/* Reset и базовые стили */
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Montserrat', sans-serif;
      background: linear-gradient(135deg, #1b2735, #090a0f);
      color: #eee;
      min-height: 100vh;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    a {
      color: #ffb347;
      text-decoration: none;
      transition: color 0.3s ease;
    }
    a:hover, a:focus {
      color: #ffd580;
      outline: none;
    }

    header {
      position: sticky;
      top: 0;
      background: rgba(27, 39, 53, 0.95);
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 30px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.7);
      z-index: 1000;
      user-select: none;
    }
    header h1 {
      font-weight: 900;
      font-size: 1.6rem;
      letter-spacing: 0.1em;
    }
    nav {
      display: flex;
      gap: 24px;
      font-weight: 600;
      text-transform: uppercase;
      font-size: 0.9rem;
    }
    nav a {
      cursor: pointer;
    }

    /* Hero */
    .hero {
      max-width: 900px;
      margin: 60px auto 80px;
      background: rgba(255, 179, 71, 0.15);
      padding: 60px 30px 50px;
      border-radius: 20px;
      text-align: center;
    }
    .hero h2 {
      font-weight: 900;
      font-size: 3.4rem;
      margin: 0 0 20px;
      color: #ffb347;
      text-shadow: 0 0 12px rgba(255,179,71,0.7);
      user-select: text;
    }
    .hero p {
      font-weight: 600;
      font-size: 1.3rem;
      margin-bottom: 40px;
      color: #ffd580cc;
      user-select: text;
    }
    .hero button {
      background: #ffb347;
      border: none;
      padding: 18px 64px;
      font-weight: 900;
      font-size: 1.4rem;
      color: #1b2735;
      border-radius: 50px;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(255, 179, 71, 0.7);
      transition: background-color 0.3s ease, transform 0.3s ease;
      user-select: none;
    }
    .hero button:hover,
    .hero button:focus {
      background: #ffd580;
      box-shadow: 0 12px 40px rgba(255, 213, 128, 0.9);
      transform: translateY(-6px);
      outline: none;
    }

    /* Услуги */
    section {
      max-width: 900px;
      margin: 0 auto 70px;
      padding: 40px 30px;
      background: rgba(27, 39, 53, 0.7);
      border-radius: 20px;
      box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
      user-select: none;
    }
    section h2 {
      color: #ffb347;
      font-weight: 900;
      font-size: 2.8rem;
      margin-bottom: 30px;
      text-align: center;
      text-shadow: 0 0 12px rgba(255,179,71,0.7);
    }
    #uslugi ul {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 22px;
      padding: 0;
      list-style: none;
    }
    #uslugi ul li {
      background: rgba(255, 179, 71, 0.3);
      padding: 18px 30px;
      border-radius: 40px;
      font-weight: 700;
      font-size: 1.2rem;
      color: #1b2735;
      min-width: 180px;
      text-align: center;
      transition: background-color 0.3s ease, color 0.3s ease;
      cursor: default;
      user-select: none;
    }
    #uslugi ul li:hover {
      background: #ffb347;
      color: #1b2735;
      box-shadow: 0 0 35px #ffb347;
    }

    /* Калькулятор */
    #calc form {
      display: flex;
      flex-direction: column;
      gap: 20px;
      max-width: 480px;
      margin: 0 auto;
      font-weight: 600;
      color: #ffd580;
    }
    label {
      display: flex;
      flex-direction: column;
      font-size: 1rem;
    }
    input, select, textarea {
      margin-top: 6px;
      padding: 14px 20px;
      font-size: 1.1rem;
      font-weight: 500;
      border-radius: 12px;
      border: none;
      background: #1b2735;
      color: #ffd580;
      box-shadow: inset 0 0 8px rgba(255, 179, 71, 0.3);
      transition: box-shadow 0.3s ease, background-color 0.3s ease;
      resize: vertical;
    }
    input:focus, select:focus, textarea:focus {
      outline: none;
      box-shadow: 0 0 15px #ffb347;
      background-color: #294e61;
      color: #fff;
    }
    button.calc-btn {
      background: #ffb347;
      color: #1b2735;
      font-weight: 900;
      padding: 18px 0;
      border-radius: 40px;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 25px rgba(255, 179, 71, 0.7);
      transition: background-color 0.3s ease, transform 0.3s ease;
      user-select: none;
      font-size: 1.3rem;
    }
    button.calc-btn:hover,
    button.calc-btn:focus {
      background: #ffd580;
      box-shadow: 0 10px 30px rgba(255, 213, 128, 0.9);
      transform: translateY(-5px);
      outline: none;
    }
    .result {
      margin-top: 20px;
      text-align: center;
      font-weight: 900;
      font-size: 1.4rem;
      color: #ffb347;
      text-shadow: 0 0 15px rgba(255, 179, 71, 0.9);
      user-select: none;
      min-height: 40px;
    }

    /* Форма заявки */
    #contact form {
      max-width: 480px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 18px;
      color: #ffd580;
      font-weight: 600;
    }
    #contact input, #contact textarea {
      background: #1b2735;
      color: #ffd580;
      padding: 14px 20px;
      border-radius: 12px;
      border: none;
      font-size: 1.1rem;
      box-shadow: inset 0 0 8px rgba(255, 179, 71, 0.3);
      transition: box-shadow 0.3s ease, background-color 0.3s ease;
      resize: vertical;
    }
    #contact input:focus, #contact textarea:focus {
      outline: none;
      box-shadow: 0 0 15px #ffb347;
      background-color: #294e61;
      color: #fff;
    }
    #contact button {
      background: #ffb347;
      color: #1b2735;
      font-weight: 900;
      padding: 18px 0;
      border-radius: 40px;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 25px rgba(255, 179, 71, 0.7);
      transition: background-color 0.3s ease, transform 0.3s ease;
      user-select: none;
      font-size: 1.3rem;
    }
    #contact button:hover,
    #contact button:focus {
      background: #ffd580;
      box-shadow: 0 10px 30px rgba(255, 213, 128, 0.9);
      transform: translateY(-5px);
      outline: none;
    }

    /* Футер */
    footer {
      text-align: center;
      padding: 20px;
      font-weight: 600;
      font-size: 0.9rem;
      letter-spacing: 0.05em;
      color: #888;
      user-select: none;
      margin-bottom: 20px;
    }

    /* Адаптив */
    @media (max-width: 720px) {
      .hero h2 {
        font-size: 2.6rem;
      }
      section {
        margin: 40px 20px 60px;
        padding: 30px 20px;
      }
      nav {
        gap: 16px;
        font-size: 0.85rem;
      }
      #uslugi ul li {
        min-width: 140px;
        font-size: 1rem;
      }
    }
    @media (max-width: 480px) {
      header {
        flex-direction: column;
        align-items: center;
        padding: 15px 15px;
      }
      nav {
        margin-top: 10px;
        width: 100%;
        justify-content: center;
        gap: 12px;
      }
      nav a {
        font-size: 0.8rem;
      }
      .hero h2 {
        font-size: 2rem;
      }
      .hero p {
        font-size: 1rem;
      }
      section {
        margin: 30px 10px 40px;
        padding: 25px 15px;
      }
      #calc form,
      #contact form {
        max-width: 100%;
      }
    }