/* ===================================
   Stephens Engineering Group
   Hoare Lea-inspired Design System
   =================================== */

:root {
    /* Color Palette - Sophisticated & Refined */
    --color-primary: #1a1a1a;
    --color-secondary: #4a4a4a;
    --color-accent: #2c5f2d;
    --color-accent-light: #97b498;
    --color-background: #fafafa;
    --color-white: #ffffff;
    --color-border: #e0e0e0;
    --color-text-light: #6a6a6a;
    
    /* Typography */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

/* ===================================
   Base Styles
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

p {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-secondary);
}

/* ===================================
   Navigation
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition-medium);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo-main {
    font-size: 1.75rem;
    font-weight: 500;
    line-height: 1;
}

.logo-sub {
    font-family: var(--font-body);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-secondary);
    text-transform: uppercase;
}

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

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

.nav-menu a {
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--color-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    letter-spacing: 0.01em;
}

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

.contact-link {
    padding: 0.625rem 1.5rem;
    background: var(--color-primary);
    color: var(--color-white) !important;
    border-radius: 2px;
    transition: var(--transition-fast);
}

.contact-link:hover {
    background: var(--color-accent);
    transform: translateY(-1px);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

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

/* ===================================
   Hero Section
   =================================== */

.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    min-height: 90vh;
    padding-top: calc(80px + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.hero-content {
    animation: fadeInUp 1s ease forwards;
}

.hero-title {
    font-size: clamp(2.75rem, 5vw, 4.5rem);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    letter-spacing: 0.02em;
    border-radius: 2px;
    transition: var(--transition-medium);
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.hero-image {
    animation: fadeIn 1.2s ease forwards;
    animation-delay: 0.3s;
    opacity: 0;
}

.hero-image img {
    width: 100%;
    height: 500px;
    object-fit: contain;
    background: linear-gradient(135deg, #e8ebe8 0%, #d4d8d4 100%);
    border-radius: 2px;
    padding: 2rem;
}

.placeholder-image {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, #e8ebe8 0%, #d4d8d4 100%);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.placeholder-image::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
}

.solar-placeholder {
    background: linear-gradient(135deg, #f4a261 0%, #e76f51 100%);
    position: relative;
}

.solar-placeholder::after {
    content: '☀';
    font-size: 4rem;
    border: none;
    opacity: 0.3;
}

/* ===================================
   Section Styles
   =================================== */

.section-header {
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
}

.section-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2.25rem, 4vw, 3.5rem);
    font-weight: 300;
    color: var(--color-primary);
}

/* ===================================
   Services Section
   =================================== */

.services {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

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

.service-card {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    transition: var(--transition-medium);
    background: var(--color-background);
}

.service-card:hover {
    border-color: var(--color-accent-light);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.service-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

.service-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.service-list {
    list-style: none;
    padding-left: 0;
}

.service-list li {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ===================================
   Projects Section
   =================================== */

.projects {
    padding: var(--spacing-xxl) 0;
    background: var(--color-background);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.project-card {
    background: var(--color-white);
    border-radius: 2px;
    overflow: hidden;
    transition: var(--transition-medium);
    cursor: pointer;
}

.project-image {
    overflow: hidden;
    background: var(--color-white);
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
}

.project-card .placeholder-image {
    height: 300px;
    transition: var(--transition-slow);
}

.project-card:hover .placeholder-image {
    transform: scale(1.05);
}

.project-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-info {
    padding: var(--spacing-md);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-xs);
}

.project-description {
    font-size: 0.9375rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.project-meta {
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
    letter-spacing: 0.05em;
}

/* ===================================
   About Section
   =================================== */

.about {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-text {
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
}

.about-stats {
    display: grid;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-background);
    border-radius: 2px;
}

.stat-item {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--spacing-md);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 300;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--color-secondary);
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    padding: var(--spacing-xxl) 0;
    background: var(--color-background);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-text {
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
}

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

.contact-item {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-size: 1.125rem;
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.contact-value:hover {
    color: var(--color-accent);
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 2px;
    border: 1px solid var(--color-border);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-primary);
    background: var(--color-background);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-white);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ===================================
   Footer
   =================================== */

.footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-white);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    line-height: 1;
}

.footer-company {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.6);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ===================================
   Animations
   =================================== */

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 5rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding-top: calc(80px + var(--spacing-lg));
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container,
    .nav-container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
}