/* === CSS Reset / Normalize === */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
    "Helvetica Neue", sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Типографика === */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 0.5em;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: #667eea;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #764ba2;
}

/* === Списки === */
ul,
ol {
  list-style-position: inside;
  margin-bottom: 1rem;
}

/* === Изображения === */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* === Формы === */
input,
textarea,
select,
button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

input,
textarea {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s;
  background: white;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: #667eea;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* === Утилиты === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}

/* === Адаптивность === */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
}