* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: #121212;
    color: #ffffff;
}

.container {
    display: flex;
    height: 100vh;
}

/* -------------------------- */
/* SIDEBAR STYLING            */
/* -------------------------- */
.sidebar {
    width: 280px;
    background-color: #1a1a1a;
    padding: 25px 20px;
    border-right: 3px solid #73ccd2;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar h1 {
    color: #73ccd2;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

#system-status {
    color: #cccccc;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
    line-height: 1.4;
}

/* Route display box — bold & highlighted */
.route-header {
    background-color: #222222;
    border-left: 4px solid #73ccd2;
    padding: 12px 15px;
    margin-bottom: 15px;
}

#route-display {
    color: #ffffff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.8px;
    margin: 0;
    text-transform: uppercase;
}

/* Flight results section — modern & bold */
#flight-list {
    flex: 1;
    overflow-y: auto;
    background-color: #1e1e1e;
    border-radius: 2px;
    padding: 10px 0;
}

/* Flight count text */
#flight-list .flight-count {
    color: #73ccd2;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    margin: 0 15px 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid #333333;
    letter-spacing: 0.5px;
}

/* Individual flight items — exactly like your screenshot */
#flight-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

#flight-list li {
    background-color: #2a2a2a;
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 12px 15px;
    margin: 6px 12px;
    border-left: 3px solid #73ccd2;
    border-radius: 2px;
    transition: all 0.2s ease;
    text-transform: uppercase;
}

#flight-list li:hover {
    background-color: #333333;
    border-left-width: 4px;
    padding-left: 18px;
}

#flight-list .message {
    color: #aaaaaa;
    font-style: italic;
    padding: 20px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
}

#flight-list .message.error {
    color: #ff6666;
}

/* Clear/Reset Button */
button {
    width: 100%;
    padding: 12px;
    background-color: #73ccd2;
    color: #000000;
    border: none;
    font-weight: bold;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    border-radius: 2px;
    transition: background-color 0.2s ease;
    margin-top: 10px;
}

button:hover {
    background-color: #87d9df; /* Lighter teal on hover */
}

/* -------------------------- */
/* MAP AREA                   */
/* -------------------------- */
#map {
    flex: 1;
    height: 100%;
}

/* Leaflet map customization */
.leaflet-tile-pane {
    filter: brightness(1.3) contrast(1.1);
}