/* depth-scroll.css — магнит (scroll-snap) + секции ровно в один экран.
   Контент подгоняется под высоту через depth-scroll.js (--ds-fit / zoom).
   Без JS (нет html.ds-on) файл ничего не меняет.
   Выключить: уберите link/script из index.html или добавьте ?nodepth */

/* scroll-behavior:auto — иначе smooth ломает mandatory snap в Chrome/Safari */
html.ds-on {
  scroll-snap-type: y mandatory;
  scroll-padding-top: 0;
  scroll-behavior: auto;
  --ds-pad-top: calc(var(--header-h) + clamp(6px, 1.8svh, 16px));
  --ds-pad-bottom: clamp(8px, 2.2svh, 24px);
}

/* Каждая секция — ровно один экран */
html.ds-on main > section,
html.ds-on body > .footer {
  scroll-snap-align: start;
  scroll-margin-top: 0;
  box-sizing: border-box;
  height: 100vh;
  height: 100svh;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding-top: var(--ds-pad-top) !important;
  padding-bottom: var(--ds-pad-bottom) !important;
  padding-left: 0;
  padding-right: 0;
  /* visible: секция не перехватывает колесо, листается страница */
  overflow: visible;
  overscroll-behavior: auto;
}
@supports (height: 100dvh) {
  html.ds-on main > section { height: 100dvh; }
}
@supports (height: 100svh) {
  html.ds-on main > section { height: 100svh; }
}

html.ds-on main > section > .container {
  margin-block: auto;
  width: 100%;
  max-width: var(--container, 1200px);
  flex: 0 1 auto;
}

/* запасной внутренний скролл не запирает страницу: жест уходит дальше */
html.ds-on main > section.ds-overflow {
  overflow-y: auto;
  overscroll-behavior-y: auto;
  scrollbar-width: thin;
}

html.ds-on main > section.hero { padding-bottom: var(--ds-pad-bottom); }

/* Декор формы аудита */
html.ds-on .lead .star-system {
  top: 0;
  height: 100%;
  transform: translateX(-50%);
  overflow: hidden;
}

/* Подвал */
html.ds-on body > .footer {
  height: auto;
  min-height: 0;
  scroll-snap-align: end;
  padding-top: 40px;
  padding-bottom: 40px;
  overflow: visible;
  display: block;
}

/* Сертификация: без 3D, жёстко вписываем в один экран */
html.ds-on #partner .cert { perspective: none; max-width: none; height: 100%; max-height: 100%; display: flex; align-items: center; }
html.ds-on #partner .cert__frame {
  transform: none;
  padding: clamp(6px, 1.2svh, 12px);
  border-radius: 18px;
  max-height: calc(100svh - var(--header-h) - 40px);
  width: 100%;
}
html.ds-on #partner .cert__frame:hover,
html.ds-on #partner .cert__frame:focus-visible { transform: translateY(-3px); }
html.ds-on #partner .cert__img {
  width: 100%;
  height: auto;
  max-height: calc(100svh - var(--header-h) - 64px);
  object-fit: contain;
}
html.ds-on #partner .cert__zoom {
  top: 12px; right: 12px; padding: 6px 10px; font-size: 12px;
}
html.ds-on #partner .partner-sec__grid {
  height: 100%;
  max-height: 100%;
  align-items: start;
  column-gap: clamp(20px, 3vw, 48px);
  row-gap: clamp(8px, 1.5svh, 16px);
}
html.ds-on #partner .partner-sec__head { align-self: start; margin: 0; }
html.ds-on #partner .partner-sec__body { align-self: start; }
html.ds-on #partner .section__title { font-size: clamp(26px, 3.6svh, 36px); }
html.ds-on #partner .partner-sec__lead {
  margin: clamp(6px, 1.2svh, 12px) 0 clamp(8px, 1.5svh, 14px);
  font-size: clamp(16px, 2.1svh, 18px);
  line-height: 1.4;
}
html.ds-on #partner .partner-list { gap: clamp(5px, 1svh, 10px); margin-bottom: clamp(8px, 1.4svh, 14px); }
html.ds-on #partner .partner-list__item {
  padding: clamp(7px, 1.1svh, 12px) clamp(10px, 1.2vw, 14px);
  gap: 10px;
}
html.ds-on #partner .partner-list__item b { font-size: clamp(15px, 1.9svh, 17px); margin-bottom: 2px; }
html.ds-on #partner .partner-list__item > span:last-child { font-size: clamp(14.5px, 1.8svh, 16px); line-height: 1.4; }
html.ds-on #partner .partner-list__icon { width: 34px; height: 34px; border-radius: 10px; }
html.ds-on #partner .partner-list__icon svg { width: 18px; height: 18px; }
html.ds-on #partner .partner-meta { gap: 8px; }
html.ds-on #partner .partner-meta div { padding: 6px 12px; }
html.ds-on #partner .partner-meta dd { font-size: 15px; }

/* ---- Плотность от высоты экрана (до JS-fit) ---- */
html.ds-on .section__head { margin-bottom: clamp(10px, 3.2svh, 48px); }
html.ds-on .section__title { font-size: clamp(26px, 2.8svh + 1.2vw, 48px); }
html.ds-on .partner-sec__lead { margin: clamp(8px, 1.8svh, 22px) 0 clamp(10px, 2.2svh, 30px); }
html.ds-on .partner-list { gap: clamp(6px, 1.2svh, 14px); margin-bottom: clamp(10px, 2svh, 30px); }
html.ds-on .solution__cards { gap: clamp(10px, 1.6svh, 20px); }
html.ds-on .results__grid { gap: clamp(10px, 1.6svh, 20px); }
html.ds-on .stat { padding: clamp(16px, 3svh, 40px) 16px clamp(14px, 2.5svh, 34px); }
html.ds-on .card { padding: clamp(14px, 2.2svh, 28px) clamp(14px, 1.5vw, 28px); }
html.ds-on .lead__panel { padding: clamp(18px, 3.5svh, 56px) clamp(18px, 3vw, 56px); gap: clamp(18px, 3svh, 56px); }
html.ds-on .orbit-system { max-width: min(480px, 48svh); }
html.ds-on .cert { max-width: min(100%, 52svh); }
html.ds-on .hero__visual { height: min(36vh, 42svh, 400px); }
html.ds-on .hero__title { margin-bottom: clamp(10px, 2svh, 24px); }
html.ds-on .hero__subtitle { margin-bottom: clamp(12px, 2.4svh, 36px); }
html.ds-on .timeline { gap: clamp(10px, 2svh, 24px); }

/* тяжёлые секции: сильнее уплотняем, чтобы реже упираться в min-scale */
html.ds-on #problem .problem__grid { gap: clamp(10px, 1.5svh, 22px); }
html.ds-on #problem .problem__stat { margin-top: clamp(12px, 2svh, 28px); padding: clamp(14px, 2svh, 28px) clamp(16px, 2vw, 34px); }
html.ds-on #problem .mini-hole { max-width: min(220px, 28svh); }
html.ds-on #solution .solution__grid { gap: clamp(16px, 2.5svh, 36px); }
html.ds-on #lead .lead__panel { padding: clamp(14px, 2.5svh, 40px) clamp(14px, 2.5vw, 40px); gap: clamp(14px, 2.5svh, 36px); }
html.ds-on #lead .lead-form { gap: clamp(6px, 1svh, 12px); }
html.ds-on #lead .checks { gap: clamp(4px, 0.8svh, 10px); }
html.ds-on #lead .check { font-size: clamp(14px, 1.7svh, 15.5px); line-height: 1.4; }
html.ds-on #lead .lead-form .field input,
html.ds-on #lead .lead-form .select select { height: clamp(40px, 5.2svh, 54px); }

@media (max-height: 700px) and (min-width: 861px) {
  html.ds-on main > section {
    --ds-pad-top: calc(var(--header-h) + 6px);
    --ds-pad-bottom: 10px;
  }
  html.ds-on .hero__visual { height: min(26vh, 28svh, 240px); }
  html.ds-on .lead-form .field input,
  html.ds-on .lead-form .select select { height: 42px; }
  html.ds-on .check { font-size: 14px; line-height: 1.4; }
  html.ds-on .checks { gap: 6px; }
}

/* Мобильный: без snap/scale — секции текут естественно, текст читаемый */
@media (max-width: 860px) {
  html.ds-on {
    scroll-snap-type: none;
    scroll-behavior: smooth;
  }
  html.ds-on main > section,
  html.ds-on body > .footer {
    height: auto !important;
    min-height: 0;
    display: block;
    overflow: visible;
    scroll-snap-align: none;
  }
  /* снимаем ds-паддинги — работают отступы из style.css */
  html.ds-on main > section.section {
    padding: 96px 0 !important;
  }
  html.ds-on main > section.section + section.section {
    padding-top: 104px !important;
  }
  html.ds-on main > section.hero {
    padding-top: calc(var(--header-h) + 4px) !important;
    padding-bottom: 72px !important;
  }
  html.ds-on main > section.lead {
    padding: 104px 0 96px !important;
  }
  html.ds-on body > .footer {
    padding-top: 40px !important;
    padding-bottom: 40px !important;
  }
  html.ds-on main > section > .container {
    margin-block: 0;
    transform: none !important;
    margin-bottom: 0 !important;
    margin-top: 0 !important;
  }
  html.ds-on #partner .cert,
  html.ds-on #partner .cert__frame,
  html.ds-on #partner .cert__img,
  html.ds-on #partner .partner-sec__grid {
    max-height: none;
    height: auto;
  }
  html.ds-on #partner .cert__frame {
    max-height: none;
  }
  html.ds-on .hero__visual { height: min(36vh, 78vw, 320px); }
  html.ds-on .orbit-system { max-width: min(420px, 70vw); }
  /* сбрасываем десктопное уплотнение — иначе текст снова мельчает */
  html.ds-on .section__head { margin-bottom: 28px; }
  html.ds-on .section__title { font-size: clamp(28px, 7.4vw, 36px); }
  html.ds-on .card { padding: 16px; }
  html.ds-on #problem .problem__grid { gap: 12px; }
  html.ds-on #problem .problem__stat { margin-top: 16px; padding: 20px 18px; }
  html.ds-on #problem .mini-hole { max-width: 180px; }
  html.ds-on .solution__cards { gap: 12px; }
  html.ds-on #lead .lead__panel { padding: 28px 18px; gap: 28px; }
  html.ds-on #lead .lead-form { gap: 12px; }
  html.ds-on #lead .checks { gap: 12px; }
  html.ds-on #lead .lead-form .field input,
  html.ds-on #lead .lead-form .select select { height: 52px; }
  html.ds-on #lead .check { font-size: 15.5px; line-height: 1.45; }
  html.ds-on .partner-sec__lead { margin: 16px 0 22px; }
  html.ds-on .partner-list { gap: 12px; margin-bottom: 20px; }
  html.ds-on #partner .section__title { font-size: clamp(28px, 7vw, 36px); }
  html.ds-on #partner .partner-sec__lead { font-size: 18.5px; line-height: 1.5; }
  html.ds-on #partner .partner-list__item {
    padding: 16px;
    gap: 14px;
  }
  html.ds-on #partner .partner-list__item b { font-size: 17px; }
  html.ds-on #partner .partner-list__item > span:last-child { font-size: 16.5px; line-height: 1.45; }
  html.ds-on #partner .partner-meta dd { font-size: 18px; }
  html.ds-on .cert { max-width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html.ds-on { scroll-snap-type: none; }
}