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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* ===== VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-light: #8b90ff;
    --primary-dark: #4f46e5;
    --secondary-color: #a855f7;
    --accent-color: #ec4899;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #a855f7 100%);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #1e293b;
    --border-color: #e2e8f0;
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-card: 0 4px 25px rgba(0, 0, 0, 0.08);
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 5rem 0;
    --element-spacing: 2rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

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

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-medium);
    font-size: 1rem;
}

.btn-primary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

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

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo {
    width: 40%;
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition-fast);
    position: relative;
}

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

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

.nav-toggle {
    display: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='40' cy='40' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    animation: float 25s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-white);
    margin-bottom: 1.5rem;
}

.hero-highlight {
    color: var(--text-white);
    display: block;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.6;
    max-width: 500px;
}

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

.hero-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}

.service-preview-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 1.5rem;
    padding: 2rem;
    text-align: center;
    transition: var(--transition-medium);
    animation: float 6s ease-in-out infinite;
}

.service-preview-card:nth-child(2) {
    animation-delay: 1s;
}

.service-preview-card:nth-child(3) {
    animation-delay: 2s;
    grid-column: 1 / -1;
    margin-top: 2rem;
}

.service-preview-card:nth-child(4) {
    animation-delay: 3s;
    grid-column: 1 / -1;
    margin-top: 1rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.service-preview-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.2);
}

.service-preview-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    color: white;
}

.service-preview-title {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0;
}

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

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

.about-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-light);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 2rem;
    box-shadow: var(--shadow-card);
    transition: var(--transition-medium);
    border: none;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-medium);
    z-index: 0;
}

.service-card:hover::before {
    opacity: 0.05;
}

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

.service-card > * {
    position: relative;
    z-index: 1;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #06b6d4, #3b82f6);
    border-radius: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-card:nth-child(2) .service-icon {
    background: linear-gradient(135deg, #8b5cf6, #a855f7);
}

.service-card:nth-child(3) .service-icon {
    background: linear-gradient(135deg, #ffb500, #da9c00);
}

.service-card:nth-child(4) .service-icon {
    background: linear-gradient(135deg, #f59e0b, #f97316);
}

.service-card:nth-child(5) .service-icon {
    background: linear-gradient(135deg, #ec4899, #f97316);
}

.service-card:nth-child(6) .service-icon {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

.service-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.service-description {
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.6;
    font-size: 0.95rem;
}

.service-features {
    display: none;
}

/* ===== PORTFOLIO SECTION ===== */
.portfolio {
    background: white;
}

.portfolio .section-title {
    color: var(--primary-color);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    grid-auto-rows: auto;
}

.portfolio-item {
    background: white;
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition-medium);
    opacity: 1;
    transform: scale(1);
    border: 1px solid var(--border-color);
}

.portfolio-item.large-item {
    grid-column: span 2;
}

.portfolio-item.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.portfolio-image {
    height: 250px;
    position: relative;
    overflow: hidden;
}

.large-item .portfolio-image {
    height: 300px;
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-medium);
}

.portfolio-item:hover .portfolio-img {
    transform: scale(1.05);
}

.portfolio-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 2;
}

.portfolio-placeholder {
    font-size: 3rem;
    color: white;
    opacity: 0.8;
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.portfolio-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.portfolio-tech {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.portfolio-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.portfolio-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
    text-decoration: none;
    font-size: 0.875rem;
}

.portfolio-link:hover {
    color: var(--primary-dark);
    transform: translateY(-1px);
}

/* ===== TEAM SECTION ===== */
.team {
    background: var(--bg-secondary);
    padding: 100px 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.team-member {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.team-member:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.team-image {
    margin-bottom: 25px;
    position: relative;
}

.member-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.team-member:hover .member-photo {
    transform: scale(1.05);
    border-color: var(--secondary-color);
}

.team-info h3.member-name {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.member-role {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 1rem;
    margin-bottom: 15px;
}

.member-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.member-skills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 25px;
}

.skill-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    opacity: 0.9;
}

.member-social {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.member-social .social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.member-social .social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .team-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-top: 40px;
    }
    
    .team-member {
        padding: 25px 20px;
    }
    
    .member-photo {
        width: 100px;
        height: 100px;
    }
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 100px 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
    margin-bottom: 60px;
}

.testimonial-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.testimonial-content {
    margin-bottom: 25px;
}

.quote-icon {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 15px;
    opacity: 0.7;
}

.stars {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
}

.stars i {
    color: #ffd700;
    font-size: 1.1rem;
}

.testimonial-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    font-style: italic;
    margin-bottom: 0;
}

.client-info {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.client-photo {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
}

.client-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.client-details p {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2px;
}

.client-details .company {
    color: var(--text-light);
    font-size: 0.8rem;
}

.stats-section {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-top: 60px;
    padding: 40px 0;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

@media (max-width: 1024px) {
    .stats-section {
        gap: 50px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 25px;
        margin-top: 40px;
    }
    
    .testimonial-card {
        padding: 25px;
    }
    
    .stats-section {
        flex-direction: column;
        gap: 30px;
        padding: 30px 20px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
}

/* ===== CONTACT SECTION ===== */
.contact {
    background: #2d3748;
    color: #ffffff;
    padding: 100px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    padding: 2rem 0;
}

.contact-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
}

.contact-description {
    color: #a0aec0;
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 3rem;
}

.contact-methods {
    margin-bottom: 3rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.method-icon {
    width: 50px;
    height: 50px;
    background: #4299e1;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.2rem;
}

.method-details h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.2rem;
}

.method-details p {
    color: #a0aec0;
    font-size: 0.95rem;
}

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

.action-btn {
    background: transparent;
    border: 2px solid #4a5568;
    color: #ffffff;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.action-btn.live-chat {
    background: #4299e1;
    border-color: #4299e1;
}

.action-btn:hover {
    background: #4299e1;
    border-color: #4299e1;
    transform: translateY(-2px);
}

.contact-form {
    background: #4a5568;
    padding: 2.5rem;
    border-radius: 15px;
    border: 1px solid #718096;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    color: #e2e8f0;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: #2d3748;
    border: 1px solid #4a5568;
    border-radius: 8px;
    color: #ffffff;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #718096;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #4299e1;
    background: #1a202c;
}

.submit-btn {
    width: 100%;
    background: #4299e1;
    color: #ffffff;
    border: none;
    padding: 15px 24px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 1rem;
}

.submit-btn:hover {
    background: #3182ce;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(66, 153, 225, 0.3);
}

@media (max-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .contact {
        padding: 80px 0;
    }
    
    .contact-title {
        font-size: 2rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .contact-actions {
        flex-direction: column;
    }
    
    .action-btn {
        justify-content: center;
    }
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: #9ca3af;
}

.footer-logo {
    width: 40px;
    height: 40px;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-section h4 {
    color: white;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #9ca3af;
    transition: var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: #9ca3af;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.25rem;
    box-shadow: var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem 0;
        box-shadow: var(--shadow-medium);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-medium);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-item.large-item {
        grid-column: span 1;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        text-align: center;
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .portfolio-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animation classes for JavaScript */
.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-left {
    animation: fadeInLeft 0.6s ease forwards;
}

.animate-right {
    animation: fadeInRight 0.6s ease forwards;
}

/* Loading state */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* Success/Error states */
.success {
    background: #10b981 !important;
    color: white !important;
}

.error {
    background: #ef4444 !important;
    color: white !important;
}