/* ===================================
   Detexity - Counter-UAS Systems
   Professional Defense-Grade Website
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-bg-primary: #0d1117;
    --color-bg-secondary: #161b22;
    --color-bg-tertiary: #1c2128;
    --color-accent: #2D5975;
    --color-accent-light: #3d7a9e;
    --color-accent-dark: #1e3d4f;
    --color-alert: #d97706;
    --color-text-primary: #ebf2fe;
    --color-text-secondary: #8b949e;
    --color-text-muted: #6e7681;
    --color-border: #30363d;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 72px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* Brand Name Styling */
.brand-name {
    font-weight: 600;
    font-style: italic;
    color: var(--color-accent-light);
    letter-spacing: 0.02em;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(13, 17, 23, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: background-color var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.logo-img {
    height: 40px;
    width: auto;
}

.logo-img-small {
    height: 32px;
}

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

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

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

.nav-link-cta {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    border-radius: 4px;
    color: var(--color-text-primary);
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background-color: var(--color-accent-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.hero-tagline {
    font-size: var(--font-size-2xl);
    font-weight: 500;
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-xl);
    letter-spacing: 0.1em;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

/* Radar Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.radar-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.radar-ring {
    position: absolute;
    border: 1px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0.3;
}

.radar-ring-1 {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.radar-ring-2 {
    width: 66%;
    height: 66%;
    top: 17%;
    left: 17%;
}

.radar-ring-3 {
    width: 33%;
    height: 33%;
    top: 33.5%;
    left: 33.5%;
}

.radar-center {
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--color-accent);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px var(--color-accent);
}

.radar-sweep {
    position: absolute;
    width: 50%;
    height: 50%;
    top: 50%;
    left: 50%;
    transform-origin: 0 0;
    background: linear-gradient(90deg, transparent 0%, rgba(45, 89, 117, 0.4) 100%);
    animation: radar-sweep 4s linear infinite;
}

@keyframes radar-sweep {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: 4px;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    margin-top: var(--spacing-lg);
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-primary);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
    background-color: var(--color-accent);
}

/* Sections */
.section {
    padding: var(--spacing-4xl) 0;
}

.section-dark {
    background-color: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Cards */
.card {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-xl);
    transition: border-color var(--transition-base);
}

.card:hover {
    border-color: var(--color-accent);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent);
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.card-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Solution Section */
.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.solution-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-lg);
    line-height: 1.7;
}

.solution-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.solution-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    color: var(--color-text-secondary);
}

.solution-list-marker {
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
    margin-top: 8px;
    flex-shrink: 0;
}

/* Diagram */
.solution-diagram {
    display: flex;
    justify-content: center;
}

.diagram-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.diagram-node {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: 6px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-align: center;
    min-width: 140px;
}

.diagram-node-input {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
}

.diagram-node-core {
    background-color: var(--color-accent);
    color: var(--color-text-primary);
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-base);
}

.diagram-node-output {
    background-color: var(--color-accent-dark);
    border: 1px solid var(--color-accent);
}

.diagram-connector {
    width: 2px;
    height: 24px;
    background-color: var(--color-accent);
}

/* Steps */
.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
}

.step-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    min-width: 80px;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.step-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Technology Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.tech-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-xl);
}

.tech-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.tech-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.tech-specs {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-md);
}

.tech-specs li {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding: var(--spacing-xs) 0;
    font-family: 'SF Mono', 'Consolas', monospace;
}

/* Use Cases */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.use-case {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-xl);
    transition: border-color var(--transition-base);
}

.use-case:hover {
    border-color: var(--color-accent);
}

.use-case-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent);
}

.use-case-icon svg {
    width: 100%;
    height: 100%;
}

.use-case-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.use-case-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    font-size: var(--font-size-sm);
}

.use-case-benefits {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-md);
}

.use-case-benefits li {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.use-case-benefits li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    font-size: var(--font-size-lg);
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.value {
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border-left: 3px solid var(--color-accent);
}

.value-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.value-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Investors Section */
.investors-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.investor-block {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-xl);
}

.investor-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-light);
}

.investor-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.investor-points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.investor-points li {
    color: var(--color-text-secondary);
    padding-left: var(--spacing-lg);
    position: relative;
    font-size: var(--font-size-sm);
}

.investor-points li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.investor-cta {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.investor-cta p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-heading {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent-light);
}

.founders {
    margin-bottom: var(--spacing-2xl);
}

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

.founder-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.founder-role {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.email-protected {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.email-text {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    font-family: 'SF Mono', 'Consolas', monospace;
}

.email-reveal-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-text-primary);
    border: none;
    border-radius: 4px;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.email-reveal-btn:hover {
    background-color: var(--color-accent-light);
}

.contact-notice {
    display: flex;
    align-items: center;
}

.contact-notice p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.7;
    padding: var(--spacing-xl);
    border-left: 3px solid var(--color-accent);
    background-color: var(--color-bg-secondary);
}

.contact-response-info {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 6px;
}

.contact-response-info p {
    padding: 0;
    margin: 0;
    background: none;
    border: none;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

.contact-response-info .response-time {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.contact-response-info .nda-notice {
    font-style: italic;
}

/* Footer */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
}

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

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-visual {
        display: none;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .solution-content {
        grid-template-columns: 1fr;
    }

    .solution-diagram {
        order: -1;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .use-cases-grid {
        grid-template-columns: 1fr;
    }

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

    .investors-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background-color: var(--color-bg-primary);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .step {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .step-number {
        font-size: var(--font-size-2xl);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}