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

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

/* ── Design tokens ────────────────────────────────────────────────────────── */
:root {
  --bg:            #03030c;
  --surface:       #07071a;
  --surface2:      #0d0d28;
  --border:        #1a1a45;
  --border-bright: #2a2a6a;

  --neon-cyan:   #00ffee;
  --neon-pink:   #ff0099;
  --neon-green:  #39ff14;
  --neon-yellow: #ffe600;
  --neon-orange: #ff6600;

  --text:  #dde6ff;
  --muted: #9090c8;

  --glow-cyan:  0 0 8px #00ffee, 0 0 20px rgba(0,255,238,0.4);
  --glow-pink:  0 0 8px #ff0099, 0 0 20px rgba(255,0,153,0.4);
  --glow-green: 0 0 8px #39ff14, 0 0 20px rgba(57,255,20,0.4);

  --font-display: "Orbitron", "Segoe UI", sans-serif;
  --font-mono:    "Share Tech Mono", "Courier New", monospace;
  --radius: 6px;
  --transition: 0.18s ease;
}

/* ── Base ─────────────────────────────────────────────────────────────────── */
html, body {
  height: 100%;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Retro grid background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,255,238,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,238,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* Scanline overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0,0,0,0.12) 3px,
    rgba(0,0,0,0.12) 4px
  );
  pointer-events: none;
  z-index: 0;
}

/* Everything sits above the overlays */
body > * { position: relative; z-index: 1; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

/* ── Utility ──────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

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

.error-msg {
  color: var(--neon-pink);
  text-shadow: var(--glow-pink);
  font-size: 0.8rem;
  text-align: center;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: box-shadow var(--transition), background-color var(--transition), transform var(--transition), opacity var(--transition);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn:active:not(:disabled) { transform: scale(0.96); }
.btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* Shimmer sweep on hover */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.12) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.4s ease;
}
.btn:hover:not(:disabled)::before { transform: translateX(100%); }

.btn-primary {
  background: transparent;
  border: 2px solid var(--neon-cyan);
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
  box-shadow: var(--glow-cyan), inset 0 0 16px rgba(0,255,238,0.08);
}
.btn-primary:hover:not(:disabled) {
  background: rgba(0,255,238,0.1);
  box-shadow: 0 0 16px #00ffee, 0 0 40px rgba(0,255,238,0.5), inset 0 0 20px rgba(0,255,238,0.15);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--border-bright);
  color: var(--text);
}
.btn-secondary:hover:not(:disabled) {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: var(--glow-cyan);
}

.btn-sm {
  padding: 0.35rem 0.85rem;
  font-size: 0.72rem;
}

/* ── Inputs ───────────────────────────────────────────────────────────────── */
input[type="text"] {
  width: 100%;
  padding: 0.6rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input[type="text"]::placeholder { color: var(--muted); }
input[type="text"]:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 0 1px var(--neon-cyan), var(--glow-cyan);
}

.input-group { margin-bottom: 0.75rem; }

/* ── Panel ────────────────────────────────────────────────────────────────── */
.panel { width: 100%; height: 100%; }

/* ── Overlay ──────────────────────────────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(3,3,12,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.3s ease;
  backdrop-filter: blur(4px);
}

.overlay-card {
  background: var(--surface);
  border: 1px solid var(--neon-cyan);
  border-radius: var(--radius);
  box-shadow: var(--glow-cyan), inset 0 0 40px rgba(0,255,238,0.04);
  padding: 2.5rem 3rem;
  text-align: center;
  max-width: 420px;
  width: 90%;
  animation: slideUp 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.result-icon { font-size: 3rem; margin-bottom: 0.5rem; }

.overlay-card h2 {
  font-size: 1.6rem;
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
  margin-bottom: 0.5rem;
}

.overlay-card p { color: var(--muted); margin-bottom: 0.4rem; font-family: var(--font-mono); }
.result-next { font-size: 0.78rem; color: var(--border-bright); margin-top: 1rem; }

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes slideUp {
  from { transform: translateY(30px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}