:root {
            --color-bronze: #866e49;
            --color-sage: #8f8f8a;
            --color-navy: #00175c;
            --color-plum: #68567d;
            --color-silver: #a7a8a7;
        }

        .main-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
            background-color: var(--color-navy);
            color: white;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-sizing: border-box;
        }

        .brand-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--color-bronze);
        }

        .main-nav ul {
            display: flex;
            list-style-type: none;
            margin: 0;
            padding: 0;
        }

        .main-nav li {
            margin: 0 1.5rem;
        }

        .main-nav a {
            color: white;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .main-nav a:hover {
            color: var(--color-bronze);
        }

        .menu-toggle {
            display: none;
            font-size: 2rem;
            cursor: pointer;
            color: var(--color-bronze);
        }

        .mobile-navigation {
            visibility: hidden;
            opacity: 0;
            transform: translateY(-20px);
            transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
            background-color: var(--color-plum);
            color: white;
            padding: 2rem;
            position: absolute;
            top: 100%;
            right: 0;
            width: 300px;
            z-index: 999;
        }

        .mobile-navigation.active {
            visibility: visible;
            opacity: 1;
            transform: translateY(0);
        }

        .mobile-nav-list {
            list-style-type: none;
            margin: 0;
            padding: 0;
        }

        .mobile-nav-list li {
            margin: 1rem 0;
        }

        .mobile-nav-list a {
            color: white;
            text-decoration: none;
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
        }

        .geometric-bg {
            background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-plum) 100%);
            position: relative;
            overflow: hidden;
        }

        .geometric-bg::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                polygon(0 0, 100% 0, 85% 100%, 0% 100%),
                polygon(15% 0, 100% 0, 100% 85%, 30% 100%);
            background-size: 50% 100%, 50% 100%;
            background-position: left, right;
            background-repeat: no-repeat;
            opacity: 0.1;
        }

        .decorative-lines {
            position: absolute;
            width: 200px;
            height: 2px;
            background: var(--color-bronze);
            transform: rotate(-45deg);
        }

        .floating-shapes {
            position: absolute;
            width: 60px;
            height: 60px;
            border: 3px solid var(--color-bronze);
            border-radius: 50%;
            opacity: 0.3;
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }

        .text-bronze { color: var(--color-bronze); }
        .text-sage { color: var(--color-sage); }
        .text-navy { color: var(--color-navy); }
        .text-plum { color: var(--color-plum); }
        .text-silver { color: var(--color-silver); }

        .bg-bronze { background-color: var(--color-bronze); }
        .bg-sage { background-color: var(--color-sage); }
        .bg-navy { background-color: var(--color-navy); }
        .bg-plum { background-color: var(--color-plum); }
        .bg-silver { background-color: var(--color-silver); }

        .border-bronze { border-color: var(--color-bronze); }
        .border-sage { border-color: var(--color-sage); }
        .border-navy { border-color: var(--color-navy); }
        .border-plum { border-color: var(--color-plum); }

        body {
            padding-top: 80px;
        }

        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-bronze), transparent);
            margin: 4rem 0;
        }

        .course-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }

        .course-item {
            padding: 2rem;
            border: 2px solid var(--color-sage);
            position: relative;
            transition: transform 0.3s ease;
        }

        .course-item:hover {
            transform: translateY(-5px);
        }

        .course-item::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: var(--color-bronze);
            z-index: -1;
            transform: rotate(1deg);
        }

        .timeline {
            position: relative;
            padding: 2rem 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--color-bronze);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            margin: 2rem 0;
            padding: 0 2rem;
        }

        .timeline-item:nth-child(odd) {
            text-align: right;
            padding-right: calc(50% + 2rem);
        }

        .timeline-item:nth-child(even) {
            text-align: left;
            padding-left: calc(50% + 2rem);
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background: var(--color-bronze);
            border-radius: 50%;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .notification-form {
            position: relative;
            background: var(--color-navy);
            color: white;
            padding: 2rem;
            border-radius: 0;
            margin: 2rem 0;
        }

        .notification-form::before {
            content: '';
            position: absolute;
            top: -10px;
            left: 20px;
            width: 0;
            height: 0;
            border-left: 10px solid transparent;
            border-right: 10px solid transparent;
            border-bottom: 10px solid var(--color-navy);
        }

        .zigzag-border {
            position: relative;
        }

        .zigzag-border::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 20px;
            background-image: linear-gradient(45deg, var(--color-bronze) 25%, transparent 25%), 
                              linear-gradient(-45deg, var(--color-bronze) 25%, transparent 25%);
            background-size: 20px 20px;
            background-position: 0 0, 10px 0;
        }