/* ================================
   CSS Variables & Reset
   ================================ */
:root {
    /* Colors - Matched to Logo */
    --bg-primary: #0d1829;
    --bg-secondary: #111d2e;
    --bg-card: #162338;
    --accent-cyan: #00e5ff;
    --accent-teal: #00d9d9;
    --accent-blue: #3d9dff;
    --text-primary: #ffffff;
    --text-secondary: #b8c5db;
    --text-muted: #7a8599;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00e5ff 0%, #00d9d9 100%);
    --gradient-secondary: linear-gradient(135deg, #3d9dff 0%, #00e5ff 100%);
    --gradient-glow: radial-gradient(circle at center, rgba(0, 229, 255, 0.15) 0%, transparent 70%);
    
    /* Spacing */
    --container-width: 1200px;
    --section-padding: 100px;
    
    /* Typography */
    --font-display: 'Sora', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Animation */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ================================
   Container & Layout
   ================================ */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

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

.section-header.centered {
    text-align: center;
}

.section-title {
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    max-width: 700px;
    font-size: 1.2rem;
}

.section-header.centered .section-description {
    margin: 0 auto;
}

/* ================================
   Navigation
   ================================ */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 24, 41, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 229, 255, 0.1);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-cyan);
}

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

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--accent-cyan);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-cta {
    margin-left: 2rem;
}

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #0d1829;
    box-shadow: 0 10px 30px rgba(0, 229, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 229, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-cyan);
    border: 2px solid var(--accent-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 229, 255, 0.1);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.1rem;
}

.btn svg {
    position: relative;
    z-index: 1;
}

/* ================================
   Hero Section
   ================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 100px;
}

.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 229, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 217, 217, 0.08) 0%, transparent 50%);
    animation: backgroundPulse 8s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: 2rem;
}

.hero-title-line {
    display: block;
    animation: fadeInUp 0.8s ease-out backwards;
}

.hero-title-line:nth-child(1) { animation-delay: 0.1s; }
.hero-title-line:nth-child(2) { animation-delay: 0.2s; }
.hero-title-line:nth-child(3) { animation-delay: 0.3s; }

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.5s backwards;
}

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

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.neural-network {
    position: absolute;
    width: 400px;
    height: 400px;
    background: 
        radial-gradient(circle at center, transparent 40%, rgba(0, 229, 255, 0.1) 40%, rgba(0, 229, 255, 0.1) 41%, transparent 41%),
        radial-gradient(circle at center, transparent 60%, rgba(0, 217, 217, 0.1) 60%, rgba(0, 217, 217, 0.1) 61%, transparent 61%),
        radial-gradient(circle at center, transparent 80%, rgba(61, 157, 255, 0.1) 80%, rgba(61, 157, 255, 0.1) 81%, transparent 81%);
    animation: rotate 20s linear infinite;
}

.ai-orb {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 
        0 0 60px rgba(0, 229, 255, 0.5),
        inset 0 0 40px rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

/* ================================
   Services Grid
   ================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid rgba(0, 229, 255, 0.1);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-cyan);
    box-shadow: 0 20px 40px rgba(0, 229, 255, 0.2);
}

.service-icon {
    margin-bottom: 1.5rem;
    animation: fadeIn 0.6s ease-out;
}

.service-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.service-link:hover {
    gap: 1rem;
}

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

/* ================================
   Industries & Features Grid
   ================================ */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.industry-card {
    background: var(--bg-card);
    border: 1px solid rgba(0, 229, 255, 0.1);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.industry-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-teal);
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.05) 0%, rgba(0, 217, 217, 0.05) 100%);
}

.industry-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    filter: grayscale(1);
    transition: var(--transition);
}

.industry-card:hover .industry-icon {
    filter: grayscale(0);
    transform: scale(1.2);
}

.industry-card h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
    animation: bounce 2s ease-in-out infinite;
}

.feature-card:nth-child(2) .feature-icon { animation-delay: 0.2s; }
.feature-card:nth-child(3) .feature-icon { animation-delay: 0.4s; }
.feature-card:nth-child(4) .feature-icon { animation-delay: 0.6s; }

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.feature-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* ================================
   CTA Section
   ================================ */
.cta-section {
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.05) 0%, rgba(0, 217, 217, 0.05) 100%);
    border-top: 1px solid rgba(0, 229, 255, 0.2);
    border-bottom: 1px solid rgba(0, 229, 255, 0.2);
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(0, 229, 255, 0.1);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    height: 50px;
    margin-bottom: 1rem;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-column h5 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(0, 229, 255, 0.1);
    color: var(--text-muted);
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 968px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(13, 24, 41, 0.98);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-cta {
        margin-left: 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .neural-network {
        width: 250px;
        height: 250px;
    }
    
    .ai-orb {
        width: 150px;
        height: 150px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .services-grid,
    .industries-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
}