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brain-of-reese/frontend/assets/styles.css
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CSS

/* ==========================================================================
Brain of Reese — design system (no CDN; system fonts only)
Dark tech theme (phase 08): emoji-free chrome, subtle animated pure-CSS
background, WCAG 2.1 AA dark palette (every pair computed >= 4.5:1).
========================================================================== */
:root {
/* Palette — all text/background pairs meet WCAG 2.1 AA (>= 4.5:1) */
--bg: #0a0e17; /* page: ink on bg 16.2:1 */
--surface: #121a2e; /* ink on surface 14.5:1 */
--ink: #e8ebf4;
--ink-soft: #9aa4bd; /* 6.9:1 on --surface */
--line: #26304a; /* decorative 1px borders */
--brand: #6d78f2; /* text on brand is DARK ink (--bg): 5.2:1 —
never white on brand (3.7:1, fails) */
--brand-soft: #232b52;
--brand-ink: #a5b4fc; /* 8.7:1 on --surface, 6.9:1 on --brand-soft */
--accent-bg: #2b2110;
--accent-ink: #fbbf24; /* 9.5:1 on --accent-bg */
--accent-line: #f59e0b; /* 8.9:1 on --bg (deflection border) */
--ok-bg: #10241b;
--ok-ink: #6ee7a8; /* 10.6:1 on --ok-bg */
--err-bg: #2d1318;
--err-ink: #fca5a5; /* 9.1:1 on --err-bg */
--err-line: #ef4444; /* 4.6:1 on --err-bg (UI boundary, not text) */
--radius: 10px;
--radius-sm: 6px;
--shadow: 0 1px 2px rgb(0 0 0 / 0.30), 0 4px 16px rgb(0 0 0 / 0.35);
--shadow-lg: 0 4px 10px rgb(0 0 0 / 0.40), 0 12px 32px rgb(0 0 0 / 0.50);
--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
--header-h: 64px;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
/* The visible page background lives on <html> (the canvas). <body> must
stay transparent and must NOT create a stacking context, or the
z-index:-1 background layers below would be painted over. */
html { background: var(--bg); }
body {
margin: 0;
font-family: var(--font);
font-size: 16px;
line-height: 1.55;
color: var(--ink);
background: transparent;
position: relative;
display: flex;
flex-direction: column;
min-height: 100dvh;
}
/* ---------- Animated background (pure CSS, zero JS — phase 08) ---------- */
/* Fine drifting grid: 44px cells, 1px lines at ~35% --line alpha, masked
with a radial fade (visible center-top, fading to the edges). The drift
delta (44px) equals one cell, so the loop is seamless. */
body::before {
content: "";
position: fixed;
inset: 0;
z-index: -1;
pointer-events: none;
background-image:
linear-gradient(to right, rgb(38 48 74 / 0.35) 1px, transparent 1px),
linear-gradient(to bottom, rgb(38 48 74 / 0.35) 1px, transparent 1px);
background-size: 44px 44px;
-webkit-mask-image: radial-gradient(120% 90% at 50% 0%, black 25%, transparent 78%);
mask-image: radial-gradient(120% 90% at 50% 0%, black 25%, transparent 78%);
animation: bg-grid-drift 60s linear infinite;
}
@keyframes bg-grid-drift {
from { background-position: 0 0, 0 0; }
to { background-position: 44px 44px, 44px 44px; }
}
/* Two large, soft radial glows: indigo top-left, cyan bottom-right —
14s ease-in-out breathing (opacity + scale). No filter:blur (perf). */
body::after {
content: "";
position: fixed;
inset: 0;
z-index: -1;
pointer-events: none;
background-image:
radial-gradient(circle 56rem at 12% 8%, rgb(109 120 242 / 0.14), transparent 62%),
radial-gradient(circle 60rem at 88% 92%, rgb(34 211 238 / 0.10), transparent 62%);
animation: bg-glow-breathe 14s ease-in-out infinite alternate;
}
@keyframes bg-glow-breathe {
from { opacity: 0.65; transform: scale(1); }
to { opacity: 1; transform: scale(1.05); }
}
.container {
width: 100%;
max-width: 72rem;
margin-inline: auto;
padding-inline: 1.25rem;
}
/* ---------- Accessibility helpers ---------- */
/* The `hidden` attribute must always win — some components set an explicit
`display` (e.g. .kb-banner { display: flex }) which would otherwise override
the UA stylesheet's `[hidden] { display: none }` and leave the element visible. */
[hidden] { display: none !important; }
.visually-hidden {
position: absolute !important;
width: 1px; height: 1px;
margin: -1px; padding: 0;
overflow: hidden;
clip: rect(0 0 0 0);
white-space: nowrap;
border: 0;
}
.skip-link {
position: absolute;
left: -9999px;
top: 0;
background: var(--brand);
color: var(--bg);
padding: 0.6rem 1rem;
border-radius: 0 0 var(--radius-sm) 0;
z-index: 100;
}
.skip-link:focus { left: 0; }
:focus-visible {
outline: 3px solid var(--brand);
outline-offset: 2px;
border-radius: 4px;
}
::selection {
background: rgb(109 120 242 / 0.45);
color: var(--ink);
}
/* ---------- Header ---------- */
.app-header {
height: var(--header-h);
background: var(--surface);
position: sticky;
top: 0;
z-index: 20;
}
/* 2px brand→cyan gradient hairline under the sticky header (phase 08;
shared by the app header and the document-viewer header, phase 10). */
.app-header::after,
.doc-header::after {
content: "";
position: absolute;
inset-inline: 0;
bottom: -2px;
height: 2px;
pointer-events: none;
background: linear-gradient(
90deg,
rgb(109 120 242 / 0.55),
rgb(34 211 238 / 0.30) 45%,
rgb(34 211 238 / 0.05) 90%
);
}
.header-inner {
height: 100%;
display: flex;
align-items: center;
justify-content: space-between;
gap: 1rem;
}
.brand {
display: inline-flex;
align-items: center;
gap: 0.55rem;
font-size: 1.125rem;
color: var(--ink);
text-decoration: none;
}
/* Mono wordmark with letter-spacing — the "technical" touch (phase 08). */
.brand-text {
font-family: var(--mono);
font-size: 0.95rem;
letter-spacing: 0.08em;
}
.brand-mark { width: 22px; height: 22px; flex: 0 0 auto; display: block; }
.brand-text strong { color: var(--brand-ink); font-weight: 700; }
.app-nav { display: flex; gap: 0.25rem; }
.nav-link {
padding: 0.5rem 0.9rem;
border-radius: 999px;
text-decoration: none;
color: var(--ink-soft);
font-weight: 600;
font-size: 0.95rem;
min-height: 44px;
display: inline-flex;
align-items: center;
}
.nav-link:hover { background: var(--brand-soft); color: var(--brand-ink); }
.nav-link.is-active { background: var(--brand); color: var(--bg); }
/* ---------- Main frame ---------- */
.app-main {
flex: 1;
display: flex;
flex-direction: column;
padding-block: 1.25rem;
}
/* Chat is a vertical conversation: a centered, capped column is the
correct layout here (PLAN §UI/UX). The surrounding frame keeps it
from collapsing into a hairline on wide screens. */
.chat-shell {
max-width: 46rem;
margin-inline: auto;
display: flex;
flex-direction: column;
gap: 1rem;
flex: 1;
}
.messages {
display: flex;
flex-direction: column;
gap: 0.9rem;
min-height: 200px;
}
/* ---------- Messages ---------- */
.msg { display: flex; gap: 0.6rem; max-width: 100%; }
.msg .avatar {
flex: 0 0 auto;
width: 34px; height: 34px;
border-radius: 50%;
display: grid;
place-items: center;
background: var(--brand-soft);
border: 1px solid var(--line);
}
/* Emoji-free inline SVG glyphs (phase 08), currentColor so the theme
controls the stroke; sized to sit crisp at ~16-20px. */
.msg .avatar svg { width: 20px; height: 20px; display: block; }
.msg.brain .avatar { color: var(--brand-ink); }
.msg.user .avatar { color: var(--ink-soft); }
.msg-body {
max-width: 85%;
/* min-width: 0 — as a flex item this overrides min-width:auto so a
long unbroken token can wrap (overflow-wrap: anywhere) instead of
widening the bubble past the column (AC7, phase 07). */
min-width: 0;
display: flex;
flex-direction: column;
gap: 0.35rem;
}
.bubble {
padding: 0.7rem 1rem;
border-radius: var(--radius);
background: var(--surface);
border: 1px solid var(--line);
box-shadow: var(--shadow);
overflow-wrap: anywhere;
}
.bubble p { margin: 0.2rem 0; }
.bubble pre {
background: #0d1120;
color: #e6e9f2;
padding: 0.7rem 0.9rem;
border: 1px solid var(--line);
border-radius: var(--radius-sm);
overflow-x: auto;
font-size: 0.85rem;
font-family: var(--mono);
}
.bubble code { font-family: var(--mono); font-size: 0.88em; background: var(--brand-soft); padding: 0.08em 0.35em; border-radius: 5px; }
.bubble pre code { background: none; padding: 0; }
.msg.user { justify-content: flex-end; }
.msg.user .msg-body { align-items: flex-end; }
.msg.user .bubble {
background: var(--brand);
border-color: var(--brand);
color: var(--bg);
border-bottom-right-radius: 4px;
}
.msg.user .bubble code { background: rgb(10 14 23 / 0.16); }
.msg.brain .bubble { border-bottom-left-radius: 4px; }
.msg.brain.is-deflected .bubble {
background: var(--accent-bg);
border-color: var(--accent-line);
}
.msg-meta {
font-size: 0.75rem;
color: var(--ink-soft);
padding-inline: 0.25rem;
display: flex;
flex-wrap: wrap;
gap: 0.35rem;
align-items: center;
}
.source-chip {
display: inline-flex;
align-items: center;
gap: 0.3rem;
font-family: var(--mono);
font-size: 0.72rem;
background: var(--brand-soft);
color: var(--brand-ink);
border: 1px solid var(--line);
border-radius: 999px;
padding: 0.15rem 0.6rem;
text-decoration: none;
max-width: 100%;
/* min-width: 0 so the nowrap pill ellipsizes instead of widening its row */
min-width: 0;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
.source-chip:hover { background: #2a345f; text-decoration: underline; }
/* "Maybe try" chips under a deflected bubble (phase 04). Unlike the
onboarding row (which scrolls horizontally on mobile), this group wraps
at every width: the chips are the actionable follow-up, not decoration.
The pills themselves reuse .suggestion-chip (>=44px, brand-soft/ink). */
.maybe-try {
display: flex;
align-items: center;
flex-wrap: wrap;
gap: 0.45rem;
padding-inline: 0.25rem;
}
/* As flex items these chips must be allowed to shrink (min-width:auto
would let a long title-derived chip exceed the column on phones —
phase 07 overflow fix); the label text then wraps inside the pill. */
.maybe-try .suggestion-chip {
min-width: 0;
max-width: 100%;
}
/* typing indicator */
.typing { display: inline-flex; gap: 5px; padding: 0.9rem 1rem; }
.typing span {
width: 8px; height: 8px;
border-radius: 50%;
background: var(--ink-soft);
opacity: 0.5;
animation: typing 1.2s infinite ease-in-out;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing {
0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
30% { transform: translateY(-5px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
.typing span { animation: none; opacity: 0.7; }
}
/* ---------- Empty state & suggestions ---------- */
.empty-state {
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 2.5rem 1.75rem;
text-align: center;
margin-top: 1rem;
}
.empty-state-glyph { color: var(--brand-ink); width: 44px; height: 44px; margin-inline: auto; }
.empty-state-glyph svg { width: 44px; height: 44px; display: block; }
.empty-state-title { margin: 0.8rem 0 0.4rem; font-size: 1.5rem; color: var(--ink); }
.empty-state-sub { margin: 0 auto 1.25rem; max-width: 34rem; color: var(--ink-soft); }
.empty-state-sub code { font-family: var(--mono); font-size: 0.85em; background: var(--brand-soft); padding: 0.1em 0.35em; border-radius: 5px; }
.suggestions {
display: flex;
flex-wrap: wrap;
gap: 0.5rem;
justify-content: center;
list-style: none;
margin: 0;
padding: 0;
}
.suggestion-chip {
font: inherit;
font-size: 0.92rem;
font-weight: 600;
color: var(--brand-ink);
background: var(--brand-soft);
border: 1px solid var(--line);
border-radius: 999px;
padding: 0.55rem 1rem;
min-height: 44px;
cursor: pointer;
transition: background 0.15s ease, transform 0.05s ease;
}
.suggestion-chip:hover { background: #2a345f; }
.suggestion-chip:active { transform: scale(0.98); }
/* ---------- Composer ---------- */
.composer {
display: flex;
align-items: flex-end;
gap: 0.6rem;
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 0.6rem;
}
.composer:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft), var(--shadow); }
.composer textarea {
flex: 1;
font: inherit;
color: var(--ink);
border: 0;
resize: none;
max-height: 12rem;
padding: 0.55rem 0.5rem;
background: transparent;
}
.composer textarea::placeholder { color: var(--ink-soft); }
.send-btn {
display: inline-flex;
align-items: center;
justify-content: center;
gap: 0.45rem;
min-width: 84px;
min-height: 44px;
border: 0;
border-radius: var(--radius-sm);
background: var(--brand);
/* Dark ink on brand (5.2:1) — never white on brand (3.7:1, fails). */
color: var(--bg);
font: inherit;
font-weight: 700;
cursor: pointer;
padding-inline: 1rem;
}
.send-btn:hover:not(:disabled) { background: #7d88f5; }
.send-btn:disabled { background: #a5b4fc; cursor: not-allowed; }
/* Busy spinner: dark arc (--bg) on the #a5b4fc busy button = 9.7:1. */
.spinner {
width: 16px; height: 16px;
border: 2.5px solid rgb(10 14 23 / 0.30);
border-top-color: var(--bg);
border-radius: 50%;
animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
.spinner { animation-duration: 2s; }
}
/* The background layers are the only other motion on the page: under
reduced motion they go static (grid + glows remain, just still). */
@media (prefers-reduced-motion: reduce) {
body::before, body::after { animation: none; }
}
/* ---------- Banners ---------- */
.kb-banner {
display: flex;
align-items: center;
gap: 0.5rem;
background: var(--accent-bg);
color: var(--accent-ink);
border: 1px solid var(--accent-line);
border-radius: var(--radius-sm);
padding: 0.6rem 0.9rem;
font-size: 0.92rem;
font-weight: 600;
}
.kb-banner.is-error { background: var(--err-bg); color: var(--err-ink); border-color: var(--err-line); }
.kb-banner svg { width: 18px; height: 18px; flex: 0 0 auto; display: block; }
/* ---------- Sources page ---------- */
.sources-shell {
display: flex;
flex-direction: column;
gap: 1.25rem;
flex: 1;
}
.page-head h1 { margin: 0 0 0.25rem; font-size: 1.7rem; }
.page-sub { margin: 0; color: var(--ink-soft); }
.page-sub code { font-family: var(--mono); font-size: 0.85em; background: var(--brand-soft); padding: 0.1em 0.35em; border-radius: 5px; }
.stat-cards {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
gap: 0.9rem;
}
.stat-card {
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 1.1rem 1.25rem;
display: flex;
flex-direction: column;
gap: 0.15rem;
}
/* Mono stat values — technical readout (phase 08). */
.stat-value { font-family: var(--mono); font-size: 2rem; font-weight: 800; color: var(--brand-ink); line-height: 1.1; }
.stat-value-sm { font-size: 1.15rem; font-weight: 700; }
.stat-label { color: var(--ink-soft); font-size: 0.88rem; font-weight: 600; }
.table-wrap {
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
overflow-x: auto;
}
.docs-table {
width: 100%;
border-collapse: collapse;
min-width: 640px;
font-size: 0.93rem;
}
.docs-table th, .docs-table td {
text-align: left;
padding: 0.7rem 1rem;
border-bottom: 1px solid var(--line);
white-space: nowrap;
}
.docs-table th {
background: var(--brand-soft);
color: var(--brand-ink);
font-size: 0.82rem;
text-transform: uppercase;
letter-spacing: 0.04em;
position: sticky;
top: 0;
}
.docs-table td:nth-child(2) { font-family: var(--mono); font-size: 0.82rem; max-width: 30rem; overflow: hidden; text-overflow: ellipsis; }
.docs-table tbody tr:hover { background: var(--bg); }
.docs-table tbody tr:last-child td { border-bottom: 0; }
/* ---------- Document viewer (phase 10) ---------- */
.doc-header {
position: sticky;
top: 0;
z-index: 20;
background: var(--surface);
}
.doc-header-inner {
padding-block: 0.7rem;
display: flex;
align-items: center;
gap: 0.9rem;
}
/* Back link: pill with an SVG arrow + "Sources" (>=44px touch target). */
.doc-back {
display: inline-flex;
align-items: center;
gap: 0.4rem;
flex: 0 0 auto;
min-height: 44px;
padding: 0.45rem 0.9rem;
border-radius: 999px;
background: var(--brand-soft);
border: 1px solid var(--line);
color: var(--brand-ink); /* 6.9:1 on --brand-soft */
font-weight: 600;
font-size: 0.95rem;
text-decoration: none;
}
.doc-back:hover { background: #2a345f; }
.doc-back svg { width: 16px; height: 16px; display: block; }
.doc-title-block { min-width: 0; }
#doc-title {
margin: 0;
font-size: 1.3rem;
line-height: 1.3;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
/* Meta row: source badge · format badge · mono path · indexed · chunks. */
.doc-meta {
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 0.4rem;
margin-top: 0.35rem;
font-size: 0.78rem;
color: var(--ink-soft);
}
.doc-source-badge {
background: var(--brand-soft);
border: 1px solid var(--line);
color: var(--brand-ink);
font-weight: 600;
border-radius: 999px;
padding: 0.02rem 0.55rem;
}
.format-badge {
font-family: var(--mono);
background: var(--brand-soft);
border: 1px solid var(--line);
color: var(--brand-ink);
border-radius: var(--radius-sm);
padding: 0.02rem 0.45rem;
}
.doc-path {
font-family: var(--mono);
font-size: 0.75rem;
max-width: 26rem;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.doc-chunks { font-family: var(--mono); }
.doc-shell {
display: flex;
flex-direction: column;
gap: 1rem;
flex: 1;
}
#doc-content { display: flex; flex-direction: column; }
.doc-loading { margin: 1.5rem auto; text-align: center; color: var(--ink-soft); }
/* Markdown: the centered, ≤46rem reading column (PLAN §7.1). */
.doc-md {
width: 100%;
max-width: 46rem;
margin-inline: auto;
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 1.5rem 1.75rem;
overflow-wrap: anywhere;
}
.doc-md p { margin: 0.35rem 0; }
.doc-md h3 { margin: 1.1rem 0 0.4rem; font-size: 1.15rem; }
.doc-md h4 { margin: 0.9rem 0 0.35rem; font-size: 1rem; }
.doc-md > :first-child { margin-top: 0; }
.doc-md ul { margin: 0.4rem 0; padding-left: 1.3rem; }
.doc-md pre {
background: #0d1120;
color: #e6e9f2;
padding: 0.7rem 0.9rem;
border: 1px solid var(--line);
border-radius: var(--radius-sm);
overflow-x: auto;
font-size: 0.85rem;
font-family: var(--mono);
}
.doc-md code { font-family: var(--mono); font-size: 0.88em; background: var(--brand-soft); padding: 0.08em 0.35em; border-radius: 5px; }
.doc-md pre code { background: none; padding: 0; }
/* Raw (non-markdown) formats: full-width mono pre, horizontal scroll. */
.doc-raw {
width: 100%;
margin: 0;
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 1.25rem 1.5rem;
overflow-x: auto;
white-space: pre;
font-family: var(--mono);
font-size: 0.85rem;
line-height: 1.5;
}
/* Designed not-found state (no emoji — plain SVG mark, phase 08 rule). */
.doc-not-found {
width: 100%;
max-width: 30rem;
margin: 2rem auto;
background: var(--surface);
border: 1px solid var(--line);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 2.25rem 1.75rem;
text-align: center;
}
.doc-not-found-glyph { color: var(--ink-soft); width: 44px; height: 44px; margin-inline: auto; }
.doc-not-found-glyph svg { width: 44px; height: 44px; display: block; }
.doc-not-found h2 { margin: 0.8rem 0 0.4rem; font-size: 1.3rem; }
.doc-not-found-sub { margin: 0 0 1.25rem; color: var(--ink-soft); }
.doc-open-sources {
display: inline-flex;
align-items: center;
min-height: 44px;
padding: 0.5rem 1.1rem;
background: var(--brand);
color: var(--bg); /* dark ink on brand: 5.2:1 */
font-weight: 700;
text-decoration: none;
border-radius: var(--radius-sm);
}
.doc-open-sources:hover { background: #7d88f5; }
/* Viewer links: Sources-table path cell + chat source chips (phase 10). */
.doc-link {
color: var(--brand-ink); /* 8.7:1 on --surface */
text-decoration: none;
}
.doc-link:hover, .doc-link:focus-visible { text-decoration: underline; }
/* ---------- Footer ---------- */
.app-footer {
border-top: 1px solid var(--line);
background: var(--surface);
padding-block: 0.8rem;
margin-top: 1rem;
}
.footer-inner {
display: flex;
justify-content: space-between;
gap: 1rem;
color: var(--ink-soft);
font-size: 0.85rem;
}
/* ---------- Responsive (mobile-first adjustments) ---------- */
@media (max-width: 640px) {
:root { --header-h: 58px; }
.container { padding-inline: 0.9rem; }
.brand-text { font-size: 0.88rem; }
.nav-link { padding: 0.45rem 0.7rem; font-size: 0.9rem; }
.msg-body { max-width: 92%; }
.empty-state { padding: 1.75rem 1.1rem; margin-top: 0.25rem; }
.empty-state-title { font-size: 1.25rem; }
.suggestions { flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start;
padding-bottom: 0.4rem; -webkit-overflow-scrolling: touch; scrollbar-width: thin; }
.suggestion-chip { flex: 0 0 auto; }
.doc-header-inner { flex-wrap: wrap; gap: 0.5rem; padding-block: 0.6rem; }
#doc-title { font-size: 1.1rem; }
.doc-path { max-width: 16rem; }
.doc-md { padding: 1.1rem 1rem; }
.doc-raw { padding: 1rem; font-size: 0.8rem; }
.composer { padding: 0.5rem; }
.footer-inner { flex-direction: column; gap: 0.2rem; text-align: center; }
main { padding-bottom: env(safe-area-inset-bottom, 0); }
}