/* =========================================================================
   BLOCK RUSH — STYLES
   Design tokens: deep-space void background, cyan/violet neon accents,
   Orbitron for display type, Rajdhani for body/UI type.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;900&family=Rajdhani:wght@500;600;700&display=swap');

:root{
  --bg-void:   #05060f;
  --bg-deep:   #0a0e21;
  --panel-bg:  rgba(10, 14, 33, .82);

  --neon-blue:      #00e5ff;
  --neon-blue-dim:  #0891b2;
  --neon-purple:    #b026ff;
  --neon-purple-dim:#7c2ae8;

  --valid-green: #39ff88;
  --danger-red:  #ff3860;
  --gold:        #ffd76a;

  --text-light: #eaf6ff;
  --text-dim:   #7d8bb0;

  --font-display: 'Orbitron', 'Segoe UI', sans-serif;
  --font-body: 'Rajdhani', 'Segoe UI', sans-serif;

  --radius: 10px;
}

*{ box-sizing: border-box; }

html, body{
  margin:0; padding:0;
  width:100%; height:100%;
  overflow:hidden;
  background: var(--bg-void);
  font-family: var(--font-body);
  color: var(--text-light);
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
}

#gameCanvas{
  position:fixed; inset:0;
  display:block;
  width:100%; height:100%;
  background: radial-gradient(ellipse at 50% 20%, #0d1330 0%, var(--bg-void) 70%);
}

.hidden{ display:none !important; }
.sr-only{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}

/* ============================= HUD ============================= */
#hud{
  position:fixed; top:0; left:0; right:0;
  display:flex; align-items:flex-start; justify-content:space-between;
  gap:12px;
  padding:14px 18px;
  z-index:20;
  pointer-events:none; /* only buttons get pointer events */
}

.hud-left, .hud-right{
  display:flex; align-items:center; gap:16px;
}

.hud-stat{
  display:flex; flex-direction:column; align-items:flex-start;
  padding:6px 14px;
  background: rgba(8,10,24,.55);
  border:1px solid rgba(0,229,255,.25);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  min-width:84px;
}
.hud-stat--sub{ opacity:.75; min-width:64px; padding:6px 10px; }

.hud-label{
  font-size:.62rem; letter-spacing:.14em; text-transform:uppercase;
  color: var(--text-dim); font-weight:600;
}
.hud-value{
  font-family: var(--font-display);
  font-size:1.5rem; font-weight:700;
  color: var(--neon-blue);
  text-shadow: 0 0 12px rgba(0,229,255,.6);
  line-height:1.3;
}
.hud-value--sub{ font-size:1.05rem; color:var(--gold); text-shadow:0 0 10px rgba(255,215,106,.55); }

.hud-center{
  display:flex; gap:8px; flex-wrap:wrap; justify-content:center;
  align-self:flex-start;
  margin-top:2px;
}
.powerup-chip{
  pointer-events:none;
  display:flex; align-items:center; gap:6px;
  padding:5px 10px 5px 8px;
  border-radius:999px;
  background: rgba(8,10,24,.6);
  border:1px solid rgba(255,215,106,.5);
  font-size:.72rem; font-weight:700; letter-spacing:.03em;
  color: var(--gold);
  box-shadow:0 0 12px rgba(255,215,106,.25);
  overflow:hidden;
  position:relative;
}
.powerup-chip .bar{
  position:absolute; left:0; bottom:0; height:3px;
  background: var(--gold); box-shadow:0 0 8px var(--gold);
  width:100%;
  transform-origin:left;
}

.lives{ display:flex; gap:6px; pointer-events:none; }
.life-node{
  width:20px; height:20px;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  clip-path: polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%);
  box-shadow:0 0 8px rgba(0,229,255,.7);
  transition: opacity .25s, transform .25s, filter .25s;
}
.life-node.lost{
  opacity:.18; filter:grayscale(1);
  box-shadow:none;
  transform:scale(.8) rotate(20deg);
}

.hud-buttons{ display:flex; gap:8px; }
.icon-btn{
  pointer-events:auto;
  width:38px; height:38px;
  display:flex; align-items:center; justify-content:center;
  background: rgba(8,10,24,.6);
  border:1px solid rgba(0,229,255,.35);
  border-radius:50%;
  color: var(--neon-blue);
  cursor:pointer;
  transition: background .15s, transform .15s, box-shadow .15s;
}
.icon-btn svg{ width:18px; height:18px; }
.icon-btn:hover{ background: rgba(0,229,255,.15); box-shadow:0 0 14px rgba(0,229,255,.5); }
.icon-btn:active{ transform:scale(.92); }
.icon-btn .icon-off{ display:none; }
.icon-btn.muted .icon-on{ display:none; }
.icon-btn.muted .icon-off{ display:block; }

/* ========================== OVERLAYS / MENUS ========================== */
.overlay{
  position:fixed; inset:0; z-index:30;
  display:flex; align-items:center; justify-content:center;
  padding:20px;
  background: radial-gradient(circle at 50% 30%, rgba(20,20,50,.55), rgba(3,4,10,.92) 70%);
  backdrop-filter: blur(3px);
  animation: fadeIn .35s ease;
}
@keyframes fadeIn{ from{opacity:0;} to{opacity:1;} }

.panel{
  width:100%; max-width:400px;
  background: var(--panel-bg);
  border:1px solid rgba(0,229,255,.3);
  border-radius:16px;
  padding:32px 28px;
  text-align:center;
  box-shadow: 0 0 0 1px rgba(176,38,255,.15), 0 30px 80px rgba(0,0,0,.6), 0 0 60px rgba(0,229,255,.08);
  animation: riseIn .4s cubic-bezier(.2,.9,.25,1);
}
.panel--wide{ max-width:520px; padding:36px 32px; }

@keyframes riseIn{
  from{ transform:translateY(24px) scale(.97); opacity:0; }
  to{ transform:translateY(0) scale(1); opacity:1; }
}

.brand{ display:flex; align-items:center; justify-content:center; gap:12px; margin-bottom:6px; }
.brand-glyph{ width:40px; height:40px; color:var(--neon-blue); filter:drop-shadow(0 0 10px rgba(0,229,255,.7)); }
.brand-glyph svg{ width:100%; height:100%; }

h1{
  font-family:var(--font-display);
  font-size:2.4rem; font-weight:900; letter-spacing:.04em;
  margin:0;
  color:var(--text-light);
  text-shadow:0 0 18px rgba(0,229,255,.5);
}
h1 span{
  color:var(--neon-purple);
  text-shadow:0 0 18px rgba(176,38,255,.8);
}

.tagline{
  margin:6px 0 22px;
  color:var(--text-dim);
  font-size:1rem; letter-spacing:.03em;
}

.brief-grid{
  display:grid; grid-template-columns:1fr; gap:10px;
  margin-bottom:24px; text-align:left;
}
.brief-card{
  display:flex; align-items:center; gap:12px;
  padding:10px 12px;
  border:1px solid rgba(255,255,255,.08);
  border-radius:10px;
  background:rgba(255,255,255,.02);
}
.brief-card p{ margin:0; font-size:.85rem; color:var(--text-dim); line-height:1.3; }

.chip{
  flex:0 0 auto;
  font-family:var(--font-display);
  font-size:.6rem; font-weight:700; letter-spacing:.06em;
  padding:5px 8px; border-radius:6px;
  white-space:nowrap;
}
.chip--valid{ color:#04160c; background:var(--valid-green); box-shadow:0 0 10px rgba(57,255,136,.6); }
.chip--fake{ color:#200008; background:var(--danger-red); box-shadow:0 0 10px rgba(255,56,96,.6); }
.chip--gold{ color:#241900; background:var(--gold); box-shadow:0 0 10px rgba(255,215,106,.6); }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  width:100%;
  padding:14px 20px;
  margin-top:8px;
  border-radius:10px;
  border:1px solid transparent;
  font-family:var(--font-display);
  font-size:.95rem; font-weight:700; letter-spacing:.06em;
  text-transform:uppercase;
  cursor:pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:active{ transform:scale(.97); }

.btn--primary{
  color:#02131a;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  box-shadow:0 0 20px rgba(0,229,255,.45), 0 8px 24px rgba(176,38,255,.25);
}
.btn--primary:hover{ box-shadow:0 0 28px rgba(0,229,255,.7), 0 8px 30px rgba(176,38,255,.4); }

.btn--ghost{
  color:var(--text-light);
  background:transparent;
  border-color:rgba(255,255,255,.18);
}
.btn--ghost:hover{ background:rgba(255,255,255,.06); border-color:rgba(255,255,255,.35); }

.controls-hint{
  margin-top:20px;
  display:flex; align-items:center; justify-content:center;
  gap:8px; flex-wrap:wrap;
  color:var(--text-dim); font-size:.8rem;
}
.kbd-row{ display:flex; gap:4px; }
kbd{
  font-family:var(--font-display);
  font-size:.68rem;
  min-width:22px; text-align:center;
  padding:4px 6px;
  border-radius:5px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.18);
  border-bottom-width:2px;
  color:var(--text-light);
}
.hint-or{ opacity:.6; font-size:.75rem; }

.best-line{
  margin:18px 0 0; color:var(--text-dim); font-size:.85rem;
}
.best-line strong{ color:var(--gold); }

.panel-title{
  font-family:var(--font-display);
  font-size:1.4rem; letter-spacing:.05em;
  margin:0 0 18px;
  color:var(--text-light);
  text-shadow:0 0 14px rgba(0,229,255,.4);
}
.panel-title--danger{ color:var(--danger-red); text-shadow:0 0 16px rgba(255,56,96,.6); }

.go-sub{ color:var(--text-dim); margin:-8px 0 18px; font-size:.88rem; }

.go-stats{
  display:flex; justify-content:center; gap:28px;
  margin-bottom:8px;
}
.go-stats > div{ display:flex; flex-direction:column; }
.go-label{ font-size:.68rem; letter-spacing:.1em; text-transform:uppercase; color:var(--text-dim); }
.go-value{
  font-family:var(--font-display); font-weight:700;
  font-size:1.9rem; color:var(--neon-blue);
  text-shadow:0 0 14px rgba(0,229,255,.55);
}
.new-record{
  color:var(--gold); font-weight:700; letter-spacing:.04em;
  font-size:.85rem; margin:6px 0 18px;
  animation: pulseGold 1.1s ease-in-out infinite;
}
@keyframes pulseGold{
  0%,100%{ opacity:1; } 50%{ opacity:.5; }
}

#pauseScreen .btn, #gameOverScreen .btn{ margin-top:10px; }

/* ============================ RESPONSIVE ============================ */
@media (max-width:560px){
  h1{ font-size:1.9rem; }
  .panel{ padding:26px 20px; }
  .panel--wide{ padding:26px 20px; }
  .hud-stat{ min-width:64px; padding:5px 10px; }
  .hud-value{ font-size:1.15rem; }
  .hud-center{ position:fixed; top:64px; left:0; right:0; }
  #hud{ padding:10px 12px; }
  .hint-mobile{ display:inline; }
}
@media (min-width:561px){
  .hint-mobile{ display:none; }
}
@media (min-width:640px){
  .brief-grid{ grid-template-columns:1fr; }
}

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}