:root {
    /* Colors */
    --color-bg: #020617;
    --color-surface: #0f172a;
    --color-primary: #3b82f6;
    --color-secondary: #e11d48;
    /* Alarm Red */
    --color-accent: #06b6d4;
    --color-text-main: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-border: #1e293b;

    /* Typography */
    --font-main: 'Inter', sans-serif;

    /* Spacing */
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 15px rgba(59, 130, 246, 0.5);
    --shadow-glow-red: 0 0 15px rgba(225, 29, 72, 0.5);

    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

/* Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background: rgba(59, 130, 246, 0.1);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.3);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 800;
}

.section-subtitle {
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 0.8rem;
    display: block;
    text-align: center;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(2, 6, 23, 0.8);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
}

.nav-links a:hover {
    color: white;
}

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    /* Offset for fixed nav */
    position: relative;
    background: radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(225, 29, 72, 0.1) 0%, transparent 40%);
    overflow: hidden;
}

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

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-text p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Visual Placeholder Animation */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.pulse-circle {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--color-primary) 0%, rgba(59, 130, 246, 0.2) 70%);
    border-radius: 50%;
    position: relative;
    box-shadow: 0 0 60px rgba(59, 130, 246, 0.4);
}

.pulse-circle::before,
.pulse-circle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid rgba(59, 130, 246, 0.5);
    opacity: 0;
    animation: ripple 3s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

.pulse-circle::after {
    animation-delay: 1s;
}

@keyframes ripple {
    0% {
        width: 100%;
        height: 100%;
        opacity: 0.8;
    }

    100% {
        width: 300%;
        height: 300%;
        opacity: 0;
    }
}

/* Utilities Extended */
.text-left {
    text-align: left;
}

/* Mobile Menu Toggle Default */
.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
}


/* Services Section */
.services {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    position: relative;
    overflow: hidden;
    cursor: default;
}

.service-card:hover {
    transform: translateY(-5px);
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x) var(--mouse-y), rgba(255, 255, 255, 0.06), transparent 40%);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
}

.service-card:hover::before {
    opacity: 1;
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.service-card:hover .icon-box {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

.icon-box.red {
    background: rgba(225, 29, 72, 0.1);
    color: var(--color-secondary);
}

.service-card:hover .icon-box.red {
    background: var(--color-secondary);
    color: white;
    box-shadow: 0 0 20px rgba(225, 29, 72, 0.4);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

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

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text .section-subtitle {
    text-align: left;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.feature-list li i {
    color: var(--color-accent);
}

.tech-mockup {
    width: 100%;
    height: 400px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.1);
    position: relative;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.tech-mockup::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.05);
}

/* Footer */
footer {
    background: #000;
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-col h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-col h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-col p {
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-col a {
    display: block;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.footer-col a:hover {
    color: var(--color-primary);
    transform: translateX(5px);
    display: inline-block;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
    color: darken(var(--color-text-muted), 20%);
    font-size: 0.9rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
        order: 1;
        /* Place after logo */
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(2, 6, 23, 0.95);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        text-align: center;
    }

    .nav-links.active {
        display: flex;
    }

    .navbar .btn-primary {
        display: none;
        /* Hide global CTA on mobile nav to save space, or move into menu */
    }

    .hero-content,
    .about-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-text {
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
        line-height: 1.2;
    }

    .hero-text p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }

    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }

    .pulse-circle {
        width: 200px;
        height: 200px;
        margin-top: 3rem;
    }
}