/**
 * NLWeb Chat - Pico-native styling
 * Uses only Pico CSS variables for automatic theme integration
 */

/* Main Container */
.nlweb-chat-container {
    display: flex;
    flex-direction: column;
    gap: var(--pico-spacing);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.nlweb-chat-container * {
    box-sizing: border-box;
}

/* Chat Header */
.nlweb-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pico-spacing);
}

.nlweb-chat-actions {
    display: flex;
    gap: calc(var(--pico-spacing) / 2);
}

.nlweb-new-chat-btn,
.nlweb-history-btn {
    padding: calc(var(--pico-spacing) / 2) var(--pico-spacing);
    font-size: 0.875rem;
}

/* Messages Container */
.nlweb-chat-messages {
    display: flex;
    flex-direction: column;
    gap: var(--pico-spacing);
    max-height: 60vh;
    min-height: 200px;
    overflow-y: auto;
    padding: var(--pico-spacing);
    background-color: var(--pico-background-color);
    border: var(--pico-border-width) solid var(--pico-muted-border-color);
    border-radius: var(--pico-border-radius);
}

/* Hidden state initially */
.nlweb-chat-messages.nlweb-chat-hidden {
    display: none;
}

/* Custom scrollbar styling */
.nlweb-chat-messages::-webkit-scrollbar {
    width: 8px;
}

.nlweb-chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.nlweb-chat-messages::-webkit-scrollbar-thumb {
    background-color: var(--pico-muted-border-color);
    border-radius: var(--pico-border-radius);
}

.nlweb-chat-messages::-webkit-scrollbar-thumb:hover {
    background-color: var(--pico-primary);
}

/* Empty state */
.nlweb-chat-messages:empty::before {
    content: "Ask a question to get started...";
    display: block;
    text-align: center;
    color: var(--pico-muted-color);
    padding: var(--pico-block-spacing-vertical);
}

/* Message Elements */
.nlweb-message {
    display: flex;
    flex-direction: column;
    gap: calc(var(--pico-spacing) / 2);
}

.nlweb-message-user {
    align-items: flex-end;
}

.nlweb-message-assistant {
    align-items: flex-start;
}

.nlweb-message-content {
    max-width: 85%;
    padding: var(--pico-spacing);
    border-radius: var(--pico-border-radius);
}

.nlweb-message-user .nlweb-message-content {
    background-color: var(--pico-primary);
    color: var(--pico-primary-inverse);
}

.nlweb-message-assistant .nlweb-message-content {
    background-color: var(--pico-card-background-color);
    border: var(--pico-border-width) solid var(--pico-muted-border-color);
}

/* Message text */
.nlweb-message-text {
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

/* Answer text in assistant messages */
.nlweb-answer-text {
    margin-top: var(--pico-spacing);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* First answer text (summary) should have no top margin */
.nlweb-message-content > .nlweb-answer-text:first-child {
    margin-top: 0;
}

/* Sites info */
.nlweb-sites-info {
    display: block;
    color: var(--pico-muted-color);
    font-size: 0.875rem;
    margin-bottom: calc(var(--pico-spacing) / 2);
}

/* Results Container */
.nlweb-results-container {
    display: flex;
    flex-direction: column;
    gap: calc(var(--pico-spacing) / 2);
    margin-top: calc(var(--pico-spacing) / 2);
}

/* Result Items - Using Pico's article styling */
.nlweb-result-item {
    padding: var(--pico-spacing);
    background-color: var(--pico-background-color);
    border: var(--pico-border-width) solid var(--pico-muted-border-color);
    border-radius: var(--pico-border-radius);
    margin: 0;
}

.nlweb-result-item h4 {
    margin: 0 0 calc(var(--pico-spacing) / 2) 0;
    font-size: 1rem;
}

.nlweb-result-item h4 a {
    color: var(--pico-primary);
    text-decoration: none;
}

.nlweb-result-item h4 a:hover {
    text-decoration: underline;
}

.nlweb-result-item p {
    margin: calc(var(--pico-spacing) / 2) 0;
    color: var(--pico-color);
    font-size: 0.875rem;
    line-height: 1.5;
}

.nlweb-result-item small {
    display: block;
    margin-top: calc(var(--pico-spacing) / 2);
}

.nlweb-result-item small a {
    color: var(--pico-muted-color);
    font-size: 0.8125rem;
    text-decoration: none;
}

.nlweb-result-item small a:hover {
    color: var(--pico-primary);
}

/* Loading Animation */
.nlweb-loading {
    display: flex;
    gap: calc(var(--pico-spacing) / 4);
    padding: var(--pico-spacing) 0;
}

.nlweb-loading span {
    width: 8px;
    height: 8px;
    background-color: var(--pico-muted-color);
    border-radius: 50%;
    animation: nlweb-loading-bounce 1.4s infinite ease-in-out both;
}

.nlweb-loading span:nth-child(1) {
    animation-delay: -0.32s;
}

.nlweb-loading span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes nlweb-loading-bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* Input Form */
.nlweb-chat-form {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: 0;
}

.nlweb-chat-input-wrapper {
    display: grid;
    grid-template-columns: 1fr auto;
    width: 100%;
    gap: calc(var(--pico-spacing) / 2);
    align-items: start;
}

.nlweb-chat-input {
    grid-column: 1;
    width: 100%;
    resize: vertical;
    min-height: 52px;
    max-height: 120px;
    overflow-y: auto;
    font-family: inherit;
    line-height: 1.5;
    margin: 0;
    padding: calc(var(--pico-form-element-spacing-vertical) * 0.5) var(--pico-form-element-spacing-horizontal);
}

.nlweb-chat-send {
    grid-column: 2;
    padding: calc(var(--pico-spacing) / 2) var(--pico-spacing);
    min-height: 52px;
    margin: 0;
    white-space: nowrap;
    align-self: start;
}

.nlweb-chat-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Error Messages */
.nlweb-error {
    padding: var(--pico-spacing);
    background-color: var(--pico-del-background-color);
    color: var(--pico-del-color);
    border-radius: var(--pico-border-radius);
    margin: var(--pico-spacing) 0;
}

/* No results message */
.nlweb-no-results {
    padding: var(--pico-spacing);
    color: var(--pico-muted-color);
    text-align: center;
    font-style: italic;
}

/* History Panel (Optional Feature) */
.nlweb-history-panel {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: calc(var(--pico-spacing) / 2);
    width: 300px;
    max-height: 400px;
    overflow-y: auto;
    background-color: var(--pico-card-background-color);
    border: var(--pico-border-width) solid var(--pico-muted-border-color);
    border-radius: var(--pico-border-radius);
    box-shadow: var(--pico-card-box-shadow);
    padding: var(--pico-spacing);
    z-index: 10;
}

.nlweb-history-panel.show {
    display: block;
}

.nlweb-history-item {
    padding: calc(var(--pico-spacing) / 2);
    margin-bottom: calc(var(--pico-spacing) / 4);
    border-radius: var(--pico-border-radius);
    cursor: pointer;
    transition: background-color 0.2s;
}

.nlweb-history-item:hover {
    background-color: var(--pico-muted-background-color);
}

.nlweb-history-item-title {
    font-size: 0.875rem;
    color: var(--pico-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nlweb-history-item-date {
    font-size: 0.75rem;
    color: var(--pico-muted-color);
    margin-top: calc(var(--pico-spacing) / 4);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nlweb-message-content {
        max-width: 95%;
    }

    .nlweb-chat-messages {
        max-height: 50vh;
    }

    .nlweb-history-panel {
        width: 100%;
        left: 0;
        right: 0;
    }
}

/* Dark mode optimizations (automatic via Pico variables) */
@media (prefers-color-scheme: dark) {
    .nlweb-chat-messages {
        border-color: var(--pico-muted-border-color);
    }
}