/* Steel Root Engineering – Main Styles */

:root {
  --primary-color: #264653;
  --secondary-color: #2a9d8f;
  --light-gray: #f5f5f5;
  --dark-gray: #555;
  --white: #ffffff;
  --max-width: 1200px;
  --transition: 0.3s ease-in-out;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Roboto', sans-serif;
}

body {
  color: var(--dark-gray);
  line-height: 1.6;
  background: linear-gradient(180deg, #f7fafe 0%, #ffffff 100%);
}

body.home-page {
  background: linear-gradient(rgba(255,255,255,0.9), rgba(255,255,255,0.9)), url('https://images.unsplash.com/photo-1521791136064-7986c2920216?auto=format&fit=crop&w=1920&q=80') center/cover fixed;
}

body.about-page {
  background: linear-gradient(rgba(255,255,255,0.9), rgba(255,255,255,0.9)), url('https://images.unsplash.com/photo-1503389157997-9a2e83b3218b?auto=format&fit=crop&w=1920&q=80') center/cover fixed;
}

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

.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

.flex {
  display: flex;
}

.between {
  justify-content: space-between;
}

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

.gap-2 {
  gap: 1rem;
}

.grid {
  display: grid;
  gap: 2rem;
}

.two-cols {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

.section-padding {
  padding: 4rem 0;
}

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

h1,
h2,
h3,
h4 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-weight: 700;
}

p {
  margin-bottom: 1rem;
  font-weight: 300;
}

/* Header */
.site-header {
  padding: 1rem 0;
  background: var(--white);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 999;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--primary-color);
}

.logo-img {
  height: 40px;
  display: block;
}

.site-nav ul {
  list-style: none;
}

.site-nav a {
  text-decoration: none;
  color: var(--dark-gray);
  padding: 0.5rem 0.75rem;
  transition: color var(--transition);
}

.site-nav a:hover {
  color: var(--secondary-color);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  width: 25px;
  height: 2px;
  background: var(--primary-color);
  display: block;
  position: relative;
  transition: var(--transition);
}
.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}
.hamburger::before {
  top: -7px;
}
.hamburger::after {
  top: 7px;
}

/* Hero */
.hero {
  height: 70vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  color: var(--white);
  position: relative;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}
.hero-content {
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.hero p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
}

.hero-content h1 {
  color: #ffffff;
}

.hero-content h1,
.hero-content p {
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.7);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-link {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 500;
  border-radius: 4px;
  transition: background var(--transition), color var(--transition);
}
.btn-primary {
  background: var(--secondary-color);
  color: var(--white);
}
.btn-primary:hover {
  background: #23867b;
}
.btn-secondary {
  background: var(--primary-color);
  color: var(--white);
}
.btn-secondary:hover {
  background: #1c3340;
}
.btn-link {
  color: var(--secondary-color);
}
.btn-link:hover {
  color: #1c786d;
}

/* Service cards */
.service-card {
  background: var(--white);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
}
.service-card img {
  height: 180px;
  object-fit: cover;
}
.service-card h3 {
  padding: 1rem;
}
.service-card p {
  padding: 0 1rem 1rem;
  font-size: 0.9rem;
}

/* CTA Banner */
.cta-banner {
  background-size: cover;
  background-position: center;
  padding: 5rem 0;
  color: var(--white);
  position: relative;
}
.cta-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}
.cta-banner > .container {
  position: relative;
  z-index: 1;
}
.cta-banner h2 {
  color: #ffffff;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}

/* Footer */
.site-footer {
  background: var(--primary-color);
  color: var(--white);
  padding: 2.5rem 0 1rem;
}
.footer-links ul {
  list-style: none;
  line-height: 2;
}
.footer-links a {
  color: var(--white);
  text-decoration: none;
}
.footer-links a:hover {
  color: var(--secondary-color);
}
.copyright {
  margin-top: 1.5rem;
  font-size: 0.85rem;
}

/* Media Queries */
@media (max-width: 768px) {
  .site-nav {
    position: absolute;
    top: 64px;
    right: 0;
    background: var(--white);
    width: 200px;
    transform: translateX(100%);
    transition: transform var(--transition);
    box-shadow: -2px 4px 6px rgba(0, 0, 0, 0.05);
  }
  .site-nav.open {
    transform: translateX(0);
  }
  .site-nav ul {
    flex-direction: column;
    padding: 1rem;
  }
  .nav-toggle {
    display: block;
  }
}

/* Helper classes */
.mt-2 {
  margin-top: 2rem;
}

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

/* Project cards */
.project-card {
  background: var(--white);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition);
  text-align: center;
}
.project-card:hover {
  transform: translateY(-4px);
}
.project-card img {
  height: 260px;
  object-fit: cover;
  width: 100%;
}
.project-card h3 {
  padding: 1rem;
}
.project-card p {
  padding: 0 1rem 1.5rem;
  font-size: 0.9rem;
}

.nav-toggle.open .hamburger {
  background: transparent;
}
.nav-toggle.open .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.open .hamburger::after {
  transform: rotate(-45deg) translate(5px, -5px);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
}

.page-banner h1 {
  color: #ffffff;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.7);
}