/* Monochromatic Design System */
:root {
    --color-primary: #1a1a1a;
    --color-secondary: #2d2d2d;
    --color-tertiary: #404040;
    --color-light: #f5f5f5;
    --color-lighter: #ffffff;
    --color-dark: #0a0a0a;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-lighter);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.navbar {
    background-color: var(--color-lighter);
    border-bottom: 1px solid var(--color-light);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-menu a {
    color: var(--color-tertiary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-primary);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* Main Content */
main {
    flex: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-lighter) 0%, var(--color-light) 100%);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    line-height: 1.2;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--color-tertiary);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-lighter);
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
    font-weight: 700;
}

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

.service-card {
    background-color: var(--color-lighter);
    border: 1px solid var(--color-light);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--color-tertiary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Code Icon - Angular brackets */
.icon-code {
    border: 3px solid var(--color-primary);
    position: relative;
}

.icon-code::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border-top: 3px solid var(--color-primary);
    border-left: 3px solid var(--color-primary);
    top: 8px;
    left: 8px;
}

.icon-code::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border-bottom: 3px solid var(--color-primary);
    border-right: 3px solid var(--color-primary);
    bottom: 8px;
    right: 8px;
}

/* Design Icon - Grid pattern */
.icon-design {
    background-image: 
        linear-gradient(var(--color-primary) 2px, transparent 2px),
        linear-gradient(90deg, var(--color-primary) 2px, transparent 2px);
    background-size: 20px 20px;
    border: 2px solid var(--color-primary);
}

/* Venture Icon - Upward arrow */
.icon-venture {
    position: relative;
}

.icon-venture::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-left: 16px solid transparent;
    border-right: 16px solid transparent;
    border-bottom: 24px solid var(--color-primary);
    top: 8px;
}

.icon-venture::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 3px;
    background-color: var(--color-primary);
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
}

.service-card p {
    color: var(--color-tertiary);
    line-height: 1.7;
}

/* Page Header */
.page-header {
    padding: var(--spacing-lg) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-lighter) 0%, var(--color-light) 100%);
    border-bottom: 1px solid var(--color-light);
}

.page-header h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-tertiary);
    max-width: 700px;
    margin: 0 auto;
}

/* Content Section */
.content-section {
    padding: var(--spacing-xl) 0;
}

.content-block {
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.content-block h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
}

.content-block p {
    color: var(--color-tertiary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.feature-list {
    list-style: none;
    padding-left: 0;
    margin-top: var(--spacing-sm);
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-tertiary);
    line-height: 1.8;
}

.feature-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 600;
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h2,
.contact-form h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-weight: 600;
}

.contact-item {
    margin-bottom: var(--spacing-md);
}

.contact-item h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    font-weight: 600;
}

.contact-item p {
    color: var(--color-tertiary);
    font-size: 1.1rem;
}

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

.contact-item a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Form Styles */
.contact-form {
    background-color: var(--color-lighter);
    border: 1px solid var(--color-light);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--color-light);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-primary);
    background-color: var(--color-lighter);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

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

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

.footer p {
    color: var(--color-lighter);
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--color-lighter);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-light);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .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(7px, -6px);
    }

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

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

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

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}