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

:root {
    --primary-color: #4a90e2;
    --secondary-color: #6c5ce7;
    --background: #0a0e27;
    --surface: rgba(26, 31, 58, 0.25);
    --surface-light: rgba(37, 43, 74, 0.3);
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --accent: #ffd700;
    --error: #ff6b6b;
    --success: #51cf66;
    --border: rgba(58, 68, 102, 0.4);
}

/* Animated Starry Background */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
    position: relative;
}

/* Star Layers */
#stars, #stars2, #stars3 {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

#stars {
    width: 1px;
    height: 1px;
    background: transparent;
    box-shadow: 779px 1336px #FFF, 324px 42px #FFF, 303px 586px #FFF, 1312px 276px #FFF, 451px 625px #FFF, 
    115px 1510px #FFF, 1232px 883px #FFF, 1018px 1668px #FFF, 1882px 1043px #FFF, 1441px 1617px #FFF, 
    1498px 1117px #FFF, 1145px 616px #FFF, 1516px 1232px #FFF, 1294px 1645px #FFF, 1925px 1146px #FFF, 
    1555px 1562px #FFF, 1897px 1917px #FFF, 1509px 1592px #FFF, 1842px 1908px #FFF, 1177px 1548px #FFF;
    animation: animStar 50s linear infinite;
}

#stars:after {
    content: " ";
    position: absolute;
    top: 2000px;
    width: 1px;
    height: 1px;
    background: transparent;
    box-shadow: 779px 1336px #FFF, 324px 42px #FFF, 303px 586px #FFF, 1312px 276px #FFF, 451px 625px #FFF, 
    115px 1510px #FFF, 1232px 883px #FFF, 1018px 1668px #FFF, 1882px 1043px #FFF, 1441px 1617px #FFF, 
    1498px 1117px #FFF, 1145px 616px #FFF, 1516px 1232px #FFF, 1294px 1645px #FFF, 1925px 1146px #FFF, 
    1555px 1562px #FFF, 1897px 1917px #FFF, 1509px 1592px #FFF, 1842px 1908px #FFF, 1177px 1548px #FFF;
}

#stars2 {
    width: 2px;
    height: 2px;
    background: transparent;
    box-shadow: 1226px 1879px #FFF, 478px 821px #FFF, 1844px 1691px #FFF, 925px 1139px #FFF, 6px 1829px #FFF, 
    838px 1390px #FFF, 1576px 1819px #FFF, 990px 1095px #FFF, 210px 1523px #FFF, 1509px 296px #FFF;
    animation: animStar 100s linear infinite;
}

#stars2:after {
    content: " ";
    position: absolute;
    top: 2000px;
    width: 2px;
    height: 2px;
    background: transparent;
    box-shadow: 1226px 1879px #FFF, 478px 821px #FFF, 1844px 1691px #FFF, 925px 1139px #FFF, 6px 1829px #FFF, 
    838px 1390px #FFF, 1576px 1819px #FFF, 990px 1095px #FFF, 210px 1523px #FFF, 1509px 296px #FFF;
}

#stars3 {
    width: 3px;
    height: 3px;
    background: transparent;
    box-shadow: 1851px 599px #FFF, 1131px 1750px #FFF, 942px 587px #FFF, 1080px 1474px #FFF, 1495px 1726px #FFF;
    animation: animStar 150s linear infinite;
}

#stars3:after {
    content: " ";
    position: absolute;
    top: 2000px;
    width: 3px;
    height: 3px;
    background: transparent;
    box-shadow: 1851px 599px #FFF, 1131px 1750px #FFF, 942px 587px #FFF, 1080px 1474px #FFF, 1495px 1726px #FFF;
}

@keyframes animStar {
    from {
        transform: translateY(0px);
    }
    to {
        transform: translateY(-2000px);
    }
}

.container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 20px;
    background: var(--surface);
    border-radius: 20px;
    border: 1px solid var(--border);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    transition: all 0.3s ease;
}

header:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        filter: drop-shadow(0 0 5px rgba(74, 144, 226, 0.5));
    }
    to {
        filter: drop-shadow(0 0 20px rgba(108, 92, 231, 0.8));
    }
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Buttons */
button {
    cursor: pointer;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    padding: 15px 30px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 100%;
    max-width: 300px;
    display: block;
    margin: 0 auto;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(74, 144, 226, 0.5);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    background: var(--surface-light);
    color: var(--text-primary);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.secondary-btn:hover {
    background: var(--surface);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.2);
}

/* Sections */
section {
    margin-bottom: 30px;
}

.location-section {
    text-align: center;
    padding: 30px;
    background: var(--surface);
    border-radius: 20px;
    border: 1px solid var(--border);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    transition: all 0.3s ease;
}

.location-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
}

.info-section {
    padding: 25px;
    background: var(--surface);
    border-radius: 20px;
    border: 1px solid var(--border);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    transition: all 0.3s ease;
}

.info-section:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
}

.info-section h2 {
    margin-bottom: 20px;
    color: var(--accent);
    font-size: 1.5rem;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

/* Info Box */
.info-box {
    background: var(--surface-light);
    padding: 20px;
    border-radius: 15px;
    margin-top: 20px;
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px 0 rgba(31, 38, 135, 0.2);
    transition: all 0.3s ease;
}

.info-box:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 25px 0 rgba(31, 38, 135, 0.3);
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.info-box p {
    margin: 8px 0;
    color: var(--text-secondary);
}

.info-box strong {
    color: var(--text-primary);
    display: inline-block;
    min-width: 100px;
}

/* Coordinate Grid */
.coordinate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.coordinate-item {
    background: var(--surface-light);
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.coordinate-item:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.3);
}

.coordinate-item label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.coordinate-item span {
    display: block;
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: bold;
}

/* Loading Indicator */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--surface-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Error Box */
.error-box {
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    text-align: left;
    line-height: 1.8;
}

.error-box strong {
    color: #ff8787;
}

.error-box br {
    display: block;
    margin: 5px 0;
}

/* Results Section */
.results-section h2 {
    text-align: center;
    color: var(--accent);
    margin-bottom: 30px;
    font-size: 2rem;
}

/* Object Cards */
.object-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 25px;
    margin-bottom: 25px;
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    transition: all 0.3s ease;
}

.object-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
}

.object-card.primary {
    border: 2px solid var(--accent);
    background: linear-gradient(135deg, var(--surface) 0%, rgba(255, 215, 0, 0.05) 100%);
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.2);
}

.object-card.primary:hover {
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.4);
}

.object-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.object-card.primary h3 {
    color: var(--accent);
    font-size: 1.6rem;
}

.object-list {
    margin-bottom: 25px;
}

.object-list h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    padding: 15px;
    background: var(--surface);
    border-radius: 15px;
    border: 1px solid var(--border);
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 20px 0 rgba(31, 38, 135, 0.3);
    transition: all 0.3s ease;
}

.object-list h3:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px 0 rgba(31, 38, 135, 0.4);
}

.object-item {
    background: var(--surface-light);
    padding: 15px;
    border-radius: 15px;
    margin-bottom: 12px;
    border-left: 3px solid var(--primary-color);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px 0 rgba(31, 38, 135, 0.2);
    transition: all 0.3s ease;
}

.object-item:hover {
    transform: translateX(8px) translateY(-2px);
    border-left-color: var(--accent);
    box-shadow: 0 4px 20px 0 rgba(74, 144, 226, 0.3);
}

.object-name {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.object-details {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.object-detail-item {
    margin: 5px 0;
}

.object-type {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    margin-right: 10px;
}

.fun-fact {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1), rgba(255, 152, 0, 0.05));
    border-left: 3px solid #ffc107;
    padding: 10px 12px;
    margin: 10px 0;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.fun-fact em {
    font-style: italic;
    color: var(--text-primary);
}

/* Refresh Section */
#refreshSection {
    text-align: center;
    padding: 30px;
}

#refreshBtn {
    margin-bottom: 15px;
}

.timestamp {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 50px;
    padding: 30px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}

footer p {
    margin: 8px 0;
}

.note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

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

/* Info tooltip */
.info-icon {
    display: inline-block;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 18px;
    font-size: 12px;
    font-weight: bold;
    cursor: help;
    margin-left: 8px;
    position: relative;
}

.info-icon:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: 25px;
    transform: translateX(-50%);
    background: var(--surface);
    color: var(--text-primary);
    padding: 12px 15px;
    border-radius: 8px;
    border: 1px solid var(--border);
    white-space: normal;
    width: 300px;
    font-size: 0.85rem;
    font-weight: normal;
    line-height: 1.5;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.info-icon:hover::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 18px;
    transform: translateX(-50%);
    border: 7px solid transparent;
    border-top-color: var(--border);
    z-index: 1000;
}

/* Collapsible sections */
.collapsible-header {
    cursor: pointer;
    padding: 15px 20px;
    background: var(--surface);
    border-radius: 15px;
    border: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    user-select: none;
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 20px 0 rgba(31, 38, 135, 0.3);
}

.collapsible-header:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px 0 rgba(74, 144, 226, 0.4);
}

.collapsible-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.4rem;
    text-shadow: 0 0 10px rgba(74, 144, 226, 0.3);
}

.collapsible-toggle {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.collapsible-toggle.expanded {
    transform: rotate(180deg);
}

.collapsible-content {
    margin-top: 15px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 5000px;
    }
}

.flight-card {
    background: var(--surface-light);
    padding: 15px;
    border-radius: 15px;
    margin-bottom: 12px;
    border-left: 3px solid #4dabf7;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px 0 rgba(31, 38, 135, 0.2);
    transition: all 0.3s ease;
}

.flight-card:hover {
    transform: translateX(8px) translateY(-2px);
    background: var(--surface);
    box-shadow: 0 4px 20px 0 rgba(77, 171, 247, 0.3);
    border-left-color: #74c0fc;
}

.flight-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.flight-name {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-primary);
}

.flight-route {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.flight-arrow {
    color: var(--primary-color);
    font-weight: bold;
}

.flight-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.flight-detail {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.flight-detail strong {
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

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

    .object-card, .info-box {
        padding: 15px;
    }

    body {
        padding: 10px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-section {
    animation: fadeIn 0.5s ease;
}

.object-item {
    animation: fadeIn 0.3s ease;
}

/* Satellite specific styling */
.satellite-item {
    border-left-color: #51cf66;
}

/* Airplane specific styling */
.airplane-item {
    border-left-color: #4dabf7;
}

/* Planet specific styling */
.planet-item {
    border-left-color: #ffd700;
}

/* Star specific styling */
.star-item {
    border-left-color: #4a90e2;
}

/* Map Container */
.map-container {
    width: 100%;
    height: 500px;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
    border: 2px solid var(--border);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* Leaflet popup customization */
.leaflet-popup-content-wrapper {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.leaflet-popup-content {
    margin: 15px;
    font-size: 0.9rem;
    line-height: 1.6;
}

.leaflet-popup-tip {
    background: var(--surface);
}

.leaflet-container a.leaflet-popup-close-button {
    color: var(--text-secondary);
    font-size: 20px;
}

.leaflet-container a.leaflet-popup-close-button:hover {
    color: var(--primary-color);
}

/* Map airplane marker */
.airplane-marker {
    background: transparent;
    border: none;
    font-size: 24px;
    text-align: center;
    line-height: 1;
}

.trajectory-arrow {
    background: transparent;
    border: none;
    color: #ffd43b;
    text-align: center;
    line-height: 1;
    font-weight: bold;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.5));
}

.user-marker {
    background: var(--primary-color);
    border: 3px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    margin-left: -10px;
    margin-top: -10px;
    box-shadow: 0 0 10px rgba(74, 144, 226, 0.6);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 10px rgba(74, 144, 226, 0.6);
    }
    50% {
        box-shadow: 0 0 20px rgba(74, 144, 226, 1);
    }
}