@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;700&family=Noto+Sans+SC:wght@400;500;700&display=swap");

.lt-page {
  --lt-bg: #f5f7fb;
  --lt-card: #ffffff;
  --lt-ink: #1f2a37;
  --lt-muted: #5c6b7d;
  --lt-accent: #0f766e;
  --lt-accent-2: #0ea5e9;
  --lt-line: #d7dee8;
  font-family: "Noto Sans SC", "Space Grotesk", sans-serif;
  color: var(--lt-ink);
  background: radial-gradient(circle at 20% 0%, #e7f7f5 0%, var(--lt-bg) 45%);
  min-height: 100vh;
  padding: 20px;
}

.lt-hero {
  max-width: 1100px;
  margin: 0 auto 16px;
  padding: 24px;
  border-radius: 16px;
  background: linear-gradient(120deg, #083344 0%, #155e75 52%, #2563eb 100%);
  color: #f8fafc;
  box-shadow: 0 14px 30px rgba(8, 51, 68, 0.22);
}

.lt-hero h1 {
  margin: 0 0 8px;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  font-size: clamp(1.4rem, 3.2vw, 2.2rem);
}

.lt-hero p {
  margin: 0;
  opacity: 0.95;
}

.lt-main {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.lt-card {
  background: var(--lt-card);
  border: 1px solid var(--lt-line);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 8px 22px rgba(31, 42, 55, 0.06);
}

.lt-card h2 {
  margin: 0 0 8px;
  font-size: 1.2rem;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
}

.lt-muted {
  color: var(--lt-muted);
}

.lt-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1.3fr 1fr;
  gap: 12px;
}

.lt-controls,
.lt-output {
  background: #f8fafc;
  border: 1px solid var(--lt-line);
  border-radius: 10px;
  padding: 12px;
}

.lt-controls label {
  display: block;
  margin: 10px 0 6px;
  font-size: 0.9rem;
  color: var(--lt-muted);
}

.lt-controls textarea,
.lt-controls select,
.lt-controls input[type="range"] {
  width: 100%;
}

.lt-controls textarea,
.lt-controls select {
  border: 1px solid var(--lt-line);
  border-radius: 8px;
  padding: 8px;
  background: #fff;
  color: var(--lt-ink);
}

.lt-inline {
  margin-top: 6px;
  font-size: 0.88rem;
}

.lt-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.lt-actions button {
  border: none;
  border-radius: 8px;
  padding: 10px 12px;
  font-weight: 700;
  cursor: pointer;
}

#generateBtn {
  background: linear-gradient(120deg, var(--lt-accent), var(--lt-accent-2));
  color: #fff;
}

.lt-secondary {
  background: #e5edf7;
  color: #334155;
}

.lt-runtime {
  margin: 10px 0 0;
  font-size: 0.86rem;
  color: #334155;
}

.lt-viz {
  border: 1px solid var(--lt-line);
  border-radius: 10px;
  background: linear-gradient(180deg, #f0f9ff 0%, #eaf4ff 100%);
  padding: 10px;
}

#wellsCanvas {
  width: 100%;
  display: block;
  border-radius: 8px;
}

.lt-output h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

#ideaList {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

#ideaList li {
  line-height: 1.45;
}

.lt-formula {
  margin-top: 10px;
  background: #ecfeff;
  color: #0f172a;
  border: 1px dashed #67e8f9;
  border-radius: 8px;
  padding: 10px;
  font-weight: 600;
}

.lt-tech-grid,
.lt-case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lt-tech-grid article,
.lt-case-grid article {
  border: 1px solid var(--lt-line);
  border-radius: 10px;
  padding: 10px;
  background: #fbfdff;
}

.lt-tech-grid h3,
.lt-case-grid h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.lt-footer {
  max-width: 1100px;
  margin: 14px auto 4px;
  text-align: center;
  color: #475569;
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .lt-grid {
    grid-template-columns: 1fr;
  }

  .lt-tech-grid,
  .lt-case-grid {
    grid-template-columns: 1fr;
  }
}