:root {
    --color-primary-dark: #1A2C3D;
    --color-accent-green: #4CAF50;
    --color-light-gray: #F3F4F6;
    --color-white: #FFFFFF;
    --color-secondary-blue: #3366CC;
    --color-text-light: #6B7280;
    --color-text-dark-gray: #4A5568;
    font-size: 16px;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--color-primary-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1450px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

a {
    color: var(--color-secondary-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-green);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5625rem;
    border-radius: 0.3125rem;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-accent-green);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: #388E3C;
    transform: translateY(-0.125rem);
}

.btn-secondary {
    background-color: var(--color-secondary-blue);
    color: var(--color-white);
    font-size: 0.9em;
    padding: 0.5rem 0.9375rem;
}

.btn-secondary:hover {
    background-color: #2854A3;
    transform: translateY(-0.0625rem);
}





/* =================================================================
=========== HEADER =========================================== */
.main-header {
    background-color: var(--color-white);
    padding: 0.9375rem 0;
    border-bottom: 0.0625rem solid var(--color-light-gray);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}


.logo {
    width: 250px;
}



.main-nav ul {
    list-style: none;
    display: flex;
}

.main-nav li {
    margin-left: 1.875rem;
}

.main-nav a {
    font-weight: 600;
    font-size: 1.05em;
    color: var(--color-primary-dark);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-secondary-blue);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 1.5625rem;
    /* 25px */
    height: 0.1875rem;
    /* 3px */
    background-color: var(--color-primary-dark);
    margin: 0.3125rem 0;
    /* 5px */
    transition: all 0.3s ease;
}



/* ======================================================================
========== CATEGORIES SPECIFIC =================================== */
.categories-page-main {
    padding: 2.5rem 0;
    /* 40px */
    background-color: var(--color-light-gray);
}

.main-content-wrapper {
    display: flex;
    gap: 1.875rem;
    /* 30px */
    align-items: flex-start;
}



/*  ==============================================================
==================== FILTER SIDEBAR =================================== */
.filter-sidebar {
    flex: 0 0 17.5rem;
    background-color: var(--color-white);
    padding: 1.5625rem;
    border-radius: 0.5rem;
    box-shadow: 0 0.25rem 0.9375rem rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 5.625rem;
    max-height: calc(100vh - 6.875rem);
    overflow-y: auto;
}

.filter-sidebar h3 {
    font-size: 1.6em;
    color: var(--color-primary-dark);
    margin-bottom: 1.5625rem;
}

.filter-group {
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 0.0625rem solid var(--color-light-gray);
}

.filter-group:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.filter-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.625rem;
    color: var(--color-primary-dark);
}

.filter-group h4 {
    font-size: 1.1em;
    margin-bottom: 0.625rem;
    color: var(--color-primary-dark);
}



.filter-group select,
.filter-group input[type="text"],
.filter-group input[type="number"] {
    width: 100%;
    padding: 0.625rem 0.9375rem;
    border: 0.0625rem solid #BBBBBB;
    border-radius: 0.3125rem;
    font-size: 1em;
    color: var(--color-primary-dark);
    background-color: var(--color-white);
    box-shadow: 0 0.0625rem 0.1875rem rgba(0, 0, 0, 0.05);
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="%231A2C3D" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-chevron-down"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    background-size: 1.125rem;
}


.filter-group select:focus,
.filter-group input[type="text"]:focus,
.filter-group input[type="number"]:focus {
    outline: none;
    border-color: var(--color-secondary-blue);
    box-shadow: 0 0 0 0.1875rem rgba(51, 102, 204, 0.2);
}

.checkbox-group label,
.radio-group label {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.95em;
    color: var(--color-text-light);
    cursor: pointer;
}


.checkbox-group input[type="checkbox"],
.radio-group input[type="radio"] {
    margin-right: 0.625rem;
}

#apply-filters-btn,
#clear-filters-btn {
    width: 100%;
    margin-top: 0.9375rem;
}


#clear-filters-btn {
    background-color: var(--color-text-light);
    margin-top: 0.625rem;
}

#clear-filters-btn:hover {
    background-color: #525864;
}




/* =====================================================================
========================== COURSES DISPLAY AREAD =============================== */
.course-display-area {
    flex: 1;
    background-color: var(--color-white);
    padding: 1.5625rem;
    border-radius: 0.5rem;
    box-shadow: 0 0.25rem 0.9375rem rgba(0, 0, 0, 0.08);
}

.course-display-area .section-title {
    text-align: left;
    margin-bottom: 1.875rem;
    margin-left: 0;
    margin-right: 0;
}

.course-display-area .section-title::after {
    margin-left: 0;
}





/* ======================================================================
====================== COURSES GRID ====================================== */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(18.75rem, 1fr));
    gap: 1.875rem;
    margin-top: 0;
}


.course-card {
    background-color: var(--color-white);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 0.25rem 0.9375rem rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}



.course-card:hover {
    transform: translateY(-0.3125rem);
    box-shadow: 0 0.375rem 1.25rem rgba(0, 0, 0, 0.12);
}


.course-card img {
    width: 100%;
    height: 11.25rem;
    object-fit: cover;
    border-bottom: 0.0625rem solid var(--color-light-gray);
}



.card-content {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}


.course-card h3 {
    font-size: 1.3em;
    margin-bottom: 0.625rem;
    color: var(--color-primary-dark);
}


.course-card .platform-name {
    font-size: 0.9em;
    color: var(--color-secondary-blue);
    font-weight: 600;
    margin-bottom: 0.5rem;
}


.course-info {
    font-size: 0.85em;
    color: var(--color-text-dark-gray);
    font-weight: 500;
    margin-bottom: 0.3125rem;
}


.course-card .short-desc {
    font-size: 0.95em;
    color: var(--color-text-light);
    margin-bottom: 0.9375rem;
    flex-grow: 1;
}

.course-card .rating {
    color: #FFC107;
    font-size: 1.1em;
    margin-bottom: 0.9375rem;
}


.no-results-message {
    text-align: center;
    padding: 3.125rem 1.25rem;
    font-size: 1.2em;
    color: var(--color-text-light);
}






/* ===========================================================================================================
======================== MOBILE FILTER TOGGL3 BUTTONS ======================================================= */
.open-filter-sidebar-btn,
.close-filter-sidebar-btn {
    display: none;
    background-color: var(--color-secondary-blue);
    color: var(--color-white);
    border: none;
    padding: 0.625rem 0.9375rem;
    border-radius: 0.3125rem;
    cursor: pointer;
    font-size: 1em;
    margin-bottom: 1.25rem;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}


.open-filter-sidebar-btn i,
.close-filter-sidebar-btn i {
    font-size: 1.1em;
}

.close-filter-sidebar-btn {
    position: absolute;
    top: 0.9375rem;
    right: 0.9375rem;
    background: none;
    color: var(--color-primary-dark);
    font-size: 1.5em;
    padding: 0.3125rem;
}



.close-filter-sidebar-btn:hover {
    color: var(--color-accent-green);
}







/* =======================================================================================
============================================================
============ FOOTER ========================================================
============================================================== */
.footer-section {
    background: linear-gradient(to right, #1a202c, #122c46);
    /* Dark blue-grey to dark red-brown gradient */
    color: #d1d5db;
    /* text-gray-300 */
    padding-top: 3rem;
    /* py-12 */
    padding-bottom: 3rem;
    border-radius: 100px 0 0 0;
}

.footer-container {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
    text-align: left;
}


.footer-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
    align-items: top;
}

@media (min-width: 768px) {

    /* md breakpoint */
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        /* md:grid-cols-2 */
    }
}

@media (min-width: 1024px) {

    /* lg breakpoint */
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
        /* lg:grid-cols-4 */
    }
}

/* Column styles */
.footer-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 270px;
    text-align: left;
    max-width: 400px;
}


@media (min-width: 768px) {

    /* md breakpoint */
    .footer-column {
        align-items: flex-start;
        /* md:items-start */
        text-align: left;
        /* md:text-left */
    }
}

.footer-logo {
    width: 200px;
}


.footer-description {
    font-size: 1rem;
    /* text-sm */
    margin-bottom: 1rem;
    /* mb-4 */
    max-width: 350px;
    /* max-w-xs */
}



/* Links Section */
.links-list {
    list-style: none;
    padding: 0;
    margin: 0;
    line-height: 1.5;
    /* space-y-2 (approx) */
}

.links-list li {
    margin-bottom: 0.5rem;
    /* Adjust as needed for spacing */
}

.links-list a {
    font-size: 1rem;
    /* text-sm */
    color: #d1d5db;
    /* default text color */
    transition: color 0.2s ease-in-out;
    /* transition duration-200 */
}

.links-list a:hover {
    color: #60a5fa;
    /* hover:text-blue-400 */
}


.android-wrapper {
    display: flex;
    flex-direction: column;

}

.android-wrapper a {
    margin: 5px 0;
    font-size: 20px;
    color: #fff;
    transition: .3s ease-in-out;
}

.android-wrapper a:hover {
    color: #1d4ed8;
}

.android {
    width: 200px;
    height: fit-content;
}

/* Social Media Icons */
.social-icons-container {
    display: flex;
    gap: 1rem;
    /* space-x-4 */
}

.social-icon {
    width: 2.5rem;
    /* w-10 */
    height: 2.5rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #ffffff;
    /* bg-gray-700 */
    color: #1a202c;
    /* text-white */
    border-radius: 9999px;
    /* rounded-full */
    transition: all 0.3s ease-in-out;
    /* transition duration-300 ease-in-out */
}

.social-icon:hover {
    transform: scale(1.1);
    /* hover:scale-110 */
}

.social-icon.facebook:hover {
    background-color: #2563eb;
    /* hover:bg-blue-600 */
}

.social-icon.whatsapp:hover {
    background-color: #16a34a;
    /* hover:bg-green-600 */
}

.social-icon.twitter:hover {
    background-color: #60a5fa;
    /* hover:bg-blue-400 */
}

.social-icon.pinterest:hover {
    background-color: #dc2626;
    /* hover:bg-red-600 */
}

.footer-text {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

footer h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 1rem;
    border-bottom: 2px solid #3b82f6;
    padding-bottom: 0.25rem;
}

.footer-text p {
    font-size: 15px;
    color: #838e9e;
    text-align: center;
    margin: 5px 0;
}

.quick-links {
    padding: 20px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.quick-links a {
    font-size: 20px;
    font-weight: 600;
    color: #7e7e80;
    width: 200px;
    transition: .3s ease-in-out;
    border-left: 1px solid #7e7e80;
    border-right: 1px solid #7e7e80;
    text-align: center;
}

.quick-links a:hover {
    color: #1d4ed8;
}


/* Copyright Section */
.copyright-section {
    border-top: 1px solid #4b5563;
    /* border-t border-gray-700 */
    margin-top: 1rem;
    /* mt-12 */
    padding-top: 2rem;
    /* pt-8 */
    text-align: center;
    color: #7e7e80;
    /* text-gray-500 */
    font-size: 1rem;
    /* text-sm */
}






/* ========================================================
============ SMALL SCREENS ============================ */
@media (max-width: 768px) {
    .main-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: var(--color-white);
        position: absolute;
        top: 4.375rem;
        /* 70px */
        left: 0;
        padding-bottom: 0.625rem;
        /* 10px */
        box-shadow: 0 0.3125rem 0.625rem rgba(0, 0, 0, 0.1);
        /* 0 5px 10px */
    }

    .main-nav.active {
        display: flex;
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .main-nav li {
        margin: 0;
        border-bottom: 0.0625rem solid var(--color-light-gray);
        /* 1px */
    }

    .main-nav a {
        display: block;
        padding: 0.9375rem 1.25rem;
        /* 15px 20px */
        text-align: center;
        width: 100%;
    }

    .nav-toggle {
        display: block;
    }

    /*=================== Categories Page Mobile Adjustments ===================================*/
    .main-content-wrapper {
        flex-direction: column;
        gap: 1.25rem;
    }

    .filter-sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        max-height: 100vh;
        z-index: 1001;
        transition: left 0.3s ease-in-out;
        box-shadow: 0.3125rem 0 0.9375rem rgba(0, 0, 0, 0.2);
        padding-top: 3.75rem;
    }

    .filter-sidebar.active {
        left: 0;
    }

    .open-filter-sidebar-btn {
        display: flex;
    }

    .close-filter-sidebar-btn {
        display: block;
    }

    .course-display-area .section-title {
        font-size: 1.6em;
        text-align: center;
    }

    .course-display-area .section-title::after {
        margin: 0.625rem auto 0;
    }

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

    .main-footer .footer-links a {
        display: block;
        margin: 0.625rem 0;
    }
}


@media(max-width: 1000px) {
    .logo {
        width: 180px;
    }
}




/* =============================== 
HUMBURGER ANIMATION ============================== */
.nav-toggle.open span:nth-child(1) {
    transform: rotate(-45deg) translate(-0.3125rem, 0.375rem);

}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: rotate(45deg) translate(-0.3125rem, -0.375rem);

}