/* RSF Village - Modern, Professional CSS */
/* Design Philosophy: Clean, sustainable, premium feel with subtle animations */

:root {
    /* Brand Colors */
    --primary-blue: #2C5AA0;
    --accent-blue: #4A90E2;
    --light-blue: #E8F2FF;
    --primary-green: #0A5F38;
    --accent-green: #14B679;
    --light-green: #E8F5E9;
    --dark-gray: #1A1A1A;
    --medium-gray: #4A4A4A;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-xxl: 3rem;
    --font-size-hero: clamp(2.5rem, 5vw, 4rem);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
}

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

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

h1 { font-size: var(--font-size-hero); }
h2 { font-size: var(--font-size-xxl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

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

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

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

/* Buttons */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-medium);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--shadow);
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--medium-gray);
    border-color: var(--medium-gray);
}

.btn-outline:hover {
    background-color: var(--medium-gray);
    color: var(--white);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
    transition: all var(--transition-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary-blue);
}

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

.nav-menu a {
    color: var(--dark-gray);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-green);
    transition: width var(--transition-fast);
}

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

.nav-cta {
    background-color: var(--primary-blue);
    color: var(--white) !important;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.nav-cta:hover {
    background-color: var(--accent-blue);
    transform: translateY(-2px);
}

.lang-switch {
    font-weight: 700;
    color: var(--primary-blue) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--dark-gray);
    margin: 3px 0;
    transition: var(--transition-fast);
}

/* Hero Section */
#hero {
    min-height: 100vh;
    padding-top: 80px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
}

.hero {
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--medium-gray);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    animation: fadeIn 1s ease-out;
    animation-fill-mode: both;
}

.stat:nth-child(1) { animation-delay: 0.2s; }
.stat:nth-child(2) { animation-delay: 0.4s; }
.stat:nth-child(3) { animation-delay: 0.6s; }

.stat-number {
    display: block;
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
}

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

.hero-visual {
    flex: 1;
    position: relative;
    height: 600px;
}

.hero-image-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px var(--shadow);
    animation: float 6s ease-in-out infinite;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--white);
    text-align: center;
}

/* Trust Bar */
.trust-bar {
    background-color: var(--light-gray);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(0,0,0,0.05);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.trust-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.trust-item {
    text-align: center;
    padding: var(--spacing-sm);
}

.trust-item h3 {
    color: var(--primary-blue);
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-xs);
}

.trust-item p {
    color: var(--medium-gray);
    font-size: var(--font-size-sm);
}

/* Section Styles */
section {
    padding: var(--spacing-xxl) 0;
}

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

.section-header h2 {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-md);
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Solution Section */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.solution-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 5px 20px var(--shadow);
    transition: all var(--transition-medium);
    text-align: center;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background-color: var(--light-blue);
    border-radius: 50%;
    color: var(--primary-blue);
}

.solution-card h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

/* Process Timeline */
.process-timeline {
    background-color: var(--light-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

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

.timeline-item {
    text-align: center;
    position: relative;
}

.timeline-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

/* Sustainability Section */
.sustainability {
    background-color: var(--light-green);
}

.sustainability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.carbon-highlight {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px var(--shadow);
    margin-bottom: var(--spacing-lg);
}

.carbon-highlight h3 {
    font-size: var(--font-size-hero);
    color: var(--primary-green);
    margin-bottom: var(--spacing-xs);
}

.carbon-detail {
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
    font-style: italic;
}

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

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.benefit-icon {
    font-size: 2rem;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--light-green);
    border-radius: 50%;
    color: var(--primary-green);
}

.eco-badge {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 10px 30px var(--shadow);
}

/* Benefits Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.benefit-card {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    transition: all var(--transition-medium);
}

.benefit-card:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px var(--shadow);
}

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

.benefit-card ul {
    list-style: none;
    padding-left: 0;
}

.benefit-card li {
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.benefit-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 700;
}

/* ROI Calculator */
.roi-calculator {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.calculator-simple {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 400px;
    margin: var(--spacing-md) auto;
}

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

.calc-input label {
    font-weight: 500;
}

.calc-input input {
    width: 100px;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    border: none;
    text-align: center;
    font-size: var(--font-size-md);
}

.calc-result {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px solid rgba(255,255,255,0.3);
}

.calc-result h3 {
    font-size: var(--font-size-xxl);
    margin-top: var(--spacing-xs);
}

/* Locations Section */
.locations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.location-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 5px 20px var(--shadow);
    position: relative;
    transition: all var(--transition-medium);
}

.location-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.location-status {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.location-card h3 {
    margin-top: var(--spacing-md);
}

.location-card.available .location-status {
    background-color: var(--accent-green);
    color: var(--white);
}

.location-card.planned .location-status {
    background-color: var(--medium-gray);
    color: var(--white);
}

.location-details {
    margin: var(--spacing-sm) 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    color: var(--medium-gray);
    font-size: var(--font-size-sm);
}

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

/* References Section */
.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.testimonial {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    position: relative;
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-md);
    font-size: 4rem;
    color: var(--primary-blue);
    opacity: 0.2;
}

.testimonial-content p {
    font-style: italic;
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-md);
}

.testimonial-author strong {
    display: block;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.testimonial-author span {
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
}

/* Case Studies */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.case-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: 0 5px 20px var(--shadow);
    transition: all var(--transition-medium);
}

.case-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.case-link {
    color: var(--primary-blue);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: all var(--transition-fast);
}

.case-link:hover {
    color: var(--accent-blue);
    transform: translateX(5px);
}

/* Ideas Section */
.ideas {
    background-color: var(--light-gray);
}

.ideas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.idea-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 5px 20px var(--shadow);
    transition: all var(--transition-medium);
}

.idea-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

/* Contact Section */
.contact {
    background-color: var(--primary-blue);
    color: var(--white);
}

.contact h2, .contact h3 {
    color: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.contact-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--light-blue);
}

.download-section {
    margin-top: var(--spacing-lg);
}

.download-section .btn-outline {
    color: var(--white);
    border-color: var(--white);
    margin-right: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

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

/* Contact Form */
.contact-form {
    background-color: rgba(255,255,255,0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

/* Footer */
.footer {
    background-color: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h4 {
    color: var(--accent-blue);
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--white);
    display: block;
    margin-bottom: var(--spacing-xs);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--white);
    opacity: 0.7;
}

.footer-legal a:hover {
    opacity: 1;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    animation: fadeIn var(--transition-fast);
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    max-width: 500px;
    position: relative;
    animation: slideDown var(--transition-medium);
}

.close {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--medium-gray);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.close:hover {
    color: var(--dark-gray);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% { transform: translate(-50%, -50%) translateY(0px); }
    50% { transform: translate(-50%, -50%) translateY(-20px); }
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Typography */
    :root {
        --font-size-hero: 2rem;
        --font-size-xxl: 1.75rem;
        --font-size-xl: 1.5rem;
        --font-size-lg: 1.25rem;
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition-medium);
        box-shadow: 0 10px 27px var(--shadow);
        padding: var(--spacing-lg) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    /* Hero */
    #hero {
        min-height: auto;
        padding-top: 100px;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    /* Grid Adjustments */
    .solution-grid,
    .benefits-grid,
    .locations-grid,
    .testimonials,
    .case-grid,
    .ideas-grid {
        grid-template-columns: 1fr;
    }
    
    .sustainability-content,
    .contact-content,
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .timeline {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}