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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.main-header {
    background: #2c3e50;
    color: white;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #3498db;
}

.main-nav {
    display: flex;
    gap: 20px;
}

.main-nav a {
    color: white;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 4px;
    transition: background 0.3s;
}

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

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-logout {
    background: #e74c3c;
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 14px;
}

.container {
    max-width: 1400px;
    margin: 30px auto;
    padding: 0 20px;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.login-box h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-group textarea {
    resize: vertical;
}

.btn-primary, .btn-secondary, .btn-small, .btn-warning {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

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

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

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

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

.btn-small {
    padding: 6px 12px;
    font-size: 13px;
    background: #3498db;
    color: white;
}

.btn-warning {
    background: #f39c12;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card h3 {
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: #2c3e50;
}

.section {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.section h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.table-responsive {
    overflow-x: auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

.data-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-new { background: #3498db; color: white; }
.status-called { background: #9b59b6; color: white; }
.status-unreachable { background: #e67e22; color: white; }
.status-interested { background: #1abc9c; color: white; }
.status-followup { background: #f39c12; color: white; }
.status-closed { background: #27ae60; color: white; }
.status-rejected { background: #e74c3c; color: white; }
.status-active { background: #27ae60; color: white; }
.status-inactive { background: #95a5a6; color: white; }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.page-header h1 {
    color: #2c3e50;
}

.filters {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.filters input,
.filters select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.filters input[type="text"] {
    flex: 1;
    min-width: 200px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.detail-section {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.detail-section h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.info-row {
    padding: 10px 0;
    border-bottom: 1px solid #ecf0f1;
}

.notes-list {
    margin-top: 20px;
}

.note-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 15px;
}

.note-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.note-date {
    color: #7f8c8d;
    font-size: 13px;
}

.note-content {
    color: #555;
    line-height: 1.6;
}

.note-reminder {
    margin-top: 10px;
    padding: 8px;
    background: #fff3cd;
    border-radius: 4px;
    font-size: 13px;
}

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

.reminder-item {
    padding: 12px;
    background: #f8f9fa;
    border-left: 3px solid #f39c12;
    border-radius: 4px;
    display: flex;
    gap: 15px;
    align-items: center;
}

.reminder-time {
    font-weight: 600;
    color: #f39c12;
    min-width: 120px;
}

.reminder-note {
    color: #7f8c8d;
    font-size: 14px;
}

.error-message, .success-message, .warning-message {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.error-message {
    background: #fee;
    color: #c33;
    border-left: 4px solid #e74c3c;
}

.success-message {
    background: #efe;
    color: #3c3;
    border-left: 4px solid #27ae60;
}

.warning-message {
    background: #fff3cd;
    color: #856404;
    border-left: 4px solid #f39c12;
}

.duplicate-item {
    padding: 10px;
    background: white;
    margin: 10px 0;
    border-radius: 4px;
}

.form-container {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.inline-form input,
.inline-form select {
    flex: 1;
    min-width: 150px;
}

.form-section {
    background: white;
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.no-data {
    text-align: center;
    color: #7f8c8d;
    padding: 20px;
}

.main-footer {
    background: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
    margin-top: 50px;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .main-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .filters form {
        flex-direction: column;
    }
    
    .filters input[type="text"] {
        width: 100%;
    }
}