/* Basic reset and shared variables */
:root {
  --color-primary: #1f2937;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-bg: #ffffff;
  --color-surface: #f3f4f6;
  --color-border: #e5e7eb;
  --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.08);
  --radius: 18px;
  --container-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
}

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

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

button,
input,
textarea {
  font: inherit;
}

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

.section {
  padding: 5rem 0;
}

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

.section-label {
  margin: 0 0 0.75rem;
  color: var(--color-accent-dark);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

.section-heading {
  max-width: 650px;
  margin-bottom: 2rem;
}

.section h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.2;
}

.section-text {
  margin: 0;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.card-grid {
  display: grid;
  gap: 1.5rem;
}

.card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover,
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 35px rgba(15, 23, 42, 0.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  transition: background-color 0.25s ease, color 0.25s ease,
    transform 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--color-accent);
  color: #111827;
}

.btn-primary:hover {
  background-color: #f2a21f;
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.22);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-primary);
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.18);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
}

.logo {
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: #f9fafb;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.menu-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0.25rem;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  margin: 5px 0;
  background-color: #ffffff;
  border-radius: 999px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  background-image: url("https://picsum.photos/seed/dsr-hero/1600/1000");
  background-size: cover;
  background-position: center;
  color: #ffffff;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(17, 24, 39, 0.86),
    rgba(31, 41, 55, 0.7)
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
  padding: 5rem 0;
}

.eyebrow {
  margin: 0 0 1rem;
  color: #fde68a;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 4.8rem);
  line-height: 1.1;
}

.hero-text {
  max-width: 650px;
  margin: 1.25rem 0 0;
  font-size: 1.12rem;
  color: rgba(255, 255, 255, 0.9);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

/* About */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* Services */
.services-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.service-card {
  padding: 1.75rem;
}

.service-icon {
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background-color: rgba(245, 158, 11, 0.14);
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

.service-card h3,
.choose-card h3,
.project-content h3 {
  margin: 0 0 0.65rem;
  font-size: 1.2rem;
}

.service-card p,
.choose-card p {
  margin: 0;
  color: var(--color-muted);
}

/* Projects */
.projects-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-card {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  background-color: #ffffff;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.project-content {
  padding: 1.25rem 1.35rem 1.5rem;
}

/* Why choose us */
.choose-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.choose-card {
  padding: 1.5rem;
}

/* Contact */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.contact-form {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 1.75rem;
}

.contact-form label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  margin-bottom: 1rem;
  background-color: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.18);
}

.form-message {
  min-height: 1.5rem;
  margin: 0.5rem 0 0;
  color: #047857;
  font-weight: 600;
}

.contact-details {
  margin-top: 1.5rem;
  color: var(--color-muted);
}

.contact-details p {
  margin: 0 0 0.85rem;
}

.contact-details a {
  color: var(--color-primary);
}

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: #ffffff;
  text-align: center;
  padding: 1.5rem 0;
}

.site-footer p {
  margin: 0;
}

/* Responsive styles */
@media (max-width: 992px) {
  .services-grid,
  .choose-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .two-column,
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 4rem 0;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    padding: 0 1rem 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: none;
  }

  .site-nav.open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    padding-top: 1rem;
  }

  .hero {
    min-height: 78vh;
  }

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

@media (max-width: 576px) {
  .container {
    width: min(100% - 1.25rem, var(--container-width));
  }

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

  .btn {
    width: 100%;
  }
}