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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #076B3B 0%, #054d29 100%);
    min-height: 100vh;
}

/* Login Page Styles */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #076B3B;
}

button[type="submit"] {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #076B3B 0%, #054d29 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
}

.error {
    background: #fee;
    color: #c33;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
    border: 1px solid #fcc;
}

.hint {
    text-align: center;
    margin-top: 15px;
    color: #888;
    font-size: 14px;
}

/* Main Application Styles */
.header {
    background: white;
    padding: 20px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    color: #333;
    font-size: 24px;
}

.logout-btn {
    background: #EA4335;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
}

.logout-btn:hover {
    background: #d33828;
}

.controls {
    background: white;
    margin: 20px;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.search-container {
    position: relative;
    margin-bottom: 20px;
}

.search-container label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.depth-control {
    margin-bottom: 20px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}

.depth-control label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

#depthLimit {
    width: 100px;
    padding: 8px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

#depthLimit:focus {
    outline: none;
    border-color: #076B3B;
}

.depth-control .help-text {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: #666;
}

#userSearch {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

#userSearch:focus {
    outline: none;
    border-color: #076B3B;
}

.suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 2px solid #076B3B;
    border-top: none;
    border-radius: 0 0 5px 5px;
    max-height: 300px;
    overflow-y: auto;
    display: none;
    z-index: 1000;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.suggestions.active {
    display: block;
}

.suggestion-item {
    padding: 12px;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid #eee;
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:hover {
    background: #f0f0f0;
}

.suggestion-item strong {
    color: #076B3B;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.btn {
    padding: 10px 20px;
    background: #076B3B;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.btn:hover {
    background: #054d29;
}

.legend {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.legend h3 {
    margin-bottom: 10px;
    color: #333;
    font-size: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.legend-box {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    margin-right: 10px;
    border: 1px solid #ddd;
}

.stats {
    background: #f0f7ff;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #076B3B;
}

.stats h3 {
    margin-bottom: 10px;
    color: #333;
}

.stat-item {
    margin-bottom: 5px;
    color: #555;
}

#mindmap {
    margin: 20px;
    height: calc(100vh - 500px);
    min-height: 600px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border: 2px solid #eee;
}

/* Scrollbar Styling */
.suggestions::-webkit-scrollbar {
    width: 8px;
}

.suggestions::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.suggestions::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.suggestions::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .controls {
        margin: 10px;
        padding: 15px;
    }

    .button-group {
        flex-direction: column;
    }

    #mindmap {
        margin: 10px;
        height: 500px;
    }
}