/* =========================================================
   KRN PROJECTS — shared stylesheet
   ========================================================= */

:root {
  /* Color tokens — deep charcoal-navy / warm paper / bronze-gold accent */
  --navy: #14212D;
  --navy-soft: #1C2E3D;
  --ink: #1A1E22;
  --paper: #FAF7F1;
  --paper-alt: #F1EAD9;
  --steel: #5B6570;
  --line: #D9D1BE;
  --line-on-dark: rgba(255, 255, 255, 0.16);
  --bronze: #A87C33;
  --bronze-light: #D3AE73;
  --white: #FFFFFF;

  /* Type */
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --content-max: 1180px;
  --side-margin: clamp(20px, 5vw, 64px);
  --rule: 1px solid var(--line);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--navy);
}

h1 { font-size: clamp(2.3rem, 4.4vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); }
h3 { font-size: 1.22rem; }
h4 { font-size: 1.02rem; }

p { margin: 0 0 1em; max-width: 62ch; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; }
::selection { background: var(--bronze-light); color: var(--navy); }
:focus-visible { outline: 2px solid var(--bronze); outline-offset: 2px; }

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: var(--side-margin);
  padding-right: var(--side-margin);
}

.section { padding: clamp(52px, 8.5vw, 100px) 0; }
.section--alt { background: var(--paper-alt); border-top: var(--rule); border-bottom: var(--rule); }
.section--dark { background: var(--navy); color: var(--white); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--white); }
.section--dark p { color: rgba(255,255,255,0.78); }

.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head .kicker {
  display: block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--bronze);
  margin-bottom: 10px;
}
.section-head-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.section-head-row .section-head { margin-bottom: 0; }

.rule { border: none; border-top: var(--rule); margin: 36px 0; }

.text-link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--bronze);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid transparent;
}
.text-link:hover { border-bottom-color: var(--bronze); }

/* ---------- Corner-tick frame (engineering-drawing registration marks) ---------- */
.tick-frame { position: relative; padding: clamp(26px, 4vw, 46px); border: 1px solid var(--line); }
.tick-frame::before, .tick-frame::after { content: ""; position: absolute; width: 16px; height: 16px; pointer-events: none; }
.tick-frame::before { top: -1px; left: -1px; border-top: 2px solid var(--bronze); border-left: 2px solid var(--bronze); }
.tick-frame::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--bronze); border-right: 2px solid var(--bronze); }

/* =========================================================
   Header / Navigation
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--paper);
  border-bottom: var(--rule);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 84px; gap: 20px; }

.brand { display: flex; align-items: center; gap: 13px; }
.brand-logo { display: block; height: 46px; width: auto; }
@media (max-width: 400px) { .brand-logo { height: 38px; } }

.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a { font-size: 0.93rem; font-weight: 500; color: var(--ink); padding: 6px 0; border-bottom: 2px solid transparent; }
.main-nav a:hover, .main-nav a[aria-current="page"] { border-bottom-color: var(--bronze); }

.header-right { display: flex; align-items: center; gap: 22px; }
.header-cta {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.84rem;
  letter-spacing: 0.02em;
  background: var(--navy);
  color: var(--white);
  padding: 11px 20px;
  border: 1px solid var(--navy);
  white-space: nowrap;
}
.header-cta:hover { background: var(--navy-soft); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  width: 42px; height: 42px; align-items: center; justify-content: center; cursor: pointer;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--navy); position: relative; }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--navy); }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

@media (max-width: 900px) {
  .main-nav {
    position: fixed; top: 84px; left: 0; right: 0; bottom: 0;
    background: var(--paper);
    flex-direction: column; align-items: flex-start; gap: 0;
    padding: 8px var(--side-margin) 24px;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  }
  .main-nav.is-open { opacity: 1; transform: translateY(0); visibility: visible; }
  .main-nav a { width: 100%; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .main-nav .nav-cta-mobile {
    display: block; margin-top: 18px; text-align: center;
    background: var(--navy); color: var(--white); padding: 14px; border: none;
  }
  .header-cta { display: none; }
  .nav-toggle { display: flex; }
}
.nav-cta-mobile { display: none; }

.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: rotate(45deg) translate(4px, 4px); }
.nav-toggle[aria-expanded="true"] span::after { transform: rotate(-45deg) translate(4px, -4px); }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 600; font-size: 0.9rem; letter-spacing: 0.01em;
  padding: 14px 26px; border: 1px solid transparent; cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn--primary { background: var(--navy); color: var(--white); border-color: var(--navy); }
.btn--primary:hover { background: var(--navy-soft); }
.btn--ghost { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn--ghost:hover { background: var(--navy); color: var(--white); }
.btn--ghost-light { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.55); }
.btn--ghost-light:hover { background: var(--white); color: var(--navy); }
.btn-row { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  background:
    linear-gradient(rgba(20,33,45,0.94), rgba(20,33,45,0.97)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 62px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.035) 0 1px, transparent 1px 62px);
  color: var(--white);
  overflow: hidden;
  padding: clamp(60px, 11vw, 120px) 0 clamp(46px, 7vw, 88px);
  border-bottom: 3px solid var(--bronze);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } }

.hero-eyebrow { font-family: var(--font-display); font-weight: 700; font-size: 0.82rem; letter-spacing: 0.03em; color: var(--bronze-light); margin-bottom: 16px; }
.hero-tagline { font-size: 0.92rem; color: rgba(255,255,255,0.7); margin-bottom: 18px; letter-spacing: 0.01em; }
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero p.lede { color: rgba(255,255,255,0.82); font-size: 1.06rem; max-width: 48ch; margin-bottom: 26px; }

.hero-diagram svg { width: 100%; height: auto; }
.hero-draw {
  stroke-dasharray: 1000; stroke-dashoffset: 1000;
  animation: draw-plan 2.2s 0.3s cubic-bezier(.4,.1,.2,1) forwards;
}
@keyframes draw-plan { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) { .hero-draw { stroke-dashoffset: 0; animation: none; } }

/* =========================================================
   Numbered cards (Core Capabilities, Our Approach)
   ========================================================= */
.numbered-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 860px) { .numbered-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .numbered-grid { grid-template-columns: 1fr; } }

.numbered-card { background: var(--paper); padding: 30px 26px; display: flex; flex-direction: column; }
.numbered-card .num {
  font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; color: var(--bronze);
  border-top: 2px solid var(--bronze); display: inline-block; padding-top: 8px; margin-bottom: 16px; width: 30px;
}
.numbered-card h4 { margin-bottom: 8px; }
.numbered-card p { font-size: 0.92rem; color: var(--steel); margin-bottom: 14px; }
.numbered-card .text-link { margin-top: auto; }

/* Dark variant, used on section--dark backgrounds */
.numbered-grid--dark { background: var(--line-on-dark); border-color: var(--line-on-dark); }
.numbered-grid--dark .numbered-card { background: var(--navy); }
.numbered-grid--dark .numbered-card h4 { color: var(--white); }
.numbered-grid--dark .numbered-card p { color: rgba(255,255,255,0.68); }

/* =========================================================
   Project preview cards (Home)
   ========================================================= */
.project-preview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 900px) { .project-preview-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .project-preview-grid { grid-template-columns: 1fr; } }

.preview-card { background: var(--paper); padding: 28px 24px; }
.preview-card .cat-tag { font-family: var(--font-display); font-size: 0.7rem; font-weight: 700; color: var(--bronze); letter-spacing: 0.02em; display: block; margin-bottom: 12px; }
.preview-card h4 { margin-bottom: 10px; }
.preview-card .meta { font-size: 0.86rem; color: var(--steel); }
.preview-card .meta span { display: block; margin-bottom: 2px; }

/* =========================================================
   Full project cards (Projects page)
   ========================================================= */
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 760px) { .project-grid { grid-template-columns: 1fr; } }

.project-card { background: var(--paper); padding: 32px; display: flex; flex-direction: column; }
.project-card .cat-tag { font-family: var(--font-display); font-size: 0.7rem; font-weight: 700; color: var(--bronze); letter-spacing: 0.02em; margin-bottom: 14px; display: block; }
.project-card h3 { margin-bottom: 6px; }
.project-card .client { font-size: 0.88rem; color: var(--steel); margin-bottom: 16px; }
.project-card .meta-row { display: flex; gap: 20px; flex-wrap: wrap; font-size: 0.84rem; color: var(--steel); margin-bottom: 16px; }
.project-card .meta-row strong { color: var(--ink); font-weight: 600; }
.project-card p.desc { font-size: 0.93rem; color: var(--ink); margin-bottom: 16px; }

.photo-placeholder {
  border: 1px dashed var(--line);
  background: repeating-linear-gradient(45deg, transparent 0 10px, rgba(168,124,51,0.08) 10px 11px);
  padding: 22px;
  font-size: 0.82rem;
  color: var(--steel);
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.photo-placeholder svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--bronze); }

/* =========================================================
   Sectors grid
   ========================================================= */
.sector-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 700px) { .sector-list { grid-template-columns: 1fr; } }
.sector-tile { background: var(--paper); padding: 30px 28px; }
.sector-tile .num { font-family: var(--font-display); font-weight: 700; font-size: 0.8rem; color: var(--bronze); display: block; margin-bottom: 10px; }
.sector-tile h4 { margin-bottom: 10px; }
.sector-tile p { font-size: 0.92rem; color: var(--steel); margin-bottom: 0; }

/* =========================================================
   Split layout (About-style two-column)
   ========================================================= */
.split { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 54px; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 30px; } }
.split-label { font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; color: var(--bronze); }

/* =========================================================
   Service entries (Services page)
   ========================================================= */
.service-entry { padding: 32px 0; border-bottom: var(--rule); display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 28px; }
.service-entry:first-of-type { border-top: var(--rule); }
@media (max-width: 760px) { .service-entry { grid-template-columns: 1fr; gap: 10px; } }
.service-entry .num { font-family: var(--font-display); font-weight: 700; font-size: 0.8rem; color: var(--bronze); }
.service-entry h3 { font-size: 1.12rem; margin-top: 6px; }
.service-entry p { color: var(--steel); font-size: 0.94rem; margin-bottom: 0; }

/* =========================================================
   Leadership block (About page)
   ========================================================= */
.leadership { display: grid; grid-template-columns: 0.4fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 700px) { .leadership { grid-template-columns: 1fr; } }
.leadership-mark {
  width: 92px; height: 92px; border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 1.6rem; color: var(--navy);
  position: relative;
}
.leadership-mark::before, .leadership-mark::after { content: ""; position: absolute; width: 12px; height: 12px; }
.leadership-mark::before { top: -1px; left: -1px; border-top: 2px solid var(--bronze); border-left: 2px solid var(--bronze); }
.leadership-mark::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--bronze); border-right: 2px solid var(--bronze); }
.leadership-name { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--navy); }
.leadership-role { font-size: 0.86rem; color: var(--bronze); margin-top: 2px; margin-bottom: 14px; display: block; }

/* =========================================================
   CTA banner
   ========================================================= */
.cta-banner { background: var(--navy); color: var(--white); padding: clamp(46px, 7.5vw, 80px) 0; }
.cta-banner h2 { color: var(--white); margin-bottom: 10px; max-width: 34ch; }
.cta-banner p { color: rgba(255,255,255,0.76); margin-bottom: 22px; }

/* =========================================================
   Contact page
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 54px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 34px; } }

.contact-fact { padding: 18px 0; border-bottom: var(--rule); }
.contact-fact:first-child { border-top: var(--rule); }
.contact-fact .label { font-size: 0.78rem; color: var(--steel); display: block; margin-bottom: 4px; }
.contact-fact .value { font-family: var(--font-display); font-weight: 700; font-size: 1.03rem; color: var(--navy); }

.form-field { margin-bottom: 22px; }
.form-field label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--navy); margin-bottom: 8px; }
.form-field input, .form-field textarea {
  width: 100%; border: 1px solid var(--line); background: var(--white);
  padding: 13px 14px; font-family: var(--font-body); font-size: 0.95rem; color: var(--ink);
}
.form-field input:focus, .form-field textarea:focus { border-color: var(--bronze); outline: none; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 560px) { .form-row-2 { grid-template-columns: 1fr; } }

.form-status { margin-top: 14px; font-size: 0.88rem; display: none; }
.form-status.is-visible { display: block; }
.form-status.success { color: #3B6B4A; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--navy); color: rgba(255,255,255,0.75); padding: 60px 0 30px; border-top: 4px solid var(--bronze); }
.footer-top { display: grid; grid-template-columns: 1.3fr 0.7fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid var(--line-on-dark); }
@media (max-width: 760px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-top { grid-template-columns: 1fr; } }

.footer-logo {
  display: block; height: 54px; width: auto;
  background: var(--paper); padding: 10px 14px; border-radius: 3px;
  margin-bottom: 16px;
}
.footer-brand p { color: rgba(255,255,255,0.6); font-size: 0.87rem; margin-top: 10px; max-width: 30ch; }

.footer-col h5 { font-family: var(--font-display); color: var(--white); font-size: 0.8rem; margin-bottom: 16px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 10px; font-size: 0.89rem; }
.footer-col a:hover { color: var(--bronze-light); }

.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 22px; font-size: 0.79rem; color: rgba(255,255,255,0.5); }

/* =========================================================
   Secondary page hero
   ========================================================= */
.page-hero { background: var(--navy); color: var(--white); padding: clamp(52px, 8vw, 84px) 0 clamp(38px, 6vw, 60px); }
.page-hero h1 { color: var(--white); font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
.page-hero p { color: rgba(255,255,255,0.78); max-width: 54ch; margin-top: 14px; }
.page-hero .kicker { color: var(--bronze-light); font-family: var(--font-display); font-weight: 700; font-size: 0.8rem; display: block; margin-bottom: 14px; }