:root {
    /* Color Palette - Easy to customize */
    --primary-color: #2c3e50;    /* Dark Slate Blue */
    --secondary-color: #3498db;  /* Bright Blue */
    --accent-color: #e74c3c;     /* Red/Orange Accent */
    --text-color: #333333;       /* Dark Grey Text */
    --light-text: #7f8c8d;       /* Light Grey Text */
    --bg-color: #ffffff;         /* White Background */
    --bg-light: #f8f9fa;         /* Light Grey Background */
    --bg-dark: #1a252f;          /* Dark Footer/Section Background */
    --white: #ffffff;
    
    /* Spacing */
    --section-padding: 80px 0;
    --container-width: 1200px;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Playfair Display', serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 15px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    background-color: transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

.btn-nav {
    padding: 8px 20px;
    background-color: var(--primary-color);
    color: var(--white) !important;
    border-radius: 4px;
}

.btn-nav:hover {
    background-color: var(--secondary-color);
}

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

/* Hero Section */
.hero-section {
    padding-top: 140px; /* Account for fixed header */
    padding-bottom: 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.highlight {
    color: var(--secondary-color);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

.hero-image img {
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Section Utilities */
.section {
    padding: var(--section-padding);
}

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

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.text-center {
    text-align: center;
}

.text-white {
    color: var(--white);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 50px;
}

/* About Section */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image img {
    border-radius: 4px;
    box-shadow: 20px 20px 0 var(--secondary-color);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--light-text);
}

.about-text .lead {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 500;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

.stat-item h3 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

/* Expertise Section */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.expertise-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    text-align: center;
    transition: var(--transition);
    border: 1px solid #eee;
}

.expertise-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    border-color: var(--secondary-color);
}

.expertise-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 25px;
}

.expertise-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.expertise-card p {
    color: var(--light-text);
}

/* Articles/Blogs */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.card-content {
    padding: 25px;
}

.category {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--secondary-color);
    font-weight: 600;
    letter-spacing: 1px;
}

.card h3 {
    font-size: 1.4rem;
    margin: 10px 0;
}

.card p {
    color: var(--light-text);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    color: var(--secondary-color);
    gap: 10px;
}

/* Books Section */
.books-showcase {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-top: 50px;
}

.book-item {
    display: flex;
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    max-width: 800px;
    gap: 40px;
    align-items: center;
}

.book-cover {
    flex-shrink: 0;
    width: 200px;
}

.book-cover img {
    box-shadow: 5px 5px 15px rgba(0,0,0,0.2);
}

.book-info h3 {
    font-size: 2rem;
}

.book-info .author {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.book-info .description {
    color: var(--light-text);
    margin-bottom: 30px;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

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

.contact-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.contact-list i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    border-radius: 4px;
    color: var(--white);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    background: rgba(255,255,255,0.1);
}

/* Footer */
.footer {
    background-color: #151e26;
    color: #7f8c8d;
    padding: 40px 0;
}

.social-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-links a {
    color: #7f8c8d;
    font-size: 1.2rem;
}

.social-links a:hover {
    color: var(--white);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
        margin: 0 auto;
        max-width: 400px;
    }

    .about-container {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        margin: 0 auto;
    }
    
    .book-item {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        background-color: var(--white);
        flex-direction: column;
        justify-content: center;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: var(--transition);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .mobile-menu-btn {
        display: block;
        z-index: 1001;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}