/* Modern Design System */
:root {
    /* Colors */
    --primary: #0f172a;
    --secondary: #1e293b;
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-main: #334155;
    --text-light: #64748b;
    --text-white: #f1f5f9;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --h1: 3.5rem;
    --h2: 2.5rem;
    --h3: 1.75rem;
    --body: 1rem;
    --small: 0.875rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--h1); }
h2 { font-size: var(--h2); }
h3 { font-size: var(--h3); }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-lg) 0;
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.flex {
    display: flex;
    gap: var(--spacing-sm);
}

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

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

/* Components */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

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

.btn-outline:hover {
    background-color: var(--accent);
    color: var(--text-white);
}

/* Header */
.header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav {
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 500;
    color: var(--secondary);
}

.nav-links a:hover {
    color: var(--accent);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--background) 0%, #e0f2fe 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    margin-bottom: var(--spacing-md);
    background: -webkit-linear-gradient(315deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

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

/* Services */
.services-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--surface);
    padding: var(--spacing-md);
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid #e2e8f0;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

/* Contact */
.contact {
    background-color: var(--secondary);
    color: var(--text-white);
}

.contact h2 {
    color: var(--text-white);
}

.contact-form {
    background: var(--surface);
    padding: var(--spacing-md);
    border-radius: 1rem;
    color: var(--text-main);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 0.5rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: 2px solid var(--accent);
    border-color: transparent;
}

/* Footer */
.footer {
    background-color: var(--primary);
    color: var(--text-white);
    padding: var(--spacing-md) 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --h1: 2.5rem;
        --h2: 2rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--surface);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .hero {
        text-align: center;
        padding-top: 120px;
    }

    .hero .container {
        flex-direction: column-reverse;
    }
    
    .hero-image {
        margin-bottom: var(--spacing-md);
    }
}