/* --- CSS VARIABLE CONFIGURATION MATRIX --- */
:root {
    --bg-base: #0a0f1d;
    --panel-bg: rgba(15, 23, 42, 0.45);
    --panel-bg-nested: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.12);
    
    --text-pure: #ffffff;
    --text-primary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dark: #475569;
    
    --theme-blue: #38bdf8;
    --theme-blue-glow: rgba(56, 189, 248, 0.4);
    --theme-blue-hover: #0ea5e9;
    --theme-danger: #f43f5e;
    --theme-danger-glow: rgba(244, 63, 94, 0.3);
    
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

/* --- SYSTEM RESET & CORE SCENERY --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Cosmic Space Engine Background Visuals */
.space-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-image: 
        radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px),
        radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 40px);
    background-size: 550px 550px, 350px 350px, 250px 250px;
    background-position: 0 0, 40px 60px, 130px 270px;
    opacity: 0.25;
    animation: backgroundShift 120s linear infinite;
}

.ambient-glow {
    position: absolute;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    z-index: 2;
    background: radial-gradient(circle at 70% 30%, rgba(56, 189, 248, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 20% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

@keyframes backgroundShift {
    from { background-position: 0 0, 40px 60px, 130px 270px; }
    to { background-position: 550px 1100px, 390px 1110px, 1130px 1370px; }
}

/* --- GLASSMORPHISM STRUCTURAL CLASSES --- */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    border: 1px solid var(--glass-border);
    border-top: 1px solid var(--glass-highlight);
    border-left: 1px solid var(--glass-highlight);
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1), border-color 0.3s ease;
}

.glass-panel-nested {
    background: var(--panel-bg-nested);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 16px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

/* --- CORE LAYOUT INTERFACE --- */
.app-container {
    position: relative;
    z-index: 10;
    width: 95vw;
    height: 90vh;
    max-width: 1400px;
    max-height: 900px;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
}

/* --- SIDEBAR NAVIGATION --- */
.sidebar {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100%;
}

.brand h1 {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.8rem;
    letter-spacing: 2px;
    color: var(--text-pure);
}

.brand h1 span {
    color: var(--theme-blue);
    text-shadow: 0 0 10px var(--theme-blue-glow);
}

.brand .subtitle {
    font-size: 0.65rem;
    letter-spacing: 3px;
    color: var(--text-muted);
    font-weight: 600;
    margin-top: 2px;
}

.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
    width: 100%;
}

.interactive-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    padding: 14px 18px;
    border-radius: 10px;
    text-align: left;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
}

.nav-btn .icon {
    font-size: 1.1rem;
    transition: transform 0.2s ease;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-pure);
    border-left: 1px solid var(--theme-blue);
}

.nav-btn:hover .icon {
    transform: translateX(3px);
}

.nav-btn.active {
    background: rgba(56, 189, 248, 0.1);
    color: var(--theme-blue);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-left: 4px solid var(--theme-blue);
    text-shadow: 0 0 8px var(--theme-blue-glow);
}

.miner-status-card h3, .audio-controller h3 {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.stat-row span:last-child {
    font-weight: 700;
    font-family: var(--font-heading);
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--theme-blue), #a855f7);
    box-shadow: 0 0 8px var(--theme-blue-glow);
    transition: width 0.1s linear;
}

/* Audio interface elements */
.audio-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.action-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-pure);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--text-muted);
}

.action-btn.danger {
    border-color: var(--theme-danger-glow);
    color: var(--theme-danger);
    margin-top: 20px;
}

.action-btn.danger:hover {
    background: rgba(244, 63, 94, 0.15);
    border-color: var(--theme-danger);
    box-shadow: 0 0 12px var(--theme-danger-glow);
}

#volume-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    height: 4px;
    border-radius: 2px;
    outline: none;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-pure);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(255,255,255,0.8);
}

/* --- MAIN CONTENT FRAME SYSTEM --- */
.main-content {
    position: relative;
    height: 100%;
    width: 100%;
}

.content-section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.98);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

.content-section.active {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
}

/* --- DASHBOARD SECTION ELEMENTS --- */
.game-header {
    display: flex;
    justify-content: space-around;
    padding: 16px;
    width: 100%;
}

.header-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header-stat .label {
    font-size: 0.65rem;
    font-family: var(--font-heading);
    letter-spacing: 2px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.header-stat .value {
    font-size: 1.4rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-pure);
}

/* Canvas Simulation Viewport */
.canvas-wrapper {
    position: relative;
    flex-grow: 1;
    width: 100%;
    overflow: hidden;
    background: rgba(5, 8, 16, 0.6);
}

#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* Overlays inside canvas frame */
.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 20;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(5, 8, 16, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.canvas-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.overlay-card {
    max-width: 440px;
    width: 90%;
    padding: 32px;
    text-align: center;
}

.overlay-card h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 1px;
    margin-bottom: 12px;
    color: var(--text-pure);
}

.overlay-card h2.alert-text {
    color: var(--theme-danger);
    text-shadow: 0 0 15px var(--theme-danger-glow);
}

.overlay-card p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.summary-box {
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    border: 1px solid rgba(255,255,255,0.03);
}

.summary-box p {
    margin-bottom: 6px;
    font-family: var(--font-heading);
    font-size: 1rem;
}

.summary-box p:last-child { margin-bottom: 0; }

.pulse-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-pure);
    padding: 14px 28px;
    border-radius: 30px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 2px;
    cursor: pointer;
    box-shadow: 0 0 0 0 rgba(255,255,255,0.2);
    transition: all 0.2s ease;
    animation: pulseGlow 2s infinite;
}

.pulse-btn:hover {
    background: var(--text-pure);
    color: var(--bg-base);
    box-shadow: 0 0 20px rgba(255,255,255,0.4);
    animation: none;
}

@keyframes pulseGlow {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255,255,255,0.15); }
    70% { transform: scale(1.03); box-shadow: 0 0 0 12px transparent; }
    100% { transform: scale(1); box-shadow: 0 0 0 0 transparent; }
}

/* Upgrade Store Grid Layout */
.upgrades-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.upgrade-card {
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.upgrade-info h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-pure);
    margin-bottom: 4px;
}

.upgrade-info p {
    font-size: 0.7rem;
    color: var(--text-muted);
    line-height: 1.3;
}

.upgrade-action {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-pure);
    padding: 10px;
    border-radius: 10px;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    cursor: pointer;
    min-width: 85px;
    text-align: center;
    transition: all 0.2s ease;
}

.upgrade-action:hover {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--theme-blue);
    color: var(--theme-blue);
}

.upgrade-action .cost {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.upgrade-card.maxed .upgrade-action {
    background: rgba(255,255,255,0.02) !important;
    border-color: rgba(255,255,255,0.05) !important;
    color: var(--text-dark) !important;
    cursor: not-allowed;
}

/* --- FULL PANE GENERIC TEMPLATE --- */
.full-pane {
    height: 100%;
    padding: 32px;
    display: flex;
    flex-direction: column;
}

.full-pane h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: 1px;
    color: var(--text-pure);
    margin-bottom: 6px;
}

.section-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* Hangar Specific Sub-Layouts */
.hangar-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    flex-grow: 1;
}

.preview-box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    background: rgba(0,0,0,0.15);
}

.ship-silhouette {
    font-size: 5rem;
    color: var(--theme-blue);
    text-shadow: 0 0 30px var(--theme-blue-glow);
    animation: driftFloat 4s ease-in-out infinite;
    transform-origin: center;
}

@keyframes driftFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(5deg); }
}

.preview-box p {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--text-muted);
}

.customizer-options {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.customizer-options h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 8px;
}

.custom-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.custom-row label {
    font-size: 0.8rem;
    color: var(--text-primary);
}

.color-picker-group {
    display: flex;
    gap: 12px;
}

.color-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.color-dot:hover { transform: scale(1.1); }
.color-dot.active {
    border-color: var(--text-pure);
    transform: scale(1.05);
}

/* Glass Interactive Select/Input Nodes */
.glass-select {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    padding: 12px;
    border-radius: 8px;
    color: var(--text-pure);
    font-family: var(--font-body);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
}

.glass-select option {
    background: #0f172a;
    color: var(--text-pure);
}

/* Terminal Log System Design */
.log-terminal {
    flex-grow: 1;
    background: rgba(5, 8, 16, 0.7);
    font-family: 'Courier New', Courier, monospace;
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.terminal-header {
    background: rgba(255,255,255,0.03);
    padding: 10px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    gap: 6px;
}

.terminal-header .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
}

.term-title {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: 10px;
    letter-spacing: 1px;
}

.terminal-body {
    padding: 16px;
    overflow-y: auto;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.85rem;
}

.system-line { color: #64748b; }
.data-line { color: var(--theme-blue); }
.reward-line { color: #34d399; }

/* Settings Structure UI */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.setting-toggle-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.setting-toggle-item h4 {
    font-size: 0.95rem;
    color: var(--text-pure);
    margin-bottom: 2px;
}

.setting-toggle-item p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Sleek Switch Toggle */
.glass-switch {
    position: relative;
    width: 44px;
    height: 22px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.05);
    outline: none;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.3s;
}

.glass-switch:checked {
    background: rgba(56, 189, 248, 0.2);
    border-color: var(--theme-blue);
}

.glass-switch::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    top: 3px;
    left: 4px;
    background: var(--text-muted);
    transition: transform 0.3s, background 0.3s;
}

.glass-switch:checked::before {
    transform: translateX(20px);
    background: var(--theme-blue);
}

/* Utility Design Classes */
.text-glow {
    text-shadow: 0 0 10px var(--theme-blue-glow);
    color: var(--theme-blue) !important;
}

/* --- SCROLLBAR STYLE REDIRECTS --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.08);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }