:root {
    --primary-color: #f7941d;
    --primary-dark: #e07f12;
    --secondary-color: #2c3e50;
    --light-bg: #f4f7fa;
    --text-dark: #333;
    --text-light: #666;
    --white: #ffffff;
    --font-main: 'Poppins', sans-serif;
    --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); color: var(--text-dark); line-height: 1.6; background-color: var(--white); }
h1, h2, h3, h4 { color: var(--secondary-color); line-height: 1.3; margin-bottom: 1rem; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.bg-light { background-color: var(--light-bg); }
.bg-primary { background-color: var(--secondary-color); }
.text-white { color: var(--white) !important; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 24px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}
.btn-large {
    padding: 14px 32px;
    font-size: 1.1rem;
}
.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}
.btn-outline {
    background-color: transparent;
    color: var(--secondary-color);
    border-color: var(--secondary-color);
}
.btn-outline:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}
.btn-text {
    background: transparent;
    color: var(--secondary-color);
    font-weight: 600;
    padding: 10px 15px;
}
.btn-text:hover {
    color: var(--primary-color);
}

/* Sections */
section {
    padding: 5rem 0;
}
.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}
.section-description {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 3rem;
}

/* Navbar */
.navbar {
    background: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}
.logo-sub {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary-color);
    margin-left: 10px;
    display: none;
}
@media (min-width: 768px) {
    .logo-sub { display: inline-block; }
}
.nav-links {
    display: flex;
    gap: 2rem;
}
.nav-links a {
    font-weight: 500;
    color: var(--secondary-color);
    transition: color 0.3s;
}
.nav-links a:hover {
    color: var(--primary-color);
}
.nav-buttons {
    display: flex;
    gap: 1rem;
}
.hamburger {
    display: none;
    font-size: 1.5rem;
    color: var(--secondary-color);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f4f7fa 0%, #eef2f7 100%);
    overflow: hidden;
}
.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}
.hero-text {
    flex: 1;
}
.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}
.hero-subtitle {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}
.hero-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}
.hero-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}
.stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--secondary-color);
    background: var(--white);
    padding: 8px 12px;
    border-radius: 5px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.stat i {
    color: var(--primary-color);
}
.stat span {
    font-weight: 700;
}
.hero-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}
.illustration-placeholder {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 8rem;
    box-shadow: 0 20px 40px rgba(247, 148, 29, 0.2);
    position: relative;
}

/* About Section */
.impact-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}
.impact-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: var(--transition);
}
.impact-card:hover {
    transform: translateY(-5px);
}
.impact-card h3 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}
.impact-card p {
    font-size: 1.2rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Benefits Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin-top: 3rem;
}
.feature-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.icon-wrapper {
    width: 60px;
    height: 60px;
    background: rgba(247, 148, 29, 0.1);
    color: var(--primary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}
.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}
.feature-card p {
    color: var(--text-light);
}

/* Subjects Section */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}
.subject-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 3rem 2rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}
.subject-card:hover {
    background: var(--white);
    color: var(--secondary-color);
}
.subject-card:hover h3, .subject-card:hover p, .subject-card:hover .subject-icon {
    color: var(--secondary-color);
}
.subject-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: 300;
    color: var(--primary-color);
}
.subject-card h3 {
    color: var(--white);
    margin-bottom: 1rem;
}
.subject-card p {
    color: rgba(255, 255, 255, 0.8);
}

/* How it Works */
.steps-container {
    margin-top: 4rem;
    position: relative;
}
.steps-container::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--light-bg);
    z-index: -1;
}
.step-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 3rem;
}
.step-number {
    width: 80px;
    height: 80px;
    background: var(--white);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    flex-shrink: 0;
    margin-right: 2rem;
    box-shadow: 0 5px 15px rgba(247, 148, 29, 0.2);
}
.step-content {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    flex-grow: 1;
}
.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    background: #1a252f;
    color: #aeb4b9;
    padding: 4rem 0 2rem;
}
.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}
.footer-info h2 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.social-links {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
}
.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}
.social-links a:hover {
    background: var(--primary-color);
}
.footer-links h3 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}
.footer-links li {
    margin-bottom: 0.8rem;
}
.footer-links a:hover {
    color: var(--primary-color);
}
.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    .hero-title {
        font-size: 2.8rem;
    }
    .hero-stats {
        justify-content: center;
    }
    .hero-cta {
        justify-content: center;
    }
    .impact-stats, .features-grid, .subjects-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .footer-container {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .nav-links, .nav-buttons {
        display: none;
    }
    .hamburger {
        display: block;
    }
    .steps-container::before {
        display: none;
    }
    .step-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .step-number {
        margin-right: 0;
        margin-bottom: 1.5rem;
    }
}