/* ======================================================
   UNDERSTANDING BORNEO: FLORA
   Shared Stylesheet — v1.1
   Museum-grade educational design
   ====================================================== */

/* ---------- Base Reset ---------- */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Noto Serif TC", "Noto Serif", "Georgia", serif;
  line-height: 1.75;
  color: #2b2b2b;
  background-color: #f7f5f0;
}

/* ---------- Page Width ---------- */

body > * {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ---------- Headings ---------- */

h1 {
  font-size: 2.2rem;
  margin-top: 2.5rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

h2 {
  font-size: 1.6rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

/* ---------- Subtitles ---------- */

header p strong {
  font-size: 1.05rem;
  font-weight: 500;
  color: #4a4a4a;
}

/* ---------- Paragraphs ---------- */

p {
  margin-top: 0;
  margin-bottom: 1.2rem;
}

/* ---------- Lists ---------- */

ul {
  margin-left: 1.2rem;
  margin-bottom: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* ---------- Horizontal Rules ---------- */

hr {
  border: none;
  border-top: 1px solid #d6d2c8;
  margin: 2.5rem 0;
}

/* ---------- Figures & Images ---------- */

figure {
  margin: 2rem 0;
}

figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid #d6d2c8;
  background-color: #ffffff;
}

figcaption {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: #4f4f4f;
}

/* ---------- Concept Callout Box ---------- */

section div {
  background-color: #efede6;
  border-left: 4px solid #8a8f6a;
  padding: 1rem 1.2rem;
}

/* ---------- Observation Lists ---------- */

section ul {
  list-style-type: disc;
}

/* ---------- Navigation Links ---------- */

a {
  color: #3f5f3f;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ---------- Footer ---------- */

footer {
  margin-top: 3rem;
  padding-top: 2rem;
  padding-bottom: 2rem;
  font-size: 0.9rem;
  color: #5a5a5a;
  text-align: center;
}

/* ---------- Responsive Adjustments ---------- */

@media (max-width: 600px) {

  body > * {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  h3 {
    font-size: 1.15rem;
  }

}