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

body {
    background: #0a0a0f;
    overflow: hidden;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: #e0e0e0;
}

/* INTRO */
#intro {
    position: fixed;
    inset: 0;
    background: #0a0a0f;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    z-index: 9999;
    transition: opacity 1.5s ease-out;
    letter-spacing: 2px;
    color: #00ffd5;
}

#intro .spinner {
    width: 24px;
    height: 24px;
    border: 2px solid #333;
    border-top-color: #00ffd5;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* MAP */
svg {
    width: 100vw;
    height: 100vh;
    display: block;
}

.country {
    fill: #151520;
    stroke: #2a2a3a;
    stroke-width: 0.4;
}

.route {
    fill: none;
    stroke: #00ffd5;
    stroke-width: 1.4;
    opacity: 0;
}

.route-business {
    stroke: #ffd700;
}

.route-count {
    fill: #fff;
    font-size: 9px;
    font-family: monospace;
    font-weight: 700;
    text-anchor: middle;
    pointer-events: none;
    stroke: #0a0a0f;
    stroke-width: 3px;
    paint-order: stroke fill;
}

.airport-dot {
    fill: #ff3b5c;
    opacity: 0;
    transition: opacity 0.5s;
}

.airport-label {
    fill: #888;
    font-size: 9px;
    font-family: monospace;
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
}

/* HEADER */
#header {
    position: absolute;
    top: 24px;
    left: 32px;
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #555;
}

#header h1 {
    font-size: 11px;
    font-weight: 400;
}

/* YEAR DISPLAY */
#year-display {
    position: absolute;
    bottom: 80px;
    left: 32px;
    font-size: 64px;
    font-weight: 200;
    color: #00ffd5;
    opacity: 0.8;
    letter-spacing: -2px;
}

/* FLIGHT INFO */
#flight-info {
    position: absolute;
    bottom: 32px;
    left: 32px;
    font-size: 13px;
    color: #888;
    line-height: 1.4;
}

#flight-info .route-label {
    font-size: 16px;
    color: #e0e0e0;
    margin-bottom: 4px;
}

/* STATS */
#stats {
    position: absolute;
    top: 24px;
    right: 32px;
    font-size: 12px;
    line-height: 2;
    text-align: right;
    opacity: 0;
    transition: opacity 0.5s;
}

#stats .stat-value {
    color: #00ffd5;
    font-size: 18px;
    font-weight: 600;
}

#stats .stat-label {
    color: #555;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* CONTROLS */
#controls {
    position: absolute;
    bottom: 32px;
    right: 32px;
    display: flex;
    gap: 6px;
    align-items: center;
}

#controls button, #controls select {
    background: rgba(20, 20, 30, 0.8);
    color: #aaa;
    border: 1px solid #2a2a3a;
    padding: 8px 14px;
    cursor: pointer;
    font-family: inherit;
    font-size: 12px;
    transition: all 0.2s;
    border-radius: 4px;
}

#controls button:hover, #controls select:hover {
    border-color: #00ffd5;
    color: #00ffd5;
}

#controls button.active {
    border-color: #00ffd5;
    color: #00ffd5;
}

#controls select {
    appearance: none;
    padding-right: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23555'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
}

/* MOBILE */
@media (max-width: 600px) {
    #header {
        top: 12px;
        left: 12px;
    }

    #year-display {
        font-size: 36px;
        bottom: auto;
        top: 12px;
        left: auto;
        right: 12px;
    }

    #stats {
        top: auto;
        bottom: 100px;
        right: 12px;
        font-size: 11px;
        line-height: 1.6;
    }

    #stats .stat-value {
        font-size: 15px;
    }

    #stats .stat-label {
        font-size: 9px;
        letter-spacing: 1px;
    }

    #flight-info {
        bottom: 56px;
        left: 12px;
        right: 12px;
        font-size: 11px;
    }

    #flight-info .route-label {
        font-size: 13px;
    }

    #controls {
        bottom: 10px;
        left: 12px;
        right: 12px;
        justify-content: center;
        flex-wrap: wrap;
    }

    #controls button, #controls select {
        padding: 10px 14px;
        font-size: 13px;
        -webkit-tap-highlight-color: transparent;
    }

    #legend {
        top: 44px;
        right: 12px;
        font-size: 9px;
    }

    #tooltip {
        max-width: 180px;
        font-size: 10px;
    }
}

/* PROGRESS BAR */
#progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: #00ffd5;
    opacity: 0.6;
    transition: width 0.3s ease-out;
}

/* AIRLINE LEGEND */
#legend {
    position: absolute;
    top: 60px;
    right: 32px;
    font-size: 10px;
    opacity: 0;
    transition: opacity 0.5s;
}

#legend .legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
    color: #555;
}

#legend .legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* TOOLTIP */
#tooltip {
    position: absolute;
    background: rgba(10, 10, 15, 0.95);
    border: 1px solid #2a2a3a;
    padding: 10px 14px;
    font-size: 11px;
    line-height: 1.6;
    border-radius: 4px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    max-width: 240px;
    z-index: 100;
}