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

html, body {
  height: 100%;
  display: flex;
  flex-direction: column;
}

body {
  background: #f5f7fa;
  color: #222;
  line-height: 1.5;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Хедер */
.header {
  background: #1c2b3a;
  color: #fff;
  padding: 15px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  font-size: 1.3rem;
  font-weight: 700;
}

.logo img {
  width: 120px;
  margin-right: 10px;
}

.phone {
  font-weight: 600;
  font-size: 0.95rem;
}


.nav ul {
  list-style: none;
  display: flex;
  gap: 50px;
  margin-left: -10px;
}

.nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s;
}

.nav a:hover {
  color: #4da6ff;
}


.footer {
  background: #1c2b3a;
  color: #aaa;
  text-align: center;
  padding: 25px 0;
  font-size: 0.95rem;
  margin-top: auto;
}



.about {
  padding: 40px 0;
  background: #eef2f7;
  color: #333;
} 

.about-wrapper {
  padding: 40px 0;
  background: #eef2f7;
  color: #333;
}

.about h2, .about-wrapper h2 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 10px;
}

.about h3 {
  text-align: center;
}

.about p, .mobile-boilers-text p {
  max-width: 1000px;
  margin: 15px auto;
  font-size: 1rem;
  line-height: 1.8;
  text-align: justify;
  text-indent: 25px;
}

.about ul, .mobile-boilers-text ul {
  max-width: 1000px;
  margin: 10px auto;
  padding-left: 20px;
  list-style: disc;
}

.about li, .mobile-boilers-text li {
  margin-bottom: 8px;
  font-size: 1rem;
  line-height: 1.6;
}

.about-text {
  flex: 1 1 55%;
}



.mobile-boilers-wrapper {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 30px 0;
  padding-left: 30px;
}

.mobile-boilers-text {
  flex: 1 1 55%;
}

.mobile-boilers-text h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.mobile-boilers-text h3 {
  font-size: 1.4rem;
  margin: 25px 0 10px;
}

.mobile-boilers-images {
  flex: 1 1 45%;
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 50px;
}

.mobile-boilers-images img {
  width: 90%;
  max-width: 300px;
  height: auto;
  border-radius: 20px;
  object-fit: cover;
  align-self: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

/* Tables General */
.pdk-table, .rental-table, .air-heater-table {
  width: 100%;
  border-collapse: collapse;
  text-align: center;
  font-size: 1rem;
}

.pdk-table th, .pdk-table td,
.rental-table th, .rental-table td,
.air-heater-table th, .air-heater-table td {
  border: 1px solid #ccc;
  padding: 10px 8px;
}

.pdk-table th, .rental-table th, .air-heater-table th {
  background-color: #d9ecff;
  font-weight: 600;
}

.pdk-table tr:nth-child(even),
.rental-table tr:nth-child(even),
.air-heater-table tr:nth-child(even) {
  background-color: #f0f8ff;
}

.pdk-table td,
.rental-table td,
.air-heater-table td {
  vertical-align: middle;
}

.pdk-table-wrapper,
.rental-table-wrapper,
.air-heater-table-wrapper {
  overflow-x: auto;
}


.pdk-table-section,
.rental-table-section,
.air-heater-rental-section,
.pdk-included-section {
  padding: 40px 0;
}

.pdk-included-section {
  padding-bottom: 30px;
}

.air-heater-included-section {
  padding-bottom: 100px;
}

.pdk-included-section h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  text-align: left;
}

.pdk-included-list {
  max-width: 800px;
  margin-left: 40px;
  font-size: 1rem;
  line-height: 1.8;
}

.pdk-included-list li {
  margin-bottom: 10px;
}

.pdk-note {
  text-align: center;
  font-weight: 600;
  margin-top: 15px;
}


.rental-images {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 25px;
}

.rental-images img {
  width: 360px;
  height: 240px;
  object-fit: cover;
  border-radius: 15px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.wrapper {
  margin-bottom: 100px; 
}

.container.cards {
  display: flex;
  gap: 20px;
  justify-content: center;
   margin-bottom: 30px;
}

.btn {
  padding: 15px 30px;
  border: none;
  border-radius: 20px; 
  font-size: 18px;
  cursor: pointer;
  background-color: #113b57; 
  color: white;
  transition: 0.3s;
}

.btn:hover {
  background-color: #2980b9; 
}

/* 📱 Планшеты */
@media (max-width: 992px) {
  .header .container {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    text-align: center;
  }

  .nav ul {
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .phone {
    font-size: 1rem;
  }

  .mobile-boilers-wrapper {
    flex-direction: column;
    align-items: center;
    padding-left: 0;
  }

  .mobile-boilers-text, 
  .mobile-boilers-images {
    flex: 1 1 100%;
    text-align: center;
  }

  .mobile-boilers-text p, 
  .mobile-boilers-text ul {
    text-align: left;
  }

  .mobile-boilers-images {
    margin-top: 20px;
  }

  .mobile-boilers-images img {
    max-width: 80%;
  }

  .rental-images {
    flex-wrap: wrap;
  }

  .rental-images img {
    width: 45%;
    height: auto;
  }
}

/* 📱 Телефоны */
@media (max-width: 590px) {
  .logo img {
    width: 90px;
  }

  .nav ul {
    flex-direction: column;
    gap: 10px;
  }

  .mobile-boilers-text h2 {
    font-size: 1.5rem;
  }

  .mobile-boilers-text h3 {
    font-size: 1.1rem;
  }

  .mobile-boilers-text p {
    font-size: 0.95rem;
    text-align: left;
  }

  .mobile-boilers-images img {
    width: 100%;
    max-width: 300px;
  }

  .rental-images img {
    width: 100%;
    max-width: 280px;
  }

  table {
    font-size: 0.9rem;
  }

  .btn {
    flex: 1 1 calc(50% - 10px);
    min-width: 120px;
    font-size: 0.9rem;
    padding: 10px 12px;
    text-align: center;
  }

  .container.cards {
    flex-wrap: wrap;
    gap: 10px;
  }
}

/* Гамбургер и анимация меню */
.nav-toggle {
  display: none;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    font-size: 1.8rem;
    color: #fff;
    margin-left: 15px;
    cursor: pointer;
    z-index: 1000;
  }

  .nav ul {
    flex-direction: column;
    gap: 15px;
    background: #1c2b3a;
    padding: 15px;
    position: absolute;
    top: 60px;
    right: 10px;
    border-radius: 10px;
    z-index: 999;

    /* плавное раскрытие */
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.4s ease;
  }

  .nav.active ul {
    max-height: 400px;
    opacity: 1;
  }
}