/**
 * Surgedu Education
 * Course & Lesson UI
 *
 * Curriculum
 * Lesson Sidebar
 * Lesson Navigation
 */


/* ==========================================================
   COURSE CURRICULUM
   ========================================================== */

.surgedu-course-curriculum {
    margin-top: 48px;
    padding-top: 40px;
    border-top: 1px solid #e5e7eb;
}


.surgedu-course-curriculum-title {
    margin: 0 0 24px;
    font-size: 28px;
    line-height: 1.25;
}


.surgedu-course-curriculum-modules {
    display: flex;
    flex-direction: column;
    gap: 16px;
}


.surgedu-course-curriculum-module {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
}


.surgedu-course-curriculum-module-title {
    margin: 0;
    padding: 16px 20px;
    font-size: 18px;
    line-height: 1.4;
    font-weight: 600;
    background: #f8f9fa;
    border-bottom: 1px solid #e5e7eb;
}


.surgedu-course-curriculum-lessons {
    list-style: none;
    margin: 0;
    padding: 0;
}


.surgedu-course-curriculum-lesson {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 0;
    padding: 15px 20px;
    border-bottom: 1px solid #f0f1f2;
}


.surgedu-course-curriculum-lesson:last-child {
    border-bottom: 0;
}


.surgedu-course-curriculum-lesson-number {
    flex: 0 0 32px;
    font-size: 13px;
    font-weight: 600;
    color: #6b7280;
}


.surgedu-course-curriculum-lesson-link {
    flex: 1;
    text-decoration: none;
    font-weight: 500;
}


.surgedu-course-curriculum-lesson-link:hover {
    text-decoration: underline;
}


/* ==========================================================
   LESSON LAYOUT
   ========================================================== */

.surgedu-lesson-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: start;
}


.surgedu-lesson-main {
    min-width: 0;
}


.surgedu-lesson-sidebar {
    min-width: 0;
}


/* ==========================================================
   LESSON BREADCRUMB
   ========================================================== */

.surgedu-lesson-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 32px;
    font-size: 14px;
    line-height: 1.5;
    color: #6b7280;
}


.surgedu-lesson-breadcrumb a {
    text-decoration: none;
}


.surgedu-lesson-breadcrumb a:hover {
    text-decoration: underline;
}


.surgedu-lesson-breadcrumb-separator {
    color: #9ca3af;
}


/* ==========================================================
   LESSON HEADER
   ========================================================== */

.surgedu-lesson-header {
    margin-bottom: 40px;
}


.surgedu-lesson-number {
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #6b7280;
}


.surgedu-lesson-title {
    margin: 0;
    font-size: clamp(32px, 4vw, 48px);
    line-height: 1.1;
}


.surgedu-lesson-module {
    margin-top: 12px;
    font-size: 16px;
    color: #6b7280;
}


/* ==========================================================
   LESSON CONTENT
   ========================================================== */

.surgedu-lesson-content {
    font-size: 18px;
    line-height: 1.75;
}


.surgedu-lesson-content > *:first-child {
    margin-top: 0;
}


.surgedu-lesson-content img {
    max-width: 100%;
    height: auto;
}


/* ==========================================================
   LESSON SIDEBAR
   ========================================================== */

.surgedu-lesson-curriculum {
    position: sticky;
    top: 32px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: #fff;
    overflow: hidden;
}


.surgedu-lesson-curriculum > h2 {
    margin: 0;
    padding: 18px 20px;
    font-size: 18px;
    line-height: 1.3;
    border-bottom: 1px solid #e5e7eb;
}


.surgedu-lesson-sidebar-module {
    padding: 16px 20px;
    border-bottom: 1px solid #f0f1f2;
}


.surgedu-lesson-sidebar-module:last-child {
    border-bottom: 0;
}


.surgedu-lesson-sidebar-module h3 {
    margin: 0 0 10px;
    font-size: 14px;
    line-height: 1.4;
    font-weight: 600;
}


.surgedu-lesson-sidebar-module ul {
    list-style: none;
    margin: 0;
    padding: 0;
}


.surgedu-lesson-sidebar-module li {
    margin: 0;
}


.surgedu-lesson-sidebar-module li a {
    display: block;
    padding: 8px 10px;
    margin: 0 -10px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.4;
}


.surgedu-lesson-sidebar-module li a:hover {
    background: #f3f4f6;
}


.surgedu-lesson-sidebar-module li.is-current a {
    font-weight: 600;
    background: #f3f4f6;
}


/* ==========================================================
   LESSON NAVIGATION
   ========================================================== */

.surgedu-lesson-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
}


.surgedu-lesson-navigation-previous,
.surgedu-lesson-navigation-next {
    min-width: 0;
}


.surgedu-lesson-navigation-next {
    text-align: right;
}


.surgedu-lesson-navigation a {
    display: block;
    padding: 16px 18px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    text-decoration: none;
    background: #fff;
}


.surgedu-lesson-navigation a:hover {
    background: #f8f9fa;
}


.surgedu-lesson-navigation a span {
    display: block;
    margin-top: 5px;
    font-size: 14px;
    line-height: 1.4;
    font-weight: 600;
}


/* ==========================================================
   RESPONSIVE
   ========================================================== */

@media ( max-width: 900px ) {

    .surgedu-lesson-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }


    .surgedu-lesson-sidebar {
        order: 2;
    }


    .surgedu-lesson-main {
        order: 1;
    }


    .surgedu-lesson-curriculum {
        position: static;
    }

}


@media ( max-width: 600px ) {

    .surgedu-course-curriculum {
        margin-top: 36px;
        padding-top: 32px;
    }


    .surgedu-course-curriculum-title {
        font-size: 24px;
    }


    .surgedu-course-curriculum-lesson {
        gap: 10px;
        padding: 13px 16px;
    }


    .surgedu-course-curriculum-module-title {
        padding: 14px 16px;
    }


    .surgedu-lesson-breadcrumb {
        margin-bottom: 24px;
        font-size: 13px;
    }


    .surgedu-lesson-header {
        margin-bottom: 28px;
    }


    .surgedu-lesson-title {
        font-size: 32px;
    }


    .surgedu-lesson-content {
        font-size: 16px;
        line-height: 1.7;
    }


    .surgedu-lesson-navigation {
        grid-template-columns: 1fr;
    }


    .surgedu-lesson-navigation-next {
        text-align: left;
    }

}



/* ==========================================================
   LESSON COMPLETION
   ========================================================== */

.surgedu-lesson-completion {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
}


.surgedu-mark-complete {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 10px 20px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: #8D44D7;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
}


.surgedu-mark-complete:hover {
    background: #5E1FA6;
}


.surgedu-mark-complete:disabled {
    cursor: default;
    opacity: 1;
}


.surgedu-mark-complete.is-completed {
    background: #8D44D7;
}



/* ==========================================================
   COURSE PROGRESS
   ========================================================== */

.surgedu-course-progress {
    margin-top: 40px;
    margin-bottom: 40px;
    padding: 24px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: #fff;
}


.surgedu-course-progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 14px;
}


.surgedu-course-progress-title {
    margin: 0;
    font-size: 20px;
    line-height: 1.3;
}


.surgedu-course-progress-percent {
    font-size: 20px;
    line-height: 1;
}


.surgedu-course-progress-bar {
    width: 100%;
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: #e5e7eb;
}


.surgedu-course-progress-bar-fill {
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: currentColor;
    transition: width 0.3s ease;
}


.surgedu-course-progress-summary {
    margin: 12px 0 0;
    font-size: 14px;
    color: #6b7280;
}


/* ==========================================================
   CURRICULUM COMPLETION STATUS
   ========================================================== */

.surgedu-course-curriculum-lesson-status {
    flex: 0 0 20px;
    font-size: 15px;
    font-weight: 600;
}


.surgedu-course-curriculum-lesson.is-completed
.surgedu-course-curriculum-lesson-status {
    font-weight: 700;
}


.surgedu-course-curriculum-lesson.is-completed
.surgedu-course-curriculum-lesson-link {
    font-weight: 600;
}


/* ==========================================================
   RESPONSIVE
   ========================================================== */

@media ( max-width: 600px ) {

    .surgedu-course-progress {
        padding: 20px;
    }


    .surgedu-course-progress-title {
        font-size: 18px;
    }


    .surgedu-course-progress-percent {
        font-size: 18px;
    }

}


/* ==========================================================
   CURRICULUM LESSON STATUS
   ========================================================== */

.surgedu-course-curriculum-lesson-status {
    flex: 0 0 20px;
    width: 20px;
    text-align: center;
    font-size: 15px;
    line-height: 1;
    font-weight: 600;
}


.surgedu-course-curriculum-lesson.is-completed
.surgedu-course-curriculum-lesson-status {
    font-weight: 700;
}


.surgedu-course-curriculum-lesson.is-completed
.surgedu-course-curriculum-lesson-link {
    font-weight: 600;
}


/* ==========================================================
   LESSON CURRICULUM STATUS
   ========================================================== */

.surgedu-lesson-sidebar-module ul {
    list-style: none;
    margin: 0;
    padding: 0;
}


.surgedu-lesson-sidebar-module li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}


.surgedu-lesson-sidebar-status {
    flex: 0 0 18px;
    width: 18px;
    text-align: center;
    line-height: 1.5;
    font-weight: 600;
}


.surgedu-lesson-sidebar-module li.is-current
.surgedu-lesson-sidebar-status {
    font-weight: 700;
}


.surgedu-lesson-sidebar-module li.is-completed
a {
    font-weight: 600;
}

/* ==========================================================
 * COURSE CURRICULUM
 * ========================================================== */

.surgedu-course-curriculum {
    margin-top: 48px;
}

.surgedu-course-curriculum-title {
    margin-bottom: 28px;
}


/*
 * Module
 */
.surgedu-course-curriculum-module {
    margin-bottom: 32px;
}

.surgedu-course-curriculum-module-title {
    margin-bottom: 12px;
}


/*
 * Lesson list
 */
.surgedu-course-curriculum-lessons {
    list-style: none;
    margin: 0;
    padding: 0;
}


/*
 * Lesson row
 */
.surgedu-course-curriculum-lesson {
    display: flex;
    align-items: center;
    gap: 10px;

    margin: 0;
    padding: 10px 0;

    border-bottom: 1px solid #e5e5e5;
}


/*
 * Lesson number
 */
.surgedu-course-curriculum-lesson-number {
    flex: 0 0 32px;

    font-size: 14px;
    font-weight: 600;

    color: #777;
}


/*
 * Status icon
 */
.surgedu-course-curriculum-lesson-status {
    flex: 0 0 22px;

    width: 22px;
    text-align: center;

    font-size: 15px;
}


/*
 * Lesson link
 */
.surgedu-course-curriculum-lesson-link {
    flex: 1;

    text-decoration: none;
}


/*
 * Available lesson
 */
.surgedu-course-curriculum-lesson.is-available
.surgedu-course-curriculum-lesson-link {
    font-weight: 500;
}


/*
 * Completed lesson
 */
.surgedu-course-curriculum-lesson.is-completed
.surgedu-course-curriculum-lesson-link {
    font-weight: 600;
}


/*
 * Preview lesson
 */
.surgedu-course-curriculum-lesson.is-preview
.surgedu-course-curriculum-lesson-link {
    font-weight: 600;
}


/*
 * Preview label
 */
.surgedu-course-curriculum-lesson-preview {
    flex: 0 0 auto;

    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}


/*
 * Locked lesson
 */
.surgedu-course-curriculum-lesson-locked {
    flex: 1;

    color: #777;
}


/*
 * Status states
 */
.surgedu-course-curriculum-lesson.is-completed
.surgedu-course-curriculum-lesson-status {
    font-weight: 700;
}

.surgedu-course-curriculum-lesson.is-preview
.surgedu-course-curriculum-lesson-status {
    font-weight: 700;
}

.surgedu-course-curriculum-lesson.is-locked
.surgedu-course-curriculum-lesson-status {
    opacity: 0.7;
}


/*
 * Locked lesson should not look clickable.
 */
.surgedu-course-curriculum-lesson.is-locked {
    cursor: default;
}


/*
 * Mobile
 */
@media (max-width: 767px) {

    .surgedu-course-curriculum-lesson {
        gap: 8px;
        padding: 9px 0;
    }

    .surgedu-course-curriculum-lesson-number {
        flex-basis: 28px;
        font-size: 13px;
    }

    .surgedu-course-curriculum-lesson-status {
        flex-basis: 20px;
        width: 20px;
    }

    .surgedu-course-curriculum-lesson-preview {
        font-size: 11px;
    }

}

/* ==========================================================
 * LOCKED LESSON
 * ========================================================== */

.surgedu-lesson-locked {
    margin: 32px 0;
    padding: 32px;

    border: 1px solid #e5e5e5;

    text-align: center;
}

.surgedu-lesson-locked-icon {
    margin-bottom: 12px;
    font-size: 28px;
}

.surgedu-lesson-locked h2 {
    margin: 0 0 10px;
}

.surgedu-lesson-locked p {
    margin: 0 0 20px;
}

.surgedu-lesson-locked-button {
    display: inline-block;
    padding: 10px 18px;

    text-decoration: none;
    font-weight: 600;
}

/* ==========================================================
 * COURSE COMPLETED
 * ========================================================== */

.surgedu-course-progress.is-completed {
    /* Keeps the completed state visually distinct. */
}

.surgedu-course-completed {
    display: flex;
    align-items: center;
    gap: 8px;

    margin-top: 16px;

    font-weight: 600;
}

.surgedu-course-completed-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 24px;
    height: 24px;

    font-weight: 700;
}

/* ==========================================================
 * COURSE LEARNING ACTION
 * ========================================================== */

.surgedu-course-learning-action {
    margin-top: 20px;
}

.surgedu-course-learning-button {
    display: inline-block;

    padding: 11px 20px;

    text-decoration: none;
    font-weight: 600;
}

.surgedu-course-learning-completed {
    display: flex;
    align-items: center;
    gap: 8px;

    margin-bottom: 12px;

    font-weight: 600;
}

.surgedu-course-learning-completed-icon {
    font-weight: 700;
}

.surgedu-module-lessons:empty {
    min-height: 40px;
    border: 1px dashed #dcdcde;
    padding: 12px;
    margin-bottom: 8px;
}