/* ====== GLOBAL STYLES ====== */
:root {
  --main-green: #3e8e41; /* primary green */
  --light-beige: #f9f6ee; /* background beige */
  --hover-green: #2d6a2e; /* darker hover green */
  --text-dark: #2f2f2f;
  --link-green: #3e8e41;
  --border-light: #dcd7c9;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--light-beige);
  color: var(--text-dark);
  line-height: 1.6;
  margin: 0;
  text-align: center;
  padding: 2rem;                /* base padding; adjusted in media queries */
}

/* ====== HEADER ====== */
header {
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 1rem;
}

h1 {
  color: var(--main-green);
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

/* ====== NAVIGATION ====== */
nav ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--link-green);
  text-decoration: none;
  font-weight: 600;
  position: relative;
  transition: color 0.3s ease;
}

/* animated underline hover effect */
nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--hover-green);
  transition: width 0.3s ease;
}

nav a:hover::after,
nav a:focus::after {
  width: 100%;
}

nav a:hover,
nav a:focus {
  color: var(--hover-green);
}

/* ====== MAIN CONTENT ====== */
/* Foundational Three: width %, max-width, centered with margin: 0 auto */
main {
  margin: 2rem auto;            /* centers the block vertically with space */
  text-align: center;
  width: 90%;                   /* % width for fluid layout */
  max-width: 1200px;            /* keeps lines readable on large screens */
}

h2 {
  color: var(--main-green);
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
  font-size: 1rem;
}

/* ====== FOOTER ====== */
footer {
  border-top: 2px solid var(--border-light);
  margin-top: 2rem;
  padding-top: 1rem;
  font-size: 0.9rem;
}

/* enhanced responsive footer nav */
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  text-align: center;
}

.footer-nav a {
  color: var(--link-green);
  text-decoration: none;
  font-weight: 600;
  position: relative;
  transition: color 0.3s ease;
}

.footer-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--hover-green);
  transition: width 0.3s ease;
}

.footer-nav a:hover::after,
.footer-nav a:focus::after {
  width: 100%;
}

.footer-nav a:hover,
.footer-nav a:focus {
  color: var(--hover-green);
}

.footer-nav .sep {
  color: var(--border-light);
  margin: 0 0.25rem;
}

/* ====== GLOBAL LINK COLORS (override blue/purple/red) ====== */
a {
  color: var(--link-green);
  text-decoration: none;
  font-weight: 600;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

a:visited {
  color: var(--hover-green);
}

a:hover,
a:focus {
  color: var(--hover-green);
  text-decoration: underline;
}

a:active {
  color: #1f4d20;
}

/* ====== ACCESSIBILITY ====== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--main-green);
  color: #fff;
  padding: 8px 16px;
  z-index: 100;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 0;
}

/* Clear focus style for keyboard users */
a:focus-visible {
  outline: 3px solid var(--hover-green);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none; transition: none; }
}

/* ====== MEDIA / FIGURES ====== */
img {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}

figure img { max-width: 600px; }

figure {
  margin: 1rem auto 2rem;
  text-align: center;
}

figcaption {
  margin-top: 0.5rem;
  font-style: italic;
  color: #555;
}

/* ====== BIO LIST ====== */
.bio-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 60ch;     /* comfy reading width */
  text-align: left;    /* keeps paragraphs readable */
}

.bio-list > li + li { margin-top: 1rem; }
.bio-list li strong + br { line-height: 1rem; }

/* ===================================================================== */
/* ========================= RESPONSIVE QUERIES ========================= */
/* Desktop/Large screens = default rules above                            */
/* Tablet: 601px–980px                                                    */
/* Mobile: 370px–600px                                                    */
/* (You can adjust breakpoints to your instructor's preference)           */
/* ===================================================================== */

/* ====== TABLET (601px–980px) ====== */
@media screen and (min-width: 601px) and (max-width: 980px) {
  body { padding: 1.5rem; }
  main { width: 94%; max-width: 1000px; }
  nav ul { gap: 1rem; }
  .h1-responsive { font-size: 1.6rem; }
  .h2-responsive { font-size: 1.2rem; }
}

/* ====== MOBILE (370px–600px) ====== */
@media screen and (min-width: 370px) and (max-width: 600px) {
  body { padding: 1rem; }
  main { width: 95%; max-width: 580px; }
  nav ul { gap: 0.65rem; }
  .h1-responsive { font-size: 1.4rem; }
  .h2-responsive { font-size: 1.1rem; }
  .footer-nav { flex-direction: column; gap: 0.25rem; }
  .footer-nav .sep { display: none; }
}

/* ====== SMALL-LAPTOP / WIDE-TABLET (981px–1400px) ====== */
@media screen and (min-width: 981px) and (max-width: 1400px) {
  main { width: 92%; max-width: 1100px; }
  nav ul { gap: 1.25rem; }
}