:root {
  color-scheme: light;
  --bg: #f2efe6;          /* warm desk/paper backdrop */
  --paper: #fffdf8;       /* the sheet */
  --ink: #2b2a26;         /* near-black warm text */
  --muted: #6f6a5e;
  --line: #dbe8f4;        /* faint ruled-notebook blue */
  --accent: #2f5aa8;      /* pen blue */
  --accent-dark: #24488a;
  --border: #cfc7b4;
  --error: #b3261e;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  /* subtle paper grain: faint diagonal linen pattern, no image asset */
  background-image: repeating-linear-gradient(
    45deg,
    rgba(43, 42, 38, 0.025),
    rgba(43, 42, 38, 0.025) 1px,
    transparent 1px,
    transparent 4px
  );
}

main {
  position: relative;
  overflow: hidden;
  width: min(75%, 75rem);
  margin: 0.67rem auto 2rem;
  padding: 2rem 2.25rem;
  background-color: var(--paper);
  background-image: repeating-linear-gradient(
    transparent,
    transparent calc(2rem - 1px),
    var(--line) calc(2rem - 1px),
    var(--line) 2rem
  );
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 12px 32px rgba(43, 42, 38, 0.10);
}

h1 {
  font-size: 1.75rem;
  margin: 0.5rem 0 0;
  text-align: center;
  text-decoration: underline wavy rgba(47, 90, 168, 0.55);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.github-corner {
  position: absolute;
  top: 0;
  right: 0;
  line-height: 0;
}

.github-corner svg {
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.github-corner:hover .octo-arm {
  animation: octocat-wave 560ms ease-in-out;
}

.github-corner:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -4px;
}

@keyframes octocat-wave {
  0%, 100% {
    transform: rotate(0);
  }
  20%, 60% {
    transform: rotate(-25deg);
  }
  40%, 80% {
    transform: rotate(10deg);
  }
}

@media (max-width: 500px) {
  .github-corner:hover .octo-arm {
    animation: none;
  }

  .github-corner .octo-arm {
    animation: octocat-wave 560ms ease-in-out;
  }
}

.tagline {
  color: var(--muted);
  margin: 1rem auto 1.5rem;
  text-align: center;
  max-width: 34rem;
}

form {
  display: grid;
  gap: 1.25rem;
  max-width: 34rem;
  margin-inline: auto;
}

.field {
  display: grid;
  gap: 0.35rem;
  grid-template-columns: minmax(0, 1fr);
}

form label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--ink);
}

form label small {
  font-weight: 400;
  color: var(--muted);
}

input,
select {
  width: 100%;
  min-width: 0;
  padding: 0.55rem 0.7rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 4px;
  font: inherit;
  color: var(--ink);
}

input:focus-visible,
select:focus-visible {
  border-color: var(--accent);
  outline: 2px solid rgba(47, 90, 168, 0.35);
  outline-offset: 1px;
}

#generate {
  width: 100%;
  padding: 0.7rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}

#generate:hover {
  background: var(--accent-dark);
}

#generate:active {
  transform: translateY(1px);
}

#generate:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#status {
  margin-top: 1rem;
  min-height: 1.5em;
  color: var(--muted);
  font-size: 0.9rem;
}

#status.error {
  color: var(--error);
}

@media (max-width: 30em) {
  main {
    margin: 1rem auto;
    width: 100%;
    padding: 1.5rem 1.25rem;
  }

  h1 {
    font-size: 1.5rem;
  }
}