:root {
    /* Color Palette */
    --primary-navy: #1a365d;
    --primary-teal: #0891b2;
    --primary-orange: #ea580c;
    --success-green: #10b981;
    --warning-amber: #f59e0b;
    --error-red: #ef4444;
    
    /* Neutral Colors */
    --neutral-white: #ffffff;
    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;
    
    /* Spacing System (8px base) */
    --space-1: 0.5rem;   /* 8px */
    --space-2: 1rem;     /* 16px */
    --space-3: 1.5rem;   /* 24px */
    --space-4: 2rem;     /* 32px */
    --space-6: 3rem;     /* 48px */
    --space-8: 4rem;     /* 64px */
    --space-12: 6rem;    /* 96px */
    --space-16: 8rem;    /* 128px */
    
    /* Typography */
    --font-system: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', Helvetica, Arial, sans-serif;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.7;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-medium: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

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

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

body {
    font-family: var(--font-system);
    line-height: var(--line-height-normal);
    color: var(--neutral-800);
    background-color: var(--neutral-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container System */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-2);
    }
}

/* Typography System */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-tight);
    color: var(--neutral-900);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
}

p {
    margin-bottom: var(--space-2);
    line-height: var(--line-height-normal);
}

/* Header and Navigation */
.header {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-teal));
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    padding: var(--space-2) 0;
}

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

.brand-name {
    color: var(--neutral-white);
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    margin: 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-1);
}

.nav-toggle span {
    width: 24px;
    height: 3px;
    background: var(--neutral-white);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 3px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-6);
}

.nav-link {
    color: var(--neutral-white);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-1) var(--space-2);
    border-radius: 6px;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-link:focus {
    outline: 2px solid var(--primary-orange);
    outline-offset: 2px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-navy);
        flex-direction: column;
        gap: 0;
        padding: var(--space-4);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-medium);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-link {
        padding: var(--space-3) var(--space-2);
        border-radius: 8px;
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-teal));
    color: var(--neutral-white);
    padding: var(--space-12) 0;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
    align-items: center;
}

.hero-content {
    animation: slideInLeft 0.8s ease-out;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    color: var(--neutral-white);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-6);
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    padding: var(--space-3) var(--space-6);
    background: var(--primary-orange);
    color: var(--neutral-white);
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-medium);
    animation: pulse 2s ease-in-out infinite;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: #dc2626;
}

.cta-button:focus {
    outline: 2px solid var(--neutral-white);
    outline-offset: 2px;
}

.hero-animation {
    position: relative;
    height: 300px;
    animation: slideInRight 0.8s ease-out;
}

.electric-pulse {
    width: 200px;
    height: 200px;
    border: 3px solid var(--primary-orange);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: electricPulse 3s ease-in-out infinite;
}

.electric-pulse::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150px;
    height: 150px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: electricPulse 3s ease-in-out 1s infinite reverse;
}

/* Highlights Section */
.highlights {
    padding: var(--space-12) 0;
    background: var(--neutral-50);
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.highlight-item {
    text-align: center;
    padding: var(--space-6);
    background: var(--neutral-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
    animation: fadeInUp 0.8s ease-out;
}

.highlight-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.highlight-item h3 {
    color: var(--primary-navy);
    margin-bottom: var(--space-3);
}

/* Main Article Section */
.main-article {
    padding: var(--space-12) 0;
    background: var(--neutral-white);
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: var(--line-height-relaxed);
}

.article-content h2 {
    color: var(--primary-navy);
    margin-bottom: var(--space-4);
    font-size: 2.25rem;
}

.article-content h3 {
    color: var(--primary-teal);
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}

.article-content h4 {
    color: var(--primary-navy);
    margin-top: var(--space-4);
    margin-bottom: var(--space-2);
}

.article-content p {
    margin-bottom: var(--space-4);
    color: var(--neutral-700);
}

/* Page Hero for Sub-pages */
.page-hero {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-teal));
    color: var(--neutral-white);
    padding: var(--space-8) 0;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-2);
    color: var(--neutral-white);
    animation: fadeInUp 0.8s ease-out;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* About Page Styles */
.about-content {
    padding: var(--space-12) 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
    align-items: start;
}

.content-text h2,
.content-text h3 {
    color: var(--primary-navy);
}

.content-features {
    background: var(--neutral-50);
    padding: var(--space-6);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-teal);
}

.timeline-item {
    position: relative;
    padding-left: var(--space-6);
    margin-bottom: var(--space-4);
}

.timeline-marker {
    position: absolute;
    left: 8px;
    top: 6px;
    width: 16px;
    height: 16px;
    background: var(--primary-orange);
    border-radius: 50%;
    border: 3px solid var(--neutral-white);
    box-shadow: var(--shadow-md);
}

.timeline-content h4 {
    color: var(--primary-navy);
    margin-bottom: var(--space-1);
}

.certifications {
    padding: var(--space-12) 0;
    background: var(--neutral-50);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.cert-item {
    background: var(--neutral-white);
    padding: var(--space-6);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
}

.cert-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.cert-item h3 {
    color: var(--primary-teal);
    margin-bottom: var(--space-3);
}

/* Services Page Styles */
.services-content {
    padding: var(--space-12) 0;
}

.services-grid {
    display: grid;
    gap: var(--space-8);
}

.service-card {
    background: var(--neutral-white);
    padding: var(--space-6);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-teal);
    transition: var(--transition-medium);
    animation: fadeInUp 0.8s ease-out;
}

.service-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--primary-orange);
}

.service-card h2 {
    color: var(--primary-navy);
    margin-bottom: var(--space-3);
}

.service-card ul {
    margin: var(--space-4) 0;
    padding-left: var(--space-4);
}

.service-card li {
    margin-bottom: var(--space-2);
    color: var(--neutral-700);
}

.service-duration {
    color: var(--primary-teal);
    font-weight: 600;
    font-style: italic;
    margin-top: var(--space-3);
}

.service-benefits {
    padding: var(--space-12) 0;
    background: var(--neutral-50);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.benefit-item {
    text-align: center;
    padding: var(--space-6);
    background: var(--neutral-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.benefit-item h3 {
    color: var(--primary-navy);
    margin-bottom: var(--space-3);
}

/* Projects Page Styles */
.projects-content {
    padding: var(--space-12) 0;
}

.projects-intro {
    text-align: center;
    margin-bottom: var(--space-12);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.projects-grid {
    display: grid;
    gap: var(--space-8);
}

.project-card {
    background: var(--neutral-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-medium);
    animation: fadeInUp 0.8s ease-out;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.project-header {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-teal));
    padding: var(--space-6);
    color: var(--neutral-white);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-header h2 {
    color: var(--neutral-white);
    margin: 0;
}

.project-tag {
    background: var(--primary-orange);
    padding: var(--space-1) var(--space-3);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.project-content {
    padding: var(--space-6);
}

.project-content h3 {
    color: var(--primary-navy);
    margin-top: var(--space-4);
    margin-bottom: var(--space-2);
}

.project-content h3:first-child {
    margin-top: 0;
}

.projects-summary {
    margin-top: var(--space-12);
    text-align: center;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
}

.stat-item {
    padding: var(--space-6);
    background: var(--neutral-50);
    border-radius: 12px;
}

.stat-item h3 {
    color: var(--primary-navy);
    margin-bottom: var(--space-3);
}

.projects-cta {
    padding: var(--space-12) 0;
    background: var(--neutral-50);
    text-align: center;
}

.projects-cta h2 {
    color: var(--primary-navy);
    margin-bottom: var(--space-4);
}

.projects-cta p {
    margin-bottom: var(--space-6);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: var(--neutral-700);
}

/* Contact Page Styles */
.contact-content {
    padding: var(--space-12) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

.contact-form {
    background: var(--neutral-white);
    padding: var(--space-6);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-1);
    color: var(--primary-navy);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-3);
    border: 2px solid var(--neutral-300);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-teal);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

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

.error-message {
    color: var(--error-red);
    font-size: 0.875rem;
    margin-top: var(--space-1);
    display: block;
}

.form-submit {
    background: var(--primary-orange);
    color: var(--neutral-white);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-medium);
    width: 100%;
}

.form-submit:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.form-submit:disabled {
    background: var(--neutral-400);
    cursor: not-allowed;
    transform: none;
}

.contact-info {
    background: var(--neutral-50);
    padding: var(--space-6);
    border-radius: 12px;
}

.contact-item {
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--neutral-200);
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.contact-item h3 {
    color: var(--primary-navy);
    margin-bottom: var(--space-2);
}

.contact-item a {
    color: var(--primary-teal);
    text-decoration: none;
    font-weight: 600;
}

.contact-item a:hover {
    text-decoration: underline;
}

.hours-info {
    background: var(--neutral-white);
    padding: var(--space-6);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-top: var(--space-6);
}

.hours-grid {
    display: grid;
    gap: var(--space-2);
}

.hours-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--neutral-200);
}

.hours-item:last-child {
    border-bottom: none;
}

.day {
    font-weight: 600;
    color: var(--primary-navy);
}

.time {
    color: var(--neutral-700);
}

.emergency-notice {
    background: linear-gradient(135deg, var(--error-red), #dc2626);
    color: var(--neutral-white);
    padding: var(--space-6);
    border-radius: 12px;
    margin-top: var(--space-8);
    text-align: center;
}

.emergency-notice h3 {
    color: var(--neutral-white);
    margin-bottom: var(--space-3);
}

.emergency-notice p {
    margin-bottom: var(--space-3);
}

.emergency-notice p:last-child {
    margin-bottom: 0;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-medium);
}

.modal.show {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--neutral-white);
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.8);
    transition: var(--transition-medium);
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    background: linear-gradient(135deg, var(--success-green), #059669);
    color: var(--neutral-white);
    padding: var(--space-6);
    border-radius: 12px 12px 0 0;
}

.modal-header h3 {
    color: var(--neutral-white);
    margin: 0;
}

.modal-body {
    padding: var(--space-6);
}

.modal-body p {
    margin-bottom: var(--space-4);
}

.modal-body a {
    color: var(--primary-teal);
    text-decoration: none;
    font-weight: 600;
}

.modal-body a:hover {
    text-decoration: underline;
}

.modal-footer {
    padding: 0 var(--space-6) var(--space-6);
}

.modal-close-btn {
    background: var(--primary-navy);
    color: var(--neutral-white);
    padding: var(--space-2) var(--space-6);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    width: 100%;
}

.modal-close-btn:hover {
    background: var(--primary-teal);
}

/* Footer */
.footer {
    background: var(--primary-navy);
    color: var(--neutral-white);
    padding: var(--space-8) 0;
}

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

.footer-info h3 {
    color: var(--neutral-white);
    margin-bottom: var(--space-2);
}

.footer-contact a {
    color: var(--primary-orange);
    text-decoration: none;
}

.footer-contact a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        text-align: center;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-12: 4rem;
        --space-8: 3rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .project-header {
        flex-direction: column;
        gap: var(--space-2);
        align-items: flex-start;
    }
    
    .benefits-grid,
    .cert-grid,
    .summary-stats {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes electricPulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.7;
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

/* Intersection Observer Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Focus Styles for Accessibility */
*:focus {
    outline: 2px solid var(--primary-orange);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-teal);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .cta-button,
    .hero-animation {
        display: none;
    }
    
    .hero {
        background: none;
        color: var(--neutral-900);
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}