:root {
    --primary-color: #000000;
    --success-color: #000000;
    --warning-color: #fbbc05;
    --danger-color: #ea4335;
    --grey-color: #757575;
    --light-grey: #f5f5f5;
    --dark-grey: #000000;
    --blanck: #000000;
    --border-radius: 8px;
    --box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--light-grey);
    color: var(--dark-grey);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--blanck);
}

.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 20px;
    margin-bottom: 20px;
}

h2 {
    margin-bottom: 15px;
    color: var(--dark-grey);
    font-size: 1.3rem;
}

.btn {
    padding: 10px 15px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
    font-size: 1rem;
}

.primary {
    background-color: var(--primary-color);
    color: white;
}

.primary:hover {
    background-color: #3367d6;
}

.success {
    background-color: var(--success-color);
    color: white;
}

.success:hover {
    background-color: #2e8b46;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.status-message {
    font-size: 0.9rem;
    min-height: 20px;
    color: var(--grey-color);
}

.search-container {
    display: flex;
    gap: 10px;
}

.search-input-container {
    position: relative;
    flex: 1;
}

.search-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.suggestions-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: white;
    border: 1px solid #ddd;
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    max-height: 200px;
    overflow-y: auto;
    z-index: 10;
    box-shadow: var(--box-shadow);
    display: none;
}

.suggestion-item {
    padding: 10px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.suggestion-item:hover {
    background-color: var(--light-grey);
}

.suggestion-item.active {
    background-color: var(--primary-color);
    color: white;
}

.participant-data {
    margin-bottom: 20px;
}

.data-row {
    display: flex;
    margin-bottom: 8px;
}

.data-label {
    font-weight: 500;
    min-width: 120px;
}

.attendance-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status {
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 20px;
}

.attended {
    background-color: var(--success-color);
    color: white;
}

.not-attended {
    background-color: var(--danger-color);
    color: white;
}

.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.stat-item {
    flex: 1;
    min-width: 120px;
    text-align: center;
    padding: 10px;
    background-color: var(--light-grey);
    border-radius: var(--border-radius);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--grey-color);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

@media (max-width: 600px) {
    .button-group, .search-container {
        flex-direction: column;
    }
    
    .button-group button, .search-input, .search-container button {
        width: 100%;
    }
    
    .attendance-control {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .status {
        margin: 5px 0;
    }
    
    .stats {
        flex-direction: column;
        gap: 10px;
    }
}