:root {

  /* Base & Surfaces */
  --color-bg:         #ffffff;
  --color-surface:    #f7f9fa;

  /* Text & Primary */
  --color-primary:    #2e3a59;
  --color-text:       #343a40;

  /* Accent */
  --color-accent:     #4a90e2;
  --color-accent-light: #d0e6fc;
	--color-accent-lighter: #e0f2fd;

  /* New complementary accent */
  --color-accent-alt: #2ecc71;

  /* Muted */
  --color-muted-text: #6c757d;
	
	--color-ta: #eceff1;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: var(--font-sans);

  /* Spacing */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;

  /* Border radius */
  --radius: 0.5rem;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
}


/* Links and buttons */
a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}





/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-md);
  background-color: var(--color-surface);
  color: #7f8c8d;
  font-size: 0.875rem;
}



.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
}

.cards-container {
    display: flex;
		flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
		justify-content: center; /* optional: center cards*/
}



.instructor-card, .ta-card {
	text-align: center;
  /* make each card at least 250px and allow growth */
  flex: 0 0 150px;               /* ← flex-grow:1, flex-shrink:1, flex-basis:250px */
  width: 150px;              /* optional: cap the width */
  box-sizing: border-box;        /* ensure padding is counted in width */
}



.card img {
    max-width: 100%;
    border-radius: var(--radius);
}



table {
    width: 100%;
}

h1 {
    margin: var(--spacing-md);
    font-family: var(--font-heading);
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: var(--spacing-md);
		margin-top: var(--spacing-md);
    text-align: left;
    flex: 1;
	background-color: var(--color-surface); 
	margin-top: 20px; 
	padding: 5px 20px 20px;
	-webkit-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	-moz-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	-o-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	-ms-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
}

main .card:first-of-type {
  margin-top: 0;
}

.instructor-card, .ta-card {
  background: var(--color-ta);
  border-radius: var(--radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
  padding: var(--spacing-md);
  text-align: center;
  flex: 0 0 150px;
  width: 150px;
  box-sizing: border-box;
  transition: transform 0.2s ease;
	
	-webkit-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	-moz-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	-o-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	-ms-box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
	box-shadow:0 2px 5px 0 rgba(0,0,0,0.1);
}

.instructor-card:hover, .ta-card:hover {
  transform: translateY(-3px);
}





@media (max-width: 768px) {
  .ta-card,
  .instructor-card {
    flex: 1 1 80%;
    max-width: 45%;
    font-size: 1rem;
    margin: var(--spacing-sm) auto;
  }
	
  main h1 {
    font-size: 1.5rem;
    line-height: 1.3;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
  }
	
  main h2 {
    font-size: 1.25rem;
  }

  main h3 {
    font-size: 1.1rem;
  }
}