body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            margin: 0;
            padding: 0;
            background: linear-gradient(135deg, #1a1f35 0%, #2a2f66 100%);
            color: white;
            font-size: 16px;
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .container {
            max-width: 1200px;
            width: 100%;
            margin: 2rem auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .logo-container {
            display: flex;
            justify-content: flex-start;
            margin-bottom: 1rem;
        }

        .navbar {
            width: 240px;
            min-height: 70vh;
            margin: 0;
            padding: 1.5rem;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            background-color: rgba(26, 31, 53, 0.8);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            border-radius: 12px;
            position: sticky;
            top: 2rem;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 600;
            color: #7dd3fc;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            width: 300px;
            white-space: nowrap;
        }

        .logo svg {
            width: 32px;
            height: 32px;
            fill: #7dd3fc;
        }

        .hero {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 80vh;
            position: relative;
            background: transparent;
            flex-direction: column;
            padding: 1rem;
        }

        .hero-content {
            text-align: center;
            max-width: 100%;
            margin: 0 auto;
            padding: 1rem;
            z-index: 1;
        }

        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            font-weight: 800;
        }

        .highlight {
            background-color: rgba(125, 211, 252, 0.2);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            color: #7dd3fc;
        }

        .hero p {
            color: #94a3b8;
            margin-bottom: 2rem;
            font-size: 1rem;
            line-height: 1.7;
        }

        .cta-button {
            background-color: #7dd3fc;
            color: #1a1f35;
            padding: 0.8rem 1.5rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1rem;
            transition: all 0.2s ease;
        }

        .cta-button:hover {
            background-color: #93dcfd;
            transform: translateY(-2px);
        }

        .decorative-elements {
            position: absolute;
            width: 100%;
            height: 100%;
            overflow: hidden;
        }

        .course-card {
            background: white;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .course-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 6px 24px rgba(0,0,0,0.15);
        }

        .course-card h3 {
            font-size: 1.25rem;
            margin: 0 0 1rem 0;
            color: #1a1f35;
        }

        .course-card p {
            font-size: 1rem;
            color: #666;
            line-height: 1.6;
        }

        .dashboard-layout {
            display: flex;
            flex-direction: row;
            width: 100%;
            align-items: flex-start;
            justify-content: center;
            gap: 2rem;
            max-width: 1400px;
            margin: 0 auto;
        }

        .course-nav, .sidebar {
            display: none;
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 1rem;
            color: white;
            letter-spacing: -0.5px;
            text-align: center;
        }

        .main-content {
            flex: 1;
            max-width: 900px;
            padding: 1.5rem;
            background-color: rgba(26, 31, 53, 0.4);
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.05);
            margin: 0 auto;
        }

        .module-card {
            background: rgba(255, 255, 255, 0.08);
            padding: 2rem;
            border-radius: 16px;
            margin-bottom: 2rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all 0.3s ease;
            position: relative;
            overflow: visible;
            width: 100%;
            max-width: 800px;
            box-sizing: border-box;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
            margin-left: auto;
            margin-right: auto;
        }

        .module-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
            border-color: rgba(125, 211, 252, 0.3);
        }

        .module-card.completed {
            background: rgba(34, 197, 94, 0.05);
            border-color: rgba(34, 197, 94, 0.2);
        }

        .module-card.completed .task-content {
            text-decoration: line-through;
            opacity: 0.7;
        }

        .module-card h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 0 0 1.5rem;
            color: #7dd3fc;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            letter-spacing: -0.02em;
        }

        .module-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 1.5rem 0 0.5rem;
            color: #e2e8f0;
        }

        .card-number {
            position: absolute;
            top: -12px;
            left: -12px;
            background: #1a1f35;
            color: #7dd3fc;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 8px;
            border: 2px solid #7dd3fc;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .task-checkbox {
            position: absolute;
            bottom: 1.75rem;
            right: 1.75rem;
            appearance: none;
            width: 24px;
            height: 24px;
            border: 2px solid rgba(125, 211, 252, 0.5);
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .task-checkbox:checked {
            background-color: #22c55e;
            border-color: #22c55e;
        }

        .task-checkbox:checked::before {
            content: "✓";
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-size: 16px;
        }

        .task-checkbox:hover {
            border-color: #7dd3fc;
        }

        .task-content {
            color: #e2e8f0;
            font-size: 1rem;
            line-height: 1.6;
            transition: all 0.2s ease;
            gap: 1rem;
        }

        .task-content p {
            margin: 0.5rem 0 1rem;
            color: #cbd5e1;
        }

        .task-content ul, .task-content ol {
            padding-left: 1.5rem;
            margin: 0.75rem 0;
        }

        .task-content ul {
            list-style-type: none;
        }

        .task-content ul li {
            position: relative;
            padding-left: 1.5rem;
            margin-bottom: 0.75rem;
        }

        .task-content ul li::before {
            content: "•";
            color: #7dd3fc;
            font-size: 1.2rem;
            position: absolute;
            left: 0;
            top: -0.1rem;
        }

        .task-content ol li {
            margin-bottom: 0.75rem;
            padding-left: 0.5rem;
        }

        .task-content ul ul, .task-content ol ol, .task-content ul ol, .task-content ol ul {
            margin: 0.5rem 0 0.5rem 0.5rem;
        }

        .task-content ul ul li::before {
            content: "◦";
            color: #94a3b8;
        }

        .task-content a {
            color: #7dd3fc;
            text-decoration: none;
            transition: all 0.2s ease;
            border-bottom: 1px dotted rgba(125, 211, 252, 0.4);
            padding-bottom: 1px;
        }

        .task-content a:hover {
            color: #93dcfd;
            border-bottom: 1px solid rgba(125, 211, 252, 0.8);
        }

        .task-content code {
            background: rgba(0, 0, 0, 0.2);
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-family: monospace;
            font-size: 0.9rem;
            color: #7dd3fc;
        }

        @media (max-width: 1024px) {
            .dashboard-layout {
                flex-direction: column;
                align-items: center;
                gap: 1.5rem;
            }
            .navbar {
                width: 100%;
                min-height: unset;
                margin-right: 0;
                margin-bottom: 1rem;
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
                padding: 1rem;
            }
            .navbar-sections {
                display: flex;
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
                gap: 0.5rem;
            }
            .navbar-sections li {
                width: auto;
                text-align: center;
                margin-bottom: 0;
                padding: 0.75rem 1rem;
                flex: 1 1 auto;
                min-width: 120px;
            }
            .main-content {
                width: 100%;
                max-width: 100%;
                padding: 1rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                max-width: 95%;
                padding: 1rem;
            }

            .navbar {
                flex-direction: column;
                align-items: flex-start;
                padding: 0.5rem;
            }

            .navbar-sections {
                flex-direction: column;
                width: 100%;
            }

            .navbar-sections li {
                width: 100%;
                text-align: left;
                padding: 0.5rem 0;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .hero p {
                font-size: 0.9rem;
            }

            .cta-button {
                font-size: 0.9rem;
                padding: 0.6rem 1.2rem;
            }

            .module-card {
                width: 90%;
                margin: 1rem auto;
            }

            .task-content ul {
                flex-direction: column;
            }

            .task-content table {
                display: block;
                width: 100%;
                overflow-x: auto;
            }

            .task-content td {
                display: block;
                width: 100%;
                padding: 0.5rem 0;
            }
        }

        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }

            .hero p {
                font-size: 0.8rem;
            }

            .cta-button {
                font-size: 0.8rem;
                padding: 0.5rem 1rem;
            }

            .navbar-sections li {
                padding: 0.4rem 0;
            }
        }

        .sidebar {
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            position: sticky;
            top: 2rem;
            height: calc(100vh - 4rem);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            overflow-y: auto;
        }

        .date-item {
            padding: 0.5rem;
            margin-bottom: 0.25rem;
            border-radius: 8px;
            color: #94a3b8;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .date-item strong {
            display: block;
            margin-bottom: 0.25rem;
        }

        .date-item p {
            margin: 0.25rem 0;
        }

        .sidebar h3 {
            margin: 0.75rem 0 0.5rem 0;
        }

        .task-content .rsvp-button,
        .rsvp-button {
            display: inline-block;
            background-color: #3b718b;
            color: white !important;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 500;
            margin-top: 0.5rem;
            transition: all 0.2s ease;
        }

        .task-content .rsvp-button:hover,
        .rsvp-button:hover {
            background-color: #3a667b;
            transform: translateY(-2px);
            color: white !important;
        }

        .task-content a.rsvp-button {
            color: white !important;
        }

        .section-header {
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            flex-grow: 1;
            text-align: center;
        }

        .navbar-spacer {
            display: none;
        }

        .navbar-sections {
            list-style: none;
            padding: 0;
            margin: 0;
            width: 100%;
        }

        .navbar-sections li {
            padding: 0.85rem 1rem;
            margin-bottom: 0.75rem;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.2s ease;
            color: #e2e8f0;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-sections li:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateX(2px);
        }

        .navbar-sections li.active {
            background-color: rgba(125, 211, 252, 0.2);
            color: #7dd3fc;
            font-weight: 600;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .section-label {
            position: absolute;
            top: 12px;
            right: 12px;
            background: #e2e8f0;
            color: #1a1f35;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .task-content table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
        }

        .task-content td {
            padding: 0.5rem;
            vertical-align: top;
        }

        .task-content td:not(:last-child) {
            border-right: 1px solid rgba(255, 255, 255, 0.1);
            padding-right: 1.5rem;
            margin-right: 1.5rem;
        }

        .rsvp-button {
            display: inline-block;
            margin-top: 0.5rem;
        }

        .main-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: white;
            border-bottom: 2px solid rgba(125, 211, 252, 0.3);
            padding-bottom: 0.75rem;
        }

        .main-content h4 {
            font-size: 1.1rem;
            font-weight: 500;
            color: #94a3b8;
            margin-top: 0;
            margin-bottom: 2rem;
        }

        .banner {
            width: 100%;
            background-color: #1a1f35;
            color: white;
            padding: 0.75rem 1.5rem;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .banner-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown select {
            appearance: none;
            background-color: rgba(125, 211, 252, 0.15);
            border: 1px solid rgba(125, 211, 252, 0.3);
            border-radius: 8px;
            color: #7dd3fc;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.6rem 2.5rem 0.6rem 1rem;
            transition: all 0.2s ease;
            width: auto;
            min-width: 200px;
        }

        .nav-dropdown select:hover {
            background-color: rgba(125, 211, 252, 0.25);
            border-color: rgba(125, 211, 252, 0.5);
        }

        .nav-dropdown select:focus {
            outline: none;
            box-shadow: 0 0 0 2px rgba(125, 211, 252, 0.4);
        }

        .nav-dropdown::after {
            content: "▼";
            color: #7dd3fc;
            font-size: 0.7rem;
            position: absolute;
            right: 1rem;
            top: 50%;
            transform: translateY(-50%);
            pointer-events: none;
        }

        @media (max-width: 768px) {
            .banner-content {
                flex-direction: column;
                gap: 0.75rem;
            }
            
            .nav-dropdown select {
                width: 100%;
                min-width: 250px;
            }
        }

        .header {
            width: 100%;
            display: flex;
            justify-content: flex-start;
            align-items: center;
            margin-bottom: 2rem;
            padding: 1rem 0;
        }