:root{
  --navy:#1B3A66;
  --navy-2:#234B82;
  --steel:#5B6B85;
  --steel-light:#AEB8C9;
  --paper:#F3F4F1;
  --card:#FFFFFF;
  --ink:#1B2230;
  --alert:#D9531E;
  --alert-dim:#F4E4DB;
  --line:#DBDEE3;
  --cta-bg:#EAF0F8;
  --cta-border:#C9D9EC;
  --radius:2px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
/*body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans',Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}*/
a{color:var(--alert);}
.mono{font-family:'IBM Plex Mono',monospace;}

/* ---------- hero / conduit signature ---------- */
.hero{
  /*background:var(--navy);*/
  background:#004080;
  color:#fff;
  padding:34px 32px 90px;
  position:relative;
  overflow:hidden;
}
.hero-inner{max-width:920px;margin:0 auto;position:relative;z-index:2;}
.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--alert);
  margin:0 0 18px;
}
.headerh1{
  font-size:clamp(30px,4.4vw,46px);
  line-height:1.12;
  margin:0 0 18px;
  font-weight:700;
  letter-spacing:-0.01em;
}
.hero p.lead{
  max-width:600px;
  color:var(--steel-light);
  font-size:17px;
  margin:0 0 6px;
}
.effective{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:22px;
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
  color:#fff;
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.18);
  padding:7px 14px;
  border-radius:20px;
}
/* the conduit: a looping line motif referencing tube/line manufacturing, with a traveling signal pulse */
.conduit {
  position: absolute;
  left: 0; 
  right: 0; 
  bottom: -2px;
  height: 150px;
  z-index: 1;
  pointer-events: none;
}

.conduit svg {
  width: 100%;
  height: 100%;
  display: block;
}

.pulse-line {
  /* Pattern: 1px visible dot, followed by 1260px gap */
  stroke-dasharray: 1 1260;
  stroke-dashoffset: 0;
  animation: travel 5.5s linear infinite;
}

@keyframes travel {
  0% {
    stroke-dashoffset: 0;
  }
  100% {
    /* Negative shift moves the pulse from left to right along the path */
    stroke-dashoffset: -1261;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pulse-line {
    animation: none;
  }
}

/* ---------- layout ---------- */
.layout{
  max-width:1080px;
  margin:-46px auto 0;
  padding:0 32px 100px;
  display:grid;
  grid-template-columns:250px 1fr;
  gap:44px;
  position:relative;
  z-index:3;
}
@media (max-width:860px){
  .layout{grid-template-columns:1fr; margin-top:0; padding-top:36px;}
}

/* ---------- toc ---------- */
.toc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 24px;
}

.toc-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none; /* Hides default marker */
  user-select: none;
}

.toc-summary::-webkit-details-marker {
  display: none; /* Hides default marker in Safari */
}

.toc h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--steel);
  margin: 0;
  font-family: 'IBM Plex Mono', monospace;
}

/* Toggle Arrow Indicator */
.toc-icon {
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.toc-details[open] .toc-icon {
  transform: rotate(-135deg);
}

.toc ol {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  counter-reset: t;
  max-height: 280px;
  overflow-y: auto;
}

.toc li {
  counter-increment: t;
  margin-bottom: 2px;
}

.toc a {
  display: flex;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-size: 13.5px;
  padding: 6px 4px;
  border-radius: 2px;
}

.toc a:hover {
  background: var(--paper);
  color: var(--alert);
}

.toc a::before {
  content: counter(t, decimal-leading-zero);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  color: var(--alert);
  flex-shrink: 0;
}

/* ---------- Desktop (Always Open & Sticky Sidebar) ---------- */
@media (min-width: 992px) {
  .toc {
    padding: 22px 20px;
    align-self: start;
    position: sticky;
    top: 24px;
    max-height: calc(100vh - 48px);
    overflow: hidden;
    margin-bottom: 0;
  }

  /* Disable interactive summary toggling */
  .toc-summary {
    cursor: default;
    pointer-events: none;
  }

  /* Hide toggle icon */
  .toc-icon {
    display: none;
  }

  /* Force list visible even if details tag is closed */
  .toc-details ol {
    display: block !important;
    max-height: calc(100vh - 100px);
  }
}

/* ---------- content ---------- */
.content{min-width:0;}
.doc-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:44px 46px;
}
@media (max-width:600px){ .doc-card{padding:30px 22px;} }
.doc-title{
  font-size:22px;
  font-weight:700;
  margin:0 0 4px;
}
.doc-title-sm{
  font-size:15px;
  font-weight:700;
  margin:0 0 18px;
}
.doc-sub{
  color:var(--steel);
  font-size:13.5px;
  margin:0 0 34px;
  padding-bottom:28px;
  border-bottom:1px solid var(--line);
}
section.clause{margin:0 0 34px;scroll-margin-top:90px;}
section.clause:last-of-type{margin-bottom:0;}
section.clause h2{
  font-size:18px;
  font-weight:700;
  display:flex;
  align-items:baseline;
  gap:10px;
  margin:0 0 12px;
}
section.clause h2 .num{
  font-family:'IBM Plex Mono',monospace;
  color:var(--alert);
  font-size:14px;
}
section.clause h3{
  font-size:14.5px;
  font-weight:600;
  margin:20px 0 8px;
  color:var(--navy-2);
}
section.clause p{margin:0 0 12px;color:#333a48;}
section.clause ul, section.clause ol.legal{margin:0 0 12px;padding-left:22px;color:#333a48;}
section.clause li{margin-bottom:6px;}
.shout{
  font-size:13px;
  background:var(--paper);
  border-left:3px solid var(--steel);
  padding:14px 16px;
  color:#454e5f;
}
.keyword{
  font-family:'IBM Plex Mono',monospace;
  background:var(--alert-dim);
  color:var(--alert);
  padding:1px 6px;
  border-radius:3px;
  font-size:0.92em;
}
.contact-block{
  color:var(--navy-2);
}
hr.rule{border:none;border-top:1px solid var(--line);margin:40px 0;}

/* ---------- exhibits (recreated visuals) ---------- */
.exhibits{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  margin:8px 0 6px;
}
@media (max-width:640px){ .exhibits{grid-template-columns:1fr;} }
figure{margin:0;}
figcaption{
  font-family:'IBM Plex Mono',monospace;
  font-size:11.5px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--steel);
  margin-top:10px;
}

/* phone mock */
.phone{
  background:var(--navy);
  border-radius:22px;
  padding:14px;
  box-shadow:0 14px 30px -14px rgba(14,31,56,0.4);
}
.phone-screen{
  background:#EEF0F3;
  border-radius:12px;
  padding:16px 12px 18px;
  min-height:300px;
  display:flex;
  flex-direction:column;
}
.phone-head{
  text-align:center;
  font-size:11px;
  color:var(--steel);
  font-family:'IBM Plex Mono',monospace;
  margin-bottom:14px;
}
.bubble{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  border-top-left-radius:4px;
  padding:11px 13px;
  font-size:12.5px;
  line-height:1.5;
  max-width:88%;
  margin-bottom:10px;
  color:#222834;
}
.bubble strong{color:var(--navy-2);}
.bubble.out{
  align-self:flex-end;
  background:var(--alert);
  color:#fff;
  border:none;
  border-top-right-radius:4px;
  border-top-left-radius:14px;
}

/* form mock */
.form-mock{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
}
.form-mock .fm-head{
  display:flex;align-items:center;gap:8px;
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  color:var(--alert);
  text-transform:uppercase;
  letter-spacing:0.1em;
  margin-bottom:16px;
}
.fm-head .dot{width:6px;height:6px;background:var(--alert);border-radius:50%;}
.field{margin-bottom:14px;}
.field label{
  display:block;
  font-size:11px;
  color:var(--steel);
  margin-bottom:5px;
  font-family:'IBM Plex Mono',monospace;
}
.field .input{
  border:1px solid var(--line);
  border-radius:3px;
  padding:9px 10px;
  font-size:13px;
  color:#666f80;
  background:#FBFBFA;
}
.field .input.filled{color:var(--ink);}
.check-row{
  display:flex; gap:8px; align-items:flex-start;
  font-size:11.5px; color:#444d5d;
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed var(--line);
}
.check-row .boxsms{
  width:14px;height:14px;
  border:1.5px solid var(--alert);
  border-radius:3px;
  flex-shrink:0;
  margin-top:1px;
  position:relative;
}
.check-row .boxsms::after{
  content:"";
  position:absolute;
  left:3px; top:0.5px;
  width:4px; height:8px;
  border-right:1.5px solid var(--alert);
  border-bottom:1.5px solid var(--alert);
  transform:rotate(40deg);
}
.check-row .boxsms.unchecked{ border-color:var(--steel); }
.check-row .boxsms.unchecked::after{ content:none; }
.btn-mock{
  margin-top:16px;
  background:var(--navy);
  color:#fff;
  text-align:center;
  padding:10px;
  border-radius:3px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:0.02em;
}

/* ---------- CTA sample box (10DLC) ---------- */
.cta-box{
  background:var(--cta-bg);
  border:1px solid var(--cta-border);
  border-left:4px solid var(--navy);
  border-radius:6px;
  padding:20px 22px;
  margin:16px 0 4px;
}
.cta-box .cta-label{
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--navy-2);
  margin-bottom:10px;
}
.cta-box p{color:var(--ink);margin:0;font-size:14px;line-height:1.65;}
.cta-box .links{margin-top:10px;font-size:13px;}
.cta-box .links a{color:var(--navy-2);}
.compliance-note{
  font-size:12.5px;
  color:var(--steel);
  margin-top:10px;
}