/* =========================================
   KNIGHT BEARING — STYLES
   Design: Simple, Professional, Industrial
   ========================================= */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Palette — charcoal, grey, white. Gold reserved for logo diamond only. */
  --ink:      #111827;   /* near-black for headings */
  --dark:     #1f2937;   /* charcoal — navbar, footer, dark sections */
  --text:     #374151;   /* primary body text */
  --muted:    #6b7280;   /* secondary / caption text */
  --subtle:   #9ca3af;   /* placeholder, tertiary */
  --rule:     #e5e7eb;   /* borders & dividers */
  --surface:  #f3f4f6;   /* light surface for alternating sections */
  --bg:       #f9fafb;   /* page background */
  --white:    #ffffff;
  --gold:     #c8a84b;   /* logo diamond only */

  --font:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius:   4px;
  --trans:    0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* Remove 300ms tap delay and grey flash on mobile */
a, button, [role="button"] {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* --- Utilities --- */
.container    { max-width: 1160px; margin: 0 auto; padding: 0 32px; }
.section-pad  { padding: 96px 0; }
.bg-dark      { background: var(--dark); color: var(--white); }
.accent       { color: var(--gold); }  /* kept for hero "Trust" span only */

.section-header { text-align: center; margin-bottom: 64px; }
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 14px;
}
.section-header p  { color: var(--muted); max-width: 520px; margin: 0 auto; font-size: 1rem; }
.section-header.light h2 { color: var(--white); }
.section-header.light p  { color: var(--subtle); }

/* Eyebrow label — small all-caps tag above section headings */
.eyebrow {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.section-header.light .eyebrow { color: var(--subtle); }

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--trans);
  border: 1.5px solid transparent;
}
/* Primary — dark charcoal: used on light backgrounds (contact form, etc.) */
.btn-primary {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}
.btn-primary:hover { background: var(--dark); border-color: var(--dark); }

/* On dark backgrounds, invert to white */
.hero .btn-primary,
.cta-section .btn-primary,
.page-hero .btn-primary {
  background: var(--white);
  color: var(--ink);
  border-color: var(--white);
}
.hero .btn-primary:hover,
.cta-section .btn-primary:hover,
.page-hero .btn-primary:hover {
  background: var(--surface);
  border-color: var(--surface);
  color: var(--ink);
}

/* Outline — for secondary actions on dark backgrounds */
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--ink);
  border-color: var(--white);
}

/* Outline on light backgrounds */
.response-card .btn-outline {
  color: var(--ink);
  border-color: var(--rule);
}
.response-card .btn-outline:hover {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}

.btn-sm   { padding: 12px 20px; font-size: 0.8rem; }
.btn-full { width: 100%; text-align: center; }

/* =========================================
   NAVBAR
   ========================================= */
.navbar {
  background: var(--dark);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
}
.logo-icon   { color: var(--gold); font-size: 1.1rem; line-height: 1; flex-shrink: 0; }
.logo-text   { color: var(--white); }
.logo-accent { color: var(--white); opacity: 0.55; }  /* subtle differentiation, not gold */

.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  color: rgba(255, 255, 255, 0.55);
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--trans), background var(--trans);
}
.nav-links a:hover { color: var(--white); }
.nav-links a.active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 14px 12px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 1px;
  transition: all var(--trans);
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* =========================================
   HERO
   ========================================= */
.hero {
  background: var(--ink);
  color: var(--white);
  padding: 136px 32px 112px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
/* Subtle noise/texture using a gradient */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(31, 41, 55, 0.4) 0%, transparent 60%),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 80px,
      rgba(255,255,255,0.012) 80px,
      rgba(255,255,255,0.012) 81px
    );
  pointer-events: none;
}
.hero-content  { max-width: 680px; margin: 0 auto; position: relative; }
.hero-tagline  {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 22px;
  color: var(--white);
}
.hero h1 .accent { color: var(--white); opacity: 0.5; }  /* subtle, not gold */
.hero-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.5);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.8;
}
.hero-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* =========================================
   STATS BAR
   ========================================= */
.stats-bar {
  background: var(--white);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0 32px;
}
.stats-container {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: center;
}
.stat {
  padding: 40px 16px;
  border-right: 1px solid var(--rule);
}
.stat:last-child { border-right: none; }
.stat-number {
  display: block;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
}

/* =========================================
   FEATURE CARDS
   ========================================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;           /* gap between cards = rule-line effect */
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}
.feature-card {
  background: var(--white);
  padding: 40px 32px;
  transition: background var(--trans);
}
.feature-card:hover { background: var(--bg); }
.feature-icon {
  font-size: 1.4rem;
  margin-bottom: 18px;
  color: var(--muted);
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 10px;
}
.feature-card p { color: var(--muted); font-size: 0.93rem; line-height: 1.7; }

/* =========================================
   CTA SECTION
   ========================================= */
.cta-section {
  background: var(--dark);
  color: var(--white);
  text-align: center;
  padding: 96px 32px;
}
.cta-section h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 12px;
}
.cta-section p { color: var(--subtle); margin-bottom: 32px; font-size: 1rem; }

/* =========================================
   PAGE HERO (inner pages)
   ========================================= */
.page-hero {
  background: var(--dark);
  color: var(--white);
  padding: 72px 32px 60px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.page-hero h1 {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 10px;
}
.page-hero p { color: var(--subtle); font-size: 1rem; }

/* =========================================
   ABOUT PAGE
   ========================================= */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.col-text h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 20px;
}
.col-text p { color: var(--muted); margin-bottom: 18px; line-height: 1.8; }

.visual-block {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 420px;
}
.visual-inner { text-align: center; }
.big-icon { font-size: 3.5rem; color: var(--subtle); display: block; margin-bottom: 24px; }
.visual-inner p {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 2.2;
  color: var(--muted);
}

/* Values section */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.value-card {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 32px 24px;
  background: rgba(255,255,255,0.03);
}
.value-card h3 {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 12px;
}
.value-card p { color: rgba(255,255,255,0.45); font-size: 0.92rem; line-height: 1.75; }

/* Industries grid */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(175px, 1fr));
  gap: 12px;
}
.industry-item {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px 14px;
  text-align: center;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--text);
  transition: background var(--trans), color var(--trans), border-color var(--trans);
}
.industry-item:hover {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}

/* =========================================
   PRODUCTS PAGE
   ========================================= */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: border-color var(--trans);
}
.product-card:hover { border-color: #9ca3af; }
.product-icon { font-size: 1.5rem; color: var(--subtle); margin-bottom: 16px; }
.product-card h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 10px;
}
.product-card p  { color: var(--muted); font-size: 0.91rem; margin-bottom: 18px; line-height: 1.7; }
.product-card ul { padding-left: 0; }
.product-card li {
  color: var(--muted);
  font-size: 0.88rem;
  padding: 7px 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 10px;
}
.product-card li:last-child { border-bottom: none; }
.product-card li::before { content: '—'; color: var(--subtle); flex-shrink: 0; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.service-item {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 32px 24px;
  background: rgba(255,255,255,0.03);
}
.service-item h3 {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 12px;
}
.service-item p { color: rgba(255,255,255,0.45); font-size: 0.92rem; line-height: 1.75; }

/* Light variant — used in Additional Services section on white bg */
.service-item-light {
  border: 1px solid var(--rule);
  background: var(--white);
}
.service-item-light h3 { color: var(--ink); }
.service-item-light p  { color: var(--text); }

/* =========================================
   CONTACT PAGE
   ========================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact-form-wrap h2,
.contact-info-wrap h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 28px;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--white);
  transition: border-color var(--trans), box-shadow var(--trans);
  appearance: auto;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--subtle); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--text);
  box-shadow: 0 0 0 3px rgba(55, 65, 81, 0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-note {
  font-size: 0.78rem;
  color: var(--subtle);
  text-align: center;
  margin-top: 2px;
  letter-spacing: 0.02em;
}
.form-success {
  text-align: center;
  padding: 56px 24px;
  background: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}
.success-icon { font-size: 2.5rem; color: #16a34a; margin-bottom: 14px; }
.form-success h3 { font-size: 1.3rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.form-success p  { color: var(--muted); }

/* Contact info panel */
.info-card {
  background: var(--dark);
  border-radius: var(--radius);
  padding: 36px 32px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.info-item { display: flex; gap: 16px; align-items: flex-start; }
.info-icon {
  font-size: 1.1rem;
  color: var(--subtle);
  width: 24px;
  text-align: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.info-item h4 {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-bottom: 5px;
}
.info-item p  { color: rgba(255,255,255,0.75); font-size: 0.93rem; line-height: 1.65; }

.response-card {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--white);
}
.response-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}
.response-card p  { color: var(--muted); font-size: 0.91rem; margin-bottom: 18px; line-height: 1.7; }

/* =========================================
   FOOTER
   ========================================= */
.footer {
  background: var(--ink);
  color: var(--muted);
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px 48px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.3);
  max-width: 240px;
  line-height: 1.7;
}
.footer-links h4,
.footer-contact h4 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 18px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 0; }
.footer-links a {
  display: block;
  padding: 10px 0;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--trans);
}
.footer-links a:hover { color: var(--white); }

.footer-contact p { font-size: 0.88rem; margin-bottom: 8px; color: rgba(255,255,255,0.45); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  padding: 20px 32px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.04em;
}

/* Clickable contact links */
.footer-link,
.info-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--trans);
}
.footer-link:hover { color: rgba(255,255,255,0.85); }
.info-link { color: rgba(255,255,255,0.75); }
.info-link:hover { color: var(--white); }

/* =========================================
   RESPONSIVE — Tablet (≤900px)
   ========================================= */
@media (max-width: 900px) {
  .two-col,
  .contact-layout    { grid-template-columns: 1fr; gap: 40px; }
  .visual-block      { max-width: 100%; aspect-ratio: 16/7; }
  .stats-container   { grid-template-columns: repeat(2, 1fr); }
  .stat              { border-right: none; border-bottom: 1px solid var(--rule); }
  .stat:nth-child(odd)  { border-right: 1px solid var(--rule); }
  .stat:last-child,
  .stat:nth-last-child(2):nth-child(odd) { border-bottom: none; }
  .footer-container  { grid-template-columns: 1fr 1fr; }
  .footer-brand      { grid-column: 1 / -1; }
  .section-pad       { padding: 72px 0; }
}

/* =========================================
   RESPONSIVE — Mobile (≤640px)
   ========================================= */
@media (max-width: 640px) {
  .container { padding: 0 20px; }

  /* Hamburger — shown */
  .hamburger { display: flex; }

  /* Mobile nav dropdown */
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--dark);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px 0 12px;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    display: block;
    padding: 16px 24px;
    border-radius: 0;
    font-size: 0.88rem;
    border-left: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }
  .nav-links a.active  { border-left-color: rgba(255,255,255,0.3); }

  /* Hero */
  .hero { padding: 80px 20px 64px; }
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
    max-width: 300px;
    margin: 0 auto;
  }
  .hero-buttons .btn { text-align: center; }

  /* Stats */
  .stats-container { grid-template-columns: repeat(2, 1fr); }
  .stat            { border-right: none; border-bottom: 1px solid var(--rule); padding: 28px 12px; }
  .stat:nth-child(odd)  { border-right: 1px solid var(--rule); }
  .stat:last-child,
  .stat:nth-last-child(2):nth-child(odd) { border-bottom: none; }

  /* Features grid */
  .features-grid { grid-template-columns: 1fr; }

  /* Prevent iOS auto-zoom on form focus */
  .form-group input,
  .form-group select,
  .form-group textarea { font-size: 16px; }

  .form-row { grid-template-columns: 1fr; }

  .footer-container { grid-template-columns: 1fr; gap: 32px; }
  .section-pad      { padding: 56px 0; }

  .info-link { display: inline-block; padding: 4px 0; }
}