/* Freya End-to-End Latency — A Field Engineer's Deep Dive. Distinct identity from the voice-settings guide: a "stopwatch / waterfall" theme. Cyan-teal accent on near-black ink, timeline rails everywhere. No frameworks, no CDN, no build step. Works offline. Light + dark. */ :root { /* latency accent: cyan-teal, reads as "clock / signal" */ --accent: #0bb6c2; --accent-2: #6d5cff; /* secondary, for "LLM" lanes */ --accent-soft: #0bb6c216; --accent-line: #0bb6c238; --bg: #f7f9fb; --surface: #ffffff; --surface-2: #f1f4f7; --ink: #0e1726; --ink-2: #354253; --ink-3: #66738a; --hair: #d2dae3; --hair-soft: #e6ebf1; --ok: #0a8f5b; --ok-soft: #0a8f5b14; --warn: #b26a00; --warn-soft: #b26a0014; --dead: #c2253c; --dead-soft: #c2253c12; /* timeline stage colours (used by lib.js waterfall) */ --st-vad: #f0a020; --st-stt: #2aa0d8; --st-llm: #6d5cff; --st-tts: #18b58a; --st-net: #98a4b5; --radius: 14px; --radius-sm: 9px; --maxw: 1080px; --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace; --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif; } /* ---------- dark mode (auto + manual override on ) ---------- */ @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --accent-soft: #0bb6c220; --accent-line: #0bb6c24a; --bg: #0b1018; --surface: #121a24; --surface-2: #0e151e; --ink: #eaf0f6; --ink-2: #b7c2d0; --ink-3: #7c8a9c; --hair: #243140; --hair-soft: #1b2632; --ok: #3fcf8e; --ok-soft: #3fcf8e1c; --warn: #e0a13a; --warn-soft: #e0a13a1c; --dead: #ff6b81; --dead-soft: #ff6b811c; } } :root[data-theme="dark"] { --accent-soft: #0bb6c220; --accent-line: #0bb6c24a; --bg: #0b1018; --surface: #121a24; --surface-2: #0e151e; --ink: #eaf0f6; --ink-2: #b7c2d0; --ink-3: #7c8a9c; --hair: #243140; --hair-soft: #1b2632; --ok: #3fcf8e; --ok-soft: #3fcf8e1c; --warn: #e0a13a; --warn-soft: #e0a13a1c; --dead: #ff6b81; --dead-soft: #ff6b811c; } * { box-sizing: border-box; } html { scroll-behavior: smooth; scroll-padding-top: 72px; } body { margin: 0; font-family: var(--sans); color: var(--ink); background: var(--bg); line-height: 1.55; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; } /* ---------- top nav ---------- */ .topnav { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 22px; padding: 0 24px; height: 56px; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(160%) blur(18px); -webkit-backdrop-filter: saturate(160%) blur(18px); border-bottom: 1px solid var(--hair-soft); } .topnav .brand { font-weight: 600; letter-spacing: -0.01em; font-size: 15px; color: var(--ink); text-decoration: none; white-space: nowrap; display: inline-flex; align-items: center; gap: 8px; } .topnav .brand b { color: var(--accent); } /* little stopwatch glyph before the brand */ .topnav .brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); display: inline-block; } .topnav .links { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; } .topnav .links::-webkit-scrollbar { display: none; } .topnav .links a { font-size: 13px; color: var(--ink-3); text-decoration: none; padding: 6px 10px; border-radius: 8px; white-space: nowrap; transition: background 0.15s, color 0.15s; } .topnav .links a:hover { color: var(--ink); background: var(--hair-soft); } .topnav .links a.active { color: var(--accent); background: var(--accent-soft); font-weight: 600; } .topnav .spacer { flex: 1; } .topnav .theme-toggle { flex: none; font-family: var(--mono); font-size: 12px; color: var(--ink-3); background: transparent; border: 1px solid var(--hair); border-radius: 8px; padding: 5px 10px; cursor: pointer; transition: color 0.15s, border-color 0.15s; } .topnav .theme-toggle:hover { color: var(--accent); border-color: var(--accent-line); } /* ---------- layout ---------- */ .container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; } .wide { max-width: 1240px; } /* ---------- hero ---------- */ .hero { position: relative; text-align: center; padding: 84px 24px 52px; overflow: hidden; background: radial-gradient(1200px 420px at 50% -140px, var(--accent-soft), transparent 70%); } /* faint timeline gridlines behind the hero — the "stopwatch" motif */ .hero::before { content: ""; position: absolute; inset: 0; background-image: repeating-linear-gradient(90deg, var(--hair-soft) 0 1px, transparent 1px 80px); -webkit-mask-image: linear-gradient(180deg, transparent, #000 40%, transparent); mask-image: linear-gradient(180deg, transparent, #000 40%, transparent); opacity: 0.6; pointer-events: none; } .hero > * { position: relative; } .hero .eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; } .hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.05; letter-spacing: -0.025em; margin: 0 0 18px; font-weight: 750; } .hero p { font-size: clamp(17px, 2.4vw, 21px); color: var(--ink-2); max-width: 720px; margin: 0 auto 8px; } .hero .sub { font-size: 14px; color: var(--ink-3); margin-top: 18px; } .hero .sub code { font-family: var(--mono); background: var(--surface); padding: 2px 7px; border-radius: 6px; border: 1px solid var(--hair); } /* ---------- the latency equation block (hero / index) ---------- */ .equation { max-width: 760px; margin: 30px auto 0; text-align: left; background: var(--surface); border: 1px solid var(--hair); border-radius: var(--radius); padding: 20px 22px; box-shadow: 0 8px 30px rgba(8, 18, 30, 0.06); } .equation .eqlbl { font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; } .equation pre { margin: 0; background: var(--surface-2); color: var(--ink); font-size: 12.5px; line-height: 1.75; padding: 14px 16px; border-radius: var(--radius-sm); border: 1px solid var(--hair-soft); overflow-x: auto; } .equation pre .term { color: var(--accent); font-weight: 600; } .equation pre .cmt { color: var(--ink-3); } /* ---------- part header (subpages) ---------- */ .parthead { position: relative; padding: 60px 24px 38px; border-bottom: 1px solid var(--hair-soft); background: radial-gradient(900px 320px at 0% -90px, var(--accent-soft), transparent 70%); overflow: hidden; } .parthead::before { content: ""; position: absolute; inset: 0; background-image: repeating-linear-gradient(90deg, var(--hair-soft) 0 1px, transparent 1px 64px); -webkit-mask-image: linear-gradient(90deg, #000, transparent 60%); mask-image: linear-gradient(90deg, #000, transparent 60%); opacity: 0.5; pointer-events: none; } .parthead > * { position: relative; } .parthead .kicker { font-size: 13px; font-weight: 600; color: var(--accent); letter-spacing: 0.04em; text-transform: uppercase; } .parthead h1 { font-size: clamp(26px, 4.5vw, 40px); letter-spacing: -0.02em; margin: 10px 0 12px; } .parthead p { font-size: 18px; color: var(--ink-2); max-width: 740px; margin: 0; } /* ---------- section / step blocks ---------- */ section { padding: 26px 0; } .step { position: relative; background: var(--surface); border: 1px solid var(--hair-soft); border-radius: var(--radius); padding: 24px 26px 24px 28px; margin: 16px 0; box-shadow: 0 1px 2px rgba(8, 18, 30, 0.04); } /* a thin "rail" down the left of every step — the timeline spine */ .step::before { content: ""; position: absolute; left: 0; top: 14px; bottom: 14px; width: 3px; border-radius: 3px; background: var(--accent-line); } .step.s-vad::before { background: var(--st-vad); } .step.s-stt::before { background: var(--st-stt); } .step.s-llm::before { background: var(--st-llm); } .step.s-tts::before { background: var(--st-tts); } .step.s-net::before { background: var(--st-net); } .step h2, .step h3 { letter-spacing: -0.015em; } .step h2 { font-size: 21px; margin: 0 0 6px; } .step .stepno { display: inline-block; font-family: var(--mono); font-size: 12px; color: var(--accent); background: var(--accent-soft); padding: 2px 9px; border-radius: 999px; margin-bottom: 12px; } .step p { color: var(--ink-2); margin: 10px 0; } .step ul, .step ol { color: var(--ink-2); padding-left: 20px; } .step li { margin: 5px 0; } h2, h3, h4 { color: var(--ink); } /* spec row: key/range/default chips */ .spec { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; } .spec .chip { font-family: var(--mono); font-size: 12px; padding: 5px 10px; border-radius: 8px; border: 1px solid var(--hair); background: var(--surface); color: var(--ink-2); } .spec .chip b { color: var(--ink); font-weight: 600; } .spec .chip.key { border-color: var(--accent-line); color: var(--accent); } /* a "budget" pill: shows a millisecond cost inline */ .ms { font-family: var(--mono); font-size: 12px; font-weight: 600; color: var(--accent); background: var(--accent-soft); border: 1px solid var(--accent-line); padding: 1px 7px; border-radius: 6px; } /* labels */ .tag { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.02em; padding: 2px 8px; border-radius: 6px; vertical-align: middle; } .tag.dead { color: var(--dead); background: var(--dead-soft); } .tag.warn { color: var(--warn); background: var(--warn-soft); } .tag.ok { color: var(--ok); background: var(--ok-soft); } .tag.vad { color: #9a6a08; background: #f0a02018; } .tag.stt { color: #1d7bab; background: #2aa0d818; } .tag.llm { color: #5647d6; background: #6d5cff18; } .tag.tts { color: #0e8f6c; background: #18b58a18; } /* callouts */ .callout { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 14px 18px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 16px 0; font-size: 15px; color: var(--ink-2); } .callout.dead { border-left-color: var(--dead); background: var(--dead-soft); } .callout.warn { border-left-color: var(--warn); background: var(--warn-soft); } .callout.ok { border-left-color: var(--ok); background: var(--ok-soft); } .callout .h { display: block; font-weight: 600; color: var(--ink); margin-bottom: 4px; } .ask { border: 1px dashed var(--accent-line); border-radius: var(--radius-sm); padding: 12px 16px; margin: 16px 0; font-size: 14px; color: var(--ink-2); background: var(--surface); } .ask .h { font-weight: 600; color: var(--accent); } .ask code { font-family: var(--mono); font-size: 12.5px; background: var(--accent-soft); padding: 1px 5px; border-radius: 5px; } /* symptom -> fix line */ .symptom { font-size: 14px; color: var(--ink-3); margin-top: 8px; } .symptom b { color: var(--ink); } /* collapsible checkpoint */ details.checkpoint { border: 1px solid var(--hair); border-radius: var(--radius-sm); padding: 0; margin: 16px 0; background: var(--surface); overflow: hidden; } details.checkpoint > summary { cursor: pointer; list-style: none; padding: 12px 16px; font-size: 14px; font-weight: 600; color: var(--ink); display: flex; align-items: center; gap: 8px; } details.checkpoint > summary::-webkit-details-marker { display: none; } details.checkpoint > summary::before { content: "?"; font-family: var(--mono); font-weight: 700; width: 18px; height: 18px; flex: none; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: inline-flex; align-items: center; justify-content: center; font-size: 12px; } details.checkpoint[open] > summary { border-bottom: 1px solid var(--hair-soft); } details.checkpoint .body { padding: 14px 16px; font-size: 14px; color: var(--ink-2); } details.checkpoint .body p { margin: 8px 0; } /* ---------- demos ---------- */ .demo { border: 1px solid var(--hair); border-radius: var(--radius); background: var(--surface); padding: 22px; margin: 20px 0; } .demo .demo-title { font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; } .demo label { font-size: 13px; color: var(--ink-2); display: block; margin: 10px 0 4px; font-weight: 500; } .demo .row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; } .demo input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 4px; border-radius: 2px; background: var(--hair); outline: none; margin: 6px 0; } .demo input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 2px solid var(--surface); box-shadow: 0 1px 4px rgba(0,0,0,0.25); } .demo input[type=range]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 2px solid var(--surface); } .demo .readout { font-family: var(--mono); font-size: 13px; color: var(--accent); font-weight: 600; min-width: 64px; text-align: right; } .demo .verdict { margin-top: 14px; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; } .demo .verdict.good { background: var(--ok-soft); color: var(--ok); } .demo .verdict.bad { background: var(--dead-soft); color: var(--dead); } .demo .verdict.neutral { background: var(--hair-soft); color: var(--ink-2); } .demo select, .demo input[type=text], .demo textarea { font-family: var(--sans); font-size: 14px; padding: 8px 11px; border: 1px solid var(--hair); border-radius: 8px; background: var(--surface); color: var(--ink); width: 100%; } .demo textarea { min-height: 70px; resize: vertical; } .demo .toggle-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; } .demo .tg { display: flex; align-items: center; gap: 8px; padding: 8px 11px; border: 1px solid var(--hair); border-radius: 8px; font-size: 13px; cursor: pointer; user-select: none; background: var(--surface); } .demo .tg input { accent-color: var(--accent); } .demo .out { font-family: var(--mono); font-size: 13px; line-height: 1.7; background: #0c121b; color: #d7e2ee; padding: 14px 16px; border-radius: var(--radius-sm); margin-top: 12px; white-space: pre-wrap; word-break: break-word; } .demo .out .hl { color: #67e8d4; } .demo .out .hl2 { color: #b3a7ff; } /* svg timeline / waterfall */ .demo svg, .tl svg { width: 100%; height: auto; display: block; } .demo .legend, .tl .legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--ink-3); margin-top: 10px; } .demo .legend i, .tl .legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: middle; margin-right: 5px; } /* standalone timeline figure (not in a demo) */ .tl { border: 1px solid var(--hair); border-radius: var(--radius); background: var(--surface); padding: 20px 22px; margin: 20px 0; } .tl .tl-title { font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; } /* ---------- tables ---------- */ table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; } th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--hair-soft); vertical-align: top; } th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-3); font-weight: 600; } table.sortable thead th { cursor: pointer; user-select: none; white-space: nowrap; transition: color 0.15s; } table.sortable thead th:hover, table.sortable thead th:focus-visible { color: var(--accent); outline: none; } table.sortable thead th[aria-sort="ascending"], table.sortable thead th[aria-sort="descending"] { color: var(--accent); } .sort-ind { font-size: 10px; color: var(--accent); } td code, p code, li code { font-family: var(--mono); font-size: 12.5px; background: var(--hair-soft); padding: 1px 5px; border-radius: 5px; color: var(--ink); } /* budget table: healthy / suspect columns */ td.healthy { color: var(--ok); font-family: var(--mono); font-weight: 600; } td.suspect { color: var(--dead); font-family: var(--mono); font-weight: 600; } tr.total td { font-weight: 700; border-top: 2px solid var(--hair); } /* ---------- code block ---------- */ pre { background: #0c121b; color: #d7e2ee; padding: 16px 18px; border-radius: var(--radius-sm); overflow-x: auto; font-size: 13px; line-height: 1.6; } pre code { font-family: var(--mono); background: none; padding: 0; color: inherit; } /* ---------- part cards (index) ---------- */ .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin: 28px 0; } .card { position: relative; display: block; text-decoration: none; color: inherit; background: var(--surface); border: 1px solid var(--hair-soft); border-radius: var(--radius); padding: 22px 22px 22px 24px; transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s; overflow: hidden; } .card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--accent); opacity: 0.55; transition: opacity 0.18s; } .card.c-vad::before { background: var(--st-vad); } .card.c-stt::before { background: var(--st-stt); } .card.c-llm::before { background: var(--st-llm); } .card.c-tts::before { background: var(--st-tts); } .card.c-net::before { background: var(--st-net); } .card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(8,18,30,0.10); border-color: var(--accent-line); } .card:hover::before { opacity: 1; } .card .num { font-family: var(--mono); font-size: 12px; color: var(--accent); font-weight: 600; } .card h3 { margin: 8px 0 6px; font-size: 17px; letter-spacing: -0.01em; } .card p { font-size: 14px; color: var(--ink-3); margin: 0; } .card .meta { margin-top: 12px; font-size: 12px; color: var(--ink-3); } /* ---------- turn pipeline strip (index) ---------- */ .pipeline { display: flex; flex-wrap: wrap; gap: 8px; align-items: stretch; margin: 22px 0; justify-content: center; } .pstage { flex: 1 1 110px; min-width: 100px; max-width: 150px; border: 1px solid var(--hair); border-radius: var(--radius-sm); padding: 12px 10px; background: var(--surface); text-align: center; cursor: pointer; transition: border-color 0.15s, background 0.15s, transform 0.15s; border-top: 3px solid var(--hair); } .pstage.g-vad { border-top-color: var(--st-vad); } .pstage.g-stt { border-top-color: var(--st-stt); } .pstage.g-llm { border-top-color: var(--st-llm); } .pstage.g-tts { border-top-color: var(--st-tts); } .pstage.g-net { border-top-color: var(--st-net); } .pstage:hover, .pstage.active { background: var(--accent-soft); transform: translateY(-2px); } .pstage .pname { font-size: 13px; font-weight: 600; } .pstage .pcost { font-family: var(--mono); font-size: 11px; color: var(--ink-3); margin-top: 3px; } .pipeline-detail { margin-top: 8px; padding: 16px 18px; border-radius: var(--radius-sm); background: var(--accent-soft); font-size: 14px; color: var(--ink-2); min-height: 48px; } .pipeline-detail a { color: var(--accent); font-weight: 600; text-decoration: none; } /* ---------- prev/next footer ---------- */ .partfoot { display: flex; justify-content: space-between; gap: 12px; margin: 40px 0 64px; padding-top: 24px; border-top: 1px solid var(--hair-soft); } .partfoot a { text-decoration: none; color: var(--ink); font-size: 14px; border: 1px solid var(--hair); border-radius: var(--radius-sm); padding: 12px 18px; transition: border-color 0.15s, background 0.15s; flex: 1; max-width: 48%; } .partfoot a:hover { border-color: var(--accent); background: var(--accent-soft); } .partfoot a.next { text-align: right; } .partfoot a .lbl { display: block; font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.03em; } .partfoot a.disabled { opacity: 0.4; pointer-events: none; } /* ---------- footer ---------- */ .sitefoot { padding: 40px 24px 64px; text-align: center; color: var(--ink-3); font-size: 13px; border-top: 1px solid var(--hair-soft); } /* ---------- scroll reveal ---------- */ .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; } .reveal.in { opacity: 1; transform: none; } @media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } } @media (max-width: 640px) { .topnav { gap: 12px; padding: 0 14px; } .step { padding: 20px 18px 20px 20px; } .partfoot { flex-direction: column; } .partfoot a { max-width: 100%; } }