/* ===== CSS Variables ===== */
:root {
    --primary-color: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --text-color: #374151;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --bg-dark: #111827;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --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);
    --transition: all 0.3s ease;
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Inter', sans-serif;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-primary); color: var(--text-color); line-height: 1.6; overflow-x: hidden; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); color: var(--secondary-color); line-height: 1.2; font-weight: 700; }
.section-header { text-align: center; max-width: 800px; margin: 0 auto 60px; }
.section-subtitle { display: block; color: var(--primary-color); font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; font-size: 14px; margin-bottom: 12px; }
.section-title { font-size: 42px; margin-bottom: 16px; }
.section-description { color: var(--text-light); font-size: 18px; max-width: 700px; margin: 0 auto; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 28px; border-radius: var(--radius); font-weight: 600; font-size: 16px; transition: var(--transition); cursor: pointer; border: none; font-family: var(--font-primary); }
.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-secondary { background: white; color: var(--secondary-color); border: 2px solid var(--border-color); }
.btn-secondary:hover { border-color: var(--primary-color); color: var(--primary-color); }
.btn-next, .btn-prev { padding: 12px 24px; font-size: 15px; }
.btn-prev { background: var(--bg-light); color: var(--text-color); border: 1px solid var(--border-color); }
.btn-prev:hover { background: var(--border-color); }

/* ===== Top Bar ===== */
.top-bar { background: var(--bg-dark); color: white; padding: 10px 0; font-size: 14px; }
.top-bar-container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px; }
.top-bar-info { display: flex; gap: 20px; flex-wrap: wrap; }
.top-bar-info span { display: flex; align-items: center; gap: 6px; }
.top-bar-contact { display: flex; gap: 20px; }
.top-bar-contact a { display: flex; align-items: center; gap: 6px; opacity: 0.9; }
.top-bar-contact a:hover { opacity: 1; }

/* ===== Navigation ===== */
.navbar { position: fixed; top: 0; left: 0; width: 100%; padding: 20px 0; background: white; z-index: 1000; transition: var(--transition); border-bottom: 1px solid var(--border-color); }
.navbar.scrolled { padding: 15px 0; box-shadow: var(--shadow-md); }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 28px; font-weight: 800; color: var(--secondary-color); }
.logo span { color: var(--primary-color); }
.nav-menu { display: flex; gap: 30px; align-items: center; }
.nav-link { font-weight: 500; color: var(--text-color); position: relative; }
.nav-link:hover, .nav-link.active { color: var(--primary-color); }
.btn-nav { background: var(--primary-color); color: white; padding: 10px 20px; border-radius: var(--radius); }
.btn-nav:hover { background: var(--primary-dark); color: white; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; }
.hamburger { display: block; width: 24px; height: 2px; background: var(--secondary-color); position: relative; transition: var(--transition); }
.hamburger::before, .hamburger::after { content: ''; position: absolute; width: 24px; height: 2px; background: var(--secondary-color); transition: var(--transition); }
.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

/* ===== Hero Section ===== */
.hero { padding: 140px 0 0; background: linear-gradient(135deg, var(--bg-light) 0%, white 100%); }
.hero-container { text-align: center; max-width: 900px; margin: 0 auto; }
.hero-badge { display: inline-block; background: rgba(26, 86, 219, 0.1); color: var(--primary-color); padding: 8px 16px; border-radius: 50px; font-weight: 500; font-size: 14px; margin-bottom: 20px; }
.hero-title { font-size: 52px; margin-bottom: 20px; line-height: 1.1; }
.hero-subtitle { font-size: 20px; color: var(--text-light); margin-bottom: 30px; max-width: 700px; margin-left: auto; margin-right: auto; }
.hero-buttons { display: flex; gap: 15px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.hero-features { display: flex; gap: 30px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-feature { display: flex; align-items: center; gap: 8px; color: var(--text-light); font-size: 15px; }
.hero-feature i { color: var(--success-color); }
.hero-stats { background: var(--secondary-color); padding: 50px 0; margin-top: 60px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat-card { text-align: center; color: white; }
.stat-number { display: block; font-size: 48px; font-weight: 800; color: white; margin-bottom: 8px; }
.stat-label { font-size: 15px; opacity: 0.8; }

/* ===== Services Section ===== */
.services { padding: 100px 0; background: white; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.service-card { background: var(--bg-light); padding: 40px; border-radius: var(--radius-xl); border: 1px solid var(--border-color); transition: var(--transition); }
.service-card:hover { border-color: var(--primary-color); box-shadow: var(--shadow-lg); transform: translateY(-5px); }
.service-icon { width: 60px; height: 60px; background: var(--primary-color); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; margin-bottom: 24px; }
.service-icon i { font-size: 24px; color: white; }
.service-card h3 { font-size: 22px; margin-bottom: 12px; }
.service-card > p { color: var(--text-light); margin-bottom: 20px; }
.service-list { margin-bottom: 24px; }
.service-list li { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; color: var(--text-color); font-size: 15px; }
.service-list li i { color: var(--success-color); margin-top: 3px; flex-shrink: 0; }
.service-cta { color: var(--primary-color); font-weight: 600; display: inline-flex; align-items: center; gap: 8px; }
.service-cta:hover { gap: 12px; }

/* ===== Process Section ===== */
.process { padding: 100px 0; background: var(--bg-light); }
.process-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 60px; }
.process-step { display: flex; gap: 20px; }
.step-number { width: 50px; height: 50px; background: var(--primary-color); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; flex-shrink: 0; }
.step-content h3 { font-size: 18px; margin-bottom: 8px; }
.step-content p { color: var(--text-light); font-size: 15px; }
.process-cta { text-align: center; background: white; padding: 40px; border-radius: var(--radius-xl); border: 1px solid var(--border-color); }
.process-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(26, 86, 219, 0.1); color: var(--primary-color); padding: 8px 16px; border-radius: 50px; font-weight: 600; margin-bottom: 16px; }
.process-quote { font-size: 20px; font-style: italic; color: var(--secondary-color); margin-bottom: 10px; }
.process-note { color: var(--text-light); font-size: 15px; }

/* ===== Portfolio Section ===== */
.portfolio { padding: 100px 0; background: white; }
.portfolio-filter { display: flex; justify-content: center; gap: 10px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn { padding: 10px 20px; border: 1px solid var(--border-color); background: white; border-radius: 50px; font-weight: 500; cursor: pointer; transition: var(--transition); font-family: var(--font-primary); font-size: 15px; }
.filter-btn:hover, .filter-btn.active { background: var(--primary-color); border-color: var(--primary-color); color: white; }
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 50px; }
.portfolio-item { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-color); transition: var(--transition); }
.portfolio-item:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); }
.portfolio-image { position: relative; overflow: hidden; }
.portfolio-image img { width: 100%; height: 280px; object-fit: cover; transition: var(--transition); }
.portfolio-item:hover .portfolio-image img { transform: scale(1.05); }
.portfolio-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.9); display: flex; flex-direction: column; align-items: center; justify-content: center; opacity: 0; transition: var(--transition); padding: 20px; text-align: center; }
.portfolio-item:hover .portfolio-overlay { opacity: 1; }
.portfolio-category { background: var(--primary-color); color: white; padding: 4px 12px; border-radius: 50px; font-size: 12px; font-weight: 600; margin-bottom: 12px; text-transform: uppercase; }
.portfolio-overlay h3 { color: white; font-size: 20px; margin-bottom: 8px; }
.portfolio-overlay p { color: var(--text-lighter); font-size: 14px; }
.portfolio-info { padding: 20px; }
.portfolio-info h4 { font-size: 18px; margin-bottom: 4px; }
.portfolio-info span { color: var(--text-light); font-size: 14px; }
.portfolio-cta { text-align: center; }

/* ===== Why Choose Section ===== */
.why-choose { padding: 100px 0; background: var(--bg-light); }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin-bottom: 60px; }
.feature-card { background: white; padding: 35px; border-radius: var(--radius-xl); border: 1px solid var(--border-color); }
.feature-icon { width: 50px; height: 50px; background: var(--primary-color); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.feature-icon i { font-size: 22px; color: white; }
.feature-card h3 { font-size: 20px; margin-bottom: 12px; }
.feature-card p { color: var(--text-light); font-size: 15px; }
.why-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; background: var(--secondary-color); padding: 50px; border-radius: var(--radius-xl); text-align: center; }
.why-stat { color: white; }
.why-stat .stat-number { margin-bottom: 8px; }
.why-stat .stat-label { opacity: 0.8; font-size: 15px; }

/* ===== Testimonials Section ===== */
.testimonials { padding: 100px 0; background: white; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 40px; }
.testimonial-card { background: var(--bg-light); padding: 35px; border-radius: var(--radius-xl); border: 1px solid var(--border-color); }
.testimonial-rating { color: #fbbf24; margin-bottom: 16px; font-size: 16px; }
.testimonial-text { color: var(--text-color); font-size: 15px; line-height: 1.7; margin-bottom: 24px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 15px; }
.author-initials { width: 50px; height: 50px; background: var(--primary-color); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 18px; }
.author-info h4 { font-size: 16px; margin-bottom: 4px; }
.author-info span { color: var(--text-light); font-size: 14px; }
.testimonials-footer { text-align: center; color: var(--text-light); padding-top: 30px; border-top: 1px solid var(--border-color); }

/* ===== Contact Section ===== */
.contact { padding: 100px 0; background: var(--bg-light); }
.contact-wrapper { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; background: white; border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); }
.contact-info-side { background: var(--primary-color); color: white; padding: 50px; }
.contact-info-side h3 { color: white; font-size: 28px; margin-bottom: 15px; }
.contact-info-side > p { opacity: 0.9; margin-bottom: 30px; line-height: 1.7; }
.contact-details { margin-bottom: 30px; }
.contact-item { display: flex; gap: 15px; margin-bottom: 25px; }
.contact-item i { font-size: 20px; width: 45px; height: 45px; background: rgba(255, 255, 255, 0.2); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-item h4 { color: white; font-size: 16px; margin-bottom: 4px; font-family: var(--font-primary); font-weight: 600; }
.contact-item p { opacity: 0.95; font-size: 15px; }
.contact-item span { opacity: 0.7; font-size: 13px; }
.contact-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.badge { display: flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, 0.2); padding: 8px 14px; border-radius: 50px; font-size: 14px; }
.badge i { color: #86efac; }

/* Multi-Step Form */
.contact-form-side { padding: 50px; }
.form-progress { margin-bottom: 30px; }
.progress-bar { height: 4px; background: var(--border-color); border-radius: 2px; margin-bottom: 15px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary-color); width: 33%; transition: width 0.3s ease; }
.progress-steps { display: flex; justify-content: space-between; }
.progress-step { font-size: 13px; color: var(--text-light); font-weight: 500; }
.progress-step.active { color: var(--primary-color); }
.form-step { display: none; }
.form-step.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.form-step h3 { font-size: 20px; margin-bottom: 25px; color: var(--text-color); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--secondary-color); font-size: 15px; }
.form-group input[type="text"], .form-group input[type="email"], .form-group input[type="tel"], .form-group input[type="url"], .form-group textarea, .form-group select { width: 100%; padding: 12px 16px; border: 1px solid var(--border-color); border-radius: var(--radius); font-family: var(--font-primary); font-size: 15px; transition: var(--transition); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1); }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.radio-group { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.radio-card { cursor: pointer; }
.radio-card input { display: none; }
.radio-content { display: flex; align-items: center; gap: 12px; padding: 15px; border: 2px solid var(--border-color); border-radius: var(--radius); transition: var(--transition); }
.radio-card input:checked + .radio-content { border-color: var(--primary-color); background: rgba(26, 86, 219, 0.05); }
.radio-content i { font-size: 20px; color: var(--primary-color); }
.radio-group-horizontal { display: flex; gap: 20px; flex-wrap: wrap; }
.radio-option { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.radio-option input { accent-color: var(--primary-color); }
.checkbox-label { display: flex; align-items: flex-start; gap: 10px; cursor: pointer; font-weight: 400 !important; }
.checkbox-label input { margin-top: 3px; accent-color: var(--primary-color); }
.form-actions { display: flex; justify-content: space-between; gap: 15px; margin-top: 30px; padding-top: 25px; border-top: 1px solid var(--border-color); }

/* Success Message */
.form-success { text-align: center; padding: 40px 20px; }
.success-icon { width: 80px; height: 80px; background: #d1fae5; color: var(--success-color); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 25px; }
.success-icon i { font-size: 40px; }
.form-success h3 { font-size: 26px; margin-bottom: 15px; }
.form-success p { color: var(--text-light); margin-bottom: 10px; }
.success-note { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border-color); }

/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: white; padding: 60px 0 30px; }
.footer-top { display: grid; grid-template-columns: 1.5fr 2fr; gap: 50px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.1); margin-bottom: 30px; }
.footer-brand .logo { color: white; font-size: 28px; margin-bottom: 10px; display: inline-block; }
.footer-brand > p { opacity: 0.7; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 40px; height: 40px; background: rgba(255, 255, 255, 0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; transition: var(--transition); }
.footer-social a:hover { background: var(--primary-color); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.footer-column h4 { color: white; font-size: 16px; margin-bottom: 20px; font-family: var(--font-primary); }
.footer-column a { display: block; opacity: 0.7; margin-bottom: 12px; font-size: 15px; }
.footer-column a:hover { opacity: 1; color: var(--primary-light); }
.footer-bottom { padding-top: 20px; }
.footer-bottom-content { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-bottom p { opacity: 0.5; font-size: 14px; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { opacity: 0.5; font-size: 14px; }
.footer-legal a:hover { opacity: 1; }

/* ===== Back to Top ===== */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; background: var(--primary-color); border: none; border-radius: 50%; color: white; font-size: 18px; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); z-index: 999; box-shadow: var(--shadow-lg); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-5px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .services-grid, .process-steps, .portfolio-grid, .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid, .why-stats { grid-template-columns: repeat(2, 1fr); }
    .contact-wrapper { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .top-bar-container { flex-direction: column; text-align: center; }
    .top-bar-info, .top-bar-contact { justify-content: center; }
    .nav-toggle { display: block; }
    .nav-menu { position: fixed; top: 0; right: -100%; width: 80%; height: 100vh; background: white; flex-direction: column; padding: 80px 40px; box-shadow: var(--shadow-xl); transition: var(--transition); }
    .nav-menu.active { right: 0; }
    .hero-title { font-size: 36px; }
    .section-title { font-size: 32px; }
    .services-grid, .process-steps, .portfolio-grid, .testimonials-grid, .features-grid, .stats-grid, .why-stats { grid-template-columns: 1fr; }
    .form-group-row { grid-template-columns: 1fr; }
    .radio-group { grid-template-columns: 1fr; }
    .contact-info-side, .contact-form-side { padding: 30px; }
    .footer-links { grid-template-columns: 1fr; text-align: center; }
    .footer-bottom-content { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .hero-buttons { flex-direction: column; align-items: stretch; }
    .btn { width: 100%; }
    .portfolio-filter { flex-direction: column; align-items: stretch; }
    .filter-btn { width: 100%; }
    .form-actions { flex-direction: column; }
    .btn-prev, .btn-next { width: 100%; }
}