/* ===================================
   Gsoft Interactive Systems - Main CSS
   Software Development Company Lagos
   =================================== */

/* CSS Variables for Consistent Theming */
:root {
    /* Primary Colors */
    --primary-color: #0066cc;
    --primary-dark: #004499;
    --primary-light: #3385d6;
    
    /* Secondary Colors */
    --secondary-color: #ff6b35;
    --secondary-dark: #e55a2b;
    --secondary-light: #ff8563;
    
    /* Neutral Colors */
    --dark-color: #1a1a1a;
    --gray-dark: #333333;
    --gray-medium: #666666;
    --gray-light: #f8f9fa;
    --white: #ffffff;
    
    /* Accent Colors */
    --success-color: #28a745;
    --warning-color: #ffc107;
    --error-color: #dc3545;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    
    /* Font Sizes */
    --fs-hero: clamp(2.5rem, 5vw, 4rem);
    --fs-h1: clamp(2rem, 4vw, 3rem);
    --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
    --fs-h3: clamp(1.25rem, 2.5vw, 1.75rem);
    --fs-body: 1rem;
    --fs-small: 0.875rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Layout */
    --container-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --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);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

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

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

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

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

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

a:hover {
    color: var(--primary-dark);
}

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

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

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

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.highlight {
    color: var(--secondary-color);
    font-weight: 700;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: var(--fs-body);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
}

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

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

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

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

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

.section-title {
    margin-bottom: var(--spacing-md);
    position: relative;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-medium);
    max-width: 600px;
    margin: 0 auto;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all var(--transition-normal);
}

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

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

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

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--gray-dark);
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-normal);
}

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

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 250px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-dark);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--gray-light);
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: var(--gray-dark);
    margin: 2px 0;
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
    padding: var(--spacing-xl) 0;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.9) 0%, rgba(26, 26, 26, 0.8) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    width: 100%;
}

.hero-title {
    font-size: var(--fs-hero);
    color: var(--white);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    line-height: 1;
}

.stat-label {
    font-size: var(--fs-small);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.hero-visual {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-down {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: var(--white);
    font-size: 1.25rem;
    transition: all var(--transition-normal);
    animation: bounce 2s infinite;
}

.scroll-down:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.02);
}

.service-card.featured::before {
    height: 6px;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 2rem;
    color: var(--white);
}

.service-title {
    color: var(--dark-color);
    margin-bottom: var(--spacing-md);
}

.service-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.service-features li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: var(--spacing-md);
    color: var(--gray-medium);
}

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

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

.service-link:hover {
    gap: var(--spacing-sm);
    color: var(--primary-dark);
}

/* Why Choose Us Section */
.why-choose-us {
    background-color: var(--white);
}

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

.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.feature-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2.5rem;
    color: var(--white);
    transition: all var(--transition-normal);
}

.feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    color: var(--dark-color);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    line-height: 1.7;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
}

.cta-title {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

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

.cta-section .btn-primary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.cta-section .btn-primary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
}

.cta-section .btn-secondary {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

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

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand img {
    margin-bottom: var(--spacing-md);
}

.footer-description {
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
    color: var(--white);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.footer-title {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

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

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

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

.footer-list a:hover {
    color: var(--primary-light);
}

.footer-list svg {
    margin-right: var(--spacing-xs);
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

.footer-list i {
    margin-right: var(--spacing-xs);
    width: 16px;
}

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

.footer-copyright {
    opacity: 0.7;
}

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

.footer-legal a {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--fs-small);
}

.footer-legal a:hover {
    color: var(--primary-light);
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.whatsapp-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: white;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
    transition: all var(--transition-normal);
    animation: whatsappPulse 2s infinite;
}

.whatsapp-button:hover {
    background-color: #20ba5a;
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
    color: white;
}

@keyframes whatsappPulse {
    0% {
        box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
    }
    50% {
        box-shadow: 0 4px 16px rgba(37, 211, 102, 0.6);
    }
    100% {
        box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
    }
}

/* WhatsApp button responsive */
@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
    }
    
    .whatsapp-button {
        width: 50px;
        height: 50px;
    }
    
    .whatsapp-button svg {
        width: 25px;
        height: 25px;
    }
}

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loading.fade-out {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--gray-light);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#typewriter {
    color: #ff6b35; /* Orange color */
}

.typewriter {
    border-right: 3px solid #ff6b35; /* Orange cursor */
    animation: cursor-blink 1s infinite;
}

@keyframes cursor-blink {
    0%, 50% { border-color: #ff6b35; }
    51%, 100% { border-color: transparent; }
}

/* Development Process Styles */
.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.process-step {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-normal);
}

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

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
}

.step-title {
    color: var(--dark-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.step-description {
    color: var(--gray-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.step-features {
    list-style: none;
    padding: 0;
}

.step-features li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--gray-medium);
}

.step-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Technology Stack Styles */
.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.tech-category {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.tech-category:hover {
    box-shadow: var(--shadow-md);
}

.tech-category-title {
    color: var(--dark-color);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-size: 1.125rem;
}

.tech-stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background: var(--gray-light);
    transition: all var(--transition-normal);
}

.tech-item:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.tech-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.tech-name {
    font-weight: 600;
    font-size: 0.875rem;
}

/* Case Studies Styles */
.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.case-study-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.case-study-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.case-study-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.case-study-icon {
    font-size: 2.5rem;
    margin-right: var(--spacing-md);
}

.case-study-title {
    color: var(--dark-color);
    margin-bottom: var(--spacing-xs);
    font-size: 1.125rem;
}

.case-study-client {
    color: var(--gray-medium);
    font-size: 0.875rem;
}

.case-study-description {
    color: var(--gray-medium);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.case-study-results {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.result-item {
    text-align: center;
    flex: 1;
    min-width: 80px;
}

.result-number {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    line-height: 1;
}

.result-label {
    font-size: 0.75rem;
    color: var(--gray-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.case-study-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .process-timeline,
    .tech-categories,
    .case-studies-grid {
        grid-template-columns: 1fr;
    }
    
    .case-study-results {
        flex-direction: column;
        text-align: center;
    }
    
    .result-item {
        margin-bottom: var(--spacing-sm);
    }
}