/* ===================================
   IMPLEMONTATION.COM STYLES
   Clean, modern design with lemon yellow accent
   =================================== */

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

:root {
    /* Color Palette */
    --lemon-yellow: #FFD500;
    --bright-yellow: #FFF066;
    --dark-gray: #2B2D42;
    --white: #FFFFFF;
    --light-cream: #F8F6F0;
    --text-primary: #2B2D42;
    --text-secondary: #6B6B6B;
    --border-color: #E5E5E5;
    
    /* Typography */
    --font-family: 'Poppins', sans-serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

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

.highlight {
    color: var(--lemon-yellow);
    position: relative;
}

.highlight-text {
    background-color: rgba(255, 213, 0, 0.15);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    font-weight: 500;
}

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

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

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.25rem;
    transition: var(--transition);
}

.logo:hover {
    color: var(--lemon-yellow);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--lemon-yellow);
    background-color: rgba(255, 213, 0, 0.1);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

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

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--font-family);
}

.btn-primary {
    background-color: var(--lemon-yellow);
    color: var(--dark-gray);
}

.btn-primary:hover {
    background-color: var(--bright-yellow);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 213, 0, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--dark-gray);
}

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

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #FFFFFF 0%, #F8F6F0 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.illustration {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 12px;
}

/* ===================================
   PROBLEM SECTION
   =================================== */
.problem-section {
    background-color: var(--light-cream);
}

.section-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.problem-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    align-items: center;
}

.problem-image img {
    width: 100%;
    border-radius: 12px;
}

.problem-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.problem-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.problem-item i {
    color: #E63946;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.problem-item p {
    margin: 0;
    font-size: 1.05rem;
}

.problem-solution {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.problem-solution p {
    font-size: 1.15rem;
}

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

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

.service-card {
    background-color: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--lemon-yellow);
}

.service-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background-color: var(--light-cream);
}

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

.service-content {
    padding: var(--spacing-md);
}

.service-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-features {
    list-style: none;
    margin-top: var(--spacing-md);
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.service-features i {
    color: var(--lemon-yellow);
}

/* ===================================
   DIFFERENCE SECTION
   =================================== */
.difference-section {
    background-color: var(--light-cream);
}

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

.difference-card {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--white);
    border-radius: 12px;
    transition: var(--transition);
}

.difference-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
}

.difference-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background-color: rgba(255, 213, 0, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.difference-icon i {
    font-size: 2rem;
    color: var(--lemon-yellow);
}

.difference-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   PROJECTS SECTION
   =================================== */
.featured-projects {
    background-color: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--light-cream);
    border-radius: 12px;
    padding: var(--spacing-md);
    position: relative;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.project-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--lemon-yellow);
    color: var(--dark-gray);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.project-stats {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--border-color);
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--lemon-yellow);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ===================================
   ABOUT PREVIEW
   =================================== */
.about-preview {
    background-color: var(--light-cream);
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.david-illustration {
    width: 100%;
    max-width: 300px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.about-text .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.about-text p {
    font-size: 1.05rem;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   AUDIENCE SECTION
   =================================== */
.audience-section {
    background-color: var(--white);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.audience-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    padding: var(--spacing-md);
    background-color: var(--light-cream);
    border-radius: 8px;
}

.audience-item i {
    color: var(--lemon-yellow);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.audience-item p {
    margin: 0;
    font-size: 1.05rem;
}

/* ===================================
   TESTIMONIALS
   =================================== */
.testimonials-section {
    background-color: var(--light-cream);
}

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

.testimonial-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--lemon-yellow);
}

.avatar-illustration {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
}

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

/* ===================================
   NEWSLETTER SECTION
   =================================== */
.newsletter-section {
    background: linear-gradient(135deg, var(--lemon-yellow) 0%, var(--bright-yellow) 100%);
    padding: var(--spacing-xl) 0;
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-content h2 {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
}

.newsletter-content p {
    color: var(--dark-gray);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.newsletter-form input {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--dark-gray);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-family);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--dark-gray);
}

.newsletter-note {
    font-size: 0.875rem;
    color: var(--dark-gray);
    opacity: 0.8;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background-color: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 50px;
    height: 50px;
}

.footer-brand h3 {
    color: var(--lemon-yellow);
    margin: 0;
}

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

.footer-column h4 {
    color: var(--lemon-yellow);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--lemon-yellow);
}

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

.footer-bottom p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.7;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero-content,
    .problem-content,
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        order: -1;
    }
    
    .services-grid,
    .projects-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        justify-content: flex-start;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Smooth transitions for interactive elements */
a, button, .btn, .service-card, .project-card {
    transition: var(--transition);
}