/* zaia.cz homepage. Light only. Logical properties (inline/block) keep the Arabic page mirrored for free. */
:root {
  --paper: #f5f6fb;
  --card: #ffffff;
  --ink: #17133b;
  --muted: #5e5a78;
  --line: #dcdcea;
  --violet: #4a2fe0;
  --violet-deep: #33209f;
  --violet-soft: #ecebff;
  --marker: #ffe45c;
  --mint: #0b7d61;
  --body: 'Onest', system-ui, sans-serif;
  --display: 'Unbounded', 'Onest', system-ui, sans-serif;
  --r: 14px;
  color-scheme: light;
}
/* Scripts Unbounded does not cover use their own family for everything. */
[data-font="ar"] { --body: 'IBM Plex Sans Arabic', system-ui, sans-serif; --display: var(--body); }
[data-font="zh"] { --body: 'Noto Sans SC', system-ui, sans-serif; --display: var(--body); }
[data-font="ja"] { --body: 'Noto Sans JP', system-ui, sans-serif; --display: var(--body); }
[data-font="ko"] { --body: 'Noto Sans KR', system-ui, sans-serif; --display: var(--body); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.6 var(--body); -webkit-font-smoothing: antialiased; }
a { color: var(--violet); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--violet); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { font-family: var(--display); font-weight: 600; letter-spacing: -0.02em; margin: 0; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); line-height: 1.15; max-width: 22ch; }
h3 { font-size: 1.05rem; line-height: 1.3; }
[data-font="ar"] h1, [data-font="ar"] h2, [data-font="ar"] h3,
[data-font="zh"] h1, [data-font="zh"] h2, [data-font="ja"] h1, [data-font="ja"] h2, [data-font="ko"] h1, [data-font="ko"] h2 { letter-spacing: 0; font-weight: 700; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; inset-inline-start: -9999px; }
.skip:focus { inset-inline-start: 16px; top: 16px; z-index: 10; background: var(--card); padding: 8px 12px; }

/* Brand: the question mark is the product's promise, so it is the logo. */
.brand { font: 600 1.35rem/1 var(--display); letter-spacing: -0.03em; color: var(--ink); text-decoration: none; display: inline-flex; align-items: baseline; direction: ltr; }
.brand i { font-style: normal; color: var(--paper); background: var(--violet); border-radius: 50%; width: 1.05em; height: 1.05em; display: inline-grid; place-items: center; font-size: 0.8em; margin-inline-start: 0.12em; transform: translateY(-0.05em); }

/* Buttons */
.btn { display: inline-block; white-space: nowrap; background: var(--violet); color: #fff; text-decoration: none; font-weight: 600; padding: 15px 26px; border-radius: 999px; transition: background .15s; }
.btn:hover { background: var(--violet-deep); }
.btn.small { padding: 9px 18px; font-size: .95rem; }
.ghost { color: var(--ink); font-weight: 600; text-decoration: none; padding: 15px 4px; border-bottom: 2px solid var(--marker); }
.ghost:hover { border-color: var(--violet); }
.note { color: var(--muted); font-size: .92rem; margin: 14px 0 0; }

/* Header */
.top { position: sticky; top: 0; z-index: 5; background: rgba(245, 246, 251, .92); backdrop-filter: blur(8px); border-bottom: 1px solid transparent; }
.top .wrap { display: flex; align-items: center; gap: 20px; height: 68px; }
.top nav { display: flex; gap: 22px; margin-inline-start: auto; }
.top nav a, .login { color: var(--ink); text-decoration: none; font-weight: 500; font-size: .95rem; }
.top nav a:hover, .login:hover { color: var(--violet); }

/* Language switcher: a native disclosure, no script needed. */
.lang { position: relative; }
.lang summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 6px; font-size: .95rem; font-weight: 500; padding: 6px 10px; border-radius: 999px; }
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover, .lang[open] summary { background: var(--violet-soft); }
.lang ul { position: absolute; inset-inline-end: 0; top: calc(100% + 8px); margin: 0; padding: 10px; list-style: none; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); box-shadow: 0 18px 40px -18px rgba(23, 19, 59, .35); display: grid; grid-template-columns: repeat(2, minmax(150px, 1fr)); gap: 2px; z-index: 6; }
.lang a { display: block; padding: 8px 12px; border-radius: 8px; color: var(--ink); text-decoration: none; }
.lang a:hover { background: var(--violet-soft); }
.lang a[aria-current] { background: var(--ink); color: #fff; }

/* Hero */
.hero { padding: 56px 0 88px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 500px); gap: 64px; align-items: center; }
h1 { font-size: clamp(1.9rem, 4.6vw, 3.6rem); line-height: 1.06; max-width: 15ch; hyphens: auto; overflow-wrap: break-word; }
h2 { hyphens: auto; overflow-wrap: break-word; }
[data-font="zh"] h1, [data-font="ja"] h1, [data-font="ko"] h1 { max-width: 13em; line-height: 1.25; }
.lead { font-size: 1.18rem; color: var(--muted); max-width: 34em; margin: 22px 0 32px; }
.ctas { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px; }

/* Demo: a real-looking conversation. The yellow "marker" shows how words became filters. */
.demo { background: var(--card); border-radius: 24px; padding: 18px; box-shadow: 0 1px 0 var(--line), 0 30px 60px -30px rgba(74, 47, 224, .35); }
.tabs { display: flex; gap: 4px; background: var(--paper); padding: 4px; border-radius: 999px; margin-bottom: 18px; width: fit-content; }
.tabs button { font: inherit; font-size: .9rem; font-weight: 500; border: 0; background: none; color: var(--muted); padding: 7px 16px; border-radius: 999px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--card); color: var(--ink); box-shadow: 0 1px 3px rgba(23, 19, 59, .12); }
.chat { display: flex; flex-direction: column; gap: 12px; min-height: 400px; }
.msg { margin: 0; max-width: 88%; padding: 12px 16px; border-radius: 18px; }
.msg p { margin: 0; }
.msg.you { align-self: flex-end; background: var(--ink); color: #fff; border-end-end-radius: 6px; }
.msg.bot { align-self: flex-start; background: var(--paper); border-end-start-radius: 6px; }
.msg.ask { background: var(--violet); color: #fff; }
.picks { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.picks button { font: inherit; font-size: .95rem; font-weight: 500; background: #fff; color: var(--violet-deep); border: 0; border-radius: 999px; padding: 8px 14px; cursor: pointer; }
.picks button:hover { background: var(--marker); color: var(--ink); }
.picks button[aria-pressed="true"] { background: var(--marker); color: var(--ink); }
.picks button:disabled:not([aria-pressed="true"]) { opacity: .55; cursor: default; }
.picks.waiting button { animation: nudge 1.6s ease-in-out 2; }
@keyframes nudge { 50% { box-shadow: 0 0 0 6px rgba(255, 228, 92, .55); } }
.result { display: flex; flex-direction: column; gap: 12px; }
.result[hidden], .chat[hidden] { display: none; }
.understood { align-self: stretch; font-size: .85rem; color: var(--muted); }
.understood span { display: block; margin-bottom: 6px; }
.understood ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 10px; }
.understood li { color: var(--ink); font-weight: 500; padding: 1px 6px; background: linear-gradient(transparent 28%, var(--marker) 28%, var(--marker) 88%, transparent 88%); }
.sources { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.sources li { background: var(--card); border-radius: 10px; padding: 8px 12px; display: flex; flex-direction: column; border-inline-start: 3px solid var(--mint); }
.sources span { font-weight: 600; font-size: .92rem; }
.sources small { color: var(--mint); font-size: .8rem; direction: ltr; text-align: start; }
.again { align-self: flex-start; font: inherit; font-size: .9rem; background: none; border: 0; color: var(--violet); cursor: pointer; padding: 4px 0; text-decoration: underline; text-underline-offset: 3px; }
.reveal { animation: rise .35s ease-out both; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

/* Steps are a real sequence, so they get numbers. */
.how { padding: 88px 0; background: var(--card); }
.how ol { list-style: none; counter-reset: s; margin: 44px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.how li { counter-increment: s; }
.how li::before { content: counter(s); display: block; font: 600 2.6rem/1 var(--display); color: var(--violet); margin-bottom: 18px; }
.how p, .why dd { color: var(--muted); margin: 8px 0 0; }

.why { padding: 88px 0; }
.why dl { margin: 44px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px 56px; }
.why dl div { border-inline-start: 3px solid var(--marker); padding-inline-start: 20px; }
.why dt { font: 600 1.1rem/1.3 var(--display); letter-spacing: -0.01em; }
.why dd { margin: 8px 0 0; max-width: 36em; }
[data-font="ar"] .why dt, [data-font="zh"] .why dt, [data-font="ja"] .why dt, [data-font="ko"] .why dt { letter-spacing: 0; font-weight: 700; }

/* Pricing: one row, plans separated by rules rather than boxed cards. */
.pricing { padding: 88px 0; background: var(--card); }
.pricing .lead { margin-bottom: 40px; }
.plans { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.plans li { padding: 28px 24px 28px 0; padding-inline: 0 24px; border-inline-end: 1px solid var(--line); }
.plans li + li { padding-inline-start: 24px; }
.plans li:last-child { border-inline-end: 0; }
.plans .popular { background: var(--violet-soft); border-radius: 0 0 var(--r) var(--r); }
.plans h3 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.plans em { font: 500 .78rem/1 var(--body); font-style: normal; background: var(--violet); color: #fff; padding: 5px 9px; border-radius: 999px; letter-spacing: 0; }
.price { margin: 18px 0 4px; }
.price strong { font: 600 2rem/1 var(--display); letter-spacing: -0.02em; }
.price span, .limit { color: var(--muted); font-size: .92rem; }
.limit { margin: 0; font-weight: 500; color: var(--ink); }
.fit { color: var(--muted); font-size: .95rem; margin: 12px 0 0; }
.plan-cta { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 0 24px; }
.plan-cta .note { margin: 0; }

.dev { padding: 72px 0; background: var(--ink); color: #fff; }
.dev .wrap { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: end; }
.dev p { color: #cfcde3; max-width: 38em; margin: 14px 0 0; }
.dev .links { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; }
.dev .links a { color: #fff; text-decoration: none; border: 1px solid rgba(255, 255, 255, .3); border-radius: 999px; padding: 9px 16px; font-weight: 500; }
.dev .links a:hover { border-color: var(--marker); color: var(--marker); }
.dev .note { color: #a9a6c6; }

.faq { padding: 88px 0; }
.faq h2 { margin-bottom: 28px; }
.faq details { border-bottom: 1px solid var(--line); max-width: 760px; }
.faq summary { cursor: pointer; list-style: none; padding: 20px 0; font-weight: 600; font-size: 1.08rem; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--violet); font: 500 1.4rem/1 var(--display); }
.faq details[open] summary::after { content: '\2212'; }
.faq details p { margin: 0 0 22px; color: var(--muted); max-width: 40em; }

.final { padding: 96px 0; background: var(--violet); color: #fff; }
.final h2 { max-width: 20ch; }
.final p { color: #dcd6ff; font-size: 1.15rem; margin: 16px 0 32px; }
.final .btn { background: #fff; color: var(--violet-deep); }
.final .btn:hover { background: var(--marker); color: var(--ink); }
.final .ghost { color: #fff; }

footer { padding: 40px 0 56px; font-size: .92rem; color: var(--muted); }
footer .by { margin: 0 0 18px; }
.langs { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; }
.langs a { color: var(--muted); text-decoration: none; }
.langs a:hover { color: var(--violet); }
.langs a[aria-current] { color: var(--ink); font-weight: 600; }

/* Root language picker, shown only without JavaScript. */
.picker main { padding: 15vh 24px; }
.picker .langs { margin-top: 32px; font-size: 1.1rem; gap: 12px 24px; }

@media (max-width: 960px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 44px; }
  .how ol { grid-template-columns: repeat(2, 1fr); }
  .plans { grid-template-columns: repeat(2, 1fr); }
  .plans li:nth-child(2) { border-inline-end: 0; }
  .plans li:nth-child(3) { padding-inline-start: 0; }
  .plans li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .plans .popular { padding-inline-start: 24px !important; }
  .dev .wrap { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .top .wrap { gap: 10px; height: 60px; }
  .top nav { display: none; }
  .lang { margin-inline-start: auto; }
  .lang summary span { display: none; }
  .lang ul { position: fixed; inset-inline: 12px; top: 64px; grid-template-columns: repeat(2, 1fr); }
  .login { display: none; }
  .btn.small { padding: 8px 12px; font-size: .88rem; }
  .ctas .btn { white-space: normal; }
  .hero { padding: 32px 0 64px; }
  .lead { font-size: 1.06rem; }
  .ctas .btn { width: 100%; text-align: center; }
  .demo { padding: 12px; border-radius: 20px; }
  .chat { min-height: 0; }
  .how, .why, .pricing, .faq { padding: 64px 0; }
  .how ol, .why dl { grid-template-columns: 1fr; gap: 28px; }
  .plans { grid-template-columns: 1fr; }
  .plans li, .plans li + li, .plans li:nth-child(3) { padding-inline: 0; border-inline-end: 0; border-top: 1px solid var(--line); }
  .plans .popular { padding-inline: 16px !important; border-radius: var(--r); }
  .final { padding: 72px 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .picks.waiting button { animation: none; }
}