/* ===================================
   P&A Environmental - Stylesheet
   =================================== */

/* CSS Variables */
:root {
  --color-dark: #1a1a1a;
  --color-darker: #111111;
  --color-white: #ffffff;
  --color-gray-light: #f5f5f5;
  --color-gray: #666666;
  --color-gray-dark: #333333;
  --color-accent: #e67e22;
  --color-accent-hover: #d35400;
  --color-blue: #1a7efb;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 80px;

  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);

  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-dark);
  background-color: var(--color-white);
}

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

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-dark);
}

h1 {
  font-size: 48px;
}

h2 {
  font-size: 36px;
  margin-bottom: 24px;
}

h3 {
  font-size: 24px;
  margin-bottom: 16px;
}

p {
  margin-bottom: 16px;
}

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

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  border: 2px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

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

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

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

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

.btn-outline-dark {
  background-color: transparent;
  color: var(--color-dark);
  border-color: var(--color-dark);
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-white);
  z-index: 1000;
  transition: var(--transition);
  box-shadow: 0 1px 0 rgba(0,0,0,0.1);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

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

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

.logo img {
  height: 50px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--color-dark);
  font-weight: 500;
  padding: 8px 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: var(--transition);
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
}

.nav .btn {
  padding: 10px 24px;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background-color: var(--color-dark);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-color: var(--color-dark);
  background-size: cover;
  background-position: center;
  margin-top: var(--header-height);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,26,0.9) 0%, rgba(26,26,26,0.7) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: 24px;
}

.hero p {
  color: rgba(255,255,255,0.9);
  font-size: 20px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.trust-badges {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  font-weight: 500;
}

.trust-badge svg {
  width: 20px;
  height: 20px;
  fill: var(--color-accent);
}

/* Page Hero (smaller for inner pages) */
.page-hero {
  min-height: 350px;
}

.page-hero h1 {
  margin-bottom: 16px;
}

/* Sections */
.section {
  padding: 80px 0;
}

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

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
}

.section-header p {
  color: var(--color-gray);
  font-size: 18px;
}

/* Service Cards */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--color-white);
  padding: 40px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
}

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

.service-card .icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: var(--color-gray-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-card .icon svg {
  width: 40px;
  height: 40px;
  stroke: var(--color-accent);
  fill: none;
  stroke-width: 2;
}

.service-card h3 {
  margin-bottom: 16px;
}

.service-card p {
  color: var(--color-gray);
  margin-bottom: 24px;
}

.service-card .btn {
  padding: 10px 24px;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

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

.feature-item .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item .icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--color-white);
  fill: none;
  stroke-width: 2;
}

.feature-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.feature-item p {
  color: var(--color-gray);
  font-size: 14px;
}

/* CTA Banner */
.cta-banner {
  padding: 60px 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: 24px;
}

.cta-banner p {
  color: rgba(255,255,255,0.9);
  font-size: 18px;
  margin-bottom: 32px;
}

/* Survey Types Cards */
.survey-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.survey-card {
  background: var(--color-white);
  padding: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--color-accent);
}

.survey-card h3 {
  margin-bottom: 16px;
}

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

/* Process Steps */
.process-steps {
  max-width: 800px;
  margin: 0 auto;
}

.process-step {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}

.process-step:last-child {
  margin-bottom: 0;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 20px;
}

.step-content h3 {
  margin-bottom: 8px;
}

.step-content p {
  color: var(--color-gray);
  margin-bottom: 0;
}

/* Materials Grid */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.material-item {
  background: var(--color-gray-light);
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
  transition: var(--transition);
}

.material-item:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* Info Box */
.info-box {
  background: var(--color-gray-light);
  border-left: 4px solid var(--color-accent);
  padding: 24px 32px;
  border-radius: 0 8px 8px 0;
}

.info-box h3 {
  margin-bottom: 12px;
}

.info-box p {
  margin-bottom: 0;
  color: var(--color-gray);
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

/* Form Styles */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--color-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  font-family: inherit;
  border: 1px solid #ddd;
  border-radius: 4px;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-form .btn {
  width: 100%;
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-item {
  display: flex;
  gap: 16px;
}

.contact-item .icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item .icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-white);
  fill: none;
  stroke-width: 2;
}

.contact-item h4 {
  font-size: 16px;
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--color-gray);
  margin-bottom: 0;
}

.contact-item a {
  color: var(--color-gray-dark);
}

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

/* Office Cards */
.offices {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 32px;
}

.office-card {
  background: var(--color-gray-light);
  padding: 24px;
  border-radius: 8px;
}

.office-card h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.office-card p {
  margin-bottom: 0;
  color: var(--color-gray);
}

/* Form Messages */
.form-message {
  padding: 16px;
  border-radius: 4px;
  margin-bottom: 24px;
  display: none;
}

.form-message.success {
  display: block;
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-message.error {
  display: block;
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* Footer */
.footer {
  background-color: var(--color-darker);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer h4 {
  color: var(--color-white);
  font-size: 18px;
  margin-bottom: 24px;
}

.footer-about p {
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  color: rgba(255,255,255,0.7);
  margin-bottom: 12px;
}

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

.footer-contact p {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 16px;
}

.footer-contact svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  stroke: var(--color-accent);
  fill: none;
  stroke-width: 2;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  margin-bottom: 0;
  font-size: 14px;
}

.footer-bottom a {
  color: rgba(255,255,255,0.7);
}

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

/* Mobile Responsive */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .survey-cards {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 768px) {
  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 28px;
  }

  .section {
    padding: 48px 0;
  }

  /* Mobile Navigation */
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    transform: translateX(100%);
    transition: var(--transition);
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 20px;
  }

  .nav .btn {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  /* Hero */
  .hero {
    min-height: 500px;
  }

  .hero p {
    font-size: 18px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
    text-align: center;
  }

  .trust-badges {
    flex-direction: column;
    gap: 16px;
  }

  /* Grids */
  .services-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 4px;
  z-index: 9999;
}

.skip-link:focus {
  top: 8px;
}