:root {
    --bg-main: #f0f4f8;
    --bg-card: #ffffff;
    --banner-dark: #111e2e;
    --border-light: #e2e8f0;
    --text-main: #334155;
    --text-muted: #64748b;
    --accent-blue: #0284c7;
    --accent-cyan: #00bae2;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --bg-terminal: #0f172a;
}

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

body { 
    background-color: var(--bg-main); 
    color: var(--text-main); 
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top Header Banner */
header { 
    background-color: var(--banner-dark); 
    color: #ffffff;
    text-align: center; 
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}
header h1 { 
    font-size: 1.6rem; 
    font-weight: 700;
    letter-spacing: 0.5px;
}
header .subtitle { 
    color: #94a3b8; 
    font-size: 0.85rem; 
    margin-top: 0.4rem; 
    font-weight: 400;
}

/* Matrix Navigation Button */
.matrix-nav-container {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}
.matrix-btn {
    background-color: var(--accent-cyan);
    color: #ffffff;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.6rem 1.5rem;
    border-radius: 30px;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0, 186, 226, 0.3);
    border: none;
    cursor: pointer;
    transition: transform 0.2s;
}
.matrix-btn:hover {
    transform: scale(1.02);
}

/* Main Workspace Grid Layout */
main { 
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 1.5rem 3rem 1.5rem;
    flex: 1;
}

/* Drag & Drop Area */
#drop-zone {
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 5rem 2rem;
    text-align: center;
    background-color: var(--bg-card);
    cursor: pointer;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
    border-left: 5px solid var(--accent-cyan);
    transition: border-color 0.2s, background-color 0.2s;
}
#drop-zone.hover { 
    border-color: var(--accent-cyan); 
    background-color: #f8fafc; 
}
#drop-zone p { 
    font-size: 1.2rem; 
    color: #1e293b; 
    font-weight: 600;
    margin-bottom: 0.5rem; 
}
#drop-zone span { 
    color: var(--text-muted); 
    font-size: 0.85rem; 
}

.hidden { display: none !important; }

/* Dashboard Split Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}
@media (min-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 380px 1fr;
    }
}

/* Left Side Statistics Control Tower */
.control-tower {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
    border-left: 5px solid var(--accent-cyan);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    height: fit-content;
}
.tower-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Individual Stat Items */
.metric-item {
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 1rem;
}
.metric-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.metric-label { 
    font-size: 0.75rem; 
    color: var(--text-muted); 
    text-transform: uppercase; 
    font-weight: 600;
    letter-spacing: 0.5px;
}
.metric-value { 
    font-size: 1.6rem; 
    font-weight: 700; 
    color: var(--accent-blue); 
    margin-top: 0.2rem;
    font-family: monospace; 
}

/* Right Side Results Terminal View */
.terminal-window {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
    border-left: 5px solid var(--accent-green);
}
.window-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-weight: 700;
    color: #1e293b;
}
.status-badge {
    font-size: 0.7rem;
    background-color: #f1f5f9;
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    border: 1px solid var(--border-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Data Matrix Output Table */
.table-wrapper {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border-light);
    border-radius: 6px;
}
table { 
    width: 100%; 
    border-collapse: collapse; 
    text-align: left; 
}
th, td { 
    padding: 0.85rem 1rem; 
    border-bottom: 1px solid var(--border-light); 
    font-size: 0.85rem; 
}
th { 
    color: #475569; 
    background-color: #f8fafc; 
    font-weight: 600; 
}
tr:last-child td { border-bottom: none; }

.badge { 
    display: inline-block; 
    padding: 0.2rem 0.5rem; 
    border-radius: 4px; 
    font-size: 0.7rem; 
    font-weight: 700; 
}
.badge-error { background-color: #fee2e2; color: var(--accent-red); }
.badge-warn { background-color: #fef3c7; color: var(--accent-yellow); }
.badge-info { background-color: #e0f2fe; color: var(--accent-blue); }

.count-tag { font-family: monospace; font-weight: 700; color: #1e293b; }
.pattern-text { 
    font-family: monospace; 
    color: #0f172a; 
    word-break: break-all; 
    background-color: #f8fafc;
    padding: 0.4rem;
    border-radius: 4px;
    border: 1px solid #f1f5f9;
}

/* Bottom Footer Banner */
footer {
    background-color: var(--banner-dark);
    color: #94a3b8;
    font-size: 0.75rem;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #1e293b;
    margin-top: auto;
}
footer span { font-weight: 400; }