/* ===================================================================
   Austin Aero Weld — Styles
   Clean, industrial, technical palette
   =================================================================== */

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

:root {
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --black: #0a0a0a;
  --accent: #c45a2c;
  --accent-hover: #a94b24;
  --accent-light: #f4e8e2;
  --blue-dark: #1a2332;
  --blue-mid: #263245;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --header-height: 72px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
}

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

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

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

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--gray-900);
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1rem;
  color: var(--gray-700);
}

.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section--gray {
  background: var(--gray-50);
}

.section--dark {
  background: var(--blue-dark);
  color: var(--gray-200);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--white);
}

.section--dark p {
  color: var(--gray-300);
}

.section--dark .label {
  color: var(--accent);
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  height: var(--header-height);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.header__logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav a:hover,
.nav a.active {
  color: var(--gray-900);
  background: var(--gray-100);
}

.nav__cta {
  background: var(--accent) !important;
  color: var(--white) !important;
  font-weight: 600 !important;
  padding: 0.5rem 1rem !important;
}

.nav__cta:hover {
  background: var(--accent-hover) !important;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--gray-800);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
}

/* --- Hero --- */
.hero {
  background: var(--blue-dark);
  color: var(--white);
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(135deg, rgba(26,35,50,0.95) 0%, rgba(38,50,69,0.85) 100%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero h1 {
  color: var(--white);
  font-size: 3rem;
  max-width: 80%;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1.5rem;
}

.hero p {
  color: var(--gray-300);
  font-size: 1.125rem;
  max-width: 80%;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2rem;
}

.hero .label {
  color: var(--accent);
}

/* Page hero (service pages) */
.page-hero {
  background: var(--blue-dark);
  color: var(--white);
  padding: 4rem 0 3rem;
  text-align: center;
}

.page-hero h1 {
  color: var(--white);
  font-size: 2.5rem;
  max-width: 80%;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1rem;
}

.page-hero p {
  color: var(--gray-300);
  font-size: 1.125rem;
  max-width: 80%;
  margin-left: auto;
  margin-right: auto;
}

.page-hero .label {
  color: var(--accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.875rem 1.75rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  text-decoration: none;
}

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

.btn--primary {
  background: var(--accent);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: var(--white);
}

.btn--outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}

.btn--outline:hover {
  border-color: var(--white);
  color: var(--white);
}

.btn--dark {
  background: var(--gray-900);
  color: var(--white);
}

.btn--dark:hover {
  background: var(--gray-800);
  color: var(--white);
}

.btn--lg {
  font-size: 1.125rem;
  padding: 1rem 2rem;
}

/* --- Grid --- */
.grid {
  display: grid;
  gap: 2rem;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* --- Cards --- */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 2rem;
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p {
  font-size: 0.9375rem;
}

.card--dark {
  background: var(--blue-mid);
  border-color: rgba(255,255,255,0.08);
}

.card--dark h3 {
  color: var(--white);
}

.card--dark p {
  color: var(--gray-400);
}

.card--link {
  text-decoration: none;
  display: block;
  color: inherit;
}

.card--link:hover {
  color: inherit;
}

.card--link h3 {
  transition: color 0.2s;
}

.card--link:hover h3 {
  color: var(--accent);
}

/* --- Stat blocks --- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.stat {
  text-align: center;
}

.stat__number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat__label {
  font-size: 0.875rem;
  color: var(--gray-500);
  font-weight: 500;
}

/* --- Image placeholders --- */
.img-placeholder {
  background: var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 10;
}

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

.img-placeholder--tall {
  aspect-ratio: 3 / 4;
}

.img-placeholder--square {
  aspect-ratio: 1 / 1;
}

.img-caption {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 0.5rem;
  font-style: italic;
}

/* --- Gallery --- */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.gallery__item {
  border-radius: 8px;
  overflow: hidden;
  background: var(--gray-200);
  aspect-ratio: 4 / 3;
}

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

/* --- Two-col content --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.two-col--reverse {
  direction: rtl;
}

.two-col--reverse > * {
  direction: ltr;
}

/* --- Lists --- */
.check-list {
  list-style: none;
  padding: 0;
}

.check-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  color: var(--gray-700);
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.x-list li::before {
  content: '✕';
  color: var(--gray-400);
}

/* --- Fit / Not Fit --- */
.fit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.fit-box {
  padding: 2rem;
  border-radius: 12px;
}

.fit-box--good {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
}

.fit-box--bad {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
}

.fit-box h3 {
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.fit-box--good h3 {
  color: #166534;
}

.fit-box--bad h3 {
  color: var(--gray-600);
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--accent);
  color: var(--white);
  padding: 4rem 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--white);
  margin-bottom: 0.75rem;
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.125rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn--primary {
  background: var(--white);
  color: var(--accent);
}

.cta-banner .btn--primary:hover {
  background: var(--gray-100);
  color: var(--accent-hover);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta-buttons--center {
  justify-content: center;
}

/* --- Fast Results Banner --- */
.fast-results {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(196,90,44,0.15);
  border: 2px solid var(--accent);
  border-radius: 10px;
  padding: 0.75rem 1.5rem;
  margin-bottom: 2rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
}

.fast-results a {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  white-space: nowrap;
}

.fast-results a:hover {
  color: var(--white);
}

/* --- Shop Notice --- */
.shop-notice {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-top: 1.5rem;
}

.shop-notice--dark {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  color: var(--gray-400);
}

/* --- Process Steps --- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  counter-reset: step;
}

.process__step {
  position: relative;
  counter-increment: step;
}

.process__step::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 1rem;
  line-height: 1;
}

.process__step h4 {
  margin-bottom: 0.5rem;
}

.process__step p {
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* --- Footer --- */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 4rem 0 2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__brand {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer__brand span {
  color: var(--accent);
}

.footer p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
}

.footer h4 {
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer__links {
  list-style: none;
  padding: 0;
}

.footer__links li {
  margin-bottom: 0.5rem;
}

.footer__links a {
  color: var(--gray-500);
  font-size: 0.875rem;
  transition: color 0.2s;
}

.footer__links a:hover {
  color: var(--white);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--gray-600);
}

/* --- Contact Form --- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.375rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  background: var(--white);
  color: var(--gray-800);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(196,90,44,0.1);
}

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

.form-success {
  text-align: center;
  padding: 2rem 0;
}

.form-success h3 {
  color: #166534;
  margin-bottom: 0.5rem;
}

.form-success p {
  color: var(--gray-600);
}

.form-error {
  color: #dc2626;
  font-size: 0.875rem;
  font-weight: 500;
  margin-top: 0.75rem;
  text-align: center;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

/* --- Contact Info --- */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-info__item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  background: var(--accent-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.contact-info__icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.contact-info__text h4 {
  font-size: 0.9375rem;
  margin-bottom: 0.125rem;
}

.contact-info__text p {
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* --- Internal links section --- */
.related-services {
  padding: 3rem 0;
  border-top: 1px solid var(--gray-200);
}

.related-services h3 {
  margin-bottom: 1.5rem;
}

.service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: all 0.2s;
}

.service-link:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Breadcrumb --- */
.breadcrumb {
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

.breadcrumb a {
  color: var(--gray-400);
}

.breadcrumb a:hover {
  color: var(--white);
}

.breadcrumb span {
  margin: 0 0.375rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .hero { padding: 4rem 0 3rem; }
  .hero h1 { font-size: 2.25rem; }
  .section { padding: 3rem 0; }

  .fast-results {
    font-size: 1rem;
    padding: 0.625rem 1rem;
    gap: 0.5rem;
  }

  .fast-results a {
    font-size: 1.125rem;
  }

  .nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    flex-direction: column;
    padding: 1.5rem;
    gap: 0.25rem;
    overflow-y: auto;
    z-index: 999;
    border-top: 1px solid var(--gray-200);
  }

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

  .nav a {
    font-size: 1rem;
    padding: 0.75rem 1rem;
    width: 100%;
  }

  .nav-toggle {
    display: block;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .two-col {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .two-col--reverse {
    direction: ltr;
  }

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

  .process {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

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

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-buttons .btn {
    justify-content: center;
  }

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

  .page-hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .stats { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .stat__number { font-size: 2rem; }
  .gallery { grid-template-columns: 1fr; }
}