/* «Як це влаштовано» — a calm article */
html { scroll-snap-type: none; }
html, body { overflow-x: clip; }
.article { max-width: 700px; margin: 0 auto; padding: 120px 24px 40px; }
.article .top { padding-bottom: 36px; border-bottom: 1px solid var(--line); position: relative; }
.article .top::before { content: ""; position: absolute; left: -10%; top: -40%; width: 460px; height: 460px; border-radius: 50%; background: var(--glow-bg); z-index: -1; }
.article .n { font-size: 13px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.article h1 { font-family: var(--serif); font-weight: 600; font-size: clamp(44px, 7vw, 76px); line-height: 1; letter-spacing: -.02em; margin-top: 10px; }
.article .lead { font-size: 20px; line-height: 1.55; color: var(--ink-2); margin-top: 18px; }
.article section { padding: 40px 0; border-bottom: 1px solid var(--line); }
.article h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(28px, 4vw, 38px); line-height: 1.1; display: flex; gap: 14px; align-items: baseline; }
.article h2 span { font-family: var(--sans); font-size: 14px; font-weight: 600; color: var(--accent); min-width: 14px; }
.article p { font-size: 18px; line-height: 1.65; color: var(--ink-2); margin-top: 14px; }
.article p b, .article li b { color: var(--ink); font-weight: 600; }
.article a:not(.btn) { color: var(--accent); }
.article .note { font-size: 15px; color: var(--ink-3); border-left: 2px solid var(--line); padding-left: 14px; }
.kel { display: flex; align-items: center; gap: 0; margin-top: 24px; overflow-x: auto; padding-bottom: 6px; }
.kel div { flex: none; padding: 12px 14px; border-radius: 12px; box-shadow: inset 0 0 0 1px var(--ghost); background: var(--bg); min-width: 116px; }
.kel b { display: block; font-size: 14px; }
.kel small { color: var(--ink-3); font-size: 12.5px; }
.kel i { flex: none; width: 22px; height: 1px; background: var(--ghost); position: relative; }
.kel i::after { content: ""; position: absolute; right: -1px; top: -3px; border: 3.5px solid transparent; border-left-color: var(--ghost); }
.packet { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; font-size: 15px; }
.packet span { padding: 8px 14px; border-radius: 10px; box-shadow: inset 0 0 0 1px var(--ghost); }
.packet span.ok { background: #E3F2EA; color: #24603F; box-shadow: none; font-weight: 600; }
:root[data-theme="dark"] .packet span.ok { background: #1E3A2C; color: #9FE0BC; }
.packet i { font-style: normal; color: var(--ink-3); }
.facts { list-style: none; padding: 0; margin: 16px 0 0; }
.facts li { font-size: 18px; line-height: 1.6; color: var(--ink-2); padding: 10px 0; border-top: 1px solid var(--line); }
.facts li:first-child { border-top: 0; }
.article .back { display: flex; gap: 12px; flex-wrap: wrap; padding: 48px 0 8px; }
.more { min-height: auto; padding-top: 56px; }
@media (max-width: 600px) { .kel { flex-wrap: wrap; row-gap: 10px; overflow: visible; } .kel div { min-width: 0; } }

.cmp { margin-top: 18px; font-size: 15.5px; }
.cmp > div { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 10px; padding: 11px 0; border-top: 1px solid var(--line); align-items: baseline; }
.cmp > div.h { border-top: 0; font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.cmp span { color: var(--ink-2); }
.cmp span[role="rowheader"] { color: var(--ink-3); }
.cmp .us { color: var(--ink); font-weight: 600; }
.cmp .h .us { color: var(--accent); }
@media (max-width: 600px) { .cmp { font-size: 14px; } .cmp > div { grid-template-columns: 1.2fr .9fr .9fr 1fr; gap: 6px; } }
.facts li b { font-family: var(--serif); font-size: 22px; }
.facts li b { font-family: var(--sans); font-size: inherit; }
.facts.small li { font-size: 16px; }
.steps { margin: 12px 0 0; padding-left: 0; list-style: none; counter-reset: s; }
.steps li { counter-increment: s; position: relative; padding: 8px 0 8px 40px; font-size: 17px; line-height: 1.55; color: var(--ink-2); }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 8px; width: 26px; height: 26px; border-radius: 50%; box-shadow: inset 0 0 0 1px var(--ghost); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; color: var(--ink); }
.cmp > div { grid-template-columns: 1.3fr 1fr 1fr 1.2fr; }

/* v3 — hands-on labs */
.lab { margin-top: 22px; padding: 20px; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--ghost); background: var(--bg); }
.lab-h { font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.lab-h small { letter-spacing: 0; text-transform: none; font-weight: 400; color: var(--ink-3); margin-left: 8px; font-size: 13px; }
.lab .l { display: block; font-size: 13px; color: var(--ink-3); margin-top: 14px; }
.lab textarea { width: 100%; margin-top: 6px; font: italic 22px/1.35 var(--serif); color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid var(--ghost); padding: 6px 0; resize: none; outline: none; }
.lab textarea:focus { border-bottom-color: var(--accent); }
.row2 { display: flex; gap: 12px; align-items: baseline; margin-top: 12px; font-size: 13px; }
.row2 .k { color: var(--ink-3); flex: none; }
.row2 code { font: 12.5px/1.4 ui-monospace, Menlo, monospace; color: var(--ink-2); word-break: break-all; }
.verdict { margin-top: 14px; padding: 10px 14px; border-radius: 10px; font-size: 15px; font-weight: 600; background: #E3F2EA; color: #24603F; transition: background .3s, color .3s; }
.verdict.bad { background: #F7E3E3; color: #8B2635; }
.verdict.warn { background: #F6EDD9; color: #7A5A17; }
:root[data-theme="dark"] .verdict { background: #1E3A2C; color: #9FE0BC; }
:root[data-theme="dark"] .verdict.bad { background: #3A1E24; color: #F0A9B4; }
:root[data-theme="dark"] .verdict.warn { background: #3A321E; color: #F0D39A; }
.lab .hint { font-size: 14px; color: var(--ink-3); margin-top: 10px; }

.chain { display: grid; gap: 0; margin-top: 14px; }
.ev { position: relative; padding: 12px 14px; border-radius: 12px; box-shadow: inset 0 0 0 1px var(--ghost); transition: box-shadow .3s, opacity .3s; }
.ev + .ev { margin-top: 22px; }
.ev + .ev::before { content: ""; position: absolute; left: 28px; top: -22px; height: 22px; width: 2px; background: var(--ghost); transition: background .3s; }
.ev.broken { box-shadow: inset 0 0 0 1.5px #C24C5C; }
.ev.broken::before { background: repeating-linear-gradient(#C24C5C 0 4px, transparent 4px 8px); }
.ev .t { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.ev input { display: block; width: 100%; font: 17px/1.4 var(--sans); color: var(--ink); background: transparent; border: 0; padding: 4px 0; outline: none; border-bottom: 1px dashed transparent; }
.ev input:hover, .ev input:focus { border-bottom-color: var(--ghost); }
.ev .h { display: flex; flex-wrap: wrap; gap: 4px 16px; font: 12px/1.4 ui-monospace, Menlo, monospace; color: var(--ink-3); margin-top: 4px; }
.ev .h b { font-weight: 600; color: var(--ink-2); }
.ev.broken .h .p b { color: #C24C5C; }

.keys2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.kk { padding: 16px; border-radius: 12px; box-shadow: inset 0 0 0 1px var(--ghost); transition: all .4s; }
.kk b { display: block; font-family: var(--serif); font-size: 24px; }
.kk small { color: var(--ink-3); font-size: 13.5px; }
.kk.env { background: repeating-linear-gradient(135deg, transparent 0 8px, var(--line) 8px 9px); }
.kk.stolen { box-shadow: inset 0 0 0 1.5px #C27A2C; }
.kk.dead { opacity: .45; } .kk.dead b { text-decoration: line-through; }
.kk.live { background: none; box-shadow: inset 0 0 0 1.5px var(--accent); }
.btns2 { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.b { font: 600 15px var(--sans); padding: 10px 16px; border-radius: 999px; border: 0; cursor: pointer; background: var(--ink); color: var(--bg); }
.b.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px var(--ghost); }
.b:disabled { opacity: .35; cursor: default; }

.fork { margin-top: 20px; display: grid; grid-template-columns: auto 1fr; gap: 10px 14px; align-items: center; }
.fork span { display: inline-flex; width: 34px; height: 34px; border-radius: 50%; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; box-shadow: inset 0 0 0 1px var(--ghost); background: var(--bg); }
.fk { display: flex; gap: 8px; }
.fb { display: grid; gap: 8px; }
.br { display: flex; gap: 10px; align-items: center; font-size: 13.5px; color: var(--ink-3); }
.br .a { box-shadow: inset 0 0 0 1.5px #3F7F5E; } .br .x { box-shadow: inset 0 0 0 1.5px #C24C5C; }
.fw { grid-column: 1 / -1; font-size: 15px; color: var(--ink-2); padding-top: 4px; }
.fw b { color: #8B2635; } :root[data-theme="dark"] .fw b { color: #F0A9B4; }

.vs2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.vs2 > div { padding: 16px; border-radius: 14px; box-shadow: inset 0 0 0 1px var(--ghost); }
.vs2 h3 { font-family: var(--serif); font-size: 24px; font-weight: 600; }
.vs2 > div:last-child h3 { color: var(--accent); }
.vs2 p { font-size: 15px !important; margin-top: 10px !important; }
.led { display: grid; grid-template-columns: repeat(12, 1fr); gap: 3px; margin-top: 10px; }
.led i { height: 22px; border-radius: 3px; background: var(--ghost); animation: led 2.4s infinite; }
.led i:nth-child(odd) { animation-delay: .6s; }
@keyframes led { 50% { opacity: .4; } }
.own { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; height: 22px; align-items: center; }
.own span { display: flex; gap: 2px; }
.own i { width: 10px; height: 10px; border-radius: 2px; background: var(--accent); opacity: .75; }

.see { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 18px; }
.see h3 { font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }
.see ul { margin: 8px 0 0; padding-left: 18px; }
.see li { font-size: 16px; line-height: 1.5; color: var(--ink-2); margin-top: 6px; }
.article section.last { border-bottom: 0; padding-top: 56px; }
.article .last h2 { font-size: clamp(32px, 5vw, 46px); }
.article .last .btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
@media (max-width: 600px) { .keys2, .vs2, .see { grid-template-columns: 1fr; } .lab { padding: 16px; } .article .lead { font-size: 18px; } }