/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Roboto:wght@400;700&family=Fira+Code:wght@500&display=swap');

:root {
    /* Main Color Scheme */
    --color-primary: #2563EB;
    --color-primary-dark: #0B2453;
    --color-dark: #0F172A;
    --color-light: #E5E7EB;
    --color-light-alpha: rgba(229, 231, 235, 0.5);
    

    /* Additional colors for accents and badges */
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;
    --color-purple: #8B5CF6;
    --color-indigo: #6366F1;
    --color-orange: #F97316;
    --color-yellow: #FCD34D;
    --color-red: #DC2626;
    --color-blue: #1D4ED8;
    --color-green: #10B981;
    --color-gray: #383B40;
    
    /* Font families */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --font-code: 'Fira Code', monospace;
}

/* ===== Base Styles ===== */

body {
    font-family: var(--font-body);
    color: var(--color-light);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 76px;
    background: var(--color-dark);
    background-image:
        /* Outer corners */
        radial-gradient(ellipse 50vw 100vh at 125% 0%, var(--color-primary) -30%, transparent 100%),
        radial-gradient(ellipse 50vw 100vh at -25% 0%, var(--color-primary) -30%, transparent 100%),
        /* radial-gradient(ellipse 50vw 100vh at 125% 50%, var(--color-primary) -30%, transparent 130%),
        radial-gradient(ellipse 50vw 100vh at -25% 50%, var(--color-primary) -30%, transparent 130%), */

        /* Vertical flow lines */
        radial-gradient(circle 40vw at 50% 10%, var(--color-primary) -50%, transparent 30%),
        /* radial-gradient(circle 40vw at 50% 30%, var(--color-primary) -50%, transparent 30%), */
        radial-gradient(circle 40vw at 50% 50%, var(--color-primary) -50%, transparent 30%),
        /* radial-gradient(circle 40vw at 50% 70%, var(--color-primary) -50%, transparent 30%), */
        radial-gradient(circle 40vw at 50% 90%, var(--color-primary) -50%, transparent 30%);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1rem;
}

h1 font[color="Black"],
h1 font[color="black"] {
  color: var(--color-light) !important;
}

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

a:hover {
    color: var(--color-blue);
}

.btn-primary {
    background: linear-gradient(to right, var(--color-primary) 0%, #06B6D4 100%);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: linear-gradient(to right, var(--color-primary) 50%, #06B6D4 100%);
    border-color: var(--color-blue);
    transition: 0.5s;
}

.text-primary {
    color: var(--color-primary) !important;
}

.text-gradient {
    background: linear-gradient(90deg, var(--color-primary) 50%, #06B6D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* ===== Navigation ===== */

#mainNav {
    background-color: var(--color-dark);
    padding: 15px 0;
    transition: all 0.3s ease;
    background-image:
    radial-gradient(ellipse 45vw 80vh at -10% 70%, var(--color-primary) -30%, transparent 70%),
    radial-gradient(ellipse 45vw 80vh at 110% 30%, var(--color-primary) -30%, transparent 70%);
}

#mainNav .navbar-brand {
    color: var(--color-light);
    font-size: 1.5rem;
}

#mainNav .nav-link {
    color: var(--color-light);
    margin: 0 10px;
    font-family: var(--font-heading);
    font-weight: 500;
    transition: all 0.3s ease;
}

#mainNav .nav-link:hover,
#mainNav .nav-link.active {
    color: var(--color-primary);
}

.nav-item.dropdown:hover .dropdown-menu {
    display: block;
    margin-top: 0; 
    background-color: var(--color-dark); 
    color: var(--color-light)
}

.dropdown-toggle::after {
    margin-left: 0.3em;
}

.dropdown-menu {
    background-color: var(--color-gray);          
    border-radius: 8px;                 
    border: 1px solid var(--color-primary-dark);          
    box-shadow: 0 4px 12px rgba(11, 36, 83, 0.3); 
    padding: 0.5rem 0;
}

.dropdown-menu .dropdown-item {
    color: var(--color-light);
    padding: 0.5rem 1rem;
}

.dropdown-menu .dropdown-item:hover,
.dropdown-menu .dropdown-item:focus {
    background-color: rgba(37, 99, 235, 0.2); /* Semi-transparent blue hover */
    color: var(--color-light);
}

.search-icon-wrapper {
    position: relative;
}

.search-popover {
    position: absolute;
    top: 120%; /* adjust as needed */
    right: 0;
    background: var(--color-dark);
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 999;
    width: 370px; /* optional fixed width */
    border: 1px solid var(--color-blue);
}

.search-icon-wrapper:hover .search-popover {
    opacity: 1;
    visibility: visible;
}

/* ===== Hero Section ===== */

.hero-section {
    padding: 80px 0 0px;
    position: relative;
    overflow: hidden;
}

/* .hero-section:before {
    content: "";
    background-image: url('../img/herologo.svg');
    position: absolute;
    top: 10vh;
    left: 85vw;
    right: 0vw;
    bottom: 40vh;
    background-repeat: no-repeat;
    background-size: cover;
} */

.search-form {
    max-width: 500px;
    margin: 0 auto;
}

.category-pill {
    padding: 8px 18px;
    border: 1px solid var(--color-light); 
    border-radius: 8px;
    color: var(--color-light);
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.category-pill:hover {
    background-color: var(--color-light);
    color: var(--color-dark); 
}

.categories-wrapper {
    padding: 20px;
}

/* ===== Featured Courses ===== */
.course-card {
    background-color:var(--color-primary-dark);
    border: 1px solid var(--color-light-alpha);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    padding: 15px;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-card .card-img-top {
    background: var(--color-light);
    border-radius: 8px;
    border: 1px solid var(--color-light-alpha);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.course-card .card-img-top img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-card .card-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.course-card .card-title {
    font-weight: bold;
    font-size: 18px;
    color: var(--color-light);
    line-height: 1.4;
}

.course-card .card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-badge {
    color: var(--color-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid var(--color-light);
    text-align: center;
}

.tag-badge:hover {
    background-color: var(--color-light);
    color: var(--color-dark); 
}

.course-card .btn-explore {
    margin-top: auto;
    color: var(--color-light);
    font-weight: 500;
    font-size: 0.9rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ===== Popular Tags ===== */
.tag-icon-container {
    width: 118px;
    height: 128px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin: 0 auto;
    transition: all 0.3s ease;
    box-shadow: rgba(255, 255, 255, 0.12) 0px 1px 3px, rgba(255, 255, 255, 0.24) 0px 1px 2px;
    flex-direction: column;
    gap: 0.5rem;                 /* Space between icon and tag */

}

.tag-icon-container i {
    font-size: 48px;
}

.tag-icon-container:hover {
    transform: translateY(-5px);
    box-shadow: rgba(255, 255, 255, 0.12) 0px 1px 3px, rgba(255, 255, 255, 0.24) 0px 1px 2px;
}

.tag-name {
    font-size: 1rem;
    color: var(--color-light);
    display: block;
}

/* ===== Development Tools ===== */

/* .dev-tools .tool-list li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.tool-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin-right: 15px;
}

.text-orange { color: var(--color-orange); }
.text-blue { color: var(--color-blue); }
.text-yellow { color: var(--color-yellow); }
.text-green { color: var(--color-green); }
.text-red { color: var(--color-red); }
.text-purple { color: var(--color-purple); }
.text-indigo { color: var(--color-indigo); }

.bg-orange-100 { background-color: rgba(249, 115, 22, 0.1); }
.bg-blue-100 { background-color: rgba(37, 99, 235, 0.1); }
.bg-yellow-100 { background-color: rgba(252, 211, 77, 0.1); }
.bg-green-100 { background-color: rgba(16, 185, 129, 0.1); }
.bg-red-100 { background-color: rgba(220, 38, 38, 0.1); }
.bg-purple-100 { background-color: rgba(139, 92, 246, 0.1); }
.bg-indigo-100 { background-color: rgba(99, 102, 241, 0.1); }
.bg-gray-100 { background-color: rgba(156, 163, 175, 0.1); }

.pagination .page-item.active .page-link {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.pagination .page-link {
    color: var(--color-primary);
}

.pagination .page-link:hover {
    background-color: rgba(37, 99, 235, 0.1);
} */

/* ===== Newsletter Section ===== */
.newsletter {
    position: relative;
    overflow: hidden;
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.intensity-watermark {
    position: absolute;
    bottom: -20px;
    left: 0;
    right: 0;
    z-index: 0;
    text-align: center;
}

.intensity-image {
    max-width: 100%;
    height: auto;
    opacity: 1;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-dark);
    color: var(--color-light-alpha);
    border-top: 1px solid var(--color-light-alpha) ;
    /* background-image:
    radial-gradient(ellipse 45vw 80vh at -10% 50%, #2563EB -30%, transparent 70%),
    radial-gradient(ellipse 45vw 80vh at 110% 50%, #2563EB -30%, transparent 70%); */
  }

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--color-light-alpha);
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.footer-contact {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-contact li {
    margin-bottom: 15px;
}

.social-icons {
    display: flex;
    gap: 10px;
}

.social-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-light);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--color-primary);
    color: var(--color-light);
}

/* ===== 404 Page ===== */
.error-page {
    min-height: calc(100vh - 76px);
    position: relative;
    overflow: hidden;
}

.error-title {
    font-size: 10rem;
    letter-spacing: -5px;
    margin-bottom: 0;
    line-height: 1;
}

/* ===== Contact Page ===== */
.contact-section {
    padding: 120px 0 80px;
    min-height: calc(100vh - 76px);
}

.contact-form-wrapper {
    background-color: rgba(229, 231, 235, 0.05);
    backdrop-filter: blur(5px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 20px;
    margin-right: 20px;
}

.form-label {
    color: var(--color-light);
    font-weight: 500;
}

.form-control {
    background-color: rgba(0, 0, 0, 0.1);
    border: 1px solid var(--color-light-alpha);
    color: var(--color-light);
    padding: 12px 15px;
}

.form-control:focus {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--color-light);
    box-shadow: none;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.input-group-text {
    background-color: rgba(255, 255, 255, 0.15);
    border: none;
    color: var(--color-primary);
}

.form-check-input {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.form-check-label {
    color: rgba(255, 255, 255, 0.8);
}

/* ===== Category Page ===== */
.category-header {
    background-image: url('../img/Category_banner.jpg'); 
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    padding: 120px 0 90px;
    position: relative;
}

.category-filter {
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-light-alpha);
    padding: 1rem 2rem;
    margin: 2rem auto;
    border-radius: 8px;
    width: 85%;
    box-sizing: border-box;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: space-between;
}

.category-tab {
    color: var(--color-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid var(--color-light);
    text-align: center;
}

.category-tab:hover, 
.category-tab.active {
    background-color: var(--color-light);
    color: var(--color-dark); }

.section-title {
    color: var(--color-light);
    font-weight: 700;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.section-title:after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--color-primary);
}

.card-tags {
    display: flex;
    gap: 5px;
}

.btn-explore {
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-explore:hover {
    color: var(--color-primary);
}

.btn-view-all {
    display: inline-block;
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
    padding: 10px 25px;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-view-all:hover {
    background-color: var(--color-primary);
    color: var(--color-light);
}

/* ===== Post Page ===== */
.post-header {
    padding: 120px 0 60px;
    position: relative;
}

.post-content{
    background-image: 
    radial-gradient(ellipse 50vw 100vh  at 125% 100%, var(--color-primary) -30%, transparent 130%),
    radial-gradient(ellipse 50vw 100vh  at -25% 100%, var(--color-primary) -30%, transparent 130%);
}

.post-sidebar {
    background-color: var(--color-dark);
    border-radius: 10px;
    border: 1px solid var(--color-light-alpha);
    padding: 25px;
    position: sticky;
    top: 100px;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-item {
    margin-bottom: 10px;
}

.sidebar-link {
    color: var(--color-light);
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.sidebar-link:hover,
.sidebar-link.active {
    background-color: var(--color-gray);
    color: var(--color-light);
}

.category-sidebar,
.tags-sidebar,
.share-sidebar {
    background-color: var(--color-dark);
    border-radius: 10px;
    padding: 20px;
    border: 1px solid var(--color-light-alpha);
}

/* post-article */
.post-article {
    font-size: 1.05rem;
    line-height: 1.7;
}

.post-article img {
    display: block;
    max-width: 100%;
    margin: 1.5rem auto; /* centers image with spacing */
    padding: 1rem;
    background-color: var(--color-dark); /* subtle bg box */
    border-radius: 8px;
    border: 1px solid var(--color-light-alpha) ;
    box-shadow: rgba(255, 255, 255, 0.12) 0px 1px 3px, rgba(255, 255, 255, 0.24) 0px 1px 2px;

}

.post-pagination {
    padding: 20px 0;
}

/* ===== Media Queries ===== */
@media (max-width: 991.98px) {
    .navbar-nav {
        padding: 15px 0;
    }
    
    #mainNav .nav-link {
        margin: 5px 0;
    }
    
    .search-form {
        width: 100%;
    }
    
    .hero-section {
        padding: 100px 0 60px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .post-sidebar {
        position: static;
        margin-bottom: 30px;
    }
}

@media (max-width: 767.98px) {
    body {
        padding-top: 66px;
        background-image:
        radial-gradient(ellipse 50vw 100vh at 125% 0%, var(--bg-radial-color) var(--bg-radial-stop), transparent var(--bg-radial-fade)),
        radial-gradient(circle 40vw at 50% 50%, var(--bg-radial-color) var(--bg-circle-stop), transparent var(--bg-circle-fade));
    }
    
    .hero-section {
        padding: 80px 0 40px;
    }
    
    .error-title {
        font-size: 6rem;
    }
    
    .footer-bottom {
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
        margin-bottom: 15px;
    }
    
    .intensity-watermark .opacity-10 {
        font-size: 4rem;
    }
    
    .contact-form-wrapper {
        padding: 25px;
    }
}

@media (max-width: 575.98px) {
    .category-pill {
        font-size: 0.8rem;
        padding: 5px 10px;
    }
    
    .tag-icon-container {
        width: 50px;
        height: 50px;
    }
    
    .tag-icon-container i {
        font-size: 20px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .social-icon {
        width: 32px;
        height: 32px;
    }
}

@media (min-width: 992px) {
    .custom-sidebar {
        width: 20%;
        flex: 0 0 20%;
        max-width: 20%;
    }

    .custom-content {
        width: 60%;
        flex: 0 0 60%;
        max-width: 60%;
    }
}