/* ==========================================
   CSS VARIABLES - EASY TO CUSTOMIZE COLORS
   ========================================== */
:root {
    /* Primary Colors */
    --primary-color: #1e60ee;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    
    /* Secondary Colors */
    --secondary-color: #1e293b;
    --accent-color: #f59e0b;
    
    /* Neutral Colors */
    --text-dark: #1e293b;
    --text-medium: #475569;
    --text-light: #64748b;
    --white: #ffffff;
    --off-white: #f8fafc;
    --light-gray: #e2e8f0;
    --border-color: #cbd5e1;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
}

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

a:hover {
    color: var(--primary-dark);
}

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

ul {
    list-style: none;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    margin-bottom: 20px;
}

.section-divider.center {
    margin-left: auto;
    margin-right: auto;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-medium);
    max-width: 600px;
    margin: 0 auto 50px;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.btn-submit {
    width: 100%;
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    padding: 20px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: var(--white);
    box-shadow: var(--shadow-md);
    padding: 15px 0;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 3px;
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--white);
    transition: color var(--transition-fast);
}

.nav-logo img {
    height: 60px;
    width: auto;
    display: block;
    margin-top: 8px;
}

.navbar.scrolled .nav-logo {
    color: var(--text-dark);
}

.navbar.scrolled .nav-logo img {
    height: 40px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

.navbar.scrolled .nav-link {
    color: var(--text-medium);
}

.navbar.scrolled .nav-link:hover {
    color: var(--primary-color);
}

.nav-cta {
    background: var(--accent-color);
    color: var(--white) !important;
    padding: 10px 24px;
    border-radius: var(--radius-md);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: #e08900;
    color: var(--white);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--white);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background: var(--white);
    transition: all var(--transition-normal);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.navbar.scrolled .hamburger,
.navbar.scrolled .hamburger::before,
.navbar.scrolled .hamburger::after {
    background: var(--text-dark);
}

/* Back to top button */
/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;

    width: 40px;
    height: 40px;

    border: none;
    border-radius: 50%;

    background: var(--primary-color);
    color: white;

    cursor: pointer;
    box-shadow: var(--shadow-lg);

    opacity: 0;
    visibility: hidden;

    transform: translateY(10px);
    transition: all 0.3s ease;

    z-index: 999;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 0;

    appearance: none;
    -webkit-appearance: none;
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    display: block;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Overlay behind mobile menu */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    z-index: 999;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    position: relative;
    padding: 120px 20px 80px;
    text-align: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 50px 50px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.35rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.hero-languages {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-languages .separator {
    color: var(--accent-color);
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.about-image {
    position: relative;
    margin-top: 35px;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, var(--light-gray) 0%, #d1d5db 100%);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-text {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light);
    font-size: 1.2rem;
}

.profile-caption {
    text-align: center;
    margin-top: 15px;
}

.profile-caption h3 {
    margin-bottom: 5px;
}

.profile-caption p {
    color: var(--text-light);
}

.about-content {
    padding: 20px 0;
}

.about-text {
    font-size: 1.05rem;
    max-width: 70ch;
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-subsection {
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid var(--light-gray);
}

.subsection-title {
    font-size: 1.4rem;
    margin-bottom: 15px;
    font-family: 'Playfair Display', serif;
}

.translated-books {
    list-style: disc;
    padding-left: 20px;
    color: var(--text-medium);
}

.translated-books li {
    margin-bottom: 14px;
    line-height: 1.7;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 30px;
    padding-left: 60px;
    border-top: 1px solid var(--light-gray);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Playfair Display', serif;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================
   SERVICES SECTION
   ========================================== */
.services {
    background: var(--off-white);
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

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

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-icon {
    transition: transform 0.3s ease;
}

.service-card h3 {
    font-size: 1.35rem;
    margin-bottom: 15px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

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

.service-list {
    border-top: 1px solid var(--light-gray);
    padding-top: 20px;
}

.service-list li {
    padding: 8px 0;
    color: var(--text-medium);
    font-size: 0.9rem;
    position: relative;
    padding-left: 20px;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ==========================================
   CERTIFICATIONS SECTION
   ========================================== */
.certifications {
    background: var(--white);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.cert-card {
    text-align: center;
    padding: 40px 20px;
    background: var(--off-white);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.cert-badge {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-weight: 700;
    font-size: 1.2rem;
}

.cert-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.cert-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.cert-year {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 15px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact {
    background: var(--off-white);
}

.contact-grid {
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    margin-bottom: 5px;
}

.contact-item p,
.contact-item a {
    color: var(--text-medium);
    font-size: 0.95rem;
}

.contact-item a:hover {
    color: var(--primary-color);
}

/* ==========================================
   QUOTE SECTION
   ========================================== */
.quote {
    background: var(--white);
}

.quote-container {
    max-width: 800px;
    margin: 0 auto;
}

.quote-form {
    background: var(--off-white);
    padding: 50px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    margin-bottom: 25px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--white);
    transition: border-color var(--transition-fast);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23475569' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
}

.form-group input.valid,
.form-group select.valid,
.form-group textarea.valid {
    border-color: #22c55e;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--secondary-color);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 30px;
}

.footer-brand h3 {
    font-size: 1.75rem;
    color: var(--white);
    margin-bottom: 5px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: 35px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-copyright {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
}

.footer-copyright p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   GRID
   ========================================== */
.mosaic-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.mosaic-grid > * {
    grid-column: span 2;
}

/* Center the last two cards on the second row */
.mosaic-grid > *:nth-child(4) {
    grid-column: 2 / span 2;
}

.mosaic-grid > *:nth-child(5) {
    grid-column: 4 / span 2;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 1024px) {    
    .mosaic-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .mosaic-grid > * {
        grid-column: auto !important;
    }

    .about-grid {
        gap: 40px;
    }

    .about-stats {
        padding-left: 30px;
    }    
}

@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle {
        display: block;
        z-index: 1001;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu .nav-link {
        color: var(--text-dark);
        font-size: 1.2rem;
    }
    
    .nav-toggle.active .hamburger {
        background: transparent;
    }
    
    .nav-toggle.active .hamburger::before {
        transform: rotate(45deg);
        top: 0;
    }
    
    .nav-toggle.active .hamburger::after {
        transform: rotate(-45deg);
        bottom: 0;
    }
    
    /* Hero */
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    /* About */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        max-width: 350px;
        margin: 0 auto;
    }
    
    .about-stats {
        justify-content: space-around;
        padding-left: 0px;
    }
    
    /* Contact */
    .contact-info {
    grid-template-columns: 1fr;
    }
    
    /* Quote Form */
    .quote-form {
        padding: 30px 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* Section Titles */
    .section-title {
        font-size: 2rem;
    }
    
    .section {
        padding: 70px 0;
    }

    /* Grid */
    .mosaic-grid {
        grid-template-columns: 1fr;
    }

    .mosaic-grid > * {
        grid-column: auto !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-languages {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-languages .separator {
        transform: rotate(90deg);
    }
    
    .about-stats {
        flex-direction: column;
        gap: 25px;
        padding-left: 0px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeInUp 1s ease;
}

/* Scroll animations (activated via JavaScript) */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==========================================
   KEYBOARD ACCESSIBILITY
   ========================================== */
a:focus-visible,

button:focus-visible,

input:focus-visible,

select:focus-visible,

textarea:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 3px;
}