/* ============================================
   GPI Trailers — Global Styles
   Theme: Factory Trailers Direct
   Palette: Gray + Red
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-primary: #C41E3A;
  --color-primary-dark: #A0182F;
  --color-primary-light: #E82242;
  --color-secondary: #2D2D2D;
  --color-black: #000000;
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6B;
  --color-border: #E0E0E0;
  --color-watermark: #E8E8E8;
  --color-card-bg: #FFFFFF;
  --color-overlay: rgba(0, 0, 0, 0.6);

  /* Typography */
  --font-heading: 'Barlow Condensed', sans-serif;
  --font-body: 'Manrope', 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;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 1280px;
  --header-height: 80px;

  /* Effects */
  --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);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* --- Reset --- */
*,
*::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: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -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;
}

/* --- Typography --- */
.heading-xl {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 0.9;
  letter-spacing: -0.02em;
}

.heading-lg {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 0.95;
  letter-spacing: -0.01em;
}

.heading-md {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  text-transform: uppercase;
  line-height: 1;
}

.heading-sm {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 600;
  text-transform: uppercase;
  line-height: 1.1;
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.7;
}

.body-md {
  font-size: 1rem;
  line-height: 1.6;
}

.body-sm {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-uppercase {
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.text-muted {
  color: var(--color-text-muted);
}

/* --- Container --- */
.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.625rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background: var(--color-text);
  color: var(--color-white);
}

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

.btn-black:hover {
  background: var(--color-secondary);
}

.btn-lg {
  min-height: 3.5rem;
  padding: 0.75rem 2rem;
  font-size: 1.125rem;
}

/* --- Watermark Text --- */
.watermark {
  font-family: var(--font-heading);
  font-size: clamp(8rem, 20vw, 16rem);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-watermark);
  line-height: 0.8;
  pointer-events: none;
  user-select: none;
  position: absolute;
  z-index: 0;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-black);
  color: var(--color-white);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-white);
  border-radius: var(--radius-sm);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.logo-text small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.6);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.header-nav a {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.2s ease;
  position: relative;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-white);
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.2s ease;
}

.header-nav a:hover::after,
.header-nav a.active::after {
  width: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-phone {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-white);
  white-space: nowrap;
}

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

.header-dealer-btn {
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
  white-space: nowrap;
}

.header-dealer-btn:hover {
  background: var(--color-primary-dark);
}

.header-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.header-search:hover {
  border-color: rgba(255, 255, 255, 0.5);
}

.header-search svg {
  width: 1.125rem;
  height: 1.125rem;
}

/* Hamburger (mobile) */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 1px;
  transition: all 0.3s ease;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-black);
  color: var(--color-white);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

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

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

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: var(--color-primary);
}

.footer-newsletter {
  margin-top: var(--space-lg);
}

.footer-newsletter p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-sm);
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

.newsletter-form input {
  flex: 1;
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.newsletter-form button {
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.2s ease;
  white-space: nowrap;
}

.newsletter-form button:hover {
  background: var(--color-primary-dark);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: all 0.2s ease;
}

.footer-social a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-bottom-links a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  transition: color 0.2s ease;
}

.footer-bottom-links a:hover {
  color: var(--color-primary);
}

/* --- Section Spacing --- */
.section {
  padding: var(--space-3xl) 0;
}

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

/* --- Modal / Lightbox --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.7);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: 2001;
  width: min(calc(100% - 2rem), 520px);
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.modal-close:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.modal-close svg {
  width: 1rem;
  height: 1rem;
}

.modal-body {
  margin-bottom: var(--space-lg);
}

.modal-form {
  display: grid;
  gap: var(--space-md);
}

.modal-form label {
  display: grid;
  gap: 0.375rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.modal-form input,
.modal-form textarea {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
}

.modal-form textarea {
  min-height: 6rem;
  resize: vertical;
}

.modal-form input:focus,
.modal-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
}

.modal-footer .btn {
  min-height: 2.75rem;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .header-nav {
    display: none;
  }

  .header-nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-black);
    padding: var(--space-lg);
    gap: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hamburger {
    display: flex;
  }

  .header-dealer-btn {
    display: none;
  }

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

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

  .header-search {
    display: none;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  :root {
    --header-height: 64px;
  }

  .logo-mark {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 1rem;
  }

  .logo-text {
    font-size: 1rem;
  }
}