/* Tiervis — tiervis.com
   One stylesheet, no build step, no external fonts or scripts. */

:root {
    --ground:    #f4f7f9;
    --surface:   #ffffff;
    --raised:    #e8eef2;
    --line:      #d3dde4;
    --ink:       #3b4a57;
    --ink-strong:#0f1d2a;
    --muted:     #61717f;
    --accent:    #13867c;
    --accent-ink:#ffffff;
    --accent-soft: rgba(19, 134, 124, .10);
    --add:       #2f8a2a;
    --warn:      #b5700b;
    --remove:    #c42d3f;
    --code-bg:   #0f1d2a;
    --code-ink:  #dfe8ef;
    --code-dim:  #8399ab;
    --shadow: 0 1px 2px rgba(15, 29, 42, .06), 0 12px 32px rgba(15, 29, 42, .08);
    --sans: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
    --display: "Segoe UI Variable Display", "Segoe UI Semibold", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --ground:    #0c1724;
        --surface:   #122233;
        --raised:    #182c41;
        --line:      #23405a;
        --ink:       #c3d0dc;
        --ink-strong:#eef3f8;
        --muted:     #8ea2b5;
        --accent:    #2fb8ac;
        --accent-ink:#04211e;
        --accent-soft: rgba(47, 184, 172, .14);
        --add:       #6fcf5f;
        --warn:      #e7a33e;
        --remove:    #f0695a;
        --code-bg:   #08111b;
        --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 18px 48px rgba(0, 0, 0, .35);
        color-scheme: dark;
    }
}
:root[data-theme="dark"] {
    --ground: #0c1724; --surface: #122233; --raised: #182c41; --line: #23405a;
    --ink: #c3d0dc; --ink-strong: #eef3f8; --muted: #8ea2b5;
    --accent: #2fb8ac; --accent-ink: #04211e; --accent-soft: rgba(47, 184, 172, .14);
    --add: #6fcf5f; --warn: #e7a33e; --remove: #f0695a; --code-bg: #08111b;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 18px 48px rgba(0, 0, 0, .35);
    color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--ground);
    color: var(--ink);
    font: 17px/1.6 var(--sans);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { color: var(--ink-strong); font-family: var(--display); letter-spacing: -0.02em; }
code, pre { font-family: var(--mono); }

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--surface); padding: 8px 12px; z-index: 10; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--ground) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink-strong); font-family: var(--display); font-weight: 700; font-size: 1.2rem; letter-spacing: -0.01em; }
.brand svg { flex: none; }
.site-nav { display: flex; gap: 4px; }
.site-nav a { color: var(--muted); text-decoration: none; padding: 6px 12px; border-radius: 6px; font-size: .95rem; }
.site-nav a:hover { color: var(--ink-strong); background: var(--raised); }
.site-nav a[aria-current="page"] { color: var(--ink-strong); background: var(--raised); }

/* Buttons */
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 8px; font-weight: 600; text-decoration: none; font-size: 1rem; border: 1px solid transparent; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: var(--line); color: var(--ink-strong); background: var(--surface); }
.btn.ghost:hover { border-color: var(--accent); }

/* Hero */
.hero { padding-block: 88px 72px; }
.hero.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: .85rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; margin: 0 0 16px; }
.eyebrow img { width: 22px; height: 22px; border-radius: 5px; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); line-height: 1.06; margin: 0 0 20px; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 34em; margin: 0 0 32px; }
.small { color: var(--muted); font-size: .9rem; margin: 14px 0 0; }

/* Sections */
section.band { padding: 80px 0; border-top: 1px solid var(--line); }
section.band.alt { background: var(--surface); }
.band h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); line-height: 1.15; margin: 0 0 14px; max-width: 24em; }
.band .intro { color: var(--muted); max-width: 40em; margin: 0 0 40px; font-size: 1.05rem; }

/* Product cards (home) */
.products { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.product { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 32px; box-shadow: var(--shadow); text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.product:hover { border-color: var(--accent); transform: translateY(-2px); }
.product header { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.product header img { width: 52px; height: 52px; border-radius: 12px; }
.product h3 { margin: 0; font-size: 1.6rem; }
.product .kind { color: var(--muted); font-size: .9rem; margin: 2px 0 0; }
.product .pitch { font-size: 1.15rem; color: var(--ink-strong); font-weight: 600; margin: 0 0 10px; line-height: 1.4; }
.product p { margin: 0 0 18px; }
.product ul { margin: 0 0 24px; padding-left: 20px; }
.product li { margin: 4px 0; }
.product .more { margin-top: auto; font-weight: 600; color: var(--accent); }
.product .more::after { content: " →"; }

/* Feature grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid.two { grid-template-columns: 1fr 1fr; }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.band.alt .card { background: var(--ground); }
.card h3 { font-size: 1.1rem; margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); font-size: .97rem; }

/* Pairs (plain two-column list) */
.pairs { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 36px 48px; }
.pairs h3 { font-size: 1.08rem; margin: 0 0 6px; }
.pairs p { margin: 0; color: var(--muted); }

/* Engines */
.engines { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.engines li { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: .95rem; color: var(--ink-strong); }
.engines li small { color: var(--muted); margin-left: 4px; }

/* Screenshot frame */
.shot { border-radius: 12px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--surface); }
.shot-light { display: none; }
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) .shot-dark { display: none; } :root:not([data-theme="dark"]) .shot-light { display: block; } }
figure { margin: 0; }
figcaption { color: var(--muted); font-size: .9rem; margin-top: 12px; }

/* Tigerfish: live compare example */
.diff { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); font-size: .9rem; }
.diff-head { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: .85rem; color: var(--ink-strong); }
.diff-head .count { margin-left: auto; color: var(--muted); font-family: var(--sans); }
.diff-code { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); }
.diff-code > div { padding: 12px 16px; overflow-x: auto; }
.diff-code > div + div { border-left: 1px solid var(--line); }
.diff-code .label { font-family: var(--sans); font-size: .78rem; color: var(--muted); margin-bottom: 6px; }
.diff-code pre { margin: 0; font-size: .78rem; line-height: 1.55; color: var(--ink); }
.diff-code mark { background: rgba(47, 138, 42, .16); color: var(--add); border-radius: 2px; }
.diff ul { list-style: none; margin: 0; padding: 8px 0; font-family: var(--mono); font-size: .8rem; }
.diff li { padding: 4px 16px; }
.diff li b { display: inline-block; width: 1.2em; }
.diff .a b { color: var(--add); }
.diff .m b { color: var(--warn); }
.diff-note { padding: 12px 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }

/* Sailfish: attention queue */
.queue { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); }
.queue .say { padding: 18px 22px; border-bottom: 1px solid var(--line); font-size: 1.02rem; color: var(--ink-strong); line-height: 1.45; }
.queue .say b { color: var(--remove); }
.row { display: grid; grid-template-columns: 6px 1fr auto; gap: 14px; padding: 14px 20px 14px 0; border-bottom: 1px solid var(--line); opacity: 0; transform: translateY(6px); animation: rise .45s ease-out forwards; }
.row:last-child { border-bottom: 0; }
.row .bar { border-radius: 0 3px 3px 0; }
.row.crit .bar { background: var(--remove); } .row.high .bar { background: var(--warn); } .row.med .bar { background: #5b9fe6; }
.row .t { font-weight: 600; font-size: .96rem; color: var(--ink-strong); }
.row .why { color: var(--muted); font-size: .84rem; margin-top: 2px; }
.row .fix { align-self: center; font-size: .78rem; font-weight: 700; padding: 5px 10px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); white-space: nowrap; }
.row .fix.wait { background: transparent; color: var(--muted); border: 1px solid var(--line); font-weight: 500; }
.row:nth-child(3) { animation-delay: .12s } .row:nth-child(4) { animation-delay: .24s } .row:nth-child(5) { animation-delay: .36s } .row:nth-child(6) { animation-delay: .48s }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .row { animation: none; opacity: 1; transform: none; } .product { transition: none; } }

/* Sailfish: fix pipeline */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(6, 1fr); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; counter-reset: s; }
.steps li { padding: 20px 18px; border-right: 1px solid var(--line); background: var(--surface); counter-increment: s; }
.band.alt .steps li { background: var(--ground); }
.steps li:last-child { border-right: 0; }
.steps li::before { content: counter(s); display: block; font-family: var(--mono); color: var(--accent); font-size: .85rem; margin-bottom: 8px; }
.steps b { display: block; margin-bottom: 4px; color: var(--ink-strong); }
.steps span { color: var(--muted); font-size: .88rem; line-height: 1.4; display: block; }

/* Sailfish: autonomy ladder */
.ladder { display: grid; grid-template-columns: repeat(4, 1fr); align-items: end; }
.rung { padding: 18px 20px; border-left: 2px solid var(--line); background: linear-gradient(to top, var(--accent-soft), transparent); }
.rung:nth-child(1) { height: 120px } .rung:nth-child(2) { height: 160px } .rung:nth-child(3) { height: 200px } .rung:nth-child(4) { height: 240px; border-left-color: var(--accent); }
.rung b { display: block; margin-bottom: 6px; color: var(--ink-strong); }
.rung span { color: var(--muted); font-size: .92rem; }

/* Code */
pre.code { background: var(--code-bg); color: var(--code-ink); border-radius: 12px; padding: 20px 22px; overflow-x: auto; font-size: .85rem; line-height: 1.65; margin: 0; }
pre.code .c { color: var(--code-dim); }

/* Principles list */
.principles { counter-reset: p; list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 28px 48px; }
.principles li { counter-increment: p; padding-left: 48px; position: relative; }
.principles li::before { content: "0" counter(p); position: absolute; left: 0; top: 2px; font-family: var(--mono); color: var(--accent); font-size: .9rem; }
.principles b { display: block; color: var(--ink-strong); margin-bottom: 4px; font-size: 1.05rem; }
.principles span { color: var(--muted); }

/* Final CTA */
.final { text-align: center; }
.final h2 { margin: 0 auto 14px; }
.final .intro { margin: 0 auto 28px; }
.final .cta { justify-content: center; }

/* Contact */
.contact { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 28px; box-shadow: var(--shadow); }
.contact-card h3 { margin: 0 0 6px; font-size: 1.1rem; }
.contact-card p { margin: 0 0 20px; color: var(--muted); }
.contact-card a.mail { font-size: 1.2rem; font-weight: 600; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 56px; color: var(--muted); font-size: .92rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--ink-strong); }

@media (max-width: 960px) {
    .hero.split, .contact { grid-template-columns: 1fr; gap: 40px; }
    .hero { padding-block: 56px 48px; }
    .products, .grid.two { grid-template-columns: 1fr; }
    .grid, .grid.four, .pairs { grid-template-columns: 1fr 1fr; }
    .steps { grid-template-columns: 1fr 1fr 1fr; }
    .steps li { border-bottom: 1px solid var(--line); }
    .ladder { grid-template-columns: 1fr 1fr; gap: 12px; }
    .rung { height: auto !important; }
}
@media (max-width: 640px) {
    body { font-size: 16px; }
    .wrap { padding: 0 16px; }
    .site-header .wrap { height: auto; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; }
    .site-nav { width: 100%; justify-content: space-between; }
    .site-nav a { padding: 6px 8px; }
    .grid, .grid.four, .pairs, .principles, .steps, .ladder { grid-template-columns: 1fr; }
    .steps li { border-right: 0; }
    .product { padding: 24px; }
    .diff-code { grid-template-columns: 1fr; }
    .diff-code > div + div { border-left: 0; border-top: 1px solid var(--line); }
    .row { grid-template-columns: 6px 1fr; }
    .row .fix { grid-column: 2; justify-self: start; }
    section.band { padding: 56px 0; }
}

/* Imagery slots. Each hero can carry a generated photo or loop (see IMAGERY.md).
   Missing files fall back to the gradient, so the page never shows a broken image. */
.hero-media { position: relative; overflow: hidden; border-bottom: 1px solid var(--line);
    background:
        radial-gradient(1100px 500px at 85% -10%, rgba(47, 184, 172, .22), transparent 60%),
        radial-gradient(800px 420px at -10% 110%, rgba(91, 159, 230, .16), transparent 60%),
        var(--ground); }
.hero-media .bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .28; }
.hero-media video.bg { width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .8s; }
.hero-media video.bg.ready { opacity: .28; }
.hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 40%, var(--ground)); pointer-events: none; }
.hero-media > .wrap { position: relative; z-index: 1; }
.home-bg { background-image: url(img/hero-home.jpg); }
.tigerfish-bg { background-image: url(img/hero-tigerfish.jpg); }
.sailfish-bg { background-image: url(img/hero-sailfish.jpg); }
.company-bg { background-image: url(img/hero-company.jpg); }
@media (prefers-reduced-motion: reduce) { .hero-media video.bg { display: none; } }

.photo-band { position: relative; min-height: 340px; border-top: 1px solid var(--line); display: flex; align-items: flex-end;
    background: linear-gradient(120deg, #0e1a2b, #13243a 55%, #1f3854); color: #eef3f8; overflow: hidden; }
.photo-band .bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.photo-band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8, 17, 27, .85), rgba(8, 17, 27, .1) 70%); }
.photo-band .wrap { position: relative; z-index: 1; padding-top: 120px; padding-bottom: 48px; width: 100%; }
.photo-band blockquote { margin: 0; font-family: var(--display); font-size: clamp(1.4rem, 3vw, 2rem); line-height: 1.25; max-width: 26em; letter-spacing: -0.01em; }
.band-home { background-image: url(img/band-estate.jpg); }

/* Tigerfish: bullet list beside the Diagnose example */
.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.ticks li { padding-left: 28px; position: relative; color: var(--muted); }
.ticks li::before { content: ""; position: absolute; left: 4px; top: .55em; width: 10px; height: 10px; border-radius: 3px; background: var(--accent); }
.ticks b { color: var(--ink-strong); }
code { font-size: .9em; background: var(--accent-soft); color: var(--ink-strong); padding: 1px 5px; border-radius: 4px; }

/* Tigerfish: how workspaces hand work on */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin: 0 0 32px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.flow > div { position: relative; padding: 20px 22px 20px 20px; background: var(--surface); border-right: 1px solid var(--line); }
.flow > div:last-child { border-right: 0; }
.flow > div:not(:last-child)::after { content: "→"; position: absolute; right: -9px; top: 50%; transform: translateY(-50%); z-index: 1; background: var(--ground); color: var(--accent); font-weight: 700; line-height: 1; padding: 2px 0; }
.flow b { display: block; color: var(--ink-strong); margin-bottom: 4px; }
.flow span { color: var(--muted); font-size: .9rem; line-height: 1.4; display: block; }
.workspaces li { font-size: .9rem; }
@media (max-width: 960px) { .flow { grid-template-columns: 1fr; } .flow > div { border-right: 0; border-bottom: 1px solid var(--line); } .flow > div:last-child { border-bottom: 0; } .flow > div:not(:last-child)::after { content: "↓"; right: auto; left: 20px; top: auto; bottom: -11px; transform: none; padding: 0 4px; } }