/* ═══════════════════════════════════════════════
   NEON DASH — Futuristic 2.5D Runner
   Vektor Web Games
═══════════════════════════════════════════════ */

:root {
  --nd-bg: #061830;
  --nd-bg2: #0a2a50;
  --nd-cyan: #00d4ff;
  --nd-violet: #7c4dff;
  --nd-green: #00e676;
  --nd-pink: #ff0080;
  --nd-gold: #ffd700;
  --nd-text: #e0eeff;
  --nd-muted: rgba(224,238,255,0.5);
  --nd-dim: rgba(224,238,255,0.2);
  --nd-glow-c: rgba(0,212,255,0.35);
  --nd-glow-v: rgba(124,77,255,0.35);
  --nd-card: rgba(8,24,48,0.88);
  --nd-border: rgba(0,212,255,0.15);
  --nd-radius: 10px;
  --nd-font: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  --nd-mono: 'Space Mono', 'Courier New', monospace;
}

/* ── GAME PAGE: force no-scroll layout ── */
html, body {
  height: 100vh;
  overflow: hidden;
  margin: 0;
}
body {
  zoom: 1;  /* override vk-theme zoom — game needs full viewport */
}
.topbar .brand img { height: 36px; }
.topbar .brand .mascot { height: 32px; }

/* ── WRAPPER ── */
.nd-wrapper {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  background: var(--nd-bg);
  overflow: hidden;
}

/* ── HUD ── */
.nd-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1.2rem;
  background: linear-gradient(180deg, rgba(6,24,48,0.95) 0%, rgba(4,16,32,0.9) 100%);
  border-bottom: 1px solid var(--nd-border);
  z-index: 10;
}
.nd-hud-left { display: flex; align-items: center; gap: 0.75rem; }
.nd-back {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: rgba(0,212,255,0.08); border: 1px solid var(--nd-border);
  color: var(--nd-cyan); transition: all 0.2s;
}
.nd-back:hover { background: rgba(0,212,255,0.18); box-shadow: 0 0 12px var(--nd-glow-c); }
.nd-logo {
  font-family: var(--nd-font);
  font-size: 1.3rem; font-weight: 700;
  letter-spacing: 3px;
  color: var(--nd-text);
}
.nd-logo span {
  background: linear-gradient(90deg, var(--nd-cyan), var(--nd-violet));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nd-hud-stats { display: flex; gap: 1.5rem; }
.nd-stat { display: flex; flex-direction: column; align-items: center; }
.nd-stat-label {
  font-family: var(--nd-mono);
  font-size: 0.55rem; color: var(--nd-muted);
  letter-spacing: 0.15em; text-transform: uppercase;
}
.nd-stat-val {
  font-family: var(--nd-mono);
  font-size: 1rem; font-weight: 700; color: var(--nd-text);
}
.nd-stat-best .nd-stat-val {
  background: linear-gradient(90deg, var(--nd-gold), #ffaa00);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── STAGE ── */
.nd-stage {
  flex: 1;
  min-height: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--nd-bg2);
}
.nd-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
}

/* ── OVERLAYS ── */
.nd-ov {
  position: absolute; inset: 0; z-index: 20;
  display: flex; align-items: center; justify-content: center;
  background: rgba(4,12,28,0.85);
  backdrop-filter: blur(8px);
  animation: ndFadeIn 0.3s ease;
}
.nd-ov.nd-hidden { display: none; }
@keyframes ndFadeIn { from { opacity:0 } to { opacity:1 } }

.nd-ov-inner {
  text-align: center;
  padding: 2.5rem 2rem;
  max-width: 480px;
  width: 90%;
}

/* ── START SCREEN ── */
.nd-title-block { margin-bottom: 0.5rem; }
.nd-t1 {
  font-family: var(--nd-font);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800; letter-spacing: 8px;
  color: var(--nd-text);
  text-shadow: 0 0 30px var(--nd-glow-c), 0 0 60px rgba(0,212,255,0.15);
  line-height: 1;
}
.nd-t2 {
  font-family: var(--nd-font);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800; letter-spacing: 8px;
  background: linear-gradient(90deg, var(--nd-cyan), var(--nd-violet), var(--nd-pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  filter: drop-shadow(0 0 20px var(--nd-glow-v));
}
.nd-tagline {
  font-family: var(--nd-mono);
  font-size: 0.75rem; color: var(--nd-muted);
  letter-spacing: 0.15em; margin: 1rem 0 2rem;
}

/* ── BUTTONS ── */
.nd-btns { display: flex; flex-direction: column; gap: 0.6rem; align-items: center; }
.nd-btn {
  font-family: var(--nd-font);
  font-size: 0.85rem; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  padding: 0.85rem 2.5rem;
  border: none; border-radius: var(--nd-radius);
  cursor: pointer; transition: all 0.25s;
  min-width: 220px;
}
.nd-btn-primary {
  background: linear-gradient(135deg, var(--nd-cyan), var(--nd-violet));
  color: #fff;
  box-shadow: 0 4px 24px var(--nd-glow-c), 0 0 40px rgba(124,77,255,0.15);
}
.nd-btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 32px var(--nd-glow-c), 0 0 60px rgba(124,77,255,0.25);
}
.nd-btn-ghost {
  background: transparent;
  color: var(--nd-muted);
  border: 1px solid var(--nd-border);
}
.nd-btn-ghost:hover {
  color: var(--nd-cyan);
  border-color: var(--nd-cyan);
  box-shadow: 0 0 16px var(--nd-glow-c);
}

.nd-hint {
  display: flex; justify-content: center; gap: 1.5rem;
  margin-top: 1.5rem;
  font-family: var(--nd-mono);
  font-size: 0.6rem; color: var(--nd-dim);
}
.nd-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0,212,255,0.1);
  border: 1px solid var(--nd-border);
  color: var(--nd-cyan);
  font-family: var(--nd-mono);
  font-size: 0.6rem;
}

/* ── HELP ── */
.nd-help h3 {
  font-family: var(--nd-font);
  font-size: 1.6rem; font-weight: 700;
  color: var(--nd-text); margin-bottom: 1.5rem;
}
.nd-help-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0.8rem; margin-bottom: 1.5rem; text-align: left;
}
.nd-help-item {
  display: flex; align-items: flex-start; gap: 0.65rem;
  padding: 0.75rem; border-radius: 8px;
  background: rgba(0,212,255,0.04);
  border: 1px solid var(--nd-border);
}
.nd-hi-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 2px; }
.nd-help-item strong {
  font-family: var(--nd-font);
  color: var(--nd-text); font-size: 0.8rem;
}
.nd-help-item p {
  font-size: 0.65rem; color: var(--nd-muted); line-height: 1.4; margin-top: 2px;
}

/* ── PAUSE ── */
.nd-pause h3 {
  font-family: var(--nd-font);
  font-size: 2rem; font-weight: 700;
  color: var(--nd-text); margin-bottom: 1.5rem;
  letter-spacing: 4px;
}
.nd-pause .nd-btn { margin-bottom: 0.5rem; }

/* ── PHASE TRANSITION ── */
.nd-phase { animation: ndPhaseIn 0.5s ease; }
@keyframes ndPhaseIn {
  from { opacity:0; transform:scale(0.6) }
  to { opacity:1; transform:scale(1) }
}
.nd-phase-ring {
  width: 100px; height: 100px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1rem;
  background: conic-gradient(var(--nd-cyan), var(--nd-violet), var(--nd-pink), var(--nd-cyan));
  animation: ndRingSpin 2s linear infinite;
  position: relative;
}
.nd-phase-ring::after {
  content: '';
  position: absolute; inset: 4px;
  border-radius: 50%;
  background: var(--nd-bg);
}
.nd-phase-ring span {
  position: relative; z-index: 1;
  font-family: var(--nd-font);
  font-size: 2.5rem; font-weight: 800;
  color: var(--nd-cyan);
}
@keyframes ndRingSpin { to { transform: rotate(360deg) } }
.nd-phase h3 {
  font-family: var(--nd-font);
  font-size: 1.6rem; font-weight: 700;
  color: var(--nd-text); letter-spacing: 4px;
}
.nd-phase p {
  font-family: var(--nd-mono);
  font-size: 0.7rem; color: var(--nd-muted);
  margin-top: 0.3rem;
}

/* ── GAME OVER ── */
.nd-gameover h3 {
  font-family: var(--nd-font);
  font-size: 2.2rem; font-weight: 800;
  letter-spacing: 4px; margin-bottom: 1.2rem;
  background: linear-gradient(90deg, var(--nd-pink), var(--nd-violet));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nd-go-main {
  display: flex; flex-direction: column;
  margin-bottom: 1rem;
}
.nd-go-main .nd-go-label {
  font-family: var(--nd-mono);
  font-size: 0.65rem; color: var(--nd-muted);
  letter-spacing: 0.15em; text-transform: uppercase;
}
.nd-go-main .nd-go-val {
  font-family: var(--nd-font);
  font-size: 3rem; font-weight: 800;
  color: var(--nd-text);
  text-shadow: 0 0 20px var(--nd-glow-c);
}
.nd-go-row {
  display: flex; justify-content: center; gap: 1.5rem;
  margin-bottom: 1rem;
}
.nd-go-stat {
  display: flex; flex-direction: column; align-items: center;
  padding: 0.6rem 1rem;
  background: rgba(0,212,255,0.04);
  border: 1px solid var(--nd-border);
  border-radius: 8px;
}
.nd-go-stat .nd-go-label {
  font-family: var(--nd-mono);
  font-size: 0.55rem; color: var(--nd-muted);
  letter-spacing: 0.1em; text-transform: uppercase;
}
.nd-go-stat .nd-go-val {
  font-family: var(--nd-font);
  font-size: 1.2rem; font-weight: 700; color: var(--nd-text);
}
.nd-go-stat .nd-go-val.nd-best {
  background: linear-gradient(90deg, var(--nd-gold), #ffaa00);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nd-new-record {
  font-family: var(--nd-font);
  font-size: 1rem; font-weight: 700;
  letter-spacing: 3px;
  background: linear-gradient(90deg, var(--nd-gold), #ffaa00, var(--nd-gold));
  background-size: 200% 100%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: ndShimmer 1.5s linear infinite;
  margin-bottom: 1rem;
}
.nd-hidden { display: none !important; }
@keyframes ndShimmer { 0%{background-position:200% 0} 100%{background-position:-200% 0} }

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .nd-hud { padding: 0.4rem 0.8rem; }
  .nd-logo { font-size: 1rem; letter-spacing: 2px; }
  .nd-hud-stats { gap: 0.8rem; }
  .nd-stat-val { font-size: 0.85rem; }
  .nd-t1, .nd-t2 { letter-spacing: 4px; }
  .nd-help-grid { grid-template-columns: 1fr; }
  .nd-hint { flex-direction: column; gap: 0.5rem; }
  .nd-go-row { gap: 0.8rem; }
  .nd-go-main .nd-go-val { font-size: 2.2rem; }
  .nd-btn { min-width: 180px; padding: 0.75rem 2rem; }
}