:root {
    
    --clr-dark: #121827;        
    --clr-surface: #1e283b;     

    --clr-primary: #D16DFF;     
    --clr-secondary: #FFD700;   
    
    
    --clr-saffron: #FF9933;     
    --clr-navy-blue: #000080;   
    --clr-green: #138808;       
    --clr-white: #FFFFFF;       


    --clr-text: #e0e6f8;        
    --clr-link: var(--clr-primary); 
    --clr-shadow: rgba(0, 0, 0, 0.5);

    
    --font-heading: 'Fira Code', 'Poppins', monospace;
    --font-body: 'Poppins', sans-serif;

    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--clr-dark);
    color: var(--clr-text);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

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

a:hover {
    color: var(--clr-secondary);
}


h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--clr-text);
    font-weight: 700;
}


.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--clr-primary);
    color: var(--clr-dark);
    border-color: var(--clr-primary);
}

.btn-primary:hover {
    background-color: #B23AE8; 
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(209, 109, 255, 0.6);
}

.btn-secondary {
    background-color: transparent;
    color: var(--clr-secondary);
    border-color: var(--clr-secondary);
}

.btn-secondary:hover {
    background-color: var(--clr-secondary);
    color: var(--clr-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.6); 
}


.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    border-bottom: 3px solid var(--clr-primary);
    display: inline-block;
    padding-bottom: 0.5rem;
    color: var(--clr-primary);
}


/* 2. Header and Navigation */

.main-header {
    background-color: var(--clr-surface);
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 10px var(--clr-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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


/* LOGO ANIMATIONS */


@keyframes logo-float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
    100% { transform: translateY(0); }
}

@keyframes neon-flicker {
    0%, 100% {
        text-shadow: 
            /* 1. CRISP WHITE/BRIGHT LAYER (Sharpen the edges) */
            0 0 4px #FFFFFF, 
            /* 2. BRIGHT CORE PURPLE */
            0 0 12px var(--clr-primary), 
            0 0 25px var(--clr-primary),
            /* 3. WIDE, SOFT PURPLE BASE GLOW */
            0 0 50px rgba(209, 109, 255, 0.8), 
            /* 4. YELLOW FLICKER */
            0 0 15px var(--clr-secondary); 
        color: var(--clr-primary); 
    }
    50% {
        text-shadow: 
            /* 1. CRISP WHITE/BRIGHT LAYER (Sharpen the edges) */
            0 0 3px #FFFFFF,
            /* 2. BRIGHT CORE PURPLE (Slightly dimmed) */
            0 0 8px var(--clr-primary),
            0 0 18px var(--clr-primary),
            /* 3. WIDE, SOFT PURPLE BASE GLOW */
            0 0 30px rgba(209, 109, 255, 0.5), 
            /* 4. STRONGER YELLOW PULSE */
            0 0 25px var(--clr-secondary); 
        color: var(--clr-primary); 
    }
}


.logo {
    display: flex; 
    align-items: center;
    gap: 8px; 
    padding: 0;
    font-family: var(--font-heading);
    font-weight: 700;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.03); 
}

.logo img {
    height: 36px; 
    vertical-align: middle;
    animation: logo-float 4s ease-in-out infinite; 
    
    filter: drop-shadow(0 0 5px var(--clr-primary)) drop-shadow(0 0 10px rgba(209, 109, 255, 0.3));
    transition: filter 0.3s ease; 
}

.logo:hover img {
    filter: drop-shadow(0 0 10px var(--clr-primary)) drop-shadow(0 0 20px var(--clr-secondary));
}

.logo span {
    font-size: 1.8rem; 
    color: var(--clr-primary); 
    line-height: 1;
    
    animation: neon-flicker 1.5s infinite alternate; 
    transition: text-shadow 0.3s ease, color 0.3s ease; 
}

.logo:hover span {
    color: var(--clr-secondary); 
    text-shadow: 
        0 0 10px var(--clr-secondary), 
        0 0 20px var(--clr-secondary),
        0 0 35px rgba(255, 215, 0, 0.8); 
    animation: none; 
}


.main-nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--clr-text);
    padding: 0.5rem;
    transition: color 0.3s ease;
    font-weight: 600;
}

.main-nav a:hover {
    color: var(--clr-secondary); 
    border-bottom: 2px solid var(--clr-secondary); 
}


.menu-toggle {
    display: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    cursor: pointer;
    z-index: 1010;
}

.bar {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--clr-primary); 
    transition: all 0.3s ease;
}


/* 3. Hero Section */

.hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    text-align: center;
    
    background-image: 
        linear-gradient(rgba(18, 24, 39, 0.85), rgba(18, 24, 39, 0.95)), 
        url('strike_animated_bg.gif'); 
    
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-content {
    padding: var(--spacing-lg) 0;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    margin-bottom: var(--spacing-md);
    position: relative;
    color: var(--clr-primary); 
    
    text-shadow: 0.05em 0 0 var(--clr-secondary), -0.05em -0.025em 0 var(--clr-text), 0.025em 0.05em 0 var(--clr-primary);
    animation: glitch-anim 2s infinite alternate;
}

.glitch-text span {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.8;
}

.glitch-text span:first-child {
    clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%);
    transform: translate(-0.02em, -0.01em);
    text-shadow: 0.02em 0 0 var(--clr-secondary); 
    animation: glitch-anim-1 2s infinite alternate-reverse;
}

.glitch-text span:last-child {
    clip-path: polygon(0 66%, 100% 66%, 100% 100%, 0 100%);
    transform: translate(0.01em, 0.02em);
    text-shadow: -0.02em 0 0 var(--clr-secondary); 
    animation: glitch-anim-2 2s infinite alternate;
}

@keyframes glitch-anim {
    0% { transform: none; opacity: 1; }
    7% { transform: translate(-1px, -1px); opacity: 0.9; }
    10% { transform: none; opacity: 1; }
    90% { transform: translate(1px, 1px); opacity: 0.9; }
    100% { transform: none; opacity: 1; }
}
@keyframes glitch-anim-1 {
    0% { clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%); }
    20% { clip-path: polygon(0 0, 100% 0, 100% 25%, 0 25%); }
    40% { clip-path: polygon(0 0, 100% 0, 100% 40%, 0 40%); }
}
@keyframes glitch-anim-2 {
    0% { clip-path: polygon(0 66%, 100% 66%, 100% 100%, 0 100%); }
    30% { clip-path: polygon(0 75%, 100% 75%, 100% 100%, 0 100%); }
    60% { clip-path: polygon(0 50%, 100% 50%, 100% 100%, 0 100%); }
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    font-family: var(--font-heading);
}

.btn-cta {
    border: 2px solid var(--clr-secondary); 
    background-color: var(--clr-secondary); 
    color: var(--clr-dark);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.pulse-effect:hover {
    background-color: transparent;
    color: var(--clr-secondary); 
    
    box-shadow: 0 0 20px var(--clr-secondary); 
    transform: scale(1.05);
}

.pulse-effect::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    
    background: rgba(255, 215, 0, 0.2); 
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
    z-index: -1;
}

.pulse-effect:hover::before {
    width: 300%;
    height: 300%;
}



/* NEW: CARD ROW FLEX CONTAINER */


.card-row {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) auto; 
    width: 100%;
    max-width: 1100px; 
}



/* MERGED PROMO CARD STYLES (Diwali & Code Editor) */


/* --- Base Card Shared Styles --- */
.promo-card,
.coding-promo-card {
    /* Set fixed width/flex properties for side-by-side layout */
    flex: 1 1 48%; 
    max-width: 550px; 
    margin: 0; 
    
    border-radius: 8px; 
    padding: var(--spacing-md);
    position: relative;
    overflow: hidden;
    text-align: center; 
}


/* 1. Diwali Promo Card (.promo-card) Styles */
.promo-card {
    background-color: var(--clr-surface);
    
    /* Indian Flag Theming */
    background-image: 
        linear-gradient(rgba(30, 40, 59, 0.8), rgba(30, 40, 59, 0.9)), 
        url('strike2.png'); 
    background-size: cover;
    background-position: center;
    
    /* Saffron (Top), White (Middle), Green (Bottom) Border */
    border: 3px solid transparent; 
    border-image: linear-gradient(to right, 
        var(--clr-saffron) 0%, 
        var(--clr-white) 50%, 
        var(--clr-green) 100%);
    border-image-slice: 1;
    
    box-shadow: 0 0 20px rgba(255, 153, 51, 0.4); 
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    
    animation: glow-border 4s infinite alternate, 
               cracker-sparkle 1s infinite linear; 
}

/* Diwali Card Specific Content Styles */
.promo-card .promo-title {
    color: var(--clr-saffron);
}
.promo-card .promo-cta {
    color: var(--clr-text);
}


/*  2. Code Editor Card (.coding-promo-card) Styles  */
.coding-promo-card {
    background-color: #1a1a1a; 
    border: 2px solid var(--clr-primary);
    border-radius: 12px; 
    padding: 0; 
    
    /* Purple Neon Glow Pulse */
    box-shadow: 0 0 10px rgba(209, 109, 255, 0.5);
    animation: neon-border-pulse 3s infinite alternate;
}

/* Code Card Header */
.code-header {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: #181818; 
    border-bottom: 1px solid #333;
}
.traffic-lights { display: flex; gap: 8px; }
.dot { display: block; width: 12px; height: 12px; border-radius: 50%; opacity: 0.8; }
.dot.red { background-color: #ff5f56; }
.dot.yellow { 
    background-color: var(--clr-secondary); 
    box-shadow: 0 0 8px var(--clr-secondary), 0 0 15px rgba(255, 215, 0, 0.5); 
} 
.dot.green { background-color: #27c93f; }
.file-name { flex-grow: 1; text-align: center; font-size: 0.9rem; color: #999; }
.status-light { font-size: 0.8rem; color: var(--clr-green); }
.status-light .live-status::before { 
    content: ''; display: inline-block; width: 8px; height: 8px; border-radius: 50%;
    background-color: var(--clr-green); margin-right: 5px; box-shadow: 0 0 5px var(--clr-green);
    animation: live-pulse 1.5s infinite alternate;
}

/* Code Content (Pre tag) */
.code-content {
    font-family: var(--font-heading); font-size: 0.95rem; text-align: left;
    white-space: pre-wrap; margin: 0; padding: 1rem; line-height: 1.4;
    background-color: #1a1a1a;
}

/* Syntax Highlighting */
.line-number { width: 25px; text-align: right; margin-right: 15px; color: #666; user-select: none;}
.keyword, .private, .const { color: var(--clr-primary); font-weight: 600; }
.type { color: #00FFFF; /* Cyan */ }
.string, .string-continuation { color: var(--clr-saffron); }
.class-name { 
    color: var(--clr-secondary); 
    font-weight: 700; 
    text-shadow: 0 0 5px var(--clr-secondary); 
}
.variable { color: var(--clr-text); }
.blinking-cursor {
    color: var(--clr-secondary); font-weight: 700; font-size: 1.1em;
    text-shadow: 0 0 10px var(--clr-secondary), 0 0 20px rgba(255, 215, 0, 0.7); 
    animation: blink-cursor 0.7s infinite step-end;
    display: inline-block;
}

/*  Shared Animations (Defined once)  */
@keyframes neon-border-pulse { 
    0% { box-shadow: 0 0 8px var(--clr-primary); } 
    100% { box-shadow: 0 0 18px var(--clr-primary), 0 0 30px var(--clr-secondary); } 
}

@keyframes glow-border { 
    0% { box-shadow: 0 0 10px rgba(255, 153, 51, 0.4); }
    100% { box-shadow: 0 0 25px var(--clr-saffron), 0 0 40px var(--clr-navy-blue); }
}

@keyframes cracker-sparkle { 
    0% { box-shadow: 0 0 5px var(--clr-saffron), 0 0 10px var(--clr-green), 30px 10px 15px rgba(255, 153, 0, 0.5); }
    50% { box-shadow: 0 0 8px var(--clr-saffron), 0 0 8px var(--clr-green), -20px -25px 10px rgba(255, 255, 255, 0.5); }
    100% { box-shadow: 0 0 5px var(--clr-saffron), 0 0 10px var(--clr-green), 60px 20px 20px rgba(255, 153, 0, 0.1); }
}

@keyframes live-pulse { 
    0% { opacity: 0.5; box-shadow: 0 0 5px var(--clr-green); }
    100% { opacity: 1; box-shadow: 0 0 10px var(--clr-green); }
}

@keyframes blink-cursor { 
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}



/* 3.6. STRIKE Animated Text Section (Indian Flag Colors) - CENTERED */
.mission-statement-section {
    
    min-height: 40vh; 
    display: flex;
    align-items: center; 
    justify-content: center; 
    
    padding: var(--spacing-lg) 0;
    background-color: var(--clr-surface);
    border-top: 2px solid var(--clr-saffron);
    border-bottom: 2px solid var(--clr-green);
}

.mission-statement-section .container {
    
    width: 100%;
    margin: 0;
}

.mission-statement-section .huge-text {
    font-size: clamp(4rem, 15vw, 10rem); 
    color: var(--clr-dark); 
    
    text-transform: uppercase;
    font-weight: 900;
    
    position: relative;
    display: inline-block;
    
    letter-spacing: 0.1em;
    padding-left: 1.60em;
    
    background: linear-gradient(90deg, var(--clr-saffron), var(--clr-white), var(--clr-green), var(--clr-saffron));
    background-size: 400% 100%; 
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    
    text-shadow: 
        0 0 10px rgba(0, 0, 128, 0.5), 
        0 0 20px rgba(255, 153, 51, 0.5); 
    
    animation: neon-pulse-flag 2s infinite alternate, text-scan 4s infinite linear;
}

@keyframes neon-pulse-flag {
    0% {
        text-shadow: 
            0 0 5px rgba(0, 0, 128, 0.2),
            0 0 10px rgba(0, 0, 128, 0.2);
        opacity: 0.8;
    }
    100% {
        text-shadow: 
            0 0 15px var(--clr-saffron),
            0 0 25px var(--clr-green),
            0 0 40px var(--clr-navy-blue);
        opacity: 1;
    }
}

@keyframes text-scan {
    0% {
        background-position: 0% center;
    }
    100% {
        background-position: 300% center; 
    }
}


/* 4. Course Cards Section */

.course-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--clr-dark);
    position: relative; 
    z-index: 10; 
}

.course-grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: repeat(3, 1fr); 
    perspective: 1000px;
}

.course-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background-color: var(--clr-surface);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--clr-text);
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.6s ease;
    position: relative;
    overflow: hidden;
}

.course-card:hover {
    transform: rotateX(5deg) rotateY(-5deg) scale(1.02);
    
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.6), 0 0 25px var(--clr-secondary); 
    border-color: var(--clr-secondary); 
}


.course-thumbnail {
    
    width: calc(100% + 8rem); 
    margin: -2rem -2rem 1rem -2rem; 
    
    height: 350px; 
    
    object-fit: cover; 
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    opacity: 1; 
    filter: brightness(0.9) grayscale(10%);
    transition: filter 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
}

.course-card:hover .course-thumbnail {
    opacity: 1;
    transform: scale(1.02); 
    filter: brightness(1) grayscale(0); 
}

.card-icon {
    font-size: 2.5rem;
    color: var(--clr-primary);
    margin-bottom: var(--spacing-sm);
    transition: color 0.3s ease;
    margin-top: 0; 
}

.course-card:hover .card-icon {
    color: var(--clr-secondary); 
}

.course-card h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-xs);
    color: var(--clr-text); 
}

.course-card p {
    font-size: 0.9rem;
    flex-grow: 1;
    margin-bottom: var(--spacing-sm);
}

.course-card span.click {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 2px;
    font-size: 0.75rem;
    font-weight: 700;
    margin: 0.2rem;
    font-family: var(--font-heading);
    letter-spacing: 1px;
    
    background-color: var(--clr-secondary); 
    color: var(--clr-dark);
    
    animation: neon-pulse-small 2s infinite alternate; 
    cursor: pointer;
}

@keyframes neon-pulse-small {
    0% {
        box-shadow: 0 0 8px rgba(255, 255, 255, 0.6); 
    }
    100% {
        box-shadow: 0 0 15px var(--clr-secondary), 0 0 25px rgba(255, 215, 0, 0.9); 
    }
}


.card-footer {
    margin-top: var(--spacing-sm);
}

.price {
    font-size: 1.5rem;
    color: var(--clr-primary);
    font-family: var(--font-heading);
}


/* 5. Meet Your Instructors Section */
.instructors-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--clr-surface);
    text-align: center;
}

.instructors-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}


.instructor-grid {
    display: flex;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 1100px;
    margin-top: var(--spacing-md);
    justify-content: center;
    align-items: stretch; 
}

.instructor-card {
    flex: 1 1 45%; 
    background-color: var(--clr-dark);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: 0 8px 20px var(--clr-shadow);
    
    border: 1px solid rgba(209, 109, 255, 0.2); 
    display: flex;
    flex-direction: column; 
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease;
    
    min-height: 500px; 
}

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

.instructor-image-wrapper {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--clr-primary);
    box-shadow: 0 0 15px var(--clr-primary);
    transition: transform 0.4s ease-out, box-shadow 0.4s ease-out;
    margin-bottom: var(--spacing-sm);
}

.instructor-image-wrapper:hover {
    box-shadow: 0 0 25px var(--clr-secondary), 0 0 40px rgba(209, 109, 255, 0.6);
}

.instructor-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.instructor-details {
    text-align: center;
    display: flex;
    flex-direction: column;
    flex-grow: 1; 
    width: 100%; 
}

.instructor-details h3 {
    font-size: 1.6rem;
    color: var(--clr-primary);
    margin-bottom: var(--spacing-xs);
}

.instructor-title {
    font-style: italic;
    color: var(--clr-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.instructor-tags {
    display: flex;
    justify-content: center;
    overflow-x: auto; 
    padding-bottom: 5px; 
    margin-bottom: var(--spacing-sm);
}

.instructor-tags span {
    display: inline-block;
    
    background-color: rgba(255, 215, 0, 0.2);
    color: var(--clr-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    margin: 0.2rem;
    font-family: var(--font-heading);
    white-space: nowrap; 
    flex-shrink: 0;
}

.instructor-details p {
    margin-top: var(--spacing-sm);
    font-size: 0.95rem;
    line-height: 1.6;
    min-height: 80px; 
    flex-grow: 1;
}

.instructor-actions {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: auto; 
    padding-top: var(--spacing-sm);
}


/* 6. Contact Section (Form) */

.contact-section {
    padding: var(--spacing-lg) 0;
    background-color: var(--clr-dark);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    background-color: var(--clr-surface);
    color: var(--clr-text);
    font-family: var(--font-body);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--clr-primary);
    outline: none;
    box-shadow: 0 0 8px var(--clr-primary);
}

.contact-form textarea {
    resize: vertical;
}

.btn-submit {
    background: none;
    border: 2px solid var(--clr-primary);
    color: var(--clr-primary);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--clr-primary);
    z-index: -1;
    transform: translateX(-100%); 
    transition: transform 0.4s ease-out;
}

.btn-submit:hover::before {
    transform: translateX(0);
}

.btn-submit:hover {
    color: var(--clr-dark);
    box-shadow: 0 0 15px var(--clr-primary);
}


/* 7. Footer */

.main-footer {
    background-color: var(--clr-surface);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--clr-primary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap; 
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.footer-col {
    flex: 1 1 200px; 
}

.footer-col h4 {
    font-size: 1.2rem;
    color: var(--clr-primary);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul li a {
    color: var(--clr-text);
    font-size: 0.95rem;
}

.footer-col ul li a:hover {
    color: var(--clr-secondary);
    border-bottom: none;
}

.footer-about .logo {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-xs);
    gap: 6px;
}

.footer-about p {
    font-size: 0.85rem;
}

.footer-copyright {
    text-align: center;
    
    border-top: 1px solid rgba(209, 109, 255, 0.1); 
    padding-top: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-links a {
    font-size: 1.5rem;
    margin-right: var(--spacing-sm);
    margin-left: 0;
    color: var(--clr-text); 
    transition: transform 0.3s ease, color 0.3s ease;
}

.social-links a:hover {
    transform: scale(1.2) translateY(-2px);
    color: var(--clr-primary); 
}

.social-links a:hover .fa-github {
    color: #181717; 
}

.social-links a:hover .fa-linkedin { 
    color: #0A66C2; 
}

.social-links a:hover .fa-twitter {
    color: #1A1D20; 
}
/* 8. Responsiveness (Media Queries) */


@media (max-width: 992px) {
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .instructor-grid {
        flex-direction: column; 
        align-items: center;
        max-width: 500px; 
    }

    .instructor-card {
        flex: 1 1 100%;
        min-height: auto; 
    }

    .instructor-details p {
        min-height: 0; 
        flex-grow: 0;
    }

    .instructor-actions {
        justify-content: center;
    }
}

@media (max-width: 900px) {
    
    .card-row {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .promo-card,
    .coding-promo-card {
        flex: 1 1 100%; 
        max-width: 500px; 
        width: 90%; 
    }
}


@media (max-width: 768px) {
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--clr-surface);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-in-out;
        box-shadow: 0 10px 10px var(--clr-shadow);
    }

    .menu-toggle:checked ~ .main-nav {
        max-height: 350px;
        padding: var(--spacing-sm) 0;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 0;
    }

    .main-nav a {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .hamburger {
        display: flex;
    }

    .menu-toggle:checked + .hamburger .bar:nth-child(1) {
        transform: translateY(11px) rotate(45deg);
    }

    .menu-toggle:checked + .hamburger .bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle:checked + .hamburger .bar:nth-child(3) {
        transform: translateY(-11px) rotate(-45deg);
    }
}

@media (max-width: 576px) {
    .course-grid {
        grid-template-columns: 1fr; 
    }
    
    .footer-content {
        flex-direction: column; 
        align-items: center;
        text-align: center;
    }
    
    .footer-col {
        flex: 1 1 100%; 
    }
    
    .nav-container .btn-primary {
        display: none; 
    }
    
    .promo-card {
        padding: var(--spacing-sm);
    }
    
    .coding-promo-card {
        max-width: 90%;
    }
    .code-content {
        font-size: 0.85rem;
    }
}