/* ============================================================
   BackRoadIntel — Remote Asset & Corridor Intelligence
   Shared design system
   Design language: warm paper, spruce + blaze, corridor rail.
   Type: Archivo (display) + IBM Plex Mono (capture stamps only).
   ============================================================ */

:root{
  /* palette */
  --paper:#F1F2EE;
  --paper-deep:#E9EAE3;
  --panel:#FAFAF7;
  --ink:#1F261F;
  --ink-soft:#4A5248;
  --ink-faint:#7C8377;
  --line:#D8D7CE;
  --line-soft:#E4E4DB;
  --spruce:#2F4A33;
  --spruce-deep:#233A27;
  --blaze:#E8590C;
  --blaze-deep:#C64A08;
  --blaze-tint:#FBEADF;
  --field:#161B16;      /* dark capture panel */
  --field-2:#1E241E;
  --field-ink:#E8EAE4;
  --field-line:#2C332C;

  /* type */
  --sans:'Archivo',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',Menlo,monospace;

  /* spacing scale */
  --gap:20px;
  --maxw:1120px;
  --radius:12px;
  --radius-lg:16px;

  /* elevation */
  --shadow-sm:0 1px 2px rgba(31,38,31,.05);
  --shadow:0 4px 20px -6px rgba(31,38,31,.14);
  --shadow-lg:0 18px 50px -18px rgba(31,38,31,.30);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.55;
  font-variation-settings:'wdth' 100;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;color:inherit;background:none;border:none}
:focus-visible{outline:3px solid var(--blaze);outline-offset:2px;border-radius:3px}

/* ---------- utilities ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.mono{font-family:var(--mono)}
.eyebrow{font-weight:600;color:var(--spruce);letter-spacing:.02em;font-size:.9rem}
.muted{color:var(--ink-soft)}
.center{text-align:center}
.nowrap{white-space:nowrap}

h1,h2,h3,h4{letter-spacing:-.02em;line-height:1.12;font-weight:700}
h1{font-size:clamp(2rem,4.6vw,3.35rem);font-weight:800;font-variation-settings:'wdth' 96}
h2{font-size:clamp(1.55rem,3vw,2.15rem);max-width:24ch}
h3{font-size:1.15rem}
h4{font-size:1.25rem;letter-spacing:-.01em}
.lede{color:var(--ink-soft);max-width:58ch;margin-top:12px;font-size:1.05rem}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--blaze);color:#fff;
  border-radius:9px;padding:12px 20px;
  font-weight:600;font-size:.96rem;
  box-shadow:var(--shadow-sm);
  transition:background .15s,transform .15s,box-shadow .15s;
}
.btn:hover{background:var(--blaze-deep);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink);box-shadow:none}
.btn.ghost:hover{background:var(--ink);color:var(--paper)}
.btn.spruce{background:var(--spruce)}
.btn.spruce:hover{background:var(--spruce-deep)}
.btn.sm{padding:9px 15px;font-size:.9rem;border-radius:8px}
.btn .arrow{transition:transform .15s}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- header ---------- */
.top{
  position:sticky;top:0;z-index:60;
  background:color-mix(in srgb,var(--paper) 90%,transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.top-in{
  max-width:var(--maxw);margin:0 auto;padding:13px 20px;
  display:flex;align-items:center;gap:24px;
}
.wordmark{font-weight:800;font-size:1.06rem;letter-spacing:-.015em;display:flex;align-items:center;gap:10px}
.wordmark .brand-logo{height:34px;width:auto;display:block}
.wordmark .dot{width:9px;height:9px;border-radius:50%;background:var(--blaze);align-self:center}
.wordmark small{font-weight:400;font-size:.76rem;color:var(--ink-soft)}
.foot-brand .wordmark .brand-logo{height:32px}
.top nav{margin-left:auto;display:flex;gap:22px;align-items:center}
.top nav a.navlink{font-size:.92rem;color:var(--ink-soft);transition:color .12s}
.top nav a.navlink:hover,.top nav a.navlink[aria-current="page"]{color:var(--ink)}
.nav-toggle{display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);border-radius:9px;align-items:center;justify-content:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:'';display:block;width:18px;height:2px;background:var(--ink);position:relative;transition:.2s}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
@media(max-width:840px){
  .nav-toggle{display:flex}
  .top nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);border-bottom:1px solid var(--line);
    padding:8px 20px 18px;margin-left:0;
    display:none;
  }
  .top nav.open{display:flex}
  .top nav a.navlink{padding:12px 0;border-bottom:1px solid var(--line-soft);font-size:1rem}
  .top nav .btn{margin-top:12px;justify-content:center}
}

/* ---------- corridor rail ---------- */
.rail-wrap{position:relative;max-width:var(--maxw);margin:0 auto;padding:0 20px}
@media(min-width:960px){
  .rail-wrap{padding-left:96px;padding-right:96px}
  .rail-wrap::before{
    content:'';position:absolute;left:48px;top:0;bottom:0;width:2px;
    background:repeating-linear-gradient(to bottom,var(--blaze) 0 14px,transparent 14px 24px);
    opacity:.5;
  }
}
.km{position:relative;padding-top:84px}
.km-tag{display:inline-flex;align-items:center;gap:11px;font-size:.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--spruce);margin-bottom:18px}
.km-tag i{width:12px;height:12px;border-radius:50%;background:var(--blaze);border:3px solid var(--paper);box-shadow:0 0 0 2px var(--blaze);flex:none}
@media(min-width:960px){.km-tag i{position:absolute;left:-54px;margin-top:2px}}

/* ---------- full-bleed section bands (visual rhythm) ---------- */
.km.band,.block.band{padding-bottom:76px}
.km.band::before,.block.band::before{
  content:'';position:absolute;z-index:-1;top:0;bottom:0;
  left:50%;margin-left:-50vw;width:100vw;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.band-white::before{background:var(--panel)}
.band-deep::before{background:var(--paper-deep)}
.band-tint::before{background:linear-gradient(180deg,var(--blaze-tint),var(--panel))}
/* dark feature band */
.km.band-dark,.block.band-dark{padding-bottom:76px;color:var(--field-ink)}
.km.band-dark::before,.block.band-dark::before{
  content:'';position:absolute;z-index:-1;top:0;bottom:0;left:50%;margin-left:-50vw;width:100vw;
  background:radial-gradient(120% 120% at 20% 0%,var(--spruce) 0%,var(--field) 70%);
}
.band-dark h2,.band-dark h3{color:#fff}
.band-dark .lede,.band-dark .prob,.band-dark p{color:#CBD6C6}
.band-dark .prob{border-top-color:rgba(255,255,255,.35)}
.band-dark .prob b{color:#fff}
.band-dark .km-tag{color:#AEBAA8}
.band-dark .km-tag i{border-color:var(--field)}

/* ---------- hero ---------- */
.hero{display:grid;gap:40px;padding-top:60px}
@media(min-width:960px){.hero{grid-template-columns:1.12fr .88fr;align-items:center}}
.hero h1{max-width:18ch;margin-top:14px}
.hero .lede{font-size:1.1rem;max-width:48ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero-note{font-size:.85rem;color:var(--ink-soft);margin-top:16px}
.hero-media{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;box-shadow:var(--shadow);
}
.hero-media svg,.hero-media img{display:block;width:100%;height:auto;border-radius:8px}
.hero-media img.framed{aspect-ratio:16/9;object-fit:cover}
.hero-media img.framed.tall{aspect-ratio:4/3}
.hero-media figcaption{font-size:.8rem;color:var(--ink-soft);padding:10px 4px 2px}
.route-line{stroke:var(--blaze);stroke-width:3;fill:none;stroke-linecap:round;
  stroke-dasharray:640;stroke-dashoffset:640;animation:draw 1.6s .3s ease forwards}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- app-window frame (real product screenshots) ---------- */
.app-frame{
  border-radius:12px;overflow:hidden;border:1px solid var(--line);
  background:#0F130F;box-shadow:var(--shadow-lg);
}
.app-frame .app-bar{
  display:flex;align-items:center;gap:7px;padding:10px 12px;
  background:#1B211B;border-bottom:1px solid #2C332C;
}
.app-frame .app-bar i{width:10px;height:10px;border-radius:50%;background:#3A423A;flex:none}
.app-frame .app-bar i:nth-child(1){background:#E8590C}
.app-frame .app-bar .app-title{margin-left:8px;font-size:.76rem;color:#9AA394;font-family:var(--mono)}
.app-frame img{display:block;width:100%;height:auto}
.app-cap{font-size:.82rem;color:var(--ink-soft);padding:12px 4px 0}

/* ---------- placeholder media ---------- */
.ph{
  position:relative;border-radius:8px;overflow:hidden;
  background:
    linear-gradient(135deg,var(--paper-deep),var(--panel)),
    repeating-linear-gradient(45deg,transparent 0 11px,rgba(47,74,51,.04) 11px 22px);
  border:1px dashed var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-faint);font-size:.82rem;text-align:center;padding:18px;
  min-height:180px;
}
.ph[data-ratio="16x9"]{aspect-ratio:16/9}
.ph[data-ratio="4x3"]{aspect-ratio:4/3}
.ph[data-ratio="1x1"]{aspect-ratio:1/1}
.ph .ph-label{max-width:30ch;line-height:1.4}
.ph .ph-label b{display:block;color:var(--ink-soft);font-size:.86rem;margin-bottom:3px}
.ph.dark{background:var(--field);border-color:var(--field-line);color:#9AA394}

/* ---------- problem row ---------- */
.probs{display:grid;gap:20px;margin-top:28px}
@media(min-width:820px){.probs{grid-template-columns:repeat(3,1fr)}}
.prob{border-top:2px solid var(--ink);padding-top:14px;font-size:1.02rem;max-width:36ch}
.prob b{display:block;margin-bottom:6px}

/* ---------- sectors / groups ---------- */
.group{margin-top:38px}
.group>h3{font-size:1.05rem;font-weight:700;padding-bottom:10px;border-bottom:2px solid var(--ink)}
.group>.group-sub{font-size:.9rem;color:var(--ink-soft);margin:8px 0 6px;max-width:72ch}
details.sector{border-bottom:1px solid var(--line);border-radius:10px;transition:background .18s,box-shadow .18s,border-color .18s}
details.sector[open]{background:#fff;box-shadow:0 8px 26px -14px rgba(31,38,31,.30);border-bottom-color:transparent}
details.sector summary{
  list-style:none;display:flex;align-items:center;gap:14px;
  padding:17px 22px;font-weight:600;font-size:1.05rem;cursor:pointer;
  border-radius:10px;transition:background .16s,color .12s;
}
details.sector summary:hover{background:#fff}
details.sector[open] summary:hover{background:transparent}
details.sector summary::-webkit-details-marker{display:none}
details.sector summary .mark{flex:none;width:11px;height:11px;border:2px solid var(--blaze);border-radius:50%;transition:background .15s}
details.sector summary:hover .mark,details.sector[open] summary .mark{background:var(--blaze)}
details.sector summary .hint{margin-left:auto;font-size:.82rem;font-weight:400;color:var(--ink-soft)}
/* expand / collapse chevron */
details.sector summary::after{
  content:'';flex:none;width:9px;height:9px;margin-left:16px;
  border-right:2.5px solid var(--ink-soft);border-bottom:2.5px solid var(--ink-soft);
  transform:rotate(45deg);transform-origin:60% 60%;transition:transform .24s,border-color .12s;
}
details.sector[open] summary::after{transform:rotate(-135deg)}
details.sector summary:hover::after{border-color:var(--blaze-deep)}
details.sector .sector-body{will-change:height}
.sector-body{padding:14px 24px 34px;display:grid;gap:22px}
@media(min-width:900px){.sector-body{grid-template-columns:290px 1fr;gap:36px}}
.sector-side h4{max-width:16ch}
.sector-side p{color:var(--ink-soft);font-size:.95rem;margin-top:10px;max-width:34ch}
.sector-side .btn{margin-top:16px}

/* value-prop cards */
.vprops{display:grid;gap:14px}
@media(min-width:640px){.vprops{grid-template-columns:1fr 1fr}}
.vp{background:#fff;border:1px solid var(--line);border-radius:10px;padding:17px;box-shadow:var(--shadow-sm);transition:border-color .15s,box-shadow .15s,transform .15s}
.vp:hover{border-color:#C1C0B4;box-shadow:var(--shadow);transform:translateY(-2px)}
.vp b{display:block;margin-bottom:6px;font-size:.98rem}
.vp p{font-size:.9rem;color:var(--ink-soft)}
.sector-note{grid-column:1/-1;border-left:3px solid var(--blaze);padding:4px 0 4px 14px;font-size:.9rem;color:var(--ink-soft);max-width:72ch}
.chips{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.chips .chips-label{font-size:.85rem;font-weight:600}
.chip{font-size:.82rem;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:5px 12px;color:var(--ink-soft)}

/* ---------- record viewer (dark) ---------- */
.viewer{background:var(--field);color:var(--field-ink);border-radius:var(--radius-lg);padding:22px;margin-top:26px;box-shadow:var(--shadow-lg)}
.viewer-head{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;justify-content:space-between}
.viewer-head strong{font-size:1.05rem}
.viewer-head span{font-size:.82rem;opacity:.7}
.frame{position:relative;margin-top:16px;border-radius:8px;overflow:hidden;border:1px solid var(--field-line);background:#0F130F}
.frame svg,.frame img{display:block;width:100%;height:auto}
.stamp{
  position:absolute;left:12px;bottom:10px;
  font-family:var(--mono);font-size:.74rem;line-height:1.5;
  color:#F4F6EF;text-shadow:0 1px 2px rgba(0,0,0,.8);
}
.stamp .rec{color:#FF6B2B;font-weight:500}
.passes{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.pass-btn{background:transparent;color:var(--field-ink);border:1px solid #3A423A;border-radius:8px;padding:9px 14px;font-size:.88rem;transition:.12s}
.pass-btn:hover{border-color:#556055}
.pass-btn[aria-pressed="true"]{background:var(--blaze);border-color:var(--blaze);color:#fff;font-weight:600}
.flags{margin-top:16px;font-size:.9rem;display:grid;gap:6px}
.flags li{list-style:none;display:flex;gap:10px;align-items:baseline}
.flags li::before{content:'▸';color:var(--blaze)}
.viewer-foot{margin-top:16px;font-size:.78rem;opacity:.55}

/* ---------- steps ---------- */
.steps{display:grid;gap:22px;margin-top:26px;counter-reset:step}
@media(min-width:820px){.steps{grid-template-columns:repeat(3,1fr)}}
.step{counter-increment:step;border-top:2px solid var(--ink);padding-top:14px}
.step::before{content:counter(step);display:inline-flex;width:30px;height:30px;border-radius:50%;
  background:var(--ink);color:var(--paper);align-items:center;justify-content:center;
  font-weight:700;font-size:.92rem;margin-bottom:10px}
.step b{display:block;margin-bottom:4px}
.step p{font-size:.92rem;color:var(--ink-soft)}

/* ---------- buy paths ---------- */
.paths{display:grid;gap:20px;margin-top:26px}
@media(min-width:820px){.paths{grid-template-columns:1fr 1fr}}
.path{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative;box-shadow:var(--shadow-sm);transition:border-color .15s,box-shadow .15s}
.path:hover{border-color:#C1C0B4;box-shadow:var(--shadow)}
.path h3{font-size:1.18rem;margin-bottom:8px}
.path .path-lede{font-size:.94rem;color:var(--ink-soft);margin-bottom:14px}
.path ul{list-style:none;display:grid;gap:8px;margin:12px 0}
.path ul li{font-size:.9rem;color:var(--ink-soft);display:flex;gap:9px;align-items:baseline}
.path ul li::before{content:'✓';color:var(--spruce);font-weight:700}
.path .price{font-size:1.4rem;font-weight:800;margin:14px 0 2px}
.path .price small{font-size:.85rem;font-weight:400;color:var(--ink-soft)}
.self-select{margin-top:18px;border-left:3px solid var(--blaze);padding-left:14px;color:var(--ink-soft);max-width:68ch}

/* ---------- don't claim ---------- */
.noclaim{margin-top:26px;display:grid;gap:14px}
@media(min-width:820px){.noclaim{grid-template-columns:1fr 1fr}}
.nc{border:1px dashed var(--line);border-radius:10px;padding:16px;font-size:.92rem;color:var(--ink-soft)}
.nc b{color:var(--ink);display:block;margin-bottom:4px}

/* ---------- callout / secondary offerings ---------- */
.callout{
  margin-top:26px;background:var(--spruce);color:var(--field-ink);
  border-radius:var(--radius-lg);padding:30px;display:grid;gap:14px;
}
.callout h3{color:#fff;max-width:26ch}
.callout p{color:#CBD6C6;max-width:60ch}
.callout .btn.ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.callout .btn.ghost:hover{background:#fff;color:var(--spruce)}

/* ---------- close ---------- */
.close{padding:88px 0 40px}
.close h2{max-width:28ch}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);margin-top:80px;background:var(--panel)}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:40px 20px 30px;display:grid;gap:26px}
@media(min-width:760px){.foot-in{grid-template-columns:1.4fr 1fr 1fr}}
.foot-brand .wordmark{margin-bottom:10px}
.foot-brand p{font-size:.88rem;color:var(--ink-soft);max-width:36ch}
.foot-col h5{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-faint);margin-bottom:12px}
.foot-col a{display:block;font-size:.9rem;color:var(--ink-soft);padding:4px 0;transition:color .12s}
.foot-col a:hover{color:var(--ink)}
.foot-legal{max-width:var(--maxw);margin:0 auto;padding:18px 20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:.82rem;color:var(--ink-faint)}

/* ---------- prototype ribbon ---------- */
.proto{position:fixed;right:14px;bottom:14px;background:var(--ink);color:var(--paper);font-size:.72rem;border-radius:999px;padding:6px 12px;opacity:.85;z-index:70}

/* ---------- inner-page hero (sector pages) ---------- */
.page-hero{padding-top:56px;display:grid;gap:30px}
@media(min-width:900px){.page-hero{grid-template-columns:1.05fr .95fr;align-items:center}}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:.85rem;color:var(--ink-soft);margin-bottom:16px}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb span{color:var(--line)}
.sector-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.sector-tabs a{font-size:.85rem;border:1px solid var(--line);border-radius:999px;padding:6px 13px;color:var(--ink-soft);transition:.12s}
.sector-tabs a:hover{border-color:var(--ink);color:var(--ink)}
.sector-tabs a[aria-current="page"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* section blocks on inner pages */
.block{position:relative;padding-top:64px}
.block>h2{margin-bottom:4px}

/* use-case gallery (a few component images per sector) */
.usecases{display:grid;gap:18px;margin-top:24px}
@media(min-width:720px){.usecases{grid-template-columns:repeat(3,1fr)}}
.uc{margin:0}
.uc img,.uc .ph{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px;border:1px solid var(--line);display:block;background:#fff}
.uc img{box-shadow:var(--shadow-sm)}
.uc figcaption{font-size:.9rem;color:var(--ink);margin-top:9px;font-weight:600}
.uc figcaption small{display:block;font-weight:400;color:var(--ink-soft);font-size:.84rem;margin-top:1px}

/* stats band */
.stats{display:grid;gap:18px;margin-top:24px}
@media(min-width:640px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{border-top:2px solid var(--blaze);padding-top:12px}
.stat .num{font-size:1.9rem;font-weight:800;letter-spacing:-.02em}
.stat .lbl{font-size:.86rem;color:var(--ink-soft);margin-top:2px}

/* deferred / coming-soon banner */
.deferred{margin-top:24px;border:1px solid var(--line);background:var(--blaze-tint);border-radius:var(--radius);padding:18px 20px;font-size:.94rem;color:var(--ink-soft);display:flex;gap:12px;align-items:flex-start}
.deferred b{color:var(--ink)}
.deferred .tag{flex:none;font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;background:var(--blaze);color:#fff;border-radius:6px;padding:4px 8px}

/* ---------- form ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);max-width:640px}
.form-row{display:grid;gap:16px;margin-bottom:16px}
@media(min-width:560px){.form-row.two{grid-template-columns:1fr 1fr}}
.field label{display:block;font-size:.86rem;font-weight:600;margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;font:inherit;font-size:.95rem;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:9px;padding:11px 13px;transition:border-color .12s,box-shadow .12s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blaze);box-shadow:0 0 0 3px var(--blaze-tint)}
.field textarea{min-height:110px;resize:vertical}
.form-note{font-size:.82rem;color:var(--ink-faint);margin-top:6px}
.form-status{margin-top:14px;font-size:.9rem;padding:12px 14px;border-radius:9px;display:none}
.form-status.ok{display:block;background:#E7F0E6;color:var(--spruce-deep);border:1px solid #C4D8C1}
.form-status.err{display:block;background:#FBE4DA;color:var(--blaze-deep);border:1px solid #F0C3AE}