/* Reset and Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-card: #0f0f0f;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #4a9eff;
    --success: #4ade80;
    --warning: #fbbf24;
    --danger: #ef4444;
    --border: #2a2a2a;
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(74, 158, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(74, 222, 128, 0.05) 0%, transparent 50%);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent), var(--success));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: brightness(1); }
    to { filter: brightness(1.2); }
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Status Indicator */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 0.9rem;
}

.pulse {
    width: 10px;
    height: 10px;
    background: var(--warning);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
    100% { transform: scale(0.95); opacity: 1; }
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

/* Cards - Enhanced with 3D effects */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    transition: all 0.3s ease;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--success));
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.card:hover::before {
    transform: translateX(0);
}

.card:hover {
    transform: translateY(-4px) rotateX(-2deg) rotateY(2deg);
    border-color: var(--accent);
    box-shadow: 
        0 10px 30px rgba(74, 158, 255, 0.3),
        0 20px 60px rgba(74, 158, 255, 0.1);
}

.card h2 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Stats Grid */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 16px;
}

.stat {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 158, 255, 0.2);
}

.stat label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.stat span {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent);
}

/* Country stat - full width */
.country-stat {
    grid-column: 1 / -1;
}

.country-stat span {
    font-size: 1.2rem;
}

/* Update Time */
.update-time {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 12px;
}

/* Astronauts Card */
.astronaut-count {
    text-align: center;
    margin-bottom: 20px;
}

.astronaut-count span {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--success);
    animation: float-stat 3s ease-in-out infinite;
}

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

.astronaut-count label {
    color: var(--text-secondary);
}

.astronaut-list {
    max-height: 300px;
    overflow-y: auto;
}

.astronaut-item {
   display: flex;
   align-items: center;
   gap: 12px;
   padding: 12px;
   background: var(--bg-secondary);
   border-radius: 8px;
   margin-bottom: 8px;
   transition: all 0.3s ease;
}

.astronaut-item:hover {
   transform: translateX(5px);
   background: var(--bg-primary);
}

.astronaut-icon {
   font-size: 1.5rem;
}

/* Map */
#map {
   height: 400px;
   border-radius: 8px;
   margin-bottom: 16px;
   box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
}

.custom-div-icon {
   background: transparent;
   border: none;
}

.iss-marker {
   font-size: 30px;
   filter: drop-shadow(0 0 10px rgba(74, 158, 255, 0.8));
   animation: float 3s ease-in-out infinite;
}

@keyframes float {
   0%, 100% { transform: translateY(0); }
   50% { transform: translateY(-10px); }
}

/* Map Controls */
.map-controls {
   display: flex;
   gap: 10px;
   justify-content: center;
   flex-wrap: wrap;
}

/* Buttons - Enhanced */
.btn {
   padding: 10px 20px;
   background: var(--bg-secondary);
   border: 1px solid var(--border);
   color: var(--text-primary);
   border-radius: 8px;
   cursor: pointer;
   font-size: 0.9rem;
   transition: all 0.3s ease;
   display: inline-flex;
   align-items: center;
   gap: 8px;
}

.btn:hover {
   background: var(--bg-primary);
   border-color: var(--accent);
   transform: translateY(-2px);
   box-shadow: 
       0 0 20px rgba(74, 158, 255, 0.4),
       0 0 40px rgba(74, 158, 255, 0.2);
}

.btn-primary {
   background: var(--accent);
   border-color: var(--accent);
}

.btn-primary:hover {
   background: #3a8eef;
   box-shadow: 
       0 0 20px rgba(74, 158, 255, 0.6),
       0 0 40px rgba(74, 158, 255, 0.3);
}

.btn-secondary {
   background: var(--success);
   border-color: var(--success);
}

.btn-secondary:hover {
   background: #3ace70;
   box-shadow: 
       0 0 20px rgba(74, 222, 128, 0.6),
       0 0 40px rgba(74, 222, 128, 0.3);
}

.btn-icon {
   font-size: 1.1rem;
}

/* NASA Image */
.nasa-image-container {
   position: relative;
   border-radius: 8px;
   overflow: hidden;
   height: 300px;
}

#nasaImage {
   width: 100%;
   height: 100%;
   object-fit: cover;
}

.nasa-overlay {
   position: absolute;
   bottom: 0;
   left: 0;
   right: 0;
   background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
   padding: 20px;
   color: white;
}

.nasa-overlay h3 {
   font-size: 1.2rem;
   margin-bottom: 4px;
}

.nasa-overlay p {
   font-size: 0.9rem;
   opacity: 0.8;
}

/* Space Weather */
.weather-content {
   display: flex;
   flex-direction: column;
   gap: 16px;
}

.weather-stat {
   display: flex;
   justify-content: space-between;
   align-items: center;
   padding: 12px;
   background: var(--bg-secondary);
   border-radius: 8px;
   transition: all 0.3s ease;
}

.weather-stat:hover {
   transform: translateX(5px);
   background: var(--bg-primary);
}

.weather-stat label {
   color: var(--text-secondary);
}

.weather-stat span {
   font-weight: 600;
   color: var(--accent);
}

.weather-alert {
   display: none;
   align-items: center;
   gap: 10px;
   padding: 12px;
   background: rgba(239, 68, 68, 0.1);
   border: 1px solid var(--danger);
   border-radius: 8px;
   color: var(--danger);
   animation: alert-pulse 2s ease-in-out infinite;
}

@keyframes alert-pulse {
   0%, 100% { opacity: 0.8; }
   50% { opacity: 1; }
}

.alert-icon {
   font-size: 1.2rem;
}

/* Pass Times */
.pass-info {
   display: flex;
   flex-direction: column;
   gap: 16px;
}

.location-input {
   width: 100%;
   padding: 12px;
   background: var(--bg-secondary);
   border: 1px solid var(--border);
   border-radius: 8px;
   color: var(--text-primary);
   font-size: 1rem;
   transition: all 0.3s ease;
}

.location-input:focus {
   outline: none;
   border-color: var(--accent);
   box-shadow: 0 0 10px rgba(74, 158, 255, 0.3);
}

.pass-times {
   margin-top: 16px;
}

.pass-item {
   padding: 12px;
   padding-left: 16px;
   background: var(--bg-secondary);
   border-radius: 8px;
   margin-bottom: 8px;
   transition: all 0.3s ease;
}

.pass-item:hover {
   background: var(--bg-primary);
   transform: translateX(4px);
}

.pass-item strong {
   display: block;
   color: var(--accent);
   margin-bottom: 4px;
}

.pass-item small {
   display: block;
   color: var(--text-secondary);
   margin-top: 4px;
}

/* Footer */
footer {
   text-align: center;
   padding: 20px 0;
   border-top: 1px solid var(--border);
   color: var(--text-secondary);
}

footer p {
   margin-bottom: 8px;
}

/* Scrollbar */
::-webkit-scrollbar {
   width: 8px;
}

::-webkit-scrollbar-track {
   background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
   background: var(--border);
   border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
   background: var(--accent);
}

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

/* Responsive */
@media (max-width: 768px) {
   header h1 {
       font-size: 2rem;
   }
   
   .grid {
       grid-template-columns: 1fr;
   }
   
   .map-controls {
       flex-direction: column;
   }
   
   .btn {
       width: 100%;
       justify-content: center;
   }
   
   #map {
       height: 300px;
   }
}