* {
    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;
    display: flex;
    flex-direction: column;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header-subtitle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
    margin: 0;
}

/* Toggle Switch Styles */
.search-toggle-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.search-toggle-container:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.search-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.search-label i {
    font-size: 1rem;
}

.toggle-switch {
    position: relative;
    width: 52px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 34px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.toggle-switch input:checked + .toggle-slider {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1), 0 0 10px rgba(56, 239, 125, 0.4);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

.toggle-switch input:focus + .toggle-slider {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.toggle-status {
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    min-width: 45px;
    text-align: center;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.chat-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 600px;
}

.chat-messages {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.message {
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.3s ease-out;
}

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

.user-message {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
    gap: 1rem;
}

.user-message .message-content {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 20px 20px 5px 20px;
    max-width: 70%;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.user-message .avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.bot-message {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.bot-message .avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #11998e, #38ef7d);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.bot-message .message-content {
    background: #f8f9fa;
    padding: 1rem 1.5rem;
    border-radius: 20px 20px 20px 5px;
    max-width: 85%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border: 1px solid #e9ecef;
}

.evidence-section {
    margin-top: 1rem;
}

.evidence-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
}

.evidence-header:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.evidence-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.evidence-toggle {
    transition: transform 0.3s ease;
}

.evidence-toggle.expanded {
    transform: rotate(180deg);
}

.evidence-items {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.evidence-items.expanded {
    max-height: 1000px;
}

.evidence-item {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 10px;
    margin-bottom: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.evidence-item:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.evidence-meta {
    background: #f8f9fa;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e9ecef;
    font-size: 0.9rem;
    color: #666;
}

.evidence-score {
    display: inline-block;
    background: linear-gradient(135deg, #11998e, #38ef7d);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-left: 0.5rem;
}

.evidence-text {
    padding: 1rem;
    line-height: 1.6;
    color: #444;
}

.input-container {
    padding: 1.5rem 2rem;
    background: white;
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

#question {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

#question:focus {
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.send-button {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    flex-shrink: 0;
}

.send-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.send-button:active {
    transform: translateY(0);
}

.send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
    font-style: italic;
}

.loading-dots {
    display: flex;
    gap: 0.2rem;
}

.loading-dot {
    width: 6px;
    height: 6px;
    background: #667eea;
    border-radius: 50%;
    animation: loadingDot 1.4s ease-in-out infinite both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes loadingDot {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.empty-state {
    text-align: center;
    color: #666;
    padding: 3rem 2rem;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #ccc;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: #888;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .user-message .message-content,
    .bot-message .message-content {
        max-width: 90%;
    }

    .input-container {
        padding: 1rem;
    }

    #question {
        padding: 0.75rem 1rem;
    }

    .send-button {
        width: 45px;
        height: 45px;
    }
}