/* ========================================================================
   The Furnace Guy — Design Tokens + Component Styles
   Art direction: Dark charcoal/slate + warm red-orange (fire/heat theme)
   ======================================================================== */

/* --- Design Tokens --- */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Arial Black', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* === Custom palette: Dark charcoal + warm red-orange === */
  /* Surfaces */
  --color-bg:             #1a1a1f;
  --color-surface:        #222228;
  --color-surface-2:      #2a2a31;
  --color-surface-offset: #1e1e24;
  --color-divider:        #333340;
  --color-border:         #3a3a48;

  /* Text */
  --color-text:           #e8e6e3;
  --color-text-muted:     #9a9898;
  --color-text-faint:     #666668;

  /* Accent — warm red-orange (fire) */
  --color-accent:         #e85d30;
  --color-accent-hover:   #d44a20;
  --color-accent-active:  #bf3c15;
  --color-accent-light:   #f2a050;
  --color-accent-glow:    rgba(232, 93, 48, 0.15);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}


/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}


/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  line-height: 1;
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-6);
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}
.btn--primary:active {
  background: var(--color-accent-active);
  transform: translateY(0);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}
.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--lg {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-lg);
}
.btn--xl {
  font-size: var(--text-lg);
  padding: var(--space-5) var(--space-10);
  border-radius: var(--radius-lg);
}


/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(26, 26, 31, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.header__nav ul {
  display: flex;
  gap: var(--space-8);
}
.header__nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.header__nav a:hover {
  color: var(--color-text);
}

.header__cta {
  font-size: var(--text-sm);
}

.header__menu-btn {
  display: none;
  color: var(--color-text);
  padding: var(--space-2);
}

/* Mobile nav */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: rgba(26, 26, 31, 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-nav.is-open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-nav ul {
  text-align: center;
}
.mobile-nav li {
  margin-bottom: var(--space-8);
}
.mobile-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
}
.mobile-nav a:hover {
  color: var(--color-accent);
}
.mobile-nav__cta {
  margin-top: var(--space-8);
  font-size: var(--text-base);
  justify-content: center;
  width: 100%;
}


/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 31, 0.92) 0%,
    rgba(26, 26, 31, 0.75) 40%,
    rgba(26, 26, 31, 0.55) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-32) var(--space-6) var(--space-16);
  width: 100%;
}

.hero__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-glow);
  border-radius: var(--radius-full);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-3xl);
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  max-width: 14ch;
}

.hero__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}


/* --- Section styles --- */
.section-header {
  text-align: left;
  margin-bottom: var(--space-12);
}

.section-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 55ch;
  line-height: 1.7;
}


/* --- Services --- */
.services {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-bg);
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.service-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.service-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  padding: 0;
  overflow: hidden;
}
.service-card--featured .service-card__image {
  overflow: hidden;
}
.service-card--featured .service-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.service-card--featured:hover .service-card__image img {
  transform: scale(1.03);
}
.service-card--featured .service-card__content {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.service-card__icon {
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.service-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* --- Why Us --- */
.why-us {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-surface);
}

.why-us__layout {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-16);
  align-items: start;
}

.why-us__features {
  margin-top: var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.feature {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.feature__check {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-accent-glow);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.feature h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.feature p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Stats */
.why-us__stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: sticky;
  top: 6rem;
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}
.stat-card__number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}
.stat-card__suffix {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-accent);
}
.stat-card__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}


/* --- Service Area --- */
.service-area {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-bg);
}

.service-area__grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.area-card {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}
.area-card svg {
  color: var(--color-accent);
  flex-shrink: 0;
}
.area-card--more {
  background: var(--color-accent-glow);
  border-color: transparent;
  color: var(--color-accent);
  font-weight: 600;
}


/* --- Contact --- */
.contact {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-surface);
}

.contact__inner {
  background: linear-gradient(135deg, var(--color-accent) 0%, #c03a10 100%);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 5vw, var(--space-16));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.contact__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: #fff;
  margin-bottom: var(--space-3);
}
.contact__desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-base);
  max-width: 45ch;
  line-height: 1.6;
}

.contact__actions {
  text-align: center;
  flex-shrink: 0;
}
.contact__actions .btn {
  background: #fff;
  color: var(--color-accent);
  font-weight: 700;
}
.contact__actions .btn:hover {
  background: #f0f0f0;
  transform: translateY(-2px);
}

.contact__hours {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.7);
}


/* --- Footer --- */
.footer {
  padding: var(--space-8) 0;
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-border);
}

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

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer__info {
  text-align: right;
}
.footer__info p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer__links {
  margin-top: var(--space-1);
}
.footer__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-xs);
}
.footer__links a:hover {
  color: var(--color-accent);
}
.footer__sep {
  margin: 0 var(--space-2);
  color: var(--color-text-faint);
}


/* --- Floating CTA (mobile) --- */
.floating-cta {
  display: none;
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 90;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(232, 93, 48, 0.4);
  animation: pulse-glow 2.5s ease-in-out infinite;
}
.floating-cta svg {
  width: 24px;
  height: 24px;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 20px rgba(232, 93, 48, 0.4); }
  50% { box-shadow: 0 4px 30px rgba(232, 93, 48, 0.65); }
}


/* --- Scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ========================================================================
   Responsive
   ======================================================================== */

@media (max-width: 900px) {
  .header__nav { display: none; }
  .header__cta { display: none; }
  .header__menu-btn { display: block; }
  .floating-cta { display: flex; }

  .hero__content {
    padding-top: var(--space-24);
  }
  .hero__title {
    font-size: var(--text-2xl);
  }

  .services__grid {
    grid-template-columns: 1fr;
  }
  .service-card--featured {
    grid-template-columns: 1fr;
  }
  .service-card--featured .service-card__image {
    max-height: 240px;
  }

  .why-us__layout {
    grid-template-columns: 1fr;
  }
  .why-us__stats {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
  .stat-card {
    padding: var(--space-5);
  }
  .stat-card__number {
    font-size: var(--text-xl);
  }

  .contact__inner {
    flex-direction: column;
    text-align: center;
  }
  .contact__desc {
    margin: 0 auto;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
  .footer__info {
    text-align: center;
  }
}

@media (max-width: 600px) {
  .hero__actions {
    flex-direction: column;
  }
  .hero__actions .btn {
    justify-content: center;
  }

  .why-us__stats {
    grid-template-columns: 1fr;
  }

  .service-area__grid {
    gap: var(--space-3);
  }

  .area-card {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-4);
  }

  .footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }
  .footer__sep {
    display: none;
  }
}