:root {
    /* Colors */
    --matrix-green: #00FF41;
    --matrix-green-dim: rgba(0, 255, 65, 0.2);
    --bg-dark: #050505;
    --bg-panel: rgba(15, 15, 15, 0.6);
    --cyber-blue: #00f0ff;
    --cyber-blue-dim: rgba(0, 240, 255, 0.2);
    --cyber-purple: #b026ff;
    --text-main: #e0e0e0;
    --text-muted: #888888;
    
    /* Typography */
    --font-terminal: 'Fira Code', monospace;
    --font-ui: 'Inter', sans-serif;

    /* Effects */
    --glass-blur: blur(12px);
    --border-cyber: 1px solid rgba(0, 240, 255, 0.3);
    --border-matrix: 1px solid var(--matrix-green-dim);
    --glow-cyber: 0 0 10px rgba(0, 240, 255, 0.3);
    --glow-matrix: 0 0 10px rgba(0, 255, 65, 0.3);
    
    /* Grid & Structure */
    --grid-line: rgba(255, 255, 255, 0.03);
}

/* CRT Screen Effects */
@keyframes crt-flicker {
    0% { opacity: 0.98; }
    5% { opacity: 0.85; }
    10% { opacity: 0.98; }
    15% { opacity: 1; }
    50% { opacity: 0.98; }
    55% { opacity: 0.95; }
    60% { opacity: 0.98; }
    100% { opacity: 0.99; }
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100vh); }
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-ui);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    /* Subtle structural grid line background for Aerospace tech feel */
    background-image: 
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: center center;
}

#app-container {
    position: relative;
    z-index: 10;
    display: flex;
    height: 100vh;
    width: 100vw;
    padding: 2rem;
    gap: 2rem;
}

/* Three.js canvas should be behind everything */
#webgl-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* --------------------------------- */
/* Control Deck UI */
/* --------------------------------- */
#control-deck {
    width: 320px;
    background: var(--bg-panel);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--border-cyber);
    box-shadow: var(--glow-cyber);
    display: flex;
    flex-direction: column;
    padding: 2rem;
    position: relative;
    border-radius: 4px;
}

/* Aerospace crosshairs on corners */
.corner-crosshair {
    position: absolute;
    width: 10px;
    height: 10px;
    border-color: var(--cyber-blue);
    border-style: solid;
    opacity: 0.7;
}
.corner-crosshair.top-left { top: 0; left: 0; border-width: 2px 0 0 2px; }
.corner-crosshair.top-right { top: 0; right: 0; border-width: 2px 2px 0 0; }
.corner-crosshair.bottom-left { bottom: 0; left: 0; border-width: 0 0 2px 2px; }
.corner-crosshair.bottom-right { bottom: 0; right: 0; border-width: 0 2px 2px 0; }

.deck-header {
    margin-bottom: 3rem;
}

.status-indicator {
    width: 12px;
    height: 12px;
    background-color: var(--matrix-green);
    border-radius: 50%;
    box-shadow: var(--glow-matrix);
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; box-shadow: var(--glow-matrix); }
    50% { opacity: 0.5; box-shadow: none; }
    100% { opacity: 1; box-shadow: var(--glow-matrix); }
}

.deck-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    color: #fff;
}

.deck-header p {
    font-family: var(--font-terminal);
    font-size: 0.8rem;
    color: var(--cyber-blue);
}

.nav-links {
    list-style: none;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-terminal);
    font-size: 0.9rem;
    cursor: pointer;
    text-align: left;
    width: 100%;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn .bracket {
    color: transparent;
    transition: color 0.3s ease;
}

.nav-btn:hover, .nav-btn.active {
    color: var(--matrix-green);
    text-shadow: 0 0 5px var(--matrix-green-dim);
}

.nav-btn:hover .bracket, .nav-btn.active .bracket {
    color: var(--matrix-green);
}

.telemetry {
    font-family: var(--font-terminal);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.telemetry-row {
    display: flex;
    justify-content: space-between;
}

.cyber-text { color: var(--cyber-blue); }
.status-ok { color: var(--matrix-green); }

/* Nav Media Player */
.global-media-btn:hover {
    background: #333 !important;
    border-color: #666 !important;
    color: var(--matrix-green) !important;
}

#g-open-winamp:hover {
    text-shadow: 0 0 5px var(--cyber-blue);
}

/* --------------------------------- */
/* OS Environment */
/* --------------------------------- */
#os-environment {
    flex-grow: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#desktop {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 1.5rem;
    z-index: 1;
}

.desktop-icon {
    width: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    text-align: center;
    transition: transform 0.2s, background 0.2s;
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid transparent;
}

.desktop-icon:hover {
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    transform: scale(1.05);
}

.icon-img {
    font-size: 2.5rem;
    text-shadow: var(--glow-cyber);
}

.icon-label {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    color: #fff;
    background: rgba(0,0,0,0.6);
    padding: 2px 4px;
    border-radius: 4px;
    word-break: break-word;
}

/* --------------------------------- */
/* OS Windows */
/* --------------------------------- */
#windows-container {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 5;
    pointer-events: none; /* Let clicks pass through if empty */
}

.os-window {
    position: absolute;
    background: rgba(10, 10, 10, 0.95);
    border: 1px solid rgba(0, 240, 255, 0.5);
    box-shadow: 0 5px 20px rgba(0,0,0,0.8), var(--glow-cyber);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: both; /* Allow resizing */
    backdrop-filter: blur(10px);
    pointer-events: auto; /* Re-enable pointer events */
    min-width: 300px;
    min-height: 200px;
}

.os-window.hidden {
    display: none !important;
}

@keyframes window-zoom-in {
    0% {
        opacity: 0;
        transform: scale(0.1) translateY(100px);
        filter: blur(20px);
    }
    50% {
        opacity: 0.8;
        filter: blur(5px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
        filter: blur(0);
    }
}

.window-opening {
    animation: window-zoom-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.window-header {
    background: rgba(0, 240, 255, 0.15);
    padding: 0.4rem 0.8rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(0, 240, 255, 0.3);
    cursor: grab;
    user-select: none;
}

.window-header:active {
    cursor: grabbing;
}

.window-controls {
    display: flex;
    gap: 8px;
}

.win-btn {
    background: transparent;
    border: none;
    color: #fff;
    font-family: monospace;
    font-size: 1rem;
    cursor: pointer;
    line-height: 1;
    opacity: 0.7;
}

.win-btn:hover {
    opacity: 1;
    color: var(--cyber-blue);
    text-shadow: var(--glow-cyber);
}

.window-body {
    flex-grow: 1;
    padding: 1rem;
    overflow-y: auto;
    color: #fff;
    font-family: var(--font-ui);
    background: rgba(0,0,0,0.6);
}

/* --------------------------------- */
/* Mainframe Terminal Overrides */
/* --------------------------------- */
#mainframe-terminal {
    width: 800px; 
    height: 500px;
    top: 50px; 
    left: 350px;
    pointer-events: auto; /* So we can click */

    background: #020a02; /* Deeper, slightly green-tinted black for CRT */
    border: 2px solid #1a3320;
    box-shadow: 0 0 30px rgba(0, 255, 65, 0.2), inset 0 0 50px rgba(0, 0, 0, 0.9);
    border-radius: 12px; /* CRT corners are rounded */
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* 3D Fishbowl / CRT curve effect */
    transform: perspective(800px) rotateX(1deg) rotateY(0deg) translateZ(0);
    transform-style: preserve-3d;
    transform-origin: center center;
}

#mainframe-terminal.window-opening {
    animation: window-zoom-in-crt 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes window-zoom-in-crt {
    0% {
        opacity: 0;
        transform: perspective(800px) rotateX(1deg) rotateY(0deg) translateZ(-500px) scale(0.1);
        filter: blur(20px);
    }
    50% {
        opacity: 0.8;
        filter: blur(5px);
    }
    100% {
        opacity: 1;
        transform: perspective(800px) rotateX(1deg) rotateY(0deg) translateZ(0) scale(1);
        filter: blur(0);
    }
}

/* CRT Screen Effects */
@keyframes crt-flicker {
    0% { opacity: 0.95; }
    5% { opacity: 0.85; }
    10% { opacity: 0.95; }
    15% { opacity: 1; }
    50% { opacity: 0.95; }
    55% { opacity: 0.92; }
    60% { opacity: 0.98; }
    100% { opacity: 0.99; }
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100vh); }
}

/* CRT Scanlines Overlay */
.crt::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        to bottom,
        rgba(18, 16, 16, 0) 50%,
        rgba(0, 0, 0, 0.35) 50%
    );
    background-size: 100% 4px;
    z-index: 50;
    pointer-events: none;
}

/* Moving Scanline & Vignette */
.crt::after {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* Vignette dark edges simulating glass curvature */
    background: radial-gradient(circle, rgba(0,0,0,0) 60%, rgba(0,0,0,0.8) 100%),
                /* Moving scanline */
                linear-gradient(to bottom, rgba(0, 255, 65, 0) 0%, rgba(0, 255, 65, 0.1) 50%, rgba(0, 255, 65, 0) 100%);
    background-size: 100% 100%, 100% 8px;
    z-index: 51;
    pointer-events: none;
    animation: crt-flicker 4s infinite;
}

/* A separate moving bar to simulate the refresh line */
.crt-refresh-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 15%;
    background: linear-gradient(to bottom, rgba(0, 255, 65, 0) 0%, rgba(0, 255, 65, 0.08) 50%, rgba(0, 255, 65, 0) 100%);
    opacity: 0.4;
    z-index: 49;
    pointer-events: none;
    animation: scanline 8s linear infinite;
}

.terminal-header {
    background: rgba(10, 20, 10, 0.9);
    padding: 0.3rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(0, 255, 65, 0.2);
    z-index: 10;
}

.term-title {
    font-family: var(--font-terminal);
    font-size: 0.7rem;
    color: var(--matrix-green);
    opacity: 0.7;
    flex-grow: 1;
    text-align: center;
    letter-spacing: 2px;
}

.terminal-body {
    flex-grow: 1;
    padding: 1.5rem;
    font-family: var(--font-terminal);
    font-size: 1rem;
    color: var(--matrix-green);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.terminal-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

#terminal-input {
    background: transparent;
    border: none;
    color: #fff;
    font-family: var(--font-terminal);
    font-size: 1rem;
    outline: none;
    flex-grow: 1;
    caret-color: transparent; /* We use custom cursor */
    padding: 0;
    margin: 0;
}

#terminal-input:focus + .cursor {
    animation: blink 1s step-end infinite;
}

.prompt {
    color: var(--cyber-blue);
    white-space: nowrap;
}

.typing-text {
    color: #fff;
    display: none; /* Hide when interactive */
}

.cursor {
    display: inline-block;
    width: 10px;
    height: 1.2em;
    background-color: #fff;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
    position: absolute;
    pointer-events: none;
}

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

/* Scrollbar styling for terminal */
.terminal-body::-webkit-scrollbar {
    width: 8px;
}
.terminal-body::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
}
.terminal-body::-webkit-scrollbar-thumb {
    background: var(--matrix-green-dim);
    border-radius: 4px;
}
.terminal-body::-webkit-scrollbar-thumb:hover {
    background: var(--matrix-green);
}

/* Terminal text styles */
.term-line {
    word-wrap: break-word;
    white-space: pre-wrap;
    line-height: 1.5;
}

.system-text {
    color: var(--text-muted);
}

.matrix-text {
    color: var(--matrix-green);
    text-shadow: 0 0 5px var(--matrix-green-dim);
}

/* --------------------------------- */
/* Mobile Responsiveness */
/* --------------------------------- */
@media (max-width: 768px) {
    body {
        overflow-y: auto; /* Allow scrolling the whole page if needed */
        height: auto;
    }

    #app-container {
        flex-direction: column;
        padding: 10px;
        gap: 20px;
        height: auto;
        min-height: 100vh;
        overflow: visible;
    }

    #control-deck {
        width: 100%;
        flex-shrink: 0;
        padding: 1.5rem;
    }

    #os-environment {
        width: 100%;
        height: 600px; /* Fixed height for the OS playground on mobile */
        flex-grow: 0;
        flex-shrink: 0;
        position: relative;
        border: 1px solid var(--matrix-green-dim);
        border-radius: 8px;
    }
    
    #desktop {
        flex-direction: row;
        gap: 15px;
        padding: 10px;
        overflow-y: auto;
    }

    .desktop-icon {
        width: 65px;
    }

    .icon-img {
        font-size: 2rem;
    }

    .icon-label {
        font-size: 0.65rem;
    }
    
    /* Make all floating windows fit the mobile screen exactly */
    .os-window {
        width: 100% !important;
        height: 100% !important;
        top: 0 !important;
        left: 0 !important;
        border-radius: 8px;
        transform: none !important; /* Remove 3D curves */
    }

    /* Keep the terminal window flush */
    #mainframe-terminal {
        width: 100% !important;
        height: 100% !important;
        top: 0 !important;
        left: 0 !important;
        transform: none !important;
    }

    #mainframe-terminal.window-opening {
        animation: window-zoom-in-mobile 0.4s ease-out forwards;
    }

    @keyframes window-zoom-in-mobile {
        0% { opacity: 0; transform: scale(0.9); }
        100% { opacity: 1; transform: scale(1); }
    }
}