/* Modern Astrocartography App - 2025 Design */

/* Protection against browser extension interference */
html {
    isolation: isolate;
    contain: layout style paint;
}

/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color System - Cosmic Theme */
    --primary-bg: #0a0e1a;
    --secondary-bg: #1a1e2e;
    --accent-bg: #2a2e3e;
    --glass-bg: rgba(26, 30, 46, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --primary-text: #e8eaed;
    --secondary-text: #9aa0a6;
    --accent-text: #bb86fc;
    --highlight-text: #64ffda;
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-cosmic: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Planet Colors */
    --sun-color: #ffd700;
    --moon-color: #c0c0c0;
    --mercury-color: #87ceeb;
    --venus-color: #ffc649;
    --mars-color: #ff4500;
    --jupiter-color: #ffa500;
    --saturn-color: #fab1a0;
    --uranus-color: #74b9ff;
    --neptune-color: #6c5ce7;
    --pluto-color: #a29bfe;
    
    /* Spacing and Layout */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    --border-radius: 12px;
    --border-radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Space Grotesk', var(--font-primary);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(116, 75, 162, 0.3);
}

/* Typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

body {
    font-family: var(--font-primary);
    background: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Cosmic Background Animation */
.cosmic-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.stars {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(2px 2px at 20px 30px, #eee, transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 90px 40px, #fff, transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255,255,255,0.6), transparent),
        radial-gradient(2px 2px at 160px 30px, #ddd, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: twinkle 8s infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.planets {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.planet {
    position: absolute;
    border-radius: 50%;
    opacity: 0.7;
}

.planet.mercury {
    width: 8px;
    height: 8px;
    background: var(--mercury-color);
    top: 20%;
    left: 10%;
    animation: orbit 20s linear infinite;
}

.planet.venus {
    width: 12px;
    height: 12px;
    background: var(--venus-color);
    top: 60%;
    right: 15%;
    animation: orbit 25s linear infinite reverse;
}

.planet.mars {
    width: 10px;
    height: 10px;
    background: var(--mars-color);
    bottom: 30%;
    left: 20%;
    animation: orbit 30s linear infinite;
}

.planet.jupiter {
    width: 16px;
    height: 16px;
    background: var(--jupiter-color);
    top: 40%;
    right: 30%;
    animation: orbit 40s linear infinite reverse;
}

.planet.saturn {
    width: 14px;
    height: 14px;
    background: var(--saturn-color);
    bottom: 20%;
    right: 10%;
    animation: orbit 35s linear infinite;
    position: relative;
}

.planet.saturn .ring {
    position: absolute;
    top: -4px;
    left: -4px;
    width: 22px;
    height: 22px;
    border: 2px solid rgba(250, 177, 160, 0.5);
    border-radius: 50%;
    animation: ring-rotate 10s linear infinite;
}

@keyframes orbit {
    0% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(90deg); }
    50% { transform: translateY(0px) rotate(180deg); }
    75% { transform: translateY(10px) rotate(270deg); }
    100% { transform: translateY(0px) rotate(360deg); }
}

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

.nebula {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(120, 119, 198, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 119, 198, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 40% 80%, rgba(64, 255, 218, 0.1) 0%, transparent 50%);
    animation: nebula-drift 60s ease-in-out infinite alternate;
}

@keyframes nebula-drift {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.1) rotate(3deg); }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(10, 14, 26, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    text-align: center;
    color: var(--primary-text);
}

.spinner-orbit {
    width: 80px;
    height: 80px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    position: relative;
    animation: spin 2s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.spinner-planet {
    width: 12px;
    height: 12px;
    background: var(--gradient-cosmic);
    border-radius: 50%;
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
}

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

/* App Container */
.app-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* Header */
.app-header {
    padding: var(--spacing-xxl) var(--spacing-lg);
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(26, 30, 46, 0.3) 100%);
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
}

.main-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.title-icon {
    font-size: 1.2em;
    animation: pulse 2s ease-in-out infinite;
}

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

.subtitle {
    font-size: 1.125rem;
    color: var(--secondary-text);
    font-weight: 300;
}

/* Form Section */
.form-section {
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl);
    box-shadow: var(--shadow-lg);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    color: var(--accent-text);
}

.form-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-label {
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-text);
    font-size: 0.875rem;
}

.required {
    color: #ff6b6b;
}

.optional {
    color: var(--secondary-text);
    font-weight: 400;
}

.form-input {
    padding: var(--spacing-md);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.05);
    color: var(--primary-text);
    font-size: 1rem;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-text);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(187, 134, 252, 0.2);
}

.form-input::placeholder {
    color: var(--secondary-text);
}

.form-input:invalid {
    border-color: #ff6b6b;
}

.error-message {
    color: #ff6b6b;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition);
}

.error-message.show {
    opacity: 1;
    transform: translateY(0);
}

/* Location Input */
.location-input-wrapper {
    position: relative;
}

.location-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--accent-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    box-shadow: var(--shadow-md);
}

.location-dropdown.show {
    display: block;
}

.location-option {
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.location-option:hover,
.location-option:focus {
    background: rgba(255, 255, 255, 0.1);
}

.location-option.selected {
    background: var(--accent-text);
    color: var(--primary-bg);
}

.location-loading {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    display: none;
}

.location-loading.show {
    display: block;
}

.spinner-small {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top: 2px solid var(--accent-text);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Generate Button */
.form-actions {
    text-align: center;
}

.generate-btn {
    background: var(--gradient-primary);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.generate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.generate-btn:hover::before {
    left: 100%;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 1.2em;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(180deg); }
}

/* Chart Section */
.chart-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.chart-section.show {
    opacity: 1;
    transform: translateY(0);
}

.chart-container {
    max-width: 1400px;
    margin: 0 auto;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.chart-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent-text);
}

.chart-controls {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.control-btn {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--primary-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition);
    font-size: 0.875rem;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Map Wrapper */
.map-wrapper {
    position: relative;
    height: 70vh;
    min-height: 500px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--accent-bg);
}

.astro-map {
    width: 100% !important;
    height: 100% !important;
    z-index: 1 !important;
    position: relative !important;
}

#map {
    width: 100% !important;
    height: 100% !important;
    min-height: 500px !important;
    position: relative !important;
}

/* Legend Panel */
.legend-panel {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 280px;
    max-height: calc(100% - 2 * var(--spacing-lg));
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    z-index: 10;
    transform: translateX(100%);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.legend-panel.show {
    transform: translateX(0);
}

.legend-header {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
}

.legend-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-text);
}

.legend-close {
    background: none;
    border: none;
    color: var(--secondary-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.legend-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary-text);
}

.legend-content {
    padding: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.legend-section {
    margin-bottom: var(--spacing-lg);
}

.legend-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-text);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: var(--spacing-xs);
}

.legend-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.legend-item.disabled {
    opacity: 0.5;
}

.legend-color,
.legend-line {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-line {
    border-radius: 0;
    height: 3px;
    margin-top: 8px;
}

.legend-text {
    font-size: 0.875rem;
    color: var(--primary-text);
}

/* Chart Info */
.chart-info {
    margin-top: var(--spacing-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.info-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-text);
    margin-bottom: var(--spacing-md);
}

.info-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.info-content ul {
    list-style: none;
    padding-left: 0;
}

.info-content li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-lg);
    position: relative;
}

.info-content li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--accent-text);
}

.info-content strong {
    color: var(--highlight-text);
}

/* About Section */
.about-section {
    padding: var(--spacing-xxl) var(--spacing-lg);
    background: linear-gradient(180deg, transparent 0%, rgba(26, 30, 46, 0.3) 100%);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.about-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

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

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.about-card h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--accent-text);
}

.about-card p {
    color: var(--secondary-text);
    line-height: 1.6;
}

/* Footer */
.app-footer {
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-links {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--secondary-text);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.875rem;
}

.footer-link:hover {
    color: var(--accent-text);
}

/* Responsive Design */
@media (max-width: 768px) {
    .form-container {
        margin: 0 var(--spacing-md);
        padding: var(--spacing-lg);
    }
    
    .chart-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .chart-controls {
        justify-content: center;
    }
    
    .legend-panel {
        position: static;
        width: 100%;
        margin-top: var(--spacing-lg);
        transform: none;
    }
    
    .map-wrapper {
        height: 60vh;
        min-height: 400px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .main-title {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .form-grid {
        gap: var(--spacing-md);
    }
    
    .generate-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Utility Classes */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

/* Custom Leaflet Map Styles */
.leaflet-container {
    background: #1a1e2e !important;
    font-family: var(--font-primary) !important;
}

.leaflet-popup-content-wrapper {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(20px) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: var(--border-radius) !important;
    color: var(--primary-text) !important;
}

.leaflet-popup-tip {
    background: var(--glass-bg) !important;
    border: 1px solid var(--glass-border) !important;
}

.leaflet-control-attribution {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(10px) !important;
    color: var(--secondary-text) !important;
}

.leaflet-control-zoom a {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(20px) !important;
    border: 1px solid var(--glass-border) !important;
    color: var(--primary-text) !important;
}

.leaflet-control-zoom a:hover {
    background: rgba(255, 255, 255, 0.1) !important;
}