/* ============================================================
   ORBIS — единая дизайн-система Mega Market
   Палитра сохранена: тёмная база (#0a0a0f) + оранжевый акцент (#ff8c00)
   Шрифты: Unbounded (дисплей) / Onest (текст) / JetBrains Mono (служебные)
   Геометрия: срезанные углы (cut-corner) вместо мягких радиусов
   ============================================================ */

/* ---------- 1. Токены ---------- */
:root {
    /* база (не меняем) */
    --bg: #0a0a0f;
    --bg-deep: #050508;
    --surface: #12121a;
    --surface-2: #1a1a25;
    --accent: #ff8c00;
    --accent-dim: #e07800;
    --accent-light: #ffb432;
    --muted: #6b7280;

    /* производные */
    --ink: #f2f3f7;
    --ink-2: #c9ccd6;
    --dim: #949aab;
    --line: rgba(255, 255, 255, .075);
    --line-2: rgba(255, 255, 255, .14);
    --line-accent: rgba(255, 140, 0, .34);
    --accent-soft: rgba(255, 140, 0, .12);
    --accent-softer: rgba(255, 140, 0, .06);

    /* геометрия */
    --cut: 16px;
    --cut-sm: 9px;
    --cut-lg: 26px;

    /* шрифты */
    --font-display: 'Unbounded', 'Onest', sans-serif;
    --font-body: 'Onest', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;

    /* тени */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, .35);
    --shadow: 0 14px 38px rgba(0, 0, 0, .45);
    --shadow-lg: 0 26px 70px rgba(0, 0, 0, .58);
    --glow: 0 0 0 1px rgba(255, 140, 0, .35), 0 14px 34px rgba(255, 140, 0, .18);

    --t: .22s cubic-bezier(.4, 0, .2, 1);
}

/* ---------- 2. База ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--ink);
    line-height: 1.62;
    font-size: 15.5px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* заголовки — гротеск Unbounded */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.14;
    letter-spacing: -.02em;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--accent); color: #14100a; }

/* геометрия: вместо мягких радиусов — почти прямые углы */
.rounded-lg { border-radius: 2px; }
.rounded-xl { border-radius: 3px; }
.rounded-2xl { border-radius: 4px; }
.rounded-3xl { border-radius: 4px; }

/* ---------- 3. Фоновые текстуры ---------- */
.grid-pattern {
    background-image:
        linear-gradient(rgba(255, 140, 0, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 140, 0, .045) 1px, transparent 1px),
        repeating-linear-gradient(135deg, rgba(255, 255, 255, .014) 0 2px, transparent 2px 9px);
    background-size: 64px 64px, 64px 64px, auto;
}

.hero-gradient {
    background:
        radial-gradient(ellipse 70% 60% at 12% 18%, rgba(255, 140, 0, .16) 0%, transparent 58%),
        radial-gradient(ellipse 55% 45% at 88% 8%, rgba(255, 180, 50, .08) 0%, transparent 60%),
        radial-gradient(ellipse 80% 50% at 50% 108%, rgba(255, 140, 0, .10) 0%, transparent 62%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

.hero-gradient::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .022) 0 1px, transparent 1px 92px);
    pointer-events: none;
}

/* ---------- 4. Служебные типографики ---------- */
.font-mono, .font-mono * { font-family: var(--font-mono) !important; }

.eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.eyebrow::before {
    content: '';
    width: 26px;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.index-num {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .18em;
    color: var(--muted);
    display: block;
    margin-bottom: 10px;
}

.index-num b { color: var(--accent); font-weight: 500; }

.mono-label {
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
}

.accent-text { color: var(--accent); }
.dim-text { color: var(--dim); }

/* ---------- 5. Панели со срезанными углами ---------- */
.cut, .cut-sm, .cut-lg {
    clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.cut-sm { --cut: var(--cut-sm); }
.cut-lg { --cut: var(--cut-lg); }

/* основная карточка/панель: срезанные углы + градиентная рамка */
.gradient-border {
    position: relative;
    background:
        linear-gradient(160deg, rgba(26, 26, 37, .92), rgba(10, 10, 15, .96)) padding-box,
        linear-gradient(135deg, rgba(255, 140, 0, .55), rgba(255, 255, 255, .06) 55%, rgba(255, 140, 0, .22)) border-box;
    border: 1px solid transparent;
    clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
    transition: transform var(--t), box-shadow var(--t), background var(--t);
}

/* акцентный уголок-«скобка» */
.gradient-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 46px;
    height: 46px;
    background: linear-gradient(135deg, var(--accent) 0 22%, transparent 22%);
    opacity: .85;
    pointer-events: none;
}

/* тонкая рамка без среза */
.frame {
    border: 1px solid var(--line);
    background: rgba(18, 18, 26, .55);
    transition: border-color var(--t), background var(--t);
}

.frame-accent { border-color: var(--line-accent); }

/* ---------- 6. Кнопки ---------- */
.btn-glow {
    position: relative;
    box-shadow: var(--glow);
    transition: transform var(--t), box-shadow var(--t), background var(--t);
}

.btn-glow:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(255, 140, 0, .55), 0 18px 44px rgba(255, 140, 0, .3); }

.btn-accent {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: #140d02;
    font-family: var(--font-body);
    font-weight: 700;
    padding: 13px 26px;
    letter-spacing: .01em;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
    transition: background var(--t), transform var(--t), box-shadow var(--t);
}

.btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--glow); }

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 26px;
    border: 1px solid var(--line-2);
    color: var(--ink-2);
    font-weight: 600;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
    transition: border-color var(--t), color var(--t), background var(--t);
}

.btn-ghost:hover { border-color: var(--line-accent); color: var(--accent); background: var(--accent-softer); }

.btn-sm { padding: 9px 18px; font-size: 13px; }
.btn-lg { padding: 16px 32px; font-size: 15px; }

/* ---------- 7. Навигация ---------- */
.nav-blur {
    background: rgba(10, 10, 15, .78);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
}

nav.is-scrolled {
    background: rgba(10, 10, 15, .93);
    box-shadow: 0 12px 34px rgba(0, 0, 0, .45);
}

/* якорные секции не должны уезжать под липкую шапку */
section[id], [id] { scroll-margin-top: 132px; }

.brand-mark {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), var(--accent-dim));
    color: #140d02;
    clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 11px 100%, 0 calc(100% - 11px));
    flex-shrink: 0;
}

.brand-name {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -.03em;
}

.nav-link {
    position: relative;
    padding: 6px 0;
    color: var(--dim);
    transition: color var(--t);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width var(--t);
}

.nav-link:hover { color: var(--ink); }
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }
.nav-link.is-active { color: var(--accent); }

/* ---------- 8. Сигнальная строка (ticker) ---------- */
.ticker {
    position: sticky;
    top: 0;
    z-index: 60;
    height: 36px;
    display: flex;
    align-items: center;
    background: var(--bg-deep);
    border-bottom: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
    overflow: hidden;
    white-space: nowrap;
}

.ticker-track {
    display: inline-flex;
    gap: 54px;
    padding: 9px 0;
    animation: ticker 38s linear infinite;
}

.ticker-track span { display: inline-flex; align-items: center; gap: 9px; }
.ticker-track span::before { content: '◆'; color: var(--accent); font-size: 8px; }

@keyframes ticker {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ---------- 9. Секции ---------- */
.section-head {
    position: relative;
    padding-left: 18px;
    margin-bottom: 30px;
    border-left: 2px solid var(--accent);
}

.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.section-head p { color: var(--dim); margin-top: 8px; max-width: 62ch; }

/* ---------- 10. Шаги (таймлайн) ---------- */
.step-list { position: relative; display: flex; flex-direction: column; gap: 18px; }

.step-list::before {
    content: '';
    position: absolute;
    left: 27px;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: linear-gradient(180deg, var(--accent), rgba(255, 140, 0, .05));
}

.step {
    position: relative;
    display: flex;
    gap: 22px;
    padding: 24px 26px;
    background: linear-gradient(160deg, rgba(26, 26, 37, .85), rgba(10, 10, 15, .92));
    border: 1px solid var(--line);
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
    transition: border-color var(--t), transform var(--t);
}

.step:hover { border-color: var(--line-accent); transform: translateX(4px); }

.step-num {
    flex-shrink: 0;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 17px;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid var(--line-accent);
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.step h3 { font-size: 1.15rem; margin-bottom: 8px; }
.step p { color: var(--dim); font-size: 14.5px; }

/* ---------- 11. Метрики ---------- */
.stat-tile {
    padding: 26px 24px;
    background: linear-gradient(160deg, rgba(26, 26, 37, .9), rgba(8, 8, 12, .95));
    border: 1px solid var(--line);
    clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 13px 100%, 0 calc(100% - 13px));
    transition: border-color var(--t), transform var(--t);
}

.stat-tile:hover { border-color: var(--line-accent); transform: translateY(-3px); }

.stat-tile b {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 3vw, 2.4rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 9px;
    letter-spacing: -.03em;
}

.stat-tile span {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .15em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ---------- 12. FAQ ---------- */
.faq-item {
    border: 1px solid var(--line);
    background: rgba(18, 18, 26, .5);
    margin-bottom: 12px;
    transition: border-color var(--t);
}

.faq-item:hover { border-color: var(--line-accent); }

.faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 19px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 15px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-family: var(--font-mono);
    font-size: 20px;
    color: var(--accent);
    flex-shrink: 0;
    transition: transform var(--t);
}

.faq-item[open] summary::after { content: '−'; }

.faq-item[open] { border-color: var(--line-accent); }

.faq-body {
    padding: 0 22px 20px;
    color: var(--dim);
    font-size: 14.5px;
}

/* ---------- 13. Отзывы ---------- */
.review-card {
    position: relative;
    padding: 24px;
    background: linear-gradient(160deg, rgba(26, 26, 37, .88), rgba(9, 9, 13, .95));
    border: 1px solid var(--line);
    clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 13px 100%, 0 calc(100% - 13px));
    transition: border-color var(--t), transform var(--t);
}

.review-card:hover { border-color: var(--line-accent); transform: translateY(-4px); }

.review-card::before {
    content: '”';
    position: absolute;
    font-family: var(--font-display);
    font-size: 54px;
    line-height: 1;
    color: rgba(255, 140, 0, .22);
}

.stars { color: var(--accent); letter-spacing: 2px; font-size: 13px; }

/* ---------- 14. Подвал ---------- */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--line);
    position: relative;
}

.footer-bottom {
    margin-top: 42px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .04em;
    color: var(--muted);
}

.footer-bottom a { color: var(--dim); transition: color var(--t); }
.footer-bottom a:hover { color: var(--accent); }

.site-footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    width: 220px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.footer-title {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

/* ---------- 15. Анимации ---------- */
.fade-in { animation: fadeIn .7s cubic-bezier(.2, .7, .3, 1) both; }
.fade-in-delay-1 { animation-delay: .1s; }
.fade-in-delay-2 { animation-delay: .2s; }
.fade-in-delay-3 { animation-delay: .3s; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.text-glow { text-shadow: 0 0 34px rgba(255, 140, 0, .35); }

.card-hover { transition: transform var(--t), box-shadow var(--t), border-color var(--t); }
.card-hover:hover { transform: translateY(-5px); box-shadow: var(--shadow); }

/* скролл-ревил (main.js) — без конфликта с анимациями */
[data-reveal] { will-change: transform, opacity; }

/* ---------- 16. Таблица сравнения (goods) ---------- */
.comparison-table { width: 100%; border-collapse: collapse; }

.comparison-table th,
.comparison-table td {
    border: 1px solid var(--line);
    padding: 14px 16px;
    font-size: 14px;
    text-align: left;
}

.comparison-table thead th {
    background: rgba(255, 140, 0, .08);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    letter-spacing: .01em;
    color: var(--accent);
}

.comparison-table tbody tr:hover { background: rgba(255, 140, 0, .045); }

/* ---------- 17. Мобильные карточки ---------- */
.mobile-cards { display: grid; gap: 12px; }

.mobile-card {
    display: flex;
    gap: 14px;
    align-items: center;
    padding: 14px;
    border: 1px solid var(--line);
    background: rgba(18, 18, 26, .55);
}

.mobile-card b { font-family: var(--font-display); font-size: 14px; display: block; }

/* ---------- 17. Команда, рейтинг, оглавление ---------- */
.team-card {
    position: relative;
    padding: 30px 26px;
    text-align: center;
    background: linear-gradient(160deg, rgba(26, 26, 37, .88), rgba(9, 9, 13, .95));
    border: 1px solid var(--line);
    clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
    transition: border-color var(--t), transform var(--t);
}

.team-card:hover { border-color: var(--line-accent); transform: translateY(-4px); }

.avatar {
    width: 92px;
    height: 92px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid var(--line-accent);
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.team-role {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 14px;
}

/* распределение оценок */
.rating-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
}

.rating-bar .track {
    flex: 1;
    height: 7px;
    background: var(--surface-2);
    overflow: hidden;
}

.rating-bar .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-dim), var(--accent));
}

.rating-bar b { color: var(--ink-2); font-weight: 500; width: 54px; }

/* метаданные отзыва */
.review-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.review-avatar {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid var(--line-accent);
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

/* оглавление документа */
.toc-item {
    display: flex;
    align-items: baseline;
    gap: 14px;
    padding: 11px 0;
    border-bottom: 1px solid var(--line);
    color: var(--dim);
    font-size: 14px;
    transition: color var(--t);
}

.toc-item:hover { color: var(--accent); }
.toc-item i { font-family: var(--font-mono); font-style: normal; font-size: 11.5px; color: var(--accent); letter-spacing: .1em; }

/* ---------- 18. Каталог (goods) ---------- */
.chip {
    padding: 9px 18px;
    border: 1px solid var(--line-2);
    color: var(--dim);
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
    transition: color var(--t), border-color var(--t), background var(--t);
}

.chip:hover { color: var(--accent); border-color: var(--line-accent); }

.chip.active {
    background: var(--accent);
    color: #140d02;
    border-color: var(--accent);
    font-weight: 700;
}

.product-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.pc-tag {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 2;
    background: rgba(10, 10, 15, .85);
    border: 1px solid var(--line-accent);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    padding: 4px 9px;
}

.pc-media {
    height: 190px;
    background: linear-gradient(160deg, var(--surface-2), var(--bg-deep));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    border-bottom: 1px solid var(--line);
    position: relative;
    overflow: hidden;
}

.pc-media::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 35%, rgba(255, 140, 0, .13), transparent 62%);
}

.pc-icon {
    width: 62px;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    border: 1px solid var(--line-accent);
    color: var(--accent);
    clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 13px 100%, 0 calc(100% - 13px));
    position: relative;
}

.pc-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.pc-title { font-size: 17px; font-weight: 600; margin-bottom: 8px; letter-spacing: -.02em; }
.pc-desc { font-size: 13.5px; color: var(--dim); line-height: 1.6; margin-bottom: 16px; }

.pc-seller {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 16px;
}

.pc-avatar {
    width: 26px;
    height: 26px;
    background: var(--surface-2);
    border: 1px solid var(--line-2);
    flex-shrink: 0;
}

.pc-stars { color: var(--accent); letter-spacing: 1px; }

.pc-foot {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
}

.pc-foot b {
    display: block;
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 700;
    color: var(--accent);
    margin-top: 4px;
}

.page-btn {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--line-2);
    color: var(--dim);
    font-family: var(--font-mono);
    transition: color var(--t), border-color var(--t), background var(--t);
}

.page-btn:hover { color: var(--accent); border-color: var(--line-accent); }
.page-btn.active { background: var(--accent); color: #140d02; border-color: var(--accent); font-weight: 700; }

/* ---------- 19. Адаптив ---------- */
@media (max-width: 1024px) {
    .step-list::before { left: 22px; }
    .step { padding: 20px; gap: 16px; }
    .step-num { width: 44px; height: 44px; font-size: 15px; }
}

@media (max-width: 640px) {
    body { font-size: 15px; }
    .section-head { padding-left: 14px; }
    .step { flex-direction: column; }
    .step-list::before { display: none; }
}