/* css/prof2.css */
/* simple reset */
* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

img,
figure img {
  width: 100%;
}

.portrait {
  max-height: 60vh;
  width: auto;
}

/* =========================
   BASE
========================= */
html,
body {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 20px;
  min-height: 100vh;
  background-color: #EDE9FE; /* Soft Lilac */
  color: #1F2937; /* Dark Slate */
}

body{
  display: grid;
  grid-template-rows: auto 1fr auto;
}

main {
  padding: 0 1.2rem 1.5rem;
}

/* =========================
   LINKS
========================= */
a:link,
a:visited {
  color: #6B4EFF; /* Purple */
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  font-weight: 500;
}

a:hover,
a:focus {
  color: #2DD4BF; /* Teal */
  text-decoration-thickness: 3px;
}

a:focus-visible {
  outline: 3px solid #2DD4BF;
  outline-offset: 3px;
}

/* =========================
   HEADER & NAV
========================= */
header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E7EB;
  position: sticky;
  top: 0;
  z-index: 100;
}

#topnav {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2rem;
}

.logo {
  font-family: "Montserrat", system-ui, sans-serif;
  font-weight: 700;
  color: #6B4EFF;
}

/* Nav links */
.nav-links {
  display: grid;
  grid-auto-flow: column;
  gap: 1.4rem;
  justify-content: end;
}

.nav-links a,
.nav-links img {
  display: inline-block;
  vertical-align: middle;
}

.nav-logo {
  width: 120px;
  height: auto;
  margin-left: 12px;
}

#topnav a {
  color: #1F2937;
  text-decoration: none;
  font-weight: 600;
}

#topnav a:hover,
#topnav a:focus {
  color: #6B4EFF;
}

/* Hamburger button */
#hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: #1F2937;
}

/* =========================
   HEADINGS
========================= */
h1,
h2,
h3,
h4 {
  font-family: "Playfair Display", serif;
}

h1 {
  text-align: center;
  margin-top: 2.5rem;
  color: #6B4EFF;
}

h2 {
  margin: 2.5rem 0 2rem;
}

h3 {
  text-align: center;
  margin: 2.5rem 0 2rem;
  color: #1F2937;
}

h4 {
  font-size: 1.5rem;
  color: #6B4EFF;
  margin: 1rem 0;
}

/* =========================
   SECTIONS
========================= */
section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  padding: 1.2rem;
  background-color: #FFFFFF;
  border-radius: 8px;
  margin-bottom: 2rem;
}

/* =========================
   SPECIAL SECTION
========================= */
#exercices {
  display: block;
  background-color: #6B4EFF;
  color: #FFFFFF;
  border-radius: 8px;
}

#exercices a {
  color: #2DD4BF;
}

#exercices a:hover {
  color: #EDE9FE;
}

/* =========================
   FOOTER
========================= */
footer {
  color: #2DD4BF;
  text-align: center;
  padding: 1.2rem;
  margin-bottom: 2rem;
}

footer a {
  color: #2DD4BF;
}

footer a:hover {
  color: #2DD4BF;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {
  main {
    padding: 0 1rem 1.5rem;
  }

  section {
    grid-template-columns: 1fr;
  }

  #topnav {
    grid-template-columns: 1fr auto auto;
  }

  /* Show hamburger button */
  #hamburger {
    display: block;
  }

  /* Hide nav links by default */
  .nav-links {
    display: none;
    grid-auto-flow: row;
    gap: 1rem;
    width: 100%;
    background-color: #FFFFFF;
    position: absolute;
    top: 70px;
    left: 0;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #E5E7EB;
  }

  /* Show nav when open */
  .nav-links.open {
    display: grid;
  }
}