/* ==========================================================================
   NEP India - Modern Front-End Design System & Overrides
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --bg-base: #060814;
    --bg-surface: #0b0f19;
    --bg-card: rgba(17, 24, 39, 0.6);
    --bg-glass: rgba(6, 8, 20, 0.75);
    
    --border-light: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(99, 102, 241, 0.4);
    
    --color-primary: #6366f1; /* Neon Indigo */
    --color-primary-rgb: 99, 102, 241;
    --color-secondary: #8b5cf6; /* Electric Violet */
    --color-secondary-rgb: 139, 92, 246;
    --color-accent: #f59e0b; /* Sunset Amber */
    --color-accent-rgb: 245, 158, 11;
    --color-success: #10b981;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
    
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-base: all 0.4s var(--ease-out);
}

/* ==========================================================================
   Global Reset & Defaults
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}

/* ==========================================================================
   Custom Scrollbar & Scroll Progress Indicator
   ========================================================================== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-accent) 100%);
    width: 0%;
    z-index: 10000;
    transition: width 0.1s linear;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.section-bg-surface {
    background-color: var(--bg-surface);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    padding: 20px 0;
    transition: var(--transition-base);
    border-bottom: 1px solid transparent;
}

.main-header.scrolled {
    padding: 12px 0;
    background-color: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(190%);
    -webkit-backdrop-filter: blur(20px) saturate(190%);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
}

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

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-image {
    height: 48px;
    width: auto;
    object-fit: contain;
    transition: var(--transition-base);
}

.logo-link:hover .logo-image {
    transform: scale(1.04);
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.3));
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 10px;
}

.nav-item a {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 8px 18px;
    border-radius: 30px;
    color: var(--text-secondary);
}

.nav-item a:hover,
.nav-item a.active {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-item a.active {
    box-shadow: inset 0 0 0 1px var(--border-light);
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.1), rgba(var(--color-secondary-rgb), 0.1));
    color: var(--color-primary);
}

/* Mobile Nav Drawer Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: var(--transition-base);
}

@media (max-width: 991px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background-color: var(--bg-surface);
        border-left: 1px solid var(--border-light);
        flex-direction: column;
        justify-content: center;
        gap: 20px;
        transition: var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.open {
        right: 0;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* ==========================================
   Hero Section
   ========================================== */
.hero-section {
    padding: 220px 0 140px 0;
    background-image: radial-gradient(circle at top right, rgba(99, 102, 241, 0.08), transparent 40%),
                      radial-gradient(circle at bottom left, rgba(139, 92, 246, 0.05), transparent 45%);
    text-align: center;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    display: inline-block;
    background: rgba(245, 158, 11, 0.08);
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.hero-title {
    font-size: 64px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -1.5px;
    max-width: 900px;
    margin: 0 auto 30px auto;
    background: linear-gradient(135deg, #ffffff 40%, #a5b4fc 70%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 750px;
    margin: 0 auto 40px auto;
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* Premium Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 15px;
    padding: 14px 28px;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--text-primary);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }
    .hero-description {
        font-size: 16px;
    }
    .hero-ctas {
        flex-direction: column;
        padding: 0 20px;
    }
}

/* ==========================================
   Section Headings
   ========================================== */
.section-header {
    max-width: 700px;
    margin-bottom: 60px;
}

.section-header.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-subtitle {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
    display: block;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
}

.section-title span {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 32px;
    }
}

/* ==========================================
   Responsive Grid & Dual Column layouts
   ========================================== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

@media (max-width: 991px) {
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Glassmorphic Interactive Card Structure
   ========================================== */
.glass-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 24px;
    padding: 40px;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), transparent 60%);
    z-index: 1;
    pointer-events: none;
    transition: var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-focus);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.glass-card:hover::before {
    opacity: 0.8;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-primary);
    margin-bottom: 24px;
    transition: var(--transition-base);
}

.glass-card:hover .card-icon {
    background: var(--color-primary);
    color: var(--text-primary);
    transform: scale(1.08) rotate(5deg);
    box-shadow: 0 0 15px var(--color-primary);
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.card-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    margin-top: 24px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 14.5px;
    color: var(--text-secondary);
}

.feature-item i {
    color: var(--color-accent);
    font-size: 16px;
}

/* ==========================================
   Courses Section (With Categories Filter)
   ========================================== */
.filter-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 50px;
}

.filter-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
}

/* Course Cards */
.course-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-focus);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(139, 92, 246, 0.1);
}

.course-thumb {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.course-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.course-card:hover .course-thumb img {
    transform: scale(1.06);
}

.course-thumb::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 40%, rgba(6, 8, 20, 0.8) 100%);
}

.course-content {
    padding: 30px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-category {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.course-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.4;
    transition: var(--transition-base);
}

.course-card:hover h4 {
    color: var(--color-primary);
}

.course-details {
    list-style: none;
    margin-top: auto;
}

.course-details li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.course-details li i {
    font-size: 12px;
    color: var(--color-primary);
}

/* Animations for filter filtering action */
.course-item {
    transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.course-item.hide {
    opacity: 0;
    transform: scale(0.8);
    position: absolute;
    width: 0;
    height: 0;
    padding: 0;
    margin: 0;
    border: none;
    overflow: hidden;
    pointer-events: none;
}

/* ==========================================
   Selection Timeline Section
   ========================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 50px auto 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 31px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    opacity: 0.3;
}

.timeline-step {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-step:last-child {
    margin-bottom: 0;
}

.timeline-badge {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 800;
    color: var(--color-primary);
    flex-shrink: 0;
    z-index: 2;
    transition: var(--transition-base);
}

.timeline-step:hover .timeline-badge {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--text-primary);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.timeline-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    padding: 24px 30px;
    border-radius: 20px;
    width: 100%;
}

.timeline-content h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14.5px;
    color: var(--text-secondary);
    line-height: 1.6;
}

@media (max-width: 640px) {
    .timeline::before {
        left: 21px;
    }
    .timeline-badge {
        width: 44px;
        height: 44px;
        font-size: 16px;
    }
    .timeline-step {
        gap: 15px;
    }
}

/* ==========================================
   Testimonial Slider (Custom Vanilla)
   ========================================== */
.slider-container {
    position: relative;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.slider-track {
    display: flex;
    transition: transform 0.6s var(--ease-out);
}

.slide {
    width: 100%;
    flex-shrink: 0;
}

.testimonial-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 28px;
    padding: 50px;
    text-align: center;
    position: relative;
}

.testimonial-quote {
    font-size: 18px;
    font-style: italic;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 30px;
}

.testimonial-user {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.testimonial-user img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    background-color: #fff;
    padding: 3px;
}

.testimonial-info h5 {
    font-size: 16px;
    font-weight: 700;
}

.testimonial-info span {
    font-size: 12px;
    color: var(--color-accent);
    text-transform: uppercase;
    font-weight: 600;
}

/* Slider Controls */
.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-top: 30px;
}

.slider-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.slider-btn:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.slider-dots {
    display: flex;
    gap: 8px;
}

.slider-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-base);
}

.slider-dot.active {
    background-color: var(--color-primary);
    width: 20px;
    border-radius: 4px;
}

/* ==========================================
   Image Marquee (Success Banner)
   ========================================== */
.success-marquee {
    padding: 60px 0;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
    width: 100%;
    overflow: hidden;
}

.marquee-container {
    display: flex;
    width: max-content;
    animation: marquee 100s linear infinite;
}

.marquee-container img {
    width: 250px;
    height: 180px;
    object-fit: cover;
    margin: 0 15px;
    border-radius: 20px;
    border: 1px solid var(--border-light);
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.marquee-container img:hover {
    transform: scale(1.06) rotate(1deg);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(245, 158, 11, 0.2);
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ==========================================
   Contact Forms & Inputs
   ========================================== */
.form-group {
    position: relative;
    margin-bottom: 24px;
}

.form-control {
    width: 100%;
    background-color: rgba(6, 8, 20, 0.7);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 16px 20px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 15px;
    transition: var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

textarea.form-control {
    min-height: 160px;
    resize: none;
}

/* Google Form Wrapper */
.iframe-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 28px;
    padding: 24px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.iframe-container iframe {
    width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-light);
    padding: 80px 0 40px 0;
    color: var(--text-secondary);
}

.footer-logo {
    margin-bottom: 20px;
    display: inline-block;
}

.footer-desc {
    font-size: 14.5px;
    line-height: 1.7;
    margin-bottom: 30px;
}

.footer-heading {
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 14.5px;
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 6px;
}

.footer-info-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 14.5px;
}

.footer-info-item i {
    color: var(--color-primary);
    font-size: 16px;
    margin-top: 4px;
}

.footer-bottom {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--border-light);
    text-align: center;
    font-size: 13.5px;
    color: var(--text-muted);
}

/* ==========================================
   Back To Top Floating Button
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: -60px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 99;
    transition: var(--transition-base);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.back-to-top.show {
    right: 30px;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.5);
}

/* ==========================================
   Scroll-Animated Viewports
   ========================================== */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-animate.animated {
    opacity: 1;
    transform: translateY(0);
}