:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #6ee7b7;
  --warn: #fbbf24;
  --danger: #f87171;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse at 20% 0%, #1e3a5f 0%, var(--bg) 55%);
  color: var(--text);
}

.top {
  padding: 2rem 1.5rem 1rem;
  max-width: 960px;
  margin: 0 auto;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 0.35rem;
}

.tagline {
  color: var(--muted);
  max-width: 42rem;
  margin: 0;
}

.grid {
  display: grid;
  gap: 1.25rem;
  padding: 1rem 1.5rem 2rem;
  max-width: 960px;
  margin: 0 auto;
}

@media (min-width: 720px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1.25rem;
}

.panel h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}

.hint {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 1rem;
}

label span { display: block; font-size: 0.85rem; margin-bottom: 0.35rem; }

textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text);
  padding: 0.65rem;
  font-family: var(--font);
  resize: vertical;
}

button {
  margin-top: 0.75rem;
  background: var(--accent);
  color: #0f1419;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover { filter: brightness(1.05); }

.memory-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.memory-list li {
  background: var(--bg);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  border-left: 3px solid var(--accent);
}

.memory-list time {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.slider-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.slider-row span { grid-column: 1 / -1; }

input[type="range"] { width: 100%; grid-column: 1 / 2; }

output {
  font-family: var(--mono);
  font-size: 0.85rem;
  min-width: 2.5rem;
  text-align: right;
}

.gauge-wrap { margin-top: 1rem; }

.gauge-bar {
  height: 12px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
}

.gauge-fill {
  height: 100%;
  width: 50%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.2s ease, background 0.2s ease;
}

.gauge-label {
  margin: 0.5rem 0 0;
  font-weight: 600;
}

.formula {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin: 1rem 0 0;
}

.hero-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  margin-top: 0.75rem;
  font-size: 0.85rem;
}

.hero-links a {
  color: var(--accent);
  text-decoration: none;
}

.hero-links a:hover {
  text-decoration: underline;
}

.foot {
  text-align: center;
  padding: 1rem;
  color: var(--muted);
  font-size: 0.8rem;
}