/* ===== Global Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow: hidden;
    background: #000;
    font-family: 'Rajdhani', sans-serif;
    color: #fff;
    cursor: default;
    user-select: none;
}

#game-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
}

/* ===== Loading Screen ===== */
#loading-screen {
    position: fixed; inset: 0;
    z-index: 1000;
    background: linear-gradient(135deg, #0a0e1a 0%, #121a2e 50%, #0d1520 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-content {
    text-align: center;
}

.loading-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 0.3em;
    background: linear-gradient(90deg, #4ecafc, #72f5c4, #4ecafc);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3s linear infinite;
    margin-bottom: 3rem;
}

@keyframes shimmer {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.loading-bar-container {
    width: 400px;
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    margin: 0 auto 1.5rem;
    overflow: hidden;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #4ecafc, #72f5c4);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.loading-text {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

/* ===== Start Menu ===== */
#start-menu {
    position: fixed; inset: 0;
    z-index: 900;
    background: linear-gradient(135deg, rgba(10,14,26,0.95), rgba(18,26,46,0.95));
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.menu-content {
    text-align: center;
    max-width: 700px;
    padding: 2rem;
}

.menu-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: 0.3em;
    background: linear-gradient(90deg, #4ecafc, #72f5c4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.menu-subtitle {
    color: rgba(255,255,255,0.4);
    font-size: 1rem;
    letter-spacing: 0.2em;
    margin-bottom: 2.5rem;
}

.menu-btn {
    display: block;
    width: 280px;
    margin: 0.8rem auto;
    padding: 14px 32px;
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: #fff;
    background: linear-gradient(135deg, rgba(78,202,252,0.15), rgba(114,245,196,0.15));
    border: 1px solid rgba(78,202,252,0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.menu-btn:hover {
    background: linear-gradient(135deg, rgba(78,202,252,0.3), rgba(114,245,196,0.3));
    border-color: rgba(78,202,252,0.6);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(78,202,252,0.2);
}

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

.settings-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1rem 0;
}

.settings-group label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.6);
    min-width: 50px;
    text-align: right;
}

.settings-group select {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(78,202,252,0.2);
    border-radius: 6px;
    color: #fff;
    padding: 8px 16px;
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.95rem;
    cursor: pointer;
    min-width: 160px;
}

.settings-group select option {
    background: #121a2e;
}

.controls-info {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.controls-info h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    color: rgba(78,202,252,0.7);
    margin-bottom: 1rem;
}

.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 2rem;
    text-align: left;
    max-width: 550px;
    margin: 0 auto;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.control-item .key {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.7rem;
    background: rgba(78,202,252,0.12);
    border: 1px solid rgba(78,202,252,0.2);
    border-radius: 4px;
    padding: 3px 8px;
    min-width: 60px;
    text-align: center;
    color: #4ecafc;
}

/* ===== HUD ===== */
#hud {
    position: fixed; inset: 0;
    z-index: 100;
    pointer-events: none;
}

.player-count {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #72f5c4;
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(114,245,196,0.4);
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 16px;
    border: 1px solid rgba(114,245,196,0.3);
    border-radius: 8px;
    z-index: 100;
}

.landing-guide-message {
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    color: #ffd700;
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    text-shadow: 0 0 10px rgba(255,215,0,0.5);
    background: rgba(0, 0, 0, 0.6);
    padding: 10px 30px;
    border: 2px solid rgba(255,215,0,0.5);
    border-radius: 10px;
    z-index: 100;
    animation: pulseGlow 2s infinite alternate;
}

@keyframes pulseGlow {
    from { box-shadow: 0 0 5px rgba(255,215,0,0.2); }
    to { box-shadow: 0 0 20px rgba(255,215,0,0.6); }
}

/* Top heading bar */
.hud-top-bar {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 36px;
    overflow: hidden;
}

.heading-tape {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    white-space: nowrap;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.75rem;
    color: rgba(78,202,252,0.8);
    line-height: 36px;
    transition: transform 0.1s linear;
}

.heading-indicator {
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    color: #4ecafc;
    font-size: 0.8rem;
}

/* Left speed panel */
.hud-left-panel {
    position: absolute;
    left: 80px;
    top: 50%;
    transform: translateY(-50%);
    width: 90px;
    text-align: center;
}

.speed-tape, .alt-tape {
    height: 200px;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(78,202,252,0.2);
    border-radius: 4px;
    background: rgba(0,0,0,0.3);
    margin-bottom: 4px;
}

.speed-readout, .alt-readout {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    color: #72f5c4;
    text-shadow: 0 0 12px rgba(114,245,196,0.4);
    padding: 4px 0;
    background: rgba(0,0,0,0.5);
    border: 1px solid rgba(114,245,196,0.3);
    border-radius: 4px;
}

.hud-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.65rem;
    color: rgba(78,202,252,0.5);
    letter-spacing: 0.15em;
    margin-top: 2px;
}

/* Right altitude panel */
.hud-right-panel {
    position: absolute;
    right: 80px;
    top: 50%;
    transform: translateY(-50%);
    width: 100px;
    text-align: center;
}

/* Center attitude */
.hud-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
}

#attitude-canvas {
    border-radius: 50%;
    border: 2px solid rgba(78,202,252,0.2);
    background: transparent;
}

.flight-path-marker {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    color: rgba(114,245,196,0.8);
    text-shadow: 0 0 10px rgba(114,245,196,0.4);
    transition: all 0.15s ease;
}

/* Bottom Bar */
.hud-bottom-bar {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1.5rem;
    background: rgba(0,0,0,0.4);
    border: 1px solid rgba(78,202,252,0.15);
    border-radius: 8px;
    padding: 10px 24px;
    backdrop-filter: blur(4px);
}

.hud-info-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.hud-info-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.6rem;
    color: rgba(78,202,252,0.5);
    letter-spacing: 0.1em;
}

.hud-info-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    color: #72f5c4;
}

.hud-info-unit {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.55rem;
    color: rgba(78,202,252,0.4);
}

.gear-down { color: #72f5c4; }
.gear-up { color: #fc4e4e; }

.throttle-bar-container {
    width: 60px;
    height: 8px;
    background: rgba(255,255,255,0.08);
    border-radius: 4px;
    overflow: hidden;
}

.throttle-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #72f5c4, #4ecafc);
    border-radius: 4px;
    transition: width 0.15s ease;
}

/* Mini Map */
.hud-minimap {
    position: absolute;
    bottom: 80px;
    right: 20px;
    width: 180px;
    height: 180px;
    border: 1px solid rgba(78,202,252,0.2);
    border-radius: 50%;
    overflow: hidden;
    background: rgba(0,10,20,0.6);
}

#minimap-canvas {
    border-radius: 50%;
}

/* Warnings */
.stall-warning, .overspeed-warning {
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.15em;
    padding: 10px 30px;
    border-radius: 8px;
    animation: warningBlink 0.5s ease infinite alternate;
}

.stall-warning {
    color: #ff3333;
    background: rgba(255,0,0,0.15);
    border: 2px solid rgba(255,0,0,0.4);
}

.overspeed-warning {
    color: #ffaa00;
    background: rgba(255,170,0,0.15);
    border: 2px solid rgba(255,170,0,0.4);
    top: 32%;
}

@keyframes warningBlink {
    from { opacity: 1; }
    to { opacity: 0.3; }
}

/* ===== Pause Menu ===== */
#pause-menu {
    position: fixed; inset: 0;
    z-index: 500;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pause-content, .crash-content {
    text-align: center;
}

.pause-content h2, .crash-content h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    letter-spacing: 0.2em;
    color: #4ecafc;
    margin-bottom: 2rem;
}

/* ===== Crash Screen ===== */
#crash-screen {
    position: fixed; inset: 0;
    z-index: 600;
    background: rgba(30,0,0,0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.5s ease;
}

.crash-content h2 {
    color: #ff3333 !important;
}

.crash-content p {
    color: rgba(255,255,255,0.5);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .loading-title, .menu-title { font-size: 1.8rem; }
    .controls-grid { grid-template-columns: 1fr; }
    .hud-left-panel { left: 10px; }
    .hud-right-panel { right: 10px; }
    .hud-minimap { width: 120px; height: 120px; }
    #minimap-canvas { width: 120px; height: 120px; }
}