:root {
    /* Pure Institutional Theme - No Gold */
    --bg-main: #0B0F19;
    --bg-sidebar: #111827;
    --bg-card: #1F2937;
    --bg-input: #374151;
    
    --text-primary: #F8FAFC;
    --text-muted: #9CA3AF;
    
    --accent-blue: #0EA5E9; /* Ice Blue */
    --accent-blue-hover: #0284C7;
    
    --border-color: #374151;
    --radius-md: 8px; /* Sharper corners */
    --radius-sm: 4px;
}


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


body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
}


.app-container { display: flex; min-height: 100vh; }


.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 24px 16px;
    display: flex; flex-direction: column;
}


.logo h2 {
    font-size: 22px; font-weight: 700;
    margin-bottom: 40px; padding-left: 12px;
}


.logo span { font-weight: 300; }


.nav-menu { display: flex; flex-direction: column; gap: 8px; }


.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 12px; color: var(--text-muted);
    text-decoration: none; border-radius: var(--radius-sm);
    font-weight: 500; transition: all 0.2s ease;
}


.nav-item:hover { background-color: var(--bg-card); color: var(--text-primary); }


.nav-item.active {
    background-color: rgba(14, 165, 233, 0.1);
    color: var(--accent-blue);
    border-left: 3px solid var(--accent-blue);
}


.nav-item.locked { opacity: 0.5; cursor: not-allowed; }


.main-content {
    flex: 1; padding: 40px;
    max-width: 1400px; margin: 0 auto; width: 100%;
}


.top-header {
    display: flex; justify-content: space-between;
    align-items: center; margin-bottom: 32px;
}


.top-header h1 { font-size: 28px; margin-bottom: 4px; }
.subtitle { color: var(--text-muted); font-size: 14px; }


.dashboard-grid {
    display: grid;
    grid-template-columns: 450px minmax(0, 1fr); 
    gap: 24px; align-items: start;
}


.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    min-width: 0;
}


.card-title {
    font-size: 16px; font-weight: 600;
    margin-bottom: 20px; padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}


.input-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 16px; margin-bottom: 24px;
}


.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full-width { grid-column: span 2; }


label {
    font-size: 13px; color: var(--text-muted); font-weight: 500;
    white-space: normal; word-wrap: break-word;
}


input[type="number"], select {
    width: 100%; max-width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 12px; border-radius: var(--radius-sm);
    font-family: inherit; font-size: 14px; outline: none;
    transition: border-color 0.2s;
}


input[type="number"]:focus, select:focus { border-color: var(--accent-blue); }


input[type="range"] { width: 100%; accent-color: var(--accent-blue); }
.range-val { font-size: 12px; text-align: right; color: var(--accent-blue); font-weight: 600; }


button {
    font-family: inherit; font-weight: 600;
    border-radius: var(--radius-sm); cursor: pointer;
    transition: all 0.2s ease;
}


.btn-primary {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary); padding: 10px 20px;
}


.btn-primary:hover { background-color: var(--bg-input); }


.btn-submit {
    width: 100%; background-color: var(--text-primary);
    color: var(--bg-main); border: none;
    padding: 12px; font-size: 14px; text-transform: uppercase;
    letter-spacing: 1px;
}


.btn-submit:hover { background-color: #E2E8F0; }


.tabs-container { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }


.tab-btn {
    background-color: transparent; border: 1px solid var(--border-color);
    color: var(--text-muted); padding: 8px 16px;
    border-radius: 2px; font-size: 13px;
}


.tab-btn:hover { border-color: var(--text-muted); color: var(--text-primary); }


.tab-btn.active-tab {
    background-color: var(--text-primary);
    border-color: var(--text-primary); color: var(--bg-main);
}


.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state svg { margin-bottom: 16px; opacity: 0.5; }


.data-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px; margin-bottom: 20px;
}


.data-box {
    background-color: var(--bg-input); padding: 16px;
    border-radius: var(--radius-sm); border: 1px solid var(--border-color);
}


.data-label {
    display: block; font-size: 11px; color: var(--text-muted);
    margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px;
}


.data-value { display: block; font-size: 24px; font-weight: 600; color: var(--text-primary); }
.data-value.highlight { color: var(--accent-blue); }


.behavior-feedback {
    font-size: 15px; line-height: 1.6; padding: 16px;
    background-color: rgba(14, 165, 233, 0.05);
    border-left: 3px solid var(--accent-blue);
    margin-bottom: 16px; color: var(--text-primary);
}


.hidden { display: none !important; }


@media (max-width: 1200px) { .dashboard-grid { grid-template-columns: 1fr; } }
@media (max-width: 768px) {
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
    .input-grid { grid-template-columns: 1fr; }
}