:root {
    --bg-dark: #0f172a;
    --bg-panel: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 25%);
}

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

/* Glassmorphism utility */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

/* Sidebar */
.sidebar {
    width: 260px;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
    border-right: 1px solid var(--border-color);
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 1.5rem 2rem;
}

.logo h2 {
    font-size: 1.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-icon {
    font-size: 1.5rem;
}

.menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-section {
    padding: 1rem 1.5rem 0.5rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
}

.menu-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.95rem;
    text-align: left;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.menu-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.menu-btn.active {
    color: var(--text-primary);
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.2), transparent);
    border-left: 3px solid var(--accent);
}

.sidebar-footer {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.topbar {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 5;
}

.topbar h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.content-area {
    padding: 2rem;
    flex: 1;
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Typography & Utils */
.text-muted { color: var(--text-muted); }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1.5rem; }
.success { color: var(--success); }
.warning { color: var(--warning); }

/* Cards & Layout */
.card {
    border-radius: 12px;
    padding: 1.5rem;
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

/* Forms & Inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
}

.badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    margin-left: 6px;
}

.form-control {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.code-editor {
    width: 100%;
    background: #0b1120;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    color: #e2e8f0;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    resize: vertical;
    transition: var(--transition);
}

.code-editor:focus {
    outline: none;
    border-color: var(--accent);
}

/* Dashboards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.kpi-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.kpi-card h3 {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 700;
}

.dashboard-grid-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.chart-container {
    height: 300px;
    position: relative;
    display: flex;
    flex-direction: column;
}

.chart-container canvas {
    flex: 1;
    width: 100% !important;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table th, .data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.2);
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
}

/* Loader Modal */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(59, 130, 246, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 20px;
}

.spinner-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Custom Data Grid */
.custom-grid { width: 100%; overflow-x: auto; }
.custom-grid table { width: 100%; border-collapse: collapse; }
.custom-grid th, .custom-grid td { padding: 0.5rem; border-bottom: 1px solid var(--border-color); }
.custom-grid th { font-size: 0.85rem; color: var(--text-muted); text-align: left; }
.custom-grid input {
    width: 100%; background: rgba(0,0,0,0.1); border: 1px solid transparent; 
    color: var(--text-primary); padding: 0.5rem; border-radius: 4px; font-family: inherit; font-size: 0.9rem;
}
.custom-grid input:focus { background: rgba(0,0,0,0.3); border-color: var(--accent); outline: none; }
.btn-delete { background: transparent; border: none; color: var(--danger); cursor: pointer; font-size: 1.2rem; font-weight: bold;}
.btn-add-row {
    background: rgba(59, 130, 246, 0.1); color: var(--accent); border: 1px dashed var(--accent);
    width: 100%; padding: 0.5rem; cursor: pointer; margin-top: 0.5rem; border-radius: 6px; transition: var(--transition);
}
.btn-add-row:hover { background: rgba(59, 130, 246, 0.2); }

/* P&L Styles */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.pnl-box { background: rgba(0,0,0,0.2); padding: 1rem; border-radius: 8px; border-left: 4px solid var(--accent); }
.pnl-box.info { border-left-color: var(--warning); }
.pnl-box.success { border-left-color: var(--success); }
.pnl-label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.pnl-val { font-size: 1.5rem; font-weight: bold; }
.pnl-row-item { background: rgba(255,255,255,0.02); border: 1px solid var(--border-color); padding: 1rem; border-radius: 8px; margin-bottom: 0.5rem; }
.pnl-row-title { font-weight: 600; color: var(--accent); margin-bottom: 0.5rem; }
.pnl-row-details { display: flex; gap: 1.5rem; font-size: 0.9rem; color: #cbd5e1; }
.pnl-unit { font-size: 0.85rem; color: #94a3b8; }

/* Operational Report Styles */
.operational-grid-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.op-report-card {
    flex: 1;
    min-width: 300px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.op-report-card.full-width {
    flex: 1 1 100%;
}

.op-card-header {
    background: var(--accent);
    padding: 0.75rem 1rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: #fff;
}

.op-card-body {
    padding: 1rem;
}

.op-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.op-list li {
    font-size: 0.9rem;
    padding-left: 1.2rem;
    position: relative;
    color: var(--text-muted);
}

.op-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.op-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.op-table th, .op-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.op-table th {
    background: rgba(0,0,0,0.2);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.op-table tr:last-child td {
    border-bottom: none;
}

.card-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}