/* ===== CSS Variables for Modern Tech Theme ===== */
:root {
    /* Modern Tech Color Palette */
    --primary-blue: #0066FF;
    --primary-dark: #0A2540;
    --primary-accent: #00D4AA;
    --secondary-accent: #635BFF;
    
    /* Neutral Palette */
    --light-bg: #FFFFFF;
    --light-surface: #F8FAFC;
    --light-text: #0A2540;
    --light-text-secondary: #425466;
    --light-border: #E6EBF0;
    --light-hover: #F6F9FC;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-accent) 100%);
    --gradient-hero: linear-gradient(135deg, #0A2540 0%, #1A365D 100%);
    
    /* Spacing */
    --section-padding: 6rem 0;
    --container-max-width: 1200px;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-accent: 'Playfair Display', serif;
    
    /* Border Radius */
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.05);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-blue);
    color: white;
    padding: 8px;
    z-index: 10000;
    text-decoration: none;
    border-radius: 0 0 4px 0;
}

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

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

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

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    margin-bottom: 1rem;
    color: var(--light-text);
    font-weight: 700;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--light-text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--light-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    height: 100%;
    padding: 10px 0;
}

.nav-logo img {
    height: 60px;
    width: auto;
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

/* Language Selector */
.language-selector {
    padding: 8px 16px;
    border: 1px solid var(--light-border);
    border-radius: var(--border-radius);
    background: var(--light-bg);
    color: var(--light-text);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 1rem;
}

.language-selector:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0.5rem;
}

.bar {
    width: 25px;
    height: 2px;
    background: var(--light-text);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== Hero Section ===== */
.hero {
    padding: 140px 0 100px;
    background: var(--gradient-hero);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" opacity="0.05"><polygon fill="white" points="0,1000 1000,0 1000,1000"/></svg>') no-repeat bottom right;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    color: white;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.375rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto 3rem;
    line-height: 1.6;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2rem;
}

.back-link:hover {
    color: white;
    transform: translateX(-5px);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
    gap: 8px;
    line-height: 1.4;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-card {
    width: 100%;
    background: var(--light-surface);
    color: var(--light-text);
    border: 1px solid var(--light-border);
    margin-top: 1rem;
}

.btn-card:hover {
    background: var(--light-hover);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    transform: translateY(-2px);
}

/* ===== Technical Services Section ===== */
.technical-services {
    padding: var(--section-padding);
    background: var(--light-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.service-card {
    background: var(--light-bg);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    border: 1px solid var(--light-border);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.tech-stack {
    background: rgba(0, 102, 255, 0.05);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
    border-left: 4px solid var(--primary-blue);
}

.tech-stack h4 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.architecture {
    margin: 2rem 0;
}

.architecture-list {
    list-style: none;
    margin-top: 1rem;
}

.architecture-list li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.architecture-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-accent);
    font-weight: bold;
}

.portfolio-project {
    background: rgba(0, 212, 170, 0.05);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: auto;
    border-left: 4px solid var(--primary-accent);
}

.portfolio-stack {
    font-family: monospace;
    background: var(--light-surface);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    font-size: 0.9rem;
    border: 1px solid var(--light-border);
}

/* ===== Service Icons ===== */
.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.05) rotate(5deg);
}

.icon-data {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(99, 91, 255, 0.1) 100%);
    border: 1.5px solid rgba(0, 102, 255, 0.15);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.08);
}

.icon-data:before {
    content: "";
    width: 32px;
    height: 40px;
    background: 
        linear-gradient(45deg, transparent 45%, var(--primary-blue) 45%, var(--primary-blue) 55%, transparent 55%),
        linear-gradient(-45deg, transparent 45%, var(--primary-blue) 45%, var(--primary-blue) 55%, transparent 55%);
    background-size: 10px 10px;
    background-position: 0 0, 0 10px;
    background-repeat: no-repeat;
    border: 2px solid var(--primary-blue);
    border-radius: 4px;
    position: relative;
}

.icon-brain {
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.1) 0%, rgba(99, 91, 255, 0.1) 100%);
    border: 1.5px solid rgba(0, 212, 170, 0.15);
    box-shadow: 0 4px 12px rgba(0, 212, 170, 0.08);
}

.icon-brain:before {
    content: "";
    width: 36px;
    height: 32px;
    background: 
        radial-gradient(circle at 8px 12px, var(--primary-accent) 4px, transparent 4px),
        radial-gradient(circle at 18px 8px, var(--primary-accent) 4px, transparent 4px),
        radial-gradient(circle at 28px 12px, var(--primary-accent) 4px, transparent 4px);
    border: 2px solid var(--primary-accent);
    border-top: none;
    border-radius: 0 0 18px 18px;
    position: relative;
}

.icon-support {
    background: linear-gradient(135deg, rgba(99, 91, 255, 0.1) 0%, rgba(0, 102, 255, 0.1) 100%);
    border: 1.5px solid rgba(99, 91, 255, 0.15);
    box-shadow: 0 4px 12px rgba(99, 91, 255, 0.08);
}

.icon-support:before {
    content: "";
    width: 32px;
    height: 32px;
    border: 2px solid var(--secondary-accent);
    border-radius: 50%;
    position: relative;
}

.icon-support:after {
    content: "";
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--secondary-accent);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* ===== Closing Section ===== */
.closing {
    padding: var(--section-padding);
    background: var(--light-surface);
    text-align: center;
}

.closing-content {
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Footer ===== */
.footer {
    background: var(--primary-dark);
    color: white;
    padding: 4rem 0 3rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.footer-logo img {
    height: 100px;
    width: auto;
    opacity: 0.9;
    transition: var(--transition);
}

.footer p {
    margin: 0;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    max-width: 500px;
}

/* ===== Mobile Responsive Design ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 1.25rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--light-bg);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 1.5rem;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 2rem;
    }

    .language-selector {
        margin-top: 1rem;
        margin-left: 0;
    }
    
    .service-icon {
        width: 70px;
        height: 70px;
        margin: 0 auto 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-subtitle {
        font-size: 1.1rem;
    }
}

/* ===== Modal Styles ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 37, 64, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    padding: 2rem;
}

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

.tech-modal {
    background: var(--light-bg);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border: 1px solid var(--light-border);
}

.modal-header {
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid var(--light-border);
    position: sticky;
    top: 0;
    background: var(--light-bg);
    z-index: 10;
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
}

.modal-header h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-dark);
}

.modal-subtitle {
    color: var(--light-text-secondary);
    font-size: 1.1rem;
}

.close-modal {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--light-text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.close-modal:hover {
    background: var(--light-hover);
    color: var(--primary-blue);
}

.modal-content {
    padding: 2rem;
}

.modal-section {
    margin-bottom: 2.5rem;
}

.modal-section:last-child {
    margin-bottom: 0;
}

.modal-section h4 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    margin-top: 2rem; /* Add space above headings */
}

.modal-section h4:first-child {
    margin-top: 0; /* First heading in section shouldn't have top margin */
}

.modal-section h5 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    margin-top: 1.5rem; /* Space above subheadings */
}

.modal-section p {
    margin-bottom: 1.5rem; /* Consistent paragraph spacing */
    line-height: 1.6;
    color: var(--light-text);
}

/* Fix spacing for specific sections */
.modal-section .benefits-grid,
.modal-section .features-grid,
.modal-section .tech-stack-grid {
    margin: 1.5rem 0 2rem 0; /* More space below grids */
}

.benefits-grid, .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.benefit-card, .feature-card {
    background: var(--light-surface);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-accent);
}

.benefit-card h5, .feature-card h5 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.benefit-card p, .feature-card p {
    margin-bottom: 0; /* No margin in cards */
    font-size: 0.95rem;
    color: var(--light-text-secondary);
}

.tech-stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.tech-item {
    background: var(--light-surface);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--light-border);
    transition: var(--transition);
}

.tech-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

.tech-item strong {
    display: block;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.architecture-steps {
    list-style: none;
    margin: 1.5rem 0 2rem 0; /* More space below steps */
}

.architecture-steps li {
    padding: 1rem 0 1rem 3rem;
    position: relative;
    border-bottom: 1px solid var(--light-border);
}

.architecture-steps li:last-child {
    border-bottom: none;
}

.architecture-steps li:before {
    content: counter(step);
    counter-increment: step;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 2rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.architecture-steps {
    counter-reset: step;
}

.business-proposition {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(0, 212, 170, 0.05) 100%);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--secondary-accent);
    margin: 2rem 0;
}

.business-proposition p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--light-text);
    margin: 0; /* No margin in proposition box */
}

/* Enhanced service card for technical details */
.service-card.has-details {
    position: relative;
}

.tech-details-btn {
    width: 100%;
    background: var(--light-surface);
    color: var(--light-text);
    border: 1px solid var(--light-border);
    margin-top: 1rem;
    transition: var(--transition);
}

.tech-details-btn:hover {
    background: var(--light-hover);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    transform: translateY(-2px);
}

/* ===== Demo Link Styles ===== */
.demo-link-container {
    text-align: center;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(0, 212, 170, 0.05) 100%);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--light-border);
    margin: 2rem 0;
}

.demo-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    margin: 1rem 0;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.demo-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.demo-note {
    font-size: 0.9rem;
    color: var(--light-text-secondary);
    margin-top: 1rem;
    font-style: italic;
}

/* Additional styles for Support Co-pilot modal */
.architecture-diagram {
    background: var(--light-surface);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-border);
    text-align: center;
    font-family: monospace;
    margin: 1rem 0;
    font-weight: 600;
    color: var(--primary-blue);
}

.demo-highlight {
    background: linear-gradient(135deg, rgba(99, 91, 255, 0.05) 0%, rgba(0, 102, 255, 0.05) 100%);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-accent);
    margin: 1.5rem 0;
}

.scenario-card {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-border);
    margin-top: 1rem;
}

.scenario-card ul {
    margin: 0.5rem 0 0 1rem;
}

.scenario-card li {
    padding: 0.25rem 0;
    position: relative;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.metric-card {
    background: var(--light-surface);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--light-border);
    transition: var(--transition);
}

.metric-card:hover {
    border-color: var(--primary-accent);
    transform: translateY(-2px);
}

.metric-card h5 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.metric-card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--light-text-secondary);
    font-weight: 600;
}

/* Mobile responsive for demo links */
@media (max-width: 768px) {
    .demo-link-container {
        padding: 1.5rem;
    }
    
    .demo-link {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* Mobile responsive for modal */
@media (max-width: 768px) {
    .modal-overlay {
        padding: 1rem;
    }
    
    .modal-content {
        padding: 1.5rem;
    }
    
    .modal-header {
        padding: 1.5rem 1.5rem 1rem;
    }
    
    .benefits-grid, .features-grid, .tech-stack-grid {
        grid-template-columns: 1fr;
    }
    
    .business-proposition {
        padding: 1.5rem;
        margin: 1.5rem 0;
    }
    
    .close-modal {
        top: 1rem;
        right: 1rem;
    }
    
    .modal-section h4 {
        margin-top: 1.5rem;
    }
    
    .modal-section h5 {
        margin-top: 1.25rem;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}