body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: #f0f2f5;
    color: #333;
}

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

.sidebar {
    width: 280px;
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.logo-container {
    padding: 20px 0;
    text-align: center;
    border-bottom: 1px solid #4a627a;
}

nav > button, .k7-menu > button {
    display: block;
    width: 100%;
    padding: 15px 20px;
    margin-bottom: 10px;
    background-color: #34495e;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    font-size: 1.1em;
    transition: background-color 0.3s, transform 0.2s;
}

nav > button:hover, .k7-menu > button:hover {
    background-color: #4a627a;
    transform: translateX(5px);
}

nav > button.active, .k7-menu > button.active {
    background-color: #1abc9c;
}

.k7-submenu {
    display: none;
    padding-left: 25px;
    border-left: 3px solid #1abc9c;
    margin-left: 10px;
}

.k7-submenu.expanded {
    display: block;
}

.k7-submenu a {
    display: block;
    color: #bdc3c7;
    padding: 12px 15px;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s;
}

.k7-submenu a:hover {
    background-color: #4a627a;
    color: white;
}

.k7-submenu a.active {
    background-color: #1abc9c;
    color: white;
    font-weight: bold;
}

#app-container {
    padding: 30px;
    flex: 1;
    overflow-y: auto;
}

.league-title, .district-title {
    font-size: 2em;
    color: #2c3e50;
    margin-bottom: 20px;
    border-bottom: 3px solid #1abc9c;
    padding-bottom: 10px;
}

.league-table {
    width: 100%;
    border-collapse: collapse;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    overflow: hidden;
}

.league-table th, .league-table td {
    padding: 15px 20px;
    border-bottom: 1px solid #ddd;
    text-align: center;
}

.league-table thead {
    background-color: #34495e;
    color: white;
    font-size: 1.1em;
}

.league-table tbody tr:nth-child(even) {
    background-color: #f8f9fa;
}

.league-table tbody tr:hover {
    background-color: #e9ecef;
}

.k7-league-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.district-card {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    padding: 20px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.district-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
}

.district-card-title {
    font-size: 1.6em;
    color: #2c3e50;
    text-align: center;
}

.district-container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.k7-data-section {
    margin-top: 30px;
}

.k7-section-title {
    font-size: 1.5em;
    color: #34495e;
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 2px solid #1abc9c;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
}

.schedule-table th, .schedule-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #e0e0e0;
    text-align: center;
}

.schedule-table thead {
    background-color: #ecf0f1;
    color: #2c3e50;
}