:root {
    /* Space Color Palette */
    --clr-bg: #0a0b12; /* Deep space black */
    --clr-primary: #00f2fe; /* Neon cyan */
    --clr-primary-glow: rgba(0, 242, 254, 0.4);
    --clr-secondary: #4facfe; /* Deep blue */
    --clr-accent: #ff0844; /* Alert red / secondary accent */
    --clr-accent-glow: rgba(255, 8, 68, 0.4);
    --clr-success: #00b09b; /* Green */
    --clr-success-glow: rgba(0, 176, 155, 0.4);
    --clr-text: #e2e8f0;
    --clr-text-muted: #94a3b8;
    
    /* Glassmorphism */
    --glass-bg: rgba(16, 20, 31, 0.4);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-blur: blur(12px);

    /* Fonts */
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-body);
    color: var(--clr-text);
    background-color: var(--clr-bg);
    height: 100vh;
    overflow: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Background Image Layer */
.space-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('licensed-image\ \(1\).jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
    filter: brightness(0.6) contrast(1.2);
}

/* Grid Overlay on Background */
.space-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(rgba(0, 242, 254, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 242, 254, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
    pointer-events: none;
}

/* Glassmorphism Panels */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: 16px;
}

/* Main Layout container */
.app-container {
    width: 95%;
    height: 90vh;
    max-width: 1600px;
    display: flex;
    gap: 24px;
    padding: 24px;
    position: relative;
    z-index: 10;
}

/* Sidebar */
.sidebar {
    width: 300px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.brand h1 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 2px;
    line-height: 1.2;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.brand .highlight {
    color: var(--clr-primary);
    text-shadow: 0 0 15px var(--clr-primary-glow);
}

.level-nav {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.nav-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    text-align: left;
    color: var(--clr-text);
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.nav-btn.active {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(79, 172, 254, 0.1));
    border-color: var(--clr-primary);
    box-shadow: 0 0 20px var(--clr-primary-glow);
}

.nav-btn.active .level-num {
    color: var(--clr-primary);
    text-shadow: 0 0 10px var(--clr-primary-glow);
}

.level-num {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--clr-text-muted);
}

.level-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.level-title {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.level-desc {
    font-size: 0.85rem;
    color: var(--clr-text-muted);
}

.mission-briefing {
    margin-top: auto;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    border-left: 4px solid var(--clr-primary);
    position: relative;
    overflow: hidden;
}

.mission-briefing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 60px;
    height: 60px;
    background: var(--clr-primary);
    opacity: 0.1;
    filter: blur(20px);
}

.mission-briefing h3 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--clr-primary);
    margin-bottom: 10px;
    letter-spacing: 1.5px;
}

.mission-briefing p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--clr-text-muted);
}

/* Main Display Area */
.main-display {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: relative;
}

/* Canvas Area */
.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
}

.hud {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 16px;
    pointer-events: none;
}

.hud-item {
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.hud-label {
    color: var(--clr-text-muted);
}

.hud-value {
    color: #fff;
    font-weight: 700;
}

.status-online {
    color: var(--clr-primary);
    text-shadow: 0 0 10px var(--clr-primary-glow);
}

.status-warning {
    color: var(--clr-accent);
    text-shadow: 0 0 10px var(--clr-accent-glow);
}

/* Controls Panel */
.controls-panel {
    background: rgba(16, 20, 31, 0.8);
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 700px;
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.control-group {
    display: none;
    width: 100%;
    animation: fadeIn 0.4s ease-out;
}

.control-group.active {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.control-group h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: #fff;
    margin-bottom: 0;
    min-width: 130px;
}

.input-slider-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-slider-group label {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    display: flex;
    justify-content: space-between;
}

.input-slider-group span {
    color: var(--clr-primary);
    font-weight: 600;
}

/* Custom Range Slider */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--clr-primary);
    cursor: pointer;
    margin-top: -8px;
    box-shadow: 0 0 15px var(--clr-primary-glow);
    border: 2px solid #fff;
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

/* Buttons */
.btn-launch {
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    color: #000;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    border: none;
    padding: 16px 32px;
    border-radius: 8px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 0 20px var(--clr-primary-glow);
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-launch:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--clr-primary-glow), inset 0 0 10px rgba(255,255,255,0.5);
    filter: brightness(1.1);
}

.btn-launch:active {
    transform: translateY(1px);
}

.btn-primary {
    background: transparent;
    border: 2px solid var(--clr-primary);
    color: var(--clr-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: rgba(0, 242, 254, 0.1);
    box-shadow: 0 0 20px var(--clr-primary-glow);
}

/* Educational Overlay */
.edu-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    padding: 40px;
    z-index: 100;
    text-align: center;
    background: rgba(10, 11, 18, 0.95);
    border: 1px solid var(--clr-primary);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8), 0 0 30px var(--clr-primary-glow);
}

.edu-overlay h2 {
    font-family: var(--font-heading);
    color: var(--clr-primary);
    font-size: 2rem;
    margin-bottom: 24px;
    text-shadow: 0 0 15px var(--clr-primary-glow);
}

.edu-overlay p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 16px;
    color: var(--clr-text);
}

.edu-overlay ul {
    text-align: left;
    margin: 0 auto 32px auto;
    max-width: 400px;
    list-style: none; /* remove default bullets */
}

.edu-overlay li {
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
    line-height: 1.5;
}

.edu-overlay li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--clr-primary);
    font-family: var(--font-heading);
}

.edu-overlay strong {
    color: #fff;
}

/* Cartesian Inputs Layout */
.cartesian-inputs {
    display: flex;
    gap: 20px;
    margin-top: 15px;
}

.input-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-field label {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
}

.input-field input {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 12px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    width: 100px;
    text-align: center;
    outline: none;
    transition: border-color 0.3s;
}

.input-field input:focus {
    border-color: var(--clr-primary);
    box-shadow: 0 0 10px var(--clr-primary-glow);
}

/* Helper classes */
.hidden {
    display: none !important;
}

.warning-text {
    color: var(--clr-accent);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.formula {
    background: rgba(0,0,0,0.4);
    padding: 8px 16px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    margin: 10px 0;
    border-left: 3px solid var(--clr-secondary);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal {
    background: rgba(10, 11, 18, 0.95);
    padding: 40px;
    text-align: center;
    max-width: 500px;
}

.success-text {
    color: var(--clr-success);
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 20px;
    text-shadow: 0 0 20px var(--clr-success-glow);
}

.fail-text {
    color: var(--clr-accent);
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 20px;
    text-shadow: 0 0 20px var(--clr-accent-glow);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .control-group.active {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group h3, .btn-launch {
        align-self: center;
    }
}

/* --- NEW SPA VIEWS STYLING --- */
.view-section {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.5s ease-out;
}

.scrollable-view {
    overflow-y: auto;
    padding: 32px;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

/* Home View */
.home-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.story-header { margin-bottom: 20px; }
.year-badge {
    background: var(--clr-accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 4px;
    font-family: var(--font-heading);
    letter-spacing: 2px;
}
.story-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    margin-top: 10px;
}
.story-desc {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--clr-text-muted);
}
.commander-profile {
    display: flex;
    align-items: center;
    gap: 24px;
    background: rgba(255,255,255,0.05);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}
.avatar-container {
    width: 80px;
    height: 80px;
    background: rgba(0, 242, 254, 0.2);
    border: 2px solid var(--clr-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
}
.home-actions {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}
.tests-links {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.pra-pasca-links {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}
.link-btn {
    padding: 10px 20px;
    background: rgba(255,255,255,0.1);
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
}
.link-btn:hover { background: rgba(255,255,255,0.2); }
.link-btn.pra-btn { border: 1px solid #00f2fe; }
.link-btn.pasca-btn { border: 1px solid #00b09b; }

/* Training View */
.view-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--clr-primary);
    margin-bottom: 30px;
}
.notes-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
}
.note-card {
    background: rgba(255,255,255,0.05);
    padding: 24px;
    border-radius: 12px;
    border-top: 4px solid var(--clr-text-muted);
}
.note-card.vector-card {
    border-color: var(--clr-primary);
    background: rgba(0, 242, 254, 0.05);
}
.training-sim {
    padding: 24px;
    margin-top: 20px;
}
.training-canvas-container {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 20px 0;
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
}
#trainingCanvas { cursor: crosshair; }
.sim-info {
    text-align: center;
    font-size: 1.2rem;
    font-family: var(--font-heading);
}

/* Arena View specific layout */
.arena-workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    padding-top: 16px;
}
.arena-nav {
    display: flex;
    gap: 12px;
    padding: 12px;
    margin-bottom: 16px;
    justify-content: center;
}
.lvl-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--clr-text);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-heading);
}
.lvl-btn.active {
    background: var(--clr-primary);
    color: #000;
}

/* Leaderboard View */
.leaderboard-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}
.score-summary-card {
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--clr-primary);
    padding: 40px;
    border-radius: 16px;
    margin-bottom: 40px;
}
.big-score {
    font-size: 5rem;
    font-family: var(--font-heading);
    color: #fff;
    margin: 20px 0;
}
.badges-container {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 40px;
}
.badge-item {
    background: rgba(255,255,255,0.05);
    padding: 24px;
    border-radius: 12px;
    width: 200px;
    border: 1px solid rgba(255,255,255,0.1);
}
.badge-item.unlocked {
    background: rgba(0, 176, 155, 0.1);
    border-color: var(--clr-success);
}
.badge-item.locked {
    opacity: 0.5;
    filter: grayscale(100%);
}
.badge-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}