/* page background */
body {
    background-color: #e0f7ff;
    min-height: 120vh;
}

/* course title styles */
.course-title {
    padding: 10px 120px 0px;
}

.course-title h1 {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 30px;
    text-align: left;
    font-family: var(--font-titles);
}

/* main content layout structure */
.course-content {
    display: flex;
    padding: 0 120px;
    gap: 60px;
}

.left-content {
    flex: 1;
}

.right-sidebar {
    width: 320px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.right-sidebar > div {
    background-color: #fffffeb0;
    border-radius: 15px;
    padding: 40px 20px;
    height: fit-content;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    margin-top: 10px;

}
.resource-list {
    gap: 35px;
}

/* content section styling */
.section {
    margin-bottom: 40px;
}

.section h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
    font-family: var(--font-titles);
}

.section p {
    font-size: 19px;
    font-weight: normal;
    line-height: 1.6;
    color: var(--text-dark);
    font-family: var(--font-text);
}

/* curriculum expandable sections */
.curriculum-container {
    background-color: #fffffeb0;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    padding: 20px;
    margin: 30px 0;
}
.curriculum-item {
    padding: 15px 20px;
    border-bottom: 1px solid #f5f5f5;
    border-radius: 20px;
}
.curriculum-item:hover {
    background-color: #f5f5f5;
}
.curriculum-item:last-child {
    border-bottom: none;
}
/* curriculum header/toggle button */
.curriculum-header {
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
}
.curriculum-header.active h3 {
    color: var(--accent-light);
}
.curriculum-item:hover h3 {
    color: var(--accent-light);
}
.curriculum-item:hover .play-icon {
    color: var(--accent-light);
}


/* toggle icons for curriculum items */
.triangle-icon {
    color: var(--accent-light);
}
.play-icon {
    color: var(--text-dark);
    transition: color 0.3s;
}


/* curriculum text styling */
.curriculum-item h3 {
    font-size: 23px;
    font-weight: bold;
    font-family: var(--font-titles);
    transition: color 0.3s;
}
.curriculum-item p {
    margin-top: 12px;
    margin-left: 35px;
    font-size: 17px;
    font-family: var(--font-text);
    color: #505050;
}
/* curriculum content toggle display */
.curriculum-content {
    display: none;
}
.curriculum-content.active {
    display: block;
}


/* sidebar resource items */
.resource-item {
    display: flex;
    align-items: center;
    gap: 20px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease;
    padding: 0px 20px;
}
.resource-item:hover {
    transform: translateY(-2px);
}
/* resource icon container */
.resource-icon {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.resource-icon img {
    width: 100%;
    height: auto;
}

/* resource text content */
.resource-content {
    flex: 1;
}

.resource-content h3 {
    font-size: 25px;
    font-weight: 600;
    color: var(--accent-light);
    font-family: var(--font-text-secondary);
    margin-bottom: 2px;
    line-height: 1.1;
}

.resource-content p {
    font-size: 15px;
    font-weight: 500;
    color: #505050;
    font-family: var(--font-text);
}


/* feedback section styling */
.feedback-section {
    padding: 30px;
    margin-top: 20px;
}
.feedback-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}
.like-dislike-container {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}
.feedback-button {
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    background-color: #f0f0f0;
    cursor: pointer;
    font-family: var(--font-text);
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}
.like-button:hover {
    background-color: #e1f7e1;
    color: #2e8b57;
}
.dislike-button:hover {
    background-color: #ffe1e1;
    color: #d32f2f;
}
.feedback-button.active {
    background-color: var(--accent-light);
    color: white;
}
.comment-container {
    display: flex;
    gap: 10px;
}
#comment-input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: var(--font-text);
    font-size: 14px;
}
#submit-comment {
    background-color: var(--accent-light);
    color: white;
}
#submit-comment:hover {
    filter: brightness(0.9);
}