:root {
    --bg-dark: #070a12;
    --bg-panel: #0d1321;
    --accent-blue: #00f2fe;
    --accent-green: #39ff14;
    --accent-red: #ff3333;
    --text-light: #e2e8f0;
    --text-muted: #64748b;
    --border-color: #1e293b;
    --font-mono: 'Courier New', Courier, monospace;
}

* {
    margin: 0; padding: 0; box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark); color: var(--text-light); line-height: 1.5;
}

.container { width: 90%; max-width: 1200px; margin: 0 auto; }
.section { padding: 60px 0; border-bottom: 1px solid var(--border-color); }
.bg-alt { background-color: #0b0f19; }

/* Navbar */
.navbar {
    background-color: var(--bg-panel); padding: 15px 0;
    border-bottom: 2px solid var(--border-color); position: sticky; top: 0; z-index: 100;
}
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-family: var(--font-mono); font-weight: bold; color: #fff; font-size: 1.2rem; }
.logo span { color: var(--accent-blue); }
.nav-menu a { color: var(--text-muted); text-decoration: none; margin-left: 20px; font-weight: 500; font-size: 0.95rem; }
.nav-menu a:hover { color: var(--accent-blue); }

/* Tech Typography */
.tech-title { font-family: var(--font-mono); font-size: 1.8rem; margin-bottom: 10px; border-left: 4px solid var(--accent-blue); padding-left: 12px; }
.tech-desc { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 30px; }

/* 1. Interactive Architecture Graph */
.arch-container { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 20px; }
.arch-graph { display: flex; flex-direction: column; align-items: center; }
.arch-layer {
    background: var(--bg-panel); border: 1px solid var(--border-color); width: 100%;
    padding: 20px; text-align: center; border-radius: 6px; cursor: pointer; transition: all 0.2s;
}
.arch-layer:hover { border-color: var(--accent-blue); box-shadow: 0 0 10px rgba(0, 242, 254, 0.2); }
.arch-layer h4 { font-family: var(--font-mono); margin-bottom: 5px; color: #fff; }
.arch-layer p { font-size: 0.85rem; color: var(--text-muted); }
.arch-vector { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); margin: 10px 0; }
.arch-details-box { background: #0b0f19; border: 1px solid var(--border-color); padding: 25px; border-radius: 6px; }
.arch-details-box h3 { font-family: var(--font-mono); font-size: 1.2rem; margin-bottom: 15px; color: var(--accent-blue); }

/* 2. Terminal Live Log */
.terminal-container { background: #020408; border: 1px solid var(--border-color); border-radius: 6px; overflow: hidden; }
.terminal-ctrls { background: #111827; padding: 10px; display: flex; gap: 10px; border-bottom: 1px solid var(--border-color); }
.ctrl-btn {
    background: #1e293b; border: 1px solid var(--border-color); color: #fff; padding: 6px 14px;
    border-radius: 4px; font-size: 0.85rem; cursor: pointer; font-family: var(--font-mono);
}
.ctrl-btn:hover { background: #334155; color: var(--accent-blue); }
.ctrl-btn.danger { border-color: var(--accent-red); }
.ctrl-btn.danger:hover { background: var(--accent-red); color: #fff; }
.terminal-screen { padding: 20px; height: 250px; overflow-y: auto; font-family: var(--font-mono); font-size: 0.9rem; }
.system-msg { color: #cbd5e1; margin-bottom: 6px; }

/* 3. MMU Calculator & Tables */
.calc-container { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; background: var(--bg-panel); padding: 30px; border-radius: 6px; border: 1px solid var(--border-color); }
.calc-inputs { display: flex; flex-direction: column; gap: 10px; }
.calc-inputs label { font-family: var(--font-mono); font-size: 0.9rem; }
.calc-inputs input { background: #020408; border: 1px solid var(--border-color); padding: 10px; border-radius: 4px; color: var(--accent-green); font-family: var(--font-mono); font-size: 1.1rem; }
.btn-primary { background: var(--accent-blue); color: #000; border: none; padding: 12px; font-weight: bold; border-radius: 4px; cursor: pointer; font-size: 0.95rem; }
.tech-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 0.85rem; }
.tech-table th, .tech-table td { border: 1px solid var(--border-color); padding: 10px; text-align: left; }
.tech-table th { background: #161f30; color: #fff; }
.tech-table td:nth-child(2) { color: var(--accent-green); }

/* 4. Code Blocks */
.code-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.code-box { background: #020408; border: 1px solid var(--border-color); border-radius: 6px; padding: 20px; }
.code-box h4 { font-family: var(--font-mono); margin-bottom: 10px; color: var(--accent-blue); }
pre { overflow-x: auto; font-family: var(--font-mono); font-size: 0.85rem; color: #a7f3d0; }

.tech-footer { text-align: center; padding: 25px; color: var(--text-muted); font-family: var(--font-mono); font-size: 0.8rem; }