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

:root {
    --bg-primary: #f6f6f6;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eef0f2;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --text-muted: #8a8a9a;
    --accent: #00ab8f;
    --accent-hover: #009179;
    --accent-light: rgba(0, 171, 143, 0.07);
    --accent-glow: rgba(0, 171, 143, 0.18);
    --primary: #bed02e;
    --primary-dark: #a8ba28;
    --primary-light: rgba(190, 208, 46, 0.12);
    --border: #dfe0e3;
    --border-light: #ecedef;
    --user-bubble: #00ab8f;
    --agent-bubble: #ffffff;
    --thinking-bg: #f7f8fa;
    --thinking-border: #e4e5e9;
    --error-bg: #fef2f2;
    --error-text: #dc2626;
    --error-border: #fecaca;
    --table-header-bg: #00ab8f;
    --table-header-text: #ffffff;
    --table-row-alt: #f8faf8;
    --table-hover: rgba(0, 171, 143, 0.05);
    --sql-bg: #f4f5f7;
    --sql-border: #e2e3e7;
    --radius: 14px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 4px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============================================
   APP LAYOUT
   ============================================ */

.app {
    display: flex;
    flex-direction: column;
    height: 100dvh;
    max-width: 1040px;
    margin: 0 auto;
    position: relative;
    background: var(--bg-primary);
    overflow: hidden;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 56px;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--primary);
    flex-shrink: 0;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.logo-mark {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

.logo {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    letter-spacing: -0.02em;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

/* Select */
.select-wrapper {
    position: relative;
    min-width: 0;
}

#agent-select {
    appearance: none;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid transparent;
    border-radius: var(--radius-xs);
    padding: 7px 32px 7px 10px;
    font-size: 0.8125rem;
    font-family: var(--font-body);
    font-weight: 500;
    min-width: 180px;
    max-width: 260px;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a8a9a' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

#agent-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
}

#agent-select:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* Buttons */
.btn-icon {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    padding: 7px;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
    border-color: var(--accent);
}

.btn {
    border: none;
    border-radius: var(--radius-xs);
    padding: 7px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

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

.btn-secondary:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-send {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-xs);
    padding: 8px 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.btn-send:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-send:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ============================================
   AUTH: LOGIN SCREEN + USER CHIP
   ============================================ */

.hidden { display: none !important; }

.login-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.login-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 36px 32px 28px;
    width: 100%;
    max-width: 380px;
    text-align: center;
}

.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.login-logo h1 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 22px;
    line-height: 1.5;
}

.btn-google {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-xs);
    padding: 11px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-google:hover {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: 0 1px 4px var(--accent-glow);
}

.btn-google svg { flex-shrink: 0; }

.login-hint {
    margin-top: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.login-hint code {
    background: var(--bg-tertiary);
    padding: 1px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--text-secondary);
}

/* User chip in header */
.user-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px 4px 4px;
    background: var(--bg-tertiary);
    border: 1px solid transparent;
    border-radius: 20px;
    transition: border-color var(--transition-fast);
    max-width: 200px;
}

.user-chip:hover { border-color: var(--border); }

.user-chip img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--border-light);
    flex-shrink: 0;
}

.user-chip span {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-chip .btn-icon {
    padding: 4px;
    border: none;
    background: transparent;
}

.user-chip .btn-icon:hover {
    background: var(--bg-secondary);
    border: none;
}

@media (max-width: 768px) {
    .user-chip span { display: none; }
    .user-chip { padding: 4px; }
    .login-card { padding: 28px 22px 22px; }
}

/* ============================================
   HISTORY PANEL
   ============================================ */

.history-panel {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 300px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    transform: translateX(-100%);
    transition: transform var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.history-panel.open {
    transform: translateX(0);
}

.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 2px solid var(--primary);
    flex-shrink: 0;
}

.history-header h2 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 6px;
}

.history-empty {
    text-align: center;
    padding: 40px 16px;
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.history-item {
    padding: 10px 12px;
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    margin-bottom: 2px;
}

.history-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--border);
}

.history-item.active {
    background: var(--accent-light);
    border-color: var(--accent);
}

.history-item-agent {
    font-size: 0.65rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item-preview {
    font-size: 0.8125rem;
    color: var(--text-primary);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.history-item-date {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 3px;
}

.history-backdrop {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.12);
    z-index: 99;
    backdrop-filter: blur(2px);
}

.history-backdrop.visible {
    display: block;
}

/* ============================================
   CHAT AREA
   ============================================ */

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 5px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Welcome */
.welcome-message {
    text-align: center;
    padding: 80px 24px 40px;
    color: var(--text-secondary);
    animation: fadeIn 0.4s ease;
}

.welcome-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--accent-light);
    color: var(--accent);
    margin-bottom: 16px;
}

.welcome-message h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.welcome-message p {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* ============================================
   CHAT LOADER
   ============================================ */

.chat-loader {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.chat-loader.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(8px);
}

.loader-content {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 8px 18px;
    box-shadow: var(--shadow-md);
}

.loader-pulse {
    display: flex;
    gap: 3px;
    align-items: center;
}

.loader-pulse span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: loaderPulse 1.2s ease-in-out infinite;
}

.loader-pulse span:nth-child(2) { animation-delay: 0.15s; }
.loader-pulse span:nth-child(3) { animation-delay: 0.3s; }

@keyframes loaderPulse {
    0%, 100% { transform: scale(0.7); opacity: 0.4; }
    50% { transform: scale(1); opacity: 1; }
}

.loader-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============================================
   MESSAGES
   ============================================ */

.message {
    max-width: 82%;
    animation: msgSlideIn 0.2s ease;
}

@keyframes msgSlideIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* User bubble */
.message-user {
    align-self: flex-end;
    background: var(--user-bubble);
    color: white;
    padding: 10px 16px;
    border-radius: var(--radius) var(--radius) 4px var(--radius);
    font-size: 0.9rem;
    word-break: break-word;
    box-shadow: var(--shadow-sm);
    line-height: 1.55;
}

/* Agent container */
.message-agent {
    align-self: flex-start;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 88%;
}

/* Thinking */
.message-thinking {
    background: var(--thinking-bg);
    border: 1px solid var(--thinking-border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
    overflow: hidden;
}

.thinking-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    cursor: pointer;
    user-select: none;
}

.thinking-header:hover { background: rgba(0,0,0,0.015); }

.thinking-icon {
    font-size: 0.6rem;
    transition: transform 0.2s;
    color: var(--text-muted);
}

.thinking-icon.expanded { transform: rotate(90deg); }

.thinking-label {
    color: var(--text-muted);
    font-weight: 500;
    font-style: italic;
    font-size: 0.75rem;
}

.thinking-content {
    padding: 0 12px 10px;
    white-space: pre-wrap;
    display: none;
    font-style: italic;
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 0.8rem;
}

.thinking-content.visible { display: block; }

/* SQL panel */
.message-sql {
    background: var(--sql-bg);
    border: 1px solid var(--sql-border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    overflow: hidden;
}

.sql-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    cursor: pointer;
    user-select: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.75rem;
}

.sql-header:hover { background: rgba(0,0,0,0.015); }

.sql-icon {
    font-size: 0.6rem;
    transition: transform 0.2s;
    color: var(--text-muted);
}

.sql-icon.expanded { transform: rotate(90deg); }

.sql-content { display: none; padding: 0 10px 10px; }
.sql-content.visible { display: block; }

.sql-content pre {
    background: #1e1f2e;
    color: #cdd6f4;
    padding: 12px 14px;
    border-radius: var(--radius-xs);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.7;
    white-space: pre;
    tab-size: 2;
}

.sql-content pre .sql-keyword { color: #cba6f7; font-weight: 600; }
.sql-content pre .sql-function { color: #89b4fa; }
.sql-content pre .sql-string { color: #a6e3a1; }
.sql-content pre .sql-number { color: #fab387; }
.sql-content pre .sql-comment { color: #6c7086; font-style: italic; }

/* Progress */
.message-progress {
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.progress-spinner {
    width: 13px;
    height: 13px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* Text / FINAL_RESPONSE */
.message-text {
    background: var(--agent-bubble);
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    line-height: 1.7;
    word-break: break-word;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.message-text h1, .message-text h2, .message-text h3 {
    margin-top: 10px;
    margin-bottom: 4px;
    color: var(--text-primary);
    line-height: 1.35;
}

.message-text h3 { font-size: 0.95rem; }
.message-text ul, .message-text ol { padding-left: 18px; margin: 4px 0; }
.message-text li { margin-bottom: 3px; }
.message-text p { margin: 4px 0; }
.message-text strong { color: var(--text-primary); font-weight: 600; }

.message-text code {
    background: var(--bg-tertiary);
    padding: 1px 5px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.82em;
}

.message-text pre {
    background: #1e1f2e;
    color: #cdd6f4;
    padding: 12px 14px;
    border-radius: var(--radius-xs);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.6;
    margin: 6px 0;
}

.message-text pre code {
    background: none;
    padding: 0;
    font-size: inherit;
    color: inherit;
}

.message-text a { color: var(--accent); text-decoration: none; }
.message-text a:hover { text-decoration: underline; }

/* Data results */
.message-data-result {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Tables */
.message-table {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
    max-height: 360px;
}

.message-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.message-table th {
    background: var(--table-header-bg);
    color: var(--table-header-text);
    padding: 9px 12px;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    top: 0;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    z-index: 1;
}

.message-table td {
    padding: 7px 12px;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.message-table td.cell-currency {
    text-align: right;
    font-weight: 500;
    color: var(--text-primary);
    font-family: var(--font-body);
}

.message-table th.col-currency {
    text-align: right;
}

.message-table tr:nth-child(even) { background: var(--table-row-alt); }
.message-table tr:hover { background: var(--table-hover); }

/* Charts */
.message-chart {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-chart .vega-embed { width: 100%; }
.message-chart .vega-embed summary { display: none; }

/* Error */
.message-error {
    background: var(--error-bg);
    color: var(--error-text);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    border: 1px solid var(--error-border);
}

/* Suggestions */
.message-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-top: 2px;
}

.suggestions-label {
    width: 100%;
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 2px;
}

.suggestion-chip {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 5px 13px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
    font-family: var(--font-body);
}

.suggestion-chip:hover {
    border-color: var(--accent);
    background: var(--accent-light);
    color: var(--accent);
}

/* ============================================
   INPUT AREA
   ============================================ */

.chat-input-area {
    padding: 10px 20px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    flex-shrink: 0;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--bg-primary);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 6px 6px 6px 14px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font-body);
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 120px;
    padding: 5px 0;
}

#message-input::placeholder { color: var(--text-muted); }
#message-input:disabled { opacity: 0.45; }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .app { max-width: 100%; }

    .header {
        padding: 0 12px;
        height: 52px;
        gap: 8px;
    }

    .logo { font-size: 0.95rem; }
    .logo-mark { display: none; }

    .btn-label { display: none; }

    .btn-secondary { padding: 7px 8px; }

    #agent-select {
        min-width: 120px;
        max-width: 160px;
        font-size: 0.75rem;
        padding: 6px 28px 6px 8px;
    }

    .chat-messages { padding: 14px 12px 10px; gap: 10px; }

    .message { max-width: 92%; }
    .message-agent { max-width: 95%; }

    .chat-input-area { padding: 8px 12px 12px; }

    .history-panel { width: 85vw; max-width: 320px; }

    .welcome-message { padding: 50px 16px 30px; }
    .welcome-message h2 { font-size: 1.2rem; }

    .chat-loader { bottom: 68px; }
}

@media (max-width: 420px) {
    .header-left .logo-group { display: none; }

    #agent-select { min-width: 100px; max-width: 140px; }

    .message-table { font-size: 0.7rem; }
    .message-table th, .message-table td { padding: 6px 8px; }
}