:root {
    --bg-dark: #05070a;
    --accent-blue: #00f2ff;
    --accent-purple: #7000ff;
    --text-main: #e0e0e0;
    --text-dim: #a0a0a0;
    --glass-bg: rgba(15, 20, 30, 0.8);
    --glass-border: rgba(255, 255, 255, 0.15);
    --neon-shadow: 0 0 20px rgba(0, 242, 255, 0.4);
    --transition-smooth: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
    cursor: none; /* Custom cursor */
}

/* Custom Cursor */
.cursor {
    width: 10px;
    height: 10px;
    background: var(--accent-blue);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 10000;
    transition: transform 0.1s ease;
}

.cursor-follower {
    width: 30px;
    height: 30px;
    border: 1px solid var(--accent-blue);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.15s ease, width 0.3s, height 0.3s;
}

/* Nebula Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(112, 0, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 242, 255, 0.1) 0%, transparent 40%);
    z-index: -1;
    animation: nebulaMove 20s infinite alternate;
}

@keyframes nebulaMove {
    from { transform: scale(1); }
    to { transform: scale(1.2); }
}

h1, h2, h3 {
    font-family: 'Space Grotesk', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-purple);
    border-radius: 10px;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.8s ease;
}

.loader {
    text-align: center;
}

.planet-ring {
    width: 80px;
    height: 80px;
    border: 4px solid var(--accent-blue);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.progress-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: 10px;
    overflow: hidden;
}

#progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    transition: width 0.3s ease;
}

/* Navigation */
.glass-nav {
    position: fixed;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    height: 75px;
    background: rgba(15, 20, 30, 0.4);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    z-index: 1000;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), inset 0 0 10px rgba(255,255,255,0.05);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-blue);
}

.pulse {
    width: 12px;
    height: 12px;
    background: var(--accent-blue);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-blue);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    70% { transform: scale(1.1); opacity: 0.2; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-main);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-blue);
    transition: var(--transition-smooth);
}

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

#open-config {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    filter: drop-shadow(0 0 5px var(--accent-blue));
    transition: transform 0.3s ease;
}

#open-config:hover {
    transform: rotate(45deg);
}

/* Sections Base */
section {
    min-height: 100vh;
    padding: 100px 5%;
    position: relative;
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a2e 0%, #05070a 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background-image: 
        radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px);
    background-size: 550px 550px, 350px 350px;
    background-position: 0 0, 40px 60px;
    opacity: 0.3;
    animation: starsRotate 100s linear infinite;
}

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

.glitch-text {
    font-size: 6rem;
    font-weight: 800;
    margin-bottom: 20px;
    position: relative;
    background: linear-gradient(135deg, #fff 0%, var(--accent-blue) 50%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-dim);
    max-width: 600px;
    margin-bottom: 40px;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 30px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 5px 20px rgba(112, 0, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(112, 0, 255, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 1px solid var(--glass-border);
    padding: 15px 40px;
    border-radius: 30px;
    font-weight: 700;
    cursor: pointer;
    backdrop-filter: blur(5px);
    transition: var(--transition-smooth);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-blue);
}

/* Scene Container */
.scene-container {
    padding: 0;
    position: relative;
}

#three-canvas-container {
    width: 100%;
    height: 100vh;
    background: #000;
}

.controls-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-dim);
    pointer-events: none;
}

/* Planet Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

#planet-panel {
    position: absolute;
    top: 100px;
    right: 30px;
    width: 350px;
    padding: 30px;
    z-index: 100;
    transition: var(--transition-smooth);
    transform: translateX(0);
}

#planet-panel.hidden {
    transform: translateX(400px);
    opacity: 0;
    pointer-events: none;
}

.close-panel {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.5rem;
    cursor: pointer;
}

.panel-header h2 {
    font-size: 2rem;
    margin-bottom: 5px;
    color: var(--accent-blue);
}

#planet-type {
    font-size: 0.8rem;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.panel-body {
    margin-top: 20px;
}

#planet-description {
    font-size: 0.95rem;
    margin-bottom: 25px;
    color: #ccc;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 25px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px;
    border-radius: 12px;
}

.stat-card label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-dim);
}

.stat-card span {
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
}

.fun-facts h3 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.fun-facts ul {
    list-style: none;
}

.fun-facts li {
    font-size: 0.9rem;
    color: #ccc;
    position: relative;
    padding-left: 15px;
    margin-bottom: 8px;
}

.fun-facts li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
}

/* NASA Live Section */
.data-section {
    background: linear-gradient(to bottom, #000, #0a0a1a);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.nasa-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 35px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
    box-shadow: 0 15px 40px rgba(0, 242, 255, 0.1);
}

.glass-card h3 {
    margin-bottom: 20px;
    color: var(--accent-blue);
    font-size: 1.2rem;
}

.apod-card #apod-container img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 16px;
    margin: 20px 0;
    box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    transition: transform 0.5s ease;
}

.apod-card:hover img {
    transform: scale(1.02);
}

.nasa-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.epic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.epic-grid img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.weather-card #mars-weather {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
}

.weather-stat {
    text-align: center;
}

.weather-stat label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
}

.weather-stat span {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-blue);
}

/* Quiz Section */
.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 50px;
    text-align: center;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.quiz-option {
    display: block;
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: white;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.quiz-option:hover {
    background: var(--accent-purple);
    border-color: white;
}

#neo-table {
    width: 100%;
    border-collapse: collapse;
}

#neo-table th {
    text-align: left;
    padding: 10px;
    border-bottom: 1px solid var(--glass-border);
    color: var(--accent-blue);
    font-size: 0.8rem;
}

#neo-table td {
    padding: 15px 10px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 0.9rem;
}

/* Mars Gallery */
.mars-gallery-container {
    position: relative;
    margin-top: 20px;
}

.gallery-slider {
    display: flex;
    overflow-x: hidden;
    gap: 20px;
    scroll-behavior: smooth;
}

.gallery-item {
    flex: 0 0 300px;
    height: 200px;
    border-radius: 12px;
    background-size: cover;
    background-position: center;
}

.slider-controls {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.slider-controls button {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
}

/* Galaxy Section */
.galaxy-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.galaxy-card {
    background: var(--glass-bg);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.galaxy-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-blue);
}

.galaxy-img {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.galaxy-info {
    padding: 25px;
}

/* AI Assistant */
.chat-container {
    max-width: 800px;
    margin: 0 auto;
    height: 600px;
    display: flex;
    flex-direction: column;
}

.chat-header {
    padding: 20px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 15px;
}

.ai-avatar {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 800;
}

.ai-status h3 {
    font-size: 1rem;
}

.status-online {
    font-size: 0.7rem;
    color: #00ff88;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 80%;
    padding: 12px 18px;
    border-radius: 18px;
    font-size: 0.95rem;
}

.ai-message {
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.05);
    border-bottom-left-radius: 2px;
}

.user-message {
    align-self: flex-end;
    background: var(--accent-purple);
    border-bottom-right-radius: 2px;
}

.chat-input-area {
    padding: 20px;
    display: flex;
    gap: 10px;
    border-top: 1px solid var(--glass-border);
}

#chat-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 12px 20px;
    color: white;
    outline: none;
}

#send-chat {
    background: var(--accent-blue);
    color: var(--bg-dark);
    border: none;
    padding: 0 25px;
    border-radius: 30px;
    font-weight: 700;
    cursor: pointer;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    width: 90%;
    max-width: 500px;
    padding: 40px;
}

.input-group {
    margin-top: 25px;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    padding: 12px;
    border-radius: 8px;
    color: white;
}

.modal-btns {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

/* Footer */
footer {
    text-align: center;
    padding: 50px;
    color: var(--text-dim);
    font-size: 0.8rem;
    border-top: 1px solid var(--glass-border);
}

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

.reveal {
    animation: fadeInUp 1s ease forwards;
}

.nasa-card, .galaxy-card, .chat-container {
    opacity: 0;
}

.revealed {
    opacity: 1;
    animation: fadeInUp 0.8s ease forwards;
}