/* ==========================================================================
   Blacktail Mechanical Design and Solutions — Site Styles
   --------------------------------------------------------------------------
   Organized top-to-bottom:
     1. Design tokens (:root variables) — colors, fonts, spacing
     2. Base / resets
     3. Layout helpers (containers, sections)
     4. Navigation
     5. Buttons
     6. Hero + trust bar
     7. Section headings (the orange "weld-line" accent)
     8. Cards / grids
     9. Page-specific blocks (services, about, contact, portfolio, faq)
    10. Footer
    11. Responsive (mobile) rules at the bottom
   A "token" is just a named value you reuse everywhere. Change it once
   here and it updates across the whole site.
   ========================================================================== */

/* 1. DESIGN TOKENS ---------------------------------------------------------- */
:root {
  /* Colors (from brand spec) */
  --color-bg:           #111111;  /* deep black base */
  --color-surface:      #1E1E1E;  /* cards / raised sections */
  --color-border:       #2E2E2E;  /* subtle dividers */
  --color-text:         #F5F5F5;  /* near-white body text */
  --color-text-muted:   #A0A0A0;  /* steel grey labels/captions */
  --color-accent:       #E87722;  /* industrial orange */
  --color-accent-hover: #FF8C3A;  /* lighter orange on hover */

  /* Fonts */
  --font-display: 'Oswald', sans-serif;     /* headlines */
  --font-body:    'Inter', sans-serif;      /* paragraphs */
  --font-accent:  'Montserrat', sans-serif; /* labels / taglines */

  /* Font sizes. clamp(min, preferred, max) = fluid type that scales with
     screen width but never gets too small or too big. */
  --font-hero:   clamp(2.5rem, 6vw, 4.5rem);
  --font-h1:     clamp(2rem, 4vw, 3rem);
  --font-h2:     clamp(1.5rem, 3vw, 2rem);
  --font-h3:     1.25rem;
  --font-body-size: 1rem;
  --font-small:  0.875rem;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Layout */
  --max-width:     1200px;
  --border-radius: 4px;
  --transition:    0.25s ease;
}

/* 2. BASE / RESET ----------------------------------------------------------- */
/* box-sizing: border-box makes width/padding math predictable. */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-body-size);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: 0.5px;
  margin: 0 0 var(--space-sm);
}

p { margin: 0 0 var(--space-sm); }

/* 3. LAYOUT HELPERS --------------------------------------------------------- */
/* .container centers content and caps its width on big screens. */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* A standard vertical-padding section. */
.section { padding: var(--space-xl) 0; }
.section--tight { padding: var(--space-lg) 0; }

/* Alternating background to separate sections visually. */
.section--surface { background-color: var(--color-surface); }

/* 4. NAVIGATION ------------------------------------------------------------- */
.navbar {
  position: sticky;       /* stays pinned to the top as you scroll */
  top: 0;
  z-index: 100;
  background-color: rgba(17, 17, 17, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* The logo art is black on transparent; invert(1) flips it to white so it
   reads on the dark header. brightness keeps it crisp. */
.nav-logo img {
  width: 250px;
  height: auto;
  filter: invert(1) brightness(1.6);
}

/* Logo + tagline grouped together on the left of the header. */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
/* Tagline stacked beside the logo, with an orange weld-line divider. */
.nav-tagline {
  display: flex;
  flex-direction: column;
  padding-left: var(--space-sm);
  border-left: 2px solid var(--color-accent);
  line-height: 1.25;
}
.nav-tagline-main {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-text);
}
.nav-tagline-coram {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 1px;
  color: var(--color-text-muted);
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-text);
  font-family: var(--font-accent);
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--color-accent); }

/* The "Get a Quote" call-to-action button in the nav. */
.nav-cta {
  background-color: var(--color-accent);
  color: var(--color-bg) !important;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius);
}
.nav-cta:hover { background-color: var(--color-accent-hover); }

/* Hamburger button — hidden on desktop, shown on mobile (see bottom). */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.6rem;
  cursor: pointer;
}

/* 5. BUTTONS ---------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-accent);
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition);
  border: 2px solid transparent;
}
.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}
.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-bg);
  transform: translateY(-2px);
}
.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

/* 6. HERO + TRUST BAR ------------------------------------------------------- */
.hero {
  /* Layered background = (1) orange glow, (2) fine diagonal "brushed metal"
     grain, (3) dark base gradient. To use a real photo later, add it as the
     FIRST layer, e.g.:
       background-image:
         linear-gradient(rgba(17,17,17,0.78), rgba(17,17,17,0.92)),
         url('images/hero.jpg');
       background-size: cover; background-position: center;
     The dark gradient on top keeps the headline readable over any photo. */
  background:
    /* Dark overlay (top layer) keeps text readable over the photo below. */
    linear-gradient(180deg, rgba(17, 17, 17, 0.80), rgba(17, 17, 17, 0.92)),
    /* Real fabrication photo (free commercial license, Pexels). Swap this
       file at images/hero.jpg anytime to change the banner. */
    url('../images/hero.jpg');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}
/* Subtle shadow so the headline pops off the photo. */
.hero h1 { text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6); }
.hero .subhead { text-shadow: 0 1px 8px rgba(0, 0, 0, 0.7); }
.hero h1 {
  font-size: var(--font-hero);
  font-weight: 700;
  max-width: 18ch;
  margin: 0 auto var(--space-md);
}
.hero .subhead {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  max-width: 60ch;
  margin: 0 auto var(--space-md);
}

/* Steel-grey trust bar with pipe-separated tags. */
.trust-bar {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 0.5px;
}
.trust-bar .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs) var(--space-md);
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}
.trust-bar span { white-space: nowrap; }
.trust-bar .accent { color: var(--color-accent); }

/* 7. SECTION HEADINGS — the orange "weld-line" accent ----------------------- */
.section-label {
  font-family: var(--font-accent);
  font-size: var(--font-small);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-xs);
}

/* Headings with a vertical orange bar on the left, like a weld line. */
.section-title {
  font-size: var(--font-h1);
  padding-left: var(--space-sm);
  border-left: 4px solid var(--color-accent);
}
.section-title--center {
  border-left: none;
  padding-left: 0;
  text-align: center;
}
.section-title--center .section-label { display: block; }

.lead {
  color: var(--color-text-muted);
  font-size: 1.125rem;
  max-width: 65ch;
}

/* 8. CARDS / GRIDS ---------------------------------------------------------- */
/* auto-fit grid: as many columns as fit, each at least 280px wide. */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);  /* orange accent edge */
  border-radius: var(--border-radius);
  padding: var(--space-md);
  transition: transform var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(232, 119, 34, 0.15);  /* soft orange glow */
}
.card h3 {
  font-size: var(--font-h3);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.card p { color: var(--color-text-muted); margin: 0; }

/* 9. PAGE-SPECIFIC BLOCKS --------------------------------------------------- */

/* Generic page header used on inner pages (Services, About, etc.). */
.page-header {
  background:
    linear-gradient(135deg, rgba(232, 119, 34, 0.10), transparent 50%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.018) 0 2px, transparent 2px 9px),
    linear-gradient(180deg, #1c1c1c, var(--color-bg));
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
  text-align: center;
}
.page-header h1 { font-size: var(--font-h1); margin: 0 auto var(--space-sm); }
.page-header .subhead { color: var(--color-text-muted); max-width: 65ch; margin: 0 auto; }

/* Detailed service blocks on the Services page. */
.service-block {
  border-left: 4px solid var(--color-accent);
  padding-left: var(--space-md);
  margin-bottom: var(--space-lg);
}
.service-block h2 { font-size: var(--font-h2); }
.service-block .tagline {
  font-family: var(--font-accent);
  font-style: italic;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.service-block .ideal-for,
.service-block .note {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-sm);
  font-size: var(--font-small);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}
.service-block .ideal-for strong,
.service-block .note strong { color: var(--color-text); }

/* About page narrative width for comfortable reading. */
.prose { max-width: 70ch; }
.prose p { color: var(--color-text); }

/* About-page photo that text wraps around (floats right on desktop). */
.about-figure {
  float: right;
  width: 280px;
  max-width: 42%;
  margin: 0 0 var(--space-sm) var(--space-md);
}
.about-figure img {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  display: block;
}
.about-figure figcaption {
  font-family: var(--font-accent);
  font-style: italic;
  font-size: var(--font-small);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-xs);
}
@media (max-width: 820px) {
  /* On phones, don't float — let it sit full-width above the text. */
  .about-figure { float: none; width: 100%; max-width: 100%; margin: 0 0 var(--space-md); }
}

/* Coram Deo italic closing line. */
.coram {
  font-family: var(--font-accent);
  font-style: italic;
  color: var(--color-text-muted);
  font-size: var(--font-small);
}
.signature {
  font-family: var(--font-accent);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* Centered call-to-action band. */
.cta-band {
  text-align: center;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.cta-band h2 { font-size: var(--font-h1); }
.cta-band p { color: var(--color-text-muted); max-width: 55ch; margin: 0 auto var(--space-md); }

/* Contact page: form + side info side by side. */
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.form-group { margin-bottom: var(--space-sm); }
.form-group label {
  display: block;
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 0.5px;
  margin-bottom: var(--space-xs);
}
.form-group label .req { color: var(--color-accent); }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-body-size);
  padding: 0.75rem;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}
.form-group textarea { min-height: 160px; resize: vertical; }

/* Contact form success/error banners (toggled by js/main.js). */
.form-message {
  border-radius: var(--border-radius);
  padding: var(--space-sm);
  margin-top: var(--space-sm);
  font-family: var(--font-accent);
}
.form-message[hidden] { display: none; }
.form-message--success {
  background-color: rgba(232, 119, 34, 0.12);
  border: 1px solid var(--color-accent);
  color: var(--color-text);
}
.form-message--error {
  background-color: rgba(200, 60, 60, 0.12);
  border: 1px solid #c83c3c;
  color: var(--color-text);
}

.contact-info {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--border-radius);
  padding: var(--space-md);
}
.contact-info h3 { font-size: var(--font-h3); }
.contact-info p { color: var(--color-text-muted); margin-bottom: var(--space-xs); }

/* Numbered "what happens next" list. */
.steps { list-style: none; padding: 0; counter-reset: step; }
.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.75rem;
  height: 1.75rem;
  background-color: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-display);
  font-weight: 700;
  border-radius: var(--border-radius);
  display: grid;
  place-items: center;
}

/* Portfolio filter bar + project cards. */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-sm);
  margin-bottom: var(--space-lg);
}
.filter-btn {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 0.5px;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover,
.filter-btn.is-active {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.project-card .photo-placeholder {
  background-color: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--border-radius);
  height: 180px;
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  font-family: var(--font-accent);
  font-size: var(--font-small);
  margin-bottom: var(--space-sm);
}
/* Real project photo: fills a fixed area, cropped to fit (object-fit: cover). */
.project-card .project-photo {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--border-radius);
  margin-bottom: var(--space-sm);
  background-color: var(--color-bg);
  cursor: pointer;            /* signals it's clickable to open the gallery */
}
/* "View photos" link under each project photo. */
.gallery-trigger {
  display: inline-block;
  background: none;
  border: none;
  color: var(--color-accent);
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 0.5px;
  cursor: pointer;
  padding: 0;
  margin-bottom: var(--space-sm);
}
.gallery-trigger:hover { color: var(--color-accent-hover); }
.project-card h3 { font-size: var(--font-h3); }
.project-card .case-row { margin-bottom: var(--space-xs); }
.project-card .case-row strong {
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
}
.tags { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-sm); }
.tag {
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 0.25rem 0.6rem;
  border-radius: var(--border-radius);
}

/* --- Lightbox gallery (full-screen photo viewer) --- */
.lightbox {
  position: fixed;
  inset: 0;                       /* cover the whole screen */
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}
.lightbox[hidden] { display: none; }   /* hidden attribute wins over flex */
.lightbox-img {
  max-width: 90vw;
  max-height: 76vh;
  object-fit: contain;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}
.lightbox-caption {
  color: var(--color-text);
  font-family: var(--font-accent);
  text-align: center;
  max-width: 70ch;
  margin: var(--space-sm) 0 0;
}
.lightbox-counter {
  color: var(--color-text-muted);
  font-size: var(--font-small);
  margin: var(--space-xs) 0 0;
}
.lightbox button {
  position: absolute;
  background: rgba(30, 30, 30, 0.85);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  font-size: 2rem;
  line-height: 1;
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  border-radius: var(--border-radius);
  transition: background-color var(--transition), color var(--transition);
}
.lightbox button:hover { background: var(--color-accent); color: var(--color-bg); }
.lightbox-close { top: var(--space-md); right: var(--space-md); }
.lightbox-prev { left: var(--space-md); top: 50%; transform: translateY(-50%); }
.lightbox-next { right: var(--space-md); top: 50%; transform: translateY(-50%); }
@media (max-width: 820px) {
  .lightbox button { width: 2.5rem; height: 2.5rem; font-size: 1.5rem; }
  .lightbox-prev { left: var(--space-xs); }
  .lightbox-next { right: var(--space-xs); }
}

/* FAQ — native <details> accordion, styled. */
.faq-category { margin-bottom: var(--space-lg); }
.faq-category > h2 {
  font-size: var(--font-h2);
  padding-left: var(--space-sm);
  border-left: 4px solid var(--color-accent);
}
.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-sm);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  list-style: none;          /* hide default marker */
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  color: var(--color-accent);
  font-size: 1.5rem;
  font-family: var(--font-display);
}
.faq-item[open] summary::after { content: '−'; }
.faq-item .answer {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-muted);
}

/* 10. FOOTER ---------------------------------------------------------------- */
.footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
}
.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md) var(--space-lg);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
}
.footer-brand img { width: 160px; filter: invert(1) brightness(1.6); margin-bottom: var(--space-sm); }
.footer-tagline { font-family: var(--font-display); letter-spacing: 1px; margin: 0; }
.footer-coram { font-family: var(--font-accent); font-style: italic; color: var(--color-text-muted); }
.footer h4 {
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
}
.footer-links ul { list-style: none; padding: 0; margin: 0; }
.footer-links a { color: var(--color-text-muted); }
.footer-links a:hover { color: var(--color-accent); }
.footer-contact p { color: var(--color-text-muted); margin-bottom: var(--space-xs); }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-small);
}
.footer-closing { font-family: var(--font-accent); font-style: italic; margin: 0; }

/* Small utility classes. */
.text-center { text-align: center; }
.mt-md { margin-top: var(--space-md); }

/* SCROLL REVEAL ------------------------------------------------------------ */
/* Elements start slightly lower and transparent; JS adds .is-visible when
   they scroll into view, animating them up into place. */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
/* Accessibility: if the visitor's system asks for reduced motion, show
   everything immediately with no animation. */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* 10b. ADVANCED ENHANCEMENTS ------------------------------------------------ */

/* --- Sharper nav: shrink on scroll + highlight the current page --- */
.navbar { transition: padding var(--transition), background-color var(--transition); }
.nav-container { transition: padding var(--transition); }
.nav-logo img { transition: width var(--transition); }

/* JS adds .scrolled once you scroll down a bit. */
.navbar.scrolled { background-color: rgba(17, 17, 17, 0.97); }
.navbar.scrolled .nav-container { padding-top: var(--space-xs); padding-bottom: var(--space-xs); }
.navbar.scrolled .nav-logo img { width: 200px; }

/* Current page's tab — orange with a small underline accent. */
.nav-links a.active { color: var(--color-accent); }
.nav-links a.active::after {
  content: '';
  display: block;
  height: 2px;
  background-color: var(--color-accent);
  margin-top: 2px;
}

/* --- Stats / credibility band --- */
.stats { background-color: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.stats .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  gap: var(--space-md);
  text-align: center;
}
.stat { flex: 1 1 160px; }
.stat-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  color: var(--color-accent);
  line-height: 1;
}
.stat-number .suffix { font-size: 0.6em; }
.stat-label {
  font-family: var(--font-accent);
  font-size: var(--font-small);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* --- Service card icons --- */
.card-icon {
  width: 52px;
  height: 52px;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}
.card-icon svg { width: 100%; height: 100%; display: block; }

/* 11. RESPONSIVE (MOBILE) --------------------------------------------------- */
/* These rules apply only when the screen is 820px wide or less. */
@media (max-width: 820px) {
  /* Show the hamburger, hide the horizontal links by default. */
  .nav-toggle { display: block; }

  /* Slightly smaller logo so it doesn't crowd the phone header. */
  .nav-logo img { width: 150px; }

  /* Compact tagline beside the logo on phones — smaller text + tighter
     orange weld-line divider so it fits next to the hamburger menu. */
  .nav-tagline { display: flex; padding-left: 0.55rem; }
  .nav-tagline-main { font-size: 0.6rem; letter-spacing: 1px; }
  .nav-tagline-coram { font-size: 0.55rem; }
  .nav-brand { gap: 0.55rem; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    /* Hidden until JS adds the .is-open class. */
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: var(--space-xs) 0; }
  .nav-cta { display: inline-block; margin-top: var(--space-xs); }

  /* Stack the contact and footer columns. */
  .contact-grid { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; gap: var(--space-md); }

  /* Roomier touch targets, less giant spacing. */
  .section { padding: var(--space-lg) 0; }
  .section--tight { padding: var(--space-md) 0; }
}