/* 
===============================================
VERTICAL PARTNERS LIMITED - CORPORATE WEBSITE
===============================================
Brand Colors:
- Primary Green: #B7F34A
- Corporate Black: #111111
- Accent Red: #E10600
- Background: #F8F9FA
- White: #FFFFFF
===============================================
*/

/* ==================== CSS RESET & BASE ==================== */

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

:root {
    /* Brand Colors */
    --primary-green: #B7F34A;
    --corporate-black: #111111;
    --accent-red: #E10600;
    --background-grey: #F8F9FA;
    --white: #FFFFFF;
    
    /* Text Colors */
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-light: #777777;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

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

/* ==================== TYPOGRAPHY ==================== */

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

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

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

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

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    line-height: 1.8;
}

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

a:hover,
a:focus {
    color: var(--corporate-black);
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

/* ==================== LAYOUT UTILITIES ==================== */

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

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background-color: var(--background-grey);
}

/* ==================== NAVIGATION ==================== */

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    height: 70px;
    width: auto;
}

.logo img {
    height: 100%;
    width: auto;
}

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

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.main-nav a:hover,
.main-nav a:focus {
    background-color: var(--primary-green);
    color: var(--corporate-black);
    outline: none;
}

.main-nav a.active {
    color: var(--primary-green);
    font-weight: 600;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--corporate-black);
    margin: 5px 0;
    transition: var(--transition-normal);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.mobile-menu-overlay.active {
    opacity: 1;
}

/* ==================== BUTTONS ==================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn:focus {
    outline: 3px solid var(--corporate-black);
    outline-offset: 2px;
}

.btn-primary {
    background-color: var(--primary-green);
    color: var(--corporate-black);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--corporate-black);
    color: var(--primary-green);
    border-color: var(--primary-green);
}

.btn-secondary {
    background-color: transparent;
    color: var(--corporate-black);
    border-color: var(--corporate-black);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--corporate-black);
    color: var(--white);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* ==================== HERO SECTION ==================== */

.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--corporate-black) 0%, #2a2a2a 100%);
    color: var(--white);
    padding: var(--spacing-2xl) var(--spacing-md);
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none" stroke="%23B7F34A" stroke-width="1" opacity="0.05"/></svg>');
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero h1 span {
    color: var(--primary-green);
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== GRID LAYOUTS ==================== */

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

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

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* ==================== CARD COMPONENTS ==================== */

.card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    height: 100%;
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-green);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.card h3 {
    color: var(--corporate-black);
    margin-bottom: var(--spacing-sm);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==================== SECTION HEADERS ==================== */

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl) auto;
}

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

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

.section-divider {
    width: 80px;
    height: 4px;
    background-color: var(--primary-green);
    margin: var(--spacing-sm) auto;
}

/* ==================== PARTNERS SLIDER ==================== */

.partners-slider {
    overflow: hidden;
    position: relative;
    padding: var(--spacing-md) 0;
}

.partners-track {
    display: flex;
    gap: var(--spacing-lg);
    animation: scroll 30s linear infinite;
}

.partner-logo {
    flex-shrink: 0;
    width: 180px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: var(--transition-normal);
}

.partner-logo:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* ==================== CTA SECTION ==================== */

.cta-section {
    background: linear-gradient(135deg, var(--primary-green) 0%, #95d138 100%);
    color: var(--corporate-black);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) var(--spacing-md);
}

.cta-section h2 {
    color: var(--corporate-black);
    margin-bottom: var(--spacing-md);
}

.cta-section .btn {
    background-color: var(--corporate-black);
    color: var(--white);
}

.cta-section .btn:hover {
    background-color: var(--white);
    color: var(--corporate-black);
}

/* ==================== FORMS ==================== */

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #ddd;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(183, 243, 74, 0.2);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-error {
    color: var(--accent-red);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.form-group.error input,
.form-group.error textarea,
.form-group.error select {
    border-color: var(--accent-red);
}

.form-group.error .form-error {
    display: block;
}

.form-success,
.form-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: none;
}

.form-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.form-message.show {
    display: block;
}

/* ==================== GALLERY ==================== */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    cursor: pointer;
    aspect-ratio: 4/3;
    background-color: var(--background-grey);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-item::after {
    content: '🔍';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    opacity: 0;
    transition: var(--transition-normal);
}

.gallery-item:hover::after {
    opacity: 1;
}

/* Gallery Modal */
.gallery-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.gallery-modal.active {
    display: flex;
}

.gallery-modal-content {
    max-width: 90%;
    max-height: 90vh;
    position: relative;
    animation: fadeInScale 0.3s ease-out;
}

.gallery-modal-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.gallery-modal-close,
.gallery-modal-prev,
.gallery-modal-next {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    transition: var(--transition-fast);
    z-index: 2001;
}

.gallery-modal-close {
    top: 20px;
    right: 20px;
}

.gallery-modal-prev {
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.gallery-modal-next {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.gallery-modal-close:hover,
.gallery-modal-prev:hover,
.gallery-modal-next:hover {
    background-color: var(--primary-green);
}

/* ==================== PROJECT CARDS ==================== */

.project-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

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

.project-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background-color: var(--background-grey);
}

.project-content {
    padding: var(--spacing-md);
}

.project-location {
    color: var(--primary-green);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.project-title {
    font-size: 1.25rem;
    color: var(--corporate-black);
    margin-bottom: var(--spacing-xs);
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==================== FOOTER ==================== */

.main-footer {
    background-color: var(--corporate-black);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.main-footer .logo img {
    filter: brightness(0) invert(1);
    height: 70px;
}

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

.footer-section h3 {
    color: var(--primary-green);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

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

.footer-section a:hover {
    color: var(--primary-green);
    outline: none;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--primary-green);
    color: var(--corporate-black);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    border: none;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--corporate-black);
    color: var(--primary-green);
    transform: translateY(-5px);
}

/* ==================== ANIMATIONS ==================== */

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.fade-in-delay-1 {
    animation-delay: 0.2s;
}

.fade-in-delay-2 {
    animation-delay: 0.4s;
}

.fade-in-delay-3 {
    animation-delay: 0.6s;
}

/* Scroll reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 1024px) {
    :root {
        --spacing-2xl: 4rem;
        --spacing-xl: 3rem;
    }
    
    .hero {
        min-height: 70vh;
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-xl) var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-normal);
        z-index: 1000;
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-sm);
        width: 100%;
    }
    
    .main-nav a {
        display: block;
        width: 100%;
        padding: var(--spacing-sm);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .mobile-menu-overlay {
        display: block;
    }
    
    .hero {
        min-height: 60vh;
        margin-top: 65px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .grid-4 {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .gallery-modal-prev,
    .gallery-modal-next {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .gallery-modal-close {
        width: 40px;
        height: 40px;
        top: 10px;
        right: 10px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-2xl: 3rem;
        --spacing-xl: 2rem;
        --spacing-lg: 2rem;
    }
    
    .container,
    .container-wide {
        padding: 0 var(--spacing-sm);
    }
    
    .btn-large {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
    
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* ==================== ACCESSIBILITY ==================== */

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-green);
    color: var(--corporate-black);
    padding: var(--spacing-xs) var(--spacing-sm);
    text-decoration: none;
    z-index: 100;
}

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

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 3px solid var(--primary-green);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print styles */
@media print {
    .main-header,
    .main-footer,
    .back-to-top,
    .mobile-menu-toggle {
        display: none;
    }
    
    .hero {
        margin-top: 0;
    }
}