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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.1em;
    opacity: 0.9;
}

.groups-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.group {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.group h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.8em;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 25px;
}

input {
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1em;
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.3);
}

button {
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #764ba2;
}

button:active {
    transform: scale(0.98);
}

.teams-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.team-card {
    background: #f5f5f5;
    border-left: 5px solid #667eea;
    padding: 15px;
    border-radius: 6px;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.team-card h3 {
    color: #333;
    margin-bottom: 5px;
    font-size: 1.2em;
}

.team-card p {
    color: #666;
    font-size: 0.95em;
    font-style: italic;
    margin-bottom: 10px;
}

.team-card button {
    background: #e74c3c;
    padding: 8px 15px;
    font-size: 0.9em;
    width: 100%;
}

.team-card button:hover {
    background: #c0392b;
}

.reset-button {
    width: 100%;
    background: #e74c3c;
    padding: 15px;
    font-size: 1.1em;
    margin-top: 20px;
}

.reset-button:hover {
    background: #c0392b;
}

.empty-message {
    color: #999;
    text-align: center;
    padding: 20px;
    font-style: italic;
}

@media (max-width: 768px) {
    .groups-container {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 2em;
    }

    .group {
        padding: 20px;
    }
}