:root {
  --bg-deep: #0f1219;
  --bg-mid: #202734;
  --panel: #0b0f16cc;
  --text: #eff6ff;
  --muted: #9fb1c9;
  --accent: #2ee6a6;
  --accent-2: #ffcc66;
  --border: #2c3444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Space Grotesk", sans-serif;
  background: radial-gradient(circle at 15% 10%, #204066, transparent 45%),
    radial-gradient(circle at 80% 0%, #5f3f22, transparent 45%),
    linear-gradient(145deg, var(--bg-deep), var(--bg-mid));
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(120deg, #ffffff08 1px, transparent 1px),
    linear-gradient(25deg, #ffffff08 1px, transparent 1px);
  background-size: 70px 70px, 60px 60px;
  opacity: 0.4;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1rem 3rem;
}

.hero h1 {
  font-size: clamp(2rem, 5.2vw, 4rem);
  line-height: 1.02;
  margin: 0.2rem 0 0.8rem;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.12em;
  color: var(--accent-2);
  font-size: 0.8rem;
  font-family: "IBM Plex Mono", monospace;
}

.subhead {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.05rem;
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 18px;
  padding: 1rem;
  backdrop-filter: blur(5px);
  margin-top: 1rem;
}

form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
}

input,
select,
button {
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 0.7rem 0.8rem;
  font: inherit;
}

input,
select {
  background: #111828;
  color: var(--text);
}

button {
  background: linear-gradient(90deg, var(--accent), #4be5ff);
  color: #0f1a23;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  transform: translateY(-1px);
}

button,
.panel {
  transition: transform 0.2s ease, opacity 0.2s ease;
}

button,
#trial-result {
  grid-column: 1 / -1;
}

.result {
  min-height: 1.25rem;
  color: var(--accent-2);
  font-family: "IBM Plex Mono", monospace;
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

ul {
  padding-left: 1.2rem;
}

pre {
  font-family: "IBM Plex Mono", monospace;
  white-space: pre-wrap;
  word-break: break-word;
  background: #0b1423;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem;
  min-height: 180px;
}

.footer {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.footer a {
  color: var(--muted);
}

@media (max-width: 760px) {
  form,
  .grid {
    grid-template-columns: 1fr;
  }
}