/* Reset i podstawy */
* {
  box-sizing: border-box;
}

body, html {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  color: #000;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 18px;
  font-weight: 300;
}

/* Kolory */
:root {
  --main-blue: #3399ff;
  --menu-blue: #0077cc;
  --white-color: #fff;
  --background-gray: #f2f2f2;
  --footer-text: #f0f0f0;
}

/* HEADER z tłem graficznym */
header {
  background-image: url('https://www.st-tronic.pl/galeria/tlo-klima.png');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

/* Logo i menu transparentne */
header .container,
header .logo,
nav ul,
.menu-icon {
  background: transparent;
}

/* Logo */
header .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo img {
  height: 160px;
  display: block;
}

/* --- MENU --- */
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 30px;
}

nav a {
  text-decoration: none;
  color: #000;
  font-weight: bold;
  font-size: 1.3rem;
  display: inline-block;
}

nav a:hover,
nav a.active {
  text-decoration: underline;
  color: var(--menu-blue);
}

/* Hamburger (checkbox hack) */
.menu-toggle {
  display: none;
}

.menu-icon {
  display: none;
  cursor: pointer;
  font-size: 2rem;
  padding: 10px;
  color: #000;
}

/* --- RESPONSYWNOŚĆ - MENU MOBILE --- */
@media (max-width: 768px) {
  .menu-icon {
    display: block;
  }

  nav ul {
    flex-direction: column;
    gap: 10px;
    position: absolute;
    top: 100%;
    left: 10px;
    right: 10px;
    display: none;
    padding: 15px 0;
    text-align: center;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 999;
  }

  .menu-toggle:checked + .menu-icon + nav ul {
    display: flex;
  }

  nav a {
    line-height: normal;
    padding: 10px 0;
  }

  .logo img {
    height: 120px;
  }

  header .container {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* H1 nagłówek główny */
h1 {
  font-size: 3rem;  
  font-weight: bold;  
  line-height: 1.1;  
  margin: 20px 0;
  text-align: left;
  color: #000;
}

h1 span {
  font-size: 1rem;
  font-weight: normal;
  display: block;
  margin-top: -5px;
  color: #333;
  line-height: 1.2;
}

/* CONTENT */
main.content-wrapper {
  flex-grow: 1;
  background-color: var(--background-gray);
  padding: 0;
  display: flex;
  justify-content: center;
}

.content {
  background-color: var(--white-color);
  max-width: 1300px;
  width: 100%;
  padding: 40px 50px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  border-radius: 1px;
  margin: 0 auto;
}

/* H2 i ul – mniejsze odstępy w sekcjach */
.content h2 {
  text-align: left;
  margin-top: 20px;  
  margin-bottom: 10px; 
  color: #000000;
  font-size: 1.1rem;
}

.content ul {
  margin-top: 5px;  
  margin-bottom: 15px;
  padding-left: 20px;
}

/* Kategorie (Realizacje) */
.categories-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.categories-list li {
  background: #ffffff;
  border: 1px solid #ddd;
  padding: 15px;
  text-align: center;
  cursor: pointer;
  border-radius: 4px;
  box-shadow: 0 0 5px #ccc;
  transition: box-shadow 0.3s ease;
}

.categories-list li:hover {
  box-shadow: 0 0 12px var(--menu-blue);
}

.categories-list img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  margin-top: 10px;
  border-radius: 4px;
}

/* Ukryte galerie */
.gallery {
  display: none;
}

/* Kontakt - Flexbox dla tekstu i mapy */
.contact-flex {
  display: flex;
  gap: 30px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.contact-info, .map-container {
  flex: 1 1 400px;
  max-width: 600px;
}

.map-container iframe {
  width: 100%;
  height: 300px;
  border: 0;
}

/* FOOTER */
footer {
  background-color: var(--menu-blue);
  color: var(--footer-text);
  padding: 15px 20px;
  flex-shrink: 0;
  font-weight: 300;
}

footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-flex {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--footer-text);
}

.address {
  flex: 1 1 auto;
  min-width: 200px;
  line-height: 1.4;
  margin-bottom: 5px;
}

.footer-bottom {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-facebook img {
  width: 30px;
  height: 30px;
}

.footer-right {
  display: flex;
  flex-direction: row;
  gap: 5px;
  flex-wrap: wrap;
  align-items: center;
  text-align: left;
}

.footer-right .privacy-link {
  color: var(--footer-text);
  text-decoration: underline;
  font-weight: 400;
  transition: color 0.3s ease;
}

.footer-right .privacy-link:hover,
.footer-right .privacy-link:focus {
  color: var(--white-color);
  outline: none;
}

/* Responsywność stopki */
@media (max-width: 600px) {
  .footer-flex {
    flex-direction: column;
    gap: 5px;
    align-items: flex-start;
  }

  .address {
    width: 100%;
    margin-bottom: 5px;
  }

  .footer-bottom {
    flex-wrap: wrap;
    gap: 5px;
    align-items: center;
  }

  .footer-facebook,
.footer-right {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  margin-right: 20px;
}

  .footer-right {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    text-align: left;
  }
}

/* Galeria */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto 40px auto;
}

.gallery-grid img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 0 6px #aaa;
}

.gallery-grid img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px var(--menu-blue);
}

/* Lightbox overlay */
.lightbox {
  position: fixed;
  display: none;
  justify-content: center;
  align-items: center;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0,0,0,0.9);
  z-index: 9999;
  flex-direction: column;
  gap: 15px;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 6px;
  box-shadow: 0 0 20px #000;
  user-select: none;
}

.close {
  color: white;
  font-size: 2.5rem;
  cursor: pointer;
  position: absolute;
  top: 20px;
  right: 30px;
  user-select: none;
}

.navigation {
  display: flex;
  gap: 15px;
}

.navigation button {
  background: none;
  border: 2px solid white;
  color: white;
  font-size: 1.6rem;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease;
}

.navigation button:hover {
  background-color: white;
  color: black;
}

/* CERTYFIKATY */
.certificates-list {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 25px;
  max-width: 1000px;
}

.certificates-list li {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 10px;
  box-shadow: 0 0 7px #ccc;
  cursor: pointer;
  transition: box-shadow 0.3s ease;
  text-align: center;
}

.certificates-list li:hover {
  box-shadow: 0 0 14px var(--menu-blue);
}

.certificates-list img {
  max-width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 4px;
  user-select: none;
}

/* FORMULARZ KONTAKTOWY */
.contact-form {
  margin-top: 30px;
  padding: 25px;
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 6px;
  max-width: 600px;
}

.contact-form h3 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  padding: 8px 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 0.9rem;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form button {
  margin-top: 10px;
  padding: 10px;
  background: var(--menu-blue);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

.contact-form button:hover {
  background: #005fa3;
}

/* NOWOCZESNA PODSTRONA KONTAKTOWA */
.modern-contact {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.modern-info, .modern-form, .modern-map {
  flex: 1 1 300px;
  min-width: 280px;
  background: #fff;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.modern-info h2,
.modern-form h2,
.modern-map h2 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 1.4rem;
  color: #0077cc;
}

.modern-info p {
  margin: 10px 0;
  font-size: 0.95rem;
}

.modern-info i {
  color: #0077cc;
  margin-right: 8px;
}

.modern-info a {
  color: #0077cc;
  text-decoration: none;
  transition: color 0.3s;
}

.modern-info a:hover {
  color: #005fa3;
}

.modern-form input,
.modern-form textarea {
  width: 100%;
  padding: 10px;
  font-size: 0.95rem;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.modern-form button {
  margin-top: 15px;
  width: 100%;
  padding: 12px;
  background: #0077cc;
  color: #fff;
  font-size: 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

.modern-form button:hover {
  background: #005fa3;
}

.modern-map iframe {
  border-radius: 5px;
}

/* RESPONSYWNE MOBILE */
@media (max-width: 900px) {
  .modern-contact {
    flex-direction: column;
  }
}