/* =========================================================
   XiO Technologies Corp — shared stylesheet
   Design language: engineering blueprint / drafting sheet
   ========================================================= */

:root{
  --navy-deep:   #0A1E36;
  --navy:        #10294A;
  --navy-soft:   #163A63;
  --blueline:    #4C8DFF;
  --blueline-dim:#2C5FC4;
  --vellum:      #F3EFE2;
  --vellum-line: #E4DCC8;
  --ink:         #16233A;
  --ink-soft:    #4A5875;
  --redline:     #C8452F;
  --grid-line:   rgba(255,255,255,0.06);
  --grid-line-strong: rgba(255,255,255,0.10);

  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --max-w: 1180px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--vellum);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg{ max-width: 100%; display:block; }

a{ color: inherit; text-decoration: none; }

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

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p{ margin: 0 0 1em; }
p:last-child{ margin-bottom: 0; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before{
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------- focus ---------- */
a:focus-visible, button:focus-visible, .btn:focus-visible{
  outline: 2px solid var(--redline);
  outline-offset: 3px;
  border-radius: 2px;
}

/* =========================================================
   Blueprint / vellum surface treatments
   ========================================================= */
.surface-blueprint{
  background-color: var(--navy);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(var(--grid-line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-strong) 1px, transparent 1px);
  background-size: 16px 16px, 16px 16px, 80px 80px, 80px 80px;
  color: var(--vellum);
}

.surface-vellum{
  background-color: var(--vellum);
  background-image:
    linear-gradient(var(--vellum-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--vellum-line) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--ink);
}

.surface-navy-deep{
  background: var(--navy-deep);
  color: var(--vellum);
}

/* =========================================================
   Buttons
   ========================================================= */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 13px 22px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color .15s ease;
}
.btn:hover{ transform: translateY(-1px); }

.btn-primary{
  background: var(--blueline);
  color: var(--navy-deep);
  border-color: var(--blueline);
}
.btn-primary:hover{ background: #6FA1FF; border-color:#6FA1FF; }

.btn-outline-light{
  border-color: rgba(243,239,226,0.35);
  color: var(--vellum);
  background: transparent;
}
.btn-outline-light:hover{ border-color: var(--vellum); }

.btn-outline-dark{
  border-color: rgba(22,35,58,0.3);
  color: var(--ink);
  background: transparent;
}
.btn-outline-dark:hover{ border-color: var(--ink); }

/* =========================================================
   Header / Nav
   ========================================================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,30,54,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(243,239,226,0.12);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand{
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--vellum);
}
.brand .mark{
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--blueline);
  border: 1px solid var(--blueline);
  padding: 2px 7px;
  border-radius: 2px;
  letter-spacing: 0.02em;
}
.brand .word{
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--vellum);
}
.brand .word small{
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(243,239,226,0.55);
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-links{
  display: flex;
  align-items: center;
  gap: 30px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav-links a{
  color: rgba(243,239,226,0.75);
  padding: 6px 2px;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"]{
  color: var(--vellum);
  border-color: var(--blueline);
}
.nav-links a.nav-cta{
  color: var(--blueline);
}
.nav-toggle{
  display: none;
  background: none;
  border: 1px solid rgba(243,239,226,0.35);
  color: var(--vellum);
  width: 42px;
  height: 38px;
  border-radius: 3px;
  font-family: var(--font-mono);
}

@media (max-width: 860px){
  .nav-links{
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--navy-deep);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    border-bottom: 1px solid rgba(243,239,226,0.12);
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
  }
  .nav-links.open{ max-height: 400px; }
  .nav-links a{
    width: 100%;
    padding: 16px 32px;
    border-bottom: 1px solid rgba(243,239,226,0.08);
  }
  .nav-toggle{ display: block; }
}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  padding: 96px 0 80px;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero h1{
  font-size: clamp(34px, 4.6vw, 56px);
  color: var(--vellum);
  max-width: 15ch;
}
.hero .lede{
  font-size: 17px;
  color: rgba(243,239,226,0.78);
  max-width: 46ch;
  margin-bottom: 34px;
}
.hero .cta-row{
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-eyebrow{ color: rgba(243,239,226,0.65); }

@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
}

/* =========================================================
   Plan-sheet cards (Blueline Suite)
   ========================================================= */
.suite{
  padding: 88px 0 96px;
}
.suite-intro{
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  margin-bottom: 56px;
}
.suite-intro h2{ font-size: clamp(26px, 3.2vw, 38px); color: var(--vellum); }
.suite-intro p{ color: rgba(243,239,226,0.75); font-size: 16px; }

@media (max-width: 780px){
  .suite-intro{ grid-template-columns: 1fr; }
}

.sheet-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(243,239,226,0.14);
  border: 1px solid rgba(243,239,226,0.14);
}
@media (max-width: 900px){
  .sheet-grid{ grid-template-columns: 1fr; }
}

.sheet-card{
  background: var(--navy-deep);
  padding: 32px 28px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 300px;
}
.sheet-num{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(243,239,226,0.45);
  margin-bottom: 22px;
}
.sheet-card h3{
  color: var(--vellum);
  font-size: 21px;
  margin-bottom: 10px;
}
.sheet-card p{
  color: rgba(243,239,226,0.72);
  font-size: 14.5px;
  flex-grow: 1;
}
.status-tag{
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 0;
  margin-top: 18px;
}
.status-dot{
  width: 7px; height: 7px; border-radius: 50%;
  display: inline-block;
}
.status-live .status-dot{ background: var(--blueline); box-shadow: 0 0 0 3px rgba(76,141,255,0.2); }
.status-live{ color: var(--blueline); }
.status-pending .status-dot{ border: 1px solid rgba(243,239,226,0.5); background: transparent; }
.status-pending{ color: rgba(243,239,226,0.55); }

.sheet-card .card-link{
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blueline);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* =========================================================
   Feature / product deep-dive (vellum)
   ========================================================= */
.feature{
  padding: 96px 0;
}
.feature-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 900px){
  .feature-grid{ grid-template-columns: 1fr; }
}
.feature h2{ font-size: clamp(28px, 3.4vw, 42px); }
.feature .lede{ font-size: 17px; color: var(--ink-soft); max-width: 48ch; }

.feature-list{
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.feature-list li{
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 14px;
}
.feature-list .tick{
  font-family: var(--font-mono);
  color: var(--redline);
  font-size: 13px;
  padding-top: 2px;
}
.feature-list strong{
  display: block;
  font-family: var(--font-display);
  font-size: 15.5px;
  margin-bottom: 3px;
}
.feature-list span{
  color: var(--ink-soft);
  font-size: 14.5px;
}

.spec-panel{
  border: 1px solid var(--ink);
  padding: 26px;
  background: rgba(255,255,255,0.4);
}
.spec-panel .eyebrow{ color: var(--redline); }
.spec-row{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--vellum-line);
}
.spec-row:last-of-type{ border-bottom: none; }
.spec-row dt{ color: var(--ink-soft); }
.spec-row dd{ margin: 0; text-align: right; }

/* =========================================================
   About teaser strip
   ========================================================= */
.about-strip{
  padding: 90px 0;
}
.about-strip-grid{
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 860px){
  .about-strip-grid{ grid-template-columns: 1fr; }
}
.about-strip h2{ font-size: clamp(26px, 3vw, 36px); }
.about-strip p{ color: var(--ink-soft); font-size: 16px; max-width: 52ch; }

/* =========================================================
   Generic inner-page hero (About / Terms / Contact)
   ========================================================= */
.page-hero{
  padding: 80px 0 64px;
}
.page-hero h1{
  color: var(--vellum);
  font-size: clamp(32px, 5vw, 50px);
  max-width: 18ch;
}
.page-hero .lede{
  color: rgba(243,239,226,0.75);
  font-size: 16.5px;
  max-width: 50ch;
}

.content-section{
  padding: 72px 0;
}
.content-section + .content-section{
  border-top: 1px solid var(--vellum-line);
}
.content-narrow{
  max-width: 760px;
}
.content-section h2{
  font-size: 24px;
  margin-top: 0;
}
.content-section h2 .num{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--redline);
  margin-right: 10px;
}
.content-section p, .content-section li{
  color: var(--ink-soft);
  font-size: 15.5px;
}
.content-section ul{ padding-left: 20px; }
.content-section li{ margin-bottom: 8px; }

.principle-list{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 8px;
  list-style: none;
  padding: 0;
}
@media (max-width: 780px){
  .principle-list{ grid-template-columns: 1fr; }
}
.principle-list li{
  border-top: 2px solid var(--ink);
  padding-top: 14px;
  color: var(--ink);
}
.principle-list .p-num{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--redline);
  display: block;
  margin-bottom: 8px;
}
.principle-list strong{
  display: block;
  font-family: var(--font-display);
  font-size: 16.5px;
  margin-bottom: 6px;
}
.principle-list span{
  font-size: 14px;
  color: var(--ink-soft);
}

/* =========================================================
   Contact page specifics
   ========================================================= */
.contact-panel{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--vellum-line);
  border: 1px solid var(--vellum-line);
  margin-top: 8px;
}
@media (max-width: 780px){
  .contact-panel{ grid-template-columns: 1fr; }
}
.contact-cell{
  background: var(--vellum);
  padding: 36px 32px;
}
.contact-cell .eyebrow{ color: var(--redline); }
.contact-email{
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 18px;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
}
.contact-email:hover{ color: var(--blueline-dim); border-color: var(--blueline-dim); }
.contact-note{ font-size: 14px; color: var(--ink-soft); }

.contact-meta{
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
}
.contact-meta li{
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px dashed var(--vellum-line);
  color: var(--ink-soft);
}
.contact-meta li span:last-child{ color: var(--ink); text-align: right; }

/* =========================================================
   Terms page
   ========================================================= */
.terms-note{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--redline);
  border: 1px dashed var(--redline);
  padding: 14px 18px;
  margin: 0 0 40px;
  max-width: 760px;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{
  background: var(--navy-deep);
  color: rgba(243,239,226,0.7);
  padding: 56px 0 28px;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(243,239,226,0.12);
}
@media (max-width: 780px){
  .footer-grid{ grid-template-columns: 1fr; gap: 32px; }
}
.footer-brand .word{ color: var(--vellum); font-family: var(--font-display); font-size: 15px; text-transform: uppercase; letter-spacing: .04em; }
.footer-brand p{ font-size: 13.5px; margin-top: 12px; max-width: 34ch; color: rgba(243,239,226,0.6); }

.footer-col h4{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(243,239,226,0.5);
  margin-bottom: 14px;
}
.footer-col ul{ list-style: none; padding: 0; margin: 0; display:flex; flex-direction:column; gap: 10px; }
.footer-col a{
  font-size: 14px;
  color: rgba(243,239,226,0.78);
}
.footer-col a:hover{ color: var(--blueline); }

.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: rgba(243,239,226,0.4);
  flex-wrap: wrap;
  gap: 10px;
}