/* ===========================================================
   Sivuvelho — tyylitiedosto
   Konsepti: tekninen piirustus / sinikopio (blueprint).
   Fontit: IBM Plex Sans (leipäteksti, otsikot), IBM Plex Mono (mitat, tunnisteet)
   =========================================================== */

:root {
  --bg: #1c1230;
  --bg-deep: #120b21;
  --surface: #26183f;
  --surface-raised: #32204f;
  --line: #3d2a5c;
  --line-strong: #6a49a3;
  --ink: #eee8f7;
  --ink-soft: #b6a6d6;
  --ink-faint: #8a76b0;
  --accent: #9b6ee0;
  --accent-deep: #7c4fc4;
  --on-accent: #120b21;

  --font-head: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

body {
  margin: 0;
  background:
    linear-gradient(var(--bg), var(--bg)) fixed,
    repeating-linear-gradient(to right, rgba(230,240,245,0.035) 0 1px, transparent 1px 64px) fixed,
    repeating-linear-gradient(to bottom, rgba(230,240,245,0.035) 0 1px, transparent 1px 64px) fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em 0;
}

h1 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); font-weight: 500; }
h2 { font-size: 1.7rem; }
h3 { font-size: 1.1rem; }

p { margin: 0 0 1em 0; max-width: 60ch; color: var(--ink); }

a { color: var(--accent); }

::selection { background: var(--accent); color: var(--on-accent); }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top bar ---------- */

.topbar {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.topbar-inner {
  display: flex;
  gap: 24px;
  padding: 7px 24px;
  flex-wrap: wrap;
}

.topbar a { color: var(--ink-soft); text-decoration: none; }
.topbar a:hover { color: var(--accent); }

/* ---------- Header ---------- */

.site-header {
  background: rgba(18, 34, 47, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.2rem;
  color: var(--ink);
  text-decoration: none;
}

.logo-mark { color: var(--accent); display: inline-flex; align-items: center; }
.logo-mark img { display: block; border-radius: 50%; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
}

.main-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.main-nav a:hover { color: var(--ink); border-bottom-color: var(--line-strong); }

.nav-cta {
  border: 1px solid var(--line-strong);
  padding: 7px 16px;
  color: var(--ink) !important;
}

.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 12px 24px;
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 500;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover { background: var(--accent-deep); }

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}

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

/* ---------- Hero ---------- */

.hero {
  padding: 76px 0 64px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-faint);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
  margin-bottom: 16px;
}

.hero-lede { color: var(--ink-soft); }

.hero-actions {
  display: flex;
  gap: 14px;
  margin: 24px 0 36px;
  flex-wrap: wrap;
}

.hero-facts {
  display: flex;
  gap: 34px;
  margin: 0;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.hero-facts dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.hero-facts dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.1rem;
}

/* --- Hero schematic illustration --- */

.hero-visual {
  position: relative;
  padding: 6px 4px 26px;
}

.dim-line {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  gap: 8px;
}

.dim-top { margin-bottom: 10px; }
.dim-top::before,
.dim-top::after {
  content: "";
  height: 1px;
  background: var(--line-strong);
  flex: 1;
}

.dim-side { margin-top: 10px; justify-content: center; }

.browser-mock {
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--surface);
}

.browser-mock::before,
.browser-mock::after {
  content: "";
  position: absolute;
  width: 9px;
  height: 9px;
  border: 1px solid var(--accent);
  opacity: 0.8;
}
.browser-mock::before { top: -1px; left: -1px; border-width: 1px 0 0 1px; }
.browser-mock::after { bottom: -1px; right: -1px; border-width: 0 1px 1px 0; }

.browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}

.browser-bar .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  display: inline-block;
}

.browser-url {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  padding: 2px 10px;
  background: var(--bg);
}

.browser-body { padding: 22px; }

.mock-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px dashed var(--line);
}

.mock-logo {
  width: 22px; height: 22px;
  border: 1px solid var(--accent);
  background: transparent;
}

.mock-link {
  width: 44px; height: 1px;
  background: var(--line-strong);
}

.mock-hero { margin-bottom: 22px; }

.mock-h1 {
  height: 12px;
  width: 82%;
  border: 1px solid var(--line-strong);
  background: transparent;
  margin-bottom: 10px;
}

.mock-h1.short { width: 52%; opacity: 0.6; }

.mock-btn {
  width: 100px; height: 22px;
  background: var(--accent);
  opacity: 0.9;
  margin-top: 16px;
}

.mock-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.mock-card {
  height: 54px;
  border: 1px dashed var(--line);
}

/* ---------- Section shared ---------- */

section { padding: 72px 0; }

.section-lede {
  color: var(--ink-soft);
  max-width: 60ch;
  margin-bottom: 42px;
}

/* ---------- Services ---------- */

.services { background: var(--bg-deep); border-bottom: 1px solid var(--line); }

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-card {
  background: var(--bg-deep);
  padding: 30px 26px;
}

.service-icon { color: var(--accent); margin-bottom: 16px; }

.service-card p { color: var(--ink-soft); font-size: 0.95rem; margin-bottom: 0; }

/* ---------- FAQ ---------- */

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.faq summary {
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--ink-faint);
  flex: none;
}

.faq details[open] summary::after { content: "\2212"; color: var(--accent); }

.faq details p {
  color: var(--ink-soft);
  margin: 14px 0 0;
}

/* ---------- Contact ---------- */

.contact {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 54px;
}

.contact-details {
  margin: 28px 0 0;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.contact-details div { margin-bottom: 12px; }

.contact-details dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
}

.contact-details dd { margin: 0; font-family: var(--font-head); font-weight: 500; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 28px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.contact-form input,
.contact-form textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 10px 11px;
  border: 1px solid var(--line-strong);
  background: var(--bg-deep);
  color: var(--ink);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.contact-form button { align-self: flex-start; margin-top: 4px; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 46px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 30px;
  padding-bottom: 34px;
}

.site-footer .logo { color: var(--ink); }
.site-footer p { color: var(--ink-faint); font-size: 0.9rem; }

.footer-grid h4 {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-bottom: 12px;
}

.footer-grid dd,
.footer-grid p { line-height: 1.7; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding: 18px 24px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Focus visibility ---------- */

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .hero-grid,
  .contact-grid { grid-template-columns: 1fr; }

  .service-grid { grid-template-columns: 1fr 1fr; }

  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .header-inner { flex-direction: column; gap: 12px; align-items: flex-start; }
  .main-nav { gap: 16px; }

  .service-grid { grid-template-columns: 1fr; }

  .hero-facts { flex-wrap: wrap; row-gap: 14px; }
}