/* NASA Space Explorer - Main Styles */

:root {
    --primary-color: #1e3c72;
    --secondary-color: #2a5298;
    --accent-color: #ffd700;
    --text-light: #ffffff;
    --text-dark: #333333;
    --background-dark: #0a0a0a;
    --background-card: rgba(255, 255, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.2);
    --gradient-space: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    --gradient-cosmic: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    --shadow-glow: 0 0 20px rgba(255, 215, 0, 0.3);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Exo 2', sans-serif;
    background: var(--background-dark);
    color: var(--text-light);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(45deg, var(--accent-color), #fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    text-align: center;
    opacity: 0.9;
    margin-bottom: 2rem;
}

/* Header & Navigation */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: var(--transition-smooth);
}

.main-header.scrolled {
    background: rgba(0, 0, 0, 0.98);
    backdrop-filter: blur(25px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

/* Enhanced Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    font-size: 2rem;
    animation: rocket-pulse 3s ease-in-out infinite;
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.5));
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-title {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 900;
    background: linear-gradient(45deg, var(--accent-color), #fff, var(--accent-color));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease-in-out infinite;
}

.logo-subtitle {
    font-size: 0.7rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Enhanced Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.8rem 1.2rem;
    border-radius: 30px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.nav-link:hover::before {
    left: 100%;
}

.nav-icon {
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    filter: drop-shadow(0 0 5px rgba(255, 215, 0, 0.3));
}

.nav-text {
    font-family: 'Exo 2', sans-serif;
    transition: var(--transition-smooth);
}

.nav-indicator {
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), #fff);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: var(--transition-smooth);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.2);
}

.nav-link:hover .nav-icon {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.6));
}

.nav-link:hover .nav-indicator {
    width: 80%;
}

.nav-link.active {
    background: var(--gradient-space);
    box-shadow: 0 4px 15px rgba(30, 60, 114, 0.4);
    color: var(--text-light);
}

.nav-link.active .nav-indicator {
    width: 100%;
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color);
}

.nav-link.active .nav-icon {
    transform: scale(1.1);
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.8));
}

/* Navigation Extras */
.nav-extras {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Enhanced Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition-smooth);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.hamburger:hover {
    background: rgba(255, 215, 0, 0.2);
    transform: scale(1.1);
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    margin: 3px 0;
    transition: var(--transition-smooth);
    border-radius: 2px;
    transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
    background: var(--accent-color);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
    background: var(--accent-color);
}

/* Progress Bar */
.nav-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.nav-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-color), #fff, var(--accent-color));
    background-size: 200% 100%;
    animation: progress-shimmer 2s ease-in-out infinite;
    transition: width 0.3s ease;
}

/* Animations */
@keyframes rocket-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1) rotate(5deg); }
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes progress-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* Main Content */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

.section {
    display: none;
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section.active {
    display: block;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Home Section */
.hero-container {
    text-align: center;
    padding: 4rem 0;
    margin-bottom: 4rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
    background: rgba(255, 255, 255, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: 'Exo 2', sans-serif;
}

.btn-primary {
    background: var(--gradient-space);
    color: var(--text-light);
    box-shadow: 0 4px 15px rgba(30, 60, 114, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 60, 114, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: var(--text-dark);
    transform: translateY(-2px);
}

/* Global Input and Select Styling */
input[type="text"],
input[type="search"],
input[type="email"],
input[type="password"],
select,
textarea {
    background: var(--background-card) !important;
    backdrop-filter: blur(10px);
    border: 2px solid var(--border-color) !important;
    border-radius: 10px;
    color: var(--text-light) !important;
    font-family: 'Exo 2', sans-serif;
    font-size: 1rem;
    padding: 0.8rem 1.2rem;
    transition: var(--transition-smooth);
    outline: none;
}

input[type="text"]:focus,
input[type="search"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    border-color: var(--accent-color) !important;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
    background: rgba(255, 255, 255, 0.15) !important;
}

input::placeholder,
textarea::placeholder {
    color: rgba(255, 255, 255, 0.6) !important;
    font-style: italic;
}

/* Enhanced Select Styling */
select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffd700' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 3rem !important;
    cursor: pointer;
}

select option {
    background: var(--background-dark) !important;
    color: var(--text-light) !important;
    padding: 0.8rem;
    border: none;
    font-size: 1rem;
    font-family: 'Exo 2', sans-serif;
}

select option:hover,
select option:focus {
    background: var(--gradient-space) !important;
    color: var(--text-light) !important;
}

select option:checked {
    background: var(--accent-color) !important;
    color: var(--text-dark) !important;
    font-weight: bold;
}

/* Firefox-specific dropdown styling */
@-moz-document url-prefix() {
    select {
        background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffd700' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e") !important;
    }
    
    select option {
        background-color: #0a0a0a !important;
        color: #ffffff !important;
    }
}

/* WebKit-specific dropdown styling */
@media screen and (-webkit-min-device-pixel-ratio:0) {
    select::-webkit-scrollbar {
        width: 8px;
    }
    
    select::-webkit-scrollbar-track {
        background: var(--background-dark);
    }
    
    select::-webkit-scrollbar-thumb {
        background: var(--accent-color);
        border-radius: 4px;
    }
}

/* Form focus states for better accessibility */
input:focus,
select:focus,
textarea:focus,
button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Disabled state styling */
input:disabled,
select:disabled,
textarea:disabled,
button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
}

/* APOD Section */
.apod-container {
    max-width: 1000px;
    margin: 0 auto;
}

.apod-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.apod-image-container {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

#apod-image {
    width: 100%;
    height: auto;
    display: block;
}

.apod-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 2rem;
    background: var(--background-card);
    border-radius: 10px;
    text-align: center;
}

.apod-info {
    padding: 1rem 0;
}

.apod-date {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.apod-controls {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
}

/* Mars Section */
.mars-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.mars-controls select {
    padding: 0.8rem 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--background-card);
    backdrop-filter: blur(10px);
    color: var(--text-light);
    font-size: 1rem;
    font-family: 'Exo 2', sans-serif;
    font-weight: 500;
    min-width: 180px;
    cursor: pointer;
    transition: var(--transition-smooth);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffd700' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

.mars-controls select:hover {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.2);
}

.mars-controls select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

/* Style dropdown options */
.mars-controls select option {
    background: var(--background-dark);
    color: var(--text-light);
    padding: 0.8rem;
    border: none;
    font-size: 1rem;
    font-family: 'Exo 2', sans-serif;
}

.mars-controls select option:hover {
    background: var(--gradient-space);
}

.mars-controls select option:checked {
    background: var(--accent-color);
    color: var(--text-dark);
    font-weight: bold;
}

.mars-photos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.mars-photo {
    border-radius: 10px;
    overflow: hidden;
    background: var(--background-card);
    transition: var(--transition-smooth);
}

.mars-photo:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.mars-photo img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.mars-photo-info {
    padding: 1rem;
}

.mars-photo-info h4 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

/* Exoplanet Section */
.exoplanet-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

#planet-search {
    padding: 0.8rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    background: var(--background-card);
    backdrop-filter: blur(10px);
    color: var(--text-light);
    font-size: 1rem;
    font-family: 'Exo 2', sans-serif;
    font-weight: 500;
    min-width: 300px;
    transition: var(--transition-smooth);
    outline: none;
}

#planet-search::placeholder {
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
}

#planet-search:hover {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.2);
}

#planet-search:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
    background: rgba(255, 255, 255, 0.2);
}

.exoplanet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.exoplanet-card {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
    transition: var(--transition-smooth);
}

.exoplanet-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.exoplanet-name {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.exoplanet-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.stat-item {
    text-align: center;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.stat-value {
    font-weight: bold;
    color: var(--accent-color);
    display: block;
}

/* Quiz Section */
.quiz-container {
    max-width: 800px;
    margin: 0 auto;
}

.quiz-welcome {
    text-align: center;
    padding: 2rem;
    background: var(--background-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.difficulty-selector {
    margin: 2rem 0;
}

.difficulty-selector h4 {
    margin-bottom: 1rem;
}

.difficulty-btn {
    margin: 0.5rem;
    padding: 0.8rem 1.5rem;
    border: 2px solid var(--accent-color);
    background: var(--background-card);
    backdrop-filter: blur(10px);
    color: var(--text-light);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: 'Exo 2', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    min-width: 120px;
}

.difficulty-btn:hover {
    background: rgba(255, 215, 0, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.difficulty-btn.selected {
    background: var(--gradient-space);
    color: var(--text-light);
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.quiz-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--background-card);
    border-radius: 10px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin: 0 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-space);
    transition: width 0.5s ease;
}

.question-container {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.answer-options {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

.answer-option {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition-smooth);
    text-align: left;
}

.answer-option:hover {
    border-color: var(--accent-color);
    background: rgba(255, 215, 0, 0.1);
}

.answer-option.selected {
    border-color: var(--accent-color);
    background: var(--gradient-space);
}

.answer-option.correct {
    border-color: #4ade80;
    background: rgba(74, 222, 128, 0.2);
}

.answer-option.incorrect {
    border-color: #f87171;
    background: rgba(248, 113, 113, 0.2);
}

.quiz-controls {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.quiz-results {
    text-align: center;
    padding: 2rem;
    background: var(--background-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.final-score {
    font-size: 2rem;
    color: var(--accent-color);
    margin: 1rem 0;
}

.quiz-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Adopt-a-Planet Section */
.adopt-container {
    max-width: 800px;
    margin: 0 auto;
}

.adopt-welcome {
    text-align: center;
    padding: 2rem;
    background: var(--background-card);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.planet-passport {
    background: var(--background-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
}

.passport-header {
    margin-bottom: 2rem;
}

.planet-visual {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.planet-orbit {
    width: 200px;
    height: 200px;
    border: 2px dashed var(--accent-color);
    border-radius: 50%;
    position: relative;
    animation: orbit 20s linear infinite;
}

.planet {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: planet-rotate 10s linear infinite;
}

.passport-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.detail-item {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    text-align: center;
}

.detail-label {
    color: var(--accent-color);
    font-weight: bold;
    display: block;
    margin-bottom: 0.5rem;
}

.passport-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Loading States */
.loading {
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    opacity: 0.7;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 215, 0, 0.3);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes orbit {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes planet-rotate {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}