:root {
    --primary-color: #6366f1;
    --secondary-color: #a5b4fc;
    --accent-color: #4f46e5;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #e2e8f0;
    --light-text: #94a3b8;
    --border-color: #334155;
    --section-spacing: 4rem;
    --timeline-color: var(--primary-color);
    --timeline-width: 2px;
    --timeline-dot-size: 16px;
}

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

body {
    font-family: 'Space Mono', monospace;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

main {
    padding: 0;
}

section {
    margin-bottom: var(--section-spacing);
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-weight: 600;
    letter-spacing: 0.5px;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--light-text);
}

p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.75rem;
}

/* Course Card */
.course-card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    height: auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.course-card h2 {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.course-card h3 {
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.course-card h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--light-text);
    font-weight: 400;
}

.course-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

/* Course Description */
.course-description {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 8rem;
    color: var(--light-text);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    padding-top: 4rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.info-item .material-icons {
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* Timeline Schedule */
.timeline {
    position: relative;
}

.timeline-track {
    position: relative;
    padding-left: 2rem;
}

.timeline-track::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(var(--timeline-width) / 2);
    width: var(--timeline-width);
    background-color: var(--secondary-color);
    transform: translateX(-50%);
}

.module-header {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 2rem 0;
    padding-left: 0.5rem;
    text-align: center;
}

.module-label {
    background-color: var(--primary-color); /* Default color */
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.9rem;
    margin-right: 1rem;
}

/* Module-specific colors */
.module-header[data-module="1"] .module-label {
    background-color: #6366f1;
}

.module-header[data-module="2"] .module-label {
    background-color: #8b5cf6;
}

.module-header[data-module="3"] .module-label {
    background-color: #ec4899;
}

.module-header[data-module="4"] .module-label {
    background-color: #f43f5e;
}

.module-header[data-module="5"] .module-label {
    background-color: #f97316;
}

.module-header[data-module="6"] .module-label {
    background-color: #eab308;
}

.module-name {
    font-weight: 500;
    color: var(--light-text);
    font-size: 1.1rem;
}

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

.timeline-dot {
    position: absolute;
    margin-left: -2rem;
    margin-top: 2.25rem;
    width: var(--timeline-dot-size);
    height: var(--timeline-dot-size);
    border-radius: 50%;
    background-color: var(--timeline-color);
    z-index: 2;
    transform: translateX(-50%);
}

.timeline-content {
    padding-bottom: 1.5rem;
}

.week-box {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

.week-box:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.guest-chip {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: #ecfdf5;
    color: #065f46;
    border: 1px solid #059669;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.guest-chip .material-icons {
    font-size: 1rem;
}

.week-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.date-pill, .week-pill {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.date-pill {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--secondary-color);
    margin-right: 0.75rem;
}

.week-pill {
    background-color: rgba(99, 102, 241, 0.2);
    color: var(--secondary-color);
}

.readings-toggle {
    display: none;
}

.week-topic {
    font-weight: 500;
    font-size: 1.43em;
    margin-bottom: 0rem;
    display: inline-block;
    margin-right: 1rem;
}

.readings-content {
    max-height: 0;
    overflow: hidden;
    background-color: rgba(30, 41, 59, 0.5);
    border-radius: 8px;
    transition: all 0.3s ease;
    opacity: 0;
}

.readings-content.active {
    max-height: 1000px;
    padding: 1.25rem;
    margin-top: 1rem;
    padding-bottom: 0rem;
    opacity: 1;
}

.reading-section h5 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    color: var(--secondary-color);
}

.reading-section ul {
    font-size: 0.95rem;
}

.project-milestone {
    background-color: var(--card-bg);
    color: var(--text-color);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 400;
    display: block;
    margin-top: 0.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    width: 100%;
}

.project-milestone::before {
    content: "Due: ";
    font-weight: 700;
    color: var(--primary-color);
}

/* Assignments */
.assignments-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.assignment-item {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.assignment-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
}

.assignment-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-right: 1rem;
}

.assignment-header h3 {
    margin-bottom: 0;
    flex-grow: 1;
}

.toggle-icon {
    color: var(--light-text);
    transition: transform 0.3s ease;
}

.assignment-content {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.5s ease;
}

.assignment-item.active .assignment-content {
    max-height: 1000px;
    padding: 0 1.5rem 1.5rem;
}

.assignment-item.active .toggle-icon {
    transform: rotate(180deg);
}

.assignment-content strong {
    color: var(--primary-color);
}

.project-timeline {
    list-style: none;
    padding-left: 0;
    margin-top: 1.5rem;
    border-left: 2px solid var(--border-color);
}

.project-timeline li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
}

.project-timeline li::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 9px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary-color);
}

.project-timeline li span {
    font-weight: 500;
    color: var(--secondary-color);
    display: block;
    margin-bottom: 0.25rem;
}

/* Grading */
.grading-breakdown {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.grade-item {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.grade-percentage {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 70px;
}

.grade-description {
    font-size: 1.1rem;
}

/* Resources */
.resources-list {
    list-style: none;
    padding: 0;
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.resources-list li {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.75rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0;
}

.resources-list li:last-child {
    border-bottom: none;
}

.resources-list .material-icons {
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* Footer */
footer {
    background-color: var(--card-bg);
    color: var(--light-text);
    padding: 2rem 0;
    text-align: center;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .timeline-track {
        padding-left: 1.5rem;
    }
    
    .timeline-dot {
        margin-left: -1.5rem !important;
    }
    
    .module-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .module-label {
        margin-bottom: 0.5rem;
    }
    
    .week-header {
        flex-wrap: wrap;
    }
    
    .readings-toggle {
        margin-left: 0;
        margin-top: 0.5rem;
        width: 100%;
    }
    
    .course-info {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .grade-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* Animation for module highlighting */
.module-label[data-module="1"] {
    border-left: 4px solid #6366f1;
}

.module-label[data-module="2"] {
    border-left: 4px solid #8b5cf6;
}

.module-label[data-module="3"] {
    border-left: 4px solid #ec4899;
}

.module-label[data-module="4"] {
    border-left: 4px solid #f43f5e;
}

.module-label[data-module="5"] {
    border-left: 4px solid #f97316;
}

.module-label[data-module="6"] {
    border-left: 4px solid #eab308;
}

.timeline-item[data-module="1"] .timeline-dot {
    background-color: #6366f1;
}

.timeline-item[data-module="2"] .timeline-dot {
    background-color: #8b5cf6;
}

.timeline-item[data-module="3"] .timeline-dot {
    background-color: #ec4899;
}

.timeline-item[data-module="4"] .timeline-dot {
    background-color: #f43f5e;
}

.timeline-item[data-module="5"] .timeline-dot {
    background-color: #f97316;
}

.timeline-item[data-module="6"] .timeline-dot {
    background-color: #eab308;
}