/* GCDI - Global Competence Development Institute
 * Premium Corporate Styles
 */

/* CSS Variables */
:root {
    --primary-color: #0a2342; /* Navy Blue */
    --primary-dark: #061730;
    --primary-light: #1a3a5f;
    --secondary-color: #8c92ac; /* Silver / Light Gray */
    --secondary-light: #b8bccf;
    --accent-color: #28a745; /* Green */
    --accent-dark: #218838;
    --accent-light: #34ce57;
    --text-dark: #1a1a2e;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-white);
}

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

.btn-secondary {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.btn-secondary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

.btn-outline:hover {
    background-color: var(--accent-color);
    color: var(--text-white);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Header */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    margin-right: 60px;
    margin-left: 20px;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo-img {
    width: auto;
    height: 60px;
    object-fit: contain;
    max-width: 200px;
}

/* Navigation */
.nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    padding: 8px 0;
    position: relative;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

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

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

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-white);
    min-width: 220px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.dropdown-menu a:hover {
    background-color: var(--primary-light);
    color: var(--text-white);
}

.header-cta {
    display: flex;
    align-items: center;
    margin-left: 80px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    padding: 20px;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mobile-menu-list a {
    display: block;
    padding: 12px;
    color: var(--text-dark);
    font-weight: 500;
    border-radius: 6px;
}

.mobile-menu-list a:hover,
.mobile-menu-list a.active {
    background-color: var(--bg-light);
    color: var(--accent-color);
}

.mobile-submenu {
    list-style: none;
    padding-left: 20px;
    margin-top: 10px;
    display: none;
}

.mobile-menu-list li:hover .mobile-submenu {
    display: block;
}

.mobile-submenu li {
    padding: 8px 0;
}

.mobile-submenu a {
    color: var(--text-dark);
    font-size: 0.9rem;
    padding: 8px 12px;
}

.mobile-cta {
    margin-top: 10px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--text-white);
    padding: 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
    min-height: 500px;
}

.hero-text {
    padding: 80px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-image {
    position: relative;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hero-text h1 {
    color: var(--text-white);
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero-text p {
    color: var(--secondary-light);
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
}

/* Sections */
.section {
    padding: 80px 0;
}

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

.section-dark {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--text-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark p {
    color: var(--text-white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Course Cards */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.course-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.course-image {
    height: 200px;
    overflow: hidden;
}

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

.course-card:hover .course-image img {
    transform: scale(1.05);
}

.course-content {
    padding: 25px;
}

.course-content h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.course-content p {
    font-size: 0.95rem;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-clamp: 3;
}

.course-duration {
    display: inline-block;
    background-color: var(--bg-light);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 15px;
    white-space: nowrap;
}

.course-actions {
    display: flex;
    gap: 10px;
}

.course-actions .btn {
    flex: 1;
    padding: 10px 15px;
    font-size: 0.875rem;
}

/* Course Categories */
.course-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
}


/* Course List */
.course-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.course-item {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
}

.course-item-left {
    margin-left: 0;
    border-left: 5px solid var(--accent-color);
}

.course-item-right {
    margin-left: auto;
    border-right: 5px solid var(--accent-color);
}

.course-item:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.course-item h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.course-item p {
    color: var(--text-dark);
    line-height: 1.8;
    margin-bottom: 25px;
    font-size: 1.05rem;
}

.course-item .btn {
    display: inline-block;
}

.course-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 20px;
}

.course-list-simple {
    max-width: 600px;
    margin: 0 auto;
}

.course-list-simple ul {
    list-style: none;
    padding: 0;
}

.course-list-simple li {
    margin-bottom: 15px;
}

.course-list-simple a {
    display: block;
    padding: 15px 0;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--secondary-color);
}

.course-list-simple a:hover {
    color: var(--accent-color);
    padding-left: 10px;
}

/* Course Detail Table */
.course-detail-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
    background-color: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.course-detail-table th,
.course-detail-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.course-detail-table th {
    background-color: var(--primary-color);
    color: var(--text-white);
    font-weight: 600;
    width: 30%;
}

.course-detail-table tr:last-child th,
.course-detail-table tr:last-child td {
    border-bottom: none;
}

.course-detail-table tr:hover td {
    background-color: var(--bg-light);
}

/* Course Content Grid */
.course-content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.course-content-item {
    padding: 15px;
    background-color: var(--bg-white);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
    font-size: 0.95rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 35px;
    height: 35px;
    color: var(--text-white);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
    white-space: nowrap;
}

/* About Section */
.about-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    width: 100%;
    height: 100%;
}

.about-image img {
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-content h2 {
    margin-bottom: 1.5rem;
}

.about-content p {
    margin-bottom: 1.5rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
    color: var(--text-white);
    text-align: center;
    padding: 80px 0;
}

.cta-section h2 {
    color: var(--text-white);
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-white);
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.cta-section .btn {
    background-color: var(--text-white);
    color: var(--accent-color);
}

.cta-section .btn:hover {
    background-color: var(--bg-light);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: var(--transition);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* Contact Section */
.contact-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-item svg {
    width: 24px;
    height: 24px;
    color: var(--accent-color);
    flex-shrink: 0;
    margin-top: 3px;
}

.contact-item h4 {
    font-size: 1.125rem;
    margin-bottom: 5px;
}

.contact-item p {
    margin-bottom: 0;
}

.map-container {
    margin-top: 30px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.map-container iframe {
    width: 100%;
    height: 300px;
    border: none;
}

/* Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
    aspect-ratio: 4/3;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(10, 35, 66, 0.8), transparent);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay h4 {
    color: var(--text-white);
    font-size: 1.125rem;
    margin-bottom: 5px;
}

.gallery-overlay p {
    color: var(--secondary-light);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 2rem;
    cursor: pointer;
    z-index: 2001;
}

/* Certificate Verification */
.verification-section {
    max-width: 600px;
    margin: 0 auto;
}

.verification-form {
    background-color: var(--bg-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.verification-result {
    margin-top: 30px;
    padding: 25px;
    border-radius: 12px;
    display: none;
}

.verification-result.success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    display: block;
}

.verification-result.error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    display: block;
}

.verification-result h3 {
    margin-bottom: 15px;
}

.verification-result.success h3 {
    color: #155724;
}

.verification-result.error h3 {
    color: #721c24;
}

.verification-details {
    margin-top: 15px;
}

.verification-details p {
    margin-bottom: 8px;
    color: var(--text-dark);
}

.verification-details strong {
    color: var(--primary-color);
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    background-color: #20bd5a;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: var(--text-white);
    padding: 60px 0 30px;
}

.footer-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-title {
    color: var(--text-white);
    font-size: 1.25rem;
    margin-bottom: 20px;
}

.footer-text {
    color: var(--secondary-light);
    line-height: 1.8;
}

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

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

.footer-links a {
    color: var(--secondary-light);
    transition: var(--transition);
    white-space: nowrap;
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

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

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    color: var(--secondary-light);
}

.footer-contact svg {
    color: var(--accent-color);
    flex-shrink: 0;
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    transition: var(--transition);
}

.footer-social a:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--primary-light);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--secondary-light);
    margin-bottom: 0;
}

/* Admin Panel Styles */
.admin-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 100vh;
}

.admin-sidebar {
    background-color: var(--primary-color);
    padding: 20px;
}

.admin-sidebar h2 {
    color: var(--text-white);
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.admin-nav {
    list-style: none;
}

.admin-nav li {
    margin-bottom: 10px;
}

.admin-nav a {
    display: block;
    padding: 12px 15px;
    color: var(--secondary-light);
    border-radius: 6px;
    transition: var(--transition);
}

.admin-nav a:hover,
.admin-nav a.active {
    background-color: var(--primary-light);
    color: var(--text-white);
}

.admin-content {
    padding: 30px;
    background-color: var(--bg-light);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.admin-card {
    background-color: var(--bg-white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.admin-table th,
.admin-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--primary-color);
}

.admin-table tr:hover {
    background-color: var(--bg-light);
}

.admin-actions {
    display: flex;
    gap: 10px;
}

.admin-actions .btn {
    padding: 6px 12px;
    font-size: 0.875rem;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.login-container h2 {
    text-align: center;
    margin-bottom: 30px;
}

/* Alert Messages */
.alert {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.alert-info {
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
    color: #0c5460;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-section {
        grid-template-columns: 1fr;
    }
    
    .contact-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .header-cta {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-text p {
        font-size: 1rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .course-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .course-item-content {
        flex-direction: column;
    }
    
    .course-item-left,
    .course-item-right {
        margin-left: 0;
        margin-right: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-wrapper {
        grid-template-columns: 1fr;
    }
    
    .admin-layout {
        grid-template-columns: 1fr;
    }
    
    .admin-sidebar {
        display: none;
    }
    
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.875rem;
    }
    
    .course-actions {
        flex-direction: column;
    }
    
    .verification-form {
        padding: 25px;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mt-4 { margin-top: 40px; }

.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mb-4 { margin-bottom: 40px; }

.pt-1 { padding-top: 10px; }
.pt-2 { padding-top: 20px; }
.pt-3 { padding-top: 30px; }
.pt-4 { padding-top: 40px; }

.pb-1 { padding-bottom: 10px; }
.pb-2 { padding-bottom: 20px; }
.pb-3 { padding-bottom: 30px; }
.pb-4 { padding-bottom: 40px; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

.hidden { display: none !important; }