:root {
    --bg-color: #0A0A0F;
    --panel-bg: rgba(20, 20, 30, 0.6);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-main: #E0E0E0;
    --text-muted: #888899;
    
    --neon-cyan: #00F0FF;
    --neon-magenta: #FF003C;
    --neon-yellow: #FFEA00;
    --neon-green: #39FF14;
    --neon-gold: #FFD700;
    
    --font-ui: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background-color: var(--bg-color); color: var(--text-main); font-family: var(--font-ui); height: 100vh; display: flex; flex-direction: column; overflow-y: auto; padding: 20px; gap: 20px;}

#top-nav {
    display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--panel-border); padding-bottom: 15px;
}
.nav-link {
    color: var(--neon-cyan); text-decoration: none; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; transition: 0.2s;
}
.nav-link:hover { color: var(--neon-green); text-shadow: 0 0 8px var(--neon-green);}
h1 { font-size: 16px; color: var(--neon-magenta); letter-spacing: 3px; font-weight: 400;}

#app-container {
    display: flex; width: 100%; min-height: 400px; gap: 20px; flex: 1;
}

.glass-panel {
    background: var(--panel-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--panel-border); border-radius: 12px; padding: 20px; display: flex; flex-direction: column;
}
.panel-header h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 2px; color: var(--neon-cyan); margin-bottom: 20px; border-bottom: 1px solid var(--panel-border); padding-bottom: 10px; }

/* Left Panel: UI */
#calculator-panel { flex: 0 0 350px; }
#calc-display {
    background: #000; border: 1px solid var(--neon-cyan); border-radius: 8px; font-family: var(--font-mono); font-size: 32px; text-align: right; padding: 15px; color: var(--neon-green); margin-bottom: 20px; box-shadow: inset 0 0 10px rgba(0, 240, 255, 0.2);
}

#calc-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; flex-grow: 1;
}

#calc-grid button {
    background: transparent; border: 1px solid var(--panel-border); color: var(--text-main); font-family: var(--font-mono); font-size: 20px; border-radius: 8px; cursor: pointer; transition: 0.2s;
}

#calc-grid button:hover { background: rgba(255, 255, 255, 0.05); }

#calc-grid button.num-btn { color: #FFF; }
#calc-grid button.op-btn { color: var(--neon-yellow); border-color: rgba(255, 234, 0, 0.3); font-weight: bold;}
#calc-grid button.op-btn:hover { background: rgba(255, 234, 0, 0.1); box-shadow: 0 0 8px rgba(255, 234, 0, 0.3);}
#calc-grid button.func-btn { color: var(--neon-magenta); border-color: rgba(255, 0, 60, 0.3); font-weight: bold; }
#calc-grid button.func-btn:hover { background: rgba(255, 0, 60, 0.1); box-shadow: 0 0 8px rgba(255, 0, 60, 0.3);}

/* Right Panel: Terminal out */
#terminal-panel { flex: 1; }
#terminal-output { flex-grow: 1; overflow-y: auto; font-family: var(--font-mono); font-size: 13px; display: flex; flex-direction: column; gap: 8px; padding-right: 10px;}
#terminal-output p { line-height: 1.5; margin: 0;}

.sys-msg { color: var(--text-muted); }
.cmd-msg { color: var(--neon-cyan); }
.warn-msg { color: var(--neon-yellow); }
.err-msg { color: var(--neon-magenta); }
.success-msg { color: var(--neon-green); font-weight: bold; }
.header-msg { color: var(--neon-gold); font-weight: bold; border-top: 1px dashed var(--neon-gold); margin-top: 15px !important; padding-top: 15px;}

/* Bottom Panel: Rosetta Dictionary */
#rosetta-panel { flex: 0 0 auto;}
.dictionary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.dict-card { background: rgba(0,0,0,0.3); border: 1px solid var(--panel-border); padding: 15px; border-radius: 8px; }
.dict-card h3 { font-size: 16px; color: var(--text-main); margin-bottom: 10px; }
.dict-card p { font-size: 13px; line-height: 1.5; color: var(--text-muted); margin-bottom: 8px; }
.dict-card code { font-family: var(--font-mono); color: var(--neon-magenta); background: rgba(255,0,60,0.1); padding: 2px 6px; border-radius: 4px; font-size: 11px;}

/* D3 Graph Styles */
.link { fill: none; stroke: var(--neon-cyan); stroke-width: 1.5px; stroke-opacity: 0.6; }
.link.void { stroke: var(--text-muted); stroke-dasharray: 4,4; stroke-opacity: 0.3; }
.link.stress { stroke: var(--neon-yellow); stroke-width: 2.5px; stroke-opacity: 0.9; }
.node { cursor: pointer; }