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

:root {
    /* Professional HVAC Color Palette */
    --primary-color: #1e40af;
    --primary-dark: #1e3a8a;
    --secondary-color: #0891b2;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Neutral Colors */
    --dark: #1f2937;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --white: #ffffff;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    
    /* Spacing */
    --section-padding: 80px 0;
    --container-padding: 0 20px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 16px;
}

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

p {
    margin-bottom: 16px;
    color: var(--gray-600);
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 16px;
}

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

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

.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);
    transform: translateY(-2px);
}

.cta-button, .service-btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
}

.cta-button:hover, .service-btn:hover {
    background-color: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.emergency-btn {
    background-color: var(--danger-color) !important;
    animation: pulse 2s infinite;
}

.emergency-btn:hover {
    background-color: #dc2626 !important;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2rem;
    color: var(--secondary-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin: 0;
}

.location {
    color: var(--accent-color);
    font-size: 0.9em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
    margin: 0;
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.header-cta .cta-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background-color: var(--success-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
}

.header-cta .cta-button:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.cta-label {
    font-size: 12px;
    opacity: 0.9;
}

.cta-number {
    font-size: 14px;
    font-weight: 700;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--gray-700);
    transition: 0.3s;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 58, 138, 0.1);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--white);
}

.highlight {
    color: var(--accent-color);
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
}

.feature-item i {
    color: var(--accent-color);
    font-size: 1.125rem;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image .hero-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.card-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 16px;
}

.hero-card h3 {
    color: var(--white);
    margin-bottom: 12px;
}

.hero-card p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.rating {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.stars {
    display: flex;
    gap: 2px;
}

.stars i {
    color: var(--accent-color);
    font-size: 14px;
}

.rating span {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 800px;
    margin: 0 auto;
}

/* Services Section */
.services {
    padding: var(--section-padding);
    background-color: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

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

.service-card.emergency {
    border: 2px solid var(--danger-color);
    position: relative;
}

.service-card.emergency::before {
    content: 'EMERGENCY';
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--danger-color);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    color: var(--white);
    font-size: 2rem;
}

.service-card h3 {
    color: var(--gray-900);
    margin-bottom: 16px;
    font-size: 1.25rem;
}

.service-card p {
    color: var(--gray-600);
    margin-bottom: 24px;
    line-height: 1.6;
}

/* About Section */
.about {
    padding: var(--section-padding);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text h2 {
    font-size: 2.25rem;
    margin-bottom: 24px;
    color: var(--gray-900);
}

.about-text p {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 20px;
    line-height: 1.7;
}

.about-features {
    margin-top: 40px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.about-feature i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 4px;
}

.about-feature h4 {
    color: var(--gray-900);
    margin-bottom: 8px;
}

.about-feature p {
    color: var(--gray-600);
    margin: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 1px solid var(--gray-200);
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-card p {
    color: var(--gray-600);
    font-weight: 500;
    margin: 0;
}

/* Process Section */
.process {
    padding: var(--section-padding);
    background-color: var(--gray-50);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step-content h3 {
    color: var(--gray-900);
    margin-bottom: 12px;
}

.step-content p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Why Choose Section */
.why-choose {
    padding: var(--section-padding);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    color: var(--gray-900);
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.6;
    margin: 0;
}

/* Testimonials Section */
.testimonials {
    padding: var(--section-padding);
    background-color: var(--gray-50);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.testimonial-stars i {
    color: var(--accent-color);
    font-size: 16px;
}

.testimonial-card p {
    color: var(--gray-700);
    font-style: italic;
    line-height: 1.6;
    margin-bottom: 20px;
}

.testimonial-author strong {
    color: var(--gray-900);
    display: block;
    margin-bottom: 4px;
}

.testimonial-author span {
    color: var(--gray-500);
    font-size: 14px;
}

/* Service Areas Section */
.service-areas {
    padding: var(--section-padding);
}

.areas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.area-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.area-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.area-card h3 {
    color: var(--gray-900);
    margin-bottom: 12px;
    font-size: 1.125rem;
}

.area-card p {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* FAQ Section */
.faq {
    padding: var(--section-padding);
    background-color: var(--gray-50);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    margin-bottom: 16px;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.faq-question {
    padding: 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: var(--gray-50);
}

.faq-question h3 {
    color: var(--gray-900);
    font-size: 1.125rem;
    margin: 0;
}

.faq-question i {
    color: var(--primary-color);
    font-size: 1.25rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 24px 24px;
    max-height: 200px;
}

.faq-answer p {
    color: var(--gray-600);
    line-height: 1.6;
    margin: 0;
}

/* Final CTA Section */
.final-cta {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: var(--white);
}

.cta-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.cta-text h2 {
    color: var(--white);
    font-size: 2.25rem;
    margin-bottom: 20px;
}

.cta-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: 32px;
    line-height: 1.7;
}

.cta-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.95);
}

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

.contact-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-card h3 {
    color: var(--white);
    margin-bottom: 24px;
    text-align: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-item i {
    color: var(--accent-color);
    font-size: 1.25rem;
    width: 20px;
}

.contact-label {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 4px;
}

.contact-value {
    color: var(--white);
    font-weight: 600;
}

.contact-value a {
    color: var(--white);
    text-decoration: none;
}

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

.cta-button-large {
    display: block;
    width: 100%;
    padding: 16px 24px;
    background-color: var(--success-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 700;
    text-align: center;
    margin-top: 24px;
    transition: all 0.3s ease;
}

.cta-button-large:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Footer */
.footer {
    background-color: var(--gray-900);
    color: var(--white);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.footer-logo h3 {
    color: var(--white);
    margin: 0;
}

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

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 20px;
}

.footer-contact {
    margin-top: 20px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.footer-contact-item i {
    color: var(--accent-color);
    width: 16px;
}

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

.footer-contact-item a:hover {
    color: var(--accent-color);
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 1.125rem;
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding: 20px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin: 0;
}

.footer-rating {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-rating .stars {
    display: flex;
    gap: 2px;
}

.footer-rating .stars i {
    color: var(--accent-color);
    font-size: 14px;
}

.footer-rating span {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* Utility Classes */
.highlight {
    color: var(--accent-color);
    font-weight: 600;
}

.text-center {
    text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }