/* Reset and Base Styles */
:root {
    --primary-color: #212529; /* Charcoal Black */
    --secondary-color: #333333; /* Dark Gray */
    --accent-color: #f8f9fa; /* Light Gray Background */
    --text-color: #212529; /* Almost Black */
    --text-light: #6c757d; /* Muted Text */
    --white: #ffffff;
    --border-color: #dee2e6;
    --font-heading: 'Merriweather', serif;
    --font-body: 'Inter', sans-serif;
    --spacing-unit: 1rem;
    
    /* Dark Theme Colors for Contact Section */
    --dark-bg: #333333;
    --dark-input-bg: #444444;
    --dark-input-border: #555555;
    --dark-text: #e9ecef; /* Softer white */
    --dark-text-muted: #adb5bd;
    --light-gray-accent: #E0E0E0; /* Monochromatic Accent */
}

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

body {
    font-family: var(--font-body);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--secondary-color);
    margin-bottom: 1rem;
    line-height: 1.3;
}

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

a:hover {
    /* color: #495057; Lighter charcoal on hover */
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: #495057; /* Medium Gray */
    border-color: #495057;
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Header */
.site-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.logo .tagline {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    font-family: var(--font-body);
    font-weight: 400;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

.main-nav a:hover {
    color: var(--primary-color);
}

/* Specific override for button in nav to prevent link color conflict */
.main-nav .btn {
    color: var(--white);
}

.main-nav .btn:hover {
    color: var(--white);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    background-color: var(--white);
    text-align: center;
}

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

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.hero-sub {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-light {
    background-color: var(--white);
}

.section-gray {
    background-color: var(--accent-color);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Expertise List */
.feature-list li {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.feature-list strong {
    color: var(--secondary-color);
}

/* Case Studies */
.case-studies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.case-study {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.case-content {
    padding: 2rem;
}

.case-meta {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.tags li {
    background: var(--accent-color);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
    border: 1px solid var(--border-color);
}

/* CTA Section */
.cta-section {
    background-color: var(--secondary-color);
    color: var(--white);
    text-align: center;
    padding: 6rem 0;
    position: relative;
}

.cta-section h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--dark-text-muted);
    margin-bottom: 3rem;
    font-size: 1.2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Contact Form Styles */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    background-color: rgba(255, 255, 255, 0.05); /* Subtle glass effect */
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-text);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background-color: var(--dark-input-bg);
    border: 1px solid var(--dark-input-border);
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    color: var(--dark-text);
    transition: all 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--light-gray-accent);
    background-color: #555555;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

/* Custom Select Styling */
.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23e9ecef' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

.contact-form button {
    width: 100%;
    margin-top: 1rem;
    background-color: var(--light-gray-accent);
    color: #000000; /* Black text for contrast */
    border: none;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 1.25rem;
    transition: all 0.3s ease;
}

.contact-form button:hover {
    background-color: #fff;
    color: #000000; /* Ensure text stays black on white background */
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

/* Footer */
.site-footer {
    background-color: var(--white);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-brand h4 {
    margin-bottom: 0.25rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-light);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .main-nav {
        display: none; /* Add JS toggle later */
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 21px;
        z-index: 101;
    }

    .mobile-menu-toggle span {
        display: block;
        height: 3px;
        width: 100%;
        background-color: var(--secondary-color);
        border-radius: 3px;
        transition: all 0.3s ease;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--white);
        padding: 6rem 2rem;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 99;
    }

    .main-nav.active {
        right: 0;
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }

    .main-nav a {
        font-size: 1.25rem;
    }
}