feat(ui): dark tech theme — emoji-free chrome, subtle animated CSS background, WCAG AA dark palette
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@@ -1,30 +1,33 @@
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/* ==========================================================================
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Brain of Reese — design system (no CDN; system fonts only)
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Dark tech theme (phase 08): emoji-free chrome, subtle animated pure-CSS
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background, WCAG 2.1 AA dark palette (every pair computed >= 4.5:1).
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========================================================================== */
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:root {
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/* Palette — all text/background pairs meet WCAG 2.1 AA (>= 4.5:1) */
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--bg: #f4f5fb;
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--surface: #ffffff;
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--ink: #1c2130; /* 14.9:1 on --surface */
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--ink-soft: #4a5168; /* 7.6:1 on --surface */
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--line: #e3e6f0;
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--brand: #4f46e5; /* white on brand: 6.3:1 */
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--brand-soft: #eef0fe;
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--brand-ink: #3730a3;
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--accent-bg: #fff7e8;
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--accent-ink: #92400e; /* 8.7:1 on --accent-bg */
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--accent-line: #f59e0b;
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--ok-ink: #15803d;
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--ok-bg: #f0fdf4;
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--err-ink: #b91c1c;
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--err-bg: #fef2f2;
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--err-line: #fecaca;
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--bg: #0a0e17; /* page: ink on bg 16.2:1 */
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--surface: #121a2e; /* ink on surface 14.5:1 */
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--ink: #e8ebf4;
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--ink-soft: #9aa4bd; /* 6.9:1 on --surface */
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--line: #26304a; /* decorative 1px borders */
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--brand: #6d78f2; /* text on brand is DARK ink (--bg): 5.2:1 —
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never white on brand (3.7:1, fails) */
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--brand-soft: #232b52;
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--brand-ink: #a5b4fc; /* 8.7:1 on --surface, 6.9:1 on --brand-soft */
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--accent-bg: #2b2110;
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--accent-ink: #fbbf24; /* 9.5:1 on --accent-bg */
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--accent-line: #f59e0b; /* 8.9:1 on --bg (deflection border) */
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--ok-bg: #10241b;
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--ok-ink: #6ee7a8; /* 10.6:1 on --ok-bg */
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--err-bg: #2d1318;
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--err-ink: #fca5a5; /* 9.1:1 on --err-bg */
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--err-line: #ef4444; /* 4.6:1 on --err-bg (UI boundary, not text) */
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--radius: 14px;
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--radius-sm: 9px;
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--shadow: 0 1px 2px rgb(28 33 48 / 0.06), 0 4px 16px rgb(28 33 48 / 0.07);
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--shadow-lg: 0 4px 10px rgb(28 33 48 / 0.08), 0 12px 32px rgb(28 33 48 / 0.12);
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--radius: 10px;
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--radius-sm: 6px;
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--shadow: 0 1px 2px rgb(0 0 0 / 0.30), 0 4px 16px rgb(0 0 0 / 0.35);
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--shadow-lg: 0 4px 10px rgb(0 0 0 / 0.40), 0 12px 32px rgb(0 0 0 / 0.50);
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--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
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--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
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@@ -36,18 +39,66 @@
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html, body { height: 100%; }
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/* The visible page background lives on <html> (the canvas). <body> must
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stay transparent and must NOT create a stacking context, or the
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z-index:-1 background layers below would be painted over. */
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html { background: var(--bg); }
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body {
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margin: 0;
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font-family: var(--font);
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font-size: 16px;
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line-height: 1.55;
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color: var(--ink);
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background: var(--bg);
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background: transparent;
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position: relative;
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display: flex;
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flex-direction: column;
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min-height: 100dvh;
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}
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/* ---------- Animated background (pure CSS, zero JS — phase 08) ---------- */
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/* Fine drifting grid: 44px cells, 1px lines at ~35% --line alpha, masked
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with a radial fade (visible center-top, fading to the edges). The drift
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delta (44px) equals one cell, so the loop is seamless. */
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body::before {
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content: "";
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position: fixed;
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inset: 0;
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z-index: -1;
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pointer-events: none;
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background-image:
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linear-gradient(to right, rgb(38 48 74 / 0.35) 1px, transparent 1px),
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linear-gradient(to bottom, rgb(38 48 74 / 0.35) 1px, transparent 1px);
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background-size: 44px 44px;
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-webkit-mask-image: radial-gradient(120% 90% at 50% 0%, black 25%, transparent 78%);
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mask-image: radial-gradient(120% 90% at 50% 0%, black 25%, transparent 78%);
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animation: bg-grid-drift 60s linear infinite;
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}
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@keyframes bg-grid-drift {
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from { background-position: 0 0, 0 0; }
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to { background-position: 44px 44px, 44px 44px; }
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}
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/* Two large, soft radial glows: indigo top-left, cyan bottom-right —
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14s ease-in-out breathing (opacity + scale). No filter:blur (perf). */
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body::after {
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content: "";
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position: fixed;
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inset: 0;
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z-index: -1;
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pointer-events: none;
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background-image:
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radial-gradient(circle 56rem at 12% 8%, rgb(109 120 242 / 0.14), transparent 62%),
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radial-gradient(circle 60rem at 88% 92%, rgb(34 211 238 / 0.10), transparent 62%);
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animation: bg-glow-breathe 14s ease-in-out infinite alternate;
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}
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@keyframes bg-glow-breathe {
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from { opacity: 0.65; transform: scale(1); }
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to { opacity: 1; transform: scale(1.05); }
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}
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.container {
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width: 100%;
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max-width: 72rem;
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@@ -76,7 +127,7 @@ body {
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left: -9999px;
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top: 0;
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background: var(--brand);
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color: #fff;
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color: var(--bg);
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padding: 0.6rem 1rem;
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border-radius: 0 0 var(--radius-sm) 0;
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z-index: 100;
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@@ -89,15 +140,34 @@ body {
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border-radius: 4px;
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}
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::selection {
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background: rgb(109 120 242 / 0.45);
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color: var(--ink);
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}
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/* ---------- Header ---------- */
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.app-header {
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height: var(--header-h);
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background: var(--surface);
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border-bottom: 1px solid var(--line);
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position: sticky;
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top: 0;
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z-index: 20;
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}
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/* 2px brand→cyan gradient hairline under the sticky header (phase 08). */
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.app-header::after {
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content: "";
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position: absolute;
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inset-inline: 0;
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bottom: -2px;
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height: 2px;
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pointer-events: none;
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background: linear-gradient(
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90deg,
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rgb(109 120 242 / 0.55),
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rgb(34 211 238 / 0.30) 45%,
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rgb(34 211 238 / 0.05) 90%
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);
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}
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.header-inner {
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height: 100%;
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display: flex;
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@@ -113,7 +183,13 @@ body {
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color: var(--ink);
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text-decoration: none;
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}
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.brand-mark { font-size: 1.4rem; }
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/* Mono wordmark with letter-spacing — the "technical" touch (phase 08). */
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.brand-text {
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font-family: var(--mono);
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font-size: 0.95rem;
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letter-spacing: 0.08em;
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}
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.brand-mark { width: 22px; height: 22px; flex: 0 0 auto; display: block; }
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.brand-text strong { color: var(--brand-ink); font-weight: 700; }
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.app-nav { display: flex; gap: 0.25rem; }
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@@ -129,7 +205,7 @@ body {
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align-items: center;
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}
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.nav-link:hover { background: var(--brand-soft); color: var(--brand-ink); }
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.nav-link.is-active { background: var(--brand); color: #fff; }
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.nav-link.is-active { background: var(--brand); color: var(--bg); }
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/* ---------- Main frame ---------- */
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.app-main {
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@@ -166,10 +242,14 @@ body {
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border-radius: 50%;
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display: grid;
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place-items: center;
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font-size: 1.05rem;
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background: var(--brand-soft);
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border: 1px solid var(--line);
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}
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/* Emoji-free inline SVG glyphs (phase 08), currentColor so the theme
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controls the stroke; sized to sit crisp at ~16-20px. */
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.msg .avatar svg { width: 20px; height: 20px; display: block; }
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.msg.brain .avatar { color: var(--brand-ink); }
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.msg.user .avatar { color: var(--ink-soft); }
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.msg-body {
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max-width: 85%;
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/* min-width: 0 — as a flex item this overrides min-width:auto so a
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@@ -190,9 +270,10 @@ body {
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}
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.bubble p { margin: 0.2rem 0; }
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.bubble pre {
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background: #10131c;
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background: #0d1120;
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color: #e6e9f2;
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padding: 0.7rem 0.9rem;
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border: 1px solid var(--line);
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border-radius: var(--radius-sm);
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overflow-x: auto;
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font-size: 0.85rem;
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@@ -206,10 +287,10 @@ body {
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.msg.user .bubble {
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background: var(--brand);
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border-color: var(--brand);
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color: #fff;
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color: var(--bg);
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border-bottom-right-radius: 4px;
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}
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.msg.user .bubble code { background: rgb(255 255 255 / 0.18); }
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.msg.user .bubble code { background: rgb(10 14 23 / 0.16); }
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.msg.brain .bubble { border-bottom-left-radius: 4px; }
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.msg.brain.is-deflected .bubble {
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@@ -245,7 +326,7 @@ body {
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text-overflow: ellipsis;
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white-space: nowrap;
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}
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.source-chip:hover { background: #e2e5fd; }
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.source-chip:hover { background: #2a345f; }
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/* "Maybe try" chips under a deflected bubble (phase 04). Unlike the
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onboarding row (which scrolls horizontally on mobile), this group wraps
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@@ -295,7 +376,8 @@ body {
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text-align: center;
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margin-top: 1rem;
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}
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.empty-state-emoji { font-size: 2.6rem; line-height: 1; }
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.empty-state-glyph { color: var(--brand-ink); width: 44px; height: 44px; margin-inline: auto; }
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.empty-state-glyph svg { width: 44px; height: 44px; display: block; }
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.empty-state-title { margin: 0.8rem 0 0.4rem; font-size: 1.5rem; color: var(--ink); }
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.empty-state-sub { margin: 0 auto 1.25rem; max-width: 34rem; color: var(--ink-soft); }
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.empty-state-sub code { font-family: var(--mono); font-size: 0.85em; background: var(--brand-soft); padding: 0.1em 0.35em; border-radius: 5px; }
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@@ -322,7 +404,7 @@ body {
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cursor: pointer;
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transition: background 0.15s ease, transform 0.05s ease;
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}
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.suggestion-chip:hover { background: #e2e5fd; }
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.suggestion-chip:hover { background: #2a345f; }
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.suggestion-chip:active { transform: scale(0.98); }
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/* ---------- Composer ---------- */
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@@ -347,6 +429,7 @@ body {
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padding: 0.55rem 0.5rem;
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background: transparent;
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}
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.composer textarea::placeholder { color: var(--ink-soft); }
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.send-btn {
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display: inline-flex;
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align-items: center;
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@@ -357,19 +440,21 @@ body {
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border: 0;
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border-radius: var(--radius-sm);
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background: var(--brand);
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color: #fff;
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/* Dark ink on brand (5.2:1) — never white on brand (3.7:1, fails). */
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color: var(--bg);
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font: inherit;
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font-weight: 700;
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cursor: pointer;
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padding-inline: 1rem;
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}
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.send-btn:hover:not(:disabled) { background: #4338ca; }
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.send-btn:hover:not(:disabled) { background: #7d88f5; }
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.send-btn:disabled { background: #a5b4fc; cursor: not-allowed; }
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/* Busy spinner: dark arc (--bg) on the #a5b4fc busy button = 9.7:1. */
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.spinner {
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width: 16px; height: 16px;
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border: 2.5px solid rgb(255 255 255 / 0.4);
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border-top-color: #fff;
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border: 2.5px solid rgb(10 14 23 / 0.30);
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border-top-color: var(--bg);
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border-radius: 50%;
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animation: spin 0.8s linear infinite;
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}
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@@ -377,6 +462,11 @@ body {
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@media (prefers-reduced-motion: reduce) {
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.spinner { animation-duration: 2s; }
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}
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/* The background layers are the only other motion on the page: under
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reduced motion they go static (grid + glows remain, just still). */
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@media (prefers-reduced-motion: reduce) {
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body::before, body::after { animation: none; }
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}
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/* ---------- Banners ---------- */
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.kb-banner {
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@@ -392,6 +482,7 @@ body {
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font-weight: 600;
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}
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.kb-banner.is-error { background: var(--err-bg); color: var(--err-ink); border-color: var(--err-line); }
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.kb-banner svg { width: 18px; height: 18px; flex: 0 0 auto; display: block; }
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/* ---------- Sources page ---------- */
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.sources-shell {
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@@ -419,7 +510,8 @@ body {
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flex-direction: column;
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gap: 0.15rem;
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}
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.stat-value { font-size: 2rem; font-weight: 800; color: var(--brand-ink); line-height: 1.1; }
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/* Mono stat values — technical readout (phase 08). */
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.stat-value { font-family: var(--mono); font-size: 2rem; font-weight: 800; color: var(--brand-ink); line-height: 1.1; }
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.stat-value-sm { font-size: 1.15rem; font-weight: 700; }
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.stat-label { color: var(--ink-soft); font-size: 0.88rem; font-weight: 600; }
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@@ -474,7 +566,7 @@ body {
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@media (max-width: 640px) {
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:root { --header-h: 58px; }
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.container { padding-inline: 0.9rem; }
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.brand-text { font-size: 1rem; }
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.brand-text { font-size: 0.88rem; }
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.nav-link { padding: 0.45rem 0.7rem; font-size: 0.9rem; }
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.msg-body { max-width: 92%; }
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.empty-state { padding: 1.75rem 1.1rem; margin-top: 0.25rem; }
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