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

:root {
    --bg: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --text: #e0e0e0;
    --text-secondary: #888;
    --accent: #4ade80;
    --accent-dim: #22c55e;
    --user-bg: #1e3a5f;
    --assistant-bg: #1a1a1a;
    --border: #333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent);
}

.model-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.model-selector label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.model-selector select {
    background: var(--bg-tertiary);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    min-width: 180px;
}

.model-selector select:focus {
    outline: none;
    border-color: var(--accent);
}

.status {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.status.loading {
    background: #854d0e;
    color: #fef08a;
}

.status.ready {
    background: #14532d;
    color: #86efac;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.welcome-message {
    text-align: center;
    color: var(--text-secondary);
    margin: auto;
    padding: 2rem;
}

.message {
    max-width: 85%;
    padding: 0.875rem 1.25rem;
    border-radius: 12px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.message.user {
    background: var(--user-bg);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message.assistant {
    background: var(--bg-secondary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border);
}

.message.assistant .thinking {
    color: var(--text-secondary);
    font-style: italic;
}

.message code {
    background: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.875em;
}

.message pre {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5rem 0;
}

.message pre code {
    background: none;
    padding: 0;
}

.chat-input {
    display: flex;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.chat-input textarea {
    flex: 1;
    background: var(--bg-tertiary);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9375rem;
    resize: none;
    max-height: 150px;
    font-family: inherit;
}

.chat-input textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.chat-input textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-input button {
    background: var(--accent);
    color: #000;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.chat-input button:hover:not(:disabled) {
    background: var(--accent-dim);
}

.chat-input button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.chat-input button svg {
    width: 20px;
    height: 20px;
}

footer {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: var(--border);
    color: var(--text);
}

#stats {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* RAG Toggle */
.rag-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.rag-toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

.rag-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.rag-toggle input:checked + .rag-label {
    color: var(--accent);
}

/* RAG sources display */
.rag-sources {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: rgba(74, 222, 128, 0.1);
    border-radius: 6px;
    border-left: 2px solid var(--accent);
}

.rag-sources-label {
    font-weight: 500;
}

.rag-sources a {
    color: var(--accent);
    text-decoration: none;
}

.rag-sources a:hover {
    text-decoration: underline;
}

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

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #444;
}

/* Mobile */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }

    .model-selector {
        width: 100%;
    }

    .model-selector select {
        flex: 1;
    }

    .message {
        max-width: 95%;
    }
}

/* Memory status bar */
.memory-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    font-size: 0.8125rem;
}

.memory-icon {
    display: flex;
    align-items: center;
}

.memory-icon svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-secondary);
}

.memory-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.memory-label {
    color: var(--text-secondary);
}

.loaded-model {
    color: var(--text);
    font-weight: 500;
}

.loaded-model.active {
    color: var(--accent);
}

.loaded-model.none {
    color: var(--text-secondary);
    font-style: italic;
}

.unload-btn {
    background: transparent;
    border: 1px solid #ef4444;
    color: #ef4444;
    width: 26px;
    height: 26px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    margin-left: 0.5rem;
}

.unload-btn:hover {
    background: #ef4444;
    color: #fff;
}

.unload-btn.hidden {
    display: none;
}

.unload-btn svg {
    width: 14px;
    height: 14px;
}

.loading-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    color: #fbbf24;
}

.loading-indicator.hidden {
    display: none;
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid #fbbf24;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Typing indicator */
.typing::after {
    content: '▋';
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Thinking block */
.thinking-block {
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    color: #666;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    border-left: 2px solid #444;
}

.thinking-block summary {
    cursor: pointer;
    font-style: italic;
    color: #888;
    user-select: none;
    outline: none;
}

.thinking-block summary::-webkit-details-marker {
    color: #555;
}

.thinking-block[open] summary {
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #333;
}

.thinking-text {
    white-space: pre-wrap;
    line-height: 1.4;
    max-height: 200px;
    overflow-y: auto;
    color: #777;
}

.response-block {
    white-space: pre-wrap;
    line-height: 1.6;
}