@charset "UTF-8";
/* ==========================================================================
   SEAT BELT TRADER — seatbelttrader.in
   Design language: "Trade Floor & Webbing"
   Palette : Warm chalk paper · bitumen ink · olive drab · signal vermilion
   Type    : Sora (display) · Public Sans (text) · DM Mono (technical data)
   Motifs  : webbing weave · tongue-plate slot · 22deg sash · ledger rules
   ========================================================================== */

/* --------------------------------------------------------------------------
   01 · RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img, picture, svg, video { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
p, h1, h2, h3, h4, h5, h6, li { overflow-wrap: break-word; }
ul[class], ol[class] { list-style: none; padding: 0; }
:where(a) { color: inherit; }

/* --------------------------------------------------------------------------
   02 · TOKENS
   -------------------------------------------------------------------------- */
:root{
  /* Light surfaces — warm chalk */
  --chalk:      #F6F3EC;
  --chalk-2:    #EDE8DE;
  --chalk-3:    #E0D9CB;
  --chalk-4:    #CFC6B4;
  --paper:      #FFFDF8;

  /* Dark surfaces — bitumen (warm near-black) */
  --bitumen:    #17130F;
  --bitumen-2:  #221C16;
  --bitumen-3:  #2F2820;
  --bitumen-4:  #443A2F;

  /* Structural mid — olive drab (webbing khaki) */
  --drab:       #414736;
  --drab-2:     #333829;
  --drab-3:     #565E48;
  --drab-4:     #6E7860;

  /* Ink on light */
  --ink:        #17130F;   /* 13.1:1 on chalk */
  --ink-2:      #5B5346;   /*  7.0:1 on chalk */
  --ink-3:      #6E6555;   /*  5.4:1 on chalk */

  /* Ink on dark */
  --inv:        #F2EEE6;   /* 16.0:1 on bitumen */
  --inv-2:      #CFC9B8;   /* 10.6:1 on bitumen · 5.8:1 on drab */
  --inv-3:      #9A9284;   /*  6.0:1 on bitumen */

  /* Signal — vermilion, drawn from the belt release button in the photography */
  --signal:      #D2451C;
  --signal-hi:   #F0703F;  /* 6.2:1 on bitumen — text on dark */
  --signal-deep: #A33409;  /* 6.2:1 on chalk   — text on light */
  --signal-wash: rgba(210, 69, 28, .10);
  --signal-line: rgba(210, 69, 28, .32);

  /* Brass — hairline metal, decorative only, never text */
  --brass:      #9A7A3E;
  --brass-line: rgba(154, 122, 62, .38);

  /* Hairlines */
  --line-l:   rgba(23, 19, 15, .14);
  --line-l-2: rgba(23, 19, 15, .26);
  --line-l-3: rgba(23, 19, 15, .40);
  --line-d:   rgba(242, 238, 230, .15);
  --line-d-2: rgba(242, 238, 230, .30);

  /* Type families */
  --f-display: "Sora", "Segoe UI", -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
  --f-text:    "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --f-mono:    "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* Type scale — fluid */
  --fs-mega: clamp(2.75rem, 6.6vw, 5.75rem);
  --fs-h1:   clamp(2.15rem, 4.9vw, 3.95rem);
  --fs-h2:   clamp(1.72rem, 3.1vw, 2.75rem);
  --fs-h3:   clamp(1.22rem, 1.5vw, 1.55rem);
  --fs-h4:   clamp(1.05rem, .9vw, 1.18rem);
  --fs-lead: clamp(1.06rem, 1.15vw, 1.24rem);
  --fs-body: 1.0625rem;
  --fs-sm:   .935rem;
  --fs-xs:   .8125rem;
  --fs-mono: .78rem;

  /* Rhythm */
  --shell:  1290px;
  --narrow: 800px;
  --gut:    clamp(1.15rem, 4vw, 2.6rem);
  --sec:    clamp(4rem, 8.5vw, 7.5rem);
  --sec-sm: clamp(2.75rem, 5.5vw, 4.5rem);

  /* Motion */
  --ease: cubic-bezier(.22, .61, .36, 1);

  /* Elevation */
  --lift-1: 0 1px 2px rgba(23,19,15,.05), 0 6px 18px rgba(23,19,15,.06);
  --lift-2: 0 2px 4px rgba(23,19,15,.06), 0 16px 40px rgba(23,19,15,.11);
}

/* --------------------------------------------------------------------------
   03 · BASE
   -------------------------------------------------------------------------- */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){ html { scroll-behavior: auto; } }

body{
  font-family: var(--f-text);
  font-size: var(--fs-body);
  line-height: 1.68;
  color: var(--ink);
  background: var(--chalk);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5{
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.022em;
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: 1.22; letter-spacing: -.014em; }
h4 { font-size: var(--fs-h4); line-height: 1.3;  letter-spacing: -.01em; }

p { text-wrap: pretty; }
strong { font-weight: 650; color: var(--ink); }

a { color: var(--signal-deep); text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }

::selection { background: var(--signal); color: #fff; }

:focus-visible{
  outline: 2px solid var(--signal-deep);
  outline-offset: 3px;
  border-radius: 2px;
}
.band-drab :focus-visible, .band-ink :focus-visible, .drawer :focus-visible{
  outline-color: var(--signal-hi);
}

.skip{
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--bitumen); color: var(--inv);
  padding: .8rem 1.2rem; font-family: var(--f-mono); font-size: var(--fs-xs);
}
.skip:focus { left: .5rem; top: .5rem; }

.sr-only{
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* --------------------------------------------------------------------------
   04 · LAYOUT PRIMITIVES
   -------------------------------------------------------------------------- */
.shell{ width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--gut); }
.shell-narrow{ width: 100%; max-width: var(--narrow); margin-inline: auto; padding-inline: var(--gut); }

section { position: relative; }
.sec  { padding-block: var(--sec); }
.sec-sm { padding-block: var(--sec-sm); }

.band-chalk { background: var(--chalk); }
.band-chalk2{ background: var(--chalk-2); }
.band-paper { background: var(--paper); }
.band-ink   { background: var(--bitumen); color: var(--inv); }
.band-drab  { background: var(--drab);    color: var(--inv); }
.band-ink h1, .band-ink h2, .band-ink h3, .band-ink h4,
.band-drab h1, .band-drab h2, .band-drab h3, .band-drab h4 { color: var(--inv); }
.band-ink p, .band-drab p { color: var(--inv-2); }
.band-ink a, .band-drab a { color: var(--signal-hi); }
.band-ink strong, .band-drab strong { color: var(--inv); }

/* Content measure helpers */
.lead{ font-size: var(--fs-lead); line-height: 1.6; color: var(--ink-2); }
.band-ink .lead, .band-drab .lead{ color: var(--inv-2); }
.measure  { max-width: 66ch; }
.measure-s{ max-width: 54ch; }
.prose > * + *{ margin-top: 1.15rem; }
.prose h3{ margin-top: 2.4rem; }
.prose h4{ margin-top: 1.9rem; }
.prose > h3:first-child, .prose > h4:first-child{ margin-top: 0; }

/* --------------------------------------------------------------------------
   05 · TEXTURE & MOTIFS
   -------------------------------------------------------------------------- */

/* Webbing weave — signature texture, echoes seat-belt strap fabric */
.weave{ position: relative; }
.weave::before{
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--line-l) 0 1px, transparent 1px 7px),
    repeating-linear-gradient(0deg,  var(--line-l) 0 1px, transparent 1px 7px);
  opacity: .5;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.55), transparent 62%);
          mask-image: linear-gradient(180deg, rgba(0,0,0,.55), transparent 62%);
}
.band-ink.weave::before, .band-drab.weave::before{
  background-image:
    repeating-linear-gradient(90deg, var(--line-d) 0 1px, transparent 1px 7px),
    repeating-linear-gradient(0deg,  var(--line-d) 0 1px, transparent 1px 7px);
}

/* Precision grid — technical drafting field */
.grid-field{ position: relative; }
.grid-field::before{
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(90deg, var(--line-l) 1px, transparent 1px),
    linear-gradient(0deg,  var(--line-l) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: .55;
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 0%, rgba(0,0,0,.9), transparent 72%);
          mask-image: radial-gradient(ellipse 78% 62% at 50% 0%, rgba(0,0,0,.9), transparent 72%);
}
.band-ink.grid-field::before, .band-drab.grid-field::before{
  background-image:
    linear-gradient(90deg, var(--line-d) 1px, transparent 1px),
    linear-gradient(0deg,  var(--line-d) 1px, transparent 1px);
}

/* 22deg sash — the diagonal a shoulder belt makes across the torso */
.sash{ position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.sash i{
  position: absolute; top: -35%; bottom: -35%; width: clamp(30px, 5.2vw, 74px);
  transform: rotate(22deg); transform-origin: center;
  background: var(--signal); opacity: .085;
}
.sash i + i{ background: var(--drab); opacity: .07; }

/* Eyebrow — technical label */
.eyebrow{
  display: inline-flex; align-items: center; gap: .62rem;
  font-family: var(--f-mono); font-size: var(--fs-mono);
  letter-spacing: .17em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 1.15rem;
}
.eyebrow::before{
  content: ""; width: 20px; height: 3px; background: var(--signal); flex: none;
}
.band-ink .eyebrow, .band-drab .eyebrow{ color: var(--chalk-3); }

/* Ledger numeral */
.idx{
  font-family: var(--f-mono); font-size: var(--fs-mono);
  color: var(--signal-deep); letter-spacing: .1em;
}
.band-ink .idx, .band-drab .idx{ color: var(--signal-hi); }

.rule{ height: 1px; background: var(--line-l); border: 0; }
.rule-heavy{ height: 3px; background: var(--signal); border: 0; width: 54px; }
.band-ink .rule, .band-drab .rule{ background: var(--line-d); }

/* --------------------------------------------------------------------------
   06 · HEADER / NAVIGATION
   -------------------------------------------------------------------------- */
.masthead{
  position: sticky; top: 0; z-index: 100;
  background: rgba(246, 243, 236, .92);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
          backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-l);
  transition: box-shadow .3s var(--ease);
}
.masthead.is-stuck{ box-shadow: 0 1px 0 var(--line-l-2), 0 10px 30px rgba(23,19,15,.07); }

.masthead-in{
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.2rem; min-height: 74px;
}

.brand{ display: inline-flex; align-items: center; gap: .72rem; text-decoration: none; color: var(--ink); flex: none; }
.brand-mark{ width: 38px; height: 38px; flex: none; }
.brand-text{ display: flex; flex-direction: column; line-height: 1; }
.brand-name{
  font-family: var(--f-display); font-weight: 700; font-size: 1.02rem;
  letter-spacing: -.015em; text-transform: uppercase; white-space: nowrap;
}
.brand-sub{
  font-family: var(--f-mono); font-size: .6rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ink-3); margin-top: .32rem; white-space: nowrap;
}

.nav{ display: flex; align-items: center; gap: clamp(.35rem, 1vw, .95rem); }
.nav a{
  position: relative; text-decoration: none; color: var(--ink-2);
  font-size: .855rem; font-weight: 550; letter-spacing: -.005em;
  padding: .55rem .16rem; white-space: nowrap;
  transition: color .22s var(--ease);
}
.nav a::after{
  content: ""; position: absolute; left: 0; right: 0; bottom: .2rem; height: 2px;
  background: var(--signal); transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover{ color: var(--ink); }
.nav a:hover::after{ transform: scaleX(1); }
.nav a[aria-current="page"]{ color: var(--ink); font-weight: 650; }
.nav a[aria-current="page"]::after{ transform: scaleX(1); }

.masthead-cta{ flex: none; }

/* Burger */
.burger{
  display: none; width: 46px; height: 46px; flex: none;
  background: transparent; border: 1px solid var(--line-l-2); border-radius: 3px;
  cursor: pointer; padding: 0;
}
.burger span{
  display: block; width: 20px; height: 2px; background: var(--ink);
  margin: 3.5px auto; transition: transform .32s var(--ease), opacity .2s var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1){ transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3){ transform: translateY(-5.5px) rotate(-45deg); }

/* Mobile drawer */
.drawer{
  position: fixed; inset: 0; z-index: 99;
  background: var(--bitumen); color: var(--inv);
  padding: calc(74px + 1.6rem) var(--gut) 2.4rem;
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  opacity: 0; visibility: hidden; transform: translateY(-10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}
.drawer.is-open{ opacity: 1; visibility: visible; transform: none; }
.drawer nav{ display: flex; flex-direction: column; }
.drawer nav a{
  display: flex; align-items: baseline; gap: .9rem;
  padding: 1rem 0; text-decoration: none; color: var(--inv);
  font-family: var(--f-display); font-size: 1.3rem; font-weight: 650;
  letter-spacing: -.02em; border-bottom: 1px solid var(--line-d);
}
.drawer nav a span{ font-family: var(--f-mono); font-size: .7rem; color: var(--inv-3); letter-spacing: .1em; }
.drawer nav a[aria-current="page"]{ color: var(--signal-hi); }
.drawer nav a[aria-current="page"] span{ color: var(--signal-hi); }
.drawer-foot{ margin-top: 2rem; display: grid; gap: .75rem; }
.drawer-foot a{
  font-family: var(--f-mono); font-size: var(--fs-sm); color: var(--inv-2);
  text-decoration: none; display: flex; align-items: center; gap: .6rem;
}
.drawer-foot a:hover{ color: var(--signal-hi); }
.drawer-foot svg{ width: 15px; height: 15px; flex: none; color: var(--signal-hi); }
body.nav-open{ overflow: hidden; }

/* --------------------------------------------------------------------------
   07 · BUTTONS & LINKS
   -------------------------------------------------------------------------- */
.btn{
  display: inline-flex; align-items: center; justify-content: center; gap: .6rem;
  font-family: var(--f-text); font-size: .9rem; font-weight: 650; letter-spacing: -.005em;
  padding: .88rem 1.5rem; border: 1px solid transparent; border-radius: 2px;
  text-decoration: none; cursor: pointer; text-align: center;
  transition: background .24s var(--ease), color .24s var(--ease),
              border-color .24s var(--ease), transform .24s var(--ease);
}
.btn svg{ width: 15px; height: 15px; flex: none; transition: transform .28s var(--ease); }
.btn:hover svg{ transform: translateX(3px); }

.btn-primary{ background: var(--signal); color: #fff; }
.btn-primary:hover{ background: #B93A15; transform: translateY(-2px); }

.btn-ink{ background: var(--bitumen); color: var(--inv); }
.btn-ink:hover{ background: var(--bitumen-3); transform: translateY(-2px); }

.btn-outline{ background: transparent; color: var(--ink); border-color: var(--line-l-3); }
.btn-outline:hover{ border-color: var(--bitumen); background: var(--bitumen); color: var(--inv); transform: translateY(-2px); }

.btn-ghost-inv{ background: transparent; color: var(--inv); border-color: var(--line-d-2); }
.btn-ghost-inv:hover{ background: var(--inv); color: var(--bitumen); border-color: var(--inv); transform: translateY(-2px); }

.btn-sm{ padding: .62rem 1.05rem; font-size: .82rem; }
.btn-row{ display: flex; flex-wrap: wrap; gap: .8rem; }

.tlink{
  display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 650; font-size: .9rem; text-decoration: none;
  color: var(--signal-deep); position: relative; padding-bottom: 2px;
}
.tlink::after{
  content: ""; position: absolute; left: 0; bottom: -1px; width: 100%; height: 1.5px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform .34s var(--ease);
}
.tlink:hover::after{ transform: scaleX(1); transform-origin: left; }
.tlink svg{ width: 14px; height: 14px; transition: transform .28s var(--ease); }
.tlink:hover svg{ transform: translateX(3px); }
.band-ink .tlink, .band-drab .tlink{ color: var(--signal-hi); }

/* --------------------------------------------------------------------------
   08 · MEDIA FRAMES — no important subject is ever cropped
   -------------------------------------------------------------------------- */
.fig{ position: relative; margin: 0; }

/* Every frame carries the source image's own aspect ratio via an inline
   style, so the picture is shown whole. `contain` is the default. */
.fig-box{
  position: relative; overflow: hidden;
  background: var(--chalk-3);
  border: 1px solid var(--line-l);
  border-radius: 3px;
}
.band-ink .fig-box, .band-drab .fig-box{ background: var(--bitumen-3); border-color: var(--line-d); }

.fig-box img{
  width: 100%; height: 100%;
  object-fit: contain;
  object-position: center;
}
/* Opt-in cover — used only where the container ratio equals the file's own
   ratio, so nothing is actually cut off. */
.fig-box--cover img{ object-fit: cover; }

.fig-cap{
  display: flex; gap: .6rem; align-items: baseline;
  margin-top: .78rem; font-family: var(--f-mono); font-size: var(--fs-mono);
  color: var(--ink-3); letter-spacing: .04em; line-height: 1.5;
}
.fig-cap b{ color: var(--signal-deep); font-weight: 400; flex: none; }
.band-ink .fig-cap, .band-drab .fig-cap{ color: var(--inv-3); }
.band-ink .fig-cap b, .band-drab .fig-cap b{ color: var(--signal-hi); }

.fig-tick{ position: absolute; width: 13px; height: 13px; border: 1.5px solid var(--signal); opacity: .85; z-index: 2; }
.fig-tick.tl{ top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.fig-tick.br{ bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.fig-zoom img{ transition: transform .7s var(--ease); }
.fig-zoom:hover img{ transform: scale(1.03); }

/* --------------------------------------------------------------------------
   09 · HOME · HERO
   -------------------------------------------------------------------------- */
.hero{
  position: relative; overflow: hidden;
  background: var(--bitumen); color: var(--inv);
  padding-block: clamp(3rem, 7vw, 5.5rem) clamp(3rem, 7vw, 5rem);
}
.hero .shell{ position: relative; z-index: 2; }
.hero-grid{
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: clamp(2rem, 4.5vw, 4.2rem); align-items: center;
}
.hero-mega{
  font-size: var(--fs-mega); font-weight: 800; line-height: .98;
  letter-spacing: -.035em; color: var(--inv);
}
.hero-mega em{ font-style: normal; color: var(--signal-hi); }
.hero-lead{
  margin-top: 1.5rem; font-size: var(--fs-lead); line-height: 1.62;
  color: var(--inv-2); max-width: 50ch;
}
.hero .btn-row{ margin-top: 2.1rem; }

/* Ledger strip beneath the hero copy */
.hero-ledger{
  margin-top: 2.6rem; padding-top: 1.5rem; border-top: 1px solid var(--line-d);
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.4rem;
}
.hero-ledger div{ min-width: 0; }
.hero-ledger dt{
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .13em;
  text-transform: uppercase; color: var(--signal-hi); margin-bottom: .45rem;
}
.hero-ledger dd{ margin: 0; font-size: var(--fs-sm); color: var(--inv-2); line-height: 1.5; }

.hero-media{ position: relative; }
.hero-media .fig-box{ background: var(--bitumen-2); }
.hero-plate{
  position: absolute; left: -1px; bottom: clamp(-14px, -1.4vw, -10px);
  background: var(--signal); color: #fff;
  font-family: var(--f-mono); font-size: var(--fs-mono);
  letter-spacing: .14em; text-transform: uppercase;
  padding: .58rem 1rem; z-index: 3;
}

/* --------------------------------------------------------------------------
   10 · HOME · RESTRAINT PRINCIPLE (asymmetric stepped panels)
   -------------------------------------------------------------------------- */
.principle{ display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(1.2rem, 2.6vw, 2.2rem); }
.principle-head{ grid-column: 1 / span 5; }
.principle-body{ grid-column: 7 / span 6; }
.principle-media{ grid-column: 1 / span 12; margin-top: clamp(1.6rem, 3vw, 2.6rem); }

.step-stack{ display: grid; gap: 0; margin-top: 2rem; }
.step{
  display: grid; grid-template-columns: auto 1fr; gap: 1.15rem;
  padding: 1.5rem 0; border-top: 1px solid var(--line-l);
  transition: padding-left .35s var(--ease);
}
.step:last-child{ border-bottom: 1px solid var(--line-l); }
.step:hover{ padding-left: .7rem; }
.step-n{
  font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--signal-deep);
  letter-spacing: .1em; padding-top: .28rem; flex: none;
}
.step h3{ margin-bottom: .5rem; }
.step p{ color: var(--ink-2); font-size: var(--fs-sm); }

/* --------------------------------------------------------------------------
   11 · PRODUCT CATEGORY RAIL (horizontal technical panels)
   -------------------------------------------------------------------------- */
.rail{ display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0; margin-top: 3rem; }
.rail-item{
  position: relative; padding: clamp(1.6rem, 2.6vw, 2.2rem) clamp(1.2rem, 2vw, 1.7rem);
  border-left: 1px solid var(--line-d);
  transition: background .3s var(--ease);
}
.rail-item:last-child{ border-right: 1px solid var(--line-d); }
.rail-item:hover{ background: rgba(242,238,230,.05); }
.rail-item::before{
  content: ""; position: absolute; top: 0; left: -1px; width: 3px; height: 0;
  background: var(--signal); transition: height .4s var(--ease);
}
.rail-item:hover::before{ height: 100%; }
.rail-n{
  font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--signal-hi);
  letter-spacing: .12em; display: block; margin-bottom: 1.4rem;
}
.rail-item h3{ margin-bottom: .7rem; font-size: 1.16rem; }
.rail-item p{ font-size: var(--fs-sm); color: var(--inv-2); line-height: 1.6; }

/* --------------------------------------------------------------------------
   12 · APPLICATIONS — asymmetric offset grid
   -------------------------------------------------------------------------- */
.appgrid{ display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(1rem, 2.2vw, 1.9rem); margin-top: 3rem; }
.appcard{
  position: relative; background: var(--paper); border: 1px solid var(--line-l);
  padding: clamp(1.5rem, 2.4vw, 2rem); border-radius: 3px;
  transition: transform .38s var(--ease), box-shadow .38s var(--ease), border-color .38s var(--ease);
}
.appcard:hover{ transform: translateY(-5px); box-shadow: var(--lift-2); border-color: var(--line-l-2); }
.appcard-mark{
  width: 40px; height: 40px; display: grid; place-items: center;
  background: var(--signal-wash); border: 1px solid var(--signal-line);
  color: var(--signal-deep); margin-bottom: 1.35rem; border-radius: 2px;
}
.appcard-mark svg{ width: 20px; height: 20px; }
.appcard h3{ margin-bottom: .6rem; }
.appcard p{ font-size: var(--fs-sm); color: var(--ink-2); }
.appcard-tag{
  margin-top: 1.15rem; padding-top: .95rem; border-top: 1px solid var(--line-l);
  font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--ink-3); letter-spacing: .07em;
}
/* offsets create the asymmetry */
.appcard.c-a{ grid-column: 1 / span 5; }
.appcard.c-b{ grid-column: 6 / span 7; }
.appcard.c-c{ grid-column: 1 / span 7; }
.appcard.c-d{ grid-column: 8 / span 5; }
.appcard.c-e{ grid-column: 1 / span 6; }
.appcard.c-f{ grid-column: 7 / span 6; }

/* --------------------------------------------------------------------------
   13 · SELECTION FACTORS — spec table
   -------------------------------------------------------------------------- */
.spec{ margin-top: 2.8rem; border-top: 2px solid var(--bitumen); }
.spec-row{
  display: grid; grid-template-columns: 3.2rem minmax(150px, .8fr) 2fr;
  gap: clamp(.9rem, 2vw, 2rem); align-items: start;
  padding: 1.5rem 0; border-bottom: 1px solid var(--line-l);
  transition: background .3s var(--ease);
}
.spec-row:hover{ background: rgba(23,19,15,.022); }
.spec-n{ font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--signal-deep); letter-spacing: .1em; padding-top: .3rem; }
.spec-k{ font-family: var(--f-display); font-weight: 650; font-size: 1.04rem; letter-spacing: -.012em; line-height: 1.34; }
.spec-v{ font-size: var(--fs-sm); color: var(--ink-2); }
.band-ink .spec{ border-top-color: var(--inv); }
.band-ink .spec-row{ border-bottom-color: var(--line-d); }
.band-ink .spec-row:hover{ background: rgba(242,238,230,.04); }
.band-ink .spec-n{ color: var(--signal-hi); }
.band-ink .spec-k{ color: var(--inv); }
.band-ink .spec-v{ color: var(--inv-2); }

/* --------------------------------------------------------------------------
   14 · VALUE PILLARS — bordered ledger blocks
   -------------------------------------------------------------------------- */
.pillars{ display: grid; grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); gap: clamp(1rem, 2vw, 1.6rem); margin-top: 3rem; }
.pillar{
  position: relative; padding: clamp(1.5rem, 2.3vw, 1.95rem);
  background: var(--chalk-2); border: 1px solid var(--line-l); border-radius: 3px;
  transition: background .32s var(--ease), transform .32s var(--ease);
}
.pillar:hover{ background: var(--paper); transform: translateY(-4px); box-shadow: var(--lift-1); }
.pillar-n{
  font-family: var(--f-mono); font-size: 2.1rem; font-weight: 300;
  color: var(--chalk-4); line-height: 1; display: block; margin-bottom: 1.1rem;
  transition: color .32s var(--ease);
}
.pillar:hover .pillar-n{ color: var(--signal); }
.pillar h3{ font-size: 1.1rem; margin-bottom: .6rem; }
.pillar p{ font-size: var(--fs-sm); color: var(--ink-2); }

/* --------------------------------------------------------------------------
   15 · EDITORIAL SPLIT (image + copy, alternating)
   -------------------------------------------------------------------------- */
.split{
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(1.8rem, 4vw, 4rem); align-items: center;
}
.split--reverse .split-media{ order: 2; }
.split-copy h2{ margin-bottom: 1.15rem; }
.split-copy p + p{ margin-top: 1.05rem; }
.split-copy .btn-row, .split-copy .tlink{ margin-top: 1.8rem; }

/* Marker list */
.mlist{ margin-top: 1.7rem; display: grid; gap: .85rem; }
.mlist li{ display: grid; grid-template-columns: auto 1fr; gap: .85rem; font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.6; }
.mlist li::before{
  content: ""; width: 9px; height: 9px; margin-top: .52rem; flex: none;
  background: var(--signal); border-radius: 1px;
}
.band-ink .mlist li, .band-drab .mlist li{ color: var(--inv-2); }

/* --------------------------------------------------------------------------
   16 · GUIDE PREVIEW — index cards
   -------------------------------------------------------------------------- */
.guidegrid{ display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: clamp(1rem, 2vw, 1.5rem); margin-top: 2.8rem; }
.guidecard{
  display: block; text-decoration: none; color: inherit;
  padding: clamp(1.4rem, 2.2vw, 1.8rem);
  background: var(--paper); border: 1px solid var(--line-l); border-radius: 3px;
  transition: transform .34s var(--ease), box-shadow .34s var(--ease);
}
.guidecard:hover{ transform: translateY(-4px); box-shadow: var(--lift-2); }
.guidecard .idx{ display: block; margin-bottom: 1rem; }
.guidecard h3{ font-size: 1.08rem; margin-bottom: .55rem; }
.guidecard p{ font-size: var(--fs-sm); color: var(--ink-2); }
.guidecard-go{
  margin-top: 1.2rem; display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .1em;
  text-transform: uppercase; color: var(--signal-deep);
}
.guidecard-go svg{ width: 13px; height: 13px; transition: transform .28s var(--ease); }
.guidecard:hover .guidecard-go svg{ transform: translateX(4px); }

/* --------------------------------------------------------------------------
   17 · ACCORDION (FAQ)
   -------------------------------------------------------------------------- */
.acc{ margin-top: 2.6rem; border-top: 1px solid var(--line-l-2); }
.acc-item{ border-bottom: 1px solid var(--line-l); }
.acc-btn{
  width: 100%; display: grid; grid-template-columns: auto 1fr auto; gap: 1rem;
  align-items: start; text-align: left; background: transparent; border: 0;
  padding: 1.45rem .2rem; cursor: pointer; color: var(--ink);
  font-family: var(--f-display); font-weight: 650; font-size: 1.04rem;
  letter-spacing: -.012em; line-height: 1.4;
  transition: color .24s var(--ease);
}
.acc-btn:hover{ color: var(--signal-deep); }
.acc-btn .idx{ padding-top: .3rem; }
.acc-sign{
  position: relative; width: 20px; height: 20px; margin-top: .22rem; flex: none;
}
.acc-sign::before, .acc-sign::after{
  content: ""; position: absolute; left: 50%; top: 50%; background: var(--signal);
  transform: translate(-50%, -50%); transition: transform .32s var(--ease), opacity .24s var(--ease);
}
.acc-sign::before{ width: 15px; height: 2px; }
.acc-sign::after { width: 2px;  height: 15px; }
.acc-btn[aria-expanded="true"] .acc-sign::after{ transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }
/* No default height here on purpose. The collapsed state is applied by
   main.js as an inline style, so if the script never runs every answer
   simply renders open and readable instead of being trapped at zero. */
.acc-panel{
  overflow: hidden;
  transition: height .38s var(--ease);
}
.acc-panel-in{ padding: 0 .2rem 1.6rem 3.2rem; }
.acc-panel-in p{ font-size: var(--fs-sm); color: var(--ink-2); max-width: 68ch; }
.acc-panel-in p + p{ margin-top: .85rem; }

/* --------------------------------------------------------------------------
   18 · CTA BAND
   -------------------------------------------------------------------------- */
.cta{ position: relative; overflow: hidden; background: var(--bitumen); color: var(--inv); }
.cta-in{
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(1.8rem, 4vw, 3.5rem);
  align-items: center; padding-block: clamp(3.4rem, 7vw, 6rem);
}
.cta h2{ font-size: clamp(1.9rem, 3.6vw, 3.1rem); letter-spacing: -.03em; }
.cta p{ margin-top: 1.1rem; color: var(--inv-2); max-width: 52ch; }
.cta-side{ display: grid; gap: 1rem; align-content: center; }
.cta-line{
  display: flex; align-items: center; gap: .85rem; padding: 1rem 0;
  border-bottom: 1px solid var(--line-d); text-decoration: none; color: var(--inv);
  font-family: var(--f-mono); font-size: var(--fs-sm); letter-spacing: .02em;
  transition: color .24s var(--ease), padding-left .3s var(--ease);
}
.cta-line:hover{ color: var(--signal-hi); padding-left: .5rem; }
.cta-line svg{ width: 17px; height: 17px; flex: none; color: var(--signal-hi); }

/* --------------------------------------------------------------------------
   19 · PAGE HEAD (inner pages)
   -------------------------------------------------------------------------- */
.phead{
  position: relative; overflow: hidden;
  background: var(--bitumen); color: var(--inv);
  padding-block: clamp(3rem, 6.5vw, 5.2rem) clamp(2.6rem, 5.5vw, 4.4rem);
}
.phead .shell{ position: relative; z-index: 2; }
.crumb{
  display: flex; flex-wrap: wrap; align-items: center; gap: .55rem;
  font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--inv-3);
  letter-spacing: .08em; margin-bottom: 1.7rem;
}
.crumb a{ color: var(--inv-3); text-decoration: none; }
.crumb a:hover{ color: var(--signal-hi); }
.crumb span[aria-current]{ color: var(--inv); }
.crumb i{ font-style: normal; color: var(--signal-hi); }
.phead h1{ max-width: 20ch; color: var(--inv); }
.phead-lead{ margin-top: 1.4rem; font-size: var(--fs-lead); color: var(--inv-2); max-width: 62ch; line-height: 1.6; }

/* In-page jump chips */
.jump{ display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 2.2rem; }
.jump a{
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .08em;
  text-transform: uppercase; text-decoration: none; color: var(--inv-2);
  border: 1px solid var(--line-d-2); border-radius: 2px; padding: .5rem .85rem;
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.jump a:hover{ background: var(--signal); border-color: var(--signal); color: #fff; }

/* --------------------------------------------------------------------------
   20 · CONTENT BLOCKS FOR INNER PAGES
   -------------------------------------------------------------------------- */
/* Two-column editorial with sticky side rail */
.railed{ display: grid; grid-template-columns: minmax(0, 260px) minmax(0, 1fr); gap: clamp(1.8rem, 4vw, 4rem); align-items: start; }
.railed-side{ position: sticky; top: 100px; }
.railed-side h2{ font-size: clamp(1.5rem, 2.3vw, 2rem); }
.railed-side p{ margin-top: 1rem; font-size: var(--fs-sm); color: var(--ink-2); }

/* Deep content article */
.article h2{ margin-bottom: 1.1rem; }
.article h3{ margin-top: 2.6rem; margin-bottom: .8rem; }
.article h4{ margin-top: 2rem; margin-bottom: .6rem; }
.article p{ color: var(--ink-2); }
.article p + p{ margin-top: 1.05rem; }
.article ul{ margin-top: 1.1rem; display: grid; gap: .8rem; }
.article ul li{ display: grid; grid-template-columns: auto 1fr; gap: .8rem; color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.62; }
.article ul li::before{ content: ""; width: 8px; height: 8px; margin-top: .5rem; background: var(--signal); border-radius: 1px; }
.article > * + section{ margin-top: clamp(2.6rem, 5vw, 4rem); }

/* Callout panel */
.callout{
  margin-top: 1.9rem; padding: clamp(1.3rem, 2.2vw, 1.8rem);
  background: var(--chalk-2); border-left: 3px solid var(--signal); border-radius: 0 3px 3px 0;
}
.callout p{ font-size: var(--fs-sm); color: var(--ink-2); }
.callout-k{
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .14em;
  text-transform: uppercase; color: var(--signal-deep); display: block; margin-bottom: .6rem;
}

/* Definition ledger */
.deflist{ margin-top: 2rem; border-top: 1px solid var(--line-l-2); }
.deflist > div{
  display: grid; grid-template-columns: minmax(140px, .55fr) 1.45fr;
  gap: clamp(.8rem, 2vw, 1.8rem); padding: 1.3rem 0; border-bottom: 1px solid var(--line-l);
}
.deflist dt{ font-family: var(--f-display); font-weight: 650; font-size: 1rem; letter-spacing: -.01em; line-height: 1.35; }
.deflist dd{ margin: 0; font-size: var(--fs-sm); color: var(--ink-2); }

/* Numbered feature panels (drab band) */
.panels{ display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1px; margin-top: 3rem; background: var(--line-d); border: 1px solid var(--line-d); }
.panel{ background: var(--drab); padding: clamp(1.5rem, 2.4vw, 2rem); transition: background .3s var(--ease); }
.panel:hover{ background: var(--drab-2); }
.panel-n{ font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--signal-hi); letter-spacing: .12em; display: block; margin-bottom: 1.2rem; }
.panel h3{ font-size: 1.08rem; margin-bottom: .6rem; color: var(--inv); }
.panel p{ font-size: var(--fs-sm); color: var(--inv-2); }

/* Checklist grid */
.checks{ display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: clamp(1rem, 2vw, 1.6rem); margin-top: 2.4rem; }
.check{
  display: grid; grid-template-columns: auto 1fr; gap: .95rem; align-items: start;
  padding: 1.25rem; background: var(--paper); border: 1px solid var(--line-l); border-radius: 3px;
}
.check-mk{
  width: 26px; height: 26px; display: grid; place-items: center; flex: none;
  background: var(--bitumen); color: var(--signal-hi); border-radius: 2px;
}
.check-mk svg{ width: 13px; height: 13px; }
.check h3{ font-size: 1.02rem; line-height: 1.32; letter-spacing: -.01em; margin-bottom: .35rem; }
.check p{ font-size: var(--fs-sm); color: var(--ink-2); }

/* --------------------------------------------------------------------------
   21 · CONTACT
   -------------------------------------------------------------------------- */
.contact-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 4.5vw, 4.2rem); align-items: start; }

.ccard{
  background: var(--bitumen); color: var(--inv); border-radius: 3px;
  padding: clamp(1.7rem, 3vw, 2.5rem); position: relative; overflow: hidden;
}
.ccard h2{ color: var(--inv); font-size: clamp(1.5rem, 2.4vw, 2rem); }
.ccard > *{ position: relative; z-index: 2; }
.ccard .sash{ z-index: 1; }
.cdl{ margin-top: 2rem; display: grid; gap: 0; }
.cdl a, .cdl div{
  display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: center;
  padding: 1.25rem 0; border-top: 1px solid var(--line-d);
  text-decoration: none; color: var(--inv);
  transition: padding-left .3s var(--ease);
}
.cdl a:hover{ padding-left: .5rem; }
.cdl a:last-child, .cdl div:last-child{ border-bottom: 1px solid var(--line-d); }
.cdl-mk{ width: 38px; height: 38px; display: grid; place-items: center; background: var(--signal); border-radius: 2px; flex: none; color: #fff; }
.cdl-mk svg{ width: 17px; height: 17px; }
.cdl-k{ font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--inv-3); display: block; margin-bottom: .28rem; }
.cdl-v{ font-size: 1.06rem; font-weight: 600; letter-spacing: -.01em; word-break: break-word; }
.cdl a:hover .cdl-v{ color: var(--signal-hi); }

/* Form */
.form{ background: var(--paper); border: 1px solid var(--line-l); border-radius: 3px; padding: clamp(1.6rem, 3vw, 2.4rem); }
.form h2{ font-size: clamp(1.45rem, 2.3vw, 1.9rem); margin-bottom: .7rem; }
.form > p{ font-size: var(--fs-sm); color: var(--ink-2); margin-bottom: 1.9rem; }
.fields{ display: grid; gap: 1.15rem; }
.f2{ display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem; }
.field label{
  display: block; font-family: var(--f-mono); font-size: var(--fs-mono);
  letter-spacing: .13em; text-transform: uppercase; color: var(--ink-3); margin-bottom: .5rem;
}
.field label .req{ color: var(--signal-deep); }
.field input, .field textarea{
  width: 100%; background: var(--chalk); color: var(--ink);
  border: 1px solid var(--line-l-2); border-radius: 2px;
  padding: .82rem .95rem; font-size: var(--fs-sm); font-family: var(--f-text);
  transition: border-color .22s var(--ease), background .22s var(--ease), box-shadow .22s var(--ease);
}
.field textarea{ min-height: 148px; resize: vertical; line-height: 1.6; }
.field input::placeholder, .field textarea::placeholder{ color: var(--chalk-4); }
.field input:focus, .field textarea:focus{
  outline: none; background: var(--paper);
  border-color: var(--signal); box-shadow: 0 0 0 3px var(--signal-wash);
}
.field input:user-invalid, .field textarea:user-invalid{ border-color: var(--signal-deep); }
.err{ display: block; margin-top: .4rem; font-size: var(--fs-xs); color: var(--signal-deep); min-height: 1em; }
.form-note{ margin-top: 1.3rem; font-size: var(--fs-xs); color: var(--ink-3); line-height: 1.55; }
.form-status{
  margin-top: 1.2rem; padding: .95rem 1.1rem; border-radius: 2px; font-size: var(--fs-sm);
  background: var(--signal-wash); border: 1px solid var(--signal-line); color: var(--ink);
}
.form-status[hidden]{ display: none; }

/* --------------------------------------------------------------------------
   22 · FOOTER
   -------------------------------------------------------------------------- */
.foot{ background: var(--bitumen); color: var(--inv-2); position: relative; overflow: hidden; }
.foot .shell{ position: relative; z-index: 2; }
.foot-top{
  display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: clamp(2rem, 4vw, 3.6rem);
  padding-block: clamp(3rem, 5.5vw, 4.6rem) clamp(2.2rem, 4vw, 3.2rem);
}
.foot-brand .brand{ color: var(--inv); }
.foot-brand .brand-sub{ color: var(--inv-3); }
.foot-blurb{ margin-top: 1.4rem; font-size: var(--fs-sm); color: var(--inv-2); max-width: 42ch; line-height: 1.62; }
.foot h3{
  font-family: var(--f-mono); font-size: var(--fs-mono); font-weight: 400;
  letter-spacing: .16em; text-transform: uppercase; color: var(--signal-hi);
  margin-bottom: 1.3rem;
}
.foot-links{ display: grid; gap: .72rem; }
.foot-links a{
  font-size: var(--fs-sm); color: var(--inv-2); text-decoration: none;
  transition: color .22s var(--ease), padding-left .26s var(--ease);
  display: inline-block;
}
.foot-links a:hover{ color: var(--inv); padding-left: .35rem; }
.foot-contact{ display: grid; gap: 1rem; }
.foot-contact a{
  display: grid; grid-template-columns: auto 1fr; gap: .7rem; align-items: center;
  color: var(--inv-2); text-decoration: none; font-size: var(--fs-sm);
  transition: color .22s var(--ease);
  word-break: break-word;
}
.foot-contact a:hover{ color: var(--signal-hi); }
.foot-contact svg{ width: 15px; height: 15px; flex: none; color: var(--signal-hi); }

.foot-bot{
  border-top: 1px solid var(--line-d);
  padding-block: 1.6rem 2rem;
  display: flex; flex-wrap: wrap; gap: .9rem 1.5rem; align-items: center; justify-content: space-between;
}
.foot-bot p{ font-size: var(--fs-xs); color: var(--inv-3); margin: 0; }
.foot-bot a{ color: var(--inv-2); text-decoration: none; }
.foot-bot a:hover{ color: var(--signal-hi); text-decoration: underline; }

/* --------------------------------------------------------------------------
   23 · 404
   -------------------------------------------------------------------------- */
.nf{ min-height: 66vh; display: grid; place-items: center; text-align: center; padding-block: var(--sec); }
.nf-code{
  font-family: var(--f-mono); font-size: clamp(3.6rem, 12vw, 8rem); line-height: 1;
  color: var(--chalk-4); letter-spacing: .04em;
}
.nf h1{ margin-top: 1.2rem; }
.nf p{ margin: 1.1rem auto 0; max-width: 50ch; color: var(--ink-2); }
.nf .btn-row{ margin-top: 2rem; justify-content: center; }

/* --------------------------------------------------------------------------
   24 · SCROLL REVEAL
   -------------------------------------------------------------------------- */
/* Content is visible by default. The hidden start state is applied only
   under `.js`, a class added by an inline head script and removed again
   automatically if main.js never reports ready — so a blocked, failed or
   disabled script can never leave a section stranded at opacity 0. */
.rv{ opacity: 1; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .rv{ opacity: 0; transform: translateY(20px); }
.js .rv.is-in{ opacity: 1; transform: none; }
.rv-d1{ transition-delay: .07s; }
.rv-d2{ transition-delay: .14s; }
.rv-d3{ transition-delay: .21s; }
.rv-d4{ transition-delay: .28s; }

/* Hairline draw-in for section rules */
.draw{ transform: scaleX(1); transform-origin: left; transition: transform .8s var(--ease); }
.js .draw{ transform: scaleX(0); }
.js .draw.is-in{ transform: scaleX(1); }

@media (prefers-reduced-motion: reduce){
  .rv, .js .rv, .js .rv.is-in{ opacity: 1; transform: none; transition: none; }
  .draw, .js .draw, .js .draw.is-in{ transform: scaleX(1); transition: none; }
  *, *::before, *::after{
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------------
   25 · RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1180px){
  .nav a{ font-size: .8rem; }
  .brand-sub{ display: none; }
}

@media (max-width: 1040px){
  .nav, .masthead-cta{ display: none; }
  .burger{ display: grid; place-items: center; }
  .brand-sub{ display: block; }

  .hero-grid{ grid-template-columns: 1fr; gap: 2.4rem; }
  .hero-media{ order: -1; }
  .cta-in{ grid-template-columns: 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
  .railed{ grid-template-columns: 1fr; }
  .railed-side{ position: static; }
  .foot-top{ grid-template-columns: 1fr 1fr; }
  .foot-brand{ grid-column: 1 / -1; }

  .principle-head{ grid-column: 1 / span 12; }
  .principle-body{ grid-column: 1 / span 12; }
}

@media (max-width: 860px){
  .split{ grid-template-columns: 1fr; gap: 2rem; }
  .split--reverse .split-media{ order: 0; }
  .appcard.c-a, .appcard.c-b, .appcard.c-c,
  .appcard.c-d, .appcard.c-e, .appcard.c-f{ grid-column: 1 / -1; }
  .hero-ledger{ grid-template-columns: 1fr; gap: 1.15rem; }
  .rail{ grid-template-columns: 1fr; }
  .rail-item{ border-left: 0; border-top: 1px solid var(--line-d); }
  .rail-item:last-child{ border-right: 0; border-bottom: 1px solid var(--line-d); }
  .rail-item::before{ top: -1px; left: 0; width: 0; height: 3px; }
  .rail-item:hover::before{ height: 3px; width: 100%; }
  .rail-n{ margin-bottom: .9rem; }
}

@media (max-width: 680px){
  :root{ --fs-body: 1.02rem; }
  .spec-row{ grid-template-columns: 2.4rem 1fr; row-gap: .5rem; }
  .spec-v{ grid-column: 2; }
  .deflist > div{ grid-template-columns: 1fr; gap: .5rem; }
  .f2{ grid-template-columns: 1fr; }
  .acc-panel-in{ padding-left: .2rem; }
  .acc-btn{ font-size: .98rem; gap: .75rem; }
  .foot-top{ grid-template-columns: 1fr; }
  .foot-bot{ flex-direction: column; align-items: flex-start; }
  /* Comfortable tap targets for the footer nav on small screens */
  .foot-links{ gap: 0; }
  .foot-links a{ padding: .52rem 0; }
  .foot-contact a{ padding: .3rem 0; }
  .btn{ width: 100%; }
  .btn-row{ flex-direction: column; align-items: stretch; }
  .hero .btn-row .btn{ width: 100%; }
  .jump a{ font-size: .72rem; }
}

/* Small handsets: the brand sub-label plus the burger cannot both fit
   alongside the wordmark, and forcing them causes horizontal overflow. */
@media (max-width: 430px){
  .masthead-in{ gap: .6rem; }
  .brand{ min-width: 0; }
  .brand-name{ font-size: .92rem; }
  .brand-mark{ width: 33px; height: 33px; }
  .masthead .brand-sub{ display: none; }
}

@media (max-width: 360px){
  .brand-name{ font-size: .82rem; }
  .burger{ width: 42px; height: 42px; }
  .drawer nav a{ font-size: 1.16rem; }
}

/* --------------------------------------------------------------------------
   26 · STATEMENT BAND
   -------------------------------------------------------------------------- */
.statement{ position: relative; overflow: hidden; }
.statement .shell{ position: relative; z-index: 2; }
.statement-q{
  font-family: var(--f-display); font-weight: 700;
  font-size: clamp(1.55rem, 3.3vw, 2.75rem); line-height: 1.18; letter-spacing: -.028em;
  max-width: 24ch;
}
.statement-note{
  margin-top: 1.6rem; padding-top: 1.5rem; border-top: 1px solid var(--line-d);
  font-size: var(--fs-sm); max-width: 62ch;
}

/* --------------------------------------------------------------------------
   27 · TIMELINE (applications)
   -------------------------------------------------------------------------- */
.tline{ margin-top: 3rem; position: relative; }
.tline::before{
  content: ""; position: absolute; left: 11px; top: 8px; bottom: 8px; width: 1px;
  background: var(--line-l-2);
}
.tline-item{ position: relative; padding: 0 0 clamp(2rem, 4vw, 3rem) clamp(2.6rem, 4vw, 3.6rem); }
.tline-item:last-child{ padding-bottom: 0; }
.tline-item::before{
  content: ""; position: absolute; left: 4px; top: 8px; width: 15px; height: 15px;
  background: var(--chalk); border: 3px solid var(--signal); border-radius: 50%;
  transition: transform .35s var(--ease);
}
.tline-item:hover::before{ transform: scale(1.22); }
.tline-k{
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .13em;
  text-transform: uppercase; color: var(--signal-deep); display: block; margin-bottom: .7rem;
}
.tline-item h3{ margin-bottom: .7rem; }
.tline-item p{ color: var(--ink-2); max-width: 68ch; }
.tline-item p + p{ margin-top: .9rem; }
.tline-meta{
  margin-top: 1.1rem; display: flex; flex-wrap: wrap; gap: .5rem;
}
.tline-meta span{
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .06em;
  color: var(--ink-3); border: 1px solid var(--line-l); border-radius: 2px;
  padding: .35rem .7rem; background: var(--paper);
}

/* --------------------------------------------------------------------------
   28 · PRODUCT BLOCKS (seat belts page)
   -------------------------------------------------------------------------- */
.prod{
  display: grid; grid-template-columns: 5.5rem 1fr; gap: clamp(1rem, 2.4vw, 2.2rem);
  padding: clamp(1.8rem, 3.2vw, 2.8rem) 0; border-top: 1px solid var(--line-l);
}
.prod:last-of-type{ border-bottom: 1px solid var(--line-l); }
.prod-n{
  font-family: var(--f-mono); font-size: 2.6rem; font-weight: 300; line-height: .9;
  color: var(--chalk-4); letter-spacing: -.02em;
}
.prod h3{ font-size: clamp(1.25rem, 2vw, 1.6rem); margin-bottom: .9rem; }
.prod p{ color: var(--ink-2); max-width: 70ch; }
.prod p + p{ margin-top: .95rem; }
.prod-spec{
  margin-top: 1.4rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: .9rem 1.6rem; padding-top: 1.3rem; border-top: 1px dashed var(--line-l-2);
}
.prod-spec div{ min-width: 0; }
.prod-spec dt{
  font-family: var(--f-mono); font-size: var(--fs-mono); letter-spacing: .12em;
  text-transform: uppercase; color: var(--signal-deep); margin-bottom: .3rem;
}
.prod-spec dd{ margin: 0; font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.55; }

/* --------------------------------------------------------------------------
   29 · TABLE OF CONTENTS (guide)
   -------------------------------------------------------------------------- */
.toc{
  background: var(--chalk-2); border: 1px solid var(--line-l); border-radius: 3px;
  padding: clamp(1.3rem, 2.2vw, 1.8rem);
}
.toc h2{
  font-family: var(--f-mono); font-size: var(--fs-mono); font-weight: 400;
  letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 1.2rem;
}
.toc ol{ display: grid; gap: 0; counter-reset: toc; }
.toc li{ border-top: 1px solid var(--line-l); }
.toc li:first-child{ border-top: 0; }
.toc a{
  display: grid; grid-template-columns: 2.2rem 1fr; gap: .6rem; align-items: baseline;
  padding: .72rem 0; text-decoration: none; color: var(--ink);
  font-size: var(--fs-sm); font-weight: 550;
  transition: color .22s var(--ease), padding-left .26s var(--ease);
}
.toc a::before{
  counter-increment: toc; content: counter(toc, decimal-leading-zero);
  font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--signal-deep); font-weight: 400;
}
.toc a:hover{ color: var(--signal-deep); padding-left: .3rem; }

/* Sticky TOC layout for the guide */
.guide-layout{ display: grid; grid-template-columns: minmax(0, 290px) minmax(0, 1fr); gap: clamp(1.8rem, 4vw, 3.6rem); align-items: start; }
.guide-aside{ position: sticky; top: 100px; }

@media (max-width: 1040px){
  .guide-layout{ grid-template-columns: 1fr; }
  .guide-aside{ position: static; }
}
@media (max-width: 680px){
  .prod{ grid-template-columns: 1fr; gap: .6rem; }
  .prod-n{ font-size: 1.9rem; }
  .tline-item{ padding-left: 2.4rem; }
}

/* --------------------------------------------------------------------------
   30 · PRINT
   -------------------------------------------------------------------------- */
@media print{
  .masthead, .drawer, .burger, .cta, .jump, .sash, .weave::before, .grid-field::before{ display: none !important; }
  body{ background: #fff; color: #000; }
  .rv{ opacity: 1 !important; transform: none !important; }
  a[href^="http"]::after{ content: " (" attr(href) ")"; font-size: .8em; }
}