 4px;
  text-align: center;
}

.btn {
  font-family: 'Orbitron', monospace;
  font-size: 14px; font-weight: 700;
  letter-spacing: 4px;
  padding: 14px 40px;
  border: 2px solid var(--cyan);
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
}
.btn:hover {
  background: var(--cyan);
  color: var(--bg);
  box-shadow: 0 0 20px var(--cyan);
}
.btn-secondary {
  border-color: var(--dim); color: var(--dimtext);
  font-size: 12px; padding: 10px 28px;
}
.btn-secondary:hover {
  background: var(--dim); color: var(--white); box-shadow: none;
}

.menu-instructions {
  max-width: 480px; text-align: center;
  font-size: 13px; color: var(--white);
  line-height: 2; letter-spacing: 2px;
  border: 1px solid var(--dim);
  padding: 16px 24px;
}
.menu-instructions span { color: var(--cyan); }

/* Game over */
.go-title {
  font-family: 'Orbitron', monospace;
  font-size: 42px; font-weight: 900;
  color: var(--red);
  text-shadow: 0 0 30px var(--red);
  letter-spacing: 6px;
}
.go-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 12px 32px; text-align: center;
}
.go-stat-label { font-size: 12px; color: var(--dimtext); letter-spacing: 3px; }
.go-stat-value { font-family: 'Orbitron', monospace; font-size: 28px;
  font-weight: 700; color: var(--cyan); }
#go-chain.go-stat-value { color: var(--gold); }

#go-new-record {
  font-family: 'Orbitron', monospace;
  font-size: 14px; color: var(--gold);
  text-shadow: 0 0 16px var(--gold);
  letter-spacing: 4px;
  animation: pulse 0.8s ease-in-out infinite alternate;
}
@keyframes pulse { from { opacity: 0.6; } to { opacity: 1; } }

#go-history {
  font-size: 14px; color: var(--dimtext);
  max-width: 500px; text-align: center;
  line-height: 1.8;
}
.go-word { color: var(--cyan); }

.go-last-label { font-size: 12px; color: var(--dimtext); letter-spacing: 2px; }
#go-last { color: var(--red); font-size: 16px; letter-spacing: 3px; }

.go-buttons { display: flex; gap: 16px; }

/* ── Urgency mode ─────────────────────────────────────── */
@keyframes urgentPulse {
  0%, 100% { box-shadow: inset 0 0 0 0 transparent; }
  50%       { box-shadow: inset 0 0 60px 20px rgba(255,0,60,0.18); }
}
body.urgent {
  animation: urgentPulse 0.6s ease-in-out infinite;
}
body.urgent #timer-fill {
  animation: urgentFlicker 0.3s step-end infinite;
}
@keyframes urgentFlicker {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

/* ── Input accept flash ───────────────────────────────── */
@keyframes inputAccept {
  0%   { border-color: var(--green); color: var(--green); text-shadow: 0 0 20px var(--green); }
  100% { border-color: var(--cyan);  color: var(--cyan);  text-shadow: none; }
}
#input-display.input-accept {
  animation: inputAccept 0.3s ease-out forwards;
}

/* ── Speed notice ─────────────────────────────────────── */
#speed-notice {
  position: fixed; top: 80px; left: 50%; transform: translateX(-50%);
  font-family: 'Orbitron', monospace;
  font-size: 14px; font-weight: 700;
  color: var(--gold);
  text-shadow: 0 0 12px var(--gold);
  letter-spacing: 3px;
  z-index: 20; pointer-events: none;
  white-space: nowrap;
}
@keyframes speedNotice {
  0%   { opacity: 0; transform: translateX(-50%) translateY(-8px); }
  15%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  70%  { opacity: 1; }
  100% { opacity: 0; transform: translateX(-50%) translateY(-8px); }
}

/* ── Power-up HUD ─────────────────────────────────────── */
#powerup-hud {
  display: flex; gap: 10px;
}
.pu-slot {
  display: flex; flex-direction: column; align-items: center;
  gap: 3px;
  padding: 6px 14px;
  border: 1px solid var(--cyan);
  background: rgba(0,255,255,0.06);
  cursor: pointer;
  transition: all 0.15s;
  min-width: 58px;
}
.pu-slot:hover { background: rgba(0,255,255,0.14); }
.pu-slot.spent {
  border-color: var(--dim);
  background: transparent;
  opacity: 0.35;
}
.pu-key {
  font-family: 'Orbitron', monospace;
  font-size: 14px; font-weight: 900;
  color: var(--cyan);
  text-shadow: 0 0 8px var(--cyan);
}
.pu-slot.spent .pu-key { color: var(--dimtext); text-shadow: none; }
.pu-label {
  font-size: 9px; letter-spacing: 1px;
  color: var(--dimtext); text-align: center;
  line-height: 1.3;
}

/* ── Selector groups (difficulty / category) ──────────── */
.selector-group { text-align: center; }
.selector-label {
  font-size: 10px; letter-spacing: 3px;
  color: var(--dimtext); margin-bottom: 6px;
}
.selector-row { display: flex; gap: 6px; justify-content: center; }

.diff-btn, .cat-btn {
  font-family: 'Orbitron', monospace;
  font-size: 10px; font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 14px;
  border: 1px solid var(--dim);
  background: transparent;
  color: var(--dimtext);
  cursor: pointer;
  transition: all 0.15s;
}
.diff-btn:hover, .cat-btn:hover {
  border-color: var(--cyan); color: var(--cyan);
}
.diff-btn.active, .cat-btn.active {
  border-color: var(--cyan);
  background: rgba(0,255,255,0.12);
  color: var(--cyan);
  text-shadow: 0 0 8px var(--cyan);
}

/* ── WOTD panel ───────────────────────────────────────── */
#wotd-panel {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 10px 24px;
  border: 1px solid var(--dim);
  background: rgba(0,0,0,0.3);
}
.wotd-label {
  font-size: 10px; letter-spacing: 3px; color: var(--dimtext);
}
#wotd-word {
  font-family: 'Orbitron', monospace;
  font-size: 22px; font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 14px var(--gold);
  letter-spacing: 6px;
}

/* ── Menu rank display ────────────────────────────────── */
#menu-rank-display {
  font-size: 11px; letter-spacing: 2px;
  color: var(--dimtext);
}
#menu-rank-label { color: var(--cyan); }

/* ── XP bar ───────────────────────────────────────────── */
#go-xp-section, #stats-xp-section {
  text-align: center; width: 320px;
}
#go-xp-gained {
  font-family: 'Orbitron', monospace;
  font-size: 18px; font-weight: 700;
  color: var(--gold);
  text-shadow: 0 0 12px var(--gold);
  letter-spacing: 3px; margin-bottom: 6px;
}
#stats-xp-label {
  font-size: 13px; color: var(--dimtext);
  letter-spacing: 2px; margin-bottom: 6px;
}
.xp-bar-wrap { display: flex; flex-direction: column; gap: 4px; }
.xp-bar-track {
  height: 6px; background: var(--dim);
  border-radius: 3px; overflow: hidden;
}
.xp-bar-fill {
  height: 100%; background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
  transition: width 1s cubic-bezier(.4,0,.2,1);
  border-radius: 3px;
}
#xp-rank-label, #stats-xp-next {
  font-size: 10px; color: var(--dimtext);
  letter-spacing: 2px; text-align: right;
}

/* ── Achievement grid ─────────────────────────────────── */
.achievement-grid {
  display: flex; flex-wrap: wrap;
  gap: 8px; justify-content: center;
  max-width: 480px;
}
.ach-item {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 8px 12px;
  border: 1px solid var(--dim);
  background: rgba(0,0,0,0.3);
  min-width: 70px;
}
.ach-item.unlocked {
  border-color: var(--gold);
  background: rgba(255,215,0,0.06);
}
.ach-icon { font-size: 20px; line-height: 1; }
.ach-label {
  font-family: 'Orbitron', monospace;
  font-size: 8px; font-weight: 700;
  letter-spacing: 1px; color: var(--dimtext);
  text-align: center;
}
.ach-item.unlocked .ach-label { color: var(--gold); }

/* ── Leaderboard ──────────────────────────────────────── */
#go-lb-list {
  display: flex; flex-direction: column;
  gap: 4px; min-width: 300px;
}
.lb-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 4px 10px;
  border-bottom: 1px solid rgba(51,68,102,0.5);
  font-size: 12px; letter-spacing: 1px;
}
.lb-rank { color: var(--dimtext); width: 20px; }
.lb-score { color: var(--cyan); font-family: 'Orbitron', monospace; font-weight: 700; }
.lb-chain { color: var(--gold); }
.lb-diff  { color: var(--dimtext); font-size: 10px; }
.lb-row:first-child .lb-score { color: var(--gold); text-shadow: 0 0 8px var(--gold); }

/* ── Achievement toast ────────────────────────────────── */
#achievement-toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%);
  font-family: 'Orbitron', monospace;
  font-size: 13px; font-weight: 700;
  color: var(--gold);
  background: rgba(10,10,26,0.92);
  border: 1px solid var(--gold);
  box-shadow: 0 0 20px rgba(255,215,0,0.3);
  padding: 10px 24px;
  letter-spacing: 3px;
  z-index: 50; pointer-events: none;
  white-space: nowrap;
}
@keyframes toastIn {
  0%   { opacity: 0; transform: translateX(-50%) translateY(20px); }
  15%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  75%  { opacity: 1; }
  100% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
}

/* ── Stats overlay (reuses overlay base class) ─────────── */
#overlay-stats { overflow-y: auto; gap: 16px; }
#stats-xp-section { margin-top: -4px; }

/* ── Daily challenge button states ───────────────────────*/
#btn-daily.done {
  border-color: var(--dim);
  color: var(--dimtext);
  opacity: 0.5;
  cursor: not-allowed;
}