/* ============================================================
   nexthop.engineer — Direction B + amber accent
   Hand-rolled design tokens (no CSS framework: performance is the
   design statement). Distinct from UNSX Core (no navy/gold).
   ============================================================ */

:root {
  --amber:        #E9A23B;   /* the signal colour — used sparingly */
  --amber-deep:   #B26A12;   /* AA-safe amber for text on light bg */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, monospace;
  --maxw: 1080px;
}

html[data-theme="dark"] {
  --bg:      #0E0F13;        /* neutral charcoal — deliberately NOT navy */
  --surface: #16181E;
  --text:    #ECEAE4;        /* warm off-white */
  --muted:   #8B9099;
  --line:    rgba(255,255,255,.09);
  --accent:  var(--amber);
  --accent-soft: rgba(233,162,59,.12);
  --shadow:  0 1px 0 rgba(255,255,255,.03);
}

html[data-theme="light"] {
  --bg:      #F6F4EF;        /* warm off-white */
  --surface: #FFFFFF;
  --text:    #15171C;        /* ink */
  --muted:   #5C616B;
  --line:    rgba(0,0,0,.10);
  --accent:  var(--amber-deep);
  --accent-soft: rgba(233,162,59,.16);
  --shadow:  0 1px 2px rgba(0,0,0,.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.005em;
  transition: background .35s ease, color .35s ease;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.wrap.narrow { max-width: 680px; }
a { color: inherit; text-decoration: none; }
.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }
h2, h3 { letter-spacing: -0.02em; }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 19px; letter-spacing: -0.02em; }
.brand .word b, .foot-brand .word b { color: var(--accent); font-weight: 700; }
.brand .tld, .foot-brand .tld { font-family: var(--font-mono); font-size: 12px; color: var(--muted); font-weight: 400; margin-left: 1px; }
nav.links { display: flex; gap: 26px; margin-left: auto; }
nav.links a { font-size: 14.5px; color: var(--muted); transition: color .2s; }
nav.links a:hover { color: var(--text); }
.cta {
  font-family: var(--font-mono); font-size: 13.5px; font-weight: 500;
  border: 1px solid var(--accent); color: var(--accent);
  padding: 9px 16px; border-radius: 7px; transition: all .2s;
}
.cta:hover { background: var(--accent); color: var(--bg); }
.toggle {
  font-family: var(--font-mono); font-size: 12px; color: var(--muted);
  background: none; border: 1px solid var(--line); border-radius: 7px;
  padding: 8px 11px; cursor: pointer; transition: all .2s;
}
.toggle:hover { color: var(--text); border-color: var(--muted); }

/* ---------- shared bits ---------- */
.eyebrow {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 22px;
  display: flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--accent); display: inline-block; }
.lead { font-size: clamp(1.05rem, 1.9vw, 1.25rem); color: var(--muted); max-width: 60ch; font-weight: 400; }
.avail {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 13px; color: var(--text);
  background: var(--accent-soft); border: 1px solid var(--accent);
  padding: 8px 15px; border-radius: 999px;
}
.avail .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.muted-note { color: var(--muted); font-size: .85rem; margin-top: 14px; font-family: var(--font-mono); }

/* buttons */
.btn {
  display: inline-block; font-family: var(--font-mono); font-size: 14px; font-weight: 500;
  background: var(--accent); color: var(--bg); border: 1px solid var(--accent);
  padding: 11px 18px; border-radius: 8px; cursor: pointer; transition: all .2s;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn.ghost { background: none; color: var(--accent); }
.btn.ghost:hover { background: var(--accent-soft); transform: none; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }

/* tags */
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-family: var(--font-mono); font-size: 12px; color: var(--muted); border: 1px solid var(--line); padding: 4px 10px; border-radius: 6px; }

/* ---------- home hero ---------- */
.hero { position: relative; padding: 88px 0 64px; }
.hero .wrap { position: relative; z-index: 1; }
.bg-route { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; opacity: .5; }
.bg-route svg { position: absolute; right: -8%; top: 8%; width: 70%; height: auto; }
.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 700; line-height: 1.02;
  letter-spacing: -0.03em; margin-bottom: 26px;
}
.hero h1 .hl { color: var(--accent); }
.hero .avail { margin-top: 34px; }

/* ---------- home audience fork ---------- */
.fork { padding: 26px 0 96px; }
.fork-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 18px; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 28px 28px 24px; box-shadow: var(--shadow);
  transition: border-color .25s, transform .25s; position: relative; overflow: hidden;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card .k { font-family: var(--font-mono); font-size: 12px; color: var(--accent); letter-spacing: .08em; }
.card h3 { font-size: 1.45rem; font-weight: 600; margin: 10px 0 8px; }
.card p { color: var(--muted); font-size: 0.98rem; margin-bottom: 18px; }
.card .go { font-family: var(--font-mono); font-size: 13.5px; color: var(--text); display: inline-flex; align-items: center; gap: 7px; }
.card .go .arr { color: var(--accent); transition: transform .2s; }
.card:hover .go .arr { transform: translateX(5px); }
.footnote { margin-top: 30px; font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); }
.footnote a { color: var(--accent); border-bottom: 1px solid transparent; }
.footnote a:hover { border-color: var(--accent); }

/* ---------- inner pages ---------- */
.page { padding: 72px 0 88px; }
.page-head { margin-bottom: 48px; }
.page-title { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; line-height: 1.05; letter-spacing: -0.03em; margin-bottom: 20px; }
.section-h { font-size: 1.5rem; font-weight: 600; margin: 56px 0 22px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.prose p { margin-bottom: 18px; max-width: 62ch; }
.prose .avail { margin-top: 6px; }

/* about */
.about-grid { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.about-side { position: sticky; top: 92px; }
.portrait {
  aspect-ratio: 1 / 1; border: 1px dashed var(--line); border-radius: 14px;
  background: var(--surface); display: grid; place-items: center; margin-bottom: 22px;
}
.portrait span { font-family: var(--font-mono); font-size: 12px; color: var(--muted); text-align: center; letter-spacing: .1em; text-transform: uppercase; }
.facts { font-size: .92rem; }
.facts dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-top: 16px; }
.facts dd { margin-top: 3px; }
.facts a { color: var(--accent); }

.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.skill-group { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.skill-group h3 { font-size: 1.05rem; color: var(--accent); margin-bottom: 14px; }
.skill-group ul { list-style: none; }
.skill-group li { padding: 5px 0; color: var(--muted); font-size: .95rem; border-bottom: 1px solid var(--line); }
.skill-group li:last-child { border-bottom: 0; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.ticks { list-style: none; }
.ticks li { padding: 9px 0 9px 26px; position: relative; color: var(--muted); border-bottom: 1px solid var(--line); }
.ticks li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }

/* work / case studies */
.cases { display: flex; flex-direction: column; gap: 20px; }
.case { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 30px; transition: border-color .25s; }
.case:hover { border-color: var(--accent); }
.case-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.case-head h2 { font-size: 1.4rem; }
.case-sector { font-size: 12px; color: var(--muted); }
.case-body { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 22px; }
.case-k { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 8px; }
.case-k.accent { color: var(--accent); }
.case-body p { font-size: .95rem; color: var(--text); }
.cta-band { margin-top: 40px; padding: 30px; border: 1px solid var(--accent); border-radius: 14px; background: var(--accent-soft); display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band p { max-width: 60ch; }

/* apps */
.app-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.app-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 22px; display: flex; flex-direction: column; transition: border-color .25s, transform .25s; }
.app-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.app-thumb { aspect-ratio: 16 / 9; border-radius: 10px; background: linear-gradient(135deg, var(--bg), var(--surface)); border: 1px solid var(--line); display: grid; place-items: center; margin-bottom: 18px; }
.app-thumb span { font-family: var(--font-mono); font-size: 12px; color: var(--muted); letter-spacing: .1em; text-transform: uppercase; }
.app-card h2 { font-size: 1.25rem; margin-bottom: 6px; }
.app-outcome { color: var(--muted); font-size: .95rem; margin-bottom: 14px; }
.app-ai { font-size: 11.5px; color: var(--muted); margin: 14px 0; line-height: 1.5; }
.app-links { display: flex; gap: 18px; margin-top: auto; font-family: var(--font-mono); font-size: 13px; }
.app-links a { color: var(--accent); }
.app-links a.disabled { color: var(--muted); opacity: .5; pointer-events: none; }

/* writing / empty states */
.empty-state { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 48px 36px; text-align: center; }
.empty-state .mono { color: var(--muted); margin-bottom: 14px; }
.empty-state p { color: var(--muted); max-width: 48ch; margin: 0 auto 22px; }

/* contact form */
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.field .opt { text-transform: none; letter-spacing: 0; }
.field input, .field select, .field textarea {
  background: var(--surface); border: 1px solid var(--line); border-radius: 9px;
  padding: 12px 14px; color: var(--text); font-family: inherit; font-size: 1rem;
  width: 100%; transition: border-color .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field textarea { resize: vertical; }
.field .err { color: #E5484D; font-size: .85rem; font-family: var(--font-mono); }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); margin-top: 40px; }
.footer-grid { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; padding: 48px 28px 32px; }
.foot-brand { font-weight: 700; font-size: 18px; }
.foot-brand p { font-weight: 400; font-size: .9rem; color: var(--muted); margin-top: 10px; max-width: 34ch; font-family: var(--font-display); letter-spacing: -0.005em; }
.foot-links, .foot-social { display: flex; flex-direction: column; gap: 10px; font-size: .92rem; }
.foot-links a, .foot-social a { color: var(--muted); transition: color .2s; }
.foot-links a:hover, .foot-social a:hover { color: var(--accent); }
.ribbon { text-align: center; font-family: var(--font-mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); padding: 18px 14px; border-top: 1px solid var(--line); }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-side { position: static; max-width: 320px; }
  .case-body { grid-template-columns: 1fr; gap: 16px; }
  .two-col { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
  nav.links { display: none; }
  .nav .cta { display: none; }
  .nav .toggle { margin-left: auto; }
  .hamburger { display: inline-flex; }
  .hero { padding-top: 56px; }
  .cta-band { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* ---------- skip link, hamburger, mobile menu, focus ---------- */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--bg); padding: 10px 16px;
  font-family: var(--font-mono); font-size: 13px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.hamburger {
  display: none; margin-left: 6px; background: none; border: 1px solid var(--line);
  color: var(--text); border-radius: 7px; width: 38px; height: 38px;
  font-size: 16px; cursor: pointer; align-items: center; justify-content: center;
}
.mobile-menu {
  display: none; flex-direction: column;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 96%, transparent);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 14px 28px; color: var(--text); font-size: 1rem;
  border-top: 1px solid var(--line);
}
.mobile-menu a:hover { color: var(--accent); background: var(--accent-soft); }
@media (min-width: 721px) { .mobile-menu, .hamburger { display: none !important; } }

/* ---------- home: hero CTA, capabilities, subtle paths ---------- */
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 36px; }

.capabilities { padding: 16px 0 8px; }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cap { border-top: 1px solid var(--line); padding-top: 18px; }
.cap h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.cap h3::before { content: "→ "; color: var(--accent); }
.cap p { color: var(--muted); font-size: .96rem; }

.paths { padding: 40px 0 96px; }
.path-links { display: flex; gap: 14px 48px; flex-wrap: wrap; }
.path-links a { font-family: var(--font-mono); font-size: 14px; color: var(--muted); display: inline-flex; align-items: center; gap: 8px; transition: color .2s; }
.path-links a:hover { color: var(--text); }
.path-links a .arr { color: var(--accent); transition: transform .2s; }
.path-links a:hover .arr { transform: translateX(4px); }

@media (max-width: 720px) { .cap-grid { grid-template-columns: 1fr; } }

/* ---------- home: featured work band ---------- */
.featured { padding: 48px 0 8px; }
.feat-case { display: block; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 30px; transition: border-color .25s, transform .25s; }
.feat-case:hover { border-color: var(--accent); transform: translateY(-3px); }
.feat-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.feat-head h3 { font-size: 1.35rem; }
.feat-sector { font-size: 12px; color: var(--muted); }
.feat-result { font-size: 1.08rem; color: var(--text); margin-bottom: 16px; max-width: 64ch; }
.feat-go { font-family: var(--font-mono); font-size: 13.5px; color: var(--accent); display: inline-flex; align-items: center; gap: 7px; margin-top: 8px; }
.feat-go .arr { transition: transform .2s; }
.feat-case:hover .feat-go .arr { transform: translateX(5px); }

/* ---------- flash messages ---------- */
.flashes { margin-top: 20px; }
.flash { padding: 11px 16px; border-radius: 9px; font-size: .92rem; margin-bottom: 10px; border: 1px solid var(--line); }
.flash.ok { border-color: var(--accent); background: var(--accent-soft); }
.flash.error { border-color: #E5484D; color: #E5484D; }

/* ---------- writing list ---------- */
.post-list { list-style: none; }
.post-list li { border-top: 1px solid var(--line); }
.post-list li:last-child { border-bottom: 1px solid var(--line); }
.post-list a { display: block; padding: 22px 0; transition: padding-left .2s; }
.post-list a:hover { padding-left: 8px; }
.post-list .post-date { font-size: 12px; color: var(--accent); letter-spacing: .08em; }
.post-list h2 { font-size: 1.3rem; font-weight: 600; margin: 6px 0; }
.post-list p { color: var(--muted); font-size: .96rem; }

/* ---------- article ---------- */
.article { padding-top: 8px; }
.back-link { color: var(--muted); font-size: 13px; }
.back-link:hover { color: var(--accent); }
.post-meta { color: var(--accent); font-size: 13px; letter-spacing: .08em; margin-bottom: 32px; }
.article-body { font-size: 1.06rem; line-height: 1.7; }
.article-body h2 { font-size: 1.5rem; margin: 36px 0 14px; }
.article-body h3 { font-size: 1.2rem; margin: 28px 0 12px; }
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol { margin: 0 0 18px 22px; }
.article-body li { margin-bottom: 6px; }
.article-body a { color: var(--accent); border-bottom: 1px solid transparent; }
.article-body a:hover { border-color: var(--accent); }
.article-body code { font-family: var(--font-mono); font-size: .9em; background: var(--surface); padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); }
.article-body pre { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px; overflow-x: auto; margin-bottom: 18px; }
.article-body pre code { background: none; border: 0; padding: 0; }
.article-body blockquote { border-left: 2px solid var(--accent); padding-left: 18px; color: var(--muted); margin: 0 0 18px; }
.article-body table { border-collapse: collapse; width: 100%; margin-bottom: 18px; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }

/* ---------- admin ---------- */
.admin-bar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 28px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.admin-table th { text-align: left; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--line); }
.admin-table td { padding: 14px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.admin-table a { color: var(--text); }
.admin-table a:hover { color: var(--accent); }
.status { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; padding: 3px 9px; border-radius: 6px; border: 1px solid var(--line); color: var(--muted); }
.status.published { color: var(--accent); border-color: var(--accent); }
.row-actions { display: flex; gap: 14px; align-items: center; }
.row-actions form { display: inline; }
.link-danger { background: none; border: 0; cursor: pointer; color: #E5484D; font-size: inherit; padding: 0; }
.admin-form textarea.mono { line-height: 1.5; }
.vault-new { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.vault-new input { background: var(--surface); border: 1px solid var(--line); border-radius: 9px; padding: 11px 14px; color: var(--text); font-family: inherit; }
.vault-new input[type=text] { flex: 1; min-width: 240px; }

/* ---------- vault (public) ---------- */
.vault-form { max-width: 380px; }
.vault-items { display: flex; flex-direction: column; gap: 16px; }
.vault-item { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.vault-item-head { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; }
.vault-item-head h2 { font-size: 1.2rem; }
.vault-kind { font-size: 11px; color: var(--accent); letter-spacing: .06em; }
.vault-item p { color: var(--muted); font-size: .96rem; margin-bottom: 14px; }
.vault-dl { font-size: 13px; color: var(--accent); }
.vault-dl.disabled { color: var(--muted); opacity: .5; pointer-events: none; }

/* ---------- admin: contact inbox ---------- */
.msg-list { display: flex; flex-direction: column; gap: 14px; }
.msg { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; }
.msg.handled { opacity: .55; }
.msg-head { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; }
.msg-head a { color: var(--accent); }
.msg-head .tag { margin-left: 6px; }
.msg-date { font-size: 12px; color: var(--muted); }
.msg-body { color: var(--text); font-size: .96rem; white-space: pre-wrap; margin-bottom: 14px; }
.link-plain { background: none; border: 0; cursor: pointer; color: var(--muted); font-size: inherit; padding: 0; }
.link-plain:hover { color: var(--accent); }