:root {
  --paper: #f4eee4;
  --paper-2: #efe4d4;
  --card: #fffaf3;
  --ink: #241c16;
  --ink-soft: #4a4036;
  --rust: #8d4332;
  --rust-deep: #6e3124;
  --olive: #3d5246;
  --line: #d9c7b0;
  --metal: #6e655c;
  --focus: #1f4d3a;
  --shadow: 0 18px 40px rgba(60, 40, 24, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 420px at 50% -80px, rgba(141, 67, 50, 0.08), transparent 60%),
    linear-gradient(180deg, var(--paper) 0%, #f7f2ea 100%);
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
}

a { color: var(--rust-deep); }

a:hover { color: var(--ink); }

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: white;
  padding: 0.5rem 0.8rem;
  z-index: 5;
}

.skip:focus { top: 0.6rem; }

.banner {
  background: var(--olive);
  color: #f6f1e8;
  text-align: center;
  padding: 0.55rem 1rem;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.wrap {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
}

header.top {
  padding: 1.4rem 0 0.4rem;
}

.brand {
  display: flex;
  gap: 0.9rem;
  align-items: center;
}

.mark {
  width: 54px;
  height: 54px;
  flex: none;
}

h1, h2, .word {
  font-family: Fraunces, Georgia, serif;
  font-weight: 560;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.word {
  margin: 0;
  font-size: 1.7rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

nav a {
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  font-weight: 600;
}

nav a:hover { border-bottom-color: var(--rust); color: var(--ink); }

main { padding-bottom: 3rem; }

section {
  margin-top: 1.25rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 1.35rem 1.35rem 1.5rem;
}

.home {
  background:
    linear-gradient(180deg, rgba(255,250,243,0.92), rgba(255,250,243,0.96)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 46px,
      rgba(141, 67, 50, 0.05) 46px,
      rgba(141, 67, 50, 0.05) 47px
    );
}

h1 {
  margin: 0.2rem 0 0.8rem;
  font-size: clamp(2.2rem, 6vw, 3.3rem);
}

h2 {
  margin: 0 0 0.6rem;
  font-size: 1.85rem;
}

.lede, p { margin: 0 0 0.85rem; }

.lede { font-size: 1.22rem; }

ul.plain {
  margin: 0 0 0.9rem;
  padding-left: 1.2rem;
}

ul.plain li { margin: 0.25rem 0; }

.note-label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--olive);
  margin-bottom: 0.35rem;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 1rem 0 0;
  padding: 0.9rem 1rem 1rem;
  background: #fffdf9;
}

legend {
  font-family: Fraunces, Georgia, serif;
  font-size: 1.2rem;
  padding: 0 0.3rem;
}

label {
  display: block;
  font-weight: 700;
  margin: 0.85rem 0 0.3rem;
}

.help {
  display: block;
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.98rem;
  margin-top: 0.15rem;
}

input, textarea, select {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: white;
  border: 1px solid #cbb89f;
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
}

textarea { min-height: 6.5rem; resize: vertical; }

input:focus, textarea:focus, select:focus {
  outline: 3px solid rgba(31, 77, 58, 0.28);
  border-color: var(--focus);
}

button {
  margin-top: 1rem;
  font: inherit;
  font-weight: 700;
  color: #fffaf3;
  background: var(--rust);
  border: 0;
  border-radius: 999px;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
}

button:hover { background: var(--rust-deep); }

button:focus { outline: 3px solid rgba(31, 77, 58, 0.35); outline-offset: 2px; }

.result {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  background: #f3e4c8;
  border: 1px solid #c9a36a;
  color: var(--ink);
  font-weight: 650;
}

.example {
  border-left: 4px solid var(--olive);
  padding-left: 0.9rem;
}

footer {
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto 2.5rem;
  color: var(--ink-soft);
  font-size: 1rem;
}

footer strong { color: var(--ink); }

@media (max-width: 640px) {
  body { font-size: 1.05rem; }
  section { padding: 1.1rem; }
}