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

/* Root Variables */
:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-light: #f5f5f5;
    --color-gray: #666666;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --container-max: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
}

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

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

a {
    color: inherit;
    text-decoration: none;
}

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-black);
    color: var(--color-white);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    min-height: 60px;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
}

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

.nav-menu a {
    transition: opacity 0.3s ease;
}

.nav-menu a:hover {
    opacity: 0.7;
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-white);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: calc(var(--spacing-xl) + 60px) var(--spacing-sm) var(--spacing-xl);
    text-align: center;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    width: 100%;
}

.hero h1 {
    margin-bottom: var(--spacing-sm);
}

.tagline {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 150px;
}

.btn-primary {
    background-color: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-white);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

/* Services Section */
.services {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background-color: var(--color-gray-light);
    padding: var(--spacing-md);
    text-align: center;
    border: 1px solid #e0e0e0;
}

.service-card h3 {
    color: var(--color-black);
}

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

/* About Section */
.about {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--color-black);
    color: var(--color-white);
}

.about-text {
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
}

.highlights {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.highlights li {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-white);
    font-weight: 600;
}

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

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
    text-align: center;
}

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

.contact-item strong {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-gray);
}

.contact-item a {
    color: var(--color-black);
    font-size: 1.1rem;
    transition: opacity 0.3s ease;
}

.contact-item a:hover {
    opacity: 0.7;
}

.contact-item span {
    font-size: 1.1rem;
}

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

.footer p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
}

.footer-contact {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.footer-contact a {
    transition: opacity 0.3s ease;
}

.footer-contact a:hover {
    opacity: 0.7;
}

.footer-contact .divider {
    opacity: 0.5;
}

/* Responsive Design */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero {
        min-height: 70vh;
    }
}

/* Mobile (< 768px) */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-black);
        flex-direction: column;
        padding: var(--spacing-sm);
        gap: 0;
        display: none;
    }

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

    .nav-menu li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

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

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

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .hero {
        min-height: 60vh;
        padding-top: calc(var(--spacing-lg) + 60px);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 250px;
    }

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

    .highlights {
        flex-direction: column;
        align-items: center;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .footer-contact {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .footer-contact .divider {
        display: none;
    }
}