/* Advanced TechVision Pro Website Styles */
:root {
    /* Primary Color Palette - Professional Blue & Orange */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #f59e0b;
    --secondary-dark: #d97706;
    --secondary-light: #fbbf24;
    
    /* Neutral Colors */
    --dark-bg: #0f172a;
    --dark-secondary: #1e293b;
    --dark-tertiary: #334155;
    --light-bg: #f8fafc;
    --light-secondary: #f1f5f9;
    --white: #ffffff;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;
    
    /* Accent Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #06b6d4;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-dark: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-secondary) 100%);
    --gradient-light: linear-gradient(135deg, var(--light-bg) 0%, var(--white) 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', var(--font-primary);
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 80px 0;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.8rem; }
h4 { font-size: 1.4rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

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

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

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

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-header p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

.btn-login {
    background: transparent !important;
    color: var(--primary-color) !important;
    padding: 8px 16px !important;
    border: 2px solid var(--primary-color) !important;
    border-radius: var(--border-radius) !important;
    transition: all var(--transition-normal) !important;
}

.btn-login:hover {
    background: var(--primary-color) !important;
    color: var(--text-white) !important;
}

.btn-register {
    background: var(--gradient-primary) !important;
    color: var(--text-white) !important;
    padding: 8px 16px !important;
    border-radius: var(--border-radius) !important;
}



.btn-dashboard {
    background: var(--success) !important;
    color: var(--text-white) !important;
    padding: 8px 16px !important;
    border-radius: var(--border-radius) !important;
}

.btn-logout {
    background: var(--error) !important;
    color: var(--text-white) !important;
    padding: 8px 16px !important;
    border-radius: var(--border-radius) !important;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-dark);
    color: var(--text-white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
    filter: blur(1px);
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    opacity: 0.8;
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    margin-bottom: 24px;
    font-weight: 500;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 24px;
    line-height: 1.1;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 48px;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin: 48px 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.stat {
    text-align: center;
    padding: 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-normal);
}

.stat:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 12px;
    color: var(--secondary-color);
}

.stat h3 {
    font-size: 2.5rem;
    margin-bottom: 8px;
    color: var(--text-white);
}

.stat p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.hero-buttons {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--text-white);
    border-bottom: 2px solid var(--text-white);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* About Section */
.about {
    padding: var(--section-padding);
    background: var(--light-bg);
}

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

.about-image {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.about-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.about-image:hover .about-overlay {
    opacity: 1;
}

.about-image:hover .about-img {
    transform: scale(1.05);
}

.play-button {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.play-button:hover {
    transform: scale(1.1);
}

.play-button i {
    font-size: 2rem;
    color: white;
    margin-left: 4px;
}

.about-feature {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.about-feature:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.about-feature i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-top: 4px;
}

.about-feature h3 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.about-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.metric {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.metric h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

/* Services Section */
.services {
    padding: var(--section-padding);
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.service-card {
    padding: 40px 32px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.service-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.02);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-icon i {
    font-size: 2rem;
    color: var(--text-white);
}

.service-card h3 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.service-card p {
    margin-bottom: 24px;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    margin-bottom: 24px;
}

.service-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 24px;
}

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

.service-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    padding: 16px;
    background: var(--light-bg);
    border-radius: var(--border-radius);
}

/* Portfolio Section */
.portfolio {
    padding: var(--section-padding);
    background: var(--light-bg);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 24px;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 25px;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
}

.portfolio-item {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

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

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

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

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 0.9;
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-overlay i {
    font-size: 4rem;
    color: var(--text-white);
}

.portfolio-content {
    padding: 32px;
}

.portfolio-content h3 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.portfolio-tech {
    display: flex;
    gap: 8px;
    margin: 16px 0;
    flex-wrap: wrap;
}

.portfolio-tech span {
    padding: 4px 12px;
    background: var(--light-bg);
    border-radius: 15px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.portfolio-stats {
    display: flex;
    gap: 24px;
    margin-top: 20px;
}

.portfolio-stats .stat {
    text-align: center;
    background: none;
    padding: 0;
}

.portfolio-stats .stat strong {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Team Section */
.team {
    padding: var(--section-padding);
    background: var(--white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.team-member {
    text-align: center;
    padding: 40px 24px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.team-member:hover {
    transform: translateY(-5px);
}

.member-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 24px;
    border: 4px solid var(--primary-color);
    transition: transform var(--transition-normal);
}

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

.team-member:hover .member-avatar {
    transform: scale(1.05);
}

.member-role {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 16px;
}

.member-bio {
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.member-social {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.member-social a {
    width: 40px;
    height: 40px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

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

/* Testimonials Section */
.testimonials {
    padding: var(--section-padding);
    background: var(--light-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.testimonial-card {
    padding: 40px 32px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 32px;
    font-size: 4rem;
    color: var(--primary-color);
    font-family: serif;
}

.testimonial-rating {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
}

.testimonial-rating i {
    color: var(--secondary-color);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 24px;
    font-size: 1.1rem;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--primary-color);
}

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

.author-info h4 {
    margin-bottom: 4px;
    color: var(--text-primary);
}

.author-info span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Contact Section */
.contact {
    padding: var(--section-padding);
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--light-bg);
    border-radius: var(--border-radius);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.5rem;
    color: var(--text-white);
}

.contact-details h3 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-details p {
    margin-bottom: 4px;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-details span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-form-container {
    background: var(--light-bg);
    padding: 40px;
    border-radius: var(--border-radius-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 16px 48px 16px 16px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color var(--transition-normal);
    background: var(--white);
}

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

.form-group i {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

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

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    padding: 0;
}

.form-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 16px;
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--text-white);
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding: 60px 0 40px;
}

.footer-section h3 {
    margin-bottom: 24px;
    color: var(--text-white);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    margin-bottom: 32px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    transition: all var(--transition-normal);
}

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

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    background: none;
    padding: 0;
}

.footer-contact .contact-item i {
    color: var(--primary-color);
    width: 20px;
}

.footer-contact .contact-item span {
    color: rgba(255, 255, 255, 0.8);
}

.footer-certifications {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.cert-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
}

.cert-badge i {
    color: var(--secondary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: var(--text-white);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero h1 { font-size: 3rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .about-content { grid-template-columns: 1fr; }
    .contact-content { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .mobile-menu-toggle { display: block; }
    
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1.1rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    
    .services-grid,
    .portfolio-grid,
    .team-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 2rem; }
    .section-padding { padding: 60px 0; }
    
    .hero-stats { grid-template-columns: 1fr; }
    .portfolio-filter { flex-direction: column; align-items: center; }
    
    .contact-form-container { padding: 24px; }
    .form-group input { padding: 12px 40px 12px 12px; }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Smooth Scrolling Enhancement */
html {
    scroll-padding-top: 80px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 450px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-primary);
    font-size: 1.8rem;
}

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

.modal .form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color var(--transition-normal);
    background: var(--white);
}

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

.modal .form-group i {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.modal .btn {
    width: 100%;
    padding: 14px;
    margin-top: 16px;
    justify-content: center;
}

.close {
    position: absolute;
    top: 15px;
    right: 20px;
    color: var(--text-secondary);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-normal);
}

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

.modal-switch {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

.modal-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.modal-switch a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .modal-content {
        padding: 24px;
        width: 95%;
    }
    
    .modal-content h2 {
        font-size: 1.5rem;
    }
}