:root {
  --bg-a: #f7f4e9;
  --bg-b: #e7eef4;
  --ink: #1f2933;
  --muted: #506172;
  --panel: #ffffff;
  --edge: #c6d3de;
  --brand: #0f766e;
  --brand-strong: #115e59;
  --accent: #e9b949;
  --warn-bg: #fff2df;
  --warn-ink: #8f3d00;
  --shadow: 0 10px 30px rgba(31, 41, 51, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, rgba(15, 118, 110, 0.12), transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(233, 185, 73, 0.16), transparent 40%),
    linear-gradient(135deg, var(--bg-a), var(--bg-b));
  font-family: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
}

.page {
  width: min(1200px, 92vw);
  margin: 2rem auto 3rem;
}

.hero {
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(198, 211, 222, 0.9);
  border-radius: 1rem;
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.hero h1 {
  margin: 0.3rem 0 0.7rem;
  font-family: "Sora", "Trebuchet MS", sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 80ch;
}

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

.panel {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 1rem;
  padding: 0.85rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 15rem;
}

.panel label {
  font-weight: 700;
  margin-bottom: 0.55rem;
}

textarea {
  width: 100%;
  min-height: 14rem;
  border: 1px solid var(--edge);
  border-radius: 0.7rem;
  background: #fefefe;
  color: var(--ink);
  padding: 0.8rem;
  resize: vertical;
  font: 0.9rem/1.45 "IBM Plex Mono", "Menlo", "Consolas", monospace;
}

textarea:focus {
  outline: 2px solid rgba(15, 118, 110, 0.35);
  border-color: var(--brand);
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

button {
  border: 0;
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  padding: 0.6rem 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

button.secondary {
  background: #1d4f91;
}

button.tertiary {
  background: #6b7280;
}

.output-panel {
  grid-column: 1 / -1;
}

.output-panel textarea {
  min-height: 20rem;
}

.warnings {
  grid-column: 1 / -1;
  background: var(--warn-bg);
  color: var(--warn-ink);
  border: 1px solid #ffd59f;
  border-radius: 1rem;
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow);
}

.warnings p {
  margin: 0;
}

.warnings ul {
  margin: 0;
  padding-left: 1.2rem;
}

.warnings li+li {
  margin-top: 0.35rem;
}

@media (max-width: 860px) {
  .page {
    width: 94vw;
    margin: 1rem auto 2rem;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  textarea {
    min-height: 12.5rem;
  }

  .output-panel textarea {
    min-height: 16rem;
  }
}