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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #0b0f16 0%, #111827 100%);
    min-height: 100vh;
    padding: 20px;
    color: #e5e7eb;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    background: #0f172a;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6);
    border: 1px solid #1f2937;
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    color: #f9fafb;
    padding: 30px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.header-content h1 {
    font-size: 2.5em;
    margin: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.username {
    font-weight: 600;
    font-size: 1.1em;
}

.btn-logout {
    padding: 10px 20px;
    background: rgba(255,255,255,0.08);
    color: #f9fafb;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-logout:hover {
    background: rgba(255,255,255,0.15);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-card {
    background: rgba(255,255,255,0.2);
    padding: 20px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card.success { background: rgba(76, 175, 80, 0.3); }
.stat-card.warning { background: rgba(255, 152, 0, 0.3); }
.stat-card.danger { background: rgba(244, 67, 54, 0.3); }
.stat-card.info { background: rgba(33, 150, 243, 0.3); }

.stat-value {
    font-size: 2.5em;
    font-weight: bold;
}

.stat-label {
    font-size: 0.9em;
    opacity: 0.9;
    margin-top: 5px;
}

main {
    padding: 30px;
    background: #0f172a;
    color: #e5e7eb;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.controls-left, .controls-right {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    font-weight: 600;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
}

.btn-secondary {
    background: #ff9800;
}

.btn-secondary:hover {
    background: #f57c00;
}

.btn-export {
    padding: 12px 20px;
    background: #4caf50;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-export:hover {
    background: #45a049;
}

.controls input, .controls select {
    padding: 12px;
    border: 2px solid #2a2f3a;
    border-radius: 8px;
    font-size: 14px;
    background: #0b0f16;
    color: #e5e7eb;
}

.controls input:focus, .controls select:focus {
    outline: none;
    border-color: #667eea;
}

.controls input::placeholder {
    color: #9ca3af;
}

.charts-section {
    margin-bottom: 30px;
}

.chart-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: #111827;
    padding: 20px;
    border-radius: 10px;
    height: 360px;
    border: 1px solid #1f2937;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.chart-title h3 {
    margin: 0;
    color: #e5e7eb;
    font-size: 18px;
}

.chart-meta {
    color: #9ca3af;
    font-size: 12px;
    margin-top: 4px;
}

.chart-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.chip {
    background: #0b0f16;
    border: 1px solid #1f2937;
    color: #cbd5e1;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    cursor: pointer;
}

.chip.active {
    background: #2a2f3a;
    border-color: #667eea;
    color: #ffffff;
}

.chart-summary {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 4px 0 6px;
}

.summary-item {
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #0b0f16;
    border: 1px solid #1f2937;
    color: #cbd5e1;
}

.summary-item.total {
    border-color: #3b82f6;
    color: #93c5fd;
}

.summary-item.paid {
    border-color: #4caf50;
    color: #a7f3d0;
}

.summary-item.pending {
    border-color: #ff9800;
    color: #facc15;
}

.summary-item.overdue {
    border-color: #ef4444;
    color: #fecaca;
}

.chart-footer {
    margin-top: 6px;
    text-align: center;
    color: #6b7280;
    font-size: 11px;
}

.notifications-section {
    background: #2a1f00;
    border: 2px solid #f59e0b;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
}

.notification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.notification-header h3 {
    margin: 0;
    color: #fbbf24;
}

.notifications-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notification-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #111827;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #f59e0b;
}

.notification-content strong {
    display: block;
    margin-bottom: 5px;
    color: #fbbf24;
}

.notification-content p {
    margin: 5px 0;
    color: #e5e7eb;
}

.notification-content small {
    color: #9ca3af;
}

.clients-table {
    overflow-x: auto;
    background: #0b0f16;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

table {
    width: 100%;
    border-collapse: collapse;
    color: #e5e7eb;
}

thead {
    background: #111827;
    position: sticky;
    top: 0;
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #e5e7eb;
    cursor: pointer;
    user-select: none;
    border-bottom: 2px solid #1f2937;
}

th:hover {
    background: #1f2937;
}

td {
    padding: 15px;
    border-bottom: 1px solid #1f2937;
    color: #e5e7eb;
}

tr:hover {
    background: #111827;
}

tr.overdue {
    background: #3f1d1d;
}

.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
    display: inline-block;
}

.badge.success { background: #4caf50; color: white; }
.badge.warning { background: #ff9800; color: white; }
.badge.danger { background: #f44336; color: white; }
.badge.secondary { background: #9e9e9e; color: white; }

.btn-sm {
    padding: 6px 12px;
    margin: 0 3px;
    border: 1px solid #2a2f3a;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    background: #1f2937;
    color: #e5e7eb;
}

.btn-sm:hover {
    opacity: 0.8;
    transform: scale(1.1);
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow: auto;
}

.modal-content {
    background-color: #111827;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.6);
}

.close {
    color: #9ca3af;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 20px;
}

.close:hover {
    color: #ffffff;
}

.modal-content h2 {
    margin-bottom: 20px;
    color: #e5e7eb;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #cbd5e1;
    font-weight: 600;
}

.form-group .checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group .checkbox-row input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.form-group .checkbox-row label {
    display: inline-block;
    margin: 0;
    font-weight: 500;
    color: #cbd5e1;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #2a2f3a;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    background: #0b0f16;
    color: #e5e7eb;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
}

/* Адаптивность */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 15px;
    }
    
    header {
        padding: 20px;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .header-content h1 {
        font-size: 1.8em;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .controls-left, .controls-right {
        flex-direction: column;
    }
    
    .controls input,
    .controls select {
        width: 100%;
    }
    
    main {
        padding: 15px;
    }
    
    table {
        font-size: 14px;
    }
    
    th, td {
        padding: 10px 8px;
    }
    
    .chart-container {
        height: 250px;
    }
}

/* Тёмная тема (опционально) */
@media (prefers-color-scheme: dark) {
    /* Можно добавить поддержку тёмной темы */
}