:root {
    --ui-scale: 1;
    --game-width: 100vw;
    --game-height: 100vh;
    --primary: #00e5ff;
    --primary-glow: rgba(0, 229, 255, 0.45);
    --secondary: #7c4dff;
    --accent: #ffab00;
    --danger: #ff3d71;
    --success: #00e676;
    --bg-panel: rgba(6, 12, 28, 0.78);
    --bg-panel-solid: rgba(8, 15, 34, 0.94);
    --border-light: rgba(0, 229, 255, 0.28);
    --text-main: #eef6ff;
    --text-muted: #8aa4c8;
    --font-display: 'Orbitron', 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', 'Segoe UI', Roboto, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #010308;
    color: var(--text-main);
    font-family: var(--font-body);
}

#game-container {
    position: relative;
    width: var(--game-width);
    height: var(--game-height);
    overflow: hidden;
    margin: 0 auto;
    background: radial-gradient(circle at center, #050b1a 0%, #010206 100%);
}

#space-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: 1;
}

/* Scaling wrapper for UI based on screen calculation */
.ui-layer {
    position: absolute;
    inset: 0;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: calc(16px * var(--ui-scale));
}

.interactive {
    pointer-events: auto;
}

/* ==================== MAIN MENU OVERLAY ==================== */
#main-menu {
    position: absolute;
    inset: 0;
    z-index: 100;
    background: radial-gradient(ellipse at 50% 35%, rgba(8, 22, 54, 0.55) 0%, rgba(2, 4, 12, 0.92) 100%);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: calc(28px * var(--ui-scale));
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#main-menu.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.menu-header {
    text-align: center;
    margin-top: calc(10px * var(--ui-scale));
}

.menu-badge {
    display: inline-block;
    padding: calc(5px * var(--ui-scale)) calc(14px * var(--ui-scale));
    border: 1px solid var(--border-light);
    border-radius: 999px;
    background: rgba(0, 229, 255, 0.08);
    color: var(--primary);
    font-family: var(--font-display);
    font-size: calc(11px * var(--ui-scale));
    letter-spacing: 2.5px;
    text-transform: uppercase;
    margin-bottom: calc(12px * var(--ui-scale));
}

.menu-title {
    font-family: var(--font-display);
    font-size: calc(46px * var(--ui-scale));
    font-weight: 900;
    letter-spacing: calc(6px * var(--ui-scale));
    text-transform: uppercase;
    background: linear-gradient(135deg, #ffffff 0%, #80d8ff 45%, #b388ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 35px rgba(0, 229, 255, 0.35);
    margin-bottom: calc(8px * var(--ui-scale));
}

.menu-subtitle {
    color: var(--text-muted);
    font-size: calc(15px * var(--ui-scale));
    max-width: calc(680px * var(--ui-scale));
    line-height: 1.5;
    margin: 0 auto;
}

.menu-content-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: calc(22px * var(--ui-scale));
    width: min(94vw, calc(1120px * var(--ui-scale)));
    max-height: 62vh;
}

.menu-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    border-radius: calc(14px * var(--ui-scale));
    padding: calc(20px * var(--ui-scale));
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.65), inset 0 0 24px rgba(0, 229, 255, 0.05);
    display: flex;
    flex-direction: column;
    gap: calc(14px * var(--ui-scale));
    overflow-y: auto;
}

.menu-card h3 {
    font-family: var(--font-display);
    font-size: calc(15px * var(--ui-scale));
    color: var(--primary);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(0, 229, 255, 0.15);
    padding-bottom: calc(8px * var(--ui-scale));
}

.galaxy-start-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(10px * var(--ui-scale));
}

.start-system-btn {
    background: rgba(14, 28, 58, 0.7);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: calc(10px * var(--ui-scale));
    padding: calc(11px * var(--ui-scale));
    text-align: left;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.22s ease;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.start-system-btn:hover,
.start-system-btn.active {
    background: rgba(0, 229, 255, 0.16);
    border-color: var(--primary);
    box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
    transform: translateY(-1px);
}

.start-system-btn .sys-galaxy {
    font-size: calc(10px * var(--ui-scale));
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.start-system-btn .sys-name {
    font-family: var(--font-display);
    font-size: calc(13px * var(--ui-scale));
    font-weight: 700;
    color: #fff;
}

.start-system-btn .sys-desc {
    font-size: calc(11px * var(--ui-scale));
    color: var(--text-muted);
    line-height: 1.35;
}

.controls-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(8px * var(--ui-scale));
    font-size: calc(12px * var(--ui-scale));
}

.ctrl-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.03);
    padding: calc(7px * var(--ui-scale)) calc(10px * var(--ui-scale));
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.key-pill {
    background: rgba(0, 229, 255, 0.14);
    border: 1px solid rgba(0, 229, 255, 0.4);
    color: var(--primary);
    font-family: var(--font-display);
    font-size: calc(10px * var(--ui-scale));
    padding: 2px 7px;
    border-radius: 4px;
    font-weight: 700;
}

.menu-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(12px * var(--ui-scale));
}

.launch-btn {
    background: linear-gradient(135deg, #00b4d8 0%, #0077b6 50%, #5e60ce 100%);
    color: #fff;
    border: 1px solid #80ffdb;
    border-radius: 999px;
    padding: calc(15px * var(--ui-scale)) calc(48px * var(--ui-scale));
    font-family: var(--font-display);
    font-size: calc(17px * var(--ui-scale));
    font-weight: 800;
    letter-spacing: 3px;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.5), inset 0 0 12px rgba(255, 255, 255, 0.35);
    transition: all 0.25s ease;
}

.launch-btn:hover {
    transform: scale(1.04);
    box-shadow: 0 0 45px rgba(0, 229, 255, 0.85), inset 0 0 18px rgba(255, 255, 255, 0.6);
}

.menu-footer {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: calc(12px * var(--ui-scale));
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: calc(12px * var(--ui-scale));
}

.version-tag {
    font-family: var(--font-display);
    color: var(--primary);
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid rgba(0, 229, 255, 0.3);
    padding: 4px 12px;
    border-radius: 6px;
    letter-spacing: 1px;
}

/* ==================== TOP HUD BAR ==================== */
.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: calc(14px * var(--ui-scale));
}

.hud-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-light);
    border-radius: calc(12px * var(--ui-scale));
    padding: calc(12px * var(--ui-scale)) calc(16px * var(--ui-scale));
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.location-panel {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: calc(290px * var(--ui-scale));
}

.loc-galaxy {
    font-size: calc(10px * var(--ui-scale));
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    font-family: var(--font-display);
}

.loc-system {
    font-size: calc(19px * var(--ui-scale));
    font-weight: 800;
    font-family: var(--font-display);
    color: #fff;
    text-shadow: 0 0 12px var(--primary-glow);
}

.loc-coords {
    font-size: calc(11px * var(--ui-scale));
    color: var(--text-muted);
    font-family: monospace;
}

/* Compass / 360 Orientation Tape */
.compass-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: calc(340px * var(--ui-scale));
}

.compass-bar {
    width: 100%;
    height: calc(24px * var(--ui-scale));
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compass-readout {
    font-family: var(--font-display);
    font-size: calc(11px * var(--ui-scale));
    color: var(--primary);
    letter-spacing: 1.5px;
}

.attitude-angles {
    display: flex;
    gap: calc(14px * var(--ui-scale));
    font-size: calc(11px * var(--ui-scale));
    color: var(--text-muted);
    font-family: monospace;
}

/* Quick Action Buttons Top Right */
.hud-actions {
    display: flex;
    gap: calc(8px * var(--ui-scale));
    flex-wrap: wrap;
    justify-content: flex-end;
}

.hud-btn {
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    color: var(--text-main);
    padding: calc(9px * var(--ui-scale)) calc(14px * var(--ui-scale));
    border-radius: calc(8px * var(--ui-scale));
    font-family: var(--font-display);
    font-size: calc(11px * var(--ui-scale));
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.hud-btn:hover,
.hud-btn.active {
    background: rgba(0, 229, 255, 0.2);
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
}

/* ==================== CENTER COCKPIT RETICLE ==================== */
.cockpit-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.reticle-ring {
    width: calc(76px * var(--ui-scale));
    height: calc(76px * var(--ui-scale));
    border: 1px solid rgba(0, 229, 255, 0.28);
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.reticle-ring::before,
.reticle-ring::after {
    content: '';
    position: absolute;
    background: var(--primary);
}

.reticle-ring::before {
    width: 12px;
    height: 1px;
}

.reticle-ring::after {
    width: 1px;
    height: 12px;
}

.reticle-dot {
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary);
}

#pointer-lock-hint {
    position: absolute;
    top: calc(50% + 54px * var(--ui-scale));
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.65);
    border: 1px solid rgba(0, 229, 255, 0.3);
    padding: 5px 14px;
    border-radius: 999px;
    font-size: calc(11px * var(--ui-scale));
    color: var(--primary);
    pointer-events: none;
    transition: opacity 0.3s ease;
    white-space: nowrap;
}

/* ==================== MIDDLE PANELS (SIDEBARS) ==================== */
.hud-middle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex: 1;
    margin: calc(12px * var(--ui-scale)) 0;
    pointer-events: none;
}

/* Left Navigation List */
.nav-sidebar {
    width: calc(280px * var(--ui-scale));
    max-height: 58vh;
    display: flex;
    flex-direction: column;
    gap: calc(8px * var(--ui-scale));
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-display);
    font-size: calc(12px * var(--ui-scale));
    color: var(--primary);
    letter-spacing: 1px;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(0, 229, 255, 0.2);
}

.body-list {
    display: flex;
    flex-direction: column;
    gap: 5px;
    overflow-y: auto;
    padding-right: 4px;
    max-height: 48vh;
}

.body-list::-webkit-scrollbar {
    width: 4px;
}
.body-list::-webkit-scrollbar-thumb {
    background: rgba(0, 229, 255, 0.35);
    border-radius: 4px;
}

.body-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: calc(7px * var(--ui-scale)) calc(10px * var(--ui-scale));
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.18s ease;
}

.body-item:hover,
.body-item.selected {
    background: rgba(0, 229, 255, 0.15);
    border-color: var(--primary);
}

.body-item-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.body-dot {
    width: calc(10px * var(--ui-scale));
    height: calc(10px * var(--ui-scale));
    border-radius: 50%;
    box-shadow: 0 0 8px currentColor;
}

.body-name {
    font-size: calc(12px * var(--ui-scale));
    font-weight: 600;
}

.body-type-tag {
    font-size: calc(10px * var(--ui-scale));
    color: var(--text-muted);
}

.body-dist {
    font-family: monospace;
    font-size: calc(11px * var(--ui-scale));
    color: var(--primary);
}

/* Right Target Inspector & LOD Telemetry */
.inspector-sidebar {
    width: calc(320px * var(--ui-scale));
    display: flex;
    flex-direction: column;
    gap: calc(10px * var(--ui-scale));
}

.target-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.target-name {
    font-family: var(--font-display);
    font-size: calc(18px * var(--ui-scale));
    font-weight: 800;
    color: #fff;
}

.target-badge {
    font-size: calc(10px * var(--ui-scale));
    padding: 2px 8px;
    border-radius: 99px;
    background: rgba(0, 229, 255, 0.15);
    border: 1px solid var(--primary);
    color: var(--primary);
}

.target-desc {
    font-size: calc(12px * var(--ui-scale));
    color: var(--text-muted);
    line-height: 1.45;
}

.telemetry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.stat-box {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 6px;
    padding: 6px 8px;
}

.stat-label {
    font-size: calc(10px * var(--ui-scale));
    color: var(--text-muted);
    text-transform: uppercase;
}

.stat-val {
    font-family: var(--font-display);
    font-size: calc(12px * var(--ui-scale));
    color: #fff;
    margin-top: 2px;
}

/* Progressive Surface Detail (LOD) Meter */
.lod-box {
    background: rgba(0, 229, 255, 0.06);
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: 8px;
    padding: 8px 10px;
}

.lod-header {
    display: flex;
    justify-content: space-between;
    font-size: calc(11px * var(--ui-scale));
    margin-bottom: 5px;
}

.lod-bar-bg {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 99px;
    overflow: hidden;
}

.lod-bar-fill {
    height: 100%;
    width: 25%;
    background: linear-gradient(90deg, #00b4d8, #00e676);
    box-shadow: 0 0 10px #00e676;
    transition: width 0.2s ease;
}

.target-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.action-btn {
    padding: calc(8px * var(--ui-scale)) calc(10px * var(--ui-scale));
    border-radius: 7px;
    border: 1px solid var(--primary);
    background: rgba(0, 229, 255, 0.14);
    color: #fff;
    font-family: var(--font-display);
    font-size: calc(11px * var(--ui-scale));
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: rgba(0, 229, 255, 0.32);
    box-shadow: 0 0 14px var(--primary-glow);
}

.action-btn.secondary {
    border-color: var(--accent);
    background: rgba(255, 171, 0, 0.14);
}

.action-btn.secondary:hover {
    background: rgba(255, 171, 0, 0.3);
}

/* ==================== BOTTOM FLIGHT DASHBOARD ==================== */
.hud-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: calc(14px * var(--ui-scale));
}

.flight-dashboard {
    display: flex;
    align-items: center;
    gap: calc(18px * var(--ui-scale));
    margin: 0 auto;
}

.speed-readout {
    display: flex;
    flex-direction: column;
    min-width: calc(180px * var(--ui-scale));
}

.speed-label {
    font-size: calc(10px * var(--ui-scale));
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.speed-value {
    font-family: var(--font-display);
    font-size: calc(24px * var(--ui-scale));
    font-weight: 800;
    color: var(--primary);
}

.eta-readout {
    font-size: calc(11px * var(--ui-scale));
    color: var(--accent);
    font-family: monospace;
    margin-top: 2px;
}

.drive-modes {
    display: flex;
    gap: 6px;
}

.drive-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-muted);
    padding: calc(7px * var(--ui-scale)) calc(11px * var(--ui-scale));
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-display);
    font-size: calc(10px * var(--ui-scale));
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.drive-btn.active {
    background: rgba(0, 229, 255, 0.18);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 0 12px var(--primary-glow);
}

.orbit-speed-ctrl {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: calc(160px * var(--ui-scale));
}

.orbit-speed-ctrl label {
    font-size: calc(10px * var(--ui-scale));
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.orbit-speed-ctrl input[type="range"] {
    accent-color: var(--primary);
    cursor: pointer;
}

/* ==================== GALAXY & SYSTEM MAP MODAL ==================== */
#galaxy-modal {
    position: absolute;
    inset: 0;
    z-index: 80;
    background: rgba(3, 7, 18, 0.88);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(28px * var(--ui-scale));
    transition: opacity 0.3s ease;
}

#galaxy-modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-window {
    width: min(92vw, calc(1050px * var(--ui-scale)));
    max-height: 85vh;
    background: var(--bg-panel-solid);
    border: 1px solid var(--primary);
    border-radius: 16px;
    padding: calc(24px * var(--ui-scale));
    display: flex;
    flex-direction: column;
    gap: calc(18px * var(--ui-scale));
    box-shadow: 0 0 60px rgba(0, 229, 255, 0.25);
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    padding-bottom: 12px;
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: calc(22px * var(--ui-scale));
    color: var(--primary);
}

.galaxy-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.galaxy-tab {
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: 8px;
    color: var(--text-main);
    font-family: var(--font-display);
    font-size: calc(12px * var(--ui-scale));
    cursor: pointer;
    transition: all 0.2s;
}

.galaxy-tab.active,
.galaxy-tab:hover {
    background: rgba(0, 229, 255, 0.22);
    border-color: var(--primary);
    box-shadow: 0 0 16px var(--primary-glow);
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(calc(280px * var(--ui-scale)), 1fr));
    gap: 14px;
}

.system-card {
    background: rgba(15, 26, 52, 0.75);
    border: 1px solid rgba(0, 229, 255, 0.22);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 12px;
    transition: all 0.2s;
}

.system-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 229, 255, 0.2);
}

/* 3D On-screen Target Marker */
#target-marker {
    position: absolute;
    width: 44px;
    height: 44px;
    border: 1.5px solid var(--accent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 5;
    box-shadow: 0 0 12px rgba(255, 171, 0, 0.6);
    display: none;
}

#target-marker::after {
    content: attr(data-label);
    position: absolute;
    top: 48px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-display);
    font-size: 10px;
    color: var(--accent);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.7);
    padding: 2px 6px;
    border-radius: 4px;
}

@media (max-width: 950px) {
    .menu-content-grid {
        grid-template-columns: 1fr;
    }
    .nav-sidebar, .inspector-sidebar {
        width: calc(220px * var(--ui-scale));
    }
}

/* ==================== SYSTEM LOADING OVERLAY ==================== */
.system-loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 250;
    background: radial-gradient(circle at center, rgba(3, 11, 28, 0.94) 0%, rgba(1, 2, 8, 0.98) 100%);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.system-loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: calc(26px * var(--ui-scale));
    border-radius: calc(16px * var(--ui-scale));
    background: rgba(10, 25, 47, 0.7);
    border: 1px solid rgba(0, 229, 255, 0.35);
    box-shadow: 0 0 50px rgba(0, 229, 255, 0.25);
    max-width: 90vw;
}

.loading-spinner-ring {
    width: calc(52px * var(--ui-scale));
    height: calc(52px * var(--ui-scale));
    border: 3px solid rgba(0, 229, 255, 0.15);
    border-top-color: var(--primary);
    border-right-color: var(--accent);
    border-radius: 50%;
    animation: spinRing 0.9s linear infinite;
    margin-bottom: calc(16px * var(--ui-scale));
}

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

.loading-title {
    font-family: var(--font-display);
    font-size: calc(17px * var(--ui-scale));
    color: #fff;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: calc(6px * var(--ui-scale));
}

.loading-subtitle {
    font-size: calc(13px * var(--ui-scale));
    color: var(--primary);
    margin-bottom: calc(14px * var(--ui-scale));
}

.loading-progress-bar {
    width: calc(260px * var(--ui-scale));
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: calc(10px * var(--ui-scale));
}

.loading-progress-fill {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #80d8ff, var(--accent));
    animation: loadingBarMove 1.4s ease-in-out infinite;
}

@keyframes loadingBarMove {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.loading-hint {
    font-size: calc(11px * var(--ui-scale));
    color: var(--text-muted);
}

/* ==================== COLLAPSIBLE PANELS & FLOATING TRIGGER PILLS ==================== */
.panel-close-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-muted);
    border-radius: 6px;
    width: calc(24px * var(--ui-scale));
    height: calc(24px * var(--ui-scale));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: calc(11px * var(--ui-scale));
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
}

.panel-close-btn:hover {
    background: rgba(255, 75, 75, 0.25);
    border-color: #ff5252;
    color: #fff;
}

.nav-sidebar, .inspector-sidebar, .flight-dashboard {
    transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.3s ease;
}

.nav-sidebar.collapsed {
    transform: translateX(calc(-100% - 30px));
    opacity: 0;
    pointer-events: none;
}

.inspector-sidebar.collapsed {
    transform: translateX(calc(100% + 30px));
    opacity: 0;
    pointer-events: none;
}

.flight-dashboard.collapsed {
    transform: translateY(calc(100% + 30px));
    opacity: 0;
    pointer-events: none;
}

/* Master HUD Hidden Mode */
.ui-layer.all-hud-hidden .hud-top,
.ui-layer.all-hud-hidden .hud-middle,
.ui-layer.all-hud-hidden .hud-bottom,
.ui-layer.all-hud-hidden .cockpit-center,
.ui-layer.all-hud-hidden #pointer-lock-hint,
.ui-layer.all-hud-hidden .hud-floating-pill:not(.restore-pill-btn) {
    opacity: 0 !important;
    pointer-events: none !important;
    visibility: hidden !important;
}

/* Floating Pills to restore panels */
.hud-floating-pill {
    position: absolute;
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    color: var(--text-main);
    padding: calc(8px * var(--ui-scale)) calc(14px * var(--ui-scale));
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: calc(11px * var(--ui-scale));
    letter-spacing: 0.8px;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
    transition: all 0.2s ease;
    z-index: 25;
    white-space: nowrap;
}

.hud-floating-pill:hover {
    border-color: var(--primary);
    background: rgba(0, 229, 255, 0.2);
    box-shadow: 0 0 15px var(--primary-glow);
}

.nav-pill-btn {
    left: calc(16px * var(--ui-scale));
    top: 50%;
    transform: translateY(-50%);
}

.inspector-pill-btn {
    right: calc(16px * var(--ui-scale));
    top: 50%;
    transform: translateY(-50%);
}

.dashboard-pill-btn {
    bottom: calc(16px * var(--ui-scale));
    left: 50%;
    transform: translateX(-50%);
}

.restore-pill-btn {
    top: calc(16px * var(--ui-scale));
    right: calc(16px * var(--ui-scale));
    background: rgba(0, 229, 255, 0.25);
    border-color: var(--primary);
    color: #fff;
    font-weight: 700;
}

.recenter-system-btn {
    top: calc(75px * var(--ui-scale));
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 229, 255, 0.2);
    border-color: var(--primary);
    color: var(--primary);
    font-weight: 700;
}

.recenter-system-btn:hover {
    background: var(--primary);
    color: #000;
}

/* Mobile & Tablet Optimizations */
@media (max-width: 900px) {
    .menu-content-grid {
        grid-template-columns: 1fr;
        max-height: 72vh;
    }
    .hud-middle {
        margin: 4px 0;
    }
    .nav-sidebar {
        width: min(85vw, 290px);
        position: absolute;
        left: 12px;
        top: 60px;
        z-index: 20;
    }
    .inspector-sidebar {
        width: min(85vw, 290px);
        position: absolute;
        right: 12px;
        top: 60px;
        z-index: 20;
    }
    .flight-dashboard {
        padding: 8px 12px;
    }
    .drive-modes {
        grid-template-columns: 1fr 1fr;
    }
}