/* ========================================
   CSS CUSTOM PROPERTIES & BASE STYLES
   ======================================== */

:root {
    /* Colors */
    --primary: #3b5998;
    --primary-light: #6a7fb8;
    --primary-dark: #2a4073;
    --secondary: #f5f5f5;
    --accent: #c8a801;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --border: #e0e0e0;
    --white: #ffffff;
    --bg-light: #f9f9f9;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Font */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    --font-size-5xl: 3.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ========================================
   GLOBAL STYLES
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

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

/* ========================================
   LAYOUT UTILITIES
   ======================================== */

.max-width {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

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

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    gap: var(--spacing-sm);
    white-space: nowrap;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

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

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

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

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

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.fixed-top {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 5rem;
    padding: 0 var(--spacing-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: var(--spacing-lg);
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-brand {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.logo-sub {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-top: -0.25rem;
}

/* Desktop Navigation */
.nav-links-desktop {
    display: none;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.nav-buttons-desktop {
    display: none;
    gap: var(--spacing-sm);
}

/* Mobile Navigation */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-mobile {
    display: none;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-md);
    border-top: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.nav-mobile.active {
    display: flex;
    max-height: 500px;
}

.nav-link-mobile {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-link-mobile:hover {
    background-color: var(--secondary);
    color: var(--text-primary);
}

.nav-buttons-mobile {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

/* ========================================
   RESPONSIVE NAVIGATION
   ======================================== */

@media (min-width: 1024px) {
    .navbar {
        height: 5rem;
    }

    .nav-links-desktop {
        display: flex;
    }

    .nav-buttons-desktop {
        display: flex;
    }

    .menu-toggle {
        display: none;
    }

    .nav-mobile {
        display: none !important;
    }
}

/* ========================================
   HERO SECTION
   ======================================== */

.main-content {
    margin-top: 5rem;
}

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(26, 26, 26, 0.7) 50%, rgba(26, 26, 26, 0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--white);
    max-width: 50rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    background-color: rgba(59, 89, 152, 0.2);
    color: var(--white);
    font-weight: 500;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
    animation: fadeInDown 0.6s ease;
}

.hero-title {
    font-size: var(--font-size-5xl);
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
    animation: fadeInUp 0.6s ease 0.1s backwards;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    color: var(--white);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--accent);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn-lg {
        width: 100%;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        margin-top: var(--spacing-lg);
    }
}

/* ========================================
   SECTIONS
   ======================================== */

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    color: var(--primary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

/* Services Section */
.services-section {
    padding: var(--spacing-2xl) 0;
    background-color: rgba(245, 245, 245, 0.5);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.service-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: none;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* About Section */
.about-preview {
    padding: var(--spacing-2xl) 0;
}

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

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.experience-card {
    position: absolute;
    bottom: -2rem;
    right: -2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.experience-icon {
    width: 3rem;
    height: 3rem;
    background-color: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.experience-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
}

.experience-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.about-list {
    list-style: none;
    margin: var(--spacing-lg) 0;
    padding: 0;
}

.about-list li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .experience-card {
        position: static;
        margin-top: var(--spacing-lg);
    }
}

/* Journey Section */
.journey-section {
    position: relative;
    padding: var(--spacing-2xl) 0;
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
    overflow: hidden;
}

.journey-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(26, 26, 26, 0.8);
}

.journey-content {
    position: relative;
    z-index: 10;
}

.journey-plane {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

.journey-content h2 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.journey-content p {
    color: rgba(255, 255, 255, 0.8);
    max-width: 40rem;
    margin: 0 auto var(--spacing-lg);
}

.journey-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

/* Testimonials Section */
.testimonials-section {
    padding: var(--spacing-2xl) 0;
    background-color: rgba(245, 245, 245, 0.5);
}

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

.testimonial-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-xl);
}

.stars {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: rgba(59, 89, 152, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: 700;
}

.author-info {
    text-align: left;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-country {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* CTA Section */
.cta-section {
    background-color: var(--primary);
    color: var(--white);
    padding: var(--spacing-2xl) var(--spacing-md);
}

.cta-section h2 {
    color: var(--white);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.8);
    max-width: 40rem;
    margin: 0 auto var(--spacing-lg);
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background-color: var(--text-primary);
    color: var(--white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-md);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

.footer-brand {
    flex: 1;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo-icon {
    font-size: 1.5rem;
}

.footer-logo-brand {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--white);
}

.footer-logo-sub {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

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

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

.social-links a {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    transition: var(--transition);
}

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

.contact-list {
    list-style: none !important;
}

.contact-list li {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.contact-list strong {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    margin: 0;
}

.footer-legal {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

.footer-legal a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-bottom {
        flex-direction: column;
    }

    .footer-legal {
        flex-direction: column;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}