/* ========================================
   CSS Variables & Root Styles
======================================== */
:root {
    /* Primary Colors - Professional Tech Palette */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #0ea5e9;
    --accent-color: #06b6d4;
    
    /* Neutral Colors */
    --dark: #0f172a;
    --dark-gray: #1e293b;
    --medium-gray: #475569;
    --light-gray: #cbd5e1;
    --lighter-gray: #f1f5f9;
    --white: #ffffff;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #64748b;
    
    /* Spacing */
    --section-padding: 100px 0;
    --card-padding: 40px;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   Global Styles
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    background-color: var(--white);
}

html {
    scroll-behavior: smooth;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    color: var(--dark);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

section {
    position: relative;
}

/* ========================================
   Navigation
======================================== */
.navbar {
    padding: 20px 0;
    transition: all var(--transition-medium);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-family: 'Poppins', sans-serif;
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    padding: 8px 20px;
    margin: 0 5px;
    border-radius: 8px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.08);
}

.nav-link.btn-contact {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: 10px 24px;
    border-radius: 8px;
    margin-left: 15px;
}

.nav-link.btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.navbar-toggler {
    border: none;
    padding: 8px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* ========================================
   Hero Section
======================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(37,99,235,0.03)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 40px 0;
}

.hero-title {
    font-size: 62px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    color: var(--dark);
}

.highlight-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 580px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

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

.btn-outline-light:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.hero-stats {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-image {
    position: relative;
    z-index: 2;
}

.hero-image img {
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.scroll-indicator a {
    display: inline-block;
    color: var(--primary-color);
    font-size: 32px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-15px); }
    60% { transform: translateY(-8px); }
}

/* ========================================
   Section Common Styles
======================================== */
.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin-bottom: 16px;
    padding: 8px 20px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--dark);
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

/* ========================================
   About Section
======================================== */
.about-section {
    background-color: var(--white);
}

.about-image-wrapper {
    position: relative;
}

.about-image-wrapper img {
    border-radius: 20px;
    width: 100%;
    height: auto;
    object-fit: cover;
}

.about-badge {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 24px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 16px;
}

.about-badge i {
    font-size: 40px;
}

.about-badge h4 {
    font-size: 28px;
    font-weight: 800;
    margin: 0;
    color: var(--white);
}

.about-badge p {
    font-size: 14px;
    margin: 0;
    opacity: 0.95;
}

.about-features {
    margin-top: 40px;
}

.feature-item {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    align-items: flex-start;
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 28px;
    color: var(--primary-color);
}

.feature-content h5 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark);
}

.feature-content p {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0;
}

/* ========================================
   Services Section
======================================== */
.services-section {
    background: linear-gradient(180deg, var(--white) 0%, var(--lighter-gray) 100%);
}

.service-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-medium);
    height: 100%;
    border: 1px solid rgba(37, 99, 235, 0.08);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: transform var(--transition-medium);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-icon i {
    font-size: 36px;
    color: var(--white);
}

.service-card h4 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.service-card p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-features li {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.service-features li i {
    color: var(--primary-color);
    font-size: 12px;
}

/* ========================================
   Portfolio Section
======================================== */
.portfolio-section {
    background-color: var(--white);
}

.portfolio-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium);
    height: 100%;
}

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

.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 400px;
}

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

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

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.7));
    padding: 32px;
    transform: translateY(0);
    transition: all var(--transition-medium);
}

.portfolio-overlay h4 {
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.portfolio-overlay p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 16px;
}

.portfolio-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.portfolio-tags .tag {
    background-color: rgba(37, 99, 235, 0.2);
    color: var(--white);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ========================================
   Testimonials Section
======================================== */
.testimonials-section {
    background: linear-gradient(180deg, var(--lighter-gray) 0%, var(--white) 100%);
}

.testimonial-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium);
    height: 100%;
    border: 1px solid rgba(37, 99, 235, 0.08);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.testimonial-rating {
    margin-bottom: 20px;
}

.testimonial-rating i {
    color: #fbbf24;
    font-size: 18px;
    margin-right: 4px;
}

.testimonial-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

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

.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.author-avatar i {
    font-size: 24px;
    color: var(--white);
}

.author-info h5 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--dark);
}

.author-info p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
}

/* ========================================
   Contact Section
======================================== */
.contact-section {
    background-color: var(--lighter-gray);
}

.contact-info {
    background: var(--white);
    padding: 48px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    height: 100%;
}

.contact-info h3 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--dark);
}

.info-item {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    align-items: flex-start;
}

.info-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.info-icon i {
    font-size: 24px;
    color: var(--primary-color);
}

.info-content h5 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--dark);
}

.info-content p {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0;
}

.social-links {
    margin-top: 40px;
}

.social-links h5 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--dark);
}

.social-icons {
    display: flex;
    gap: 12px;
}

.social-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all var(--transition-fast);
}

.social-icon:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

.contact-form-wrapper {
    background: var(--white);
    padding: 48px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--light-gray);
    border-radius: 10px;
    font-size: 15px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    font-family: 'Inter', sans-serif;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

textarea.form-control {
    resize: vertical;
    min-height: 140px;
}

.form-message {
    margin-top: 20px;
    padding: 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    display: none;
}

.form-message.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
    display: block;
}

.form-message.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
    display: block;
}

/* ========================================
   Footer
======================================== */
.footer {
    background: linear-gradient(135deg, var(--dark), var(--dark-gray));
    color: var(--white);
    padding: 80px 0 0;
}

.footer-widget {
    margin-bottom: 40px;
}

.footer-brand {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-tagline {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
    font-weight: 500;
}

.footer-description {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--primary-light);
    transform: translateX(5px);
}

.newsletter-form {
    display: flex;
    margin-top: 16px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px 0 0 10px;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--white);
    font-size: 14px;
}

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

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    padding: 12px 20px;
    border: none;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    border-radius: 0 10px 10px 0;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.newsletter-form button:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.footer-bottom {
    margin-top: 60px;
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin: 0;
}

.footer-social {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    transform: translateY(-3px);
}

/* ========================================
   Back to Top Button
======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
    z-index: 1000;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.back-to-top.show {
    display: flex;
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 991px) {
    .hero-title {
        font-size: 48px;
    }
    
    .section-title {
        font-size: 38px;
    }
    
    .hero-stats {
        gap: 40px;
    }
    
    .stat-number {
        font-size: 40px;
    }
    
    .navbar-collapse {
        background-color: var(--white);
        padding: 20px;
        margin-top: 20px;
        border-radius: 12px;
        box-shadow: var(--shadow-md);
    }
    
    .nav-link.btn-contact {
        margin-left: 0;
        margin-top: 10px;
    }
}

@media (max-width: 767px) {
    .hero-title {
        font-size: 36px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 17px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 32px;
    }
    
    .stat-label {
        font-size: 14px;
    }
    
    .service-card,
    .contact-form-wrapper,
    .contact-info {
        padding: 32px;
    }
    
    .about-badge {
        padding: 16px 20px;
        bottom: 20px;
        right: 20px;
    }
    
    .about-badge h4 {
        font-size: 22px;
    }
    
    .portfolio-image {
        height: 300px;
    }
    
    .footer-social {
        justify-content: center;
        margin-top: 20px;
    }
}

@media (max-width: 575px) {
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-description {
        font-size: 16px;
    }
}