/* style.css */
:root {
    --bg-color: #f7ede2;     
    --text-dark: #222222;    
    --accent-purple: #6b4c8a; 
    --hl-cyan: #a8ffff;      
    --hl-yellow: #ffffa8;    
    --white: #ffffff;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: Consolas, "Courier New", Courier, monospace;
}

* { box-sizing: border-box; }

body {
    background-color: var(--bg-color);
    color: var(--text-dark);
    font-family: var(--font-sans);
    font-size: 1.1rem; line-height: 1.6;
    margin: 0; padding: 0;
}

.page-container { max-width: 1000px; margin: 0 auto; padding: 40px 20px; }

h1 { color: var(--accent-purple); font-size: 2.8rem; text-shadow: 2px 2px 0px var(--white); font-weight: 800; margin-bottom: 10px; line-height: 1.2;}
h2 { font-size: 1.6rem; border-bottom: 4px dotted var(--text-dark); padding-bottom: 10px; margin-top: 40px; font-weight: 700; }
h3 { font-size: 1.3rem; color: var(--accent-purple); margin-top: 30px; margin-bottom: 10px; font-weight: 700; }
.subtitle { font-size: 1.3rem; font-weight: bold; margin-bottom: 40px; color: var(--text-dark); }

.retro-box { background: var(--white); border: 2px solid var(--text-dark); box-shadow: 6px 6px 0px var(--text-dark); padding: 20px; margin: 20px 0; border-radius: 4px;}
.dashed-box { background: rgba(255, 255, 255, 0.5); border: 2px dashed var(--text-dark); padding: 20px; margin: 20px 0; border-radius: 4px;}

.hl-cyan { background-color: var(--hl-cyan); padding: 2px 6px; border: 1px solid var(--text-dark); font-weight: bold;}
.hl-yellow { background-color: var(--hl-yellow); padding: 2px 6px; border: 1px solid var(--text-dark); font-weight: bold;}

pre { background: var(--white); border: 2px solid var(--text-dark); padding: 15px; box-shadow: 4px 4px 0px var(--text-dark); font-size: 1rem; font-family: var(--font-mono); overflow-x: auto; border-radius: 4px;}
code { font-family: var(--font-mono); font-weight: bold; background: rgba(0,0,0,0.05); padding: 2px 4px; border-radius: 4px; }

/* Interactive Simulator Layouts */
.sim-container { display: flex; flex-direction: column; gap: 30px; margin-top: 30px; }
@media(min-width: 768px) { .sim-container { flex-direction: row; } }
.sim-left { flex: 1.2; display: flex; flex-direction: column; gap: 6px; }
.sim-right { flex: 1; display: flex; flex-direction: column; gap: 20px; }

.code-row { padding: 10px 12px; background: var(--white); border: 2px solid var(--text-dark); cursor: pointer; display: flex; justify-content: space-between; transition: 0.1s; font-size: 0.95rem; font-family: var(--font-mono); border-radius: 4px; }
.code-row:hover { transform: translate(-2px, -2px); box-shadow: 2px 2px 0px var(--text-dark); }
.code-row.active { background: var(--hl-cyan); box-shadow: 4px 4px 0px var(--text-dark); font-weight: bold; transform: translate(-2px, -2px); }
.code-row.executed { background: #e0e0e0; color: #555; }
.comment { font-size: 0.9rem; color: #666; font-family: var(--font-sans); font-weight: normal; }

.controls { display: flex; gap: 10px; margin-top: 15px; }
.action-btn { flex: 1; font-family: var(--font-sans); font-size: 1rem; font-weight: bold; background: var(--white); border: 2px solid var(--text-dark); box-shadow: 4px 4px 0px var(--text-dark); padding: 10px 15px; cursor: pointer; transition: 0.1s; border-radius: 4px; }
.action-btn:hover:not(:disabled) { background: var(--hl-yellow); }
.action-btn:active:not(:disabled) { box-shadow: 0px 0px 0px var(--text-dark); transform: translate(4px, 4px); }
.action-btn:disabled { background: #d1d5db; color: #6b7280; box-shadow: none; transform: translate(4px, 4px); cursor: not-allowed; border-color: #9ca3af; }

/* Tree/AST Styling */
.ast-node { border: 2px solid var(--text-dark); background: var(--white); padding: 8px 12px; margin: 4px 0 4px 20px; font-family: var(--font-mono); border-radius: 4px; font-weight: bold; transition: 0.2s;}
.ast-node.highlight { background: var(--hl-yellow); box-shadow: 3px 3px 0 var(--text-dark); transform: scale(1.02);}

.back-link { display: inline-block; margin-bottom: 20px; color: var(--accent-purple); font-weight: bold; text-decoration: none; border-bottom: 2px solid var(--accent-purple);}
.back-link:hover { background: var(--hl-yellow); }
/* --- NAVBAR --- */
.navbar {
    background-color: var(--white);
    border-bottom: 4px solid var(--text-dark);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0; 
    z-index: 100;
    box-shadow: 0 4px 0px rgba(0,0,0,0.1);
    flex-wrap: wrap;
    gap: 10px;
}

.nav-brand { 
    font-size: 1.5rem; 
    font-weight: 800; 
    color: var(--accent-purple); 
}

.nav-links { 
    display: flex; 
    gap: 10px; 
    overflow-x: auto; 
    align-items: center; 
    padding-bottom: 5px;
}

.nav-btn {
    background: var(--bg-color); 
    border: 2px solid var(--text-dark);
    padding: 8px 15px; 
    font-weight: bold; 
    cursor: pointer;
    box-shadow: 2px 2px 0 var(--text-dark); 
    transition: all 0.1s;
    font-family: var(--font-sans); 
    font-size: 1rem; 
    border-radius: 4px;
    text-decoration: none; 
    color: var(--text-dark); 
    white-space: nowrap;
}

.nav-btn:hover { 
    background: var(--hl-yellow); 
    transform: translate(-2px, -2px); 
    box-shadow: 4px 4px 0 var(--text-dark); 
}

.nav-btn.active { 
    background: var(--hl-cyan); 
    box-shadow: 0 0 0 transparent; 
    transform: translate(2px, 2px); 
}