/* VISIOBOX FIDS — дизайн-токены из Figma (tmp/design.css) */
:root {
  --bg: #000000;
  --bg-alt: #111A19;
  --accent: #00AE99;
  --accent-hover: #009987;
  --text: #FFFFFF;
  --text-dim: #757575;
  --line: #0D3F39;
  --container: 1440px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Roboto', Arial, sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.5;
}

img, video { max-width: 100%; height: auto; display: block; }

h1, h2, h3 { font-weight: 400; line-height: 1.2; margin: 0 0 24px; }

p { margin: 0 0 16px; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* Кнопки */
.btn {
  display: inline-block;
  padding: 16px 40px;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-weight: 400;
  font-size: 15px;
  line-height: 1;
  border: 0;
  border-radius: 0;
  cursor: pointer;
  text-align: center;
  transition: background-color 0.2s ease-in-out;
}
.btn:hover { background: var(--accent-hover); }
.btn--wide { width: 100%; }

/* Шапка */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: #000;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 31px 40px;
}
.header__logo img { width: 140px; height: 38px; }
.header__nav {
  display: flex;
  gap: 40px;
}
.header__nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 400;
  font-size: 16px;
  transition: color 0.2s ease-in-out;
}
.header__nav a:hover { color: var(--accent); }
.header__actions { display: flex; align-items: center; gap: 16px; }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: 1px solid var(--line);
  cursor: pointer;
}
.burger span {
  display: block;
  height: 2px;
  background: var(--text);
}

/* Hero */
.hero { padding: 135px 0 90px; }
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero h1 { font-size: 48px; }
.lead {
  color: var(--text-dim);
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 40px;
}
.hero__media img,
.hero__media video,
.hero__illu { width: 100%; height: auto; display: block; }
.hero__illu { aspect-ratio: 596 / 506; background: #000; }

.case__media img,
.case__media video,
.case__illu { width: 100%; height: auto; display: block; }
.case__illu { aspect-ratio: 596 / 506; background: #000; }
.case__illu--wide { aspect-ratio: 770 / 506; background: #111A19; }

/* Фичи */
.features { padding: 150px 0; }
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.feature { text-align: center; }
.feature__icon {
  width: 200px;
  height: 200px;
  object-fit: contain;
  margin: 0 auto 32px;
}
.feature h2 { font-size: 32px; }
.feature p { color: var(--text-dim); font-size: 16px; }

/* Кейсы */
.case { padding: 135px 0; }
.case--alt { background: var(--bg-alt); }
.case__inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 100px;
  align-items: center;
}
.case__inner--reverse { grid-template-columns: 2fr 1fr; }
.case__inner--reverse .case__text { order: 2; }
.case__inner--reverse .case__media { order: 1; }
.case h2 { font-size: 32px; }
.case__lead {
  color: var(--text-dim);
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 32px;
}
.list {
  list-style: none;
  margin: 0 0 40px;
  padding: 0;
  color: var(--text-dim);
}
.list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
}
.list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent);
}

/* Подвал */
.footer {
  background: #181818;
  padding: 75px 0 90px;
}
.footer__inner {
  display: grid;
  grid-template-columns: 8fr 2fr 2fr;
  gap: 40px;
}
.footer__col h3 {
  font-size: 16px;
  color: var(--text);
  font-weight: 400;
  margin-bottom: 16px;
}
.footer__col a,
.footer__col span {
  display: block;
  color: var(--text-dim);
  text-decoration: none;
  margin-bottom: 10px;
  font-size: 16px;
}
.footer__col a:hover { color: var(--accent); }
.footer__col--brand p {
  color: var(--text-dim);
  font-size: 16px;
  margin-top: 20px;
}

/* Модалки */
.modal { position: fixed; inset: 0; z-index: 100; }
.modal[hidden] { display: none; }
.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
}
.modal__box {
  position: relative;
  max-width: 520px;
  margin: 10vh auto 0;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 48px;
}
.modal__box h2 { font-size: 32px; }
.modal__box p { color: var(--text-dim); }
.modal__lead { font-size: 20px; }
.modal__box a { color: var(--accent); text-decoration: none; }
.modal__box a:hover { text-decoration: underline; }
.modal__close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: 0;
  color: var(--text-dim);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
}
.modal__close:hover { color: var(--text); }

/* Форма */
.field { margin-bottom: 20px; }
.field label {
  display: block;
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 8px;
}
.field input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  font-family: inherit;
  font-size: 16px;
}
.field input:focus {
  outline: none;
  border-color: var(--accent);
}
.field input.is-invalid { border-color: #FF3500; }
.form__note {
  margin-top: 16px;
  color: var(--accent);
  font-size: 14px;
}

/* Адаптив */
@media (max-width: 960px) {
  .header__inner { padding: 14px 20px; }
  .header__logo img { width: 132px; height: 36px; }
  .hero { padding: 90px 0 60px; }
  .hero__inner,
  .case__inner,
  .case__inner--reverse { grid-template-columns: 1fr; gap: 40px; }
  /* на мобильном эталон показывает иллюстрацию выше текста */
  .hero__media,
  .case__media,
  .case__inner--reverse .case__media { order: -1; }
  .case__inner--reverse .case__text { order: 0; }
  .features { padding: 90px 0; }
  .features__grid { grid-template-columns: 1fr; gap: 60px; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 34px; }
  .case h2 { font-size: 30px; }
  .feature h2 { font-size: 28px; }
  .case { padding: 60px 0; }
  .header__actions .btn { display: none; }

  .burger { display: flex; }
  .header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    background: rgba(0, 0, 0, 0.97);
    border-top: 1px solid var(--line);
  }
  .header__nav.is-open { display: flex; }
  .header__nav a {
    padding: 16px 20px;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  .footer__inner { grid-template-columns: 1fr; }
  .modal__box { margin: 5vh 16px 0; padding: 32px 24px; }
  .hero h1 { font-size: 28px; }
}