/* ═══════════════════════════════════════════════════════════════
   COSMIC FRONTIER — Stylesheet
   A Science Fiction Experience Beyond Tomorrow
   ═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────
   CSS Variables & Theme
   ───────────────────────────────────────────────────────────────── */
:root {
    /* Core Cosmic Palette */
    --void-black: #030308;
    --deep-space: #0a0a1a;
    --nebula-purple: #1a0a2e;
    --cosmic-blue: #0f1a3d;

    /* Accent Colors */
    --plasma-cyan: #00f5ff;
    --plasma-cyan-dim: #00f5ff40;
    --energy-orange: #ff6a00;
    --stellar-gold: #ffd700;
    --quantum-magenta: #ff00ff;
    --alien-green: #00ff88;

    /* Neutrals */
    --starlight: #ffffff;
    --nebula-fog: #a0a0c0;
    --dim-star: #606080;

    /* Gradients */
    --gradient-cosmic: linear-gradient(135deg, var(--nebula-purple) 0%, var(--cosmic-blue) 50%, var(--deep-space) 100%);
    --gradient-plasma: linear-gradient(90deg, var(--plasma-cyan), var(--quantum-magenta));
    --gradient-energy: linear-gradient(90deg, var(--energy-orange), var(--stellar-gold));

    /* Typography */
    --font-display: 'Exo 2', sans-serif;
    --font-body: 'Chakra Petch', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;

    /* Spacing */
    --section-padding: 120px;
    --content-max-width: 1400px;

    /* Effects */
    --glow-cyan: 0 0 30px var(--plasma-cyan-dim), 0 0 60px var(--plasma-cyan-dim);
    --glow-strong: 0 0 20px var(--plasma-cyan), 0 0 40px var(--plasma-cyan), 0 0 80px var(--plasma-cyan-dim);
}

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

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

body {
    font-family: var(--font-body);
    background: var(--void-black);
    color: var(--starlight);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ─────────────────────────────────────────────────────────────────
   Starfield Canvas Background
   ───────────────────────────────────────────────────────────────── */
#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: var(--void-black);
}

/* ─────────────────────────────────────────────────────────────────
   Scan Lines Overlay
   ───────────────────────────────────────────────────────────────── */
.scan-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 245, 255, 0.01) 2px,
        rgba(0, 245, 255, 0.01) 4px
    );
    animation: scanMove 8s linear infinite;
}

@keyframes scanMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(4px); }
}

/* ─────────────────────────────────────────────────────────────────
   Navigation
   ───────────────────────────────────────────────────────────────── */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    background: linear-gradient(180deg, rgba(3, 3, 8, 0.95) 0%, rgba(3, 3, 8, 0) 100%);
    backdrop-filter: blur(10px);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    color: var(--plasma-cyan);
    text-shadow: var(--glow-cyan);
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.logo-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--starlight);
}

.logo-text .accent {
    color: var(--plasma-cyan);
    text-shadow: var(--glow-cyan);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    position: relative;
    display: block;
    padding: 10px 20px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--nebula-fog);
    text-decoration: none;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-links a::before {
    content: attr(data-section);
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 8px;
    color: var(--dim-star);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    color: var(--plasma-cyan);
    border-color: var(--plasma-cyan-dim);
    background: rgba(0, 245, 255, 0.05);
}

.nav-links a:hover::before {
    opacity: 1;
}

.nav-status {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--alien-green);
    box-shadow: 0 0 10px var(--alien-green);
    animation: statusBlink 2s ease-in-out infinite;
}

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

.status-text {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--dim-star);
}

/* ─────────────────────────────────────────────────────────────────
   Hero Section
   ───────────────────────────────────────────────────────────────── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 40px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(26, 10, 46, 0.6) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(15, 26, 61, 0.6) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(0, 245, 255, 0.03) 0%, transparent 70%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    z-index: 2;
}

.hero-subtitle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--plasma-cyan);
    text-shadow: var(--glow-cyan);
}

.hero-subtitle .line {
    width: 60px;
    height: 1px;
    background: var(--gradient-plasma);
}

.hero-title {
    margin-bottom: 30px;
}

.hero-title .title-line {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(60px, 12vw, 140px);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -2px;
    text-transform: uppercase;
}

.hero-title .title-line.accent {
    color: var(--plasma-cyan);
    text-shadow: var(--glow-strong);
}

.hero-description {
    max-width: 600px;
    margin: 0 auto 50px;
    font-size: 18px;
    line-height: 1.8;
    color: var(--nebula-fog);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 50px;
    padding: 30px 0;
    border-top: 1px solid rgba(0, 245, 255, 0.1);
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--plasma-cyan);
    text-shadow: var(--glow-cyan);
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--dim-star);
    text-transform: uppercase;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 18px 40px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--void-black);
    text-decoration: none;
    background: var(--plasma-cyan);
    border: none;
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 15px 100%, 0 calc(100% - 15px));
    transition: all 0.3s ease;
    cursor: pointer;
}

.hero-cta:hover {
    background: var(--starlight);
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 245, 255, 0.3);
}

.hero-cta svg {
    animation: bounceDown 2s ease-in-out infinite;
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

/* Hero Visual - Planet */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    opacity: 0.6;
}

.planet {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 30% 30%, #4a2a7a 0%, #1a0a2e 50%, #0a0a1a 100%);
    box-shadow:
        inset -30px -30px 60px rgba(0, 0, 0, 0.8),
        0 0 60px rgba(138, 43, 226, 0.3);
}

.planet-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotateX(75deg);
    width: 350px;
    height: 350px;
    border: 2px solid rgba(0, 245, 255, 0.2);
    border-radius: 50%;
    animation: ringRotate 30s linear infinite;
}

.planet-ring::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border: 1px solid rgba(0, 245, 255, 0.1);
    border-radius: 50%;
}

@keyframes ringRotate {
    from { transform: translate(-50%, -50%) rotateX(75deg) rotateZ(0deg); }
    to { transform: translate(-50%, -50%) rotateX(75deg) rotateZ(360deg); }
}

.orbital {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px dashed rgba(0, 245, 255, 0.1);
    border-radius: 50%;
    animation: orbitSpin 20s linear infinite;
}

.orbital::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--plasma-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--plasma-cyan);
}

.orbital-1 {
    width: 300px;
    height: 300px;
    margin: -150px 0 0 -150px;
    animation-duration: 15s;
}
.orbital-1::after { top: 0; left: 50%; transform: translate(-50%, -50%); }

.orbital-2 {
    width: 400px;
    height: 400px;
    margin: -200px 0 0 -200px;
    animation-duration: 25s;
    animation-direction: reverse;
}
.orbital-2::after { top: 50%; right: 0; transform: translate(50%, -50%); }

.orbital-3 {
    width: 480px;
    height: 480px;
    margin: -240px 0 0 -240px;
    animation-duration: 35s;
}
.orbital-3::after { bottom: 0; left: 30%; transform: translate(-50%, 50%); }

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

/* ─────────────────────────────────────────────────────────────────
   Content Sections - Common Styles
   ───────────────────────────────────────────────────────────────── */
.content-section {
    position: relative;
    padding: var(--section-padding) 40px;
    overflow: hidden;
}

.content-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-cosmic);
    opacity: 0.3;
    z-index: -1;
}

.section-marker {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 60px;
}

.marker-number {
    font-family: var(--font-display);
    font-size: 72px;
    font-weight: 100;
    color: var(--plasma-cyan);
    opacity: 0.3;
    line-height: 1;
}

.marker-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--plasma-cyan-dim), transparent);
}

.marker-text {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--dim-star);
}

.section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    max-width: var(--content-max-width);
    margin: 0 auto;
    align-items: center;
}

.section-grid.reverse {
    direction: rtl;
}

.section-grid.reverse > * {
    direction: ltr;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 30px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

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

.section-title .accent {
    color: var(--plasma-cyan);
    text-shadow: var(--glow-cyan);
}

.section-intro {
    font-size: 18px;
    line-height: 1.9;
    color: var(--nebula-fog);
    margin-bottom: 40px;
}

.section-intro.centered {
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ─────────────────────────────────────────────────────────────────
   Artwork Frames
   ───────────────────────────────────────────────────────────────── */
.artwork-frame {
    position: relative;
    aspect-ratio: 1;
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.05) 0%, rgba(255, 0, 255, 0.02) 100%);
    border: 1px solid rgba(0, 245, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.artwork-frame::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid rgba(0, 245, 255, 0.1);
}

.artwork-frame::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 20px;
    border-top: 2px solid var(--plasma-cyan);
    border-left: 2px solid var(--plasma-cyan);
}

.artwork-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
}

.artwork-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding: 10px 15px;
    background: rgba(0, 245, 255, 0.05);
    border: 1px solid rgba(0, 245, 255, 0.1);
}

.label-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--nebula-fog);
}

.label-status {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--alien-green);
    animation: statusFlicker 3s ease-in-out infinite;
}

.label-status.warning {
    color: var(--energy-orange);
}

@keyframes statusFlicker {
    0%, 90%, 100% { opacity: 1; }
    95% { opacity: 0.5; }
}

/* ─────────────────────────────────────────────────────────────────
   Robotics Section
   ───────────────────────────────────────────────────────────────── */
.info-cards {
    display: grid;
    gap: 20px;
}

.info-card {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: rgba(0, 245, 255, 0.02);
    border: 1px solid rgba(0, 245, 255, 0.1);
    transition: all 0.3s ease;
}

.info-card:hover {
    background: rgba(0, 245, 255, 0.05);
    border-color: var(--plasma-cyan-dim);
    transform: translateX(10px);
}

.card-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    color: var(--plasma-cyan);
}

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

.info-card h3 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.info-card p {
    font-size: 14px;
    color: var(--nebula-fog);
    line-height: 1.6;
}

/* Robot Visual */
.robot-visual {
    position: relative;
    width: 200px;
    height: 280px;
}

.robot-head {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 60px;
    background: linear-gradient(180deg, #2a2a4a, #1a1a2e);
    border: 2px solid var(--plasma-cyan);
    border-radius: 10px 10px 5px 5px;
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.3);
}

.robot-visor {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 15px;
    background: linear-gradient(90deg, var(--plasma-cyan), var(--quantum-magenta), var(--plasma-cyan));
    border-radius: 2px;
    animation: visorScan 2s ease-in-out infinite;
}

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

.robot-eye {
    position: absolute;
    top: 15px;
    width: 12px;
    height: 12px;
    background: var(--plasma-cyan);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--plasma-cyan);
    animation: eyeBlink 4s ease-in-out infinite;
}

.robot-eye.left { left: 15px; }
.robot-eye.right { right: 15px; }

@keyframes eyeBlink {
    0%, 45%, 55%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.1); }
}

.robot-body {
    position: absolute;
    top: 90px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 130px;
    background: linear-gradient(180deg, #2a2a4a, #1a1a2e);
    border: 2px solid rgba(0, 245, 255, 0.5);
    clip-path: polygon(10% 0, 90% 0, 100% 10%, 100% 100%, 70% 100%, 60% 90%, 40% 90%, 30% 100%, 0 100%, 0 10%);
}

.robot-core {
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: radial-gradient(circle, var(--plasma-cyan), transparent);
    border-radius: 50%;
    animation: corePulse 2s ease-in-out infinite;
}

@keyframes corePulse {
    0%, 100% { transform: translateX(-50%) scale(1); opacity: 1; }
    50% { transform: translateX(-50%) scale(1.2); opacity: 0.7; }
}

.robot-arm {
    position: absolute;
    top: 100px;
    width: 20px;
    height: 80px;
    background: linear-gradient(180deg, #2a2a4a, #1a1a2e);
    border: 1px solid rgba(0, 245, 255, 0.3);
}

.robot-arm.left { left: 20px; transform: rotate(10deg); }
.robot-arm.right { right: 20px; transform: rotate(-10deg); }

.robot-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(0, 245, 255, 0.1), transparent 70%);
    animation: robotGlow 3s ease-in-out infinite;
}

@keyframes robotGlow {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

/* ─────────────────────────────────────────────────────────────────
   Physics Section
   ───────────────────────────────────────────────────────────────── */
.physics-concepts {
    display: grid;
    gap: 25px;
}

.concept {
    padding: 25px;
    background: rgba(255, 0, 255, 0.02);
    border: 1px solid rgba(255, 0, 255, 0.15);
    border-left: 3px solid var(--quantum-magenta);
    transition: all 0.3s ease;
}

.concept:hover {
    background: rgba(255, 0, 255, 0.05);
    transform: translateX(5px);
}

.concept-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 12px;
}

.concept-icon {
    font-size: 24px;
    color: var(--quantum-magenta);
    text-shadow: 0 0 10px var(--quantum-magenta);
}

.concept h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
}

.concept p {
    font-size: 14px;
    color: var(--nebula-fog);
    line-height: 1.7;
    margin-bottom: 15px;
}

.concept-meter {
    position: relative;
    height: 4px;
    background: rgba(255, 0, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.meter-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--fill);
    background: var(--gradient-plasma);
    border-radius: 2px;
    animation: meterGlow 2s ease-in-out infinite;
}

@keyframes meterGlow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.meter-label {
    position: absolute;
    right: 0;
    top: -20px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--dim-star);
}

/* Wormhole Visual */
.physics-visual {
    position: relative;
    width: 100%;
    height: 100%;
}

.wormhole {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
}

.wormhole-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 2px solid var(--quantum-magenta);
    border-radius: 50%;
    animation: wormholeRotate 10s linear infinite;
}

.wormhole-ring.r1 {
    width: 200px;
    height: 200px;
    margin: -100px 0 0 -100px;
    opacity: 0.2;
}

.wormhole-ring.r2 {
    width: 160px;
    height: 160px;
    margin: -80px 0 0 -80px;
    opacity: 0.4;
    animation-direction: reverse;
    animation-duration: 8s;
}

.wormhole-ring.r3 {
    width: 120px;
    height: 120px;
    margin: -60px 0 0 -60px;
    opacity: 0.6;
    animation-duration: 6s;
}

.wormhole-ring.r4 {
    width: 80px;
    height: 80px;
    margin: -40px 0 0 -40px;
    opacity: 0.8;
    animation-direction: reverse;
    animation-duration: 4s;
}

.wormhole-ring.r5 {
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    opacity: 1;
    animation-duration: 2s;
}

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

.wormhole-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, var(--quantum-magenta), var(--void-black));
    border-radius: 50%;
    box-shadow: 0 0 40px var(--quantum-magenta);
    animation: centerPulse 2s ease-in-out infinite;
}

@keyframes centerPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.3); }
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--plasma-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--plasma-cyan);
}

.particle.p1 { top: 20%; left: 30%; animation: particleFloat 5s ease-in-out infinite; }
.particle.p2 { top: 70%; left: 20%; animation: particleFloat 6s ease-in-out infinite 1s; }
.particle.p3 { top: 30%; right: 25%; animation: particleFloat 4s ease-in-out infinite 0.5s; }
.particle.p4 { bottom: 25%; right: 30%; animation: particleFloat 7s ease-in-out infinite 2s; }

@keyframes particleFloat {
    0%, 100% { transform: translate(0, 0); opacity: 0.5; }
    50% { transform: translate(20px, -20px); opacity: 1; }
}

/* ─────────────────────────────────────────────────────────────────
   AI Section
   ───────────────────────────────────────────────────────────────── */
.ai-section {
    background: radial-gradient(ellipse at center, rgba(0, 245, 255, 0.05) 0%, transparent 60%);
}

.ai-showcase {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

.ai-central {
    text-align: center;
    margin-bottom: 80px;
}

.ai-core {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto 50px;
}

.ai-nucleus {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: radial-gradient(circle, var(--plasma-cyan), var(--cosmic-blue));
    border-radius: 50%;
    box-shadow: 0 0 50px var(--plasma-cyan), 0 0 100px rgba(0, 245, 255, 0.3);
    animation: nucleusPulse 3s ease-in-out infinite;
}

@keyframes nucleusPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); box-shadow: 0 0 50px var(--plasma-cyan), 0 0 100px rgba(0, 245, 255, 0.3); }
    50% { transform: translate(-50%, -50%) scale(1.2); box-shadow: 0 0 80px var(--plasma-cyan), 0 0 150px rgba(0, 245, 255, 0.5); }
}

.ai-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid rgba(0, 245, 255, 0.3);
    border-radius: 50%;
}

.ai-orbit span {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--plasma-cyan);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--plasma-cyan);
}

.ai-orbit.o1 {
    width: 80px;
    height: 80px;
    margin: -40px 0 0 -40px;
    animation: aiOrbitSpin 5s linear infinite;
}
.ai-orbit.o1 span { top: -5px; left: 50%; transform: translateX(-50%); }

.ai-orbit.o2 {
    width: 130px;
    height: 130px;
    margin: -65px 0 0 -65px;
    animation: aiOrbitSpin 8s linear infinite reverse;
}
.ai-orbit.o2 span:first-child { top: 50%; left: -5px; transform: translateY(-50%); }
.ai-orbit.o2 span:last-child { top: 50%; right: -5px; transform: translateY(-50%); }

.ai-orbit.o3 {
    width: 180px;
    height: 180px;
    margin: -90px 0 0 -90px;
    animation: aiOrbitSpin 12s linear infinite;
}
.ai-orbit.o3 span:nth-child(1) { top: -5px; left: 50%; transform: translateX(-50%); }
.ai-orbit.o3 span:nth-child(2) { bottom: 20px; left: 10px; }
.ai-orbit.o3 span:nth-child(3) { bottom: 20px; right: 10px; }

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

.ai-nodes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.ai-node {
    position: relative;
    padding: 30px;
    background: rgba(0, 245, 255, 0.02);
    border: 1px solid rgba(0, 245, 255, 0.15);
    text-align: center;
    transition: all 0.4s ease;
}

.ai-node:hover {
    background: rgba(0, 245, 255, 0.08);
    border-color: var(--plasma-cyan);
    transform: translateY(-10px);
}

.node-pulse {
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--plasma-cyan);
    box-shadow: 0 0 20px var(--plasma-cyan);
}

.node-content h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 15px;
    color: var(--plasma-cyan);
}

.node-content p {
    font-size: 13px;
    color: var(--nebula-fog);
    line-height: 1.7;
    margin-bottom: 20px;
}

.node-stat {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--alien-green);
    padding: 8px 15px;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.2);
}

/* ─────────────────────────────────────────────────────────────────
   Aliens Section
   ───────────────────────────────────────────────────────────────── */
.aliens-section::before {
    background: radial-gradient(ellipse at 70% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
}

.species-list {
    display: grid;
    gap: 25px;
}

.species {
    display: flex;
    gap: 25px;
    padding: 25px;
    background: rgba(0, 255, 136, 0.02);
    border: 1px solid rgba(0, 255, 136, 0.15);
    transition: all 0.3s ease;
}

.species:hover {
    background: rgba(0, 255, 136, 0.05);
    border-color: var(--alien-green);
    transform: translateX(10px);
}

.species-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.species-icon.silicon {
    background: linear-gradient(135deg, #8b5cf6, #06b6d4);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.species-icon.plasma {
    background: linear-gradient(135deg, #f97316, #fbbf24);
    box-shadow: 0 0 20px rgba(249, 115, 22, 0.5);
    animation: plasmaGlow 2s ease-in-out infinite;
}

@keyframes plasmaGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(249, 115, 22, 0.5); }
    50% { box-shadow: 0 0 40px rgba(249, 115, 22, 0.8); }
}

.species-icon.collective {
    background: linear-gradient(135deg, var(--alien-green), #22d3ee);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
}

.species-info h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 5px;
}

.species-origin {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--alien-green);
    display: block;
    margin-bottom: 10px;
}

.species-info p {
    font-size: 14px;
    color: var(--nebula-fog);
    line-height: 1.6;
}

/* Alien Visual */
.alien-frame {
    background: radial-gradient(ellipse at center, rgba(0, 255, 136, 0.05) 0%, transparent 70%);
}

.alien-visual {
    position: relative;
    width: 200px;
    height: 300px;
}

.alien-form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.alien-head {
    width: 100px;
    height: 140px;
    background: linear-gradient(180deg, rgba(0, 255, 136, 0.3), rgba(0, 255, 136, 0.1));
    border-radius: 50% 50% 40% 40%;
    position: relative;
}

.alien-eyes {
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
}

.alien-eye {
    width: 20px;
    height: 30px;
    background: #000;
    border-radius: 50%;
    box-shadow: inset 0 0 10px var(--alien-green);
    animation: alienBlink 5s ease-in-out infinite;
}

.alien-eye:nth-child(2) {
    animation-delay: 0.1s;
}

.alien-eye:nth-child(3) {
    animation-delay: 0.2s;
}

@keyframes alienBlink {
    0%, 90%, 100% { transform: scaleY(1); }
    95% { transform: scaleY(0.1); }
}

.alien-tendrils {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
}

.tendril {
    position: absolute;
    bottom: 0;
    width: 8px;
    height: 60px;
    background: linear-gradient(180deg, rgba(0, 255, 136, 0.3), transparent);
    border-radius: 4px;
    transform-origin: top center;
}

.tendril.t1 { left: 0; animation: tendrilSway 3s ease-in-out infinite; }
.tendril.t2 { left: 25px; animation: tendrilSway 3s ease-in-out infinite 0.5s; }
.tendril.t3 { right: 25px; animation: tendrilSway 3s ease-in-out infinite 1s; }
.tendril.t4 { right: 0; animation: tendrilSway 3s ease-in-out infinite 1.5s; }

@keyframes tendrilSway {
    0%, 100% { transform: rotate(-10deg); }
    50% { transform: rotate(10deg); }
}

.alien-aura {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 350px;
    background: radial-gradient(ellipse, rgba(0, 255, 136, 0.1), transparent 70%);
    animation: auraBreath 4s ease-in-out infinite;
}

@keyframes auraBreath {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 1; }
}

/* ─────────────────────────────────────────────────────────────────
   Space Exploration Section
   ───────────────────────────────────────────────────────────────── */
.space-section {
    position: relative;
    padding: 0;
}

.space-panorama {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--section-padding) 40px;
    overflow: hidden;
}

.panorama-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.nebula {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.nebula.n1 {
    top: 10%;
    left: 20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(138, 43, 226, 0.3), transparent);
    animation: nebulaDrift 20s ease-in-out infinite;
}

.nebula.n2 {
    bottom: 20%;
    right: 10%;
    width: 500px;
    height: 300px;
    background: radial-gradient(ellipse, rgba(0, 245, 255, 0.2), transparent);
    animation: nebulaDrift 25s ease-in-out infinite reverse;
}

@keyframes nebulaDrift {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -20px); }
}

.space-content {
    position: relative;
    z-index: 2;
    max-width: var(--content-max-width);
}

.space-section .section-marker {
    position: absolute;
    top: 40px;
    left: 40px;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.mission-card {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(0, 245, 255, 0.2);
    backdrop-filter: blur(10px);
    overflow: hidden;
    transition: all 0.4s ease;
}

.mission-card:hover {
    border-color: var(--plasma-cyan);
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 245, 255, 0.2);
}

.mission-visual {
    height: 150px;
    background: linear-gradient(180deg, rgba(0, 245, 255, 0.05), transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.ship {
    width: 80px;
    height: 40px;
    position: relative;
}

.ship::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-left: 40px solid var(--plasma-cyan);
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    filter: drop-shadow(0 0 10px var(--plasma-cyan));
}

.ship::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 40px;
    transform: translateY(-50%);
    width: 30px;
    height: 6px;
    background: linear-gradient(90deg, var(--energy-orange), transparent);
    animation: thrusterBurn 0.5s ease-in-out infinite;
}

@keyframes thrusterBurn {
    0%, 100% { opacity: 1; width: 30px; }
    50% { opacity: 0.5; width: 40px; }
}

.ship-2::before {
    border-left-color: var(--stellar-gold);
    filter: drop-shadow(0 0 10px var(--stellar-gold));
}

.ship-3::before {
    border-left: none;
    width: 60px;
    height: 60px;
    background: var(--quantum-magenta);
    border-radius: 50%;
    box-shadow: 0 0 30px var(--quantum-magenta);
}

.ship-3::after {
    display: none;
}

.mission-data {
    padding: 25px;
}

.mission-class {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--dim-star);
    display: block;
    margin-bottom: 8px;
}

.mission-data h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.mission-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 20px;
}

.m-stat {
    display: flex;
    flex-direction: column;
}

.m-value {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--plasma-cyan);
}

.m-label {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 1px;
    color: var(--dim-star);
    text-transform: uppercase;
}

.mission-progress {
    position: relative;
}

.progress-bar {
    height: 4px;
    background: rgba(0, 245, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar::after {
    content: '';
    display: block;
    height: 100%;
    width: var(--progress);
    background: var(--gradient-plasma);
    border-radius: 2px;
}

.mission-progress span {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--alien-green);
}

/* ─────────────────────────────────────────────────────────────────
   Future Civilizations Section
   ───────────────────────────────────────────────────────────────── */
.civ-section {
    background: linear-gradient(180deg, var(--void-black), var(--nebula-purple) 50%, var(--void-black));
}

.civ-timeline {
    max-width: var(--content-max-width);
    margin: 0 auto;
}

.timeline-track {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 80px;
    position: relative;
}

.timeline-track::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--plasma-cyan), var(--quantum-magenta), var(--energy-orange), transparent);
}

.timeline-item {
    position: relative;
}

.timeline-marker {
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
    border-radius: 50%;
    border: 2px solid var(--plasma-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--void-black);
    position: relative;
    z-index: 2;
}

.timeline-era {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--plasma-cyan);
    text-shadow: var(--glow-cyan);
}

.timeline-item:nth-child(2) .timeline-marker {
    border-color: var(--quantum-magenta);
}

.timeline-item:nth-child(2) .timeline-era {
    color: var(--quantum-magenta);
    text-shadow: 0 0 20px var(--quantum-magenta);
}

.timeline-item:nth-child(3) .timeline-marker {
    border-color: var(--energy-orange);
}

.timeline-item:nth-child(3) .timeline-era {
    color: var(--energy-orange);
    text-shadow: 0 0 20px var(--energy-orange);
}

.timeline-content {
    text-align: center;
    padding: 30px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-content h3 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--dim-star);
    display: block;
    margin-bottom: 15px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--nebula-fog);
    line-height: 1.7;
    margin-bottom: 30px;
}

.civ-visual {
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Type I - Planet */
.planet-earth {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1e3a5f, #2e5a7f, #1e4a6f);
    box-shadow: inset -10px -10px 20px rgba(0, 0, 0, 0.5);
}

.earth-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 10px, rgba(0, 245, 255, 0.1) 10px, rgba(0, 245, 255, 0.1) 11px),
        repeating-linear-gradient(90deg, transparent, transparent 10px, rgba(0, 245, 255, 0.1) 10px, rgba(0, 245, 255, 0.1) 11px);
    animation: gridRotate 20s linear infinite;
}

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

.earth-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 245, 255, 0.2), transparent 70%);
    animation: earthPulse 3s ease-in-out infinite;
}

@keyframes earthPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

/* Type II - Dyson Sphere */
.dyson-sphere {
    position: relative;
    width: 120px;
    height: 120px;
}

.dyson-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 2px solid var(--quantum-magenta);
    border-radius: 50%;
    opacity: 0.6;
}

.dyson-ring.dr1 {
    width: 120px;
    height: 120px;
    margin: -60px 0 0 -60px;
    animation: dysonRotate 10s linear infinite;
}

.dyson-ring.dr2 {
    width: 100px;
    height: 100px;
    margin: -50px 0 0 -50px;
    transform: rotateX(60deg);
    animation: dysonRotate 8s linear infinite reverse;
}

.dyson-ring.dr3 {
    width: 80px;
    height: 80px;
    margin: -40px 0 0 -40px;
    transform: rotateY(60deg);
    animation: dysonRotate 6s linear infinite;
}

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

.dyson-star {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, #fff, var(--stellar-gold));
    border-radius: 50%;
    box-shadow: 0 0 40px var(--stellar-gold), 0 0 80px rgba(255, 215, 0, 0.5);
    animation: starFlare 2s ease-in-out infinite;
}

@keyframes starFlare {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
}

/* Type III - Galaxy */
.galaxy {
    position: relative;
    width: 120px;
    height: 120px;
    animation: galaxySpin 30s linear infinite;
}

.galaxy-arm {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50px;
    height: 8px;
    background: linear-gradient(90deg, rgba(255, 106, 0, 0.8), transparent);
    border-radius: 4px;
    transform-origin: left center;
    filter: blur(2px);
}

.galaxy-arm.a1 { transform: rotate(0deg); }
.galaxy-arm.a2 { transform: rotate(90deg); }
.galaxy-arm.a3 { transform: rotate(180deg); }
.galaxy-arm.a4 { transform: rotate(270deg); }

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

.galaxy-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 25px;
    height: 25px;
    background: radial-gradient(circle, #fff, var(--energy-orange));
    border-radius: 50%;
    box-shadow: 0 0 30px var(--energy-orange), 0 0 60px rgba(255, 106, 0, 0.5);
}

/* ─────────────────────────────────────────────────────────────────
   Footer
   ───────────────────────────────────────────────────────────────── */
.main-footer {
    padding: 80px 40px 40px;
    background: linear-gradient(180deg, transparent, var(--void-black));
}

.footer-content {
    max-width: var(--content-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    align-items: center;
    padding-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-transmission {
    text-align: center;
}

.transmission-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 3px;
    color: var(--dim-star);
    margin-bottom: 8px;
}

.transmission-value {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--plasma-cyan);
}

.footer-signature {
    text-align: right;
}

.footer-signature p {
    font-size: 14px;
    color: var(--nebula-fog);
    margin-bottom: 10px;
}

.footer-coords {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--dim-star);
}

.footer-border {
    display: flex;
    gap: 10px;
    max-width: var(--content-max-width);
    margin: 0 auto;
}

.border-segment {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--plasma-cyan-dim), transparent);
}

/* ─────────────────────────────────────────────────────────────────
   Responsive Design
   ───────────────────────────────────────────────────────────────── */
@media (max-width: 1200px) {
    .ai-nodes {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline-track {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .timeline-track::before {
        display: none;
    }
}

@media (max-width: 992px) {
    .section-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .section-grid.reverse {
        direction: ltr;
    }

    .section-artwork {
        order: -1;
    }

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

    .hero-visual {
        display: none;
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .main-nav {
        padding: 15px 20px;
    }

    .hero {
        padding: 80px 20px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }

    .content-section {
        padding: var(--section-padding) 20px;
    }

    .ai-nodes {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-signature {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .marker-number {
        font-size: 48px;
    }

    .section-title {
        font-size: 28px;
    }

    .info-card {
        flex-direction: column;
        text-align: center;
    }

    .species {
        flex-direction: column;
        text-align: center;
    }
}