/* ========================================
   DELHI HOME SERVICE - OPTIMIZED CSS
   Fast-loading, mobile-first design
   ======================================== */

/* CSS Variables for easy theming */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --whatsapp-color: #25D366;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --bg-gray: #f9fafb;
    --border-color: #e5e7eb;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2rem;
    color: var(--text-dark);
}

h2 {
    font-size: 1.75rem;
    color: var(--text-dark);
}

h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
}

h4 {
    font-size: 1.25rem;
    color: var(--text-dark);
}

p {
    margin-bottom: 1rem;
    color: var(--text-gray);
}

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

/* ========================================
   HEADER
   ======================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

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

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

.btn-whatsapp:hover {
    background: #1ea952;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 13rem 0;
    text-align: center;
}

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

.hero h1 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.hero-features {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

/* ========================================
   SERVICES SECTION
   ======================================== */
.services {
    padding: 4rem 0;
    background: var(--bg-gray);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-gray);
}

.service-category {
    margin: 3rem 0 1.5rem 0;
    padding: 0.75rem 1.5rem;
    background: var(--white);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    font-size: 1.5rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.service-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.service-card p {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.service-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: var(--transition);
}

.service-link:hover {
    gap: 0.5rem;
}

/* ========================================
   WHY CHOOSE US SECTION
   ======================================== */
.why-choose {
    padding: 4rem 0;
    background: var(--white);
}

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

.benefit-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-gray);
    border-radius: 12px;
    transition: var(--transition);
}

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

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.benefit-card p {
    font-size: 0.95rem;
    margin: 0;
}

/* ========================================
   SERVICE AREAS SECTION
   ======================================== */
.service-areas {
    padding: 4rem 0;
    background: var(--bg-gray);
}

.areas-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.area-tag {
    background: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    border: 2px solid var(--border-color);
    transition: var(--transition);
    cursor: default;
}

.area-tag:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.05);
}

.areas-note {
    text-align: center;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1.125rem;
}

/* ========================================
   REVIEWS SECTION
   ======================================== */
.reviews {
    padding: 4rem 0;
    background: var(--white);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.review-card {
    background: var(--bg-gray);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

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

.review-stars {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #fbbf24;
}

.review-text {
    font-style: italic;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.review-author {
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq {
    padding: 4rem 0;
    background: var(--bg-gray);
}

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

.faq-item {
    background: var(--white);
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-question h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary-color);
    transition: var(--transition);
}

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

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem 1.5rem;
    margin: 0;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ========================================
   FINAL CTA SECTION
   ======================================== */
.final-cta {
    padding: 4rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 0 1rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section li {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

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

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

.footer-section a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-contact {
    margin-top: 1rem;
}

.footer-contact a {
    color: var(--whatsapp-color);
    font-weight: 600;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin: 0;
}

/* ========================================
   STICKY WHATSAPP BUTTON
   ======================================== */
.whatsapp-sticky {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--whatsapp-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    z-index: 1000;
    transition: var(--transition);
    color: var(--white);
    animation: pulse 2s infinite;
}

.whatsapp-sticky:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.8);
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablets */
@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .service-category {
        font-size: 1.25rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 1.5rem;
    }
    
    .logo h2 {
        font-size: 1.25rem;
    }
    
    .header-cta .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .sections {
        padding: 3rem 0;
    }
    
    .cta-content h2 {
        font-size: 1.75rem;
    }
    
    .whatsapp-sticky {
        width: 55px;
        height: 55px;
        bottom: 15px;
        right: 15px;
    }
    
    .whatsapp-sticky svg {
        width: 28px;
        height: 28px;
    }
}

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

/* Print styles */
@media print {
    .header,
    .whatsapp-sticky,
    .hero-cta,
    .cta-buttons {
        display: none;
    }
}