:root{
            --navy: #0F172A; /* Deeper navy */
            --accent-gold: #FFD700; /* Bright gold */
            --light-sky: #F0F9FF; /* Very light blue */
            --dark-text: #1F2937; /* Dark gray for text on light backgrounds */
            --mid-gray-text: #4B5563; /* Medium gray for muted text */
            --gradient-dark-blue: linear-gradient(180deg, #102A43 0%, #243B53 100%);
            --gradient-glass-dark: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
            --gradient-glass-light: linear-gradient(180deg, rgba(255,255,255,0.9), rgba(255,255,255,0.8));
            --course-card-bg: #FFFFFF; /* White background for course cards */
            --course-card-border: #E0E0E0; /* Light border for course cards */
            --course-card-shadow: rgba(0,0,0,0.08); /* Subtle shadow */
            --course-card-hover-shadow: rgba(0,0,0,0.15); /* More prominent shadow on hover */
        }
        body{
            font-family: 'Lato', sans-serif;
            background: var(--gradient-dark-blue);
            color: #E2E8F0; /* Light text for dark backgrounds */
            -webkit-font-smoothing:antialiased;
            overflow-x: hidden; /* Prevent horizontal scroll from AOS or overflow */
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: 'Poppins', sans-serif;
            color: #FFFFFF; /* Default heading color on dark background */
        }
        .section-light h2, .section-light h3, .section-light h4, .section-light h5 {
            color: var(--navy); /* Heading color on light background */
        }
        p {
            color: #CBD5E0; /* Default paragraph color on dark background */
        }
        .section-light p {
            color: var(--mid-gray-text); /* Paragraph color on light background */
        }
        a { text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: var(--accent-gold); }

        /* Header */
        .site-header{
            background: rgba(244, 244, 244, 0.7); /* Slightly transparent dark blue */
            backdrop-filter: blur(8px);
            border-bottom: 1px solid rgba(255,255,255,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }
        .logo-wrap img{ height:68px; filter: drop-shadow(0 0 5px var(--accent-white)); }
        .site-header .nav-link {
            color: #0A192F;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        .site-header .nav-link:hover {
            background-color: #0A192F;
            color: var(--accent-navy);
        }
        .btn-outline-light {
            border-color: #0A192F;
            color: #0A192F;
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        .btn-outline-light:hover {
            background-color: var(--accent-gold);
            color: var(--navy);
            border-color: var(--accent-gold);
        }

        /* HERO */
        .hero{
            padding: 100px 0;
            position: relative;
            overflow: hidden;
            text-align: left;
            background: url('http://googleusercontent.com/file_content/0') no-repeat center center/cover;
            background-blend-mode: multiply; /* Blend mode for better color control */
            background-color: rgba(16, 42, 67, 0.6); /* Dark overlay */
            filter: brightness(0.9) grayscale(0.1); /* Adjusted brightness and less grayscale */
            position: relative;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to right, rgba(16, 42, 67, 0.9) 0%, rgba(16, 42, 67, 0.5) 50%, rgba(16, 42, 67, 0.1) 100%); /* Adjusted gradient transparency */
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-left h1{
            font-size: clamp(2.5rem, 5vw, 4rem); /* Responsive font size */
            line-height: 1.1;
            font-weight: 700;
            color: #fff;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.4);
        }
        .hero-left p {
            color: #B0D9EE;
            font-size: 1.15rem;
            margin-top:1rem;
            max-width:720px;
        }
        .btn-cta {
            background: linear-gradient(90deg, #3B82F6, #9F7AEA); /* Blue to Purple gradient */
            border: none;
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 999px;
            font-weight:600;
            box-shadow: 0 8px 30px rgba(59,130,246,0.25);
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .btn-cta:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 40px rgba(59,130,246,0.35);
        }
        .hero .btn-outline-light {
             background: transparent;
             border: 2px solid #E2E8F0;
             color: #E2E8F0;
             font-weight: 600;
             padding: 0.75rem 2rem;
             border-radius: 999px;
             transition: all 0.3s ease;
        }
        .hero .btn-outline-light:hover {
            background-color: #E2E8F0;
            color: var(--navy);
            transform: translateY(-3px) scale(1.02);
        }

        /* floating icons */
        .floating {
            position: absolute;
            font-size: clamp(2rem, 4vw, 3rem); /* Responsive icon size */
            opacity: 0.08;
            filter: drop-shadow(0 6px 20px rgba(0,0,0,0.5));
            animation: bob 6s ease-in-out infinite;
            color: #fff;
        }
        .floating.slow{ animation-duration: 9s; }
        @keyframes bob { 0%,100%{ transform: translateY(0) rotate(0deg);} 50%{ transform: translateY(-18px) rotate(5deg);} }

        /* glass cards */
        .glass {
            background: var(--gradient-glass-dark);
            border: 1px solid rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            border-radius: 14px;
            padding: 1.5rem;
            box-shadow: 0 8px 24px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
        }
        .glass:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.4);
        }

        /* Course Cards - NEW BOLD DESIGN */
        .course-card {
            background-color: var(--course-card-bg);
            border: 1px solid var(--course-card-border);
            border-radius: 12px;
            box-shadow: 0 6px 20px var(--course-card-shadow);
            padding: 25px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%; /* Ensure cards in a row have same height */
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .course-card:hover {
            transform: translateY(-8px) scale(1.01);
            box-shadow: 0 12px 30px var(--course-card-hover-shadow);
        }
        .course-card .card-icon {
            font-size: 3.5rem; /* Larger icon */
            color: var(--accent-gold);
            margin-bottom: 20px;
        }
        .course-card .card-title {
            font-size: 1.6rem;
            font-weight: 600;
            color: var(--navy);
            margin-bottom: 10px;
        }
        .course-card .card-subtitle {
            font-size: 0.95rem;
            color: var(--mid-gray-text);
            margin-bottom: 15px;
        }
        .course-card .card-description {
            font-size: 0.9rem;
            color: var(--dark-text);
            flex-grow: 1; /* Allows description to take available space */
            margin-bottom: 20px;
        }
        .course-card .card-duration {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--navy);
            margin-top: 10px;
            margin-bottom: 15px;
        }
        .course-card .course-list {
            text-align: left;
            font-size: 0.85rem;
            color: var(--dark-text);
            margin-top: 15px;
            padding-left: 0; /* Remove default padding for ul */
        }
        .course-card .course-list li {
            list-style: none; /* Remove default bullet */
            margin-bottom: 5px;
            display: flex;
            align-items: flex-start;
        }
        .course-card .course-list li i {
            color: #28a745; /* Green checkmark */
            margin-right: 8px;
            margin-top: 3px; /* Align checkmark vertically */
        }

        .course-card .btn-learn-more {
            background: linear-gradient(90deg, #3B82F6, #60A5FA);
            border: none;
            color: white;
            padding: 0.7rem 1.8rem;
            border-radius: 999px;
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(59,130,246,0.2);
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.03em;
            align-self: center; /* Center button in flex column */
        }
        .course-card .btn-learn-more:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(59,130,246,0.3);
        }

        /* Footer */
        .main-footer {
            background: linear-gradient(90deg,#0A192F,#0D223B);
            padding: 3rem 0;
            color: #A0B9CE;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .main-footer h5 { color: #fff; font-family: 'Poppins', sans-serif; margin-bottom: 1.5rem;}
        .main-footer a { color: #A0B9CE; }
        .main-footer a:hover { color: var(--accent-gold); }
        .main-footer .form-control {
            background-color: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            color: #E2E8F0;
        }
        .main-footer .form-control::placeholder { color: #A0B9CE; }
        .main-footer .form-control:focus {
            background-color: rgba(255,255,255,0.15);
            border-color: var(--accent-gold);
            box-shadow: 0 0 0 0.25rem rgba(255,215,0,0.25);
            color: #E2E8F0;
        }
        .main-footer .btn-warning {
            background-color: var(--accent-gold);
            border-color: var(--accent-gold);
            color: var(--navy);
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .main-footer .btn-warning:hover {
            background-color: #FFC107; /* Slightly brighter gold */
            border-color: #FFC107;
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(255,215,0,0.3);
        }


        /* General Section Styling */
        .section-padding { padding: 5rem 0; }
        .section-light {
            background-color: #FFFFFF;
            color: var(--dark-text);
        }
        .section-dark {
            background: var(--gradient-dark-blue);
            color: #E2E8F0;
        }
        .section-title {
            font-size: clamp(2.2rem, 4vw, 3rem);
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-align: center;
            position: relative;
            padding-bottom: 10px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 0;
            width: 80px;
            height: 4px;
            background-color: var(--accent-gold);
            border-radius: 2px;
        }
        .section-light .section-title::after {
            background-color: var(--navy);
        }
        .text-lead { font-size: 1.15rem; color: #B0D9EE; text-align: center; max-width: 800px; margin: 0 auto 3rem; }
        .section-light .text-lead { color: var(--mid-gray-text); }


        /* Dynamic Section Separators (SVG based) */
        .svg-separator {
            width: 100%;
            height: 100px; /* Adjust based on desired curve height */
            display: block;
        }
        .svg-separator svg {
            width: 100%;
            height: 100%;
            display: block;
        }
        /* Top curve for light section following dark */
        .svg-separator.top-light-curve {
            background-color: var(--gradient-dark-blue); /* Matches previous section's background */
        }
        .svg-separator.top-light-curve svg path {
            fill: #FFFFFF; /* Fills the shape with the next section's background color */
            animation: wave 10s cubic-bezier(0.4, 0, 0.6, 1) infinite alternate;
        }
        /* Bottom curve for light section preceding dark */
        .svg-separator.bottom-light-curve {
            background-color: #FFFFFF; /* Matches previous section's background */
        }
        .svg-separator.bottom-light-curve svg path {
            fill: var(--gradient-dark-blue); /* Fills the shape with the next section's background color */
            animation: wave 10s cubic-bezier(0.4, 0, 0.6, 1) infinite alternate reverse;
        }
         /* Top curve for dark section following light blue */
        .svg-separator.top-dark-curve {
            background-color: var(--light-sky); /* Matches previous section's background */
        }
        .svg-separator.top-dark-curve svg path {
            fill: var(--gradient-dark-blue); /* Fills the shape with the next section's background color */
            animation: wave 10s cubic-bezier(0.4, 0, 0.6, 1) infinite alternate;
        }
        /* Bottom curve for dark section preceding light blue */
        .svg-separator.bottom-dark-curve {
            background: var(--gradient-dark-blue); /* Matches previous section's background */
        }
        .svg-separator.bottom-dark-curve svg path {
            fill: var(--light-sky); /* Fills the shape with the next section's background color */
            animation: wave 10s cubic-bezier(0.4, 0, 0.6, 1) infinite alternate reverse;
        }

        @keyframes wave {
            0% { transform: translate3d(0, 0, 0) scaleY(1) skewX(0deg); }
            50% { transform: translate3d(-15px, 8px, 0) scaleY(1.03) skewX(1deg); } /* More pronounced vertical and horizontal movement, slight scale and skew */
            100% { transform: translate3d(0, 0, 0) scaleY(1) skewX(0deg); }
        }


        /* Small screens adjustments */
        @media (max-width: 767px){
            .hero{ padding:60px 0; text-align:center; }
            .hero-left { text-align:center; }
            .floating{ display:none; }
            .section-padding { padding: 3rem 0; }
            .section-title { font-size: 1.8rem; }
            .text-lead { font-size: 1rem; margin-bottom: 2rem;}
            .svg-separator { height: 50px; }
            .course-card .card-icon { font-size: 3rem; }
            .course-card .card-title { font-size: 1.4rem; }
            .course-card .btn-learn-more { padding: 0.6rem 1.5rem; }
        }
         /* Social Media Icons */
        .social-icons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-top: 2rem;
            padding: 1rem 0;
        }
        .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            font-size: 1.5rem;
            color: #fff;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            position: relative;
            overflow: hidden;
        }
        .social-icons a:hover {
            transform: translateY(-4px) rotate(10deg);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }
        .social-icons a::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: 0.5s;
        }
        .social-icons a:hover::before {
            left: 100%;
        }
        .social-icons .icon-instagram {
            background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%);
        }
        .social-icons .icon-facebook {
            background: #1877F2;
        }
        .social-icons .icon-linkedin {
            background: #0077B5;
        }
        .social-icons .icon-twitter {
            background: #000000;
        }
        /* Bouncing Animation for Social Icons */
        @keyframes bounce {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        .social-icons a:nth-child(1) { animation: bounce 2s ease infinite 0.2s; }
        .social-icons a:nth-child(2) { animation: bounce 2s ease infinite 0.4s; }
        .social-icons a:nth-child(3) { animation: bounce 2s ease infinite 0.6s; }
        .social-icons a:nth-child(4) { animation: bounce 2s ease infinite 0.8s; }
        /* Responsive Adjustments for Social Icons */
        @media (max-width: 640px) {
            .social-icons a {
                width: 40px;
                height: 40px;
                font-size: 1.25rem;
            }
        }