.kfa-main-pdf-tutorial-course-hero {
    background: linear-gradient(135deg, #004289 0%, #0053b3 50%, #007bff 100%);
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
}

.kfa-main-pdf-tutorial-course-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(rgba(255, 255, 255, .08) 2px,
            transparent 2px);
    background-size: 35px 35px;
    opacity: .4;
}

.kfa-main-pdf-tutorial-course-hero .container {
    position: relative;
    z-index: 2;
}

.kfa-main-pdf-tutorial-course-icon {
    width: 120px;
    height: 120px;
    background: #fff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .15);
}

.kfa-main-pdf-tutorial-course-icon img {
    width: 100%;
    height: auto;
}

.kfa-main-pdf-tutorial-course-title {
    color: #fff;
    font-size: 34px;
    font-weight: 700;
    line-height: 1.2;
}

.kfa-main-pdf-tutorial-premium-badge {
    background: #ffd600;
    color: #000;
    font-size: 11px;
    font-weight: 700;
    padding: 5px 10px;
    border-radius: 6px;
    letter-spacing: .5px;
}

.kfa-main-pdf-tutorial-course-subtitle {
    color: rgba(255, 255, 255, .9);
    margin-bottom: 20px;
    font-size: 18px;
}

.kfa-main-pdf-tutorial-course-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.kfa-main-pdf-tutorial-stat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-size: 15px;
}

.kfa-main-pdf-tutorial-stat-item i {
    font-size: 18px;
    color: #fff;
}

/* ============================================================
   TOP NAV
============================================================ */
.kfa-main-pdf-tutorial-top-nav {
    background: linear-gradient(90deg, #db3a3a 0%, #d11b63 25%, #b12488 50%, #7b3ba3 75%, #004aad 100%);
    height: 56px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 1;
    border-top: 1px solid white;
}

.kfa-main-pdf-tutorial-top-nav-inner {
    display: flex;
    align-items: center;
    gap: 32px;
    width: 100%;
}

.kfa-main-pdf-tutorial-brand-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    font-size: 16px;
    font-weight: 500;
    white-space: nowrap;
}

.kfa-main-pdf-tutorial-brand-logo i {
    font-size: 20px;
    color: #ffffff;
}

.kfa-main-pdf-tutorial-brand-logo strong {
    font-weight: 700;
}

.kfa-main-pdf-tutorial-breadcrumb-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.80);
}

.kfa-main-pdf-tutorial-breadcrumb-bar a {
    color: rgba(255, 255, 255, 0.80);
    transition: color 0.2s;
}

.kfa-main-pdf-tutorial-breadcrumb-bar a:hover {
    color: #ffffff;
}

.kfa-main-pdf-tutorial-breadcrumb-bar .kfa-main-pdf-tutorial-sep {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.55);
}

.kfa-main-pdf-tutorial-breadcrumb-bar .kfa-main-pdf-tutorial-active-crumb {
    color: #ffffff;
    font-weight: 500;
}

/* ============================================================
   PAGE WRAPPER – 3-COLUMN LAYOUT
============================================================ */
.kfa-main-pdf-tutorial-page-wrapper {
    display: flex;
    align-items: flex-start;
    max-width: 1440px;
    margin: 30px auto;
}

/* ============================================================
   LEFT SIDEBAR
============================================================ */
.kfa-main-pdf-tutorial-left-sidebar {
    width: 260px;
    min-width: 260px;
    background: #ffffff;
    border-right: 1px solid #e2e6f0;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 56px;
    overflow-y: auto;
}

.kfa-main-pdf-tutorial-left-sidebar::-webkit-scrollbar {
    width: 4px;
}

.kfa-main-pdf-tutorial-left-sidebar::-webkit-scrollbar-thumb {
    background: #d1d5e0;
    border-radius: 4px;
}

.kfa-main-pdf-tutorial-sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px 14px;
    font-size: 14px;
    font-weight: 600;
    color: #1a1a2e;
    border-bottom: 1px solid #e8eaf0;
    background: #fafbfe;
}

.kfa-main-pdf-tutorial-sidebar-header i {
    color: #7b3ba3;
    font-size: 15px;
}

/* Course List */
.kfa-main-pdf-tutorial-course-list {
    list-style: none;
    flex: 1;
}

.kfa-main-pdf-tutorial-course-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    cursor: pointer;
    transition: background 0.18s;
    border-bottom: 1px solid #f0f2f8;
}

.kfa-main-pdf-tutorial-course-item:hover {
    background: #f3f0fb;
}

.kfa-main-pdf-tutorial-course-item.kfa-main-pdf-tutorial-active {
    background: linear-gradient(90deg, #7b3ba3 0%, #004aad 100%);
    color: #ffffff;
}

.kfa-main-pdf-tutorial-course-item .kfa-main-pdf-tutorial-num {
    font-size: 11px;
    font-weight: 700;
    color: #7b3ba3;
    min-width: 20px;
}

.kfa-main-pdf-tutorial-course-item.kfa-main-pdf-tutorial-active .kfa-main-pdf-tutorial-num {
    color: rgba(255, 255, 255, 0.75);
}

.kfa-main-pdf-tutorial-course-item .kfa-main-pdf-tutorial-label {
    font-size: 13px;
    color: #3a3a5c;
    font-weight: 400;
    line-height: 1.3;
}

.kfa-main-pdf-tutorial-course-item.kfa-main-pdf-tutorial-active .kfa-main-pdf-tutorial-label {
    color: #ffffff;
    font-weight: 500;
}

/* Sidebar Bottom CTA */
.kfa-main-pdf-tutorial-sidebar-bottom-cta {
    background: linear-gradient(135deg, #db3a3a 0%, #b12488 50%, #7b3ba3 100%);
    padding: 18px 20px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    color: #ffffff;
    margin-top: auto;
}

.kfa-main-pdf-tutorial-cta-icon {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.20);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.kfa-main-pdf-tutorial-cta-small {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.75);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 2px;
}

.kfa-main-pdf-tutorial-cta-title {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 2px;
}

.kfa-main-pdf-tutorial-cta-sub {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.80);
    margin-bottom: 10px;
    line-height: 1.4;
}

.kfa-main-pdf-tutorial-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.20);
    border: 1px solid rgba(255, 255, 255, 0.40);
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    padding: 7px 14px;
    border-radius: 6px;
    transition: background 0.2s;
}

.kfa-main-pdf-tutorial-cta-btn:hover {
    background: rgba(255, 255, 255, 0.30);
    color: #ffffff;
}

/* ============================================================
   CENTER CONTENT
============================================================ */
.kfa-main-pdf-tutorial-center-content {
    flex: 1;
    padding: 28px 28px 40px;
    min-width: 0;
}

/* Page Title Row */
.kfa-main-pdf-tutorial-page-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 16px;
    flex-wrap: wrap;
}

.kfa-main-pdf-tutorial-page-title-left {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.kfa-main-pdf-tutorial-page-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
    line-height: 1.2;
}

.kfa-main-pdf-tutorial-premium-badge i {
    font-size: 10px;
    margin-right: 3px;
}

/* Download PDF button */
.kfa-main-pdf-tutorial-dl-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #ffffff;
    border: 2px solid #004aad;
    color: #004aad;
    font-size: 13px;
    font-weight: 600;
    padding: 9px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.kfa-main-pdf-tutorial-dl-btn:hover {
    background: #004aad;
    color: #ffffff;
}

/* ============================================================
   PDF VIEWER
============================================================ */
.kfa-main-pdf-tutorial-pdf-viewer-wrap {
    background: #3c3c3c;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.22);
}

.kfa-main-pdf-tutorial-pdf-page {
    background: #525252;
    padding: 0;
    display: block;
    width: 100%;
}

.kfa-main-pdf-tutorial-pdf-iframe {
    width: 100%;
    height: 800px;
    border: none;
    display: block;
}

/* ============================================================
   CHAPTER NAVIGATION
============================================================ */
.kfa-main-pdf-tutorial-chapter-nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 24px;
    gap: 16px;
}

.kfa-main-pdf-tutorial-chapter-nav-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.kfa-main-pdf-tutorial-prev-btn {
    background: #ffffff;
    color: #3a3a5c;
    border: 2px solid #e0e3ef;
}

.kfa-main-pdf-tutorial-prev-btn:hover {
    background: #f0f2f8;
    border-color: #c5c9dc;
}

.kfa-main-pdf-tutorial-next-btn {
    background: linear-gradient(90deg, #7b3ba3 0%, #004aad 100%);
    color: #ffffff;
    border: 2px solid transparent;
}

.kfa-main-pdf-tutorial-next-btn:hover {
    background: linear-gradient(90deg, #6a309a 0%, #003d94 100%);
    box-shadow: 0 4px 14px rgba(0, 74, 173, 0.30);
}

/* ============================================================
   RIGHT SIDEBAR
============================================================ */
.kfa-main-pdf-tutorial-right-sidebar {
    width: 300px;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 56px;
    overflow-y: auto;
}

.kfa-main-pdf-tutorial-right-sidebar::-webkit-scrollbar {
    width: 4px;
}

.kfa-main-pdf-tutorial-right-sidebar::-webkit-scrollbar-thumb {
    background: #d1d5e0;
    border-radius: 4px;
}

/* Compiler Card */
.kfa-main-pdf-tutorial-rs-compiler-card {
    background: linear-gradient(135deg, #7b3ba3 0%, #004aad 100%);
    border-radius: 12px;
    padding: 18px 16px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(0, 74, 173, 0.25);
}

.kfa-main-pdf-tutorial-rs-compiler-icon {
    width: 52px;
    height: 52px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.kfa-main-pdf-tutorial-rs-small {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.70);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 500;
    margin-bottom: 2px;
}

.kfa-main-pdf-tutorial-rs-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
}

.kfa-main-pdf-tutorial-rs-sub {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.45;
    margin-bottom: 12px;
}

.kfa-main-pdf-tutorial-rs-compiler-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #ffffff;
    color: #004aad;
    font-size: 12px;
    font-weight: 700;
    padding: 7px 16px;
    border-radius: 6px;
    transition: box-shadow 0.2s;
}

.kfa-main-pdf-tutorial-rs-compiler-btn:hover {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
    color: #7b3ba3;
}

/* RS Section */
.kfa-main-pdf-tutorial-rs-section {
    background: #ffffff;
    border-radius: 10px;
    padding: 16px;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
}

.kfa-main-pdf-tutorial-rs-section-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 4px;
}

.kfa-main-pdf-tutorial-rs-section-header i {
    color: #7b3ba3;
    font-size: 14px;
}

.kfa-main-pdf-tutorial-rs-section-sub {
    font-size: 11px;
    color: #7a7a9a;
    margin-bottom: 12px;
}

/* RS Course List */
.kfa-main-pdf-tutorial-rs-course-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.kfa-main-pdf-tutorial-rs-course-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 7px;
    cursor: pointer;
    transition: background 0.15s;
    border: 1px solid #f0f2f8;
}

.kfa-main-pdf-tutorial-rs-course-item:hover {
    background: #f3f0fb;
}

.kfa-main-pdf-tutorial-rsc-icon {
    width: 30px;
    height: 30px;
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #ffffff;
    flex-shrink: 0;
}

.kfa-main-pdf-tutorial-rsc-cpp {
    background: #004aad;
}

.kfa-main-pdf-tutorial-rsc-py {
    background: #d11b63;
}

.kfa-main-pdf-tutorial-rsc-java {
    background: #db3a3a;
}

.kfa-main-pdf-tutorial-rsc-ds {
    background: #b12488;
}

.kfa-main-pdf-tutorial-rsc-db {
    background: #7b3ba3;
}

.kfa-main-pdf-tutorial-rsc-web {
    background: linear-gradient(135deg, #db3a3a, #004aad);
}

.kfa-main-pdf-tutorial-rsc-label {
    font-size: 12px;
    color: #2a2a3e;
    font-weight: 500;
    flex: 1;
}

.kfa-main-pdf-tutorial-rsc-arrow {
    font-size: 10px;
    color: #a0a0c0;
}

/* RS Download List */
.kfa-main-pdf-tutorial-rs-download-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.kfa-main-pdf-tutorial-rs-download-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border: 1px solid #e8eaf5;
    border-radius: 7px;
    cursor: pointer;
    transition: background 0.15s;
}

.kfa-main-pdf-tutorial-rs-download-item:hover {
    background: #f3f0fb;
}

.kfa-main-pdf-tutorial-dl-icon {
    font-size: 14px;
    color: #7b3ba3;
    width: 20px;
    text-align: center;
}

.kfa-main-pdf-tutorial-dl-label {
    font-size: 12px;
    color: #2a2a3e;
    font-weight: 500;
    flex: 1;
}

.kfa-main-pdf-tutorial-dl-arrow {
    font-size: 13px;
    color: #004aad;
}

/* YouTube Section */
.kfa-main-pdf-tutorial-yt-red {
    color: #db3a3a !important;
}

.kfa-main-pdf-tutorial-rs-yt-card {
    margin-top: 8px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e0e3ef;
}

.kfa-main-pdf-tutorial-rs-yt-thumb {
    width: 100%;
    height: 150px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.kfa-main-pdf-tutorial-rs-yt-thumb img {
    height: 100%;
    width: 100%;
    object-fit: contain;
}


.kfa-main-pdf-tutorial-rs-yt-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 14px;
    font-size: 12px;
    font-weight: 600;
    color: #1a1a2e;
    background: #f8f9ff;
    border-top: 1px solid #e0e3ef;
    transition: background 0.15s;
}

.kfa-main-pdf-tutorial-rs-yt-link:hover {
    background: #eeedf8;
    color: #7b3ba3;
}

.kfa-main-pdf-tutorial-rs-yt-link i {
    font-size: 11px;
    color: #db3a3a;
}


/* ============================================================
   GLOBAL RESPONSIVE FIXES
============================================================ */

img,
iframe,
video,
canvas {
    max-width: 100%;
}

.kfa-main-pdf-tutorial-page-wrapper {
    width: 100%;
}

.kfa-main-pdf-tutorial-center-content {
    min-width: 0;
}

.kfa-main-pdf-tutorial-pdf-viewer-wrap {
    width: 100%;
    overflow: hidden;
}

.kfa-main-pdf-tutorial-pdf-page {
    overflow: auto;
}


/* ============================================================
   1024px - SMALL LAPTOP
============================================================ */
@media (max-width: 1024px) {

    .kfa-main-pdf-tutorial-page-wrapper {
        padding: 0 15px;
        margin: 20px auto;
    }

    .kfa-main-pdf-tutorial-left-sidebar {
        width: 220px;
        min-width: 220px;
    }

    .kfa-main-pdf-tutorial-right-sidebar {
        width: 260px;
        min-width: 260px;
    }

    .kfa-main-pdf-tutorial-center-content {
        padding: 20px 16px;
    }

    .kfa-main-pdf-tutorial-page-title {
        font-size: 18px;
    }

    .kfa-main-pdf-tutorial-pdf-iframe {
        height: 680px;
    }

    .kfa-main-pdf-tutorial-course-title {
        font-size: 28px;
    }

    .kfa-main-pdf-tutorial-course-subtitle {
        font-size: 16px;
    }

}

/* ============================================================
   768px - TABLET
============================================================ */
@media (max-width: 768px) {

    /* Hero */
    .kfa-main-pdf-tutorial-course-hero {
        padding: 35px 0;
    }

    .kfa-main-pdf-tutorial-hero-row {
        flex-wrap: nowrap;
        align-items: center;
    }

    .kfa-main-pdf-tutorial-hero-logo-col {
        width: 100px;
        flex-shrink: 0;
    }

    .kfa-main-pdf-tutorial-course-icon {
        width: 80px;
        height: 80px;
        margin: 0;
    }

    .kfa-main-pdf-tutorial-hero-content-col {
        padding-left: 15px;
    }

    .kfa-main-pdf-tutorial-course-title {
        font-size: 22px;
        line-height: 1.25;
    }

    .kfa-main-pdf-tutorial-course-subtitle {
        font-size: 14px;
        margin: 10px 0;
    }

    .kfa-main-pdf-tutorial-course-stats {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .kfa-main-pdf-tutorial-stat-item {
        font-size: 13px;
    }

    /* Top Nav */
    .kfa-main-pdf-tutorial-breadcrumb-bar {
        display: none;
    }

    /* Page Wrapper - stack vertically */
    .kfa-main-pdf-tutorial-page-wrapper {
        flex-direction: column;
        margin: 0 auto;
        padding: 0;
        gap: 0;
    }

    /* Left Sidebar - horizontal scroll strip */
    .kfa-main-pdf-tutorial-left-sidebar {
        width: 100%;
        min-width: 100%;
        position: relative;
        top: auto;
        height: auto;
        max-height: none;
        border-right: none;
        border-bottom: 1px solid #e2e6f0;
        overflow: hidden;
        margin: 10px;
    }

    .kfa-main-pdf-tutorial-sidebar-bottom-cta {
        display: none;
    }

    .kfa-main-pdf-tutorial-course-list {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 8px;
        padding: 12px 15px;
        scrollbar-width: none;
        margin-bottom: 0;
    }

    .kfa-main-pdf-tutorial-course-list::-webkit-scrollbar {
        display: none;
    }

    .kfa-main-pdf-tutorial-course-item {
        flex: 0 0 auto;
        min-width: 190px;
        border-radius: 8px;
        border: 1px solid #e8eaf5;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        border-bottom: 1px solid #e8eaf5;
    }

    /* Center Content */
    .kfa-main-pdf-tutorial-center-content {
        padding: 18px 15px 30px;
        width: 100%;
    }

    .kfa-main-pdf-tutorial-page-title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .kfa-main-pdf-tutorial-page-title {
        font-size: 17px;
    }

    .kfa-main-pdf-tutorial-dl-btn {
        width: 100%;
        justify-content: center;
    }

    .kfa-main-pdf-tutorial-pdf-iframe {
        height: 560px;
    }

    .kfa-main-pdf-tutorial-chapter-nav-row {
        flex-direction: column;
        gap: 10px;
    }

    .kfa-main-pdf-tutorial-chapter-nav-btn {
        width: 100%;
        justify-content: center;
    }

    /* Right Sidebar */
    .kfa-main-pdf-tutorial-right-sidebar {
        width: 100%;
        min-width: 100%;
        position: relative;
        top: auto;
        padding: 0 15px 30px;
        height: auto;
        overflow-y: visible;
    }

}

/* ============================================================
   480px - MOBILE
============================================================ */
@media (max-width: 480px) {

    /* Hero */
    .kfa-main-pdf-tutorial-course-hero {
        padding: 25px 0;
    }

    .kfa-main-pdf-tutorial-hero-row {
        flex-direction: column;
        text-align: center;
    }

    .kfa-main-pdf-tutorial-hero-logo-col {
        width: 100%;
        margin-bottom: 14px;
    }

    .kfa-main-pdf-tutorial-course-icon {
        width: 80px;
        height: 80px;
        margin: 0 auto;
    }

    .kfa-main-pdf-tutorial-hero-content-col {
        padding-left: 0;
    }

    .kfa-main-pdf-tutorial-hero-heading-wrap {
        justify-content: center;
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .kfa-main-pdf-tutorial-course-title {
        font-size: 20px;
        text-align: center;
    }

    .kfa-main-pdf-tutorial-course-subtitle {
        font-size: 13px;
        text-align: center;
    }

    .kfa-main-pdf-tutorial-course-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .kfa-main-pdf-tutorial-stat-item {
        justify-content: center;
        font-size: 12px;
    }

    .kfa-main-pdf-tutorial-stat-item i {
        font-size: 15px;
    }

    .kfa-main-pdf-tutorial-stat-item:nth-child(2) {
        margin-left: -40px;
    }

    /* Top Nav */
    .kfa-main-pdf-tutorial-top-nav {
        height: auto;
        padding: 10px 14px;
    }

    .kfa-main-pdf-tutorial-top-nav-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }

    /* Sidebar */
    .kfa-main-pdf-tutorial-course-item {
        min-width: 170px;
    }

    /* Center */
    /* .kfa-main-pdf-tutorial-center-content {
        padding: 14px 12px 24px;
    } */

    .kfa-main-pdf-tutorial-page-title {
        font-size: 15px;
    }

    .kfa-main-pdf-tutorial-pdf-iframe {
        height: 450px;
    }

    .kfa-main-pdf-tutorial-chapter-nav-btn {
        padding: 11px 20px;
        font-size: 13px;
    }

    /* Right Sidebar */
    .kfa-main-pdf-tutorial-right-sidebar {
        padding: 0 12px 24px;
    }

}

/* ============================================================
   375px - SMALL MOBILE
============================================================ */
@media (max-width: 375px) {

    .kfa-main-pdf-tutorial-course-title {
        font-size: 18px;
    }

    .kfa-main-pdf-tutorial-course-subtitle {
        font-size: 12px;
    }

    .kfa-main-pdf-tutorial-stat-item {
        font-size: 11px;
    }

    .kfa-main-pdf-tutorial-stat-item i {
        font-size: 13px;
    }

    .kfa-main-pdf-tutorial-course-item {
        min-width: 155px;
        padding: 8px 12px;
    }

    .kfa-main-pdf-tutorial-course-item .kfa-main-pdf-tutorial-label {
        font-size: 12px;
    }

    .kfa-main-pdf-tutorial-page-title {
        font-size: 14px;
    }

    .kfa-main-pdf-tutorial-pdf-iframe {
        height: 400px;
    }

    .kfa-main-pdf-tutorial-dl-btn {
        font-size: 12px;
        padding: 8px 14px;
    }

    .kfa-main-pdf-tutorial-chapter-nav-btn {
        font-size: 12px;
        padding: 10px 16px;
    }

    .kfa-main-pdf-tutorial-right-sidebar {
        padding: 0 10px 20px;
    }

}