:root {
    --primary-blue: #2C5AA0;
    --primary-green: #28A745;
    --accent-green: #20C997;
    --light-green: #E8F5E9;
    --dark-blue: #1A3B72;
    --light-blue: #E3F2FD;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #E9ECEF;
    --dark-gray: #343A40;
    --text-gray: #6C757D;
    --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-green: 0 10px 25px rgba(40, 167, 69, 0.15);
    --shadow-blue: 0 10px 25px rgba(44, 90, 160, 0.15);
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--dark-gray);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark-blue);
}

h1 {
    font-size: 3.2rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.5rem;
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 2.5rem;
}

h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 70px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-green), var(--primary-blue));
    border-radius: 2px;
}

h2.center:after {
    left: 50%;
    transform: translateX(-50%);
}

h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

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

/* Header & Navigation */
.top-utility-bar {
    background-color: var(--white);
    padding: 12px 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--medium-gray);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}

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

.auth-links {
    display: flex;
    gap: 15px;
}

.auth-link {
    color: var(--dark-gray);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 50px;
    transition: all var(--transition);
    font-weight: 600;
    border: 1px solid transparent;
}

.auth-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.auth-link.register {
    background-color: var(--primary-green);
    color: var(--white);
    box-shadow: var(--shadow-green);
}

.auth-link.register:hover {
    background-color: #218838;
    box-shadow: 0 8px 20px rgba(40, 167, 69, 0.25);
}

.auth-link.login {
    border: 1px solid var(--primary-blue);
    color: var(--primary-blue);
}

.auth-link.login:hover {
    background-color: var(--light-blue);
}

.contact-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* Main Header */
.main-header {
    background-color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    box-shadow: var(--shadow-blue);
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--dark-blue);
}

.logo-text span {
    color: var(--primary-green);
}

.main-nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 600;
    font-size: 1.05rem;
    padding: 8px 0;
    position: relative;
    transition: color var(--transition);
}

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

.nav-link:hover {
    color: var(--primary-green);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(44, 90, 160, 0.03) 0%, rgba(40, 167, 69, 0.03) 100%);
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero:before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(44, 90, 160, 0.05) 0%, rgba(40, 167, 69, 0.05) 100%);
    top: -250px;
    right: -250px;
    z-index: 0;
}

.hero:after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.05) 0%, rgba(44, 90, 160, 0.05) 100%);
    bottom: -150px;
    left: -150px;
    z-index: 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    color: var(--dark-blue);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 16px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-green);
    color: white;
    box-shadow: var(--shadow-green);
}

.btn-primary:hover {
    background-color: #218838;
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(40, 167, 69, 0.2);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background-color: var(--light-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow-light);
}

.hero-visual {
    position: relative;
}

.visual-card {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--medium-gray);
    position: relative;
    overflow: hidden;
}

.visual-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, var(--primary-green), var(--primary-blue));
}

.stats-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    transition: transform var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background-color: var(--light-green);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-gray);
    font-weight: 500;
}

/* Content Sections */
.section {
    padding: 100px 0;
}

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

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2:after {
    left: 50%;
    transform: translateX(-50%);
}

/* Informational Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.info-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--medium-gray);
    opacity: 0;
    transform: translateY(30px);
}

.info-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.card-header {
    height: 200px;
    width: 100%;
    background-size: cover;
    background-position: center;
    position: relative;
}

.card-header:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(44, 90, 160, 0.1), rgba(40, 167, 69, 0.1));
}

.card-tag {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: var(--primary-green);
    color: white;
    padding: 8px 15px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    z-index: 2;
}

.card-content {
    padding: 30px;
}

.card-content h3 {
    margin-bottom: 1rem;
    color: var(--dark-blue);
}

/* How It Works */
.steps-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 50px;
}

.step {
    flex: 1;
    min-width: 250px;
    max-width: 280px;
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--medium-gray);
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.step.visible {
    opacity: 1;
    transform: translateY(0);
}

.step:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-green);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 25px;
    box-shadow: var(--shadow-green);
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Video Tutorials */
.videos-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.video-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--medium-gray);
    opacity: 0;
    transform: translateY(30px);
}

.video-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.video-thumbnail {
    height: 200px;
    width: 100%;
    background-color: var(--light-gray);
    background-size: cover;
    background-position: center;
    position: relative;
    cursor: pointer;
}

.video-thumbnail:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(44, 90, 160, 0.1), rgba(40, 167, 69, 0.1));
    transition: opacity var(--transition);
}

.video-thumbnail:hover:after {
    opacity: 0.5;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-green);
    z-index: 2;
    transition: all var(--transition);
    box-shadow: var(--shadow-medium);
}

.play-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background-color: var(--primary-green);
    color: white;
}

.video-info {
    padding: 25px;
}

.video-info h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 40px;
}

.contact-info-card {
    background-color: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--medium-gray);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateX(-30px);
}

.contact-info-card.visible {
    opacity: 1;
    transform: translateX(0);
}

.contact-info-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, var(--primary-green), var(--primary-blue));
}

.contact-details {
    margin-top: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    border-radius: var(--border-radius);
    transition: all var(--transition);
    background-color: var(--light-gray);
}

.contact-item:hover {
    background-color: var(--light-green);
    transform: translateX(5px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    color: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.2rem;
}

.contact-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--medium-gray);
    opacity: 0;
    transform: translateX(30px);
}

.contact-form.visible {
    opacity: 1;
    transform: translateX(0);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--dark-blue);
}

.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid var(--medium-gray);
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all var(--transition);
    background-color: var(--light-gray);
}

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

/* Footer */
.main-footer {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-column h3 {
    color: var(--white);
    font-size: 1.4rem;
    margin-bottom: 1.8rem;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition);
}

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

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

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
    transition: all var(--transition);
}

.social-icon:hover {
    background-color: var(--primary-green);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Animations for scroll-triggered content */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.stagger-delay-1 { transition-delay: 0.1s; }
.stagger-delay-2 { transition-delay: 0.2s; }
.stagger-delay-3 { transition-delay: 0.3s; }
.stagger-delay-4 { transition-delay: 0.4s; }

/* Responsive Design */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        z-index: 99;
        border-top: 1px solid var(--medium-gray);
    }
    
    .main-nav.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.4rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .utility-container {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .auth-links {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .contact-info {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .steps-container {
        flex-direction: column;
        align-items: center;
    }
    
    .step {
        max-width: 100%;
        width: 100%;
    }
}

@media (max-width: 576px) {
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .section {
        padding: 70px 0;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
}