:root {
    --primary-color: #0066cc;
    --secondary-color: #f8f9fa;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --text-color: #333;
    --bg-color: #ffffff;
    --border-color: #dee2e6;
}

[data-theme="dark"] {
    --primary-color: #4dabf7;
    --secondary-color: #495057;
    --text-color: #ffffff;
    --bg-color: #212529;
    --border-color: #495057;
    --light-color: #343a40;
    --dark-color: #f8f9fa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: all 0.3s ease;
}

/* Navigation Styles */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    background-color: var(--light-color) !important;
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
    font-size: 1.5rem;
    color: var(--primary-color) !important;
}

.nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004499 100%);
    color: white;
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-image {
    text-align: center;
    opacity: 0.8;
}

.hero-image i {
    color: rgba(255, 255, 255, 0.3);
}

/* Service Cards */
.service-card {
    border: none;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.2);
}

.service-icon {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
}

/* Contact Icons */
.contact-icon {
    width: 36px;
    height: 36px;
    color: var(--primary-color);
}

/* Button Styles */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Theme Toggle */
#themeToggle {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#themeIcon {
    width: 18px;
    height: 18px;
}

/* Modal Styles */
.modal-content {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
}

/* Form Styles */
.form-control {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.form-control:focus {
    background-color: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--text-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

.form-label {
    color: var(--text-color);
}

/* Sections */
section {
    background-color: var(--bg-color);
}

.bg-light {
    background-color: var(--light-color) !important;
}

/* Footer */
footer {
    background-color: var(--dark-color) !important;
}

/* Dark theme specific adjustments */
[data-theme="dark"] .navbar {
    background-color: var(--light-color) !important;
}

[data-theme="dark"] .bg-light {
    background-color: var(--light-color) !important;
}

[data-theme="dark"] .text-muted {
    color: #adb5bd !important;
}

[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 100px 0 60px;
        text-align: center;
    }
    
    .hero-image {
        margin-top: 30px;
    }
    
    .hero-image i {
        width: 200px !important;
        height: 200px !important;
    }
    
    .display-4 {
        font-size: 2rem;
    }
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

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

::-webkit-scrollbar-track {
    background: var(--secondary-color);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}