/* ============================================================
signal.css — Signal GTM chrome v3 (Lane D, Slice 2)
Palette + type pulled from signal.altiratech.com so the
marketing surface matches the product: IBM Plex Serif
headings, Plex Sans body, Plex Mono data; slate ground,
petrol-teal accent (amber alternate via data-theme).
This block REPLACES public/signal/signal.css in full.
============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
--bg: #131a22;            /* lifted slate ground (not near-black) */
--bg-2: #0f151c;
--panel: #182029;         /* Signal panel family (#121820, lifted) */
--panel-2: #1c2530;
--line: #29333f;
--line-strong: #3a4756;
--text-1: #e8edf2;
--text-2: #aab4c0;
--text-3: #7c8895;
--accent: #2ea7bd;        /* petrol-teal, from Signal #0d6b7f brightened */
--accent-strong: #45c2d8;
--accent-soft: rgba(46, 167, 189, .12);
--accent-line: rgba(46, 167, 189, .42);
--on-accent: #06222a;
--amber: #ffcf4a;         /* Signal status/CTA gold */
--good: #43c98b;
--warn: #e6a23c;
--r: 4px;                 /* sharp corners — no bubbles */
--r-sm: 3px;
}

/* Amber alternate — Signal's other native accent */
[data-theme="amber"] {
--accent: #d9a53a;
--accent-strong: #ffcf4a;
--accent-soft: rgba(255, 207, 74, .12);
--accent-line: rgba(255, 207, 74, .45);
--on-accent: #241a05;
}

html { scroll-behavior: smooth; }

body {
background:
linear-gradient(180deg, rgba(46, 167, 189, .05), transparent 22%),
radial-gradient(1100px 520px at 88% -8%, rgba(46, 167, 189, .07), transparent 60%),
var(--bg);
color: var(--text-1);
font-family: "IBM Plex Sans", system-ui, sans-serif;
line-height: 1.55;
-webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 1.35rem; }
a { color: inherit; }

h1, h2, h3, .serif { font-family: "IBM Plex Serif", Georgia, serif; }

/* ---- Top nav ---- */
.nav {
position: sticky; top: 0; z-index: 50;
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
background: rgba(19, 26, 34, .82);
border-bottom: 1px solid transparent;
transition: border-color .2s ease, background-color .2s ease;
}
.nav.scrolled { border-bottom-color: var(--line); background: rgba(19, 26, 34, .94); }

.nav-inner { display: flex; align-items: center; gap: 1.1rem; padding: .85rem 1.35rem; max-width: 1120px; margin: 0 auto; }

.brand { display: inline-flex; align-items: center; gap: .5rem; text-decoration: none; margin-right: .35rem; }
.brand-mark { width: 9px; height: 9px; background: var(--accent); box-shadow: 0 0 10px var(--accent-line); }
.brand-name { font-family: "IBM Plex Serif", serif; font-weight: 600; font-size: 1.12rem; letter-spacing: .01em; }
.brand-by { font-size: .74rem; color: var(--text-3); text-decoration: none; align-self: flex-end; padding-bottom: .15rem; }
.brand-by:hover, .brand-by:focus-visible { color: var(--text-2); outline: none; }

.nav-links { display: flex; gap: .1rem; align-items: center; }
.nav-links a {
font-size: .9rem; font-weight: 500; color: var(--text-2); text-decoration: none;
padding: .4rem .7rem; border-radius: var(--r-sm);
transition: color .15s ease, background-color .15s ease;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text-1); background: rgba(255, 255, 255, .05); outline: none; }
.nav-links .is-active { color: var(--text-1); }
.nav-links .is-active::after { content: ""; display: block; height: 2px; background: var(--accent); margin-top: 3px; }

.nav-cta { margin-left: auto; display: flex; gap: .55rem; align-items: center; }

/* ---- Buttons (sharp) ---- */
.button {
display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
border-radius: var(--r); padding: .6rem 1.1rem;
font-family: "IBM Plex Sans", sans-serif; font-size: .92rem; font-weight: 600;
text-decoration: none; border: 1px solid var(--line-strong); color: var(--text-1);
background: transparent; cursor: pointer;
transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}
.button:hover, .button:focus-visible { border-color: var(--accent-line); color: #fff; outline: none; }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.button.primary:hover, .button.primary:focus-visible { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--on-accent); }
.button.small { padding: .46rem .9rem; font-size: .86rem; }
.button:disabled { opacity: .7; cursor: wait; }

/* ---- Reveal (progressive enhancement: visible by default; JS hides
only below-fold elements, so a JS failure never hides content) ---- */
[data-reveal] { transition: opacity .55s ease, transform .55s ease; }
[data-reveal].pre-reveal { opacity: 0; transform: translateY(14px); }

/* ---- Hero ---- */
.hero { padding: 4.6rem 0 3.8rem; }
.hero-grid { display: grid; gap: 2.6rem; align-items: center; grid-template-columns: minmax(0, 1fr); }

.kicker {
display: inline-flex; align-items: center; gap: .5rem;
font-family: "IBM Plex Sans", sans-serif; font-size: .72rem; font-weight: 500;
letter-spacing: .12em; text-transform: uppercase; color: var(--accent-strong);
margin-bottom: 1.1rem;
}
.kicker::before { content: ""; width: 22px; height: 1px; background: var(--accent-line); }

.hero h1 { font-size: clamp(2.4rem, 5vw, 3.4rem); line-height: 1.08; font-weight: 600; letter-spacing: -.01em; margin-bottom: 1rem; }
.hero-support { font-size: 1.06rem; color: var(--text-2); max-width: 560px; line-height: 1.65; }
.hero-support strong { color: var(--text-1); font-weight: 600; }
.hero-support a { color: var(--text-1); text-underline-offset: 3px; }
.hero-support a:hover, .hero-support a:focus-visible { color: var(--accent-strong); outline: none; }

.hero-actions { display: flex; gap: .65rem; flex-wrap: wrap; align-items: center; margin-top: 1.5rem; }

.hero-checks { display: flex; gap: 1.3rem; flex-wrap: wrap; margin-top: 1.2rem; font-family: "IBM Plex Sans", sans-serif; font-size: .78rem; color: var(--text-3); }
.hero-checks span { display: inline-flex; align-items: center; gap: .42rem; }
.hero-checks span::before { content: ""; width: 5px; height: 5px; background: var(--accent); }

/* ---- Decision Record card (modeled on the app SCREEN→RECORD graphic) ---- */
.record-tilt { perspective: 1200px; }
.record-card {
border: 1px solid var(--line-strong);
background: linear-gradient(180deg, var(--panel-2), var(--panel));
box-shadow: 0 26px 60px -28px rgba(0, 0, 0, .7);
border-radius: var(--r);
max-width: 560px; width: 100%; justify-self: center; overflow: hidden;
transform-style: preserve-3d; transition: transform .18s ease; will-change: transform;
}

.rec-bar {
display: flex; justify-content: space-between; align-items: center; gap: .5rem;
padding: .55rem .85rem; border-bottom: 1px solid var(--line);
background: rgba(255, 255, 255, .02);
font-family: "IBM Plex Mono", monospace; font-size: .64rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3);
}
.rec-bar .flow { color: var(--accent-strong); }
.rec-dots { display: inline-flex; gap: 4px; }
.rec-dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--line-strong); display: inline-block; }

.rec-subject {
display: flex; align-items: center; gap: .55rem;
margin: .8rem .85rem 0; padding: .5rem .7rem;
border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--bg-2);
font-family: "IBM Plex Mono", monospace; font-size: .82rem; color: var(--text-1);
}
.rec-subject .q { color: var(--text-3); }
.rec-subject .tag { margin-left: auto; font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); border: 1px solid var(--line); padding: .1rem .4rem; border-radius: 2px; }

.rec-block { padding: .8rem .85rem 0; }
.rec-h {
font-family: "IBM Plex Mono", monospace; font-size: .62rem; letter-spacing: .12em; text-transform: uppercase;
color: var(--text-3); margin-bottom: .45rem; display: flex; justify-content: space-between;
}
.rec-h .ok { color: var(--good); }

.rec-source { display: flex; align-items: center; gap: .5rem; font-size: .82rem; color: var(--text-2); padding: .16rem 0; }
.rec-source .chk { color: var(--good); font-family: "IBM Plex Mono", monospace; }
.rec-source .n { margin-left: auto; font-family: "IBM Plex Mono", monospace; font-size: .72rem; color: var(--text-3); }

.rec-match { display: flex; align-items: baseline; gap: .5rem; padding: .28rem 0; border-top: 1px solid var(--line); }
.rec-match:first-of-type { border-top: none; }
.rec-match .nm { font-size: .84rem; color: var(--text-1); }
.rec-match .sub { font-size: .72rem; color: var(--text-3); }
.rec-match .pill { margin-left: auto; font-family: "IBM Plex Mono", monospace; font-size: .58rem; letter-spacing: .06em; text-transform: uppercase; padding: .12rem .42rem; border-radius: 2px; }
.pill.dismiss { color: var(--text-3); border: 1px solid var(--line-strong); }
.pill.review { color: var(--amber); border: 1px solid rgba(255, 207, 74, .45); background: rgba(255, 207, 74, .08); }

.rec-verdict {
margin: .8rem .85rem 0; padding: .55rem .7rem;
border: 1px solid var(--accent-line); background: var(--accent-soft); border-radius: var(--r-sm);
display: flex; justify-content: space-between; align-items: center; gap: .5rem;
}
.rec-verdict .lbl { font-family: "IBM Plex Mono", monospace; font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); }
.rec-verdict .val { font-size: .9rem; font-weight: 600; color: var(--accent-strong); }

.rec-brief { margin: .7rem .85rem 0; font-size: .8rem; color: var(--text-2); line-height: 1.55; }
.rec-brief .k { font-family: "IBM Plex Mono", monospace; font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); display: block; margin-bottom: .2rem; }

.rec-foot {
margin-top: .85rem; padding: .55rem .85rem; border-top: 1px solid var(--line);
display: flex; justify-content: space-between; gap: .5rem; flex-wrap: wrap;
font-family: "IBM Plex Mono", monospace; font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3);
}

.record-card .assemble { opacity: 0; transform: translateY(8px); animation: assemble .5s ease forwards; }
@keyframes assemble { to { opacity: 1; transform: none; } }

/* ---- Sections ---- */
.section { padding: 3.4rem 0; border-top: 1px solid var(--line); }
.section-kicker { font-family: "IBM Plex Sans", sans-serif; font-size: .72rem; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-strong); margin-bottom: .6rem; }
.section h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); font-weight: 600; letter-spacing: -.01em; margin-bottom: .65rem; max-width: 720px; line-height: 1.2; }
.section-intro { max-width: 680px; font-size: 1rem; color: var(--text-2); line-height: 1.65; }
.section-intro + .section-intro { margin-top: .5rem; }
.section-intro a { color: var(--text-1); text-underline-offset: 3px; }
.section-intro a:hover, .section-intro a:focus-visible { color: var(--accent-strong); outline: none; }

.grid-two { display: grid; gap: 1rem; grid-template-columns: minmax(0, 1fr); margin-top: 1.7rem; align-items: start; }
.grid-three { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin-top: 1.7rem; }

.panel { border: 1px solid var(--line); background: var(--panel); border-radius: var(--r); padding: 1.25rem 1.2rem; transition: border-color .18s ease; }
.panel:hover { border-color: var(--accent-line); }
.panel h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: .5rem; }
.panel p { font-size: .92rem; color: var(--text-2); line-height: 1.6; }

.step-no {
display: inline-flex; align-items: center; justify-content: center;
width: 1.7rem; height: 1.7rem; border-radius: var(--r-sm);
background: var(--accent-soft); border: 1px solid var(--accent-line);
color: var(--accent-strong); font-family: "IBM Plex Sans", sans-serif; font-weight: 600; font-size: .82rem; margin-bottom: .7rem;
}

.cap-list { list-style: none; display: grid; gap: .5rem; margin-top: .3rem; }
.cap-list li { font-size: .92rem; color: var(--text-2); line-height: 1.6; padding-left: 1.2rem; position: relative; }
.cap-list li::before { content: ""; position: absolute; left: 0; top: .58em; width: 6px; height: 6px; background: var(--accent); }
.cap-list strong { color: var(--text-1); font-weight: 600; }

.coverage-note { margin-top: 1.5rem; max-width: 680px; font-size: .95rem; color: var(--text-2); line-height: 1.65; border-left: 2px solid var(--accent-line); padding: .3rem 0 .3rem 1rem; }

/* ---- Price cards (sharp) ---- */
.price-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin-top: 1.7rem; }
.price-card { border: 1px solid var(--line); background: var(--panel); border-radius: var(--r); padding: 1.3rem 1.2rem; display: flex; flex-direction: column; gap: .7rem; position: relative; transition: border-color .18s ease; }
.price-card:hover { border-color: var(--accent-line); }
.price-card.featured { border-color: var(--accent-line); box-shadow: inset 0 2px 0 var(--accent); }
.price-badge { position: absolute; top: -.65rem; left: 1.1rem; background: var(--accent); color: var(--on-accent); font-family: "IBM Plex Sans", sans-serif; font-size: .62rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; border-radius: 2px; padding: .18rem .55rem; }
.price-plan { font-size: 1rem; font-weight: 600; color: var(--accent-strong); font-family: "IBM Plex Serif", serif; }
.price-line { font-family: "IBM Plex Serif", serif; font-size: 1.85rem; font-weight: 600; letter-spacing: -.01em; line-height: 1.15; }
.price-line .unit { font-family: "IBM Plex Sans", sans-serif; font-size: .86rem; font-weight: 400; color: var(--text-2); }
.price-sub { font-family: "IBM Plex Sans", sans-serif; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); }
.price-addl { font-size: .88rem; color: var(--text-2); line-height: 1.45; }
.price-points { list-style: none; display: grid; gap: .45rem; }
.price-points li { font-size: .9rem; color: var(--text-2); line-height: 1.55; padding-left: 1.15rem; position: relative; }
.price-points li::before { content: ""; position: absolute; left: 0; top: .55em; width: 6px; height: 6px; background: var(--accent); }
.price-cta { margin-top: auto; padding-top: .5rem; }

/* ---- FAQ ---- */
.faq { display: grid; gap: .55rem; margin-top: 1.7rem; max-width: 780px; }
.faq details { border: 1px solid var(--line); background: var(--panel); border-radius: var(--r); overflow: hidden; transition: border-color .18s ease; }
.faq details[open] { border-color: var(--accent-line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: .8rem; padding: .9rem 1.1rem; font-size: .96rem; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent-strong); font-size: 1.2rem; font-weight: 400; transition: transform .2s ease; flex-shrink: 0; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 1.1rem .95rem; font-size: .92rem; color: var(--text-2); line-height: 1.6; }

/* ---- Demo form ---- */
.form-panel { border: 1px solid var(--line); background: var(--panel); border-radius: var(--r); padding: 1.4rem 1.3rem; max-width: 720px; margin-top: 1.7rem; }
.form-grid { display: grid; gap: .85rem; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.field { display: grid; gap: .32rem; font-family: "IBM Plex Sans", sans-serif; font-size: .66rem; letter-spacing: .06em; text-transform: uppercase; color: var(--text-3); }
.field input, .field textarea {
width: 100%; border: 1px solid var(--line-strong); background: var(--bg-2); color: var(--text-1);
border-radius: var(--r-sm); padding: .62rem .72rem;
font-family: "IBM Plex Sans", sans-serif; font-size: .95rem; text-transform: none; letter-spacing: normal;
transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent-line); box-shadow: 0 0 0 2px var(--accent-soft); }
.field textarea { min-height: 120px; resize: vertical; }
.field.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
#form-status { min-height: 1.1rem; font-size: .88rem; color: var(--text-2); margin-top: .5rem; }
#form-status.is-success { color: var(--accent-strong); }
#form-status.is-error { color: var(--warn); }

/* ---- CTA panel ---- */
.cta-panel { border: 1px solid var(--accent-line); background: linear-gradient(120deg, var(--accent-soft), transparent 60%), var(--panel); border-radius: var(--r); padding: 2.1rem 1.8rem; display: grid; gap: .7rem; justify-items: start; }
.cta-panel h2 { font-size: 1.6rem; font-weight: 600; }
.cta-panel p { font-size: .98rem; color: var(--text-2); line-height: 1.6; max-width: 600px; }
.cta-actions { display: flex; gap: .65rem; flex-wrap: wrap; margin-top: .4rem; }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--line); padding: 2rem 0 2.4rem; margin-top: 3.4rem; }
.footer-inner { display: grid; gap: .8rem; }
.footer-copy { color: var(--text-3); font-size: .88rem; }
.footer-links { display: flex; gap: 1.3rem; flex-wrap: wrap; font-size: .88rem; font-weight: 500; }
.footer-links a { color: var(--text-2); text-decoration: none; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--accent-strong); outline: none; }
.footer-meta { display: flex; gap: 1.3rem; flex-wrap: wrap; color: var(--text-3); font-family: "IBM Plex Sans", sans-serif; font-size: .74rem; }
.footer-meta a { color: inherit; text-decoration: none; }
.footer-meta a:hover, .footer-meta a:focus-visible { color: var(--text-2); outline: none; }


/* ---- Compare page ---- */
.lede { max-width: 720px; }
.cmp-split { display: grid; gap: 1rem; grid-template-columns: minmax(0,1fr); margin-top: 1.7rem; }
.cmp-side { border: 1px solid var(--line); background: var(--panel); border-radius: var(--r); padding: 1.2rem 1.15rem; }
.cmp-side.ours { border-color: var(--accent-line); box-shadow: inset 0 2px 0 var(--accent); }
.cmp-side .tag { font-family: "IBM Plex Sans", sans-serif; font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); margin-bottom: .5rem; }
.cmp-side.ours .tag { color: var(--accent-strong); }
.cmp-side h3 { font-size: 1.15rem; margin-bottom: .5rem; }
.cmp-side p { font-size: .93rem; color: var(--text-2); line-height: 1.6; }

.vendor-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin-top: 1.7rem; }
.vendor { border: 1px solid var(--line); background: var(--panel); border-radius: var(--r); padding: 1.2rem 1.15rem; display: grid; gap: .5rem; align-content: start; }
.vendor .cat { font-family: "IBM Plex Sans", sans-serif; font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-strong); }
.vendor h3 { font-size: 1.05rem; }
.vendor p { font-size: .9rem; color: var(--text-2); line-height: 1.58; }
.vendor .diff { font-size: .9rem; color: var(--text-1); line-height: 1.58; border-top: 1px solid var(--line); padding-top: .55rem; margin-top: .2rem; }
.vendor .diff b { color: var(--accent-strong); font-weight: 600; }

.cmp-table-wrap { margin-top: 1.7rem; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); }
table.cmp { width: 100%; border-collapse: collapse; min-width: 640px; }
table.cmp th, table.cmp td { text-align: left; padding: .7rem .85rem; font-size: .88rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.cmp thead th { font-family: "IBM Plex Sans", sans-serif; font-size: .78rem; font-weight: 600; letter-spacing: .01em; text-transform: none; color: var(--text-1); background: rgba(255,255,255,.02); }
table.cmp thead th.ours { color: var(--accent-strong); background: var(--accent-soft); }
table.cmp thead th .ex { display: block; margin-top: .25rem; font-weight: 400; font-size: .7rem; color: var(--text-3); }
table.cmp thead th.ours .ex { color: var(--accent-strong); opacity: .85; }
table.cmp tbody th { font-weight: 600; color: var(--text-1); }
table.cmp td { color: var(--text-2); }
table.cmp td.ours { color: var(--text-1); background: var(--accent-soft); font-weight: 500; }
table.cmp tr:last-child th, table.cmp tr:last-child td { border-bottom: none; }
.cmp-foot-note { margin-top: .7rem; font-size: .82rem; color: var(--text-3); line-height: 1.5; max-width: 720px; }

.honesty { border: 1px solid var(--line-strong); background: var(--panel); border-radius: var(--r); padding: 1.3rem 1.25rem; margin-top: 1.7rem; }
.honesty h3 { font-size: 1.1rem; margin-bottom: .6rem; }
.honesty ul { list-style: none; display: grid; gap: .6rem; }
.honesty li { font-size: .92rem; color: var(--text-2); line-height: 1.6; padding-left: 1.2rem; position: relative; }
.honesty li::before { content: "—"; position: absolute; left: 0; color: var(--text-3); }
.honesty strong { color: var(--text-1); font-weight: 600; }


.vendor .eg { font-size: .82rem; color: var(--text-3); margin-top: -.15rem; }
.cost-lead { font-family: "IBM Plex Serif", serif; font-size: 1.15rem; font-weight: 600; margin-bottom: .35rem; }
.gap-card { margin-top: 1rem; }

@media (prefers-reduced-motion: reduce) {
html { scroll-behavior: auto; }
[data-reveal] { opacity: 1; transform: none; transition: none; }
.record-card .assemble { animation: none; opacity: 1; transform: none; }
.record-card, .panel, .price-card, .button { transition: none; }
}

@media (min-width: 980px) {
.hero-grid { grid-template-columns: minmax(0, 1fr) minmax(0, .96fr); }
.grid-two { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}

@media (max-width: 760px) {
.hero { padding: 3rem 0 2.8rem; }
.section { padding: 2.5rem 0; }
.form-row { grid-template-columns: 1fr; }
.nav-links { display: none; }
}