:root {
    --brand-navy: #00274A;
    --brand-lightblue: #3CBADC;
    --brand-green: #5BA62C;
    --bg-light: #F4F7F6;
    --text-dark: #333;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body { background-color: var(--bg-light); color: var(--text-dark); }
.hidden { display: none !important; }

/* Layout */
.app-layout { display: flex; height: 100vh; }

/* Sidebar */
.sidebar { width: 250px; background-color: var(--brand-navy); color: white; display: flex; flex-direction: column; }
.sidebar .brand { padding: 20px; font-size: 24px; letter-spacing: 2px; color: var(--brand-lightblue); border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar ul { list-style: none; padding-top: 20px; }
.sidebar li { padding: 15px 20px; cursor: pointer; transition: 0.3s; }
.sidebar li:hover, .sidebar li.active { background-color: var(--brand-lightblue); color: var(--brand-navy); font-weight: bold; }

/* Main Content */
.content { flex: 1; padding: 30px; overflow-y: auto; }
.view { animation: fadeIn 0.3s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; border-bottom: 2px solid var(--brand-lightblue); padding-bottom: 10px; }
header h2 { color: var(--brand-navy); }

/* Buttons & Inputs */
.btn-primary { background-color: var(--brand-green); color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: pointer; font-weight: bold; }
.btn-primary:hover { filter: brightness(1.1); }
input, select { padding: 8px; border: 1px solid #ccc; border-radius: 4px; }

/* Dashboard Cards */
.metrics-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 30px; }
.metric-card { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); text-align: center; border-top: 4px solid var(--brand-lightblue); }
.metric-card.profit { border-top-color: var(--brand-green); }
.metric-card h3 { color: gray; font-size: 14px; margin-bottom: 10px; text-transform: uppercase; }
.metric-card p { font-size: 24px; font-weight: bold; color: var(--brand-navy); }
.metric-card.profit p { color: var(--brand-green); }

/* Data Tables */
.data-table { width: 100%; border-collapse: collapse; background: white; border-radius: 8px; overflow: hidden; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.data-table th { background-color: var(--brand-navy); color: white; padding: 12px; text-align: left; }
.data-table td { padding: 12px; border-bottom: 1px solid #eee; }
.data-table tr:hover { background-color: #f9f9f9; }

.chart-container { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-top: 20px; }