:root {
  /* Optimistic retro-futurist palette: pastel + neon */
  --rf-bg-gradient: linear-gradient(115deg, #3e4ea0 0%, #7edbff 50%, #ffe6fa 100%);
  --rf-neon-green: #5cffb6;
  --rf-neon-blue: #55c6ff;
  --rf-neon-pink: #fd7cff;
  --rf-neon-yellow: #fff99e;
  --rf-neon-orange: #ffd27a;
  --rf-neon-purple: #bda4ff;
  --rf-white: #ffffff;
  --rf-mid-bg: #f7f6ff;
  --rf-accent: #347A00;
  --rf-header-font: 'Smooch', cursive;
  --rf-ui-font: 'Orbitron', 'Fira Mono', Arial, sans-serif;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background: var(--rf-bg-gradient);
  color: #222c44;
  font-family: var(--rf-ui-font);
  font-size: 18px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: repeating-linear-gradient(
    to bottom, transparent 0px, #55c6ff22 2px, transparent 40px
  ), 
  repeating-linear-gradient(
    to right, transparent 0px, #bda4ff22 2px, transparent 40px
  );
  opacity: 0.12;
  z-index: 0;
  pointer-events: none;
}

/* Links */
a {
  color: var(--rf-neon-blue);
  text-decoration: none;
  transition: color 0.18s;
  font-weight: 600;
}
a:hover {
  color: var(--rf-neon-pink);
  text-shadow: 0 0 8px var(--rf-neon-pink);
}

/* Buttons */
.button {
  font-family: var(--rf-ui-font);
  background: linear-gradient(90deg, var(--rf-neon-yellow) 0%, var(--rf-neon-blue) 100%);
  color: #232b33;
  border: none;
  border-radius: 2em;
  padding: 0.6em 1.4em;
  font-size: 1em;
  font-weight: 700;
  box-shadow: 0 2px 16px #bda4ff55;
  cursor: pointer;
  transition: background 0.19s, color 0.19s, box-shadow 0.19s;
}
.button:hover {
  background: linear-gradient(90deg, var(--rf-neon-pink) 0%, var(--rf-neon-blue) 100%);
  color: var(--rf-white);
  box-shadow: 0 2px 24px #fd7cff66;
}

/* Forms */
.input, .textarea, .select select {
  background: #f7f6ff;
  color: #262b33;
  border: 2px solid var(--rf-neon-blue);
  font-family: var(--rf-ui-font);
  padding: 0.5em 1em;
  font-size: 1em;
  margin-bottom: 1.1em;
  transition: border-color 0.18s;
}
.input:focus, .textarea:focus, .select select:focus {
  border-color: var(--rf-neon-pink);
  outline: none;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  letter-spacing: 0.07em;
  color: var(--rf-neon-blue);
  margin-top: 1.2em;
  margin-bottom: 0.7em;
}
h1 {
    font-family: var(--rf-header-font);
  font-size: 5em;
  color: var(--rf-neon-pink);
  text-shadow: 0 0 8px var(--rf-neon-pink), 0 0 42px var(--rf-neon-yellow);
}
h2 {
  font-size: 2.2em;
  color: var(--rf-neon-blue);
}
h3 {
  font-size: 1.6em;
  color: var(--rf-neon-yellow);
}
h4, h5, h6 {
  color: var(--rf-neon-purple);
}

/* Cards, panels, sections */
.card, .panel, section {
  background: #ffffffcc;
  border: 2px solid var(--rf-neon-blue);
  box-shadow: 0 2px 24px #bda4ff33;
  padding: 1.5em 1.2em;
  margin-bottom: 2em;
  position: relative;
  z-index: 1;
}

/* Accent line */
.rf-accent-line {
  display: block;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--rf-neon-yellow), var(--rf-neon-blue), var(--rf-neon-pink));
  margin: 1em 0;
}

/* Neon text utility */
.rf-neon {
  color: var(--rf-neon-pink);
  text-shadow: 0 0 8px var(--rf-neon-pink), 0 0 22px var(--rf-neon-yellow);
}
.rf-neon-blue {
  color: var(--rf-neon-blue);
  text-shadow: 0 0 8px var(--rf-neon-blue), 0 0 22px var(--rf-neon-yellow);
}
.rf-neon-yellow {
  color: var(--rf-neon-yellow);
  text-shadow: 0 0 8px var(--rf-neon-yellow), 0 0 18px var(--rf-neon-blue);
}

/* Responsive */
@media (max-width: 700px) {
  html, body {
    font-size: 16px;
  }
  h1 { font-size: 2em; }
  h2 { font-size: 1.4em; }
  h3 { font-size: 1.1em; }
  .card, .panel, section {
    padding: 1em 0.5em;
  }
}

/* Utility classes */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex-space-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2em;
}
.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2em;
}

::-webkit-scrollbar {
  width: 8px;
  background: #f7f6ff;
}
::-webkit-scrollbar-thumb {
  background: var(--rf-neon-blue);
}