/* =========================================================
   s.bushuev.net — установка RustDesk
   Шрифт и иконки локальные, внешних зависимостей нет.
   ========================================================= */

/* ---------- шрифт ---------- */
@font-face {
  font-family: 'TildaSans';
  font-style: normal;
  font-weight: 250 1000;
  font-display: swap;
  src: url('../fonts/TildaSans-VF.woff2') format('woff2-variations'),
       url('../fonts/TildaSans-VF.woff2') format('woff2');
}

/* ---------- база ---------- */
:root {
  --t-headline-font: 'TildaSans', Arial, sans-serif;
  --t-text-font: 'TildaSans', Arial, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: #edEEF0;
  color: #10161f;
  font-family: var(--t-text-font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { display: block; max-width: 100%; }

/* =========================================================
   Блок 1 — тёмный экран с файлом
   ========================================================= */
.vb-k7m-hero {
  --k7m-ink: #10161f;
  --k7m-paper: #edEEF0;
  --k7m-muted: #9aa4b1;
  --k7m-accent: #e4471b;
  --k7m-line: rgba(237, 238, 240, 0.16);
  background: var(--k7m-ink);
  color: var(--k7m-paper);
  font-family: var(--t-text-font);
  padding: clamp(48px, 7vw, 104px) clamp(20px, 5vw, 64px) clamp(56px, 8vw, 112px);
  position: relative;
  overflow: hidden;
}

.vb-k7m-hero__wrap {
  max-width: 1120px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.vb-k7m-hero__top {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.vb-k7m-hero__mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--t-headline-font);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--k7m-paper);
}

.vb-k7m-hero__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--k7m-accent);
  flex: none;
}

.vb-k7m-hero__rule {
  flex: 1;
  height: 1px;
  background: var(--k7m-line);
}

.vb-k7m-hero__status {
  font-size: 14px;
  color: var(--k7m-muted);
  white-space: nowrap;
}

.vb-k7m-hero__title {
  font-family: var(--t-headline-font);
  font-weight: 700;
  font-size: clamp(2.6rem, 8.5vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  text-wrap: balance;
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 15ch;
}

.vb-k7m-hero__title-accent { color: var(--k7m-accent); }

.vb-k7m-hero__lede {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.6;
  color: #c8cdd5;
  max-width: 58ch;
  margin: 0 0 clamp(32px, 5vw, 52px);
  text-wrap: pretty;
}

/* --- карточка файла --- */
.vb-k7m-file {
  background: var(--k7m-paper);
  color: var(--k7m-ink);
  border-radius: 4px;
  padding: clamp(20px, 3vw, 30px);
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 28px);
  flex-wrap: wrap;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.vb-k7m-file__icon {
  width: 56px;
  height: 56px;
  flex: none;
  display: grid;
  place-items: center;
  background: #ffffff;
  border: 1px solid #d5d8dd;
  border-radius: 3px;
}

.vb-k7m-file__icon img { width: 26px; height: 26px; display: block; }

.vb-k7m-file__meta { flex: 1 1 220px; min-width: 0; }

.vb-k7m-file__name {
  display: block;
  font-family: var(--t-headline-font);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  word-break: break-all;
}

.vb-k7m-file__info {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: #4a525c;
}

.vb-k7m-file__action { flex: none; }

.vb-k7m-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 26px;
  background: var(--k7m-ink);
  color: var(--k7m-paper);
  border: 1px solid var(--k7m-ink);
  border-radius: 3px;
  font-family: var(--t-headline-font);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.vb-k7m-btn svg { width: 18px; height: 18px; flex: none; }

.vb-k7m-btn:hover {
  background: var(--k7m-accent);
  border-color: var(--k7m-accent);
  color: var(--k7m-ink);
  transform: translateY(-2px);
}

.vb-k7m-btn:focus-visible {
  outline: 3px solid var(--k7m-accent);
  outline-offset: 3px;
}

@media (max-width: 640px) {
  .vb-k7m-file { flex-direction: column; align-items: stretch; }
  .vb-k7m-file__icon { width: 48px; height: 48px; }
  .vb-k7m-file__action,
  .vb-k7m-btn { width: 100%; }
  .vb-k7m-hero__status { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .vb-k7m-btn { transition: none; }
  .vb-k7m-btn:hover { transform: none; }
}

/* =========================================================
   Блок 2 — инструкция
   ========================================================= */
.vb-q4t-guide {
  --q4t-ink: #10161f;
  --q4t-bg: #edEEF0;
  --q4t-muted: #4a525c;
  --q4t-accent: #e4471b;
  --q4t-line: #d3d7dc;
  background: var(--q4t-bg);
  color: var(--q4t-ink);
  font-family: var(--t-text-font);
  padding: clamp(48px, 7vw, 104px) clamp(20px, 5vw, 64px) clamp(48px, 6vw, 88px);
}

.vb-q4t-guide__wrap { max-width: 1120px; margin: 0 auto; }

.vb-q4t-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: clamp(20px, 4vw, 48px);
  flex-wrap: wrap;
  margin-bottom: clamp(12px, 2vw, 20px);
}

.vb-q4t-head__title {
  font-family: var(--t-headline-font);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-wrap: balance;
  margin: 0;
}

.vb-q4t-progress { flex: 1 1 260px; max-width: 380px; }

.vb-q4t-progress__label {
  font-family: var(--t-headline-font);
  font-size: 14px;
  font-weight: 600;
  color: var(--q4t-muted);
  margin: 0 0 10px;
}

.vb-q4t-progress__count { color: var(--q4t-ink); }

.vb-q4t-progress__track {
  height: 6px;
  background: #dbdee3;
  border-radius: 999px;
  overflow: hidden;
}

.vb-q4t-progress__fill {
  height: 100%;
  width: 0%;
  background: var(--q4t-accent);
  border-radius: 999px;
  transition: width 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- шаги --- */
.vb-q4t-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.vb-q4t-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  padding: clamp(20px, 3vw, 30px) 0;
  border-top: 1px solid var(--q4t-line);
  transition: opacity 0.3s ease;
}

.vb-q4t-step:last-child { border-bottom: 1px solid var(--q4t-line); }

.vb-q4t-step__num {
  position: relative;
  width: clamp(58px, 8vw, 76px);
  height: clamp(58px, 8vw, 76px);
  flex: none;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1.5px solid var(--q4t-ink);
  border-radius: 50%;
  color: var(--q4t-ink);
  font-family: var(--t-headline-font);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  cursor: pointer;
  transition: background-color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              color 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.vb-q4t-step__num:hover { background: var(--q4t-accent); border-color: var(--q4t-accent); }

.vb-q4t-step__num:focus-visible { outline: 3px solid var(--q4t-accent); outline-offset: 3px; }

.vb-q4t-step__digit { display: block; grid-area: 1 / 1; transition: opacity 0.2s ease; }

.vb-q4t-step__check {
  grid-area: 1 / 1;
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.vb-q4t-step.is-done .vb-q4t-step__num {
  background: var(--q4t-ink);
  border-color: var(--q4t-ink);
  color: var(--q4t-bg);
}

.vb-q4t-step.is-done .vb-q4t-step__digit { opacity: 0; }
.vb-q4t-step.is-done .vb-q4t-step__check { opacity: 1; transform: scale(1); }

.vb-q4t-step__body { min-width: 0; }

.vb-q4t-step__title {
  font-family: var(--t-headline-font);
  font-weight: 600;
  font-size: clamp(1.2rem, 3vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
  transition: color 0.25s ease;
}

.vb-q4t-step.is-done .vb-q4t-step__title { color: var(--q4t-muted); }

.vb-q4t-step__hint {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--q4t-muted);
  max-width: 62ch;
}

.vb-q4t-step__hint b { font-weight: 600; color: var(--q4t-ink); }

.vb-q4t-step__icon {
  width: clamp(28px, 4vw, 36px);
  height: clamp(28px, 4vw, 36px);
  opacity: 0.75;
  flex: none;
}

.vb-q4t-note {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(18px, 3vw, 24px);
  background: #ffffff;
  border: 1px solid var(--q4t-line);
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.vb-q4t-note__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--q4t-muted);
  max-width: 60ch;
}

.vb-q4t-note__text b { color: var(--q4t-ink); font-weight: 600; }

.vb-q4t-note__link {
  font-family: var(--t-headline-font);
  font-size: 15px;
  font-weight: 600;
  color: var(--q4t-ink);
  text-decoration: none;
  border-bottom: 2px solid var(--q4t-accent);
  padding-bottom: 2px;
  transition: color 0.2s ease;
}

.vb-q4t-note__link:hover { color: var(--q4t-accent); }
.vb-q4t-note__link:focus-visible { outline: 3px solid var(--q4t-accent); outline-offset: 3px; }

.vb-q4t-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---- появление шагов ---- */
.vb-q4t-guide.is-ready .vb-q4t-step {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}
.vb-q4t-guide.is-ready .vb-q4t-step.is-visible { opacity: 1; transform: none; }
.vb-q4t-guide.is-ready .vb-q4t-step:nth-child(2).is-visible { transition-delay: 0.07s; }
.vb-q4t-guide.is-ready .vb-q4t-step:nth-child(3).is-visible { transition-delay: 0.14s; }
.vb-q4t-guide.is-ready .vb-q4t-step:nth-child(4).is-visible { transition-delay: 0.21s; }

@media (max-width: 760px) {
  .vb-q4t-step {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
  }
  .vb-q4t-step__icon { display: none; }
  .vb-q4t-step__num { margin-top: 2px; }
}

@media (max-width: 480px) {
  .vb-q4t-step { gap: 14px; }
  .vb-q4t-note { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  .vb-q4t-guide.is-ready .vb-q4t-step,
  .vb-q4t-guide.is-ready .vb-q4t-step.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .vb-q4t-progress__fill,
  .vb-q4t-step__num,
  .vb-q4t-step__check,
  .vb-q4t-step__digit { transition: none; }
}