/* Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #000000;
    --color-primary-dark: #333333;
    --color-text: #000000;
    --color-text-light: #555555;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f5;
    --color-border: #e0e0e0;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 300;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 300;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-dark);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 0;
    font-weight: 300;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-primary);
    transform: none;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--color-text);
    font-weight: 300;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0;
    transition: background-color 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

.nav-links a:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding-top: calc(72px + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(rgba(255,255,255,0.85), rgba(255,255,255,0.9)), url('../images/hero-bg.png');
    background-size: cover;
    background-position: center;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero .container {
    text-align: center;
}

.hero h1 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
}

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

.about-text p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.about-features {
    list-style: none;
    margin-top: var(--spacing-md);
}

.about-features li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.about-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* Services Section */
.services {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.15);
}

.service-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-light);
}

/* Contact Section */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

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

.contact-item h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.contact-item h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.contact-item p,
.contact-item a {
    font-size: 1.125rem;
}

.contact-email {
    display: inline-block;
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-primary);
    border-radius: 0;
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
}

.contact-email:hover {
    background-color: var(--color-primary);
    color: white;
}

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

.footer p {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        gap: 0;
    }

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

    .nav-links li {
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: var(--spacing-sm);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding-top: calc(72px + var(--spacing-lg));
        padding-bottom: var(--spacing-lg);
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    h2 {
        margin-bottom: var(--spacing-md);
    }
}

/* Scroll Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Hero animation on load */
.hero h1 {
    animation: fadeInUp 0.8s ease-out forwards;
}

.hero-subtitle {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.hero .btn {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}