:root {
			--chalkboard: #2d3436;
			--chalkboard-light: #3d4446;
			--chalk: #f5f0e6;
			--chalk-dim: #c4bfb3;
			--wood: #8b5a2b;
			--wood-light: #a67c52;
			--gold: #d4a84b;
			--gold-light: #e8c87a;
			--accent-green: #6b9b6b;
		}

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

		body {
			font-family: 'Source Sans Pro', sans-serif;
			background-color: var(--chalkboard);
			color: var(--chalk);
			line-height: 1.7;
		}

		h1, h2, h3 {
			font-family: 'Libre Baskerville', Georgia, serif;
			font-weight: 400;
		}

		.banner {
			background-image: url("graphics/Blackboard.jpg");
   			background-repeat: no-repeat;
   			background-size: 100%;
  text-align: center;
   			     width: 100%;
       			     height: width*0.15;
			font-family: 'Libre Baskerville', Georgia, serif;
			font-weight: 600;
			font-size: calc(min(7.5vw,70px));
			color: #fae1b4;
			border-style: solid;
			border-color: #644117;
   		}

		.faq-section {
			background: linear-gradient(135deg, var(--chalkboard-light) 0%, var(--chalkboard) 100%);
			border-radius: 8px;
			padding: 2rem;
			margin-top: 1rem;
		}

		.faq-section h3 {
			color: var(--gold-light);
			margin-bottom: 1rem;
			font-size: 1.3rem;
		}

		.faq-section .question {
			color: var(--gold);
			margin-bottom: 0.1rem;
			font-size: 1.3rem;
			font-weight: 400;
		}

		.faq-section .answer {
			margin-bottom: 1rem;
			font-size: 1.1rem;
		}


		.container {
			max-width: 1000px;
			margin: 0 auto;
			padding: 0 1.5rem;
		}

		/* Header */
		header {
			background: linear-gradient(180deg, var(--wood) 0%, var(--wood-light) 100%);
			padding: 0.75rem 0;
			box-shadow: 0 4px 12px rgba(0,0,0,0.4);
		}

		nav {
			display: flex;
			justify-content: center;
			gap: 2rem;
			flex-wrap: wrap;
		}

		nav a {
			color: var(--chalk);
			text-decoration: none;
			font-size: 0.95rem;
			padding: 0.5rem 0;
			border-bottom: 2px solid transparent;
			transition: border-color 0.2s;
		}

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

		/* Hero */
		.hero {
			text-align: center;
			padding: 3rem 0 2rem;
		}
		
		.hero-image {
			max-width: 100%;
			height: auto;
			border-radius: 8px;
			box-shadow: 0 8px 32px rgba(0,0,0,0.5);
			margin-bottom: 0.5rem;
		}

		.image-credit {
			font-size: 0.8rem;
			color: var(--chalk-dim);
			font-style: italic;
			margin-bottom: 1.5rem;
		}

		.hero h1 {
			font-size: clamp(1.75rem, 5vw, 2.5rem);
			margin-bottom: 1rem;
			color: var(--chalk);
		}

		.hero .tagline {
			padding-top: 1.5rem;
			font-size: 1.3rem;
			color: var(--chalk-dim);
			max-width: 700px;
			margin: 0 auto;
		}

		/* Sections */
		section {
			padding: 3rem 0;
			border-top: 1px solid var(--chalkboard-light);
		}

		section h2 {
			font-size: clamp(1.4rem, 4vw, 1.8rem);
			margin-bottom: 1.5rem;
			color: var(--gold);
		}

		section p {
			margin-bottom: 1rem;
			color: var(--chalk-dim);
		}

		section p:last-child {
			margin-bottom: 0;
		}

		section a {
			color: var(--gold-light);
			text-decoration: none;
		}

		section a:hover {
			text-decoration: underline;
		}

		/* Cards */
		.card-grid {
			display: grid;
			grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
			gap: 1.5rem;
			margin-top: 1.5rem;
		}

		.card {
			background: var(--chalkboard-light);
			border-radius: 8px;
			padding: 1.5rem;
			border: 1px solid rgba(255,255,255,0.1);
			transition: transform 0.2s, box-shadow 0.2s;
			position:relative;
		}

		.card:hover {
			transform: translateY(-4px);
			box-shadow: 0 8px 24px rgba(0,0,0,0.3);
		}

		.card h3 {
			color: var(--chalk);
			margin-bottom: 0.75rem;
			font-size: 1.2rem;
		}

		.card p {
			font-size: 0.95rem;
			padding-bottom: 2.5rem;
		}

		.card .placeholder {
			display: inline-block;
			margin-top: 1rem;
			padding: 0.5rem 1rem;
			background: var(--wood);
			color: var(--chalk);
			border-radius: 4px;
			font-size: 0.85rem;
			text-decoration: none;
			transition: background 0.2s;
			position:absolute;
            bottom: 1.5rem; left: 1.5rem;
        }

		.card .placeholder:hover {
			background: var(--wood-light);
		}

		/* Euler Section */
		.euler-section {
			background: linear-gradient(135deg, var(--chalkboard-light) 0%, var(--chalkboard) 100%);
			border-radius: 8px;
			padding: 2rem;
			margin-top: 1rem;
			border-left: 4px solid var(--gold);
		}

		.euler-section h3 {
			color: var(--gold-light);
			margin-bottom: 1rem;
			font-size: 1.3rem;
		}

		.math-block {
			font-family: 'Libre Baskerville', Georgia, serif;
			font-style: italic;
			text-align: center;
			padding: 1rem;
			margin: 1rem 0;
			color: var(--chalk);
			font-size: 1.1rem;
		}

		/* Author List */
		.authors {
			columns: 2;
			column-gap: 2rem;
			margin-top: 1rem;
		}

		.authors p {
			break-inside: avoid;
			margin-bottom: 0.5rem;
			font-size: 0.95rem;
		}

		.authors .name {
			color: var(--chalk);
			font-weight: 600;
		}

		.authors .affiliation {
			color: var(--chalk-dim);
			font-style: italic;
		}

		/* Footer */
		footer {
			background: var(--wood);
			padding: 2rem 0;
			margin-top: 3rem;
			text-align: center;
		}

		footer p {
			color: var(--chalk-dim);
			font-size: 0.9rem;
		}

		footer a {
			color: var(--gold-light);
			text-decoration: none;
		}

		footer a:hover {
			text-decoration: underline;
		}

		/* Responsive */
		@media (max-width: 600px) {
			nav {
				gap: 1rem;
			}

			nav a {
				font-size: 0.85rem;
			}

			.hero {
				padding: 2rem 0 1.5rem;
			}

			section {
				padding: 2rem 0;
			}

			.euler-section {
				padding: 1.5rem;
			}

			.authors {
				columns: 1;
			}

			.card {
				padding: 1.25rem;
			}
		}