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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #f8f9fa;
    color: #202124;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.logo .material-icons {
    font-size: 32px;
    color: #4285f4;
}

.logo h1 {
    color: #202124;
    font-weight: 400;
    font-size: 28px;
}

/* Search Section */
.search-section {
    background: white;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.search-container h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #202124;
    font-weight: 400;
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group input {
    width: 100%;
    padding: 16px 50px 16px 16px;
    border: 2px solid #dadce0;
    border-radius: 24px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.input-group input:focus {
    border-color: #4285f4;
}

.input-group .material-icons {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #5f6368;
}

.threshold-group {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    justify-content: center;
}

.threshold-group label {
    font-weight: 500;
    color: #5f6368;
}

.threshold-group input[type="range"] {
    width: 200px;
    accent-color: #4285f4;
}

#threshold-value {
    font-weight: 500;
    color: #4285f4;
    min-width: 30px;
}

.search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #4285f4;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 16px;
    cursor: pointer;
    margin: 0 auto;
    transition: background-color 0.3s;
}

.search-btn:hover {
    background: #3367d6;
}

/* Results Section */
.results-section {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.results-header h3 {
    color: #202124;
    font-weight: 500;
}

.selection-controls {
    display: flex;
    gap: 10px;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background: #f8f9fa;
    border: 1px solid #dadce0;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.control-btn:hover {
    background: #e8f0fe;
}

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.result-card {
    border: 1px solid #dadce0;
    border-radius: 8px;
    padding: 20px;
    background: white;
    transition: all 0.3s;
    cursor: pointer;
}

.result-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.result-card.selected {
    border-color: #4285f4;
    background: #e8f0fe;
}

.card-header {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.card-info {
    flex: 1;
}

.card-id {
    font-size: 12px;
    color: #5f6368;
    font-weight: 500;
}

.card-title {
    font-size: 16px;
    font-weight: 500;
    color: #202124;
    margin: 5px 0;
}

.card-section {
    font-size: 14px;
    color: #5f6368;
    margin-bottom: 10px;
}

.similarity-score {
    background: #e8f0fe;
    color: #4285f4;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    margin-left: 10px;
}

.card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
}

.view-btn {
    background: #4285f4;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 16px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.view-btn:hover {
    background: #3367d6;
}

.select-checkbox {
    width: 20px;
    height: 20px;
    accent-color: #4285f4;
}

.chat-launch {
    text-align: center;
}

.chat-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #34a853;
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 24px;
    font-size: 16px;
    cursor: pointer;
    margin: 0 auto;
    transition: background-color 0.3s;
}

.chat-btn:hover:not(:disabled) {
    background: #2d8f47;
}

.chat-btn:disabled {
    background: #dadce0;
    cursor: not-allowed;
}

/* Chat Section */
.chat-section {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    height: 75vh;
    display: flex;
    flex-direction: column;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #dadce0;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background: #f8f9fa;
    border: 1px solid #dadce0;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
    border-bottom: 1px solid #dadce0;
    margin-bottom: 20px;
}

.message {
    margin-bottom: 15px;
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 80%;
}

.message.user {
    background: #4285f4;
    color: white;
    margin-left: auto;
}

.message.bot {
    background: #f1f3f4;
    color: #202124;
}

.chat-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.chat-input-group input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #dadce0;
    border-radius: 24px;
    outline: none;
}

.chat-input-group select {
    padding: 12px;
    border: 1px solid #dadce0;
    border-radius: 20px;
    outline: none;
}

.chat-input-group button {
    background: #4285f4;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 8px;
    max-width: 800px;
    max-height: 80vh;
    width: 90%;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #dadce0;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
}

.modal-body {
    padding: 20px;
    max-height: 60vh;
    overflow-y: auto;
    line-height: 1.6;
}

/* Loading */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4285f4;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility classes */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .search-section {
        padding: 20px;
    }
    
    .results-container {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .selection-controls {
        justify-content: center;
    }
    
    .threshold-group {
        flex-direction: column;
        gap: 10px;
    }
}