/* =====================================================================
   Treeni — base: reset, typografia, safe-area, scroll, focus
   ===================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  background: var(--bg);
  scrollbar-color: var(--surface-3) transparent;
  scrollbar-width: thin;
}
body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh-body);
  font-weight: var(--fw-regular);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overscroll-behavior-y: none;
  font-feature-settings: "cv11", "ss01";
}
/* Atmosfääri: kaksi himmeää neonsumua + hieno pistegrid, kiinteänä taustalla */
body::before {
  content: "";
  position: fixed; inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 60% at 110% -10%, rgba(39,232,255,.10), transparent 55%),
    radial-gradient(90% 50% at -20% 0%, rgba(182,255,59,.08), transparent 60%),
    radial-gradient(80% 40% at 50% 120%, rgba(255,61,154,.06), transparent 60%),
    radial-gradient(rgba(255,255,255,.035) 1px, transparent 1.2px) 0 0 / 22px 22px,
    var(--bg);
}

img, svg, video, canvas { display: block; max-width: 100%; }
svg { overflow: visible; }
button, input, select, textarea { font: inherit; color: inherit; letter-spacing: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; touch-action: manipulation; }
a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--text); }
hr { border: 0; border-top: 1px solid var(--line); margin: var(--sp-5) 0; }
ul, ol { padding-left: 1.25em; }
[hidden] { display: none !important; }
::selection { background: var(--lime); color: var(--text-on-accent); }

/* ---------- Typografia ---------- */
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
  color: var(--text);
  text-wrap: balance;
}
h1, .t-h1 { font-size: var(--fs-2xl); font-weight: var(--fw-heavy); line-height: 1.1; }
h2, .t-h2 { font-size: var(--fs-xl); }
h3, .t-h3 { font-size: var(--fs-lg); }
h4, .t-h4 { font-size: var(--fs-md); }
p { margin: 0 0 var(--sp-3); text-wrap: pretty; }
p:last-child { margin-bottom: 0; }
small, .t-small { font-size: var(--fs-sm); }
.t-body   { font-size: var(--fs-md); }
.t-muted  { color: var(--text-muted); }
.t-dim    { color: var(--text-2); }
.t-center { text-align: center; }
.t-accent { color: var(--lime); }
.t-cyan   { color: var(--cyan); }
.t-magenta{ color: var(--magenta); }
.t-orange { color: var(--orange); }
.t-danger { color: var(--red); }
.t-caps, .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--text-muted);
  line-height: 1.3;
}
.eyebrow { display: inline-flex; align-items: center; gap: var(--sp-2); }
.eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 2px;
  background: var(--eyebrow-c, var(--lime));
  box-shadow: 0 0 8px var(--eyebrow-c, var(--lime));
}
.eyebrow--cyan { --eyebrow-c: var(--cyan); }
.eyebrow--magenta { --eyebrow-c: var(--magenta); }
.eyebrow--orange { --eyebrow-c: var(--orange); }
.eyebrow--plain::before { display: none; }

/* Numerot: tiiviit, tabular */
.num, .t-num {
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum", "ss01", "cv11";
  letter-spacing: var(--ls-num);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
}
.num-xl { font-size: var(--fs-num-xl); font-weight: var(--fw-heavy); }
.num-lg { font-size: var(--fs-num-lg); font-weight: var(--fw-heavy); }
.num-md { font-size: var(--fs-2xl); }
.num-sm { font-size: var(--fs-lg); letter-spacing: -.02em; }
.num-unit {
  font-family: var(--font-mono);
  font-size: .38em;
  font-weight: var(--fw-medium);
  letter-spacing: .04em;
  color: var(--text-muted);
  margin-left: .2em;
  text-transform: lowercase;
}
.tabular { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }

/* ---------- Focus ---------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--r-sm);
  box-shadow: 0 0 0 6px var(--cyan-a10);
}

/* Ruudunlukija-teksti */
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: calc(var(--safe-top) + 8px); left: 8px; z-index: var(--z-toast);
  padding: 10px 14px; background: var(--lime); color: var(--text-on-accent);
  border-radius: var(--r-sm); font-weight: var(--fw-bold); transform: translateY(-200%);
  transition: transform var(--dur-fast) var(--ease-out);
}
.skip-link:focus { transform: none; }

/* ---------- Scroll ---------- */
.scroll-y { overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; }
.scroll-x {
  display: flex; overflow-x: auto; scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch; scrollbar-width: none;
  overscroll-behavior-x: contain;
}
.scroll-x::-webkit-scrollbar { display: none; }
.scroll-x > * { scroll-snap-align: start; flex: none; }
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 3px; }
::-webkit-scrollbar-track { background: transparent; }
body.no-scroll { overflow: hidden; }

/* ---------- Apuluokat ---------- */
.stack   { display: flex; flex-direction: column; gap: var(--stack-gap, var(--sp-4)); }
.stack-2 { --stack-gap: var(--sp-2); }
.stack-3 { --stack-gap: var(--sp-3); }
.stack-5 { --stack-gap: var(--sp-5); }
.stack-6 { --stack-gap: var(--sp-6); }
.row     { display: flex; align-items: center; gap: var(--row-gap, var(--sp-3)); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); }
.row-wrap { flex-wrap: wrap; }
.grow    { flex: 1 1 auto; min-width: 0; }
.grid-2  { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-3); }
.grid-3  { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--sp-3); }
.mt-0 { margin-top: 0 !important; } .mt-2 { margin-top: var(--sp-2); } .mt-4 { margin-top: var(--sp-4); } .mt-6 { margin-top: var(--sp-6); }
.mb-2 { margin-bottom: var(--sp-2); } .mb-4 { margin-bottom: var(--sp-4); }
.w-full { width: 100%; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}