:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg: #F9FAFB;
    --sidebar-bg: #FFFFFF;
    --text-main: #111827;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --white: #FFFFFF;
    --card-bg: #FFFFFF;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    position: fixed;
    height: 100vh;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.logo img {
    height: 32px;
}

.logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

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

nav a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s;
}

nav a:hover, nav a.active {
    background-color: #F3F4F6;
    color: var(--primary);
}

.content {
    margin-left: 260px;
    flex: 1;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 1.875rem;
    font-weight: 700;
}

.card {
    background-color: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
}

.widget {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
}

.kpi-card {
    text-align: center;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.kpi-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--primary-hover);
}