/* ============================================================
   FLYF® — PARTICLE FIELD
   Palette: void #070708 / bone #EDEAE2 / acid #C6FF4A
   Type:    Clash Display / Space Mono / Instrument Serif
   ============================================================ */

:root {
  --bg: #070708;
  --ink: #EDEAE2;
  --acc: #C6FF4A;
  --mut: #76766D;
  --line: rgba(237, 234, 226, 0.14);
  --disp: "Clash Display", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: "Space Mono", "Courier New", "Microsoft YaHei", monospace;
  --serif: "Instrument Serif", Georgia, serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io: cubic-bezier(0.83, 0, 0.17, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  background: var(--bg);
  scrollbar-width: thin;
  scrollbar-color: #2a2a2c transparent;
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2a2a2c; border-radius: 3px; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--disp);
  overflow-x: clip;
  overscroll-behavior-y: none;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

::selection { background: var(--acc); color: #0a0a0a; }

a { color: inherit; text-decoration: none; }
button { background: none; border: none; color: inherit; font: inherit; cursor: pointer; }

svg.lucide { stroke-width: 1.5px; }

.mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 400;
  line-height: 1.7;
}

.serif {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--acc);
  text-transform: none;
  letter-spacing: 0;
  padding-right: 0.06em;
}

/* ---------- fixed layers ---------- */

#gl {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 45% at 22% 18%, rgba(198, 255, 74, 0.05), transparent 65%),
    radial-gradient(ellipse 55% 45% at 82% 85%, rgba(110, 80, 255, 0.07), transparent 65%);
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: radial-gradient(ellipse 120% 100% at 50% 50%, transparent 55%, rgba(4, 4, 5, 0.55) 100%);
}

.grain {
  position: fixed;
  inset: -120%;
  width: 340%;
  height: 340%;
  z-index: 60;
  pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='300'%20height='300'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='0.85'%20numOctaves='2'%20stitchTiles='stitch'/%3E%3C/filter%3E%3Crect%20width='300'%20height='300'%20filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 9s steps(10) infinite;
}
@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); }
  60% { transform: translate(-2%, -2%); }
  80% { transform: translate(3%, 2%); }
}

/* ---------- preloader ---------- */

#preloader {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 5vw;
  transition: clip-path 1s var(--ease-io) 0.15s, visibility 0s linear 1.3s;
  clip-path: inset(0 0 0% 0);
}
.pre-meta { color: var(--mut); margin-bottom: auto; padding-top: 2vh; }
.pre-count {
  font-family: var(--disp);
  font-weight: 700;
  font-size: clamp(6rem, 22vw, 18rem);
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.pre-count::after { content: "%"; font-size: 0.25em; color: var(--acc); vertical-align: super; margin-left: 0.08em; }
.pre-bar {
  margin-top: 3vh;
  height: 1px;
  width: 100%;
  background: var(--line);
  position: relative;
  overflow: hidden;
}
.pre-bar span {
  position: absolute;
  inset: 0;
  background: var(--acc);
  transform-origin: left center;
  transform: scaleX(0);
}
body.is-loaded #preloader {
  clip-path: inset(0 0 100% 0);
  visibility: hidden;
  pointer-events: none;
}

/* ---------- header ---------- */

.site-head {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  mix-blend-mode: difference;
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity 0.9s var(--ease-out) 0.9s, transform 0.9s var(--ease-out) 0.9s;
}
body.is-loaded .site-head { opacity: 1; transform: none; }

.brand { display: inline-flex; align-items: center; gap: 8px; }
.brand-ast { width: 18px; height: 18px; color: var(--acc); animation: spin 14s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.brand-word {
  font-family: var(--disp);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.04em;
}
.brand-word sup { font-size: 0.5em; color: var(--acc); }

.site-nav { display: flex; gap: 28px; }
.site-nav a {
  position: relative;
  padding: 4px 0;
  color: var(--mut);
  transition: color 0.35s;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background: var(--acc);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.45s var(--ease-out);
}
.site-nav a:hover, .site-nav a.active { color: var(--ink); }
.site-nav a:hover::after, .site-nav a.active::after {
  transform: scaleX(1);
  transform-origin: left center;
}

.head-meta { display: flex; align-items: center; gap: 10px; color: var(--mut); }
.head-meta #clock { color: var(--ink); font-variant-numeric: tabular-nums; }
.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--acc);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

/* ---------- side index ---------- */

.side-index {
  position: fixed;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-end;
  opacity: 0;
  transition: opacity 0.9s var(--ease-out) 1.2s;
}
body.is-loaded .side-index { opacity: 1; }
.side-index button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--mut);
  transition: color 0.35s;
}
.side-index .si-label {
  opacity: 0;
  transform: translateX(6px);
  transition: opacity 0.35s, transform 0.35s var(--ease-out);
}
.side-index button:hover .si-label,
.side-index button.active .si-label { opacity: 1; transform: none; }
.side-index button.active { color: var(--acc); }
.side-index .si-num { position: relative; padding-bottom: 2px; }
.side-index button.active .si-num::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--acc);
}

/* ---------- sections ---------- */

#content { position: relative; z-index: 2; }

.sec {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  padding: 16vh 5vw 12vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.sec .mono {
  text-shadow: 0 1px 14px rgba(4, 4, 5, 0.9);
}

.sec-head {
  color: var(--mut);
  margin-bottom: 5vh;
  display: flex;
  align-items: center;
  gap: 12px;
}
.sec-head::after {
  content: "";
  height: 1px;
  flex: 0 0 clamp(40px, 8vw, 120px);
  background: var(--line);
}

/* ----- hero ----- */

.sec-hero { justify-content: center; }
.hero-inner { will-change: transform; }

.eyebrow { color: var(--mut); margin-bottom: 4vh; }

.hero-title {
  font-family: var(--disp);
  font-weight: 700;
  font-size: clamp(5rem, 19vw, 19rem);
  line-height: 0.85;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  mix-blend-mode: difference;
}
.ht-row { display: block; overflow: hidden; padding-bottom: 0.02em; }
.ht-line {
  display: inline-block;
  transform: translateY(115%);
  transition: transform 1.2s var(--ease-out);
}
.ht-row:nth-child(2) .ht-line { transition-delay: 0.12s; }
body.is-loaded .ht-line { transform: translateY(0); }
.ht-outline {
  color: transparent;
  -webkit-text-stroke: clamp(1px, 0.16vw, 2.5px) var(--ink);
}
.ht-sup { display: inline-block; vertical-align: super; margin-left: 0.05em; }
.ht-sup svg {
  width: clamp(20px, 4.5vw, 64px);
  height: clamp(20px, 4.5vw, 64px);
  color: var(--acc);
  -webkit-text-stroke: 0;
  animation: spin 10s linear infinite;
}

.hero-foot {
  margin-top: 6vh;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  color: var(--mut);
}
.scroll-hint { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); }
.scroll-hint svg { width: 14px; height: 14px; color: var(--acc); animation: bob 2s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(4px); } }
body.scrolled .scroll-hint { opacity: 0; transition: opacity 0.5s; }

[data-load] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1s var(--ease-out) 0.5s, transform 1s var(--ease-out) 0.5s;
}
body.is-loaded [data-load] { opacity: 1; transform: none; }

/* ----- statements ----- */

.statement, .contact-title {
  font-family: var(--disp);
  font-weight: 600;
  font-size: clamp(2.6rem, 7.2vw, 7rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  max-width: 14em;
}
.contact-title { mix-blend-mode: difference; }
.st-line { display: block; }
.statement .serif, .contact-title .serif { font-size: 1.06em; }

.side-note {
  margin-top: 6vh;
  max-width: 460px;
  color: var(--mut);
  align-self: flex-end;
  text-align: right;
}

/* ----- marquee ----- */

.marquee {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  overflow: hidden;
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marq 26s linear infinite;
}
.marquee-group {
  display: flex;
  align-items: center;
  gap: 3.2rem;
  padding-right: 3.2rem;
  font-family: var(--disp);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.6vw, 2.4rem);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
}
.marquee-group svg { width: 1em; height: 1em; color: var(--acc); flex: none; }
@keyframes marq { to { transform: translateX(-50%); } }

/* ----- craft rows ----- */

.rows { border-top: 1px solid var(--line); }
.row {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem 1fr auto 2.5rem;
  align-items: center;
  gap: 2rem;
  padding: clamp(1.4rem, 3.4vh, 2.6rem) 1rem;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.row::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--acc);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.5s var(--ease-io);
}
.row:hover::before { transform: scaleY(1); transform-origin: bottom center; }
.row > * { position: relative; z-index: 1; transition: color 0.3s; }
.row-idx { color: var(--mut); }
.row h3 {
  font-family: var(--disp);
  font-weight: 600;
  font-size: clamp(1.7rem, 4.6vw, 4rem);
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 1;
  text-shadow: 0 1px 22px rgba(4, 4, 5, 0.8);
}
.row:hover h3 { text-shadow: none; }
.row-tag { color: var(--mut); text-align: right; }
.row > svg { width: 26px; height: 26px; color: var(--mut); transition: transform 0.4s var(--ease-out), color 0.3s; }
.row:hover > * { color: #0a0a0a; }
.row:hover > svg { color: #0a0a0a; transform: translate(5px, -5px); }

/* ----- contact ----- */

.cta-row {
  margin-top: 7vh;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 1.05rem 1.7rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--ink);
  color: #0a0a0a;
  transition: background 0.4s var(--ease-out), color 0.4s, border-color 0.4s, transform 0.4s var(--ease-out);
}
.btn svg { width: 16px; height: 16px; }
.btn:hover { background: var(--acc); border-color: var(--acc); transform: translateY(-3px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: transparent; border-color: var(--acc); color: var(--acc); transform: translateY(-3px); }

.site-foot {
  margin-top: auto;
  padding-top: 10vh;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--mut);
}
.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink);
}
.to-top svg { width: 14px; height: 14px; color: var(--acc); transition: transform 0.35s var(--ease-out); }
.to-top:hover svg { transform: translateY(-4px); }

/* ---------- reveal on scroll ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(46px);
  transition: opacity 1.1s var(--ease-out) var(--d, 0s), transform 1.1s var(--ease-out) var(--d, 0s);
}
[data-reveal].in-view { opacity: 1; transform: none; }

[data-skew] { will-change: transform; }

/* ---------- cursor ---------- */

.c-dot, .c-ring {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  pointer-events: none;
  border-radius: 50%;
  mix-blend-mode: difference;
  opacity: 0;
}
.c-dot { width: 6px; height: 6px; background: var(--acc); }
.c-ring {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(237, 234, 226, 0.65);
  transition: width 0.35s var(--ease-out), height 0.35s var(--ease-out), border-color 0.35s, background 0.35s;
}
body[data-cursor="hover"] .c-ring {
  width: 64px;
  height: 64px;
  border-color: var(--acc);
  background: rgba(198, 255, 74, 0.12);
}
body.cursor-on .c-dot, body.cursor-on .c-ring { opacity: 1; }
@media (pointer: fine) {
  body.cursor-on, body.cursor-on a, body.cursor-on button, body.cursor-on .row { cursor: none; }
}

/* ---------- noscript / no-webgl ---------- */

.noscript {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 300;
  padding: 16px;
  text-align: center;
  background: var(--acc);
  color: #0a0a0a;
}
body.no-webgl .bg-glow {
  background:
    radial-gradient(ellipse 70% 55% at 25% 20%, rgba(198, 255, 74, 0.14), transparent 65%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(110, 80, 255, 0.18), transparent 65%);
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .site-nav { display: none; }
  .side-index { display: none; }
  .sec { padding: 14vh 6vw 10vh; }
  .hero-title { font-size: clamp(4rem, 23vw, 12rem); }
  .row { grid-template-columns: 2.2rem 1fr auto; gap: 1rem; }
  .row > svg { display: none; }
  .row-tag { display: none; }
  .side-note { text-align: left; align-self: flex-start; }
  .site-foot { flex-direction: column; align-items: flex-start; gap: 10px; }
  .foot-mid { order: 3; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
  [data-reveal], [data-load], .ht-line { opacity: 1; transform: none; }
  .marquee-track { animation: none; }
}