/* =========================================================================
   Vidyarthi Edusphere - Minimalist Professional Design System
   ========================================================================= */

   :root {
    /* Color Palette */
    --color-primary: #111827;       /* Deep Charcoal */
    --color-primary-light: #374151; /* Lighter Charcoal */
    --color-secondary: #6b7280;     /* Text Gray */
    --color-accent: #c2a878;        /* Muted Elegant Gold */
    --color-accent-hover: #ad9465;
    
    --bg-white: #ffffff;
    --bg-light: #f9fafb;            /* Off white/light gray */
    --bg-dark: #111827;             /* Dark section background */
    --color-border: #e5e7eb;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Spacing & Layout */
    --container-max: 1200px;
    --section-spacing: 6rem;
    --border-radius: 6px;
    --transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-primary-light);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

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

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.bg-light { background-color: var(--bg-light); }
.bg-dark { background-color: var(--bg-dark); }
.text-white { color: var(--bg-white); }
.text-white h2, .text-white h3, .text-white p { color: var(--bg-white); }
.text-center { text-align: center; }

/* =========================================================================
   Buttons
   ========================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    border: 1px solid transparent;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-primary);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background-color: var(--bg-light);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* =========================================================================
   Navigation
   ========================================================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-item {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-secondary);
    position: relative;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
    color: var(--color-primary);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: 0.3s;
}

/* =========================================================================
   Hero Section
   ========================================================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px; /* Offset for fixed header */
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.eyebrow {
    display: inline-block;
    color: var(--color-accent);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: 4.5rem;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.15rem;
    color: var(--color-secondary);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.hero-img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.image-wrapper:hover .hero-img {
    transform: scale(1.03);
}

.glass-layer {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    pointer-events: none;
    z-index: 2;
}

/* =========================================================================
   Services Section
   ========================================================================= */
.section-header {
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.section-header p {
    color: var(--color-secondary);
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-white);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
    border-color: transparent;
}

.service-icon {
    width: 50px;
    height: 50px;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.service-card p {
    color: var(--color-secondary);
    font-size: 0.95rem;
}

/* =========================================================================
   About Section
   ========================================================================= */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.rounded-img {
    border-radius: var(--border-radius);
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-content p {
    margin-bottom: 2rem;
    color: var(--color-secondary);
    font-size: 1.1rem;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 500;
    color: var(--color-primary);
}

.feature-list svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
}

/* =========================================================================
   Contact Section
   ========================================================================= */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-info .subtitle {
    color: #9ca3af;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item strong {
    display: block;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.contact-item p {
    color: #f9fafb;
}

/* Form */
.contact-form {
    background: #1f2937;
    padding: 3rem;
    border-radius: var(--border-radius);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #e5e7eb;
}

.form-group input {
    width: 100%;
    padding: 1rem;
    background: #374151;
    border: 1px solid #4b5563;
    border-radius: var(--border-radius);
    color: white;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: #4b5563;
}

/* =========================================================================
   Footer
   ========================================================================= */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 3rem 0;
    background: var(--bg-white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-secondary);
    font-size: 0.9rem;
}

.legal-links {
    display: flex;
    gap: 2rem;
}

.legal-links a:hover {
    color: var(--color-primary);
}

/* =========================================================================
   Animations (Fade Up)
   ========================================================================= */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in {
    opacity: 0;
    transition: opacity 1.2s ease-out;
}

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

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

/* =========================================================================
   Responsive Adjustments
   ========================================================================= */
@media (max-width: 992px) {
    .hero h1 { font-size: 3.5rem; }
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-actions { justify-content: center; }
    .hero-img { height: 400px; }
    .about-grid { grid-template-columns: 1fr; }
    .about-visual { order: 2; }
    .about-content { order: 1; }
    .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-sm);
        display: none;
    }
    
    .nav-links.active {
        display: flex;
    }

    .nav-item {
        padding: 1.5rem;
        border-top: 1px solid var(--bg-light);
        width: 100%;
        text-align: center;
    }

    .nav-actions { display: none; }
    .mobile-menu-btn { display: flex; }
    
    .hero h1 { font-size: 2.5rem; }
    .hero-actions { flex-direction: column; }
    .contact-form { padding: 2rem 1.5rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}