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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #1a1a2e;
  --color-text-light: #555;
  --color-accent: #2d6a4f;
  --color-accent-hover: #1b4332;
  --color-border: #e0e0e0;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ===== Section Header ===== */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-line {
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin: 0 auto;
  border-radius: 2px;
}

/* ===== Button ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.2s, transform 0.2s;
  font-family: var(--font-family);
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow 0.3s;
}

.navbar.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

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

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color 0.2s;
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

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

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

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

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 220px 0 160px;
  text-align: center;
  background: url('west-texas-landscape-bw.jpg') center center / cover no-repeat;
  color: #fff;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 46, 0.6);
}

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

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: #fff;
}

.hero-tagline {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

/* ===== About ===== */
.about {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 60px;
  align-items: start;
  max-width: 720px;
  margin: 0 auto;
}

.about-text p {
  color: var(--color-text-light);
  margin-bottom: 20px;
  font-size: 1.05rem;
  text-align: center;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 40px;
  background: var(--color-bg);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Services ===== */
.services {
  padding: 100px 0;
  background: var(--color-bg);
}

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

.service-card {
  padding: 40px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(45, 106, 79, 0.08);
}

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45, 106, 79, 0.08);
  border-radius: 12px;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-bottom: 32px;
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

/* Form */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
}

.form-success {
  display: none;
  margin-top: 16px;
  color: var(--color-accent);
  font-weight: 500;
}

.form-success.visible {
  display: block;
}

/* ===== Footer ===== */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.back-to-top {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-light);
  transition: color 0.2s, border-color 0.2s;
}

.back-to-top:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links li {
    width: 100%;
    text-align: center;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
  }

  .hero {
    padding: 160px 0 100px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-tagline {
    font-size: 1.05rem;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .section-header {
    margin-bottom: 40px;
  }

  .about,
  .services,
  .contact {
    padding: 72px 0;
  }
}