/* --- CSS Variables --- */
:root {
    /* Colors */
    --color-primary-dark: #2C3E50; /* Deep Slate Blue */
    --color-primary-light: #4A6572; /* Softer Blue-Gray */
    --color-accent-main: #6C63FF; /* Vibrant Indigo-Blue */
    --color-accent-secondary: #00BCD4; /* Cyan */
    --color-text-dark: #333333;
    --color-text-light: #F4F7F6;
    --color-background-light: #F8F9FA;
    --color-background-mid: #E0E5E9;
    --color-background-dark: #1A202C; /* Near Black */
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-light) 100%);
    --gradient-dark-bg: linear-gradient(135deg, var(--color-background-dark) 0%, #2A3B4C 100%);
    --gradient-button-primary: linear-gradient(45deg, var(--color-accent-main), #8e44ad);
    --gradient-button-primary-hover: linear-gradient(45deg, #8e44ad, var(--color-accent-main));
    --gradient-card: linear-gradient(135deg, #FDFBFB, #EBEDEE);
    --gradient-card-hover: linear-gradient(135deg, #e7e9ed, #f3f5f8);


    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Montserrat', sans-serif;
    --font-size-base: 1rem; /* 16px */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Border Radius */
    --border-radius-sm: 0.4rem;
    --border-radius-md: 0.8rem;
    --border-radius-lg: 1.5rem;

    /* Box Shadows */
    --shadow-sm: 0 2px 4px var(--color-shadow);
    --shadow-md: 0 8px 16px var(--color-shadow);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* --- Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-background-light);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* --- Utility Classes --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xxl) 0;
}

.section-tag {
    display: inline-block;
    background: var(--color-accent-secondary);
    color: var(--color-text-light);
    padding: 0.4rem var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

.section-description {
    max-width: 700px;
    margin: var(--spacing-sm) auto var(--spacing-xl) auto;
    text-align: center;
    font-size: 1.15rem;
    line-height: 1.8;
    color: #555;
}

.text-light {
    color: var(--color-text-light) !important;
}

.bg-dark-gradient {
    background: var(--gradient-dark-bg);
    color: var(--color-text-light);
}

.bg-dark-gradient .section-tag {
    background: var(--color-accent-main);
}

.img-fluid {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary-dark);
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

h2 {
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-accent-main);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.9rem 2.2rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1.05rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    text-decoration: none; /* Ensure no underline */
}

.btn-primary {
    background: var(--gradient-button-primary);
    color: var(--color-text-light);
    border: none;
    background-size: 200% auto;
}

.btn-primary:hover {
    background-position: right center; /* Shift background for hover effect */
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-light);
    border: 2px solid var(--color-text-light);
    margin-left: var(--spacing-md);
}

.hero-section .btn-secondary {
    color: var(--color-text-light);
    border-color: var(--color-text-light);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent-secondary);
    color: var(--color-accent-secondary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

/* --- Header --- */
.main-header {
    background-color: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-md) 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease-in-out;
}

.main-header.sticky {
    background-color: var(--color-background-light);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-md);
}

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

.main-header .logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: -0.05em;
}

.main-header .logo a {
    color: inherit;
    text-decoration: none;
}

.main-nav ul {
    list-style: none;
    display: flex;
}

.main-nav ul li {
    margin-left: var(--spacing-xl);
}

.main-nav ul li a {
    color: var(--color-primary-dark);
    font-weight: 500;
    font-size: 1.05rem;
    position: relative;
    padding: 0.25rem 0;
}

.main-nav ul li a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-main);
    transition: width 0.3s ease;
}

.main-nav ul li a:hover::after,
.main-nav ul li a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary-dark);
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
}

/* Mobile Nav Open State */
body.nav-open .main-nav {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
}

body.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
body.nav-open .nav-toggle span:nth-child(2) {
    opacity: 1;
}
body.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--color-text-light);
    text-align: center;
    padding-top: 100px; /* Adjust for fixed header */
    min-height: 100vh;
}

.hero-visual {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4) grayscale(0.2); /* Darken and slightly desaturate */
    transform: scale(1.05); /* Slight zoom for subtle animation */
    transition: transform 0.5s ease-out;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    opacity: 0.85; /* Overlay for text readability */
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    animation: fadeInScale 1s ease-out forwards;
    opacity: 1;
    transform: translateY(20px);
}

.hero-actions {
    margin-top: var(--spacing-xl);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

@keyframes fadeInScale {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- About Section --- */
.about-section h2, .about-section .section-tag {
    text-align: left;
}
.about-section .section-description {
    text-align: left;
    margin-left: 0;
}

.grid-2-col-img {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.about-image {
    position: relative;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-lg);
    background: linear-gradient(145deg, var(--color-accent-main), var(--color-accent-secondary));
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius-md);
    transform: translate(-15px, -15px);
    transition: transform 0.3s ease;
}

.about-image:hover img {
    transform: translate(-5px, -5px);
}

.about-content h2 {
    text-align: left;
    margin-bottom: var(--spacing-md);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-lg) var(--spacing-md);
    background-color: var(--color-background-mid);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-item .icon-bulb, .feature-item .icon-globe {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-main);
    display: block;
    line-height: 1;
}

.feature-item h3 {
    font-size: 1.4rem;
    color: var(--color-primary-dark);
}

.feature-item p {
    font-size: 0.95rem;
    color: #666;
}

/* --- Programs Section --- */
.programs-section h2, .programs-section .section-tag, .programs-section .section-description {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.grid-3-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.category-card {
    background: var(--gradient-card);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(108, 99, 255, 0.1) 0%, transparent 70%);
    opacity: 1;
    transform: scale(0);
    transition: all 0.5s ease-out;
    z-index: 0;
}

.category-card:hover::before {
    opacity: 1;
    transform: scale(1);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    background: var(--gradient-card-hover);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-main);
    line-height: 1;
    position: relative;
    z-index: 1;
}
.card-icon span {
    display: block;
}

.category-card h3 {
    color: var(--color-primary-dark);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.category-card p {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.category-link {
    display: inline-flex;
    align-items: center;
    font-weight: 600;
    color: var(--color-accent-main);
    position: relative;
    z-index: 1;
}

.category-link:hover {
    color: var(--color-primary-dark);
}

.category-link .icon-arrow-right {
    margin-left: 0.5rem;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.category-link:hover .icon-arrow-right {
    transform: translateX(5px);
}

/* --- Why Us Section (Advantages) --- */
.advantages-grid {
    text-align: center;
    color: var(--color-text-light);
}

.advantage-card {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.advantage-card:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.advantage-card span {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-secondary);
    display: block;
    line-height: 1;
}

.advantage-card h3 {
    color: var(--color-text-light);
    font-size: 1.5rem;
}

.advantage-card p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* --- Testimonials Section --- */
.testimonials-section h2, .testimonials-section .section-tag, .testimonials-section .section-description {
    text-align: center;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.testimonial-item {
    background: var(--gradient-card);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.testimonial-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--spacing-md) auto;
    border: 3px solid var(--color-accent-main);
    box-shadow: var(--shadow-sm);
}

.testimonial-quote {
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: #444;
}

.testimonial-author {
    font-weight: 600;
    color: var(--color-primary-dark);
}

/* --- CTA Banner --- */
.cta-banner {
    background: var(--gradient-button-primary); /* Re-using gradient for aesthetic consistency */
    padding: var(--spacing-xxl) 0;
    text-align: center;
    color: var(--color-text-light);
    box-shadow: inset 0 5px 15px rgba(0,0,0,0.2);
}

.cta-banner h2 {
    font-size: 2.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.cta-banner p {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl) auto;
    font-size: 1.2rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

.cta-banner .btn-primary {
    background: var(--color-background-light); /* Reverse for contrast */
    color: var(--color-accent-main);
    box-shadow: var(--shadow-md);
    font-weight: 700;
}

.cta-banner .btn-primary:hover {
    background: var(--color-background-mid);
    color: var(--color-primary-dark);
}

/* --- Footer --- */
.main-footer {
    background-color: var(--color-background-dark);
    color: var(--color-text-light);
    padding: var(--spacing-xxl) 0 var(--spacing-md) 0;
    font-size: 0.95rem;
}

.main-footer .grid-footer {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text-light);
    letter-spacing: -0.05em;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-light);
    font-size: 1.2rem;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

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

.footer-links h3, .footer-contact-info h3, .footer-newsletter h3 {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

.footer-links ul, .footer-contact-info ul {
    list-style: none;
}

.footer-links ul li, .footer-contact-info ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-links ul li a, .footer-contact-info ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

.footer-links ul li a:hover, .footer-contact-info ul li a:hover {
    color: var(--color-accent-secondary);
}

.footer-newsletter p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
}

.footer-newsletter .btn-secondary {
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--color-text-light);
    margin-left: 0;
}

.footer-newsletter .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent-secondary);
    color: var(--color-accent-secondary);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: underline;
}

.footer-bottom a:hover {
    color: var(--color-accent-secondary);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 992px) {
    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 70%;
        height: 100%;
        background-color: var(--color-background-light);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.5s ease-in-out;
        z-index: 999;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
        text-align: center;
    }

    .main-nav ul li {
        margin: var(--spacing-md) 0;
        padding: var(--spacing-sm) 0;
        width: 100%;
    }

    .main-nav ul li a {
        font-size: 1.5rem;
        display: block;
        color: var(--color-primary-dark);
    }

    .nav-toggle {
        display: flex;
    }

    body.nav-open {
        overflow: hidden; /* Prevent scrolling when mobile nav is open */
    }

    .hero-content h1 {
        font-size: 2.8rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-actions .btn {
        width: 80%;
        max-width: 300px;
        margin-left: 0; /* Override margin for secondary button */
    }

    .grid-2-col-img {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    .about-image {
        order: -1; /* Image first on mobile */
    }
    .about-section h2, .about-section .section-tag {
        text-align: center;
    }
    .about-features {
        grid-template-columns: 1fr;
    }

    .grid-3-col {
        grid-template-columns: 1fr;
    }
    
    .footer-brand {
        text-align: center;
    }
    .footer-brand .social-links {
        justify-content: center;
        margin-top: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }
    h2 {
        font-size: 2rem;
    }
    h3 {
        font-size: 1.3rem;
    }
    .section-padding {
        padding: var(--spacing-xl) 0;
    }
    .section-description {
        font-size: 1rem;
    }
    .cta-banner h2 {
        font-size: 2rem;
    }
    .cta-banner p {
        font-size: 1rem;
    }
    .main-footer .grid-footer {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-links ul, .footer-contact-info ul {
        padding: 0;
        list-style: none;
    }
    .footer-links ul li, .footer-contact-info ul li {
        margin: 0;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    h2 {
        font-size: 1.6rem;
    }
    .btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.95rem;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .main-header .logo {
        font-size: 1.5rem;
    }
}


/* Visible state helpers */
+ .animate-fade-in-up.visible,
+ .animate-fade-in-left.visible,
+ .animate-fade-in-right.visible,
+ .animate-bounce-y.visible,
+ .section-scroll-animate.visible,
+ .text-animate-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Safe visibility overrides (auto-added) */
:root, html, body, main, header, footer, section, .container, .content {
  opacity: 1 !important;
  visibility: visible !important;
}