/**
 * Sample Lesson Viewer for LearnDash
 * Main Stylesheet - v1.1.0
 */

/* Container */
.slv-sample-lessons-wrapper {
    margin: 20px 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

/* Course Section */
.slv-course-section {
    margin-bottom: 40px;
}

.slv-course-title {
    font-size: 1.5em;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #0073aa;
    color: #23282d;
}

.slv-course-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.slv-course-title a:hover {
    color: #0073aa;
}

/* Lessons Grid */
.slv-lessons-grid {
    display: grid;
    gap: 24px;
}

.slv-columns-1 {
    grid-template-columns: 1fr;
}

.slv-columns-2 {
    grid-template-columns: repeat(2, 1fr);
}

.slv-columns-3 {
    grid-template-columns: repeat(3, 1fr);
}

.slv-columns-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Lesson Card */
.slv-lesson-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.slv-lesson-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

/* Video Container - 16:9 Aspect Ratio */
.slv-video-container {
    position: relative;
    width: 100%;
    background: #000;
}

.slv-video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
}

.slv-video-wrapper iframe,
.slv-video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.slv-video-wrapper video {
    background: #000;
}

/* Lesson Thumbnail */
.slv-lesson-thumbnail {
    overflow: hidden;
}

.slv-lesson-thumbnail img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.slv-lesson-card:hover .slv-lesson-thumbnail img {
    transform: scale(1.05);
}

/* Lesson Content */
.slv-lesson-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.slv-lesson-title {
    font-size: 1.1em;
    font-weight: 600;
    margin: 0 0 10px 0;
    line-height: 1.3;
}

.slv-lesson-title a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
}

.slv-lesson-title a:hover {
    color: #0073aa;
}

.slv-lesson-course {
    display: block;
    font-size: 0.85em;
    color: #666;
    margin-bottom: 10px;
    font-style: italic;
}

.slv-lesson-excerpt {
    font-size: 0.9em;
    color: #555;
    margin-bottom: 15px;
    line-height: 1.6;
    flex-grow: 1;
}

/* View Lesson Button */
.slv-lesson-link {
    display: inline-block;
    padding: 10px 20px;
    background: #0073aa;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.9em;
    font-weight: 500;
    transition: background 0.3s ease, transform 0.2s ease;
    text-align: center;
    align-self: flex-start;
}

.slv-lesson-link:hover {
    background: #005177;
    color: #fff;
    transform: translateY(-1px);
}

/* Messages */
.slv-no-lessons,
.slv-error {
    padding: 20px;
    background: #f7f7f7;
    border-left: 4px solid #0073aa;
    margin: 20px 0;
    font-size: 1em;
    color: #555;
}

.slv-error {
    border-left-color: #dc3232;
    background: #fef7f7;
}

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

/* Mobile - Single column */
@media (max-width: 768px) {
    .slv-columns-2,
    .slv-columns-3,
    .slv-columns-4 {
        grid-template-columns: 1fr;
    }

    .slv-lesson-content {
        padding: 15px;
    }

    .slv-course-title {
        font-size: 1.3em;
    }

    .slv-lessons-grid {
        gap: 16px;
    }
}

/* Tablet - 2 columns max */
@media (min-width: 769px) and (max-width: 1024px) {
    .slv-columns-3,
    .slv-columns-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Large screens - Optimized for video display */
@media (min-width: 1025px) and (max-width: 1399px) {
    .slv-with-video .slv-columns-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .slv-with-video .slv-columns-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Extra large screens - Full column support for videos */
@media (min-width: 1400px) {
    .slv-with-video .slv-columns-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .slv-with-video .slv-columns-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .slv-with-video .slv-columns-4 {
        grid-template-columns: repeat(4, 1fr);
    }

    .slv-lessons-grid {
        gap: 30px;
    }
}

/* Ultra wide screens */
@media (min-width: 1800px) {
    .slv-with-video .slv-columns-2 {
        grid-template-columns: repeat(2, 1fr);
        max-width: 1600px;
    }

    .slv-with-video .slv-columns-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .slv-with-video .slv-columns-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* =====================================================
   VIDEO-SPECIFIC STYLES
   ===================================================== */

/* Cards with video get special treatment */
.slv-lesson-card.slv-has-video {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.slv-lesson-card.slv-has-video:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* Video play indicator overlay (for future enhancement) */
.slv-video-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent;
    z-index: 1;
    pointer-events: none;
    transition: background 0.3s ease;
}

/* =====================================================
   DARK MODE SUPPORT
   ===================================================== */

@media (prefers-color-scheme: dark) {
    .slv-lesson-card {
        background: #2d2d2d;
        border-color: #444;
    }

    .slv-lesson-title a {
        color: #e0e0e0;
    }

    .slv-lesson-title a:hover {
        color: #5cb8e6;
    }

    .slv-lesson-course,
    .slv-lesson-excerpt {
        color: #aaa;
    }

    .slv-course-title {
        color: #e0e0e0;
        border-bottom-color: #5cb8e6;
    }

    .slv-course-title a:hover {
        color: #5cb8e6;
    }

    .slv-no-lessons {
        background: #2d2d2d;
        color: #aaa;
    }

    .slv-lesson-link {
        background: #5cb8e6;
    }

    .slv-lesson-link:hover {
        background: #3a9fd0;
    }
}

/* =====================================================
   PRINT STYLES
   ===================================================== */

@media print {
    .slv-video-container,
    .slv-video-wrapper {
        display: none;
    }

    .slv-lesson-card {
        break-inside: avoid;
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .slv-lessons-grid {
        display: block;
    }

    .slv-lesson-card {
        margin-bottom: 20px;
    }
}