/* ========================================
   United Real Estate Kansas City
   Modern, Professional Design
   ======================================== */

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

:root {
    /* Brand Colors - from branding.md */
    --primary-blue: #0066B2;
    --secondary-blue: #004A7F;
    --accent-teal: #10B981;
    --dark-text: #1F2937;
    --gray-text: #6B7280;
    --light-gray: #F3F4F6;
    --white: #FFFFFF;

    /* Typography */
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: var(--white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--secondary-blue);
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-text);
    margin-bottom: var(--spacing-sm);
}

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

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

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

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

.lead {
    font-size: 1.125rem;
    color: var(--gray-text);
    margin-bottom: var(--spacing-md);
}

/* ========== Layout Utilities ========== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header.centered {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--spacing-lg);
}

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

/* ========== Buttons ========== */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-family: var(--font-body);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    font-size: 1rem;
}

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

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

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

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

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

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

/* ========== Header ========== */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo img {
    height: 50px;
    width: auto;
}

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

.nav a {
    font-weight: 500;
    color: var(--dark-text);
    transition: var(--transition);
}

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

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

.mobile-menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--dark-text);
    transition: var(--transition);
}

/* ========== Hero Section ========== */
.hero {
    position: relative;
    background-image: url('https://images.unsplash.com/photo-1449844908441-8829872d2607?w=1600&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: var(--spacing-xl) 0;
    min-height: 600px;
    display: flex;
    align-items: center;
    color: var(--white);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 74, 127, 0.9) 0%, rgba(0, 102, 178, 0.85) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.95);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ========== Services Section ========== */
.services {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-md);
    background-color: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(0, 102, 178, 0.1);
    transform: translateY(-4px);
}

.service-icon {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    color: var(--dark-text);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--gray-text);
    margin-bottom: 0;
}

/* ========== Two Column Sections ========== */
.buyers-section,
.sellers-section {
    padding: var(--spacing-xl) 0;
}

.buyers-section {
    background-color: var(--light-gray);
}

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

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.two-column.reverse {
    direction: rtl;
}

.two-column.reverse > * {
    direction: ltr;
}

.column-content h2 {
    margin-bottom: var(--spacing-sm);
}

.column-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.feature-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.feature-list li {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    position: relative;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-teal);
    font-weight: bold;
    font-size: 1.25rem;
}

.feature-list strong {
    color: var(--dark-text);
    margin-bottom: 0.25rem;
}

.feature-list span {
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* ========== Agents Section ========== */
.agents-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--light-gray);
}

.agents-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.benefit-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--primary-blue);
}

.benefit-card h3 {
    color: var(--primary-blue);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.benefit-card p {
    color: var(--gray-text);
    margin-bottom: 0;
}

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

/* ========== About Section ========== */
.about-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
}

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

.about-content h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.about-content p {
    font-size: 1.0625rem;
    color: var(--gray-text);
    margin-bottom: var(--spacing-md);
}

.partnerships {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.partnership {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
}

.partnership h4 {
    color: var(--primary-blue);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.partnership p {
    color: var(--gray-text);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ========== Contact Section ========== */
.contact-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--light-gray);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item h3 {
    color: var(--primary-blue);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--gray-text);
    margin-bottom: 0;
}

.contact-item a {
    color: var(--gray-text);
    font-weight: 500;
}

.contact-item a:hover {
    color: var(--primary-blue);
}

/* ========== Contact Form ========== */
.contact-form-container {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

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

/* ========== Footer ========== */
.footer {
    background-color: var(--dark-text);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo img {
    height: 40px;
    margin-bottom: var(--spacing-sm);
    filter: brightness(0) invert(1);
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-column h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

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

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--white);
}

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

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

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        transform: translateY(-120%);
        transition: var(--transition);
    }

    .nav.active {
        transform: translateY(0);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero {
        background-attachment: scroll;
        min-height: 500px;
        padding: var(--spacing-lg) 0;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn-lg {
        width: 100%;
    }

    .two-column,
    .two-column.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .two-column.reverse .column-image {
        order: -1;
    }

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

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

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .agents-benefits {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

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

    .logo img {
        height: 40px;
    }
}