/* === GAS FLOW AUTO CENTRE — Styles === */
/* Design language: raw fabrication craft — gunmetal/ember-orange/arc-weld-blue */

/* --- Google Fonts import --- */
@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700&family=Inter:wght@400;500;600&display=swap');

/* === CSS CUSTOM PROPERTIES === */

/* Light mode (default) */
:root {
  /* Brand colours */
  --color-gunmetal: #1C1E20;
  --color-ember: #E85D2C;
  --color-ember-hover: #D14E22;
  --color-arc-blue: #3FA9E8;
  --color-arc-blue-hover: #2E8FCC;
  --color-steel-grey: #D8D9DA;
  --color-warm-offwhite: #F2F1EF;

  /* Role-based tokens — SURFACES (these flip in dark mode) */
  --surface-page: #FFFFFF;
  --surface-card: #F8F8F8;
  --surface-card-hover: #F0F0F0;
  --surface-header: #FFFFFF;
  --surface-footer: var(--color-gunmetal);

  /* Role-based tokens — TEXT on page surfaces (these flip in dark mode) */
  --text-primary: #1C1E20;
  --text-secondary: #4A4D50;
  --text-muted: #6E7275;

  /* Role-based tokens — TEXT on BRAND backgrounds (stays light in both themes) */
  --text-on-brand: #FFFFFF;
  --text-on-dark: var(--color-warm-offwhite);

  /* Borders and dividers */
  --border-subtle: rgba(28, 30, 32, 0.1);
  --border-medium: rgba(28, 30, 32, 0.2);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Typography */
  --font-heading: 'Barlow Condensed', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
  --border-radius: 6px;
  --border-radius-lg: 12px;
}

/* Dark mode */
[data-theme="dark"] {
  --surface-page: #121416;
  --surface-card: #1E2124;
  --surface-card-hover: #262A2E;
  --surface-header: #1A1C1E;
  --surface-footer: #0D0E10;

  --text-primary: #E8E9EA;
  --text-secondary: #B0B3B6;
  --text-muted: #7D8186;

  /* text-on-brand stays the same — white text on ember/arc-blue buttons, hero, footer */
  --text-on-brand: #FFFFFF;
  --text-on-dark: var(--color-warm-offwhite);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* === RESET & BASE === */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--surface-page);
  transition: background-color 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

a {
  color: var(--color-ember);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 3vw, 1.6rem); }

p {
  margin-bottom: var(--space-md);
}

ul, ol {
  padding-left: var(--space-lg);
}

/* === UTILITY === */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.accent-line {
  width: 60px;
  height: 4px;
  background: var(--color-ember);
  margin: var(--space-md) auto;
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-ember);
  color: var(--text-on-brand);
}

.btn-primary:hover {
  background-color: var(--color-ember-hover);
  color: var(--text-on-brand);
}

.btn-secondary {
  background-color: var(--color-arc-blue);
  color: var(--text-on-brand);
}

.btn-secondary:hover {
  background-color: var(--color-arc-blue-hover);
  color: var(--text-on-brand);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-ember);
  border: 2px solid var(--color-ember);
}

.btn-outline:hover {
  background-color: var(--color-ember);
  color: var(--text-on-brand);
}

/* === HEADER === */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--surface-header);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  transition: background-color 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.site-logo-text {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.site-logo-text .logo-accent {
  color: var(--color-ember);
}

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

.nav-desktop a {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--color-ember);
  border-bottom-color: var(--color-ember);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-phone {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-ember);
  text-decoration: none;
}

.header-phone:hover {
  color: var(--color-ember-hover);
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--border-medium);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--color-ember);
  color: var(--color-ember);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-moon,
[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-sun {
  display: block;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: var(--space-sm);
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--surface-page);
  z-index: 999;
  padding: var(--space-xl);
  flex-direction: column;
  gap: var(--space-lg);
}

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

.nav-mobile a {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--color-ember);
}

.nav-mobile .mobile-phone {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-ember);
  text-decoration: none;
}

/* === HERO === */

.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(28, 30, 32, 0.85) 0%,
    rgba(28, 30, 32, 0.6) 60%,
    rgba(28, 30, 32, 0.4) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 650px;
  padding: var(--space-3xl) var(--space-lg);
}

.hero-content h1 {
  color: var(--text-on-brand);
  margin-bottom: var(--space-md);
}

.hero-content h1 .highlight {
  color: var(--color-ember);
}

.hero-content p {
  color: var(--color-steel-grey);
  font-size: 1.15rem;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* === FEATURES / CAPABILITIES GRID === */

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.capability-card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background-color: var(--surface-card-hover);
}

.capability-card .card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-ember);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--text-on-brand);
}

.capability-card .card-icon svg {
  width: 24px;
  height: 24px;
}

.capability-card h3 {
  margin-bottom: var(--space-sm);
}

.capability-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* === TRACK RECORD / STATS === */

.track-record {
  background-color: var(--color-gunmetal);
  color: var(--text-on-dark);
}

.track-record .section-header h2 {
  color: var(--text-on-brand);
}

.track-record .section-header p {
  color: var(--color-steel-grey);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  text-align: center;
}

.stat-item .stat-number {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-ember);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-item .stat-label {
  font-size: 0.9rem;
  color: var(--color-steel-grey);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === SERVICES === */

.services-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.service-card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.service-card-body {
  padding: var(--space-xl);
}

.service-card-body h3 {
  margin-bottom: var(--space-sm);
}

.service-card-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.service-card-body ul {
  list-style: none;
  padding: 0;
  margin-top: var(--space-md);
}

.service-card-body ul li {
  padding: var(--space-xs) 0;
  padding-left: var(--space-lg);
  position: relative;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.service-card-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--color-ember);
  border-radius: 50%;
}

/* === GALLERY === */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.gallery-item {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item .gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(transparent, rgba(28, 30, 32, 0.85));
  color: var(--text-on-brand);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* === CONTACT === */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
}

.contact-item .contact-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--color-ember);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-on-brand);
}

.contact-item .contact-icon svg {
  width: 20px;
  height: 20px;
}

.contact-item h3 {
  font-size: 1rem;
  margin-bottom: var(--space-xs);
  text-transform: none;
}

.contact-item p, .contact-item a {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-item a:hover {
  color: var(--color-ember);
}

.contact-note {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* Contact form */
.contact-form {
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
}

.contact-form h3 {
  margin-bottom: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  background-color: var(--surface-page);
  border: 1px solid var(--border-medium);
  border-radius: var(--border-radius);
  transition: border-color 0.2s ease, background-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-ember);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--space-md);
  font-style: italic;
}

/* Map */
.map-container {
  margin-top: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.map-container iframe {
  width: 100%;
  height: 350px;
  border: none;
}

/* === FOOTER === */

.site-footer {
  background-color: var(--surface-footer);
  color: var(--text-on-dark);
  padding: var(--space-2xl) 0 var(--space-lg);
}

[data-theme="dark"] .site-footer {
  background-color: #0D0E10;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand .site-logo-text {
  color: var(--text-on-brand);
  font-size: 1.2rem;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  color: var(--color-steel-grey);
  font-size: 0.9rem;
}

.footer-links h4 {
  color: var(--text-on-brand);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer-links ul {
  list-style: none;
  padding: 0;
}

.footer-links ul li {
  margin-bottom: var(--space-sm);
}

.footer-links ul a {
  color: var(--color-steel-grey);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links ul a:hover {
  color: var(--color-ember);
}

.footer-contact a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-steel-grey);
  font-size: 0.9rem;
  margin-bottom: var(--space-sm);
  text-decoration: none;
}

.footer-contact a:hover {
  color: var(--color-ember);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-steel-grey);
}

/* === RESPONSIVE === */

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .header-phone {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero {
    min-height: 60vh;
  }

  .hero-content {
    padding: var(--space-2xl) var(--space-lg);
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .services-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* === SKIP LINK (accessibility) === */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-ember);
  color: var(--text-on-brand);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  z-index: 10000;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

/* === PAGE HERO (inner pages) === */

.page-hero {
  background-color: var(--color-gunmetal);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.page-hero h1 {
  color: var(--text-on-brand);
  margin-bottom: var(--space-sm);
}

.page-hero p {
  color: var(--color-steel-grey);
  font-size: 1.1rem;
  max-width: 550px;
  margin: 0 auto;
}

/* === GALLERY PAGE NOTICE === */

.gallery-notice {
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--border-radius);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-xl);
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}