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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* Навигация */
.navbar {
    background: linear-gradient(135deg, #2c3e50, #3498db);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-fund {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
    flex-wrap: wrap;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-menu a:hover {
    background: rgba(255,255,255,0.2);
}

.nav-logout {
    background: rgba(231, 76, 60, 0.8) !important;
}

/* Контейнер */
.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1rem;
}

h1 {
    margin-bottom: 1.5rem;
    color: #2c3e50;
    border-bottom: 3px solid #3498db;
    padding-bottom: 0.5rem;
}

h2 {
    margin: 1.5rem 0 1rem;
    color: #34495e;
}

/* Алерты */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Карточки статистики */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card h3 {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: bold;
    color: #2c3e50;
}

.stat-card.positive .value { color: #27ae60; }
.stat-card.negative .value { color: #e74c3c; }
.stat-card.warning .value { color: #f39c12; }

/* Таблицы */
.table-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow-x: auto;
    margin-bottom: 2rem;
}

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

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

th {
    background: #34495e;
    color: white;
    font-weight: 600;
}

tr:hover {
    background: #f8f9fa;
}

/* Статусы */
.status-paid {
    background: #27ae60;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
}

.status-partial {
    background: #f39c12;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
}

.status-unpaid {
    background: #e74c3c;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* Формы */
.form-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 600px;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #34495e;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ecf0f1;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Кнопки */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #219a52;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Фильтры */
.filters {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filters .form-group {
    margin-bottom: 0;
    min-width: 150px;
}

/* Авторизация */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2c3e50, #3498db);
}

.auth-card {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    border: none;
}

/* Футер */
.footer {
    text-align: center;
    padding: 2rem;
    color: #7f8c8d;
    margin-top: 2rem;
}

/* Информационные блоки */
.info-block {
    background: #e8f4fd;
    border-left: 4px solid #3498db;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0 5px 5px 0;
}

/* Прогресс бар */
.progress-bar {
    height: 20px;
    background: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #27ae60, #2ecc71);
    transition: width 0.3s;
}

.progress-fill.partial {
    background: linear-gradient(90deg, #f39c12, #f1c40f);
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
}

/* Адаптивность */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-menu {
        margin-left: 0;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}