/* London Home Surveys - Main Stylesheet */
/* Modern, SEO-optimized design with Core Web Vitals optimization */

:root {
    --primary-color: #1a365d;
    --secondary-color: #2c5282;
    --accent-color: #d4af37;
    --text-dark: #1a202c;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    line-height: 1.7;
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1.5rem;
}

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

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: 1.2rem;
    font-size: 1.0625rem;
    color: var(--text-dark);
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

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

/* Header & Navigation */
.header {
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #3b6db5 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-menu a {
    color: var(--white);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.5rem 0;
    position: relative;
}

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

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a.active {
    color: var(--accent-color);
}

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

.mobile-toggle span {
    width: 28px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 25%, #3b6db5 50%, #4a8cd4 75%, #5ba3e8 100%);
    color: var(--white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/london-victorian-houses.jpg') center/cover no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.hero-content {
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    z-index: 1;
}

.hero-text h1 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.hero-text p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.0625rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    background: #c29d2f;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(212, 175, 55, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.btn-outline {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(26, 54, 93, 0.3);
}

/* Form Container in Hero */
.hero-form {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.hero-form h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

/* Container Layouts */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

.section {
    padding: 5rem 0;
}

.section-light {
    background: var(--bg-light);
}

/* Page Header Section - Colorful */
.page-header-section {
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 25%, #3b6db5 50%, #4a8cd4 75%, #5ba3e8 100%);
    padding: 5rem 2rem;
}

.page-header-section .section-title h1 {
    color: var(--white);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
}

.page-header-section .section-title p {
    color: var(--white);
    font-size: 1.25rem;
}

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

.section-title h2 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.section-title p {
    font-size: 1.125rem;
    color: var(--secondary-color);
    max-width: 700px;
    margin: 0 auto;
    font-weight: 500;
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: 2.5rem;
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Card Components */
.card {
    background: linear-gradient(135deg, #f0fff4 0%, #e6f9f0 50%, #dcf4e8 100%);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    height: 100%;
    border: 2px solid #d0f0e0;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(72, 187, 120, 0.2);
    background: linear-gradient(135deg, #e6f9f0 0%, #d0f0e0 50%, #bae8d0 100%);
}

.card-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.card-content {
    padding: 2rem;
}

.card-content h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card-content p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Service Cards */
.service-card {
    background: linear-gradient(135deg, #f8fbff 0%, #f0f7ff 50%, #e8f4ff 100%);
    padding: 2.5rem;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    text-align: center;
}

.service-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.2);
    transform: translateY(-5px);
    background: linear-gradient(135deg, #e8f4ff 0%, #d6edff 50%, #c5e7ff 100%);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card ul {
    list-style: none;
    text-align: left;
    margin: 1.5rem 0;
}

.service-card ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.service-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 700;
}

/* Team Members */
.team-member {
    text-align: center;
    background: linear-gradient(135deg, #fef5ff 0%, #f9f0ff 50%, #f3ebff 100%);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 2px solid #e9d5ff;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(147, 51, 234, 0.2);
    background: linear-gradient(135deg, #f9f0ff 0%, #f3ebff 50%, #ede0ff 100%);
}

.team-member img {
    width: 100%;
    max-width: 300px;
    height: 350px;
    object-fit: cover;
    border-radius: 12px;
    margin: 0 auto 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.team-member h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.team-member .role {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.0625rem;
}

.team-member p {
    color: var(--text-light);
}

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

.review-card {
    background: linear-gradient(135deg, #fff9f0 0%, #fff5e6 50%, #fff0db 100%);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    border: 2px solid #ffe8c8;
    transition: all 0.3s ease;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.2);
    background: linear-gradient(135deg, #fff5e6 0%, #ffe8c8 50%, #ffddb0 100%);
}

.review-stars {
    color: var(--accent-color);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.review-text {
    font-style: italic;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

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

.review-location {
    font-size: 0.9375rem;
    color: var(--text-light);
}

/* Stats Section */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--text-light);
    font-weight: 500;
}

/* FAQ Section */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
    width: 100%;
    padding: 1.5rem 2rem;
    background: var(--white);
    border: none;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

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

.faq-answer {
    padding: 0 2rem 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
    display: none;
}

.faq-answer.active {
    display: block;
}

.faq-icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

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

/* Areas Covered */
.areas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.area-item {
    background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.area-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.area-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.area-item p {
    color: var(--secondary-color);
    font-weight: 500;
}

/* Blog Section */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
}

.blog-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    cursor: pointer;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.blog-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.blog-content {
    padding: 2rem;
}

.blog-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9375rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.blog-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.blog-excerpt {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.read-more {
    color: var(--secondary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.read-more:hover {
    color: var(--accent-color);
}

/* Blog Article Page */
.blog-article {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.blog-header {
    max-width: 900px;
    margin: 3rem auto 2.5rem;
    padding: 0 2rem;
}

.blog-header h1 {
    font-size: 2rem;
    line-height: 1.3;
    margin-bottom: 0.75rem;
    color: #1a202c;
    font-weight: 700;
}

.blog-meta {
    color: #718096;
    font-size: 0.875rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.blog-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.blog-article {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.blog-article > img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    margin-bottom: 2.5rem;
}

.article-content {
    font-size: 1.125rem;
    line-height: 1.9;
}

.article-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
}

.article-content h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.article-content img {
    width: 100%;
    border-radius: 8px;
    margin: 2rem 0;
}

.article-content ul,
.article-content ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.article-content li {
    margin-bottom: 0.75rem;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section p {
    color: var(--white);
}

.footer-section a {
    color: var(--white);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--white);
}

.footer-bottom p {
    color: var(--white);
}

.footer-bottom a {
    color: var(--white);
    text-decoration: underline;
}

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

.accreditations {
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
    margin-top: 2rem;
}

.accreditation-badge {
    background: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9375rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Responsive Design */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .mobile-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
    }

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

    .cta-buttons {
        justify-content: center;
    }

    .grid-3, .grid-4 {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 640px) {
    .container {
        padding: 3rem 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero-form {
        padding: 1.5rem;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .accreditations {
        flex-direction: column;
    }
}

/* Animation & Loading */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Lazy Loading Placeholder */
img[loading="lazy"] {
    background: var(--bg-light);
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

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

/* Related Articles Section */
.related-articles {
    background: #f7fafc;
    padding: 4rem 2rem;
}

.related-articles .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.related-articles h2 {
    text-align: center;
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 3rem;
}

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

.article-card {
    background: linear-gradient(135deg, #e6f9f0 0%, #d0f0e0 50%, #bae8d0 100%);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid #b8e8cc;
}

.article-card:nth-child(2) {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
    border: 2px solid #90caf9;
}

.article-card:nth-child(3) {
    background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 50%, #80cbc4 100%);
    border: 2px solid #80cbc4;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.article-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.article-card h3 a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-card h3 a:hover {
    color: var(--secondary-color);
}

.article-card p {
    color: #2d3748;
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
}

/* Print Styles */
@media print {
    .header, .footer, .hero-form, .cta-buttons {
        display: none;
    }
}