/* Basic reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Open Sans", sans-serif;
  background-color: #05070b;
  color: #f5f7fa;
  line-height: 1.6;
}

a {
  color: #19c3cc;
}

.hk-container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hk-section {
  padding: 4rem 0;
  background-color: #0b0f17;
}

.hk-section-alt {
  padding: 4rem 0;
  background-color: #101624;
}

.hk-two-cols {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
}

.hk-three-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.hk-header {
  position: sticky;
  top: 0;
  min-height: 70vh;

  background-image: url("/images/hamburg-industry.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}


  min-height: 70vh;
  background-image: url("images/hero-powerplant.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hk-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}

.hk-logo img {
  height: 56px;
}

.hk-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.nav-link {
  text-decoration: none;
  color: #d5dde8;
  padding: 0.3rem 0.5rem;
  border-radius: 999px;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.nav-link:hover {
  background-color: rgba(25, 195, 204, 0.15);
  color: #ffffff;
}

.hk-hero {
  position: relative;
  min-height: 68vh;
  display: flex;
  align-items: center;
  background-image: url("images/hero-powerplant.png");
  background-size: cover;
  background-position: center;
  color: #ffffff;
}

.hk-hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 0%, rgba(25, 195, 204, 0.35), transparent 55%),
              linear-gradient(to bottom right, rgba(5, 7, 11, 0.95), rgba(8, 12, 20, 0.9));
}

.hk-hero-content {
  position: relative;
  padding: 4.5rem 1.5rem;
}

.hk-hero h1 {
  font-size: clamp(2.1rem, 3vw, 2.7rem);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hk-hero-sub {
  max-width: 34rem;
  font-size: 1rem;
  color: #e2e7f0;
}

.hk-hero-buttons {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* Buttons */
.hk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.06s ease;
}

.hk-btn-primary {
  background-color: #19c3cc;
  border-color: #19c3cc;
  color: #05070b;
  font-weight: 600;
}

.hk-btn-ghost {
  background: transparent;
  border-color: rgba(229, 234, 244, 0.6);
  color: #e5eaf4;
}

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

.hk-btn-primary:hover {
  background-color: #12a2a9;
  border-color: #12a2a9;
}

.hk-btn-ghost:hover {
  background-color: rgba(229, 234, 244, 0.07);
}

/* Typography */
h2 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.15rem;
  margin: 1rem 0 0.4rem;
}

p {
  margin-bottom: 0.75rem;
  color: #d5dde8;
}

.hk-section-alt p {
  color: #d7e0ee;
}

/* Tiles */
.hk-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.hk-tile {
  background: radial-gradient(circle at top left, rgba(25, 195, 204, 0.16), rgba(10, 14, 24, 0.95));
  padding: 1.5rem;
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.hk-link {
  display: inline-flex;
  margin-top: 0.4rem;
  font-size: 0.9rem;
  color: #19c3cc;
  text-decoration: none;
}

.hk-link:hover {
  text-decoration: underline;
}

/* Image card */
.hk-image-card {
  flex: 1 1 320px;
}

.hk-image-card img {
  width: 100%;
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
  display: block;
}

.hk-image-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 14px;
}


/* Form */
.hk-form {
  background: #0b101b;
  padding: 1.75rem;
  border-radius: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.hk-form-row {
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.hk-form label {
  font-size: 0.9rem;
  color: #c0cadb;
}

.hk-form input,
.hk-form select,
.hk-form textarea {
  border-radius: 0.7rem;
  border: 1px solid rgba(177, 188, 210, 0.55);
  background: #05070b;
  color: #e5eaf4;
  padding: 0.5rem 0.75rem;
  font: inherit;
}

.hk-form input:focus,
.hk-form select:focus,
.hk-form textarea:focus {
  outline: none;
  border-color: #19c3cc;
  box-shadow: 0 0 0 1px rgba(25, 195, 204, 0.6);
}

.hk-form-checkbox {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.hk-form-checkbox input {
  width: auto;
}

.hk-form-note {
  margin-top: 0.7rem;
  font-size: 0.75rem;
  color: #8e9ab4;
}

/* Footer */
.hk-footer {
  background-color: #05070b;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.hk-footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.hk-footer-left p {
  font-size: 0.85rem;
  color: #9aa6c0;
}

.hk-footer-link {
  font-size: 0.85rem;
  color: #9aa6c0;
  text-decoration: none;
  margin-left: 0.9rem;
}

.hk-footer-link:hover {
  color: #cbd5e7;
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 960px) {
  .hk-header-inner {
    flex-wrap: wrap;
    gap: 0.6rem;
  }
  .hk-nav {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 720px) {
  .hk-hero {
    min-height: 70vh;
  }
  .hk-hero-content {
    padding: 3.25rem 1.5rem 3rem;
  }
  .hk-two-cols {
    flex-direction: column;
  }
}