:root {
    --primary-cyan: #00f3ff;
    --secondary-cyan: #00d4ff;
    --accent-orange: #ff6b35;
    --bg-dark: #0a0e27;
    --bg-darker: #050812;
    --text-light: #e8f1f5;
    --grid-color: rgba(0, 243, 255, 0.15);
    --glow-cyan: rgba(0, 243, 255, 0.6);
}

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

body {
    font-family: 'Rajdhani', sans-serif;
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 50%, #0d1428 100%);
    color: var(--text-light);
    overflow: hidden;
    height: 100vh;
    position: relative;
}

/* Aviation Background */
.aviation-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* Radar Sweep Effect */
.radar-sweep {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 800px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid var(--grid-color);
    animation: pulse-ring 4s ease-in-out infinite;
}

.radar-sweep::before,
.radar-sweep::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid var(--grid-color);
}

.radar-sweep::before {
    width: 120%;
    height: 120%;
    animation: pulse-ring 4s ease-in-out infinite 1s;
}

.radar-sweep::after {
    width: 80%;
    height: 80%;
    animation: pulse-ring 4s ease-in-out infinite 2s;
}

@keyframes pulse-ring {
    0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.05); }
}

/* Grid Lines */
.grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-scroll 20s linear infinite;
    opacity: 0.3;
}

@keyframes grid-scroll {
    0% { transform: translateY(0); }
    100% { transform: translateY(50px); }
}

/* Horizon Line */
.horizon-line {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--primary-cyan) 20%,
        var(--primary-cyan) 80%,
        transparent 100%);
    box-shadow: 0 0 20px var(--glow-cyan);
    animation: horizon-glow 3s ease-in-out infinite;
}

@keyframes horizon-glow {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* Altitude Markers */
.altitude-markers {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.marker {
    width: 60px;
    height: 2px;
    background: var(--primary-cyan);
    position: relative;
    animation: marker-blink 2s ease-in-out infinite;
    animation-delay: var(--delay);
}

.marker::after {
    content: '';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--accent-orange);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-orange);
}

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

/* Clouds */
.clouds {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.cloud {
    position: absolute;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
    filter: blur(40px);
    animation: float-cloud 30s linear infinite;
}

.cloud-1 {
    width: 300px;
    height: 100px;
    top: 20%;
    left: -300px;
    animation-duration: 45s;
}

.cloud-2 {
    width: 200px;
    height: 80px;
    top: 60%;
    left: -200px;
    animation-duration: 35s;
    animation-delay: 10s;
}

.cloud-3 {
    width: 250px;
    height: 90px;
    top: 40%;
    left: -250px;
    animation-duration: 50s;
    animation-delay: 20s;
}

@keyframes float-cloud {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(100vw + 300px)); }
}

/* Flight Path */
.flight-path {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.flight-path svg {
    width: 100%;
    height: 100%;
}

.trail {
    fill: none;
    stroke: var(--primary-cyan);
    stroke-width: 2;
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    opacity: 0.3;
    animation: draw-path 8s ease-in-out infinite;
    filter: drop-shadow(0 0 5px var(--glow-cyan));
}

@keyframes draw-path {
    0% { stroke-dashoffset: 1000; }
    50% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -1000; }
}

.aircraft {
    position: absolute;
    font-size: 24px;
    color: var(--accent-orange);
    filter: drop-shadow(0 0 10px var(--accent-orange));
    animation: fly-aircraft 8s ease-in-out infinite;
    transform-origin: center;
}

@keyframes fly-aircraft {
    0% {
        left: 0%;
        top: 50%;
        transform: rotate(-10deg);
    }
    25% {
        left: 25%;
        top: 25%;
        transform: rotate(5deg);
    }
    50% {
        left: 50%;
        top: 50%;
        transform: rotate(-5deg);
    }
    75% {
        left: 75%;
        top: 25%;
        transform: rotate(5deg);
    }
    100% {
        left: 100%;
        top: 50%;
        transform: rotate(-10deg);
    }
}

/* Main Container */
.container {
    position: relative;
    z-index: 10;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* HUD Frame */
.hud-frame {
    position: relative;
    padding: 60px 80px;
    border: 2px solid var(--primary-cyan);
    background: rgba(10, 14, 39, 0.85);
    backdrop-filter: blur(10px);
    box-shadow:
        0 0 40px var(--glow-cyan),
        inset 0 0 40px rgba(0, 243, 255, 0.1);
    animation: hud-flicker 4s ease-in-out infinite;
}

@keyframes hud-flicker {
    0%, 100% {
        box-shadow:
            0 0 40px var(--glow-cyan),
            inset 0 0 40px rgba(0, 243, 255, 0.1);
    }
    50% {
        box-shadow:
            0 0 60px var(--glow-cyan),
            inset 0 0 60px rgba(0, 243, 255, 0.15);
    }
}

/* Corner Brackets */
.corner {
    position: absolute;
    width: 30px;
    height: 30px;
    border: 3px solid var(--accent-orange);
    box-shadow: 0 0 10px var(--accent-orange);
}

.corner-tl {
    top: -2px;
    left: -2px;
    border-right: none;
    border-bottom: none;
}

.corner-tr {
    top: -2px;
    right: -2px;
    border-left: none;
    border-bottom: none;
}

.corner-bl {
    bottom: -2px;
    left: -2px;
    border-right: none;
    border-top: none;
}

.corner-br {
    bottom: -2px;
    right: -2px;
    border-left: none;
    border-top: none;
}

/* HUD Content */
.hud-content {
    text-align: center;
}

.coordinates {
    font-family: 'Orbitron', monospace;
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 20px;
    color: var(--secondary-cyan);
    text-transform: uppercase;
}

.coord-label {
    opacity: 0.6;
    margin-right: 5px;
}

.coord-value {
    color: var(--primary-cyan);
    margin-right: 20px;
    animation: coordinate-update 3s ease-in-out infinite;
}

@keyframes coordinate-update {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.name {
    margin: 30px 0;
}

.callsign {
    display: block;
    font-family: 'Orbitron', monospace;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--accent-orange);
    margin-bottom: 10px;
    text-shadow: 0 0 10px var(--accent-orange);
    animation: callsign-blink 2s ease-in-out infinite;
}

@keyframes callsign-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.main-name {
    font-family: 'Orbitron', monospace;
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 900;
    letter-spacing: 8px;
    color: var(--primary-cyan);
    text-shadow:
        0 0 20px var(--glow-cyan),
        0 0 40px var(--glow-cyan),
        0 0 60px var(--glow-cyan);
    animation: name-glow 3s ease-in-out infinite;
    display: block;
}

@keyframes name-glow {
    0%, 100% {
        text-shadow:
            0 0 20px var(--glow-cyan),
            0 0 40px var(--glow-cyan),
            0 0 60px var(--glow-cyan);
    }
    50% {
        text-shadow:
            0 0 30px var(--glow-cyan),
            0 0 60px var(--glow-cyan),
            0 0 90px var(--glow-cyan);
    }
}

/* Status Bar */
.status-bar {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--grid-color);
}

.status-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.status-item .label {
    font-family: 'Orbitron', monospace;
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--text-light);
    opacity: 0.5;
}

.status-item .value {
    font-family: 'Orbitron', monospace;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--primary-cyan);
    animation: value-flicker 2s ease-in-out infinite;
}

@keyframes value-flicker {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.status-active {
    color: var(--accent-orange);
    animation: status-pulse 1.5s ease-in-out infinite;
}

@keyframes status-pulse {
    0%, 100% {
        opacity: 1;
        text-shadow: 0 0 10px var(--accent-orange);
    }
    50% {
        opacity: 0.7;
        text-shadow: 0 0 20px var(--accent-orange);
    }
}

/* Scan Line */
.scan-line {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--primary-cyan) 50%,
        transparent 100%);
    box-shadow: 0 0 20px var(--glow-cyan);
    animation: scan 4s linear infinite;
    z-index: 100;
    pointer-events: none;
}

@keyframes scan {
    0% { transform: translateY(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(100vh); opacity: 0; }
}

/* Particles Canvas */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    pointer-events: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hud-frame {
        padding: 40px 30px;
    }

    .status-bar {
        flex-direction: column;
        gap: 20px;
        align-items: center;
    }

    .coordinates {
        font-size: 10px;
    }

    .callsign {
        font-size: 12px;
        letter-spacing: 2px;
    }

    .main-name {
        letter-spacing: 4px;
    }

    .altitude-markers {
        right: 2%;
        gap: 20px;
    }

    .marker {
        width: 40px;
    }
}

/* Performance Optimization */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}