/* ==========================================================================
   Addition Infotech Software Testing Website Stylesheet
   Design System: Rich Dark Mode & Elegant Light Mode
   ========================================================================== */

/* Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* CSS variables for light & dark themes */
:root {
    /* Fonts family */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Transition defaults */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --border-radius-full: 9999px;
    
    /* Shared Glow Shadows */
    --glow-primary: 0 0 20px rgba(93, 95, 239, 0.3);
    --glow-secondary: 0 0 20px rgba(0, 210, 255, 0.3);
}

/* Dark Theme Variables (Default) */
[data-theme="dark"] {
    --bg-main: #070913;
    --bg-surface: rgba(22, 31, 48, 0.65);
    --bg-surface-opaque: #121926;
    --bg-surface-hover: rgba(30, 41, 59, 0.8);
    --bg-nav: rgba(7, 9, 19, 0.8);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.18);
    
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-gradient: linear-gradient(135deg, #5d5fef 0%, #00d2ff 100%);
    --accent-gradient-hover: linear-gradient(135deg, #4b4dd8 0%, #00b9e6 100%);
    --accent-color: #5d5fef;
    --accent-secondary: #00d2ff;
    
    --success-color: #10b981;
    --error-color: #ef4444;
    
    --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.85);
    --bg-surface-opaque: #ffffff;
    --bg-surface-hover: rgba(241, 245, 249, 0.95);
    --bg-nav: rgba(248, 250, 252, 0.85);
    
    --border-color: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(15, 23, 42, 0.16);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
    --accent-gradient-hover: linear-gradient(135deg, #4338ca 0%, #0891b2 100%);
    --accent-color: #4f46e5;
    --accent-secondary: #06b6d4;
    
    --success-color: #059669;
    --error-color: #dc2626;
    
    --shadow-main: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 20px 40px -15px rgba(15, 23, 42, 0.12);
}

/* ==========================================================================
   Base Reset & Layout
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    outline: none;
    border: none;
    background: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--border-radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

.text-center {
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 60px auto;
}

/* Background Gradients & Blurs */
.glow-blur {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.15;
}

.glow-1 {
    top: 10%;
    left: 5%;
    background: var(--accent-color);
}

.glow-2 {
    top: 40%;
    right: 5%;
    background: var(--accent-secondary);
}

.glow-3 {
    bottom: 10%;
    left: 20%;
    background: var(--accent-color);
}

/* ==========================================================================
   Interactive Header / Navigation
   ========================================================================== */

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

header.scrolled {
    box-shadow: var(--shadow-main);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

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

.logo-img {
    height: 48px;
    object-fit: contain;
    transition: opacity var(--transition-fast);
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.5px;
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-subtext {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-top: 2px;
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-item {
    position: relative;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 0;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
    border-radius: var(--border-radius-full);
}

.nav-item:hover {
    color: var(--accent-color);
}

.nav-item:hover::after,
.nav-item.active::after {
    width: 100%;
}

.nav-item.active {
    color: var(--accent-color);
}

/* Actions in Navbar */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: var(--text-primary);
    transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-normal), box-shadow var(--transition-fast);
    box-shadow: var(--shadow-main);
}

[data-theme="dark"] .theme-toggle-btn {
    color: #f59e0b; /* Golden sun in dark mode */
}

[data-theme="light"] .theme-toggle-btn {
    color: #4f46e5; /* Indigo/blue moon in light mode */
}

.theme-toggle-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--accent-color);
    transform: scale(1.08) rotate(30deg);
    box-shadow: 0 0 15px rgba(93, 95, 239, 0.35);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: var(--border-radius-full);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* Button UI Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-normal);
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: var(--shadow-main);
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    box-shadow: var(--glow-primary);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

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

.hero-section {
    position: relative;
    padding-top: 180px;
    padding-bottom: 120px;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: var(--border-radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-tag i {
    color: var(--accent-secondary);
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 580px;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

/* Hero Info Stats */
.hero-stats {
    display: flex;
    gap: 40px;
    border-top: 1px solid var(--border-color);
    padding-top: 32px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 2rem;
    font-family: var(--font-heading);
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Hero Visual Card (Mockup / Image Container) */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Hero Visual Showcase with Testing Lab Image */
.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 580px;
    height: 380px;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card), 0 0 30px rgba(93, 95, 239, 0.12);
    overflow: visible; /* Allows floating badges to float outside borders */
    transition: transform var(--transition-slow), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.hero-image-wrapper:hover {
    transform: translateY(-8px) rotateY(-4deg) rotateX(4deg);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card), 0 0 45px rgba(93, 95, 239, 0.22);
}

.hero-lab-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    display: block;
}

/* Glassmorphic details overlay at the bottom of the image */
.hero-image-details-card {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(7, 9, 19, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-md);
    padding: 16px 20px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .hero-image-details-card {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.details-badge {
    align-self: flex-start;
    background: var(--accent-gradient);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 3px 10px;
    border-radius: var(--border-radius-full);
}

.details-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.detail-col {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.detail-lbl {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.detail-val {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.detail-val i {
    color: var(--accent-secondary);
}

/* Floating Badges */
.floating-badge {
    position: absolute;
    background: var(--bg-surface-opaque);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-main);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: floatUpDown 4s ease-in-out infinite;
    z-index: 5;
}

.badge-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(93, 95, 239, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 1rem;
}

.badge-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.badge-text span {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.badge-1 {
    top: -20px;
    left: -40px;
    animation-delay: 0s;
}

.badge-2 {
    bottom: -20px;
    right: -30px;
    animation-delay: 1.5s;
}

.badge-3 {
    top: 50%;
    right: -55px;
    transform: translateY(-50%);
    animation: floatUpDown 4s ease-in-out infinite;
    animation-delay: 0.75s;
}

@keyframes floatUpDown {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-12px);
    }
}

/* ==========================================================================
   Courses Section (Interactive Tab Interface)
   ========================================================================== */

.courses-section {
    background: linear-gradient(180deg, rgba(7, 9, 19, 0) 0%, rgba(22, 31, 48, 0.2) 50%, rgba(7, 9, 19, 0) 100%);
    position: relative;
}

.tabs-container {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

.tab-btn {
    padding: 14px 28px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    font-family: var(--font-heading);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tab-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-hover);
}

.tab-btn.active {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--glow-primary);
}

/* Tab Content Display */
.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

.course-detail-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
}

.course-info {
    display: flex;
    flex-direction: column;
}

.course-meta-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 32px 0;
}

.meta-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.meta-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(0, 210, 255, 0.1);
    color: var(--accent-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
}

.meta-info-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-info-value {
    font-weight: 700;
    font-size: 0.95rem;
}

.course-objectives {
    margin-bottom: 32px;
}

.objective-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 16px;
}

.objective-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.objective-item i {
    color: var(--success-color);
}

/* Syllabus Accordions */
.syllabus-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-main);
}

.syllabus-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-item {
    border-bottom: 1px solid var(--border-color);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    width: 100%;
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    cursor: pointer;
}

.accordion-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.accordion-header:hover .accordion-title {
    color: var(--accent-color);
}

.accordion-icon {
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out;
}

.accordion-content-inner {
    padding-bottom: 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.syllabus-actions {
    display: flex;
    gap: 16px;
    margin-top: 32px;
}

/* Custom syllabus download progress bar container */
.syllabus-dl-wrapper {
    position: relative;
    width: 100%;
}

.dl-progress-container {
    display: none;
    margin-top: 12px;
    background: var(--border-color);
    height: 6px;
    border-radius: var(--border-radius-full);
    overflow: hidden;
}

.dl-progress-bar {
    width: 0%;
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.1s linear;
}

.dl-progress-text {
    display: none;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-align: right;
}

/* ==========================================================================
   Internship Section
   ========================================================================== */

.internship-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: start;
}

.internship-highlights {
    display: grid;
    gap: 20px;
}

.highlight-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 24px;
    display: flex;
    gap: 20px;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.highlight-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
}

.highlight-num {
    font-size: 1.5rem;
    font-weight: 800;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(93, 95, 239, 0.1);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.highlight-card-title {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.highlight-card-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Built for / Not for comparison tables */
.comparison-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-card);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.comparison-column {
    display: flex;
    flex-direction: column;
}

.comp-header {
    font-size: 1.25rem;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.comp-header.built-for {
    color: var(--success-color);
}

.comp-header.not-for {
    color: var(--error-color);
}

.comp-list {
    list-style: none;
    display: grid;
    gap: 16px;
}

.comp-item {
    display: flex;
    align-items: start;
    gap: 12px;
    font-size: 0.95rem;
}

.comp-item i {
    margin-top: 4px;
    flex-shrink: 0;
}

.comp-item-check i {
    color: var(--success-color);
}

.comp-item-cross i {
    color: var(--error-color);
}

.internship-cta-box {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.cta-box-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================================================
   About Us Section (Instructor Certifications)
   ========================================================================== */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.about-instructor-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    position: relative;
    box-shadow: var(--shadow-card);
}

.about-instructor-card::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    width: calc(100% + 20px);
    height: calc(100% + 20px);
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius-lg) + 8px);
    pointer-events: none;
    z-index: -1;
}

.instructor-badge {
    position: absolute;
    top: -20px;
    right: 30px;
    background: var(--accent-gradient);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 1px;
    padding: 6px 16px;
    border-radius: var(--border-radius-full);
    text-transform: uppercase;
    box-shadow: var(--glow-primary);
}

.instructor-header {
    margin-bottom: 24px;
}

.instructor-name {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.instructor-title {
    font-size: 1.05rem;
    color: var(--accent-secondary);
    font-weight: 600;
}

.instructor-bio {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 24px;
}

.instructor-yoe {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--border-radius-md);
}

.yoe-num {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    color: var(--accent-color);
}

.yoe-lbl {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.yoe-lbl span {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Certifications Layout */
.certifications-section {
    display: flex;
    flex-direction: column;
}

.cert-section-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.cert-section-title i {
    color: var(--accent-color);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.cert-badge {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.cert-badge:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
}

.cert-icon {
    font-size: 1.5rem;
    color: var(--accent-secondary);
}

.cert-info {
    display: flex;
    flex-direction: column;
}

.cert-name {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.cert-issuer {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ==========================================================================
   Reviews / Testimonials Carousel
   ========================================================================== */

.reviews-section {
    position: relative;
    overflow: hidden;
}

.carousel-wrapper {
    position: relative;
    max-width: 850px;
    margin: 0 auto;
}

.carousel-track-container {
    overflow: hidden;
    position: relative;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    list-style: none;
}

.carousel-slide {
    min-width: 100%;
    padding: 0 12px;
}

.review-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-main);
    position: relative;
}

.review-quote-icon {
    font-size: 3rem;
    color: var(--border-hover);
    position: absolute;
    top: 20px;
    left: 40px;
    line-height: 1;
    pointer-events: none;
    opacity: 0.2;
}

.review-stars {
    color: #f59e0b;
    font-size: 1.1rem;
    margin-bottom: 24px;
}

.review-text {
    font-size: 1.125rem;
    color: var(--text-primary);
    line-height: 1.7;
    font-style: italic;
    margin-bottom: 32px;
}

.review-author {
    font-family: var(--font-heading);
}

.author-name {
    font-size: 1.15rem;
    font-weight: 700;
}

.author-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Carousel Controls */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text-primary);
    z-index: 10;
    transition: all var(--transition-fast);
}

.carousel-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-hover);
}

.carousel-btn-prev {
    left: -60px;
}

.carousel-btn-next {
    right: -60px;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
    list-style: none;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot:hover {
    background: var(--border-hover);
}

.carousel-dot.active {
    background: var(--accent-color);
    transform: scale(1.2);
    width: 20px;
    border-radius: var(--border-radius-full);
}

.google-review-badge {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 48px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.google-review-badge i {
    color: #4285f4;
    font-size: 1.15rem;
}

.google-review-badge span {
    font-weight: 700;
    color: var(--text-primary);
}

/* ==========================================================================
   FAQs Section (Collapsible Accordions)
   ========================================================================== */

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-list {
    display: grid;
    gap: 16px;
}

.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-header {
    width: 100%;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    cursor: pointer;
}

.faq-question {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-icon {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease-out;
}

.faq-content-inner {
    padding: 0 24px 24px 24px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   Footer & Contact Info
   ========================================================================== */

footer {
    background: var(--bg-surface-opaque);
    border-top: 1px solid var(--border-color);
    padding-top: 80px;
    padding-bottom: 40px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-desc {
    color: var(--text-muted);
    margin-bottom: 24px;
    max-width: 300px;
}

.footer-links-col {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 24px;
    font-weight: 700;
}

.footer-links {
    list-style: none;
    display: grid;
    gap: 12px;
}

.footer-link-item:hover {
    color: var(--accent-color);
    transform: translateX(4px);
}

.footer-link-item {
    display: inline-flex;
    align-items: center;
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.footer-contact-col {
    display: flex;
    flex-direction: column;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-icon {
    font-size: 1.2rem;
    color: var(--accent-color);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-details {
    display: flex;
    flex-direction: column;
}

.contact-lbl {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.contact-val {
    color: var(--text-primary);
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    list-style: none;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.05rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--glow-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-partners {
    display: flex;
    gap: 16px;
}

.footer-partners span {
    font-weight: 500;
}

/* ==========================================================================
   Modal Dialog Layouts
   ========================================================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(7, 9, 19, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    padding: 24px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-window {
    background: var(--bg-surface-opaque);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 550px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.8);
    position: relative;
    transform: translateY(24px) scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-window {
    transform: translateY(0) scale(1);
}

.modal-close-btn {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    transform: scale(1.05);
}

.modal-header {
    padding: 32px 32px 20px 32px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.modal-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.modal-body {
    padding: 32px;
}

/* Forms UI */
.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    width: 100%;
}

.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(93, 95, 239, 0.15);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* Simulated upload drop-zone */
.file-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    background: rgba(7, 9, 19, 0.2);
}

.file-dropzone:hover, .file-dropzone.dragover {
    border-color: var(--accent-color);
    background: rgba(93, 95, 239, 0.05);
    color: var(--text-primary);
}

.file-dropzone i {
    font-size: 2rem;
    color: var(--accent-color);
}

.file-name-preview {
    font-size: 0.85rem;
    color: var(--success-color);
    font-weight: 600;
    display: none;
}

/* Submit Actions */
.form-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 28px;
}

.form-submit-btn {
    width: 100%;
}

.form-terms {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

/* Success Overlay in modal */
.modal-success-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-surface-opaque);
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-success-screen.active {
    opacity: 1;
    pointer-events: auto;
}

.success-icon-box {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: 24px;
    animation: scaleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.success-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.success-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 320px;
    margin-bottom: 32px;
}

@keyframes scaleIn {
    0% {
        transform: scale(0);
    }
    100% {
        transform: scale(1);
    }
}

/* ==========================================================================
   Animations & Transitions
   ========================================================================== */

@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Placements Section Styles
   ========================================================================== */
.placement-section {
    padding: 80px 0;
    position: relative;
    background: rgba(22, 31, 48, 0.04);
    overflow: hidden;
}

[data-theme="light"] .placement-section {
    background: rgba(79, 70, 229, 0.02);
}

.placement-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    margin: 0 auto 48px auto;
    max-width: 800px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px 48px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-main);
}

.p-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.p-stat-num {
    font-size: 2.2rem;
    font-family: var(--font-heading);
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 6px;
}

.p-stat-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.p-stat-divider {
    width: 1px;
    height: 50px;
    background-color: var(--border-color);
}

.placement-logos-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.placement-logo-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, rgba(22, 31, 48, 0.3) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 24px 32px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-main);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
    min-width: 260px;
    justify-content: center;
}

[data-theme="light"] .placement-logo-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, rgba(255, 255, 255, 0.4) 100%);
}

.placement-logo-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-color);
    box-shadow: var(--glow-primary);
}

.placement-logo-card:hover .company-icon {
    transform: scale(1.15) rotate(5deg);
}

.company-icon {
    font-size: 1.8rem;
    color: var(--accent-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
}

.company-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

@media (max-width: 768px) {
    .placement-stats {
        flex-direction: column;
        gap: 32px;
        padding: 32px 24px;
    }
    .p-stat-divider {
        width: 60%;
        height: 1px;
    }
    .placement-logos-container {
        gap: 20px;
    }
    .placement-logo-card {
        width: 100%;
        min-width: unset;
        padding: 20px;
    }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
    .section-padding {
        padding: 80px 0;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .carousel-btn-prev {
        left: -24px;
    }
    
    .carousel-btn-next {
        right: -24px;
    }
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hero-image-wrapper {
        max-width: 440px;
        height: 300px;
        margin: 0 auto;
    }
    
    .course-detail-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .internship-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    /* Navbar styling on Mobile */
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-surface-opaque);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 60px;
        gap: 40px;
        z-index: 999;
        transition: left var(--transition-normal);
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow-main);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        font-size: 1.25rem;
    }
    
    .nav-actions {
        margin-right: 48px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .certs-grid {
        grid-template-columns: 1fr;
    }
    
    .review-card {
        padding: 32px 20px;
    }
    
    .review-text {
        font-size: 1rem;
    }
    
    .carousel-btn {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-ctas .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
        align-items: center;
    }
    
    .hero-image-wrapper {
        max-width: 320px;
        height: 240px;
    }
    
    .hero-image-details-card {
        bottom: 10px;
        left: 10px;
        right: 10px;
        padding: 10px 14px;
        gap: 6px;
    }
    
    .details-row {
        gap: 10px;
    }
    
    .detail-val {
        font-size: 0.75rem;
    }
    
    .badge-3 {
        display: none;
    }
    
    .badge-1 {
        left: -15px;
        top: -25px;
        padding: 8px 12px;
    }
    
    .badge-2 {
        right: -15px;
        bottom: -25px;
        padding: 8px 12px;
    }
    
    .tabs-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .tab-btn {
        text-align: center;
    }
    
    .objective-list {
        grid-template-columns: 1fr;
    }
    
    .syllabus-actions {
        flex-direction: column;
    }
    
    .syllabus-actions .btn, .syllabus-actions .syllabus-dl-wrapper {
        width: 100%;
    }
}