/* ============================================
   Infyrno LLC — Aerospace R&D Website Styles
   Mobile-First | CSS3 | Inter Font
   ============================================ */

/* CSS Variables */
:root {
    --bg-color: #000000;
    --primary-accent: #FF0065;
    --secondary-accent: #7B2FBE;
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-muted: rgba(255, 255, 255, 0.5);
    --overlay-dark: rgba(0, 0, 0, 0.55);
    --header-bg: rgba(0, 0, 0, 0.85);
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s ease;
    --max-width: 1200px;
    --section-padding-y: 100px;
    --section-padding-x: 24px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -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;
}

/* Screen-reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Header
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-fast), backdrop-filter var(--transition-fast);
    padding: 0 var(--section-padding-x);
}

.site-header.scrolled {
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo img {
    height: 28px;
    width: auto;
}

.main-nav {
    display: none;
    gap: 32px;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link:focus-visible {
    color: var(--text-primary);
    outline: 2px solid var(--primary-accent);
    outline-offset: 4px;
    border-radius: 2px;
}

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

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    border-radius: 4px;
}

.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--primary-accent);
    outline-offset: 4px;
}

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

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Overlay */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 999;
}

.mobile-nav.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-nav-link {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

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

.mobile-nav-link:focus-visible {
    color: var(--primary-accent);
    outline: 2px solid var(--primary-accent);
    outline-offset: 4px;
    border-radius: 2px;
}

/* Body scroll lock when mobile nav is open */
body.nav-open {
    overflow: hidden;
    touch-action: none;
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    width: 100%;
    height: 75vh;
    position: relative;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

@supports not (object-fit: cover) {
    .hero-video {
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        min-width: 100%;
        min-height: 100%;
        width: auto;
        height: auto;
    }
}

.hero-content {
    position: relative;
    z-index: 10;
}

/* ============================================
   Reveal Animations (Intersection Observer)
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    will-change: opacity, transform;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   The Machine Paradigm Section
   ============================================ */
.machine-paradigm {
    position: relative;
    padding: var(--section-padding-y) var(--section-padding-x);
    overflow: hidden;
}

.parallax-bg {
    position: absolute;
    inset: -50px;
    background-image: url('../assets/high-energy-arc-background.jpg');
    background-size: cover;
    background-position: center -220px;
    will-change: transform;
    z-index: 0;
}

.parallax-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--overlay-dark);
    z-index: 1;
}

.machine-paradigm .section-inner {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    margin: 0 auto;
}

.machine-paradigm .section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    text-align: center;
    color: white;
    padding-bottom: 80px;
    letter-spacing: -0.02em;
}

.intro-copy {
    font-size: clamp(1.0625rem, 2.2vw, 1.375rem);
    font-weight: 400;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Feature Blocks */
.feature-blocks {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
}

.feature-block {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    width: 85%;
    margin: 0 auto;
}

.feature-image-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    aspect-ratio: 1 / 1;
    width: 100%;
}

.feature-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.feature-image-wrapper:hover .feature-image {
    transform: scale(1.05);
}

/* Shine Sweep Effect */
.shine-sweep {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    border-radius: 12px;
}

.shine-sweep::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent 30%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 70%
    );
    transform: skewX(-20deg);
    transition: left 0.6s ease;
}

.feature-image-wrapper:hover .shine-sweep::after {
    left: 150%;
}

.feature-title {
    font-size: clamp(1.625rem, 3vw, 2.125rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    width: 100%;
    text-align: center;
}

.feature-bullets {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
}

.bullet {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    padding-left: 24px;
    position: relative;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease, transform 0.5s ease, color var(--transition-fast);
}

.bullet.visible {
    opacity: 1;
    transform: translateY(0);
}

.bullet::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background-color: var(--primary-accent);
    border-radius: 50%;
    transform: scale(0);
    transition: transform 0.4s ease;
}

.bullet.visible::before {
    transform: scale(1);
}

/* ============================================
   About & Join Us Sections
   ============================================ */
.about,
.join-us {
    padding: var(--section-padding-y) var(--section-padding-x);
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.two-column {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.column {
    flex: 1;
}

.graphic-column {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.about .section-title,
.join-us .section-title,
.contact .section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.body-copy {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 540px;
}

.accent-link {
    color: var(--primary-accent);
    font-weight: 600;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.accent-link:hover {
    border-bottom-color: var(--primary-accent);
}

.accent-link:focus-visible {
    outline: 2px solid var(--primary-accent);
    outline-offset: 4px;
    border-radius: 2px;
}

/* About Graphic — Option A (Animated SVG) */
.about-graphic.option-a {
    width: 100%;
    max-width: 360px;
    height: auto;
}

.orbit-ring {
    transform-origin: center;
    transform-box: fill-box;
    animation: orbitRotate linear infinite;
}

.orbit-1 {
    animation-duration: 30s;
}

.orbit-2 {
    animation-duration: 20s;
    animation-direction: reverse;
}

.orbit-3 {
    animation-duration: 12s;
}

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

.spacecraft-body,
.spacecraft-wing {
    transform-box: fill-box;
    animation: spacecraftFloat 4s ease-in-out infinite;
}

@keyframes spacecraftFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-6px);
    }
}

.orbital-node {
    transform-box: fill-box;
    animation: nodePulse 3s ease-in-out infinite;
}

.orbital-node:nth-child(2n) {
    animation-delay: 1s;
}

.orbital-node:nth-child(3n) {
    animation-delay: 2s;
}

@keyframes nodePulse {
    0%, 100% {
        opacity: 0.8;
        transform: scale(1);
    }
    50% {
        opacity: 0.4;
        transform: scale(1.3);
    }
}

/* About Graphic — Option B (Static CSS) [Commented Out in HTML] */
.about-graphic.option-b {
    position: relative;
    width: 300px;
    height: 300px;
}

.arc-ring {
    position: absolute;
    border-radius: 50%;
    border: 2px solid transparent;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.arc-outer {
    width: 280px;
    height: 280px;
    border-color: rgba(123, 47, 190, 0.3);
    border-top-color: var(--secondary-accent);
}

.arc-middle {
    width: 200px;
    height: 200px;
    border-color: rgba(255, 0, 101, 0.3);
    border-right-color: var(--primary-accent);
}

.arc-inner {
    width: 120px;
    height: 120px;
    border-color: rgba(123, 47, 190, 0.4);
    border-bottom-color: var(--secondary-accent);
}

.arc-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background-color: var(--primary-accent);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 0, 101, 0.5);
}

/* Join Us Graphic — Option A (Animated SVG) */
.join-graphic.option-a {
    width: 100%;
    max-width: 360px;
    height: auto;
}

.trajectory-arc {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    animation: drawArc 2.5s ease-out forwards;
}

.reveal.visible .trajectory-arc {
    animation: drawArc 2.5s ease-out forwards;
}

@keyframes drawArc {
    to {
        stroke-dashoffset: 0;
    }
}

/* Join Us Graphic — Option B (Static CSS) [Commented Out in HTML] */
.join-graphic.option-b {
    position: relative;
    width: 300px;
    height: 300px;
}

.trajectory-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.trajectory-main {
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: var(--primary-accent);
    border-right-color: var(--secondary-accent);
    transform: rotate(-45deg);
}

.trajectory-dashed {
    position: absolute;
    bottom: 40px;
    left: 40px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    border: 1px dashed rgba(123, 47, 190, 0.4);
}

.trajectory-launch {
    position: absolute;
    bottom: 10px;
    left: 10px;
    width: 16px;
    height: 16px;
    background-color: var(--primary-accent);
    border-radius: 50%;
    box-shadow: 0 0 12px rgba(255, 0, 101, 0.5);
}

.trajectory-apex {
    position: absolute;
    top: 20px;
    right: 40px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 14px solid var(--primary-accent);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: var(--section-padding-y) var(--section-padding-x);
    text-align: center;
}

.contact .section-inner {
    max-width: 600px;
    margin: 0 auto;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 1.0625rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    word-break: break-word;
}

.contact-item:hover {
    color: var(--text-primary);
}

.contact-item:focus-visible {
    color: var(--text-primary);
    outline: 2px solid var(--primary-accent);
    outline-offset: 4px;
    border-radius: 2px;
}

.contact-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--primary-accent);
}

/* ============================================
   Illustrations Gallery
   ============================================ */
.illustrations {
    padding: 72px var(--section-padding-x) 28px;
}

.illustration-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    justify-items: center;
}

.illustration-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 135px;
    aspect-ratio: 1 / 1;
}

.illustration-svg {
    width: 100%;
    height: 100%;
}

/* Animations */
.illustration-float {
    animation: illustrationFloat 6s ease-in-out infinite;
}

@keyframes illustrationFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.illustration-pulse {
    animation: illustrationPulse 3s ease-in-out infinite;
}

@keyframes illustrationPulse {
    0%, 100% { opacity: 0.85; }
    50% { opacity: 0.5; }
}

.illustration-rotate {
    animation: illustrationRotate 40s linear infinite;
    transform-box: fill-box;
    transform-origin: center;
}

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

.illustration-drift {
    animation: illustrationDrift 8s ease-in-out infinite;
}

@keyframes illustrationDrift {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(6px); }
}

.illustration-dash {
    stroke-dasharray: 6 4;
    animation: illustrationDash 3s linear infinite;
}

@keyframes illustrationDash {
    to { stroke-dashoffset: -20; }
}

.illustration-scale {
    animation: illustrationScale 5s ease-in-out infinite;
    transform-box: fill-box;
    transform-origin: center;
}

@keyframes illustrationScale {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.04); }
}

.illustration-swing {
    animation: illustrationSwing 7s ease-in-out infinite;
    transform-box: fill-box;
    transform-origin: center top;
}

@keyframes illustrationSwing {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(2deg); }
    75% { transform: rotate(-2deg); }
}

.illustration-counter-rotate {
    animation: illustrationCounterRotate 30s linear infinite;
    transform-box: fill-box;
    transform-origin: center;
}

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

.illustration-twinkle circle {
    animation: illustrationTwinkle 2s ease-in-out infinite;
}

.illustration-twinkle circle:nth-child(8)  { animation-delay: 0s; }
.illustration-twinkle circle:nth-child(9)  { animation-delay: 0.3s; }
.illustration-twinkle circle:nth-child(10) { animation-delay: 0.6s; }
.illustration-twinkle circle:nth-child(11) { animation-delay: 0.9s; }
.illustration-twinkle circle:nth-child(12) { animation-delay: 1.2s; }
.illustration-twinkle circle:nth-child(13) { animation-delay: 1.5s; }
.illustration-twinkle circle:nth-child(14) { animation-delay: 1.8s; }

@keyframes illustrationTwinkle {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 0.2; }
}

.illustration-glow {
    animation: illustrationGlow 4s ease-in-out infinite;
}

@keyframes illustrationGlow {
    0%, 100% { filter: drop-shadow(0 0 2px rgba(255, 0, 101, 0)); }
    50% { filter: drop-shadow(0 0 6px rgba(255, 0, 101, 0.5)); }
}

/* ============================================
   Abstract Mathematical 3D Shapes
   ============================================ */
.abstract {
    padding: var(--section-padding-y) var(--section-padding-x);
}

.abstract-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    justify-items: center;
}

.abstract-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 220px;
    aspect-ratio: 1 / 1;
}

/* ============================================
   Volumetric SVG Gallery
   ============================================ */
.volumetric-gallery {
    padding: var(--section-padding-y) var(--section-padding-x);
}

.volumetric-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    justify-items: center;
}

.volumetric-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 220px;
    aspect-ratio: 1 / 1;
}

/* ============================================
   True 3D Three.js Gallery
   ============================================ */
.threejs-gallery {
    padding: var(--section-padding-y) var(--section-padding-x);
}

.threejs-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    justify-items: center;
}

.threejs-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 220px;
    aspect-ratio: 1 / 1;
    background: radial-gradient(circle at center, rgba(123, 47, 190, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.1s ease-out;
}

.threejs-item canvas {
    width: 100% !important;
    height: 100% !important;
    outline: none;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    padding: 40px var(--section-padding-x);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================
   Tablet (768px+)
   ============================================ */
@media (min-width: 768px) {
    :root {
        --section-padding-x: 40px;
        --section-padding-y: 120px;
    }

    .main-nav {
        display: flex;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .two-column {
        flex-direction: row;
        align-items: center;
        gap: 64px;
    }

    .mirrored .text-column {
        order: 1;
    }

    .mirrored .graphic-column {
        order: 2;
    }

    .feature-blocks {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }

    .contact-details {
        gap: 20px;
    }

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

    .abstract-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .volumetric-grid,
    .threejs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Desktop (1024px+)
   ============================================ */
@media (min-width: 1024px) {
    :root {
        --section-padding-x: 48px;
        --section-padding-y: 140px;
    }

    .header-inner {
        height: 80px;
    }

    .logo img {
        height: 36px;
    }

    .feature-blocks {
        gap: 48px;
    }

    .two-column {
        gap: 80px;
    }

    .graphic-column {
        min-height: 400px;
    }

    .about-graphic.option-a,
    .join-graphic.option-a {
        max-width: 420px;
    }

    .contact-details {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 40px;
    }

    .illustration-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}