/* ===== BLACKBEAR INDUSTRIAL HEAVY-DUTY DESIGN SYSTEM ===== */
:root {
  --color-bg: #121214;
  --color-bg-card: #1c1c20;
  --color-bg-card-alt: #26262c;
  --color-border: #33333b;
  --color-border-accent: #d97706;

  --color-amber: #d97706;
  --color-amber-light: #f59e0b;
  --color-amber-bg: rgba(217, 119, 6, 0.12);

  --color-text: #f4f4f5;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;

  --max-width: 1200px;
  --pad: clamp(16px, 4vw, 32px);
  --section-padding: clamp(60px, 10vw, 120px);

  --radius: 6px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  overflow-x: hidden;
}

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

a {
  color: var(--color-amber-light);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-amber);
}

ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

/* TYPOGRAPHY */
.tag-stamp {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-amber);
  background: var(--color-amber-bg);
  border: 1px solid var(--color-amber);
  padding: 4px 14px;
  border-radius: var(--radius);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 580px;
  line-height: 1.7;
}

.text-center { text-align: center; }
.text-center .section-desc { margin: 0 auto; }

.highlight-amber {
  color: var(--color-amber-light);
}

/* BUTTONS */
.btn-industrial {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 32px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}

.btn-amber {
  background: var(--color-amber);
  color: #121214;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(217, 119, 6, 0.3);
}

.btn-amber:hover {
  background: var(--color-amber-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(217, 119, 6, 0.45);
  color: #121214;
}

.btn-steel {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-steel:hover {
  border-color: var(--color-amber);
  background: var(--color-amber-bg);
  color: var(--color-amber-light);
  transform: translateY(-2px);
}

/* HEADER */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(18, 18, 20, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-symbol {
  color: var(--color-amber);
  font-size: 1.4rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 8px 16px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.nav a:hover {
  color: var(--color-text);
}

.nav .btn-amber {
  margin-left: 8px;
  padding: 9px 20px;
  font-size: 0.95rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* MOBILE NAV */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(18, 18, 20, 0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.mobile-nav.open { display: flex; }

.mobile-nav a {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.mobile-nav .close-btn {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 2rem;
  cursor: pointer;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 90px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 20px;
}

.hero-p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-amber-light);
}

.stat-txt {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.hero-img-box {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--color-border);
  aspect-ratio: 4/3;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.hero-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* TICKER BAR */
.ticker-bar {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
}

.ticker-flex {
  display: flex;
  justify-content: space-around;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ticker-item span { color: var(--color-amber); }

/* SERVICES GRID */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 44px;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-amber);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.service-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--color-amber);
  margin-bottom: 12px;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  line-height: 1.75;
}

/* BEFORE / AFTER FLUE DIAGNOSTIC COMPARISON SHOWCASE */
.showcase-section {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.showcase-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 44px;
  align-items: center;
}

.showcase-img-wrapper {
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.showcase-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.showcase-details h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.showcase-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.showcase-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.showcase-item .bullet {
  color: var(--color-amber);
  font-size: 1.1rem;
}

/* INTERACTIVE BOOKING TIME SLOT SELECTOR WIDGET */
.booking-widget-box {
  background: var(--color-bg-card-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 24px;
}

.slot-label {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  display: block;
}

.slots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.slot-btn {
  padding: 12px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  text-align: center;
  cursor: pointer;
  border-radius: var(--radius);
  transition: var(--transition);
}

.slot-btn:hover, .slot-btn.active {
  border-color: var(--color-amber);
  background: var(--color-amber-bg);
  color: var(--color-amber-light);
  font-weight: 600;
}

/* WHY US */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 44px;
  align-items: center;
}

.why-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.why-card {
  padding: 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-amber);
  border-radius: var(--radius);
}

.why-card h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.why-card p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

/* REVIEWS */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 44px;
}

.review-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 22px;
}

.stars { color: var(--color-amber); margin-bottom: 12px; }

.review-txt {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}

.author-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text);
}

.author-loc {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* CTA BANNER */
.cta-banner {
  background: linear-gradient(135deg, var(--color-amber-bg), rgba(18, 18, 20, 0.9));
  border: 1px solid var(--color-amber);
  border-radius: var(--radius);
  padding: 52px 32px;
  text-align: center;
}

.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

/* MAP & AREAS */
.map-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 44px;
  align-items: start;
}

.map-frame {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.map-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
  filter: grayscale(0.6) brightness(0.8) contrast(1.2);
}

.areas-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.area-box {
  padding: 12px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.area-box span { color: var(--color-amber); }

/* CONTACT FORM */
.contact-section {
  background: var(--color-bg-card);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 44px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-item p, .contact-item a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.contact-form {
  background: var(--color-bg-card-alt);
  border: 1px solid var(--color-border);
  padding: 32px;
  border-radius: var(--radius);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  color: var(--color-text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--color-amber);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 22px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.form-consent input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-amber);
  margin-top: 2px;
}

.contact-form .btn-amber {
  width: 100%;
  justify-content: center;
}

/* FOOTER */
.footer {
  padding: 56px 0 24px;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.84rem;
  max-width: 280px;
}

.footer-col h5 {
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  color: var(--color-text-muted);
  font-size: 0.84rem;
}

.footer-col a:hover {
  color: var(--color-amber-light);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

/* REVEAL ANIMATIONS */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--transition), transform 0.6s var(--transition);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-p { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-img-box { max-width: 480px; margin: 0 auto; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-box { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .map-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-toggle { display: block; }
  .services-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .slots-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .areas-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}