/* =============================================
   Colored Metal Products - Main Stylesheet
   ============================================= */

/* CSS Custom Properties (Variables)
   ============================================= */
:root {
  /* Colors */
  --color-primary: #1a2744;
  --color-secondary: #4a5568;
  --color-accent: #eab308;
  --color-background: #fafaf9;
  --color-surface: #f1f5f9;
  --color-text-dark: #1a2744;
  --color-text-body: #4a5568;
  --color-white: #ffffff;
  --color-placeholder: #e5e7eb;

  /* Typography */
  --font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-base: 16px;
  --font-weight-normal: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-body: 1.6;
  --line-height-heading: 1.2;

  /* Spacing (8px base unit) */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-8: 64px;
  --space-10: 80px;
  --space-12: 96px;
  --space-15: 120px;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-body);
  color: var(--color-text-body);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Skip Link (Accessibility)
   ============================================= */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Typography
   ============================================= */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  color: var(--color-text-dark);
}

h1 {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: 2rem;
  font-weight: var(--font-weight-semibold);
}

h3 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
}

h4 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--space-2);
}

p:last-child {
  margin-bottom: 0;
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }
}

/* Container
   ============================================= */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-4);
  }
}

/* Header
   ============================================= */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-surface);
  height: var(--header-height);
}

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

.header__logo {
  display: flex;
  align-items: center;
}

.header__logo:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.header__logo-img {
  width: auto;
  height: 32px;
  max-width: none;
}

@media (min-width: 480px) {
  .header__logo-img {
    height: 36px;
  }
}

@media (min-width: 640px) {
  .header__logo-img {
    height: 40px;
  }
}

@media (min-width: 768px) {
  .header__logo-img {
    height: 44px;
  }
}

@media (min-width: 1024px) {
  .header__logo-img {
    height: 48px;
  }
}

/* Navigation
   ============================================= */
.nav {
  display: none;
}

.nav--open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-surface);
  padding: var(--space-3);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav__link {
  display: block;
  padding: var(--space-2);
  color: var(--color-text-body);
  font-weight: var(--font-weight-normal);
  transition: color var(--transition-fast);
  border-radius: var(--radius-sm);
}

.nav__link:hover,
.nav__link:focus {
  color: var(--color-primary);
}

.nav__link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav__link--active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .nav__list {
    flex-direction: row;
    gap: var(--space-4);
  }

  .nav__link {
    padding: var(--space-1) 0;
  }
}

/* Mobile Menu Toggle
   ============================================= */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.nav-toggle:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle--open .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle--open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle--open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

/* Hero Section
   ============================================= */
.hero {
  background-color: var(--color-primary);
  padding: var(--space-10) 0;
}

.hero--light {
  background-color: var(--color-surface);
}

.hero__content {
  max-width: 800px;
}

.hero__title {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.hero--light .hero__title {
  color: var(--color-text-dark);
}

.hero__subtitle {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.125rem;
  margin-bottom: var(--space-5);
}

.hero--light .hero__subtitle {
  color: var(--color-text-body);
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-12) 0;
  }

  .hero__subtitle {
    font-size: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: var(--space-15) 0;
  }
}

/* Section Styles
   ============================================= */
.section {
  padding: var(--space-10) 0;
}

.section--surface {
  background-color: var(--color-surface);
}

.section--dark {
  background-color: var(--color-primary);
}

.section__header {
  margin-bottom: var(--space-5);
}

.section__title {
  margin-bottom: var(--space-2);
}

.section--dark .section__title {
  color: var(--color-white);
}

.section__intro {
  font-size: 1.125rem;
  max-width: 720px;
}

.section--dark .section__intro,
.section--dark p {
  color: rgba(255, 255, 255, 0.85);
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-12) 0;
  }

  .section__header {
    margin-bottom: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .section {
    padding: var(--space-15) 0;
  }
}

/* Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

.btn--primary:hover {
  background-color: #d4a107;
}

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

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

.btn--link {
  padding: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

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

/* Cards
   ============================================= */
.card-grid {
  display: grid;
  gap: var(--space-4);
}

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

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

.card-grid--4 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 768px) {
  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background-color: var(--color-white);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-surface);
}

.card--surface {
  background-color: var(--color-surface);
  border: none;
}

.card__label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.card__title {
  margin-bottom: var(--space-2);
}

.card__text {
  color: var(--color-text-body);
  margin-bottom: var(--space-3);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  transition: color var(--transition-fast);
}

.card__link:hover,
.card__link:focus {
  color: var(--color-accent);
}

.card__link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Card Logos (Homepage)
   ============================================= */
.card__logo-link {
  display: block;
  margin-bottom: var(--space-3);
}

.card__logo {
  max-width: 140px;
  max-height: 50px;
  width: auto;
  height: auto;
  object-fit: contain;
}

@media (min-width: 768px) {
  .card__logo {
    max-width: 160px;
    max-height: 55px;
  }
}

/* Division Cards (Large Format)
   ============================================= */
.division-card {
  background-color: var(--color-white);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-surface);
  margin-bottom: var(--space-4);
}

.division-card:last-child {
  margin-bottom: 0;
}

.division-card__name {
  font-size: 1.75rem;
  margin-bottom: var(--space-1);
}

.division-card__tagline {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}

.division-card__description {
  margin-bottom: var(--space-3);
}

.division-card__projects {
  font-size: 0.9375rem;
  color: var(--color-secondary);
  margin-bottom: var(--space-4);
}

.division-card__projects strong {
  color: var(--color-text-dark);
}

.division-card__logo-link {
  display: block;
  margin-bottom: var(--space-3);
}

.division-card__logo {
  max-width: 180px;
  max-height: 60px;
  width: auto;
  height: auto;
  object-fit: contain;
}

@media (min-width: 768px) {
  .division-card {
    padding: var(--space-6);
  }

  .division-card__name {
    font-size: 2rem;
  }

  .division-card__logo {
    max-width: 200px;
    max-height: 70px;
  }
}

/* Credibility Strip
   ============================================= */
.credibility-strip {
  background-color: var(--color-surface);
  padding: var(--space-5) 0;
  text-align: center;
}

.credibility-strip__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
}

@media (min-width: 768px) {
  .credibility-strip__content {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-1);
  }

  .credibility-strip__item::after {
    content: '•';
    margin-left: var(--space-2);
    color: var(--color-secondary);
  }

  .credibility-strip__item:last-child::after {
    content: '';
  }
}

/* CTA Section
   ============================================= */
.cta-section {
  background-color: var(--color-primary);
  padding: var(--space-10) 0;
  text-align: center;
}

.cta-section__title {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.cta-section__text {
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto var(--space-5);
  font-size: 1.125rem;
}

@media (min-width: 768px) {
  .cta-section {
    padding: var(--space-12) 0;
  }
}

/* Content Sections
   ============================================= */
.content-section {
  margin-bottom: var(--space-8);
}

.content-section:last-child {
  margin-bottom: 0;
}

.content-section__title {
  margin-bottom: var(--space-3);
}

.content-section p + p {
  margin-top: var(--space-3);
}

/* Two Column Layout
   ============================================= */
.two-col {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .two-col {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

.two-col__title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  margin-bottom: var(--space-2);
}

/* Lists
   ============================================= */
.styled-list {
  list-style: none;
}

.styled-list li {
  position: relative;
  padding-left: var(--space-3);
  margin-bottom: var(--space-2);
}

.styled-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-secondary);
}

.styled-list li:last-child {
  margin-bottom: 0;
}

/* Equipment Grid
   ============================================= */
.equipment-grid {
  display: grid;
  gap: var(--space-3);
}

@media (min-width: 640px) {
  .equipment-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.equipment-item {
  padding: var(--space-3);
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-dark);
}

/* Service Blocks
   ============================================= */
.service-blocks {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .service-blocks {
    grid-template-columns: repeat(2, 1fr);
  }
}

.service-block {
  padding: var(--space-4);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-surface);
}

.service-block__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

/* Facility Summary
   ============================================= */
.facility-summary {
  background-color: var(--color-surface);
  padding: var(--space-8) 0;
  text-align: center;
}

.facility-summary__content {
  font-size: 1.125rem;
  line-height: 1.8;
}

/* Contact Page
   ============================================= */
.contact-layout {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-8);
  }
}

.contact-info {
  font-size: 1.125rem;
  line-height: 1.8;
}

.contact-info__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

.contact-info__address {
  margin-bottom: var(--space-3);
}

.contact-info__phone {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Forms
   ============================================= */
.form {
  background-color: var(--color-white);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-surface);
}

.form__group {
  margin-bottom: var(--space-3);
}

.form__label {
  display: block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  margin-bottom: var(--space-1);
}

.form__label--required::after {
  content: ' *';
  color: #dc2626;
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: var(--space-2);
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--color-secondary);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 39, 68, 0.1);
}

.form__textarea {
  min-height: 150px;
  resize: vertical;
}

.form__note {
  font-size: 0.875rem;
  color: var(--color-secondary);
  margin-top: var(--space-3);
}

.form__submit {
  width: 100%;
}

@media (min-width: 640px) {
  .form__submit {
    width: auto;
  }
}

/* Division Contact Note
   ============================================= */
.division-contact-note {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.division-contact-note a {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  text-decoration: underline;
}

.division-contact-note a:hover {
  color: var(--color-accent);
}

/* Map Section
   ============================================= */
.map-section {
  margin-top: var(--space-6);
}

.map-container {
  width: 100%;
  height: 300px;
  background-color: var(--color-placeholder);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

@media (min-width: 768px) {
  .map-container {
    height: 400px;
  }
}

/* Footer
   ============================================= */
.footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-8) 0 var(--space-5);
}

.footer__content {
  display: grid;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .footer__content {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-6);
  }
}

.footer__company-name {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.footer__address {
  margin-bottom: var(--space-2);
}

.footer__phone {
  color: var(--color-white);
}

.footer__phone:hover {
  color: var(--color-accent);
}

.footer__section-title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__link {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-fast);
}

.footer__link:hover,
.footer__link:focus {
  color: var(--color-accent);
}

.footer__link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.footer__bottom {
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__copyright {
  font-size: 0.875rem;
  margin-bottom: var(--space-1);
}

.footer__tagline {
  font-size: 0.875rem;
  font-style: italic;
}

/* 404 Page
   ============================================= */
.error-page {
  text-align: center;
  padding: var(--space-12) 0;
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.error-page__title {
  font-size: 3rem;
  margin-bottom: var(--space-3);
}

.error-page__text {
  font-size: 1.125rem;
  max-width: 500px;
  margin: 0 auto var(--space-5);
}

/* Image Placeholders
   ============================================= */
.placeholder-image {
  background-color: var(--color-placeholder);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-3);
}

/* Utility Classes
   ============================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mb-4 {
  margin-bottom: var(--space-4);
}