:root {
    --primary-green: #4CAF50;
    --dark-green: #2E7D32;
    --light-green: #81C784;
    --soft-green: #E8F5E9;
    --white: #FFFFFF;
    --light-bg: #F1F8E9;
    --text: #263238;
    --gray-text: #546E7A;
    --transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --navbar-height: 80px; /* Define navbar height for spacing */

    /* Contact section specific variables (consistent with the rest of the design) */
    --contact-green-primary: #58ff78;
    --contact-green-dark: #29ff52;
    --contact-green-light: #c0ffcc;
    --contact-bg: #f8fff9;
    --contact-text-dark: #333333;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-bg);
    color: var(--text);
    line-height: 1.7;
    padding-top: var(--navbar-height); /* Prevent overlap with fixed navbar */
}

/* ============ NAVBAR ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(16px);
    box-shadow: 0 4px 30px rgba(0,0,0,0.05);
    transition: var(--transition);
    padding: 0.5rem 0;
    z-index: 1030;
}

.navbar.scrolled { 
    padding: 0.25rem 0; 
    background: rgba(255,255,255,0.98);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.navbar-brand { 
    font-weight: 800; 
    font-size: 1.8rem; 
    color: var(--dark-green) !important;
}
.navbar-brand span { 
    color: var(--primary-green); 
}

.nav-link {
    font-weight: 500;
    color: var(--text) !important;
    margin: 0 12px;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0 !important;
}
.nav-link:hover, 
.nav-link.active { 
    color: var(--primary-green) !important; 
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background: var(--primary-green);
    transition: var(--transition);
    transform: translateX(-50%);
}
.nav-link:hover::after, 
.nav-link.active::after { 
    width: 100%; 
}

/* ============ HERO CAROUSEL ============ */
.hero-carousel-wrapper {
    height: calc(100vh - var(--navbar-height));
    min-height: 600px;
    max-height: 900px;
    overflow: hidden;
}

.carousel-item {
    height: calc(100vh - var(--navbar-height));
    min-height: 600px;
}

.hero-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    transition: transform 8s ease;
}
.carousel-item.active .hero-bg { 
    transform: scale(1.08); 
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.4) 60%, transparent 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 500px;
    padding: 0 1.5rem;
}

/* Mobile Hero Adjustments */
@media (max-width: 992px) {
    .hero-content {
        text-align: center;
        margin: 0 auto;
        padding: 0 1rem;
    }
    .hero-content .display-3 {
        font-size: 2.8rem !important;
    }
    .hero-content .lead {
        font-size: 1.3rem !important;
    }
    .hero-content .btn {
        padding: 12px 28px !important;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .hero-carousel-wrapper,
    .carousel-item {
        min-height: 90vh;
    }
    .hero-content .display-3 {
        font-size: 2.4rem !important;
    }
    .hero-content br { 
        display: none; 
    }
    .hero-content .btn {
        display: block;
        width: 80%;
        margin: 10px auto;
    }
}

/* Animation */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.9s ease forwards;
}
.delay-1 { animation-delay: 0.3s; }
.delay-2 { animation-delay: 0.6s; }
@keyframes fadeInUp {
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* ============ BUTTONS ============ */
.btn-primary-custom {
    background: linear-gradient(135deg, var(--primary-green), var(--dark-green));
    border: none;
    padding: 14px 38px;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 8px 20px rgba(76,175,80,0.3);
    color: white;
}
.btn-primary-custom:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(76,175,80,0.4);
    color: white;
}

.btn-outline-custom {
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
    background: transparent;
    padding: 12px 34px;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}
.btn-outline-custom:hover {
    background: var(--primary-green);
    color: white;
    transform: translateY(-4px);
}

/* ============ SECTIONS & SPACING ============ */
section {
    padding: 100px 0;
}

#about {
    padding-top: 80px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--dark-green);
    position: relative;
    display: inline-block;
}
.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray-text);
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* ============ MOBILE OPTIMIZATIONS ============ */
@media (max-width: 768px) {
    section { 
        padding: 80px 0; 
    }
    #about { 
        padding-top: 60px; 
    }
    .section-title { 
        font-size: 2.3rem; 
    }
    .program-card, .resource-card, .blog-card, .contact-form, .contact-info {
        margin-bottom: 2rem;
    }
    .hero-content h1 {
        font-size: 2.6rem;
        line-height: 3.2rem;
    }
}

/* ============ OTHER ELEMENTS ============ */
.mission-box {
    background: #fff;
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.06);
    border-left: 8px solid var(--primary-green);
}

.program-card, .resource-card, .blog-card {
    transition: var(--transition);
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}
.program-card:hover, .resource-card:hover, .blog-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 45px rgba(76,175,80,0.15);
}

#backToTop {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 56px;
    height: 56px;
    background: var(--primary-green);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s ease;
    box-shadow: 0 8px 25px rgba(76,175,80,0.4);
}
#backToTop.show {
    opacity: 1;
    pointer-events: auto;
}
#backToTop:hover {
    transform: translateY(-6px);
    background: var(--dark-green);
}

.book-card {
    background: white;
    transition: transform 0.3s ease;
}
.book-card:hover {
    transform: translateY(-10px);
}

.book-cover-img {
    max-width: 300px;
    width: 100%;
    height: auto;
    border-radius: 12px;
}

@media (max-width: 768px) {
    .book-cover-wrapper {
        padding-bottom: 0 !important;
    }
}

/* ============ MOBILE NAVBAR ============ */
@media (max-width: 991px) {
    .navbar {
        background: #ffffff !important;
        backdrop-filter: none !important;
        box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
    }

    .navbar-collapse {
        background: #ffffff;
        margin-top: 0.75rem;
        padding: 1rem 1.25rem;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.12);
    }

    .navbar-nav {
        gap: 0.75rem;
    }

    .navbar-nav .nav-link {
        color: #2E7D32 !important;
        font-size: 1.05rem;
        padding: 0.75rem 0.5rem !important;
    }

    .navbar-nav .nav-link::after {
        display: none;
    }

    .navbar-toggler {
        border: none;
    }
}

/* ============ CONTACT SECTION (CORRECTED & INTEGRATED) ============ */
#contact {
    background-color: var(--contact-bg);
    padding: 100px 0; /* Match other sections */
}

#contact .section-title {
    font-size: 2.8rem; /* Consistent with other section titles */
    font-weight: 700;
    color: var(--dark-green);
}

#contact .section-subtitle {
    font-size: 1.2rem;
    color: var(--gray-text);
}

.contact-form .form-control {
    border-radius: 12px;
    border: 1px solid var(--light-green);
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    background-color: var(--white);
    font-family: inherit;
}

.contact-form .form-control:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 0.25rem rgba(76, 175, 80, 0.25);
    outline: none;
}

.contact-form textarea.form-control {
    min-height: 160px;
    resize: vertical;
}

.contact-form button {
    background: linear-gradient(135deg, var(--primary-green), var(--dark-green));
    color: var(--white);
    font-weight: 600;
    padding: 0.85rem 2.5rem;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 20px rgba(76,175,80,0.3);
}

.contact-form button:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(76,175,80,0.4);
}

.contact-info {
    background-color: var(--white);
    color: var(--text);
    padding: 3rem;
    border-radius: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 15px 40px rgba(0,0,0,0.06);
    border-left: 8px solid var(--primary-green);
}

.contact-info h5 {
    color: var(--dark-green);
    font-weight: 700;
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.contact-info h5 i {
    margin-right: 0.75rem;
    color: var(--primary-green);
}

.contact-info p {
    color: var(--text);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-info .social-icons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: auto;
}

.contact-info .social-icons a {
    background-color: var(--soft-green);
    color: var(--primary-green);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.contact-info .social-icons a:hover {
    background-color: var(--primary-green);
    color: white;
    transform: translateY(-5px);
}

.contact-info .social-icons a i {
    font-size: 1.5rem;
}