/* Reset and 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: #212529;
    background-color: #F8F9FA;
}

/* Color Variables */
:root {
    --primary-50: #EBF5FF;
    --primary-500: #007AFF;
    --primary-700: #0059B8;
    --neutral-50: #F8F9FA;
    --neutral-100: #FFFFFF;
    --neutral-400: #CED4DA;
    --neutral-600: #6C757D;
    --neutral-900: #212529;
    --success: #28A745;
    --warning: #FFC107;
    --error: #DC3545;
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-xxl: 64px;
    --space-xxxl: 96px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    
    /* Shadows */
    --shadow-md: 0px 4px 12px rgba(0, 122, 255, 0.08);
    --shadow-lg: 0px 12px 32px rgba(0, 122, 255, 0.15);
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-sm);
}

/* Typography */
h1 {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--neutral-900);
}

h2 {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--neutral-900);
}

h3 {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--neutral-900);
}

p {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.6;
    color: var(--neutral-900);
}

/* Links */
a {
    color: var(--primary-500);
    text-decoration: none;
    transition: color 200ms ease-out;
}

a:hover {
    color: var(--primary-700);
    text-decoration: underline;
}

/* Contact links */
.contact-item a {
    color: var(--primary-500);
    font-weight: 500;
    text-decoration: none;
    transition: all 200ms ease-out;
    display: inline-block;
}

.contact-item a:hover {
    color: var(--primary-700);
    text-decoration: underline;
    transform: translateY(-1px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 250ms ease-out;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-500);
    color: var(--neutral-100);
}

.btn-primary:hover {
    background-color: var(--primary-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--neutral-900);
    border: 1px solid var(--neutral-400);
}

.btn-secondary:hover {
    background-color: var(--neutral-50);
}

.btn-large {
    padding: var(--space-lg) var(--space-xl);
    font-size: 18px;
}

.btn-full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(248, 249, 250, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--neutral-400);
    z-index: 1000;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-500);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--neutral-900);
    text-decoration: none;
    font-weight: 500;
    transition: color 200ms ease-out;
}

.nav-link:hover {
    color: var(--primary-500);
}

.nav-cta {
    display: none;
}

/* Hero Section */
.hero {
    padding: calc(var(--space-xxxl) + var(--space-xxl)) 0 var(--space-xxxl);
    text-align: center;
    background-color: var(--neutral-50);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--neutral-600);
    margin-bottom: var(--space-xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Sections */
.section {
    padding: var(--space-xxxl) 0;
}

.section-alt {
    background-color: var(--neutral-100);
}

.section-content {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xxl);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-description {
    font-size: 20px;
    color: var(--neutral-600);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.about-item {
    text-align: center;
    padding: var(--space-lg);
}

.about-icon {
    font-size: 48px;
    margin-bottom: var(--space-sm);
}

.about-item h3 {
    margin-bottom: var(--space-sm);
    color: var(--primary-500);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
}

/* Service Cards */
.service-card {
    background-color: var(--neutral-100);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: all 300ms cubic-bezier(0.25, 0.8, 0.25, 1);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-500);
}

.service-icon {
    color: var(--primary-500);
    margin-bottom: var(--space-sm);
}

.service-title {
    margin-bottom: var(--space-sm);
    color: var(--neutral-900);
}

.service-description {
    color: var(--neutral-600);
    font-size: 16px;
}

/* AI Description */
.ai-description {
    text-align: center;
    margin-bottom: var(--space-xl);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xxl);
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.contact-icon {
    color: var(--primary-500);
    margin-top: 4px;
    flex-shrink: 0;
}

.contact-item h3 {
    margin-bottom: var(--space-xs);
    color: var(--neutral-900);
}

.contact-item a {
    color: var(--primary-500);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-item p {
    color: var(--neutral-600);
    font-size: 16px;
}

/* Form */
.contact-form {
    background-color: var(--neutral-100);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    color: var(--neutral-900);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm);
    border: 1px solid var(--neutral-400);
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-family: inherit;
    background-color: var(--neutral-100);
    transition: border-color 200ms ease-out, box-shadow 200ms ease-out;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

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

/* Footer */
.footer {
    background-color: var(--neutral-900);
    color: var(--neutral-100);
    padding: var(--space-lg) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text p,
.footer-location p {
    color: var(--neutral-100);
    font-size: 14px;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    /* Typography adjustments */
    h1 {
        font-size: 40px;
    }
    
    h2 {
        font-size: 32px;
    }
    
    /* Navigation */
    .nav-menu {
        display: none;
    }
    
    .nav-cta {
        display: inline-flex;
    }
    
    /* Hero adjustments */
    .hero {
        padding: calc(var(--space-xxl) + var(--space-lg)) 0 var(--space-xl);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 300px;
    }
    
    /* Sections */
    .section {
        padding: var(--space-xxl) 0;
    }
    
    /* Grid adjustments */
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-description {
        font-size: 18px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: var(--space-md);
    }
}

/* Animation for scroll-reveal elements */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card,
.about-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth transitions for better UX */
* {
    transition: color 200ms ease-out, background-color 200ms ease-out;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Loading state for buttons */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Print styles */
@media print {
    .header,
    .hero-cta,
    .contact-form {
        display: none;
    }
    
    .section {
        page-break-inside: avoid;
    }
}