:root {
  --bg: #fbfaf6;
  --bg-alt: #f1f4fa;
  --text: #1c2430;
  --muted: #566273;
  --accent: #2f6fde;
  --accent-soft: #e3ecfc;
  --ok: #1f9d55;
  --ok-soft: #e1f5e9;
  --bad: #d64545;
  --bad-soft: #fde8e8;
  --warn: #c27c0e;
  --card: #ffffff;
  --border: #e2e6ec;
  --shadow: 0 6px 24px rgba(20, 30, 50, .07);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #13171c;
    --bg-alt: #181e26;
    --text: #e8ecf1;
    --muted: #a3aebb;
    --accent: #7aa7ff;
    --accent-soft: #1f2d48;
    --ok: #4cc77f;
    --ok-soft: #173325;
    --bad: #ff7b7b;
    --bad-soft: #3a1d1f;
    --warn: #f0b44c;
    --card: #1d242d;
    --border: #2d3640;
    --shadow: 0 6px 24px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 18px;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
h1, h2, h3, h4 { line-height: 1.25; }

/* ---------- Nagłówek ---------- */
.hero {
  padding: 64px 0 40px;
  background:
    radial-gradient(circle at 85% 10%, var(--accent-soft), transparent 45%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.eyebrow { margin: 0 0 8px; color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; font-size: .8rem; }
.hero h1 { margin: 0 0 16px; font-size: clamp(1.9rem, 5vw, 2.8rem); }
.hero h1 span { color: var(--muted); font-weight: 600; }
.lead { margin: 0 0 24px; color: var(--muted); max-width: 60ch; }
.toc { display: flex; flex-wrap: wrap; gap: 12px; }
.toc a {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 16px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border);
  text-decoration: none; color: var(--text); font-weight: 600;
  box-shadow: var(--shadow); transition: transform .2s;
}
.toc a:hover { transform: translateY(-2px); }
.toc b { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: #fff; font-size: .85rem; }

/* ---------- Części ---------- */
.part { padding: 56px 0; }
.part-alt { background: var(--bg-alt); border-top: 1px solid var(--border); }
.part-no { margin: 0; color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; font-size: .85rem; }
.part h2 { margin: 4px 0 8px; font-size: clamp(1.5rem, 4vw, 2.1rem); }
.note { color: var(--muted); font-style: italic; margin: 0 0 24px; }
.prose p { margin: 0 0 16px; max-width: 68ch; }

.step-title { display: flex; align-items: center; gap: 12px; margin: 48px 0 12px; font-size: 1.3rem; }
.step-title span {
  flex: none; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: var(--accent); color: #fff; font-size: 1rem;
}

.infographic {
  margin: 24px 0 32px; padding: 24px;
  background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow);
}
.infographic figcaption { margin-top: 16px; color: var(--muted); font-size: .9rem; text-align: center; }

.aside {
  margin: 8px 0 24px; padding: 16px 20px; border-left: 4px solid var(--warn);
  background: var(--card); border-radius: 0 12px 12px 0; font-size: .97rem;
}

/* ---------- Kiedyś / dziś ---------- */
.then-now { display: grid; grid-template-columns: 1fr auto 3fr; gap: 16px; align-items: center; }
.col h3 { margin: 0 0 12px; font-size: 1rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.chips { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.chips li { padding: 10px 12px; border: 1px dashed var(--border); border-radius: 10px; color: var(--muted); font-size: .95rem; }
.ico { margin-right: 6px; }
.arrow svg { width: 70px; height: 24px; }
.arrow-line, .arrow-head { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.arrow-line { stroke-dasharray: 6 6; animation: dash 1s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -12; } }
.tiles { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.tile { display: flex; flex-direction: column; gap: 4px; padding: 12px; border-radius: 12px; background: var(--accent-soft); }
.tile svg { width: 100%; height: 64px; }
.tile b { font-size: .95rem; }
.tile small { color: var(--muted); font-size: .82rem; line-height: 1.4; }

.blk { fill: var(--accent); opacity: .25; animation: snap 3s ease-in-out infinite; }
.blk.b2 { fill: var(--ok); animation-delay: .4s; }
.blk.b3 { fill: var(--warn); animation-delay: .8s; }
@keyframes snap { 0%, 15% { opacity: .2; transform: translateX(-8px); } 35%, 85% { opacity: 1; transform: none; } 100% { opacity: .2; } }

.pixels .p { fill: var(--border); }
.pixels .p.on { fill: var(--bad); animation: pix 4s ease-in-out infinite both; }
@keyframes pix { 0% { opacity: 0; } 25%, 85% { opacity: 1; } 100% { opacity: 0; } }

.cloud-shape { fill: none; stroke: var(--accent); stroke-width: 3; }
.doc { fill: var(--accent); animation: up 2.6s ease-in-out infinite; }
@keyframes up { 0% { transform: translateY(14px); opacity: 0; } 40% { opacity: 1; } 80%, 100% { transform: translateY(-22px); opacity: 0; } }

.fold { fill: var(--warn); }
.branch { fill: none; stroke: var(--muted); stroke-width: 2; stroke-dasharray: 80; stroke-dashoffset: 80; animation: grow 3s ease-out infinite; }
.fold.f2, .fold.f3 { opacity: 0; animation: pop 3s ease-out infinite; }
.fold.f3 { animation-delay: .3s; }
@keyframes grow { 0% { stroke-dashoffset: 80; } 40%, 100% { stroke-dashoffset: 0; } }
@keyframes pop { 0%, 30% { opacity: 0; } 50%, 100% { opacity: 1; } }

/* ---------- Pomagamy tak samo ---------- */
.help-row { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; text-align: center; }
.help-row li { display: flex; flex-direction: column; align-items: center; gap: 8px; font-weight: 600; font-size: .95rem; }
.bubble {
  display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 800; font-size: 1.1rem;
}
.help-row .highlight .bubble { background: var(--accent); color: #fff; animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(47, 111, 222, .45); } 50% { box-shadow: 0 0 0 12px rgba(47, 111, 222, 0); } }

.tips { margin: 8px 0 32px; padding: 20px 24px; border-radius: 16px; background: var(--ok-soft); }
.tips h3 { margin: 0 0 8px; }
.tips ul { margin: 0; padding-left: 20px; }
.tips li { margin: 8px 0; }

.quote {
  margin: 0; padding: 28px 28px 24px 56px; border-radius: 16px; position: relative;
  background: var(--card); border: 1px solid var(--border); font-size: 1.15rem; font-style: italic;
}
.quote::before { content: "„"; position: absolute; top: -26px; left: 16px; font-size: 4rem; color: var(--accent); line-height: 1; }
.quote p { margin: 0; }

/* ---------- http / https ---------- */
.transport { width: 100%; height: auto; display: block; }
.transport .lbl { font: 700 16px system-ui, sans-serif; fill: var(--bad); }
.transport .lbl.ok { fill: var(--ok); }
.transport .node rect { fill: var(--accent-soft); stroke: var(--border); }
.transport .node text, .transport .emo { font-size: 26px; text-anchor: middle; dominant-baseline: middle; }
.transport .emo { text-anchor: start; }
.transport .lane { stroke: var(--border); stroke-width: 3; stroke-dasharray: 8 6; fill: none; }
.transport .tiny { font: 600 11px system-ui, sans-serif; fill: var(--muted); text-anchor: middle; }
.transport text.tiny:not(.dark) { text-anchor: start; }
.transport .tiny.dark { fill: #3b2a00; }
.transport .tiny.warn { fill: var(--bad); }
.postcard { fill: #ffe9a8; stroke: #d4a72c; }
.envelope { fill: var(--ok); }
.flap { fill: none; stroke: #fff; stroke-width: 2; }
.traveler { animation: travel 5s linear infinite; }
.t1 { --y: 68px; }
.t2 { --y: 178px; animation-delay: -2.5s; }
@keyframes travel {
  0% { transform: translate(90px, var(--y)); opacity: 0; }
  8% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translate(490px, var(--y)); opacity: 0; }
}

/* ---------- Certyfikat ---------- */
.cert-card {
  position: relative; max-width: 420px; margin: 0 auto; padding: 20px 24px;
  border: 2px solid var(--accent); border-radius: 14px;
  background: repeating-linear-gradient(135deg, transparent 0 12px, var(--accent-soft) 12px 13px), var(--card);
}
.cert-head { font-weight: 800; font-size: 1.2rem; margin-bottom: 12px; }
.lock-anim { display: inline-block; animation: lock 3s ease-in-out infinite; }
@keyframes lock { 0%, 60%, 100% { transform: none; } 70% { transform: rotate(-12deg); } 80% { transform: rotate(10deg); } 90% { transform: rotate(-4deg); } }
.cert-card dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; font-size: .95rem; }
.cert-card dt { color: var(--muted); }
.cert-card dd { margin: 0; font-weight: 600; }
.stamp {
  position: absolute; right: 16px; bottom: -18px; width: 72px; height: 72px; border-radius: 50%;
  display: grid; place-items: center; text-align: center; font-size: .65rem; font-weight: 800; line-height: 1.2;
  color: var(--bad); border: 3px double var(--bad); background: var(--card); transform: rotate(-14deg);
}
.reveal.in .stamp { animation: stamp .6s .5s cubic-bezier(.3, 1.6, .5, 1) both; }
@keyframes stamp { from { transform: scale(2.2) rotate(-14deg); opacity: 0; } to { transform: scale(1) rotate(-14deg); opacity: 1; } }

/* ---------- Kroki DV ---------- */
.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; position: relative; }
.flow li {
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 4px;
  padding: 12px 8px; border-radius: 12px; background: var(--bg-alt);
  opacity: 0; transform: translateY(12px);
}
.reveal.in .flow li { animation: rise .5s ease-out forwards; }
.reveal.in .flow li:nth-child(2) { animation-delay: .35s; }
.reveal.in .flow li:nth-child(3) { animation-delay: .7s; }
.reveal.in .flow li:nth-child(4) { animation-delay: 1.05s; }
@keyframes rise { to { opacity: 1; transform: none; } }
.flow .dot { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 800; }
.flow .done { background: var(--ok-soft); }
.flow .done .dot { background: var(--ok); }
.flow small { color: var(--muted); font-size: .82rem; line-height: 1.35; }
.not-checked { margin-top: 16px; padding: 12px 16px; border-radius: 12px; background: var(--bad-soft); display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: .95rem; }
.not-checked b { width: 100%; }
.not-checked span { color: var(--bad); font-weight: 600; }

/* ---------- Analogia ---------- */
.analogy { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center; }
.side { display: flex; flex-direction: column; align-items: center; text-align: center; }
.who { display: flex; flex-direction: column; align-items: center; gap: 6px; font-weight: 700; }
.avatar { display: grid; place-items: center; width: 72px; height: 72px; border-radius: 50%; background: var(--accent-soft); font-size: 2rem; }
.link-line { width: 3px; height: 28px; background: linear-gradient(var(--accent) 50%, transparent 50%) 0 0 / 3px 8px; animation: flowdown 1s linear infinite; }
@keyframes flowdown { to { background-position: 0 8px; } }
.says { padding: 10px 14px; border-radius: 12px; background: var(--bg-alt); font-style: italic; font-size: .95rem; }
.result { padding: 8px 14px; border-radius: 999px; background: var(--ok-soft); font-size: .92rem; }
.equals { font-size: 3rem; font-weight: 800; color: var(--accent); animation: breathe 2.4s ease-in-out infinite; }
@keyframes breathe { 50% { transform: scale(1.2); } }

/* ---------- Dwie przeglądarki ---------- */
.two-browsers { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.browser { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--bg); }
.bar { padding: 8px 12px; background: var(--bg-alt); border-bottom: 1px solid var(--border); font-size: .85rem; color: var(--muted); font-family: ui-monospace, monospace; }
.pad.bad { color: var(--bad); animation: blink 1.4s steps(2, start) infinite; }
@keyframes blink { to { visibility: hidden; } }
.screen { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 20px 12px; text-align: center; }
.screen small { color: var(--muted); font-size: .85rem; }
.screen .big { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; color: #fff; font-weight: 800; font-size: 1.6rem; margin-top: 8px; }
.ok-screen .big { background: var(--ok); }
.bad-screen { background: var(--bad-soft); }
.bad-screen .big { background: var(--bad); }

/* ---------- Kłódka: tak / nie ---------- */
.checklist { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.checklist > div { padding: 16px 20px; border-radius: 12px; }
.checklist h4 { margin: 0 0 8px; }
.checklist ul { margin: 0; padding: 0; list-style: none; }
.checklist li { padding: 6px 0 6px 28px; position: relative; font-size: .95rem; }
.yes { background: var(--ok-soft); }
.no { background: var(--bad-soft); }
.yes li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 800; }
.no li::before { content: "✗"; position: absolute; left: 0; color: var(--bad); font-weight: 800; }

/* ---------- Nawyki ---------- */
.habits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 16px 0 24px; }
.habit { display: flex; flex-direction: column; gap: 4px; padding: 16px; border-radius: 14px; background: var(--card); border: 1px solid var(--border); transition: transform .2s; }
.habit:hover { transform: translateY(-3px); }
.habit span { font-size: 1.6rem; }
.habit small { color: var(--muted); font-size: .85rem; line-height: 1.4; }

/* ---------- Stopka ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0; color: var(--muted); font-size: .92rem; }
.site-footer p { margin: 0 0 8px; max-width: 68ch; }
.small { font-size: .8rem; }

/* ---------- Pojawianie się przy przewijaniu ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Telefon ---------- */
@media (max-width: 680px) {
  body { font-size: 17px; }
  .then-now { grid-template-columns: 1fr; }
  .arrow { justify-self: center; transform: rotate(90deg); }
  .help-row { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .analogy { grid-template-columns: 1fr; }
  .equals { text-align: center; }
  .two-browsers, .checklist { grid-template-columns: 1fr; }
  .habits { grid-template-columns: 1fr 1fr; }
  .infographic { padding: 16px; }
}
@media (max-width: 420px) {
  .tiles, .habits { grid-template-columns: 1fr; }
}

/* ---------- Ograniczenie ruchu ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal, .flow li { opacity: 1 !important; transform: none !important; }
  .pixels .p.on, .fold.f2, .fold.f3 { opacity: 1; }
  .branch { stroke-dashoffset: 0; }
  .traveler.t1 { transform: translate(250px, 68px); }
  .traveler.t2 { transform: translate(250px, 178px); }
}

/* ---------- Rozmowa z AI ---------- */
.chat-window { max-width: 720px; margin: 0 auto; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: var(--bg-alt); }
.chat-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; background: var(--card); border-bottom: 1px solid var(--border); font-size: .85rem; font-weight: 600; color: var(--muted); }
.chat-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.chat-bar span { margin-left: 8px; }
.chat-body { display: flex; flex-direction: column; gap: 12px; padding: 18px; }
.chat-tag { align-self: center; padding: 4px 12px; border-radius: 999px; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.bad-tag { background: var(--bad-soft); color: var(--bad); }
.ok-tag { background: var(--ok-soft); color: var(--ok); margin-top: 12px; }
.msg { max-width: 86%; padding: 10px 14px; border-radius: 16px; font-size: .9rem; line-height: 1.5; opacity: 0; transform: translateY(8px); }
.msg p { margin: 0 0 6px; }
.msg ul { margin: 0 0 8px; padding-left: 18px; }
.msg li { margin: 2px 0; }
.msg code { font-size: .82rem; padding: 1px 4px; border-radius: 4px; background: var(--bg-alt); }
.msg.me { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.msg.ai { align-self: flex-start; background: var(--card); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg.ai::before { content: "AI"; display: block; font-size: .7rem; font-weight: 800; color: var(--muted); margin-bottom: 4px; }
.bad-msg { border-left: 4px solid var(--bad) !important; }
.ok-msg { border-left: 4px solid var(--ok) !important; }
.reveal.in .msg { animation: rise .45s ease-out forwards; animation-delay: var(--d, 0s); }
@media (max-width: 680px) { .msg { max-width: 100%; } .chat-body { padding: 12px; } }
@media (prefers-reduced-motion: reduce) { .msg { opacity: 1 !important; transform: none !important; } }
@media (prefers-color-scheme: dark) { .msg.me { color: #0b1a33; } }

/* ---------- Logowanie przez Microsoft ---------- */
.login-flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.lf-step {
  position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 4px;
  padding: 14px 8px; border-radius: 12px; background: var(--bg-alt); opacity: 0; transform: translateY(12px);
}
.lf-step small { color: var(--muted); font-size: .82rem; line-height: 1.35; }
.lf-step code { font-size: .72rem; }
.lf-ico { font-size: 1.8rem; }
.warn-step { background: var(--bad-soft); }
.ok-step { background: var(--ok-soft); outline: 2px solid var(--ok); }
.lf-step:not(:last-child)::after {
  content: "→"; position: absolute; right: -11px; top: 50%; transform: translateY(-50%);
  color: var(--accent); font-weight: 800; z-index: 1;
}
.reveal.in .lf-step { animation: rise .5s ease-out forwards; }
.reveal.in .lf-step:nth-child(2) { animation-delay: .35s; }
.reveal.in .lf-step:nth-child(3) { animation-delay: .7s; }
.reveal.in .lf-step:nth-child(4) { animation-delay: 1.05s; }
.pw-note { margin-top: 16px; padding: 12px 16px; border-radius: 12px; background: var(--ok-soft); font-weight: 600; text-align: center; }
.pw-note span { display: inline-block; animation: lock 3s ease-in-out infinite; }
.prose code { font-size: .88em; padding: 1px 5px; border-radius: 4px; background: var(--accent-soft); }
@media (max-width: 680px) {
  .login-flow { grid-template-columns: 1fr; gap: 22px; }
  .lf-step:not(:last-child)::after { content: "↓"; right: auto; left: 50%; top: auto; bottom: -16px; transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) { .lf-step { opacity: 1 !important; transform: none !important; } }