:root {
    --bg-color: #f4f6f9;
    --sidebar-bg: #2c3e50;
    --sidebar-text: #ecf0f1;
    --card-bg: #ffffff;
    --primary: #3498db;
    --success: #27ae60;
    --danger: #e74c3c;
    --warning: #f39c12;
    --purple: #8e44ad;
    --text-main: #333333;
    --text-muted: #7f8c8d;
    --border-color: #dddddd;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
}

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

#view-login {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

#sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 20px 0;
    flex-shrink: 0;
}

#main-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
}

.nav-btn {
    width: 100%;
    background: transparent;
    color: var(--sidebar-text);
    border: none;
    padding: 15px 20px;
    text-align: left;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-reports {
    background-color: var(--purple);
}

.btn-reports:hover {
    background-color: #9b59b6;
}

#btn-logout {
    margin: 20px 20px 0 20px;
    width: calc(100% - 40px);
}

#content {
    flex-grow: 1;
    padding: 30px;
    overflow-y: auto;
}

.card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.card-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.stat-card {
    flex: 1;
    min-width: 200px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border-left: 5px solid var(--border-color);
}

.stat-card h4 {
    margin: 0 0 10px 0;
    color: var(--text-muted);
    font-size: 14px;
}

.stat-card h2 {
    margin: 0;
    color: var(--sidebar-bg);
    font-size: 24px;
}

.border-success { border-left-color: var(--success); }
.border-danger { border-left-color: var(--danger); }
.border-info { border-left-color: var(--primary); }
.border-warning { border-left-color: var(--warning); }

input, select {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, select:focus {
    border-color: var(--primary);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 400px;
}

.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.form-inline input, .form-inline select {
    flex-grow: 1;
}

.btn {
    padding: 10px 15px;
    font-size: 14px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    color: white;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary { background-color: var(--primary); }
.btn-success { background-color: var(--success); }
.btn-danger { background-color: var(--danger); }
.btn-warning { background-color: var(--warning); }
.btn-secondary { background-color: var(--text-muted); }

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

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

th {
    background-color: var(--sidebar-bg);
    color: white;
    position: sticky;
    top: 0;
    z-index: 10;
}

tbody tr:hover {
    background-color: #f9f9f9;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-success { color: var(--success); font-weight: bold; }
.text-danger { color: var(--danger); font-weight: bold; }
.text-muted { color: var(--text-muted); font-size: 12px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.msg { margin-top: 10px; font-size: 14px; }
.link-primary { color: var(--primary); text-decoration: none; font-weight: bold; cursor: pointer; }
.link-primary:hover { text-decoration: underline; }
.table-container { overflow-y: auto; max-height: 400px; }