/* ============================================
   GL Contractors - Professional Website Styles
   Color Palette: Navy Blue, Slate Gray, White
   Mobile-First Responsive Design
   WCAG 2.1 Level AA Compliant
   ============================================ */

/* ============================================
   CSS Variables & Reset
   ============================================ */

:root {
    /* Color Palette */
    --color-navy: #1a365d;
    --color-navy-dark: #0f2441;
    --color-navy-light: #2c5282;
    --color-slate: #475569;
    --color-slate-light: #64748b;
    --color-slate-lighter: #94a3b8;
    --color-white: #ffffff;
    --color-off-white: #f8fafc;
    --color-light-gray: #e2e8f0;
    --color-accent: #2563eb;
    --color-success: #059669;
    --color-error: #dc2626;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-slate);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover,
a:focus {
    color: var(--color-navy);
    outline: none;
}

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   Accessibility
   ============================================ */

.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 10000;
    opacity: 0;
}

.skip-link:focus {
    top: 0;
    opacity: 1;
}

.required {
    color: var(--color-error);
}

/* ============================================
   Layout Components
   ============================================ */

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

.section-padding {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-slate-light);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-primary);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-navy-dark);
    border-color: var(--color-navy-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--color-white);
    color: var(--color-navy);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.navbar {
    padding: var(--spacing-sm) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-navy);
    font-family: var(--font-display);
}

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

.logo:hover,
.logo:focus {
    color: var(--color-navy-light);
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-navy);
    border-radius: 3px;
    transition: var(--transition);
}

.nav-toggle:hover .hamburger,
.nav-toggle:focus .hamburger {
    background-color: var(--color-accent);
}

.nav-toggle:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-white);
    list-style: none;
    padding: var(--spacing-3xl) var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    transition: right 0.3s ease;
    overflow-y: auto;
}

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

.nav-menu li {
    margin-bottom: var(--spacing-md);
}

.nav-link {
    display: block;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-slate);
    padding: var(--spacing-xs) 0;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-accent);
    padding-left: var(--spacing-xs);
}

.nav-link-cta {
    color: var(--color-navy);
    font-weight: 700;
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    background-image: 
        linear-gradient(135deg, rgba(26, 54, 93, 0.95) 0%, rgba(15, 36, 65, 0.95) 100%),
        url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?w=1920&h=1080&fit=crop&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding-top: 80px;
    color: var(--color-white);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 36, 65, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.95);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

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

.badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.badge i {
    color: var(--color-accent);
    font-size: 1.25rem;
}

.badge span {
    font-weight: 500;
    font-size: 0.9rem;
}

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

.services {
    background-color: var(--color-off-white);
}

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

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    border-radius: var(--border-radius-lg);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.service-title {
    margin-bottom: var(--spacing-md);
}

.service-description {
    color: var(--color-slate-light);
    margin-bottom: var(--spacing-md);
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
    color: var(--color-slate);
}

.service-features i {
    color: var(--color-success);
    font-size: 0.875rem;
}

/* ============================================
   Process Section
   ============================================ */

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

.process-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    align-items: center;
}

.process-step {
    position: relative;
    background-color: var(--color-off-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: 800;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
}

.step-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin: var(--spacing-md) 0;
}

.step-title {
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--color-slate-light);
}

.process-arrow {
    color: var(--color-accent);
    font-size: 2rem;
    transform: rotate(90deg);
}

/* ============================================
   Portfolio Section
   ============================================ */

.portfolio {
    background-color: var(--color-off-white);
}

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

.portfolio-item {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    padding-bottom: 75%;
}

.portfolio-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(26, 54, 93, 0.95) 0%, transparent 100%);
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-lg);
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay,
.portfolio-item:focus-within .portfolio-overlay {
    opacity: 1;
}

.portfolio-content {
    color: var(--color-white);
}

.portfolio-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.portfolio-category {
    color: var(--color-light-gray);
    font-size: 0.9rem;
}

.portfolio-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.875rem;
    z-index: 2;
}

/* ============================================
   Testimonials Section
   ============================================ */

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

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

.testimonial-card {
    background-color: var(--color-off-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-accent);
}

.testimonial-rating {
    color: #fbbf24;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-slate);
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.author-name {
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: 0.25rem;
}

.author-project {
    font-size: 0.9rem;
    color: var(--color-slate-light);
}

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

.contact {
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    color: var(--color-white);
}

.contact .section-title,
.contact .section-subtitle {
    color: var(--color-white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.contact-info h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.contact-benefits {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.contact-benefits li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
}

.contact-benefits i {
    color: var(--color-accent);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-benefits strong {
    display: block;
    color: var(--color-white);
    margin-bottom: 0.25rem;
}

.contact-benefits p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin: 0;
}

.contact-details {
    background-color: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
}

.contact-details h3 {
    margin-bottom: var(--spacing-md);
}

.contact-details p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.contact-details i {
    color: var(--color-accent);
}

.contact-details a {
    color: var(--color-white);
}

.contact-details a:hover,
.contact-details a:focus {
    color: var(--color-accent);
}

/* ============================================
   Contact Form
   ============================================ */

.contact-form {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
    font-family: var(--font-primary);
    border: 2px solid var(--color-light-gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
    background-color: var(--color-white);
    color: var(--color-slate);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--color-error);
}

.error-message {
    display: block;
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    min-height: 20px;
}

.form-success {
    display: none;
    background-color: #d1fae5;
    color: var(--color-success);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-md);
    border: 2px solid var(--color-success);
}

.form-success.show {
    display: block;
}

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

.footer {
    background-color: var(--color-navy-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-section h3,
.footer-section h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.footer-section p {
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    border-radius: 50%;
    transition: var(--transition);
}

.social-link:hover,
.social-link:focus {
    background-color: var(--color-accent);
    color: var(--color-white);
    transform: translateY(-3px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--color-white);
    padding-left: var(--spacing-xs);
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-contact i {
    color: var(--color-accent);
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact a:hover,
.footer-contact a:focus {
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

/* ============================================
   Back to Top Button
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover,
.back-to-top:focus {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.back-to-top:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

/* ============================================
   Responsive Design - Tablet
   ============================================ */

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .nav-menu {
        position: static;
        width: auto;
        height: auto;
        flex-direction: row;
        display: flex;
        align-items: center;
        padding: 0;
        box-shadow: none;
        background-color: transparent;
    }
    
    .nav-menu li {
        margin-bottom: 0;
        margin-left: var(--spacing-md);
    }
    
    .nav-link {
        font-size: 1rem;
    }
    
    .nav-link:hover,
    .nav-link:focus {
        padding-left: 0;
    }
    
    .nav-toggle {
        display: none;
    }
    
    .hero-cta {
        flex-wrap: nowrap;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        flex-direction: row;
        justify-content: center;
        align-items: flex-start;
    }
    
    .process-arrow {
        margin-top: 80px;
        transform: rotate(0deg);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr 1.2fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Responsive Design - Desktop
   ============================================ */

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .header,
    .nav-toggle,
    .back-to-top,
    .hero-cta,
    .contact-form {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
    
    a {
        text-decoration: underline;
    }
}

/* ============================================
   High Contrast Mode
   ============================================ */

@media (prefers-contrast: high) {
    :root {
        --color-navy: #000066;
        --color-slate: #333333;
    }
    
    .btn {
        border-width: 3px;
    }
}

/* ============================================
   Reduced Motion
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}