/* ═══════════════════════════════════════════════════════════════
   RAG Agent — Dark Mode Glassmorphism Chat UI
   ═══════════════════════════════════════════════════════════════ */

/* ── Auth Modal ────────────────────────────────────────────────── */
.auth-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.95);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease;
}

.auth-box {
    width: 100%;
    max-width: 360px;
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.auth-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: var(--shadow-glow);
}

.auth-box h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.auth-box p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
    line-height: 1.5;
}

.auth-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 16px; /* Prevent zoom on mobile */
    margin-bottom: 12px;
    outline: none;
    transition: var(--transition);
}

.auth-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.auth-btn {
    width: 100%;
    padding: 12px;
    font-size: 14px;
}

.auth-error {
    color: var(--error);
    font-size: 13px;
    margin-top: 12px;
    min-height: 20px;
}

/* ── Reset & Base ──────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a28;
    --bg-glass: rgba(26, 26, 40, 0.7);
    --bg-glass-hover: rgba(36, 36, 56, 0.8);
    --surface: rgba(255, 255, 255, 0.04);
    --surface-hover: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(124, 131, 255, 0.5);

    --text-primary: #e8e8f0;
    --text-secondary: #9898b0;
    --text-muted: #65657a;
    --text-inverse: #0a0a0f;

    --accent: #7c83ff;
    --accent-dim: rgba(124, 131, 255, 0.15);
    --accent-glow: rgba(124, 131, 255, 0.3);
    --success: #4ade80;
    --warning: #f59e0b;
    --error: #ef4444;

    --user-bubble: linear-gradient(135deg, #7c83ff 0%, #6366f1 100%);
    --assistant-bubble: var(--bg-glass);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--accent-glow);

    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html, body {
    height: 100%;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow: hidden;
}

/* ── App Layout ────────────────────────────────────────────────── */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
}

/* ── Header ────────────────────────────────────────────────────── */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
    background: rgba(10, 10, 15, 0.85);
    z-index: 10;
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-dim);
    border-radius: var(--radius-md);
    color: var(--accent);
}

.header-title h1 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.header-subtitle {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: 4px;
}

.icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.icon-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    border-color: var(--border);
}

/* ── Chat Area ─────────────────────────────────────────────────── */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    scroll-behavior: smooth;
}

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

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

.chat-area::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ── Welcome Screen ────────────────────────────────────────────── */
.welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px 40px;
    animation: fadeIn 0.5s ease;
}

.welcome-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-dim);
    border-radius: 24px;
    color: var(--accent);
    margin-bottom: 24px;
    box-shadow: var(--shadow-glow);
}

.welcome h2 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.welcome p {
    color: var(--text-secondary);
    max-width: 400px;
    margin-bottom: 32px;
    font-size: 14px;
}

.example-queries {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    max-width: 480px;
    width: 100%;
}

.example-query {
    padding: 12px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    line-height: 1.4;
}

.example-query:hover {
    background: var(--surface-hover);
    border-color: var(--accent-dim);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* ── Messages ──────────────────────────────────────────────────── */
.message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    animation: slideIn 0.3s ease;
}

.message-user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 2px;
}

.message-user .message-avatar {
    background: var(--user-bubble);
    color: white;
}

.message-assistant .message-avatar {
    background: var(--accent-dim);
    color: var(--accent);
}

.message-content {
    max-width: 75%;
    min-width: 80px;
}

.message-bubble {
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    line-height: 1.65;
    word-wrap: break-word;
    overflow-wrap: break-word;
    overflow-x: auto;
}

.message-bubble.reveal {
    animation: revealIn 0.4s ease;
}

.message-user .message-bubble {
    background: var(--user-bubble);
    color: white;
    border-bottom-right-radius: 4px;
}

.message-assistant .message-bubble {
    background: var(--assistant-bubble);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-bottom-left-radius: 4px;
}

/* Markdown in assistant bubbles */
.message-assistant .message-bubble h1,
.message-assistant .message-bubble h2,
.message-assistant .message-bubble h3 {
    margin-top: 12px;
    margin-bottom: 6px;
    font-weight: 600;
}

.message-assistant .message-bubble h1 { font-size: 16px; }
.message-assistant .message-bubble h2 { font-size: 15px; }
.message-assistant .message-bubble h3 { font-size: 14px; color: var(--accent); }

.message-assistant .message-bubble p {
    margin-bottom: 8px;
}

.message-assistant .message-bubble p:last-child {
    margin-bottom: 0;
}

.message-assistant .message-bubble ul,
.message-assistant .message-bubble ol {
    margin: 8px 0;
    padding-left: 20px;
}

.message-assistant .message-bubble li {
    margin-bottom: 4px;
}

.message-assistant .message-bubble code {
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    font-size: 13px;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.message-assistant .message-bubble pre {
    padding: 12px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 8px 0;
}

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

.message-assistant .message-bubble strong {
    color: var(--accent);
    font-weight: 600;
}

.message-assistant .message-bubble blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 12px;
    margin: 8px 0;
    color: var(--text-secondary);
}

/* Tables inside assistant messages */
.message-assistant .message-bubble table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 13px;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

.message-assistant .message-bubble thead {
    display: table;
    width: 100%;
    table-layout: fixed;
}

.message-assistant .message-bubble tbody {
    display: table;
    width: 100%;
    table-layout: fixed;
}

.message-assistant .message-bubble th {
    background: var(--accent-dim);
    color: var(--accent);
    font-weight: 600;
    text-align: left;
    padding: 10px 14px;
    border: 1px solid var(--border);
    white-space: normal;
}

.message-assistant .message-bubble td {
    padding: 9px 14px;
    border: 1px solid var(--border);
    color: var(--text-primary);
    white-space: normal;
}

.message-assistant .message-bubble tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.03);
}

.message-assistant .message-bubble tr:nth-child(odd) {
    background: rgba(0, 0, 0, 0.15);
}

.message-assistant .message-bubble tr:hover {
    background: rgba(124, 131, 255, 0.08);
}

/* Token usage badge */
.token-usage {
    margin-top: 8px;
    font-size: 11px;
    color: var(--text-muted);
    font-family: 'SF Mono', 'Fira Code', monospace;
    padding: 4px 0;
}

/* Thinking indicator */
.thinking-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
}

.thinking-dots {
    display: flex;
    gap: 4px;
}

.thinking-label {
    color: var(--text-secondary);
    font-size: 13px;
    font-style: italic;
}

.thinking-elapsed {
    color: var(--text-muted);
    font-size: 12px;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

/* ── Sources badge ─────────────────────────────────────────────── */
.sources-container {
    margin-top: 10px;
}

.sources-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.sources-toggle:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.sources-toggle svg {
    transition: var(--transition);
}

.sources-toggle.open svg {
    transform: rotate(180deg);
}

.sources-list {
    display: none;
    margin-top: 8px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.sources-list.open {
    display: block;
    animation: fadeIn 0.2s ease;
}

.source-item {
    padding: 4px 0;
    font-size: 12px;
    color: var(--text-secondary);
}

.source-item:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding-bottom: 6px;
    margin-bottom: 4px;
}

.source-header {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 2px 0;
    transition: var(--transition);
    border-radius: 4px;
}

.source-header:hover {
    background: rgba(255, 255, 255, 0.04);
}

.source-chevron {
    flex-shrink: 0;
    transition: var(--transition);
    transform: rotate(0deg);
    margin-top: 2px;
}

.source-item.expanded .source-chevron {
    transform: rotate(90deg);
}

.source-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.source-text {
    display: none;
    margin: 6px 0 4px 20px;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    border-left: 2px solid var(--accent-dim);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 11px;
    line-height: 1.6;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 200px;
    overflow-y: auto;
}

.source-item.expanded .source-text {
    display: block;
    animation: fadeIn 0.2s ease;
}

.source-badge {
    padding: 2px 6px;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    white-space: nowrap;
}

.source-score {
    color: var(--text-muted);
    font-size: 11px;
    white-space: nowrap;
    margin-left: auto;
}

/* ── Typing indicator ──────────────────────────────────────────── */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 4px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* ── Input Area ────────────────────────────────────────────────── */
.input-area {
    padding: 12px 20px 16px;
    border-top: 1px solid var(--border);
    backdrop-filter: blur(20px);
    background: rgba(10, 10, 15, 0.85);
    flex-shrink: 0;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 6px 6px 6px 16px;
    transition: var(--transition);
}

.input-container:focus-within {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    padding: 8px 0;
    max-height: 150px;
    min-height: 21px;
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.send-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
    background: #6b71ff;
    transform: scale(1.05);
}

.send-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.input-hint {
    text-align: center;
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 8px;
}

/* ── Sidebar ───────────────────────────────────────────────────── */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-slow);
}

.sidebar-overlay.open {
    opacity: 1;
    visibility: visible;
}

.sidebar {
    position: fixed;
    top: 0;
    right: -420px;
    width: 400px;
    max-width: 90vw;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition-slow);
    box-shadow: var(--shadow-lg);
}

.sidebar.open {
    right: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-header h2 {
    font-size: 15px;
    font-weight: 600;
}

.sidebar-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.sidebar-close:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.sidebar-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}

.system-prompt-input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
    padding: 14px;
    resize: none;
    outline: none;
    transition: var(--transition);
}

.system-prompt-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.sidebar-actions {
    display: flex;
    gap: 8px;
    margin-top: 14px;
    flex-shrink: 0;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    background: #6b71ff;
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

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

.save-status {
    margin-top: 10px;
    font-size: 12px;
    text-align: center;
    min-height: 18px;
    flex-shrink: 0;
}

.save-status.success {
    color: var(--success);
}

.save-status.error {
    color: var(--error);
}

/* ── Temperature Control ──────────────────────────────────────── */
.temperature-control {
    margin-top: 14px;
    padding: 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.temp-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.temp-header label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.temp-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.temp-slider {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.temp-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 8px var(--accent-glow);
    transition: var(--transition);
}

.temp-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.temp-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px var(--accent-glow);
}

.temp-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 4px;
    font-size: 10px;
    color: var(--text-muted);
}

/* ── Animations ────────────────────────────────────────────────── */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes typing {
    0%, 60%, 100% { opacity: 0.3; transform: scale(0.8); }
    30% { opacity: 1; transform: scale(1); }
}

@keyframes revealIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .app {
        max-width: 100%;
    }

    .example-queries {
        grid-template-columns: 1fr;
    }

    .message-content {
        max-width: 85%;
    }

    .header-subtitle {
        display: none;
    }
}