:root {
    --brand: #1b6ec2;
    --brand-dark: #14538f;
    --ink: #1f2933;
    --ink-soft: #52606d;
    --line: #d9e2ec;
    --surface: #ffffff;
    --surface-alt: #f5f7fa;
    --error-bg: #fdecea;
    --error-ink: #a4262c;
    --xml-delim: #0000ff;
    --xml-tag: #800000;
    --xml-attr: #ff0000;
    --xml-value: #0000ff;
    --xml-comment: #008000;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    height: 100%;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    color: var(--ink);
    background: var(--surface-alt);
}

a {
    color: var(--brand);
}

h1 {
    font-size: 1.5rem;
    margin: 0 0 0.5rem;
}

h2 {
    font-size: 1.05rem;
    margin: 0;
}

h3 {
    font-size: 0.9rem;
    margin: 0 0 0.5rem;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.lede {
    color: var(--ink-soft);
    max-width: 60rem;
}

/* ---- shell ---- */

.app-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.app-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 0.6rem 1.25rem;
    background: #102a43;
    color: #f0f4f8;
    flex-shrink: 0;
}

.app-title {
    font-size: 1.05rem;
    white-space: nowrap;
}

.app-title .brand {
    font-weight: 700;
    color: #7cc4fa;
}

.app-nav {
    display: flex;
    gap: 1rem;
    flex-grow: 1;
}

.app-nav a {
    color: #bcccdc;
    text-decoration: none;
    padding: 0.35rem 0.6rem;
    border-radius: 4px;
}

.app-nav a:hover {
    color: #ffffff;
}

.app-nav a.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    font-size: 0.85rem;
}

.user-info .sign-out {
    color: #bcccdc;
}

.app-main {
    flex-grow: 1;
    overflow: auto;
    padding: 1.25rem;
}

.auth-message {
    padding: 2rem;
    text-align: center;
    color: var(--ink-soft);
}

/* ---- sign in chooser ---- */

.signin-chooser {
    max-width: 26rem;
    margin: 4rem auto 0;
    text-align: center;
}

.signin-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.signin-options .button {
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
}

/* ---- buttons ---- */

.button {
    display: inline-block;
    padding: 0.45rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: 5px;
    background: var(--surface);
    color: var(--ink);
    font-size: 0.85rem;
    text-decoration: none;
    cursor: pointer;
}

.button:hover:not(:disabled) {
    border-color: var(--brand);
    color: var(--brand);
}

.button.primary {
    background: var(--brand);
    border-color: var(--brand);
    color: #ffffff;
}

.button.primary:hover:not(:disabled) {
    background: var(--brand-dark);
    color: #ffffff;
}

.button.subtle {
    border-color: transparent;
    background: transparent;
    color: var(--ink-soft);
}

.button.danger {
    background: var(--error-ink, #b3261e);
    border-color: var(--error-ink, #b3261e);
    color: #ffffff;
}

.button.danger:hover:not(:disabled) {
    opacity: 0.85;
    color: #ffffff;
}

.button:disabled {
    opacity: 0.55;
    cursor: default;
}

/* ---- home: report cards ---- */

.report-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
}

.report-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.report-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.9rem;
    flex-grow: 1;
}

.report-card .button {
    align-self: flex-start;
}

.report-card.new-report {
    border-style: dashed;
    border-color: var(--brand);
}

.report-card.continue-report {
    border-color: var(--brand);
    border-width: 2px;
    background: var(--surface-accent, rgba(0, 0, 0, 0.02));
}

.saved-reports-heading {
    margin: 2rem 0 0;
    font-size: 1.2rem;
}

.saved-reports-status {
    margin-top: 0.75rem;
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.saved-reports-status.error {
    color: var(--danger, #b3261e);
}

/* ---- designer layout ---- */

.designer-grid {
    display: grid;
    grid-template-columns: minmax(20rem, 26rem) minmax(0, 1fr);
    gap: 1.25rem;
    height: 100%;
    min-height: 0;
}

.chat-pane,
.query-pane {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 0;
    overflow: auto;
}

.chat-pane {
    overflow: hidden;
}

.pane-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.pane-actions {
    display: flex;
    gap: 0.5rem;
}

/* ---- designer: save bar ---- */

.save-bar {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.save-name {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-grow: 1;
    min-width: 14rem;
}

.save-name span {
    font-size: 0.85rem;
    color: var(--ink-soft);
    white-space: nowrap;
}

.save-name input {
    flex-grow: 1;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    font: inherit;
    background: var(--surface);
    color: var(--ink);
}

.save-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--ink-soft);
    white-space: nowrap;
}

.save-location code {
    padding: 0.35rem 0.6rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface-alt);
    font-size: 0.85rem;
    user-select: all;
}

.save-status {
    font-size: 0.85rem;
    color: var(--ink-soft);
}

.save-status.error {
    color: var(--danger, #b3261e);
}

/* ---- chat panel ---- */

.chat-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    height: 100%;
    min-height: 0;
}

.chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-right: 0.25rem;
    min-height: 0;
}

.chat-empty {
    color: var(--ink-soft);
    font-size: 0.9rem;
    background: var(--surface-alt);
    border-radius: 8px;
    padding: 0.9rem 1.1rem;
}

.chat-message {
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
    max-width: 100%;
    overflow-wrap: break-word;
}

.chat-message.user {
    background: #e3f0fc;
    align-self: flex-end;
}

.chat-message.assistant {
    background: var(--surface-alt);
    align-self: flex-start;
}

.chat-message.system {
    background: var(--error-bg);
    color: var(--error-ink);
}

.chat-message.busy {
    color: var(--ink-soft);
    font-style: italic;
}

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

.spinner {
    width: 0.9rem;
    height: 0.9rem;
    flex-shrink: 0;
    border: 2px solid var(--line);
    border-top-color: var(--brand);
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

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

.busy-activity {
    list-style: none;
    margin: 0.5rem 0 0;
    padding: 0;
    font-size: 0.8rem;
}

.busy-activity li {
    padding: 0.1rem 0;
}

.busy-activity li.done::before {
    content: "✓ ";
    color: var(--brand);
    font-style: normal;
}

.busy-activity li.current::before {
    content: "… ";
    color: var(--ink-soft);
}

.busy-activity li.current {
    animation: activity-pulse 1.4s ease-in-out infinite;
}

@keyframes activity-pulse {
    0%, 100% {
        opacity: 1;
    }

    50% {
        opacity: 0.45;
    }
}

.chat-role {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-soft);
    margin-bottom: 0.25rem;
}

.chat-text p {
    margin: 0 0 0.5rem;
}

.chat-text p:last-child {
    margin-bottom: 0;
}

.chat-text pre {
    background: #102a43;
    color: #d9e2ec;
    padding: 0.6rem;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.78rem;
}

.chat-text code {
    font-family: Consolas, "Cascadia Mono", monospace;
    font-size: 0.85em;
}

.chat-input {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
    flex-shrink: 0;
}

.chat-input textarea {
    flex-grow: 1;
    resize: vertical;
    min-height: 3.2rem;
    max-height: 10rem;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.9rem;
}

/* ---- query pane ---- */

/* The report pane dims while the AI agent is working; its controls are individually disabled so
   results stay readable/scrollable throughout. */
.query-pane.assistant-busy {
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.variables-editor {
    background: var(--surface-alt);
    border-radius: 8px;
    padding: 0.75rem 0.9rem;
}

.variables-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
    gap: 0.6rem;
}

.variable-field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--ink-soft);
}

.variable-field input {
    padding: 0.4rem 0.55rem;
    border: 1px solid var(--line);
    border-radius: 5px;
    font-size: 0.85rem;
}

.query-editor {
    width: 100%;
    min-height: 16rem;
    resize: vertical;
    padding: 0.7rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    font-family: Consolas, "Cascadia Mono", monospace;
    font-size: 0.8rem;
    line-height: 1.45;
    white-space: pre;
    flex-shrink: 0;
}

/* ---- XML syntax colouring (Visual Studio style palette) ---- */

.xml-delim { color: var(--xml-delim); }
.xml-tag { color: var(--xml-tag); }
.xml-attr { color: var(--xml-attr); }
.xml-value { color: var(--xml-value); }
.xml-comment { color: var(--xml-comment); }

.query-editor-shell {
    position: relative;
    display: flex;
    flex-shrink: 0;
}

.query-editor-shell .query-editor {
    position: relative;
    flex: 1;
}

.query-editor-backdrop {
    position: absolute;
    inset: 0;
    margin: 0;
    overflow: hidden;
    pointer-events: none;
    background: var(--surface);
    border: 1px solid transparent;
    border-radius: 6px;
    /* Metrics below must mirror .query-editor exactly so the coloured glyphs sit under the caret. */
    padding: 0.7rem;
    font-family: Consolas, "Cascadia Mono", monospace;
    font-size: 0.8rem;
    line-height: 1.45;
    white-space: pre;
}

/* Applied by site.js once the backdrop is live: the textarea keeps the caret, selection and input
   behaviour while the backdrop supplies the visible (coloured) text. Without JS the textarea
   simply remains plainly readable. */
.query-editor-shell.highlight-active .query-editor {
    background: transparent;
    color: transparent;
    caret-color: var(--ink);
}

.query-editor-shell.highlight-active .query-editor::placeholder {
    color: var(--ink-soft);
}

/* ---- RQL expando (query pane and chat transcript) ---- */

.rql-expando {
    border: 1px solid var(--line);
    border-radius: 6px;
    flex-shrink: 0;
}

.rql-expando > summary {
    cursor: pointer;
    padding: 0.55rem 0.8rem;
    font-size: 0.85rem;
    color: var(--ink-soft);
    user-select: none;
    list-style: revert;
}

.rql-expando > summary:hover {
    color: var(--brand);
}

.rql-expando[open] > summary {
    border-bottom: 1px solid var(--line);
}

.query-expando {
    display: flex;
    flex-direction: column;
}

.query-expando .query-editor,
.query-expando .query-editor-backdrop {
    border: none;
    border-radius: 0 0 6px 6px;
}

.chat-text .rql-expando {
    margin: 0.5rem 0;
    background: var(--surface);
}

.chat-text .rql-expando > summary {
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* RQL blocks are syntax coloured on a light surface (unlike generic chat code blocks, which stay
   on the dark panel) so the shared Visual Studio style palette reads correctly. */
.chat-text .rql-expando pre {
    margin: 0;
    border-radius: 0 0 6px 6px;
    background: var(--surface);
    color: var(--ink);
}

.mode-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--ink-soft);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.mode-toggle input {
    accent-color: var(--brand);
    cursor: pointer;
}

.standard-placeholder {
    border: 1px dashed var(--line);
    border-radius: 6px;
    padding: 1.5rem 1rem;
    color: var(--ink-soft);
    font-size: 0.9rem;
    text-align: center;
    flex-shrink: 0;
}

.standard-placeholder.ready {
    border-style: solid;
    border-color: var(--brand);
}

.banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.7rem 0.9rem;
    border-radius: 6px;
    font-size: 0.88rem;
}

.banner.error {
    background: var(--error-bg);
    color: var(--error-ink);
}

.banner-text {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

/* ---- results ---- */

.results-section {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.results-meta {
    font-size: 0.8rem;
    color: var(--ink-soft);
}

.results-note {
    font-size: 0.88rem;
    color: var(--ink-soft);
    margin: 0;
}

.results-scroll {
    overflow: auto;
    max-height: 32rem;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.results-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.85rem;
}

.results-table th,
.results-table td {
    padding: 0.45rem 0.7rem;
    border-bottom: 1px solid var(--line);
    text-align: left;
    white-space: nowrap;
}

.results-table thead th {
    position: sticky;
    top: 0;
    background: var(--surface-alt);
    z-index: 1;
}

.results-table tbody tr:hover {
    background: #f0f7ff;
}

.results-table tfoot td {
    position: sticky;
    bottom: 0;
    background: var(--surface-alt);
    font-weight: 600;
    border-top: 2px solid var(--line);
}

.raw-xml {
    background: var(--surface);
    color: var(--ink);
    border: 1px solid var(--line);
    padding: 0.8rem;
    border-radius: 6px;
    overflow: auto;
    max-height: 32rem;
    font-size: 0.78rem;
    font-family: Consolas, "Cascadia Mono", monospace;
}

@media (max-width: 70rem) {
    .designer-grid {
        grid-template-columns: 1fr;
        height: auto;
    }

    .chat-pane {
        max-height: 34rem;
    }
}