/* Custom variables for UI styling */
:root {
    --bg-primary: #0a0f1d;
    --bg-secondary: #111827;
    --accent-blue: #38bdf8;
    --accent-orange: #f59e0b;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #1f2937;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 1.6rem;
}

.logo-text h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.tagline {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: block;
    margin-top: 1px;
}

.controls {
    display: flex;
    gap: 10px;
}

.nav-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.nav-btn.active {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #000;
    font-weight: 600;
    box-shadow: 0 0 10px var(--accent-glow);
}

#map-container {
    flex-grow: 1;
    position: relative;
    width: 100%;
    height: 100%;
}

#map {
    width: 100%;
    height: 100%;
}

/* UI Overlay styling */
.info-overlay {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background-color: rgba(17, 24, 39, 0.9);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
    z-index: 1000;
    min-width: 250px;
    max-width: 320px;
    backdrop-filter: blur(8px);
    pointer-events: none;
    font-size: 0.85rem;
}

.overlay-header {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 4px;
}

#status-content {
    line-height: 1.5;
}

.refresh-indicator {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 8px;
    text-align: right;
}

.status-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #10b981;
    margin-right: 6px;
}

.status-indicator.blinking {
    background-color: var(--accent-blue);
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

/* Custom map marker styles */
.plane-icon-div {
    display: flex;
    justify-content: center;
    align-items: center;
}

.plane-symbol {
    font-size: 18px;
    color: var(--accent-blue);
    text-shadow: 0 0 4px rgba(0,0,0,0.8);
    transition: transform 0.2s ease;
}

.satellite-symbol {
    font-size: 24px;
    color: var(--accent-orange);
    text-shadow: 0 0 6px rgba(0,0,0,0.8);
}

/* Leaflet dark theme map popup override */
.leaflet-popup-content-wrapper {
    background-color: var(--bg-secondary) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color);
    border-radius: 6px;
}
.leaflet-popup-tip {
    background-color: var(--bg-secondary) !important;
}