/* ============================================================
   CORTESSA — product site for Clydeside Digital
   Art direction: "precision instrument" — ink ground, cyan
   instrument hairlines, mono engineering callouts, editorial type.
   ============================================================ */

:root {
  --ink-0: #05080d;
  --ink-1: #070b11;
  --ink-2: #0b121c;
  --ink-3: #11212f;
  --line: #1a2636;
  --line-bright: #24384f;
  --cyan: #5cd2e6;
  --cyan-deep: #34b7cc;
  --cyan-dim: rgba(92, 210, 230, 0.14);
  --bone: #e8eef6;
  --dim: #8593a6;
  --dim-2: #55637a;
  --amber: #d9a04a;
  --good: #59c98d;
  --font-display: "Archivo", "Bahnschrift", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;
  --max: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--ink-1);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--cyan); color: var(--ink-1); }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--bone); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 32px; }

/* ---------- classification-style top strip ---------- */
.strip {
  background: var(--ink-0);
  border-bottom: 1px solid var(--line);
  text-align: center;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ---------- nav ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 11, 17, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 34px; width: 34px; }
.brand .word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.34em;
  color: var(--bone);
}
.brand .by {
  /* parent-company wordmark, styled to match the clydeside-logo lockup */
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: 0.3em;
  color: var(--bone);
  border-left: 1px solid var(--line-bright);
  padding-left: 12px;
  margin-left: 2px;
  text-transform: uppercase;
}
.brand .by i { font-style: normal; color: var(--cyan); }
nav.main { display: flex; align-items: center; gap: 28px; }
nav.main a {
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--dim);
  position: relative;
  padding: 4px 0;
}
nav.main a:not(.cta)::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: var(--cyan);
  transition: right .22s ease;
}
nav.main a:not(.cta):hover::after { right: 0; }
nav.main a:hover { color: var(--bone); }
nav.main a.cta {
  color: var(--ink-1);
  background: var(--cyan);
  padding: 9px 18px;
  border-radius: 3px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
nav.main a.cta:hover { background: var(--bone); color: var(--ink-1); }

/* ---------- section scaffolding ---------- */
section { padding: 104px 0; position: relative; scroll-margin-top: 72px; }
section.tight { padding: 72px 0; }
.rule-top { border-top: 1px solid var(--line); }

img { max-width: 100%; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cyan-deep);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.kicker::before {
  content: "";
  display: block;
  width: 34px;
  height: 1px;
  background: var(--cyan-deep);
}
.kicker .idx { color: var(--dim-2); }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; }

h2 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 760px;
  margin-bottom: 20px;
}
.lede {
  font-size: 18px;
  color: var(--dim);
  max-width: 660px;
  margin-bottom: 48px;
}
.lede strong { color: var(--bone); font-weight: 500; }

/* ---------- hero ---------- */
.hero {
  padding: 120px 0 96px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 900px 480px at 78% -10%, rgba(92, 210, 230, 0.07), transparent 60%),
    var(--ink-1);
}
.hero .wrap { position: relative; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 64px; align-items: center; }
.hero h1 {
  font-size: clamp(40px, 5.6vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 18px 0 26px;
}
.hero h1 em { font-style: normal; color: var(--cyan); }
.hero .sub {
  font-size: 18.5px;
  color: var(--dim);
  max-width: 560px;
  margin-bottom: 40px;
}
.hero .sub strong { color: var(--bone); font-weight: 500; }
.hero-tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan-deep);
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  padding: 15px 26px;
  border-radius: 3px;
  border: 1px solid transparent;
  transition: all .18s ease;
}
.btn.primary { background: var(--cyan); color: var(--ink-1); }
.btn.primary:hover { background: var(--bone); transform: translateY(-1px); }
.btn.ghost { border-color: var(--line-bright); color: var(--bone); }
.btn.ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-1px); }
.hero-note {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dim-2);
  letter-spacing: 0.04em;
}

/* hero instrument figure */
.instrument { position: relative; display: flex; justify-content: center; }
.instrument svg { width: 100%; max-width: 420px; height: auto; }

/* ---------- proof band ---------- */
.proof {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-0);
  padding: 0;
}
.proof .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.proof .cell {
  padding: 34px 28px;
  border-left: 1px solid var(--line);
}
.proof .cell:first-child { border-left: none; padding-left: 0; }
.proof .num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 30px;
  color: var(--cyan);
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.proof .lbl {
  font-size: 13px;
  color: var(--dim);
  margin-top: 6px;
  line-height: 1.45;
}
.proof .src {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--dim-2);
  margin-top: 10px;
  letter-spacing: 0.06em;
}

/* ---------- problem ---------- */
.problem-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.problem-grid .right p { color: var(--dim); margin-bottom: 18px; font-size: 16.5px; }
.problem-grid .right p strong { color: var(--bone); font-weight: 500; }
blockquote.stark {
  border-left: 2px solid var(--cyan);
  padding: 6px 0 6px 26px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.4;
  color: var(--bone);
  margin-top: 34px;
}
blockquote.stark .attr {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim-2);
}

/* ---------- two modes ---------- */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.mode {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 40px 36px;
  position: relative;
}
.mode::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}
.mode.guaranteed::before { background: var(--cyan); }
.mode.assisted::before { background: var(--amber); }
.mode .mode-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.mode.guaranteed .mode-tag { color: var(--cyan); }
.mode.assisted .mode-tag { color: var(--amber); }
.mode h3 { font-size: 24px; margin-bottom: 14px; }
.mode p { color: var(--dim); font-size: 15.5px; margin-bottom: 20px; }
.mode p strong { color: var(--bone); font-weight: 500; }
.mode ul { list-style: none; }
.mode li {
  padding: 11px 0 11px 26px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--dim);
  position: relative;
}
.mode li strong { color: var(--bone); font-weight: 500; }
.mode li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 19px;
  width: 10px;
  height: 1px;
}
.mode.guaranteed li::before { background: var(--cyan); }
.mode.assisted li::before { background: var(--amber); }
.mode .footline {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--dim-2);
  line-height: 1.7;
}

.honesty {
  margin-top: 30px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--cyan-dim);
  padding: 24px 30px;
  font-size: 15.5px;
  color: var(--bone);
  max-width: 100%;
}
.honesty .h-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan);
  display: block;
  margin-bottom: 8px;
}

/* ---------- pipeline ---------- */
.pipeline { border: 1px solid var(--line); background: var(--ink-2); padding: 48px 40px 40px; }
.pipe-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
.pipe-step { position: relative; padding: 0 22px 0 0; }
.pipe-step + .pipe-step { padding-left: 22px; border-left: 1px dashed var(--line-bright); }
.pipe-step .n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-deep);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 10px;
}
.pipe-step h4 { font-family: var(--font-display); font-size: 16px; margin-bottom: 8px; }
.pipe-step p { font-size: 13px; color: var(--dim); line-height: 1.55; }

/* ---------- product showcase ---------- */
.shots-section { background: var(--ink-0); }
.shot {
  margin: 0;
  border: 1px solid var(--line-bright);
  background: var(--ink-2);
  overflow: hidden;
  transition: border-color .25s ease, transform .25s ease;
}
.shot:hover { border-color: var(--cyan-deep); }
.shot-chrome {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--ink-1);
}
.shot-chrome .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--line-bright);
}
.shot-chrome .shot-title {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--dim-2);
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--line);
}
.shot-note {
  padding: 18px 22px;
  font-size: 14px;
  color: var(--dim);
  line-height: 1.6;
}
.shot-note strong { color: var(--bone); font-weight: 500; }
.shot-primary { box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.7); }
.shot-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 28px;
}

/* ---------- sectors ---------- */
.sectors { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.sector { background: var(--ink-1); padding: 40px 38px; transition: background .2s; }
.sector:hover { background: var(--ink-2); }
.sector .s-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim-2);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 16px;
}
.sector h3 { font-size: 21px; margin-bottom: 12px; }
.sector p { font-size: 15px; color: var(--dim); }
.sector p strong { color: var(--bone); font-weight: 500; }

/* ---------- assurance detail ---------- */
.assure-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.assure {
  border-top: 1px solid var(--line-bright);
  padding-top: 24px;
}
.assure h4 { font-family: var(--font-display); font-size: 17px; margin-bottom: 10px; }
.assure p { font-size: 14.5px; color: var(--dim); }
.assure .mono-note {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim-2);
  margin-top: 12px;
  letter-spacing: 0.04em;
}

/* ---------- downloads ---------- */
.dl-section { background: var(--ink-0); }
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.dl-card {
  border: 1px solid var(--line-bright);
  background: var(--ink-2);
  padding: 40px 38px;
}
.dl-card .os {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan-deep);
  margin-bottom: 14px;
}
.dl-card h3 { font-size: 23px; margin-bottom: 10px; }
.dl-card .meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dim);
  margin-bottom: 20px;
}
.dl-card p { font-size: 15px; color: var(--dim); margin-bottom: 26px; }
.dl-card p strong { color: var(--bone); font-weight: 500; }
.sha {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--dim-2);
  word-break: break-all;
  line-height: 1.6;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.sha .k { color: var(--dim); }
.dl-under {
  margin-top: 34px;
  font-size: 14px;
  color: var(--dim);
  max-width: 720px;
}

/* ---------- pricing ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.plan {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color .25s ease, transform .25s ease;
}
.plan:hover { border-color: var(--line-bright); transform: translateY(-3px); }
.plan.featured:hover { border-color: var(--cyan); }
.plan.featured { border-color: var(--cyan-deep); position: relative; }
.plan.featured::before {
  content: "MOST DEPLOYED";
  position: absolute;
  top: -1px; right: -1px;
  background: var(--cyan);
  color: var(--ink-1);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  padding: 5px 12px;
}
.plan .p-name {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 18px;
}
.plan .p-price {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 34px;
  color: var(--bone);
  line-height: 1;
}
.plan .p-price .cur { font-size: 20px; vertical-align: 14px; color: var(--dim); }
.plan .p-per {
  font-size: 12.5px;
  color: var(--dim-2);
  margin: 8px 0 24px;
  font-family: var(--font-mono);
}
.plan ul { list-style: none; flex: 1; }
.plan li {
  font-size: 13.5px;
  color: var(--dim);
  padding: 9px 0 9px 20px;
  border-top: 1px solid var(--line);
  position: relative;
}
.plan li strong { color: var(--bone); font-weight: 500; }
.plan li::before {
  content: "";
  position: absolute;
  left: 0; top: 16px;
  width: 9px; height: 1px;
  background: var(--cyan-deep);
}
.plan .btn { margin-top: 26px; justify-content: center; font-size: 14px; padding: 13px 18px; }
.price-note {
  margin-top: 30px;
  font-size: 13.5px;
  color: var(--dim-2);
  max-width: 760px;
}

/* ---------- contact ---------- */
.contact { text-align: left; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; }
.contact .big {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 1.18;
  margin-bottom: 26px;
}
.contact .big em { font-style: normal; color: var(--cyan); }
.contact-lines { border-top: 1px solid var(--line-bright); }
.contact-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.contact-line .k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--dim-2);
  flex-shrink: 0;
}
.contact-line .v { font-size: 16px; text-align: right; }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--line);
  background: var(--ink-0);
  padding: 44px 0;
}
footer.site .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
footer .f-brand { display: flex; align-items: center; gap: 12px; }
footer .f-brand img { height: 26px; }
footer .f-legal {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--dim-2);
  letter-spacing: 0.06em;
  line-height: 1.8;
  text-align: right;
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
/* gentle stagger inside grids so rows cascade rather than pop */
.reveal:nth-child(2) { transition-delay: .08s; }
.reveal:nth-child(3) { transition-delay: .16s; }
.reveal:nth-child(4) { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .problem-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .instrument { order: -1; }
  .instrument svg { max-width: 280px; }
  .proof .wrap { grid-template-columns: 1fr 1fr; }
  .proof .cell { border-left: none; border-top: 1px solid var(--line); padding-left: 0; }
  .proof .cell:nth-child(-n+2) { border-top: none; }
  .modes, .dl-grid, .shot-duo { grid-template-columns: 1fr; }
  .pipe-row { grid-template-columns: 1fr; gap: 24px; }
  .pipe-step + .pipe-step { border-left: none; border-top: 1px dashed var(--line-bright); padding: 24px 0 0; }
  .pipe-step { padding-right: 0; }
  .assure-grid { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr 1fr; }
  nav.main a:not(.cta) { display: none; }
}
@media (max-width: 620px) {
  .sectors, .price-grid { grid-template-columns: 1fr; }
  section { padding: 72px 0; }
  .wrap { padding: 0 22px; }
  .brand .by { display: none; }
  .brand .word { letter-spacing: 0.22em; }
  body { overflow-x: clip; }
}

/* ---------- the instrument set (Ask / Audit / Author) ---------- */
.band { background: var(--ink-0); }
.insts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.inst {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 38px 34px;
  position: relative;
}
.inst::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}
.inst.ask::before { background: var(--cyan); }
.inst.audit::before { background: var(--amber); }
.inst.author::before { background: var(--good); }
.inst .inst-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.inst.ask .inst-tag { color: var(--cyan); }
.inst.audit .inst-tag { color: var(--amber); }
.inst.author .inst-tag { color: var(--good); }
.inst h3 { font-size: 21px; margin-bottom: 12px; }
.inst p { font-size: 15px; color: var(--dim); }
.inst p strong { color: var(--bone); font-weight: 500; }
.inst .mono-note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--dim-2);
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  letter-spacing: 0.06em;
}
@media (max-width: 980px) {
  .insts { grid-template-columns: 1fr; }
}

/* small-screen header: keep the CTA on one line, clear of the wordmark */
@media (max-width: 620px) {
  nav.main a.cta { padding: 8px 12px; font-size: 12px; white-space: nowrap; }
  .brand img { height: 28px; width: 28px; }
  .brand { gap: 9px; }
}