:root {
    --navy: #001f3f;
    --navy-light: #003366;
    --green: #2ecc71;
    --white: #ffffff;
    --gray-bg: #f4f6f8;
    --gray-text: #6c757d;
    --border: #dee2e6;
    --shadow: 0 4px 6px rgba(0,0,0,0.05);
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--gray-bg);
    color: #333;
}

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

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--navy);
    color: var(--white);
    display: flex;
    flex-direction: column;
    padding: 20px;
    position: fixed;
    height: 100%;
}

.sidebar .logo h2 {
    margin: 0 0 30px;
    font-size: 1.5rem;
    font-weight: 700;
}

.user-profile {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.user-profile .avatar {
    width: 40px;
    height: 40px;
    background-color: var(--green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 12px;
}

.user-profile .info p {
    margin: 0;
    font-size: 0.9rem;
}

.user-profile .role {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
}

.nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    flex-grow: 1;
}

.nav-links li {
    margin-bottom: 8px;
}

.nav-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    display: block;
    padding: 10px 12px;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    background-color: var(--navy-light);
    color: var(--white);
}

.logout {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.logout a {
    color: #ff6b6b;
    text-decoration: none;
    font-size: 0.9rem;
}

/* Main Content */
.main-content {
    margin-left: 290px; /* sidebar width + padding */
    flex-grow: 1;
    padding: 30px;
    width: calc(100% - 290px);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.top-bar h1 {
    margin: 0;
    font-size: 1.75rem;
    color: var(--navy);
}

.card {
    background: var(--white);
    border-radius: 8px;
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

/* Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 30px;
}

.stat-card h3 {
    margin: 0 0 10px;
    font-size: 0.9rem;
    color: var(--gray-text);
    font-weight: 500;
}

.stat-card .value {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--navy);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-weight: 600;
    color: var(--gray-text);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.empty-state {
    text-align: center;
    color: var(--gray-text);
    padding: 30px;
}

/* Status Badges */
.status-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.status-badge.active, .status-badge.paid { background-color: rgba(46, 204, 113, 0.15); color: #2ecc71; }
.status-badge.completed, .status-badge.sent { background-color: rgba(52, 152, 219, 0.15); color: #3498db; }
.status-badge.on-hold, .status-badge.draft { background-color: rgba(241, 196, 15, 0.15); color: #f39c12; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    box-sizing: border-box;
}

.inline-form {
    display: flex;
    gap: 12px;
    align-items: flex-start; /* top align input fields */
}

.inline-form .form-group { margin-bottom: 0; }
.flex-grow { flex-grow: 1; }

.btn {
    padding: 10px 20px;
    border-radius: 4px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn.primary { background-color: var(--navy); color: var(--white); }
.btn.secondary { background-color: transparent; border: 1px solid var(--navy); color: var(--navy); }

/* Charts */
.chart-row {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.chart-row .label { width: 120px; font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chart-row .bar-wrapper { flex-grow: 1; background: #eee; border-radius: 4px; height: 24px; margin: 0 12px; overflow: hidden; }
.chart-row .bar { height: 100%; background: var(--navy); border-radius: 4px; }
.chart-row .bar.green { background: var(--green); }
.chart-row .value { width: 80px; text-align: right; font-weight: 600; font-size: 0.9rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; }
.mt-2 { margin-top: 24px; }
.mb-2 { margin-bottom: 24px; }
.h-fit { height: fit-content; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { width: 100%; position: relative; height: auto; }
    .main-content { margin-left: 0; width: 100%; padding: 20px; }
    .grid-2, .grid-2-1 { grid-template-columns: 1fr; }
    .inline-form { flex-direction: column; width: 100%; }
    .inline-form .form-group, .inline-form button { width: 100%; }
}