/* K43 Chatbot – julkinen esittelysivu. Ei inline-tyylejä (CSP: style-src 'self'). */
:root {
  --bg: #ffffff; --alt: #f4f6fa; --fg: #131722; --muted: #566072; --line: #e1e5ec;
  --primary: #1f5eff; --primary-dark: #1546c9; --primary-soft: #e8eeff; --ink: #0d1430;
  --radius: 12px; --shadow: 0 10px 30px rgba(16, 24, 48, .12), 0 2px 6px rgba(16, 24, 48, .06);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; font: 17px/1.6 var(--font); color: var(--fg); background: var(--bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); }
h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); text-align: center; }
h3 { font-size: 1.15rem; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
.wrap { width: min(1140px, 100% - 40px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: #fff; padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* Yläpalkki */
.top { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; color: var(--fg); text-decoration: none; }
.logo-mark { width: 34px; height: 34px; border-radius: 9px; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: .82rem; }
.top-nav { display: flex; gap: 22px; margin-left: auto; }
.top-nav a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 500; }
.top-nav a:hover { color: var(--fg); }
@media (max-width: 860px) { .top-nav { display: none; } .top-in .btn { margin-left: auto; } }

/* Painikkeet */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 11px 20px; border-radius: 10px; border: 1px solid var(--line); background: #fff; color: var(--fg); font-weight: 600; text-decoration: none; font-size: 1rem; line-height: 1.2; }
.btn:hover { border-color: #c5ccd8; background: var(--alt); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: 0 6px 16px rgba(31, 94, 255, .28); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-ghost { padding: 8px 16px; border-color: var(--primary); color: var(--primary); }
.btn-ghost:hover { background: var(--primary-soft); border-color: var(--primary); }
.btn-light { background: #fff; border-color: #fff; color: var(--ink); }
.btn-light:hover { background: #eef1f8; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* Hero */
.hero { background: linear-gradient(180deg, #eef3ff 0%, #ffffff 100%); overflow: hidden; }
.hero-in { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: center; padding-block: 72px 88px; }
.eyebrow { color: var(--primary); font-weight: 700; font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 14px; }
.lead { font-size: 1.2rem; color: var(--muted); margin: 20px 0 28px; max-width: 34em; }
.ticks { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 8px; color: var(--muted); font-size: .98rem; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .35em; width: 18px; height: 18px; border-radius: 50%; background: var(--primary-soft); }
.ticks li::after { content: ""; position: absolute; left: 6px; top: calc(.35em + 4px); width: 5px; height: 9px; border: solid var(--primary); border-width: 0 2px 2px 0; transform: rotate(45deg); }
.hero-art { position: relative; padding: 0 0 40px 0; }
.shot { border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); background: #fff; }
.shot-back { width: 100%; }
.shot-widget { position: absolute; right: -8px; bottom: -28px; width: min(44%, 300px); border-radius: 18px; filter: drop-shadow(0 18px 36px rgba(16, 24, 48, .28)); }
@media (max-width: 960px) {
  .hero-in { grid-template-columns: 1fr; padding-block: 48px 72px; gap: 40px; }
  .shot-widget { right: 8px; width: min(46%, 260px); }
}

/* Osiot */
.band { padding-block: 84px; }
.band-alt { background: var(--alt); }
.sub { text-align: center; color: var(--muted); max-width: 46em; margin: 14px auto 48px; font-size: 1.08rem; }
@media (max-width: 700px) { .band { padding-block: 56px; } .sub { margin-bottom: 36px; } }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.steps li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; min-width: 0; }
.steps p { color: var(--muted); margin-top: 8px; font-size: 1rem; }
.num { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700; margin-bottom: 16px; }
.code { margin: 16px 0 0; padding: 12px 14px; background: var(--ink); color: #d7e1ff; border-radius: 8px; font: .78rem/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; word-break: break-all; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

.features { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.feature { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; }
.feature h3 { font-size: 1.05rem; }
.feature p { color: var(--muted); font-size: .96rem; margin-top: 8px; }
@media (max-width: 1000px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

.showcase { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.4fr); gap: 48px; align-items: center; margin-top: 64px; }
.showcase:first-of-type { margin-top: 0; }
.showcase.is-flip { grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr); }
.showcase.is-flip .showcase-text { order: 2; }
.showcase-text h3 { font-size: 1.45rem; }
.showcase-text p { color: var(--muted); margin-top: 12px; }
.showcase-img { display: block; }
@media (max-width: 860px) { .showcase, .showcase.is-flip { grid-template-columns: 1fr; gap: 20px; margin-top: 48px; } .showcase.is-flip .showcase-text { order: 0; } }

.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; max-width: 980px; margin-inline: auto; }
.plan { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; }
.plan h3 { font-size: 1.3rem; color: var(--primary); }
.plan ul { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 10px; color: var(--muted); }
.plan strong { color: var(--fg); }
.note { text-align: center; color: var(--muted); margin-top: 32px; font-size: .98rem; }

.contact { background: var(--ink); color: #fff; }
.contact-in { text-align: center; }
.contact h2 { color: #fff; }
.contact p { color: #c3cbe0; max-width: 40em; margin: 14px auto 28px; font-size: 1.1rem; }
.contact .cta { justify-content: center; }
.contact-mail { color: #fff; font-weight: 600; }

.foot { border-top: 1px solid var(--line); padding-block: 22px; font-size: .92rem; color: var(--muted); }
.foot-in { display: flex; gap: 20px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.lang { display: flex; gap: 14px; margin: 0; }
.lang button { border: 0; background: none; padding: 0; font: inherit; color: var(--primary); cursor: pointer; }
.lang button[aria-current="true"] { color: var(--fg); font-weight: 600; cursor: default; }