/* ===================================================================
   Tongaat Scrap Metal — Main Stylesheet
   Palette from research/design-language.md:
     Primary:   graphite #2B2E33
     Accent:    safety-yellow #F2C230
     Secondary: oxide rust-orange #A2481F
     Neutrals:  off-white #F2F1EE, mid steel-grey #6B6E73
   =================================================================== */

/* --- CSS Custom Properties (Light theme — default) --- */
:root {
  /* Brand colours (constant in both themes) */
  --color-brand-graphite: #2B2E33;
  --color-brand-yellow: #F2C230;
  --color-brand-rust: #A2481F;
  --color-brand-mid-grey: #6B6E73;

  /* Page surface & text (swap in dark mode) */
  --color-page-bg: #F2F1EE;
  --color-surface: #FFFFFF;
  --color-surface-alt: #E8E7E4;
  --color-text-primary: #2B2E33;
  --color-text-secondary: #6B6E73;
  --color-border: #D4D3D0;

  /* Text on brand backgrounds (hero, footer, buttons, nav) — stays light in BOTH themes */
  --color-on-brand: #FFFFFF;
  --color-on-brand-alt: #F2F1EE;

  /* Accent/CTA colours */
  --color-accent: #F2C230;
  --color-accent-hover: #D4A820;
  --color-accent-text: #2B2E33; /* text ON the yellow accent */

  /* Header / Footer specific */
  --color-header-bg: #2B2E33;
  --color-header-text: #FFFFFF;
  --color-footer-bg: #2B2E33;
  --color-footer-text: #F2F1EE;

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

  /* Typography */
  --font-heading: 'Archivo Black', 'Oswald', sans-serif;
  --font-body: 'Inter', 'Roboto', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

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

  /* Max content width */
  --max-width: 1200px;
}

/* --- Dark theme overrides --- */
[data-theme="dark"] {
  --color-page-bg: #1A1C1F;
  --color-surface: #2B2E33;
  --color-surface-alt: #353840;
  --color-text-primary: #F2F1EE;
  --color-text-secondary: #A8AAAD;
  --color-border: #454850;

  /* Accent adjusts slightly for dark background contrast */
  --color-accent: #F2C230;
  --color-accent-hover: #FFCF42;
  --color-accent-text: #1A1C1F;

  /* Header/Footer stay dark (they're already dark-on-dark — keep them consistent) */
  --color-header-bg: #16181B;
  --color-footer-bg: #16181B;

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

/* --- 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(--color-text-primary);
  background-color: var(--color-page-bg);
  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-brand-yellow);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

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

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 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-md);
}

.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;
}

.section {
  padding: var(--space-2xl) 0;
}

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

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

/* --- Header --- */
.header {
  background-color: var(--color-header-bg);
  color: var(--color-header-text);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-on-brand);
}

.header__brand:hover,
.header__brand:focus {
  color: var(--color-accent);
  text-decoration: none;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

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

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

/* --- Navigation --- */
.nav__list {
  display: flex;
  list-style: none;
  gap: var(--space-md);
  padding: 0;
}

.nav__link {
  color: var(--color-on-brand);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color 0.2s, background-color 0.2s;
  text-decoration: none;
}

.nav__link:hover,
.nav__link:focus,
.nav__link--active {
  color: var(--color-accent);
  text-decoration: none;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-on-brand);
}

.nav-toggle svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* --- Theme Toggle --- */
.theme-toggle {
  background: none;
  border: 2px solid var(--color-on-brand);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-on-brand);
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0;
}

.theme-toggle:hover,
.theme-toggle:focus {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

.theme-toggle .icon-moon {
  display: none;
}

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

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

/* --- Hero Section --- */
.hero {
  background-color: var(--color-brand-graphite);
  color: var(--color-on-brand);
  padding: var(--space-2xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(43, 46, 51, 0.95), rgba(43, 46, 51, 0.8));
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero__title {
  color: var(--color-on-brand);
  margin-bottom: var(--space-md);
}

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

.hero__subtitle {
  font-size: 1.2rem;
  margin-bottom: var(--space-lg);
  color: var(--color-on-brand-alt);
  line-height: 1.6;
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.85rem 1.8rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.2s, background-color 0.2s;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

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

.btn--primary:hover,
.btn--primary:focus {
  background-color: var(--color-accent-hover);
  color: var(--color-accent-text);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-on-brand);
  border: 2px solid var(--color-on-brand);
}

.btn--secondary:hover,
.btn--secondary:focus {
  background-color: var(--color-on-brand);
  color: var(--color-brand-graphite);
}

.btn--whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
}

.btn--whatsapp:hover,
.btn--whatsapp:focus {
  background-color: #1FAD54;
  color: #FFFFFF;
}

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

.btn svg,
.btn img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* --- Cards --- */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.3s, border-color 0.3s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.card__title {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* --- Grid layouts --- */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* --- Section Headings --- */
.section__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

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

.section__header p {
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section__header::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--color-accent);
  margin: var(--space-md) auto 0;
  border-radius: 2px;
}

/* --- Metal Categories (What We Buy) --- */
.metal-category {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  transition: background-color 0.3s, border-color 0.3s;
}

.metal-category__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.metal-category__list {
  list-style: none;
  padding: 0;
}

.metal-category__list li {
  padding: var(--space-xs) 0;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.metal-category__list li::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

/* --- Info Banner (compliance/legitimacy) --- */
.info-banner {
  background-color: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  transition: background-color 0.3s, border-color 0.3s;
}

.info-banner__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  color: var(--color-accent);
}

.info-banner__text {
  font-size: 0.95rem;
  line-height: 1.6;
}

.info-banner__text strong {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}

/* --- Contact Section --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.contact-info__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-accent);
  margin-top: 2px;
}

.contact-info__label {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.contact-info__value {
  color: var(--color-text-primary);
  font-size: 1rem;
}

.contact-info__value a {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
}

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

/* --- Map --- */
.map-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.map-wrapper iframe {
  width: 100%;
  height: 350px;
  border: 0;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--space-xl) 0 var(--space-lg);
}

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

.footer__brand-text {
  font-size: 0.9rem;
  color: var(--color-on-brand-alt);
  margin-top: var(--space-sm);
  opacity: 0.85;
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

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

.footer__links li {
  margin-bottom: var(--space-sm);
}

.footer__links a {
  color: var(--color-on-brand-alt);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer__links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-on-brand-alt);
  opacity: 0.7;
}

/* --- Placeholder image blocks --- */
.placeholder-img {
  background-color: var(--color-surface-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: var(--space-lg);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  text-align: center;
  transition: background-color 0.3s, border-color 0.3s;
}

/* --- About page --- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about-values .grid {
  margin-top: var(--space-lg);
}

/* --- Enquiry form --- */
.form {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: background-color 0.3s, border-color 0.3s;
}

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

.form__label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-page-bg);
  color: var(--color-text-primary);
  transition: border-color 0.2s, background-color 0.3s;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(242, 194, 48, 0.2);
}

.form__textarea {
  min-height: 120px;
  resize: vertical;
}

.form__note {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav__list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-header-bg);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-xs);
    box-shadow: var(--shadow-md);
  }

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

  .nav__link {
    padding: var(--space-sm) var(--space-md);
  }

  .nav-toggle {
    display: flex;
  }

  .hero__content {
    text-align: center;
  }

  .hero__ctas {
    justify-content: center;
  }

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

  .about-intro {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .header__logo-text {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .hero__ctas {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }
}