/* =========================================================
   sakirkin.ru — playground stylesheet
   Modular sections: tokens, base, layout, hero, toys, game,
   kinetic, eggs, footer, themes, reduced-motion.
   ========================================================= */

/* ---------- design tokens ---------- */
:root {
  --bg-0: #0b0820;
  --bg-1: #120c2e;
  --bg-2: #1a1142;
  --ink: #f3eefb;
  --ink-dim: #b6aed3;
  --accent: #ff5dcd;
  --accent-2: #6df0ff;
  --accent-3: #ffd166;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);
  --ease-out: cubic-bezier(.22,1,.36,1);
  --ease-spring: cubic-bezier(.34,1.56,.64,1);
  --radius: 18px;
  --radius-sm: 10px;
  --shadow-1: 0 10px 40px -10px rgba(0,0,0,.6), 0 2px 8px rgba(0,0,0,.4);
  --shadow-glow: 0 0 0 1px var(--line-strong), 0 20px 60px -20px var(--accent);
  --font-display: "Space Grotesk", "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --maxw: 1200px;
}

/* alternative themes */
html[data-theme="solar"]  { --bg-0:#fff4e6; --bg-1:#ffe1bd; --bg-2:#ffd29a; --ink:#231a08; --ink-dim:#5b4a26; --accent:#ff4757; --accent-2:#1c8ef9; --accent-3:#7a4f00; --line: rgba(0,0,0,.08); --line-strong: rgba(0,0,0,.18); }
html[data-theme="mint"]   { --bg-0:#04241f; --bg-1:#0a3a30; --bg-2:#0f5546; --ink:#eafff7; --ink-dim:#9fd9c7; --accent:#3effb0; --accent-2:#ffb84d; --accent-3:#a0e8ff; }
html[data-theme="night"]  { --bg-0:#000; --bg-1:#0a0a0a; --bg-2:#141414; --ink:#fff; --ink-dim:#9a9a9a; --accent:#fff; --accent-2:#888; --accent-3:#fff; --line: rgba(255,255,255,.1); --line-strong: rgba(255,255,255,.3); }

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 80% -10%, color-mix(in oklab, var(--accent) 25%, transparent), transparent 60%),
    radial-gradient(900px 600px at -10% 60%, color-mix(in oklab, var(--accent-2) 20%, transparent), transparent 60%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 60%, var(--bg-2));
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
button { font: inherit; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--bg-0); padding: 8px 12px; border-radius: 8px; z-index: 99;
}
.skip:focus { left: 12px; top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- top nav ---------- */
.top {
  position: fixed; inset: 0 0 auto 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(16px, 4vw, 40px);
  z-index: 20;
  pointer-events: none;
}
.top > * { pointer-events: auto; }

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em;
  font-size: 18px;
}
.brand-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff, var(--accent) 60%, var(--accent-2));
  box-shadow: 0 0 24px var(--accent);
  cursor: pointer;
  transition: transform .25s var(--ease-spring);
}
.brand-dot:hover { transform: scale(1.25) rotate(20deg); }
.brand-tld { color: var(--ink-dim); }

.prefs { display: flex; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 999px;
  background: color-mix(in oklab, var(--bg-0) 60%, transparent);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  cursor: pointer;
  transition: transform .2s var(--ease-out), background .2s, border-color .2s, color .2s;
}
.chip:hover { transform: translateY(-1px); border-color: var(--accent); }
.chip:active { transform: translateY(0) scale(.97); }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--bg-0); border-color: transparent; }
.chip-ico { font-size: 12px; }
.chip-lbl { font-size: 12px; letter-spacing: .04em; text-transform: lowercase; }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100svh; min-height: 100vh;
  display: grid; place-items: center;
  padding: 120px clamp(16px, 4vw, 40px) 80px;
  overflow: hidden;
  isolation: isolate;
}
#heroCanvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  z-index: -1;
  display: block;
}
.hero-fallback {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: -2;
}
.js .js-fallback { opacity: 0; transition: opacity .6s ease; }

.hero-content {
  max-width: var(--maxw); width: 100%;
  text-align: left;
}
.eyebrow {
  display: inline-block;
  font-size: 13px; letter-spacing: .25em; text-transform: uppercase;
  color: var(--ink-dim);
  padding: 6px 12px; border: 1px solid var(--line-strong); border-radius: 999px;
  margin: 0 0 18px;
  background: color-mix(in oklab, var(--bg-0) 50%, transparent);
}

.kinetic {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 10vw, 132px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
}
.kinetic .line { display: block; }
.kinetic .word {
  display: inline-block;
  transform-origin: 50% 80%;
  transition: transform .35s var(--ease-spring), color .35s;
  will-change: transform;
}
.kinetic .word:hover { transform: translateY(-6px) rotate(-2deg); color: var(--accent); }
.kinetic .word.accent { color: var(--accent); position: relative; }
.kinetic .word.accent .ground {
  display: inline-block;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  background-size: 300% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 6s linear infinite;
}
@keyframes shimmer {
  to { background-position: 300% 0; }
}

.lede {
  max-width: 56ch;
  color: var(--ink-dim);
  font-size: clamp(15px, 1.6vw, 19px);
  line-height: 1.55;
  margin: 0 0 28px;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  --bg: color-mix(in oklab, var(--bg-0) 60%, transparent);
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 20px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  position: relative; overflow: hidden;
  transition: transform .2s var(--ease-out), border-color .2s, background .2s, color .2s;
}
.btn.sm { padding: 10px 14px; font-size: 13px; }
.btn::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120px 60px at var(--mx, 50%) var(--my, 50%), color-mix(in oklab, var(--accent) 40%, transparent), transparent 70%);
  opacity: 0; transition: opacity .25s; pointer-events: none;
}
.btn:hover::before { opacity: 1; }
.btn:hover { transform: translateY(-2px); border-color: var(--accent); }
.btn:active { transform: translateY(0) scale(.98); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg-0);
  border-color: transparent;
  font-weight: 600;
}
.btn.ghost .sparkle { animation: spin 8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.scroll-cue {
  position: absolute; left: 50%; bottom: 28px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--ink-dim); font-size: 11px; letter-spacing: .25em; text-transform: uppercase;
}
.scroll-cue span {
  width: 1px; height: 36px;
  background: linear-gradient(180deg, transparent, var(--ink-dim));
  animation: drop 1.6s var(--ease-out) infinite;
}
@keyframes drop {
  0% { transform: scaleY(0); transform-origin: top; }
  60% { transform: scaleY(1); transform-origin: top; }
  61% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* reveal */
[data-reveal] {
  opacity: 0; transform: translateY(20px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
}
[data-reveal].in { opacity: 1; transform: none; }

/* ---------- parallax band ---------- */
.parallax {
  position: relative; padding: 120px 0; overflow: hidden;
  border-block: 1px solid var(--line);
}
.px-layer {
  position: absolute; inset: 0;
  background-repeat: no-repeat;
  pointer-events: none;
}
.px-layer:nth-child(1) {
  background:
    radial-gradient(60px 60px at 10% 30%, var(--accent), transparent 60%),
    radial-gradient(40px 40px at 80% 50%, var(--accent-2), transparent 60%),
    radial-gradient(80px 80px at 50% 80%, var(--accent-3), transparent 60%);
  opacity: .35;
}
.px-layer:nth-child(2) {
  background:
    radial-gradient(120px 120px at 30% 60%, color-mix(in oklab, var(--accent) 40%, transparent), transparent 60%),
    radial-gradient(160px 160px at 70% 30%, color-mix(in oklab, var(--accent-2) 40%, transparent), transparent 60%);
  opacity: .5;
}
.px-layer:nth-child(3) {
  background:
    radial-gradient(220px 220px at 20% 80%, color-mix(in oklab, var(--accent-3) 35%, transparent), transparent 60%),
    radial-gradient(260px 260px at 85% 20%, color-mix(in oklab, var(--accent) 25%, transparent), transparent 60%);
  opacity: .55;
}
.band-title {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(40px, 8vw, 110px);
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
  margin: 0;
  overflow: hidden;
}
.band-title [data-marquee] {
  display: inline-block;
  padding-left: 100%;
  animation: marquee 28s linear infinite;
}
@keyframes marquee {
  to { transform: translateX(-100%); }
}

/* ---------- sections shared ---------- */
.sec-head {
  max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px,4vw,40px);
  display: flex; align-items: end; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.sec-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 56px); font-weight: 700; letter-spacing: -0.02em;
  margin: 0;
}
.sec-title span::before { content: "— "; color: var(--accent); }
.sec-sub { color: var(--ink-dim); margin: 0; }

/* ---------- play / toys ---------- */
.play { padding: 100px 0; }
.toybox {
  position: relative;
  margin: 40px auto 0;
  max-width: var(--maxw);
  height: clamp(420px, 60vh, 640px);
  border: 1px dashed var(--line-strong);
  border-radius: 24px;
  overflow: hidden;
  background:
    radial-gradient(800px 300px at 50% 100%, color-mix(in oklab, var(--accent) 18%, transparent), transparent 60%),
    color-mix(in oklab, var(--bg-0) 50%, transparent);
  touch-action: none;
}
.toybox::before {
  content: "drag anywhere";
  position: absolute; inset: auto 0 16px 0; text-align: center;
  font-size: 11px; letter-spacing: .25em; text-transform: uppercase; color: var(--ink-dim);
  pointer-events: none;
}
.toy {
  position: absolute;
  left: var(--x); top: var(--y);
  translate: -50% -50%;
  transform: translate3d(0,0,0) rotate(var(--r,0deg));
  cursor: grab;
  user-select: none;
  filter: drop-shadow(0 12px 24px rgba(0,0,0,.35));
  transition: filter .2s;
}
.toy.dragging { cursor: grabbing; filter: drop-shadow(0 18px 30px rgba(0,0,0,.5)); z-index: 5; }

.orb {
  width: 120px; height: 120px; border-radius: 50%;
  background: radial-gradient(circle at 30% 25%, #fff, var(--accent) 50%, color-mix(in oklab, var(--accent) 40%, var(--bg-2)));
  box-shadow: inset -10px -20px 40px rgba(0,0,0,.35), 0 0 60px color-mix(in oklab, var(--accent) 50%, transparent);
}
.blob {
  width: 160px; height: 140px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  border-radius: 60% 40% 55% 45% / 45% 50% 50% 55%;
  animation: blobMorph 8s var(--ease-out) infinite;
}
@keyframes blobMorph {
  50% { border-radius: 40% 60% 45% 55% / 55% 45% 60% 40%; }
}
.ring {
  width: 130px; height: 130px;
  border: 14px solid transparent;
  border-radius: 50%;
  background:
    linear-gradient(var(--bg-1), var(--bg-1)) padding-box,
    conic-gradient(from 0deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent)) border-box;
  animation: spin 10s linear infinite;
}
.cube {
  width: 110px; height: 110px;
  position: relative; transform-style: preserve-3d;
  animation: cubeRot 14s linear infinite;
}
.cube .f { position: absolute; inset: 0; border: 1px solid var(--line-strong); background: color-mix(in oklab, var(--accent-3) 30%, var(--bg-2)); }
.cube .f1 { transform: translateZ(55px); }
.cube .f2 { transform: rotateY(180deg) translateZ(55px); background: color-mix(in oklab, var(--accent) 30%, var(--bg-2)); }
.cube .f3 { transform: rotateY(90deg) translateZ(55px); background: color-mix(in oklab, var(--accent-2) 30%, var(--bg-2)); }
.cube .f4 { transform: rotateY(-90deg) translateZ(55px); }
.cube .f5 { transform: rotateX(90deg) translateZ(55px); }
.cube .f6 { transform: rotateX(-90deg) translateZ(55px); }
@keyframes cubeRot {
  to { transform: rotateX(360deg) rotateY(360deg); }
}

.card {
  width: 240px; padding: 18px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, color-mix(in oklab, var(--bg-0) 70%, transparent), color-mix(in oklab, var(--bg-2) 80%, transparent));
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(10px);
}
.card header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-tag { font-size: 11px; letter-spacing: .25em; text-transform: uppercase; color: var(--ink-dim); }
.card-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.card p { margin: 0; }

.reset {
  position: absolute; right: 14px; top: 14px;
  background: transparent; border: 1px solid var(--line-strong);
  color: var(--ink-dim); padding: 6px 12px; border-radius: 999px;
  cursor: pointer; font-size: 12px;
}
.reset:hover { color: var(--ink); border-color: var(--accent); }

/* ---------- mini game ---------- */
.mini { padding: 100px 0; border-top: 1px solid var(--line); }
.game {
  margin: 40px auto 0; max-width: var(--maxw); padding: 0 clamp(16px,4vw,40px);
}
.game-hud {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.game-hud > div { display: flex; flex-direction: column; gap: 2px; }
.game-hud b { font-family: var(--font-display); font-size: 28px; font-variant-numeric: tabular-nums; }
.game-hud small { color: var(--ink-dim); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; }
.game-arena {
  position: relative;
  height: clamp(360px, 55vh, 540px);
  border: 1px solid var(--line-strong); border-radius: 24px;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, color-mix(in oklab, var(--accent-2) 20%, transparent), transparent 50%),
    color-mix(in oklab, var(--bg-0) 70%, transparent);
}
.target {
  position: absolute; width: 56px; height: 56px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, var(--accent) 60%);
  box-shadow: 0 0 24px var(--accent);
  border: 0; cursor: pointer;
  animation: pop .4s var(--ease-spring);
}
.target.pop { animation: vanish .35s var(--ease-out) forwards; pointer-events: none; }
@keyframes pop {
  from { transform: scale(.2); opacity: 0; }
}
@keyframes vanish {
  to { transform: scale(1.6); opacity: 0; }
}

/* ---------- kinetic stage ---------- */
.kin { padding: 100px 0; border-top: 1px solid var(--line); }
.kinetic-stage {
  margin: 40px auto 0; max-width: var(--maxw); padding: 60px clamp(16px,4vw,40px);
  text-align: center;
}
.kinetic-big {
  font-family: var(--font-display);
  font-size: clamp(56px, 14vw, 200px);
  font-weight: 800;
  line-height: .9;
  letter-spacing: -0.04em;
  margin: 0;
}
.kinetic-big [data-letter] {
  display: inline-block;
  transform-origin: 50% 100%;
  transition: transform .35s var(--ease-spring), color .35s;
}
.kinetic-big [data-letter]:hover {
  transform: translateY(-12px) rotate(-6deg) scale(1.15);
  color: var(--accent);
}

/* ---------- eggs ---------- */
.eggs { padding: 100px 0 120px; border-top: 1px solid var(--line); }
.hints {
  max-width: var(--maxw); margin: 30px auto 0; padding: 0 clamp(16px,4vw,40px);
  list-style: none;
  display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.hints li {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: color-mix(in oklab, var(--bg-0) 50%, transparent);
  color: var(--ink-dim);
}
.hints kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; padding: 2px 6px; border-radius: 6px;
  background: color-mix(in oklab, var(--bg-2) 70%, transparent);
  border: 1px solid var(--line-strong); color: var(--ink);
}
.hints code { color: var(--accent); }
.egg-counter {
  max-width: var(--maxw); margin: 24px auto 0; padding: 0 clamp(16px,4vw,40px);
  color: var(--ink-dim);
}
.egg-counter b { color: var(--accent); font-family: var(--font-display); }

/* ---------- footer ---------- */
.foot {
  padding: 28px clamp(16px,4vw,40px);
  border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  background: color-mix(in oklab, var(--bg-0) 70%, transparent);
}
.foot nav a {
  color: var(--ink); text-decoration: none;
  border-bottom: 1px solid transparent; padding-bottom: 2px;
  transition: border-color .2s, color .2s;
}
.foot nav a:hover { border-color: var(--accent); color: var(--accent); }
.foot .dot { color: var(--ink-dim); margin: 0 10px; }
.foot small { color: var(--ink-dim); }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--bg-0);
  padding: 10px 16px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
  opacity: 0; pointer-events: none;
  transition: opacity .3s, transform .3s var(--ease-spring);
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- reduced motion ---------- */
html[data-motion="reduced"] *,
html[data-motion="reduced"] *::before,
html[data-motion="reduced"] *::after {
  animation-duration: 0s !important;
  animation-iteration-count: 1 !important;
  transition-duration: .01s !important;
}
html[data-motion="reduced"] .scroll-cue span,
html[data-motion="reduced"] [data-marquee],
html[data-motion="reduced"] .blob,
html[data-motion="reduced"] .ring,
html[data-motion="reduced"] .cube { animation: none !important; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- responsive tweaks ---------- */
@media (max-width: 640px) {
  .chip-lbl { display: none; }
  .toy .card { width: 200px; }
  .orb { width: 90px; height: 90px; }
  .blob { width: 120px; height: 110px; }
  .ring { width: 100px; height: 100px; border-width: 10px; }
  .cube { width: 80px; height: 80px; }
  .cube .f1,.cube .f2,.cube .f3,.cube .f4,.cube .f5,.cube .f6 { /* recalc not necessary */ }
}