/* =========================================================
   Tokens
========================================================= */
:root {
  --bg-0: #050709;
  --bg-1: #0a0e14;

  --neon-cyan: #00f0ff;
  --neon-cyan-soft: rgba(0, 240, 255, 0.5);
  --neon-pink: #ff2d9c;
  --neon-pink-soft: rgba(255, 45, 156, 0.5);
  --neon-green: #00ff9c;

  --text: #e8fbff;
  --text-dim: rgba(232, 251, 255, 0.55);
  --text-mute: rgba(232, 251, 255, 0.3);

  --grid: rgba(0, 240, 255, 0.06);
  --line: rgba(0, 240, 255, 0.12);

  --glow-cyan-sm: 0 0 6px rgba(0, 240, 255, 0.6), 0 0 16px rgba(0, 240, 255, 0.3);
  --glow-cyan-md: 0 0 10px rgba(0, 240, 255, 0.7), 0 0 28px rgba(0, 240, 255, 0.35);
  --glow-pink-sm: 0 0 6px rgba(255, 45, 156, 0.6), 0 0 16px rgba(255, 45, 156, 0.3);
  --glow-green:   0 0 8px rgba(0, 255, 156, 0.7), 0 0 18px rgba(0, 255, 156, 0.4);

  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Monaco, Consolas, monospace;
}

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

html { -webkit-text-size-adjust: 100%; }

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--font-mono);
  font-feature-settings: "ss01", "ss02", "calt";
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* =========================================================
   Background layers
========================================================= */
.bg-grid,
.bg-glow,
.scanlines,
.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-grid {
  z-index: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 40%, transparent 100%);
  animation: gridDrift 30s linear infinite;
}

@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 44px 44px, 44px 44px; }
}

.bg-glow {
  z-index: 0;
  background:
    radial-gradient(ellipse 65% 45% at 50% 38%, rgba(0, 240, 255, 0.14), transparent 70%),
    radial-gradient(ellipse 45% 35% at 82% 78%, rgba(255, 45, 156, 0.10), transparent 70%),
    radial-gradient(ellipse 40% 30% at 18% 80%, rgba(0, 255, 156, 0.06), transparent 70%);
  animation: glowPulse 7s ease-in-out infinite alternate;
}

@keyframes glowPulse {
  from { opacity: 0.75; transform: scale(1); }
  to   { opacity: 1;    transform: scale(1.04); }
}

.scanlines {
  z-index: 1;
  background: repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 3px,
    rgba(0, 240, 255, 0.018) 3px,
    rgba(0, 240, 255, 0.018) 4px
  );
  mix-blend-mode: screen;
}

.vignette {
  z-index: 1;
  background: radial-gradient(ellipse 100% 100% at 50% 50%, transparent 55%, rgba(0,0,0,0.55) 100%);
}

/* =========================================================
   Topbar
========================================================= */
.topbar {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.15rem 1.75rem;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.logo {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
}

.logo-bracket {
  color: var(--neon-pink);
  text-shadow: var(--glow-pink-sm);
}

.logo-text {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan-sm);
}

.logo-cursor {
  margin-left: 0.3rem;
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan-sm);
  animation: blink 1.1s steps(2) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  background: rgba(0, 240, 255, 0.02);
}

.lang-btn {
  color: var(--text-mute);
  padding: 0.1rem 0.2rem;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.lang-btn:hover { color: var(--text); }

.lang-btn.active {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan-sm);
}

.lang-sep { color: var(--text-mute); }

/* =========================================================
   Stage
========================================================= */
.stage {
  position: relative;
  z-index: 2;
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem 1.5rem 3rem;
  overflow-y: auto;
}

.prompt {
  width: min(100%, 56rem);
  font-size: clamp(1.15rem, 4.6vw, 2.5rem);
  line-height: 1.45;
  font-weight: 500;
  letter-spacing: -0.005em;
  min-height: 2.6em;
  /* Inline flow (not flex) so $ + text render as one continuous run.
     Line breaks happen only at whitespace inside .prompt-text — never
     between $ and the first word. */
}

.prompt-prefix {
  color: var(--neon-pink);
  text-shadow: var(--glow-pink-sm);
  margin-right: 0.45em;
}

.prompt-text {
  color: var(--text);
  text-shadow: 0 0 12px rgba(0, 240, 255, 0.35);
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

.prompt-cursor {
  display: inline-block;
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan-md);
  animation: blink 1.1s steps(2) infinite;
  transform: translateY(-0.05em);
}

.prompt-cursor.hidden { display: none; }

/* Answers */
.answers {
  margin-top: 2.25rem;
  width: min(100%, 56rem);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.answer-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  text-align: left;
  padding: 0.95rem 1.15rem;
  font-size: clamp(0.92rem, 2.6vw, 1.05rem);
  color: var(--text);
  background: rgba(0, 240, 255, 0.035);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease,
    text-shadow 0.2s ease;
  opacity: 0;
  transform: translateY(8px);
  animation: answerIn 0.45s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.answer-btn::before {
  content: '>';
  color: var(--neon-pink);
  text-shadow: var(--glow-pink-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.answer-btn:hover,
.answer-btn:focus-visible {
  background: rgba(0, 240, 255, 0.08);
  border-color: var(--neon-cyan-soft);
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan-sm);
  box-shadow: var(--glow-cyan-sm);
  transform: translateX(4px);
  outline: none;
}

@keyframes answerIn {
  to { opacity: 1; transform: translateY(0); }
}

/* =========================================================
   Bottombar
========================================================= */
.bottombar {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 1.75rem;
  border-top: 1px solid var(--line);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.status { display: inline-flex; align-items: center; gap: 0.55rem; }

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: var(--glow-green);
  animation: pulseDot 1.6s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.45; transform: scale(0.85); }
}

.meta { color: var(--text-mute); }

/* =========================================================
   Mobile
========================================================= */
@media (max-width: 640px) {
  .topbar    { padding: 0.95rem 1.1rem; }
  .bottombar { padding: 0.7rem 1.1rem; gap: 0.5rem; }
  .logo      { font-size: 0.78rem; }
  .stage     { padding: 1.5rem 1.1rem 2rem; }
  .bg-grid   { background-size: 32px 32px; }
  .meta      { display: none; }
}

/* =========================================================
   Reduced motion
========================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}