:root {
    /* SmarTax design system: cool-gray surfaces, restrained indigo accent. */
    --background: #F8F9FC;
    --bg: #F8F9FC;
    --workspace: #FAFBFD;
    --sidebar: #FBFCFE;
    --surface: #FFFFFF;
    --surface-2: #F5F6FA;
    --surface-3: #F1F3F8;
    --surface-hover: #F1F3F8;
    --text: #292B31;
    --text-2: #6F737D;
    --text-3: #747A86;
    --border: #E9EBF2;
    --border-strong: #DEE1EA;
    --brand: #6366E8;
    --brand-strong: #5558DD;
    --brand-soft: #EEF0FF;
    --brand-hover: #E7E9FF;
    --brand-subtle: #F5F5FF;
    --success: #5F806D;
    --success-soft: rgba(95, 128, 109, 0.12);
    --warning: #A17B48;
    --warning-soft: rgba(161, 123, 72, 0.12);
    --risk: #A45C5C;
    --risk-soft: rgba(164, 92, 92, 0.12);
    --info: #6577A5;
    --info-soft: rgba(101, 119, 165, 0.12);
    --shadow: 0 4px 24px rgba(30, 35, 55, 0.05);
    --radius-xl: 18px;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --font: 'Inter', 'Be Vietnam Pro', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body.dark-theme {
    --background: #101216;
    --bg: #101216;
    --workspace: #14161B;
    --sidebar: #15171C;
    --surface: #191C22;
    --surface-2: #1F232A;
    --surface-3: #262A32;
    --surface-hover: #262A32;
    --text: #F4F5F7;
    --text-2: #A5A9B4;
    --text-3: #939AA8;
    --border: #343A46;
    --border-strong: #454C5A;
    --brand: #7C7FF0;
    --brand-strong: #8C8EF5;
    --brand-soft: rgba(124, 127, 240, 0.14);
    --brand-hover: rgba(124, 127, 240, 0.22);
    --brand-subtle: rgba(124, 127, 240, 0.09);
    --success: #7FA98F;
    --success-soft: rgba(127, 169, 143, 0.16);
    --warning: #C09A63;
    --warning-soft: rgba(192, 154, 99, 0.16);
    --risk: #C07B7B;
    --risk-soft: rgba(192, 123, 123, 0.16);
    --info: #8B9BC4;
    --info-soft: rgba(139, 155, 196, 0.16);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(circle at 12% 8%, rgba(99, 102, 232, 0.055), transparent 30rem),
        linear-gradient(180deg, var(--bg), var(--bg));
}
button, textarea, select, input { font: inherit; }
a { color: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.skip-link {
    position: fixed;
    left: 16px;
    top: 12px;
    transform: translateY(-180%);
    z-index: 300;
    padding: .65rem .9rem;
    border-radius: 999px;
    background: var(--text);
    color: var(--bg);
    text-decoration: none;
    font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }

.workspace-shell {
    min-height: 100dvh;
    display: grid;
    grid-template-columns: 286px minmax(0, 1fr);
}

.sidebar-backdrop { display: none; }

.workspace-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.2rem;
    border-right: 1px solid var(--border);
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    backdrop-filter: blur(18px);
    overflow-y: auto;
    z-index: 80;
}

.sidebar-brand-row { padding: .15rem .2rem .5rem; }
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    min-height: 44px;
    text-decoration: none;
}
.brand-logo-mark { width: auto; height: 34px; display: block; }
.brand-logo-wordmark { font-size: 1.35rem; font-weight: 700; letter-spacing: -.04em; }

.new-check-btn {
    display: flex;
    align-items: center;
    gap: .7rem;
    width: 100%;
    min-height: 48px;
    padding: .7rem .85rem;
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    color: var(--text);
    background: var(--surface-2);
    cursor: pointer;
    font-weight: 650;
    text-align: left;
}
.new-check-btn:hover { border-color: var(--border-strong); background: var(--surface-hover); }
.new-check-icon { flex: 0 0 16px; width: 16px; height: 16px; color: var(--brand); }
.new-check-icon svg { display: block; width: 16px; height: 16px; }

.sidebar-section { display: grid; gap: .5rem; }
.sidebar-section--bottom { margin-top: auto; }
.sidebar-label {
    margin: .7rem .25rem .3rem;
    color: var(--text-3);
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .11em;
    text-transform: uppercase;
}
.sidebar-action {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 11px;
    height: 42px;
    padding: 0 14px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--text-2);
    text-decoration: none;
    text-align: left;
    cursor: pointer;
}
.sidebar-action:hover { background: var(--surface-hover); color: var(--text); }
/* Icons are 16px line glyphs inheriting colour; no decorative square container. */
.sidebar-action-icon { flex: 0 0 16px; width: 16px; height: 16px; color: inherit; }
.sidebar-action-icon svg { display: block; width: 16px; height: 16px; }
.sidebar-action strong { font-size: 14px; font-weight: 550; line-height: 1.2; color: inherit; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-action.is-active { background: var(--brand-soft); color: var(--brand-strong); }
.sidebar-action.is-active .sidebar-action-icon { color: var(--brand-strong); }

.sidebar-link { padding: .55rem .35rem; color: var(--text-2); text-decoration: none; font-size: .84rem; font-weight: 600; }
.sidebar-link:hover { color: var(--text); }
.sidebar-link--button { width: 100%; border: 0; background: transparent; text-align: left; cursor: pointer; }

@media (max-width: 680px) {
    .sidebar-action { height: 44px; padding: 0 12px; }
}
.fail-closed-card {
    display: grid;
    grid-template-columns: 8px 1fr;
    gap: .55rem;
    padding: .6rem .7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-2);
}
.fail-closed-dot { width: 7px; height: 7px; margin-top: .4rem; border-radius: 50%; background: var(--success); }
.fail-closed-card strong { display: block; color: var(--text-2); font-size: .72rem; font-weight: 600; }
.fail-closed-card p { margin: .15rem 0 0; color: var(--text-3); font-size: .68rem; line-height: 1.45; }

.workspace-main {
    min-width: 0;
    min-height: 100dvh;
    background: radial-gradient(circle at 50% 9%, color-mix(in srgb, var(--brand) 7%, transparent), transparent 36rem);
}
body.dark-theme .workspace-main { background: radial-gradient(circle at 50% 9%, color-mix(in srgb, var(--brand) 8%, transparent), transparent 36rem); }
.workspace-topbar {
    position: sticky;
    top: 0;
    z-index: 60;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .9rem clamp(1rem, 3vw, 2.4rem);
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(18px);
}
.topbar-left { display: flex; align-items: center; gap: .8rem; }
.workspace-kicker { margin: 0 0 .15rem; color: var(--text-3); font-size: .67rem; letter-spacing: .11em; text-transform: uppercase; font-weight: 700; }
.workspace-topbar h1 { margin: 0; font-size: 1.02rem; letter-spacing: -.025em; }
.sidebar-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); color: var(--text); cursor: pointer; }
.topbar-controls { display: flex; align-items: center; gap: .55rem; }
.context-chip, .tax-year-control, .theme-compact {
    min-height: 38px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text-2);
}
.context-chip { display: inline-flex; align-items: center; padding: 0 .78rem; font-size: .75rem; font-weight: 700; }
.tax-year-control { display: inline-flex; align-items: center; gap: .4rem; padding: 0 .35rem 0 .75rem; }
.tax-year-control span { font-size: .72rem; color: var(--text-3); }
.tax-year-control select { border: 0; outline: 0; padding: .45rem .45rem; background: transparent; color: var(--text); font-weight: 700; cursor: pointer; }
.tax-year-control option { color: #111; }
.theme-compact { width: 38px; cursor: pointer; }

.workspace-content { padding: clamp(1.25rem, 3vw, 2.4rem); }
.workspace-column { width: min(880px, 100%); margin: 0 auto; }
.workspace-welcome { padding: clamp(1.75rem, 3vw, 2.25rem) 0 7rem; }
.welcome-copy { max-width: 740px; }
.welcome-eyebrow { display: inline-block; margin-bottom: .55rem; color: var(--text-3); font-size: .75rem; font-weight: 500; letter-spacing: .02em; }
.welcome-copy h2 { margin: 0; max-width: 26ch; font-size: clamp(1.5rem, 2.4vw, 1.875rem); line-height: 1.25; letter-spacing: -.02em; font-weight: 600; text-wrap: balance; }

/* Quick-start chips: labelled prompts only, no descriptions, no duplicated nav cards. */
.prompt-chips { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 2rem; }
.prompt-chip { padding: .5rem .85rem; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); color: var(--text-2); cursor: pointer; font-family: inherit; font-size: .8125rem; font-weight: 500; transition: border-color .15s ease, color .15s ease, background .15s ease; }
.prompt-chip:hover { border-color: var(--border-strong); background: var(--surface-2); color: var(--text); }
.prompt-chip:focus-visible, .sidebar-action:focus-visible, .new-check-btn:focus-visible, .sidebar-link:focus-visible, .sidebar-toggle:focus-visible, .theme-compact:focus-visible, .main-chat-form button:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }

.main-chat-thread { display: none; flex-direction: column; gap: 1rem; padding: .5rem 0 1.25rem; }
.main-chat-thread.has-messages { display: flex; }
body.chat-started .workspace-welcome { display: none; }
.main-chat-message { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: .75rem; align-items: start; }
.main-chat-message.user { grid-template-columns: minmax(0, 1fr); }
.main-chat-message.user .main-chat-avatar { display: none; }
.main-chat-avatar {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--brand);
    font-size: .7rem;
    font-weight: 800;
    letter-spacing: .04em;
}
.main-chat-bubble { min-width: 0; }
.main-chat-message.user .main-chat-bubble {
    justify-self: end;
    max-width: min(720px, 92%);
    padding: .85rem 1rem;
    border-radius: 16px 16px 4px 16px;
    background: var(--surface-3);
    border: 1px solid var(--border);
    line-height: 1.6;
}
.main-chat-typing .main-chat-bubble { display: inline-flex; gap: .3rem; padding: .9rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); width: fit-content; }
.main-chat-typing span { width: 6px; height: 6px; border-radius: 50%; background: var(--text-3); animation: pulse 1.1s infinite ease-in-out; }
.main-chat-typing span:nth-child(2) { animation-delay: .15s; }
.main-chat-typing span:nth-child(3) { animation-delay: .3s; }
.main-chat-partial .main-chat-bubble { border-color: var(--risk); }
.stream-partial-note { margin: .75rem 0 .45rem; color: var(--text-3); font-size: .82rem; }
.main-chat-activity .main-chat-bubble { width: min(100%, 430px); padding: .15rem .8rem; background: var(--surface); }
.agent-activity-details summary { padding: .65rem 0; color: var(--text-2); cursor: pointer; font-size: .86rem; font-weight: 650; }
.agent-activity-list { display: grid; gap: .5rem; margin: 0 0 .65rem; padding: 0; list-style: none; }
.agent-activity-step { display: flex; align-items: center; gap: .55rem; color: var(--text-3); font-size: .82rem; }
.agent-activity-step > span:first-child { width: .65rem; height: .65rem; border: 2px solid var(--text-3); border-radius: 999px; }
.agent-activity-step.is-active { color: var(--text-2); }
.agent-activity-step.is-active > span:first-child { border-color: var(--brand); border-top-color: transparent; animation: activity-spin .8s linear infinite; }
.agent-activity-step.is-complete > span:first-child { position: relative; border-color: var(--success); background: var(--success); }
.agent-activity-step.is-complete > span:first-child::after { content: ''; position: absolute; left: 2px; top: 0; width: 2px; height: 4px; border: solid #fff; border-width: 0 1px 1px 0; transform: rotate(45deg); }
.agent-activity-step.is-interrupted > span:first-child { border-color: var(--risk); }
@keyframes activity-spin { to { transform: rotate(360deg); } }

/* Available to assistive technology only; keeps wait states announced without changing layout. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}
@keyframes pulse { 0%,100% { opacity:.25; } 50% { opacity:1; } }

.response-card {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--surface);
    box-shadow: var(--shadow);
}
.response-card__header { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; padding: 1rem 1.1rem; border-bottom: 1px solid var(--border); }
.response-card__mode { display: flex; gap: .7rem; align-items: flex-start; }
.response-card__icon { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 10px; background: var(--surface-3); color: var(--text); font-weight: 700; }
.response-card__eyebrow { margin: 0 0 .15rem; color: var(--text-3); font-size: .67rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.response-card__title { margin: 0; font-size: .98rem; }
.response-card__meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .35rem; }
.meta-pill { display: inline-flex; align-items: center; min-height: 28px; padding: 0 .6rem; border: 1px solid var(--border); border-radius: 999px; color: var(--text-2); background: var(--surface-2); font-size: .68rem; font-weight: 650; }
.response-card__body { padding: 1.05rem 1.1rem; color: var(--text); line-height: 1.65; }
.response-card__body p { margin: 0 0 .8rem; }
.response-card__body p:last-child { margin-bottom: 0; }
.response-card__footer { padding: .85rem 1.1rem; border-top: 1px solid var(--border); color: var(--text-3); font-size: .75rem; line-height: 1.5; }
.agent-conversation-reply > :first-child { margin-top: 0; }
.agent-conversation-reply > :last-child { margin-bottom: 0; }
.agent-conversation-reply h1, .agent-conversation-reply h2, .agent-conversation-reply h3 { margin: 1rem 0 .5rem; color: var(--text); line-height: 1.3; }
.agent-conversation-reply h1 { font-size: 1.2rem; }
.agent-conversation-reply h2 { font-size: 1.08rem; }
.agent-conversation-reply h3 { font-size: 1rem; }
.agent-conversation-reply ul, .agent-conversation-reply ol { margin: .65rem 0; padding-left: 1.3rem; }
.agent-conversation-reply li + li { margin-top: .35rem; }
.agent-conversation-reply code { padding: .1rem .3rem; border-radius: 4px; background: var(--surface-2); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; }
.agent-conversation-reply pre { overflow-x: auto; margin: .75rem 0; padding: .75rem; border-radius: 10px; background: var(--surface-2); }
.agent-conversation-reply pre code { padding: 0; background: none; }
.agent-conversation-reply a { color: var(--brand); text-decoration: underline; }
.response-card--research { border-top: 3px solid var(--info); }
.response-card--compliance { border-top: 3px solid var(--success); }
.response-card--clarification { border-top: 3px solid var(--brand); }
.response-card--scope { border-top: 3px solid var(--risk); }
.response-card--error { border-top: 3px solid var(--risk); }

.result-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .65rem; margin: .8rem 0 1rem; }
.result-metric { padding: .8rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-2); }
.result-metric span { display: block; color: var(--text-3); font-size: .68rem; text-transform: uppercase; letter-spacing: .07em; font-weight: 700; }
.result-metric strong { display: block; margin-top: .35rem; font-size: .92rem; line-height: 1.35; }
.classification-block { padding: .9rem; border-left: 3px solid var(--success); border-radius: 0 12px 12px 0; background: var(--success-soft); margin: .9rem 0; }
.classification-block span { color: var(--text-3); font-size: .68rem; text-transform: uppercase; font-weight: 700; letter-spacing: .07em; }
.classification-block p { margin: .35rem 0 0; }
.review-gate { margin: 1rem 0; padding: .95rem; border: 1px solid rgba(138,71,64,.4); border-radius: 14px; background: var(--risk-soft); }
.review-gate__label { display: flex; align-items: center; gap: .45rem; color: var(--text); font-weight: 700; }
.review-gate p { margin: .45rem 0 .35rem; color: var(--text-2); }
.review-gate ul, .source-list, .plain-list { margin: .45rem 0 0; padding-left: 1.2rem; }
.review-gate li, .source-list li, .plain-list li { margin: .35rem 0; color: var(--text-2); }
.source-list a { color: var(--text); text-decoration-color: color-mix(in srgb, var(--brand) 60%, transparent); text-underline-offset: 3px; }
.source-list small { color: var(--text-3); }

.provenance-details { margin-top: 1rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-2); }
.provenance-details summary { padding: .78rem .9rem; cursor: pointer; font-weight: 650; color: var(--text-2); }
.provenance-details__body { padding: 0 .9rem .9rem; border-top: 1px solid var(--border); }
.rule-block { margin-top: .8rem; }
.rule-block code { color: var(--brand); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .8rem; }

.clarification-card { display: grid; gap: .9rem; }
.clarification-progress { display: flex; gap: .35rem; }
.clarification-progress span { height: 3px; flex: 1; border-radius: 999px; background: var(--surface-3); }
.clarification-progress span.is-active { background: var(--brand); }
.clarification-question { padding: .95rem; border: 1px solid var(--border); border-radius: 14px; background: var(--surface-2); }
.clarification-question__label { margin: 0 0 .3rem; color: var(--text-3); font-size: .67rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; }
.clarification-question h3 { margin: 0; font-size: 1rem; line-height: 1.45; }
.clarification-question p { margin: .35rem 0 0; color: var(--text-3); font-size: .78rem; }
.clarification-options { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .8rem; }
.clarification-choice { min-height: 42px; padding: .6rem .8rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--text-2); cursor: pointer; }
.clarification-choice.is-selected { border-color: rgba(181,138,82,.55); background: var(--brand-soft); color: var(--text); }
.clarification-revenue { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: .65rem; margin-top: .8rem; }
.clarification-revenue input { width: 100%; min-height: 44px; padding: .65rem .75rem; border: 1px solid var(--border); border-radius: 10px; outline: none; background: var(--surface); color: var(--text); }
.clarification-actions { display: flex; gap: .55rem; flex-wrap: wrap; }
.clarification-actions button, .inline-action {
    min-height: 42px;
    padding: .6rem .9rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text);
    cursor: pointer;
    text-decoration: none;
    font-weight: 650;
}
.clarification-actions .primary, .inline-action.primary { border-color: var(--brand); background: var(--brand); color: #FFFFFF; }
.clarification-actions button:disabled { opacity: .45; cursor: not-allowed; }

.scope-next-steps { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .55rem; margin-top: .8rem; }
.scope-step { padding: .75rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-2); color: var(--text-2); font-size: .82rem; line-height: 1.45; }

.composer-dock { position: sticky; bottom: 0; padding: .8rem 0 1rem; background: linear-gradient(180deg, transparent, var(--bg) 26%); }
.main-chat-form { display: flex; align-items: flex-end; gap: .65rem; width: min(760px, 100%); margin: 0 auto; padding: .7rem; border: 1px solid #ECEEF3; border-radius: 18px; background: var(--surface); box-shadow: 0 4px 24px rgba(30, 35, 55, 0.05); }
body.dark-theme .main-chat-form { border-color: var(--border-strong); }
.main-chat-form:focus-within { border-color: var(--brand); }
.main-chat-form textarea { flex: 1; min-height: 46px; max-height: 170px; resize: none; border: 0; outline: 0; padding: .72rem .55rem; background: transparent; color: var(--text); font-size: .9375rem; line-height: 1.5; scrollbar-width: thin; scrollbar-color: var(--text-3) transparent; }
.main-chat-form textarea::placeholder { color: #999DA7; }
.main-chat-form button { width: 36px; height: 36px; flex: 0 0 36px; border: 0; border-radius: var(--radius-md); background: var(--brand); color: #FFFFFF; cursor: pointer; font-size: .95rem; font-weight: 600; }
.main-chat-form button:hover { background: var(--brand-strong); }
.main-chat-form button:disabled { opacity: .5; cursor: wait; }
.composer-footnote { display: flex; align-items: center; gap: .9rem; margin: .45rem .2rem 0; color: var(--text-3); font-size: .68rem; }
.composer-limits-link, .composer-footnote a { border: 0; background: transparent; color: var(--text-3); cursor: pointer; font-family: inherit; font-size: .68rem; text-decoration: none; }
.composer-limits-link:hover, .composer-footnote a:hover { color: var(--text-2); text-decoration: underline; text-underline-offset: 3px; }

.limits-dialog { width: min(430px, calc(100vw - 2rem)); padding: 0; border: 1px solid var(--border-strong); border-radius: 18px; background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.limits-dialog::backdrop { background: rgba(10, 8, 5, .55); }
.limits-dialog__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.1rem 1.2rem .6rem; }
.limits-dialog__head h2 { margin: 0; font-size: 1rem; font-weight: 600; }
.limits-dialog__close { width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 10px; background: transparent; color: var(--text-2); cursor: pointer; font-size: .85rem; }
.limits-dialog__close:hover { background: var(--surface-2); color: var(--text); }
.limits-dialog__body { padding: 0 1.2rem 1.2rem; color: var(--text-2); font-size: .84rem; line-height: 1.6; }
.limits-dialog__lede { margin: 0 0 .8rem; color: var(--text); }
.limits-dialog__list { margin: 0 0 .9rem; padding-left: 1.1rem; display: grid; gap: .4rem; }
.limits-dialog__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; padding-top: .9rem; border-top: 1px solid var(--border); }
.limits-dialog__link { color: var(--brand); font-weight: 600; font-size: .8rem; text-decoration: none; }
.limits-dialog__link:hover { text-decoration: underline; text-underline-offset: 3px; }

.system-notice { align-self: center; max-width: 86%; padding: .45rem .7rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface-2); color: var(--text-3); font-size: .72rem; text-align: center; }
.error-message { color: var(--text-2); }
.retry-chat-btn { margin-top: .6rem; }

@media (max-width: 900px) {
    .workspace-shell { grid-template-columns: 1fr; }
    .workspace-sidebar { position: fixed; left: 0; top: 0; width: min(310px, 86vw); transform: translateX(-105%); transition: transform .2s ease; box-shadow: var(--shadow); }
    body.sidebar-open .workspace-sidebar { transform: translateX(0); }
    .sidebar-backdrop { display: block; position: fixed; inset: 0; background: rgba(0,0,0,.45); opacity: 0; pointer-events: none; transition: opacity .2s ease; z-index: 70; }
    body.sidebar-open .sidebar-backdrop { opacity: 1; pointer-events: auto; }
    .sidebar-toggle { display: inline-grid; place-items: center; }
    .workspace-topbar { padding-inline: 1rem; }
}

@media (max-width: 680px) {
    .workspace-content { padding: 1rem; }
    .workspace-topbar { align-items: flex-start; }
    .workspace-kicker { display: none; }
    .topbar-controls { gap: .35rem; }
    .context-chip--static { display: none; }
    .tax-year-control span { display: none; }
    .workspace-welcome { padding-top: 2.5rem; padding-bottom: 8rem; }
    .welcome-copy h2 { font-size: clamp(2.1rem, 9vw, 2.9rem); }
    .prompt-chips { gap: .45rem; }
    .prompt-chip { font-size: .8125rem; }
    .prompt-chips { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
    .prompt-chips::-webkit-scrollbar { display: none; }
    .main-chat-message { grid-template-columns: 1fr; }
    .main-chat-avatar { display: none; }
    .main-chat-message.user .main-chat-bubble { max-width: 96%; }
    .response-card__header { flex-direction: column; }
    .response-card__meta { justify-content: flex-start; }
    .result-grid { grid-template-columns: 1fr; }
    .scope-next-steps { grid-template-columns: 1fr; }
    .clarification-revenue { grid-template-columns: 1fr; }
    .main-chat-form textarea { min-height: 68px; }
}