/* =========================================================
   OctoBrain — octo-brain.com
   Teal/Cyan = B2B Engineering   |   Yellow = In-house Games
   ========================================================= */

/* ===== TOKENS ===== */
:root{
  --bg-0:#070B14;
  --bg-1:#0A101C;
  --bg-2:#0E1626;

  --line:rgba(56,189,197,.16);
  --line-soft:rgba(56,189,197,.09);

  --teal:#14C2C2;
  --cyan:#2EE6E0;
  --teal-deep:#009A9A;
  --yellow:#F2F53F;
  --yellow-soft:rgba(242,245,63,.08);

  --text-0:#E6F0F2;
  --text-1:#9FB1BC;
  --text-2:#8B9DB1;

  --font-body:'Pretendard Variable',Pretendard,'Noto Sans KR',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif;
  --font-display:'Chakra Petch','Pretendard Variable','Noto Sans KR',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
  --font-pixel:'Press Start 2P',monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ===== RESET / BASE ===== */
*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth}

body,h1,h2,h3,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}

body{
  background-color:var(--bg-0);
  background-image:radial-gradient(rgba(45,212,212,.045) 1px,transparent 1px);
  background-size:26px 26px;
  background-attachment:fixed;
  color:var(--text-1);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  word-break:keep-all;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit;color:inherit}
strong{font-weight:600}

h1,h2,h3{font-family:var(--font-display);color:var(--text-0);line-height:1.25;font-weight:600}

::selection{background:rgba(46,230,224,.25)}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.skip-link{
  position:absolute;left:16px;top:-64px;z-index:200;
  padding:10px 18px;border-radius:8px;
  background:var(--bg-2);border:1px solid var(--line);
  color:var(--text-0);font-family:var(--font-mono);font-size:13px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.container{
  max-width:1140px;
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,32px);
}

section[id]{scroll-margin-top:80px}
.section{padding-block:clamp(72px,10vw,120px)}
.section-alt{
  background:var(--bg-1);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}

/* ===== SHARED — SECTION HEADS ===== */
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--teal);
}
.eyebrow-pixel{
  font-family:var(--font-pixel);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--yellow);
}
.sec-head h2,
.about-body h2{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(1.7rem,3.4vw,2.5rem);
  margin-top:10px;
}
.lead{
  color:var(--text-1);
  max-width:640px;
  margin-top:14px;
}
.sec-cta{margin-top:44px}

/* ===== SHARED — CARDS ===== */
.card{
  position:relative;
  background:linear-gradient(180deg,var(--bg-2),#0B111E);
  border:1px solid var(--line);
  border-radius:14px;
  padding:28px;
  transition:transform .2s var(--ease),border-color .2s,box-shadow .2s;
}
.card::before{
  content:"";
  position:absolute;top:14px;left:14px;
  width:18px;height:18px;
  border-top:2px solid var(--teal);
  border-left:2px solid var(--teal);
  opacity:.6;
  pointer-events:none;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(46,230,224,.5);
  box-shadow:0 12px 40px -12px rgba(46,230,224,.22);
}
.card-y::before{border-top-color:var(--yellow);border-left-color:var(--yellow)}
.card-y:hover{
  border-color:rgba(242,245,63,.5);
  box-shadow:0 12px 40px -12px rgba(242,245,63,.22);
}

/* ===== SHARED — CHIPS ===== */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  font-family:var(--font-mono);
  font-size:11.5px;
  line-height:1.6;
  padding:4px 11px;
  border-radius:999px;
  border:1px solid rgba(56,189,197,.3);
  color:#7FD8DC;
  background:rgba(20,194,194,.06);
}
.chip-y{
  border-color:rgba(242,245,63,.3);
  color:#E7EA8F;
  background:var(--yellow-soft);
}

/* ===== SHARED — BUTTONS ===== */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-body);
  font-weight:600;
  font-size:15px;
  line-height:1.3;
  border-radius:10px;
  padding:14px 26px;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s,box-shadow .2s,border-color .2s;
}
.arr{transition:transform .2s var(--ease)}

.btn-primary{
  background:linear-gradient(135deg,#14C2C2,#0E9AA6);
  color:#04222A;
}
.btn-primary:hover{box-shadow:0 8px 30px -8px rgba(46,230,224,.5)}
.btn-primary:hover .arr{transform:translateX(3px)}

.btn-game{
  background:transparent;
  border:1.5px solid var(--yellow);
  color:var(--yellow);
}
.btn-game:hover{
  background:rgba(242,245,63,.1);
  box-shadow:0 8px 30px -10px rgba(242,245,63,.35);
}
.btn-game:hover .arr{transform:translateY(3px)}

.btn-disabled{
  opacity:.4;
  cursor:not-allowed;
  pointer-events:none;
  border:1px solid var(--line);
  color:var(--text-2);
  background:transparent;
}
.btn-block{width:100%;justify-content:center}

/* ===== SHARED — BINARY DECOR ===== */
.binary{
  position:absolute;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.9;
  color:rgba(45,212,212,.07);
  white-space:nowrap;
  pointer-events:none;
  user-select:none;
}

/* ===== HEADER ===== */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  height:64px;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .25s,border-color .25s,backdrop-filter .25s;
}
.site-header.scrolled{
  background:rgba(7,11,20,.85);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line-soft);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;margin-right:auto}
.brand-mark{height:30px;width:auto}
.brand-name{height:18px;width:auto}

.nav-desk{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--text-1);
  transition:color .2s;
}
.nav-link::after{
  content:"";
  position:absolute;left:50%;bottom:-9px;
  width:4px;height:4px;border-radius:50%;
  background:currentColor;
  transform:translateX(-50%) scale(0);
  transition:transform .2s var(--ease);
}
.nav-link:hover,.nav-link.active{color:var(--cyan)}
.nav-link-game:hover,.nav-link-game.active{color:var(--yellow)}
.nav-link.active::after{transform:translateX(-50%) scale(1)}

.btn-nav{
  padding:8px 16px;
  border:1px solid rgba(20,194,194,.5);
  border-radius:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--cyan);
  transition:background-color .2s;
}
.btn-nav:hover{background:rgba(20,194,194,.12)}

.nav-toggle{display:none;padding:8px;margin-right:-8px}
.nav-toggle-box{display:block;width:22px;height:14px;position:relative}
.nav-toggle-box span{
  position:absolute;left:0;
  display:block;width:100%;height:1.5px;
  background:var(--text-0);
  border-radius:2px;
  transition:background-color .2s;
}
.nav-toggle-box span:nth-child(1){top:0}
.nav-toggle-box span:nth-child(2){top:6.25px}
.nav-toggle-box span:nth-child(3){top:12.5px}
.nav-toggle:hover .nav-toggle-box span{background:var(--cyan)}

/* ===== MOBILE MENU ===== */
.mobile-menu{
  position:fixed;
  inset:0;
  z-index:120;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(7,11,20,.97);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s;
}
.mobile-menu.open{opacity:1;visibility:visible}
.menu-close{
  position:absolute;
  top:19px;right:clamp(20px,4vw,32px);
  color:var(--text-1);
  padding:4px;
  transition:color .2s;
}
.menu-close:hover{color:var(--cyan)}
.mobile-nav{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:28px;
}
.mobile-nav .nav-link{
  font-family:var(--font-display);
  font-size:1.5rem;
  font-weight:600;
  color:var(--text-0);
}
.mobile-nav .nav-link::after{bottom:-12px}
.btn-nav-lg{margin-top:8px;padding:12px 26px;font-size:13.5px}

/* ===== HERO ===== */
.hero{
  position:relative;
  min-height:100svh;
  display:grid;
  place-items:center;
  overflow:hidden;
  background-image:url("../img/hero-poster.jpg");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.hero-video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index:0;
  opacity:0;
  transition:opacity .9s ease;
}
.hero-video.playing{
  opacity:1;
}
.hero-overlay{
  position:absolute;
  inset:0;
  z-index:1;
  background:
    radial-gradient(ellipse 62% 52% at 50% 47%,rgba(7,11,20,.62),transparent 72%),
    radial-gradient(ellipse at center,transparent 40%,rgba(7,11,20,.5) 100%),
    linear-gradient(180deg,rgba(7,11,20,.6) 0%,rgba(7,11,20,.42) 45%,rgba(7,11,20,.97) 92%);
}
.binary-hero-a{top:15%;left:3%;z-index:1}
.binary-hero-b{bottom:18%;right:3%;text-align:right;z-index:1}

.hero-inner{
  position:relative;
  z-index:2;
  text-align:center;
  padding-top:64px;
}
.hero-eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--cyan);
}
.hero-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.3rem,5.4vw,4.1rem);
  line-height:1.12;
  margin-top:18px;
  text-shadow:0 2px 28px rgba(4,8,16,.85);
}
.grad{
  background:linear-gradient(90deg,#2EE6E0,#14C2C2);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.hero-sep{color:var(--text-2)}
.hero-title-alt{
  display:block;
  color:var(--text-0);
  font-size:.6em;
  font-weight:600;
  letter-spacing:.02em;
  margin-top:12px;
}

.hero-sub{
  margin:20px auto 0;
  max-width:34em;
  font-size:clamp(1rem,1.5vw,1.15rem);
  color:#B9C7D2;
  text-shadow:0 1px 16px rgba(4,8,16,.8);
}
.hero-cta{
  margin-top:36px;
  display:flex;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}

.scroll-cue{
  position:absolute;
  bottom:28px;left:50%;
  transform:translateX(-50%);
  z-index:2;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
}
.scroll-cue-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.3em;
  color:var(--text-2);
}
.scroll-cue-line{
  position:relative;
  display:block;
  width:1px;height:36px;
  background:var(--teal-deep);
  opacity:.45;
}
.scroll-cue-dot{
  position:absolute;
  left:50%;top:0;
  width:3px;height:3px;
  border-radius:50%;
  background:var(--cyan);
  animation:cue-fall 2s var(--ease) infinite;
}
@keyframes cue-fall{
  0%{transform:translate(-50%,0);opacity:0}
  25%{opacity:1}
  75%{opacity:1}
  100%{transform:translate(-50%,33px);opacity:0}
}

/* ===== TRACKS ===== */
.tracks{
  padding-block:clamp(56px,7vw,80px);
  background:var(--bg-1);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.tracks-intro{
  text-align:center;
  color:var(--text-1);
  font-size:15px;
}
.tracks-intro strong{color:var(--text-0)}
.tracks-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  margin-top:28px;
}
.tile{padding:24px 26px}
.tile-eng{border-left:3px solid var(--teal)}
.tile-game{border-left:3px solid var(--yellow)}
.badge{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:10.5px;
  padding:3px 10px;
  border-radius:999px;
}
.badge-teal{background:rgba(20,194,194,.12);color:var(--cyan)}
.badge-yellow{background:var(--yellow-soft);color:var(--yellow)}
.tile-title{
  font-family:var(--font-display);
  font-size:1.2rem;
  margin-top:12px;
}
.tile-copy{
  font-size:14.5px;
  color:var(--text-1);
  margin-top:6px;
}
.tile-link{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--cyan);
  margin-top:14px;
  transition:opacity .2s;
}
.tile-link-y{color:var(--yellow)}
.tile-link:hover{opacity:.72}

/* ===== SERVICES ===== */
.svc-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
  margin-top:44px;
}
.svc-icon{color:var(--cyan)}
.svc-title{
  font-family:var(--font-display);
  font-size:1.15rem;
  margin-top:16px;
}
.svc-desc{
  font-size:14.5px;
  margin-top:10px;
}
.svc-card .chips{margin-top:18px}

.process{margin-top:56px}
.process-head{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.15em;
  color:var(--teal);
}
.process-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  margin-top:18px;
}
.process-step{display:flex;flex-direction:column}
.process-num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--teal);
}
.process-label{
  font-weight:600;
  font-size:15px;
  color:var(--text-0);
  margin-top:6px;
}
.process-desc{
  font-size:13px;
  color:var(--text-2);
  line-height:1.6;
}

/* ===== GAMES ===== */
.games{
  position:relative;
  overflow:hidden;
  background:#0A0F1A;
  border-top:1px solid rgba(242,245,63,.18);
}
.games::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.013) 0 1px,transparent 1px 3px);
}
.games > .container{position:relative;z-index:1}
.binary-games{top:12%;right:4%;text-align:right;z-index:0}

.notice{
  margin-top:20px;
  max-width:640px;
  padding:12px 16px;
  border-left:3px solid var(--yellow);
  background:var(--yellow-soft);
  border-radius:0 10px 10px 0;
  font-size:13.5px;
  color:#C9CDA0;
}

.game-card{
  margin-top:44px;
  padding:0;
  overflow:hidden;
  display:grid;
  grid-template-columns:55fr 45fr;
}
.game-card::before{content:none}

.game-media{
  position:relative;
  aspect-ratio:16/9;
  background:#080C15;
  border-right:1px solid rgba(242,245,63,.14);
  display:grid;
  place-items:center;
}
.game-media-inner{display:flex;flex-direction:column;align-items:center}
.game-media-inner img{height:64px;width:auto;opacity:.35}
.game-media-text{
  font-family:var(--font-pixel);
  font-size:9px;
  color:rgba(242,245,63,.5);
  margin-top:18px;
  text-align:center;
  line-height:2;
}
.pxc{position:absolute;width:14px;height:14px;opacity:.5;pointer-events:none}
.pxc-tl{top:12px;left:12px;border-top:2px solid var(--yellow);border-left:2px solid var(--yellow)}
.pxc-tr{top:12px;right:12px;border-top:2px solid var(--yellow);border-right:2px solid var(--yellow)}
.pxc-bl{bottom:12px;left:12px;border-bottom:2px solid var(--yellow);border-left:2px solid var(--yellow)}
.pxc-br{bottom:12px;right:12px;border-bottom:2px solid var(--yellow);border-right:2px solid var(--yellow)}

.game-body{padding:32px}
.game-status{
  display:inline-block;
  font-family:var(--font-pixel);
  font-size:8px;
  color:var(--yellow);
  border:1px solid rgba(242,245,63,.4);
  padding:6px 10px;
  border-radius:6px;
}
.game-title{
  font-family:var(--font-display);
  font-size:1.35rem;
  margin-top:16px;
}
.game-title-sub{
  color:var(--text-2);
  font-weight:400;
  font-size:.85em;
}
.game-desc{font-size:14.5px;margin-top:12px}
.game-card .chips{margin-top:18px}
.game-actions{
  margin-top:26px;
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

.next-slot{
  margin-top:22px;
  border:1px dashed rgba(242,245,63,.25);
  border-radius:14px;
  padding:30px;
  text-align:center;
  background:transparent;
}
.next-slot-head{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--text-2);
}
.next-slot-copy{
  font-size:14px;
  color:var(--text-2);
  margin-top:8px;
}

/* ===== PROJECTS ===== */
.case-list{
  display:flex;
  flex-direction:column;
  gap:22px;
  margin-top:44px;
}
.case-card{
  display:grid;
  grid-template-columns:34fr 66fr;
  gap:26px;
  align-items:center;
}
.case-media{
  aspect-ratio:16/10;
  border:1px dashed rgba(20,194,194,.35);
  border-radius:10px;
  background:#0A121F;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  color:var(--teal);
}
.case-media svg{opacity:.6}
.case-media-text{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--text-2);
  margin-top:10px;
}
.case-client{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--cyan);
}
.case-title{
  font-family:var(--font-display);
  font-size:1.2rem;
  margin-top:8px;
}
.field-exp{
  margin-top:26px;
  padding:26px 28px;
  border:1px solid var(--line);
  border-radius:14px;
  background:linear-gradient(90deg,rgba(20,194,194,.07),transparent 65%);
}
.field-exp-head{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--teal);
}
.field-exp-copy{
  margin-top:10px;
  font-size:14.5px;
  max-width:780px;
}
.field-exp .chips{margin-top:16px}

.case-desc{font-size:14.5px;margin-top:10px}
.case-tasks{margin-top:14px;display:grid;gap:7px}
.case-tasks li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text-1);
  line-height:1.6;
}
.case-tasks li::before{
  content:"▸";
  position:absolute;
  left:0;
  top:0;
  color:var(--teal);
}
.case-body .chips{margin-top:18px}
.case-slot{
  border:1px dashed rgba(20,194,194,.3);
  border-radius:14px;
  padding:28px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-2);
}

/* ===== DOWNLOADS ===== */
.downloads{border-top:1px solid var(--line-soft)}
.dl-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
  margin-top:44px;
}
.dl-card{display:flex;flex-direction:column}
.dl-head{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
.dl-title{
  font-family:var(--font-display);
  font-size:1.15rem;
}
.dl-version{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  padding:2px 9px;
  border-radius:999px;
  border:1px solid rgba(46,230,224,.35);
  color:var(--cyan);
  background:transparent;
}
.dl-tagline{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--teal);
  margin-top:8px;
}
.dl-desc{
  font-size:14.5px;
  margin-top:12px;
}
.dl-card .chips{margin-top:18px}
.dl-meta{
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--text-2);
  margin-top:18px;
}
.dl-actions{
  margin-top:auto;
  padding-top:18px;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:12px;
}
.dl-actions .btn{width:100%;justify-content:center}
.dl-actions .btn-primary:hover .arr{transform:translateY(3px)}
.dl-notes{
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--cyan);
  transition:opacity .2s;
}
.dl-notes:hover{opacity:.72}
.dl-fineprint{
  margin-top:26px;
  max-width:860px;
  font-size:12.5px;
  line-height:1.8;
  color:var(--text-2);
}

/* ===== ABOUT ===== */
.about{
  background:var(--bg-1);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.about-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:56px;
  align-items:center;
}
.about-visual{
  position:relative;
  aspect-ratio:1/1.05;
  display:grid;
  place-items:center;
  align-content:center;
}
.about-glow{
  position:absolute;
  z-index:0;
  top:50%;left:50%;
  width:88%;
  aspect-ratio:1;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(20,194,194,.16),transparent 65%);
  pointer-events:none;
}
.about-mark,.about-name,.about-domain{position:relative;z-index:1}
.about-mark{
  height:150px;width:auto;
  filter:drop-shadow(0 0 24px rgba(46,230,224,.35));
}
.about-name{height:18px;width:auto;margin-top:26px}
.about-domain{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.25em;
  color:var(--text-2);
  margin-top:14px;
}

.about-p{font-size:15px;margin-top:22px}
.about-p + .about-p{margin-top:14px}

.facts{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
  margin-top:30px;
}
.fact-value{
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.5rem;
  color:var(--cyan);
  line-height:1.2;
}
.fact-label{
  font-size:13px;
  color:var(--text-2);
  margin-top:4px;
  line-height:1.5;
}
.skill-tags{margin-top:28px}
.signature{
  margin-top:26px;
  font-size:13.5px;
  color:var(--text-2);
}
.signature span{color:var(--text-1)}

/* ===== CONTACT ===== */
.contact-grid{
  display:grid;
  grid-template-columns:36fr 64fr;
  gap:28px;
  margin-top:44px;
  align-items:start;
}
.info-row{margin-bottom:22px}
.info-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--text-2);
}
.info-email{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
.info-email a{
  color:var(--cyan);
  font-size:15.5px;
}
.info-email a:hover{text-decoration:underline}
.copy-btn{
  border:1px solid var(--line);
  border-radius:8px;
  padding:6px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--text-1);
  transition:border-color .2s,color .2s;
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.info-value{color:var(--text-0)}
.info-value-soft{color:var(--text-1)}
.info-link{color:var(--cyan);font-size:15px;word-break:break-all}
.info-link:hover{text-decoration:underline}
.info-divider{
  border:0;
  border-top:1px solid var(--line-soft);
  margin:24px 0;
}
.info-note{font-size:13px;color:var(--text-2)}

.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-bottom:16px;
}
.field{margin-bottom:16px}
.form-row .field{margin-bottom:0}
.field label{
  display:block;
  font-size:13px;
  color:var(--text-1);
  margin-bottom:6px;
}
.req{color:var(--cyan)}
.field input,
.field textarea{
  width:100%;
  background:#0B1320;
  border:1px solid rgba(56,189,197,.22);
  border-radius:10px;
  padding:13px 15px;
  color:var(--text-0);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.6;
  transition:border-color .2s,box-shadow .2s;
}
.field textarea{resize:vertical;min-height:120px}
.field input::placeholder,
.field textarea::placeholder{color:var(--text-2)}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(46,230,224,.13);
}
.field-error input,
.field-error textarea{border-color:#FF8A8A}
.field-msg{
  font-size:12.5px;
  color:#FF8A8A;
  margin-top:5px;
}
.form-note{
  font-size:12.5px;
  color:var(--text-2);
  margin-top:12px;
  text-align:center;
}

/* ===== FOOTER ===== */
.site-footer{
  background:#05080F;
  border-top:1px solid var(--line-soft);
  padding-block:56px 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand img{height:24px;width:auto}
.footer-name{height:12px}
.footer-about{
  font-size:13.5px;
  color:var(--text-2);
  max-width:30em;
  margin-top:16px;
}
.footer-head{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--text-2);
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-top:16px;
  font-size:13.5px;
  color:var(--text-1);
}
.footer-links a{transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
.footer-mail{color:var(--cyan)}
.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--line-soft);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  font-size:12px;
  color:var(--text-2);
}

/* ===== REVEAL ===== */
.js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .65s var(--ease),transform .65s var(--ease);
}
.js .reveal.in{opacity:1;transform:none}

/* ===== RESPONSIVE ===== */
@media (max-width:900px){
  .svc-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}

  .game-card{grid-template-columns:1fr}
  .game-media{border-right:0;border-bottom:1px solid rgba(242,245,63,.14)}

  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-visual{order:-1;max-width:300px;margin-inline:auto;width:100%}

  .contact-grid{grid-template-columns:1fr}
}

@media (max-width:1000px){
  .nav-desk,.header-inner > .btn-nav{display:none}
  .nav-toggle{display:block}
}

@media (max-width:768px){
  .binary{display:none}
  .tracks-grid{grid-template-columns:1fr}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .case-card{grid-template-columns:1fr;gap:22px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
}

@media (max-width:640px){
  .form-row{grid-template-columns:1fr}
  .form-row .field{margin-bottom:16px}
  .form-row .field:last-child{margin-bottom:0}
  .game-body{padding:26px 22px}
}

@media (max-width:480px){
  .process-grid{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr;gap:14px}
  .hero-cta{flex-direction:column;align-items:center}
  .hero-cta .btn{width:100%;max-width:320px;justify-content:center}
  .game-actions .btn{width:100%;justify-content:center}
}

/* ===== MOTION PREFERENCES ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .scroll-cue{display:none}
  .js .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:.001ms;animation-iteration-count:1;transition-duration:.001ms}
}

/* ===== FORM SUBMIT STATES ===== */
.hp{
  position:absolute;
  left:-9999px;
  width:1px;
  height:1px;
  opacity:0;
  pointer-events:none;
}
.btn-block[disabled]{opacity:.6;cursor:progress}
.form-note-error{color:#FF8A8A}
.form-success{text-align:center;padding:40px 12px}
.form-success-title{
  font-family:var(--font-display);
  font-size:1.3rem;
  font-weight:600;
  color:var(--cyan);
}
.form-success-copy{margin-top:12px;font-size:14.5px;color:var(--text-1);line-height:1.8}

/* Store entry in the free utilities section. */
.store-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:32px;padding:28px 30px;border:1px solid var(--line);border-radius:12px;background:var(--bg-2)}
.store-banner h3{font-size:20px;margin:8px 0}
.store-banner p:not(.eyebrow){font-size:14px}
.store-banner .btn{flex-shrink:0}

@media(max-width:640px){.store-banner{flex-direction:column;align-items:flex-start;padding:24px}}

/* Shared navigation and accessibility refinements. */
[hidden]{display:none!important}
.site-header{background:rgba(7,11,20,.88);backdrop-filter:blur(14px);border-bottom-color:var(--line-soft)}
.nav-desk{gap:18px}
.nav-link{font-family:var(--font-body);font-size:14px;min-height:44px;display:inline-flex;align-items:center;white-space:nowrap}
.nav-link::after{bottom:2px}
.brand{min-height:44px;flex-shrink:0}
.btn-nav{min-height:44px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}
.nav-toggle{width:44px;height:44px;padding:11px;margin-right:-11px;flex-shrink:0}
.mobile-menu{padding:72px 24px 28px;overflow-y:auto;overscroll-behavior:contain;align-items:flex-start}
.mobile-nav{width:min(100%,380px);gap:8px;margin:auto;align-items:stretch}
.mobile-nav .nav-link{padding:9px 16px;min-height:48px;font-size:20px;border-radius:8px;justify-content:center}
.mobile-nav .nav-link.active{color:var(--cyan);background:rgba(20,194,194,.08)}
.mobile-nav .nav-link-game.active{color:var(--yellow);background:var(--yellow-soft)}
.mobile-nav .nav-link::after{display:none}
.menu-close{top:12px;right:16px;width:44px;height:44px;display:grid;place-items:center;padding:10px}
.no-script-nav{margin-top:70px;display:flex;justify-content:center;flex-wrap:wrap;gap:12px;padding:16px}
.no-script-nav a{color:var(--cyan);padding:8px}
.hero{min-height:min(820px,100svh);padding:110px 0 105px}
.hero-inner{padding-top:0}
.hero-sub{max-width:39em}
.hero-title-alt{font-size:.52em}
.btn-secondary{border-color:rgba(46,230,224,.55);color:var(--cyan);background:rgba(7,11,20,.6)}
.btn-secondary:hover{background:rgba(20,194,194,.12);border-color:var(--cyan)}
.tracks-intro{font-size:clamp(20px,2.3vw,28px);line-height:1.5}
.tile{display:flex;flex-direction:column;align-items:flex-start}
.tile-copy{flex:1}
.tile-link{min-height:44px;display:inline-flex;align-items:center;gap:8px;font-family:var(--font-body);font-size:14px}
.download-help{margin-top:24px;border:1px solid var(--line);border-radius:10px;padding:4px 20px;font-size:13px}
.download-help summary{cursor:pointer;padding:12px 0;color:var(--text-1);min-height:44px}
.download-help p{padding:4px 0 18px;line-height:1.9}
.download-help summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.footer-links a{display:inline-flex;align-items:center;min-height:36px}
.footer-links a[aria-current="page"]{color:var(--cyan)}
.back-top{margin-right:auto;color:var(--text-1);display:inline-flex;align-items:center;min-height:44px}
.footer-bottom{align-items:center;gap:12px 24px}
.form-success:focus{outline:2px solid var(--cyan);outline-offset:6px;border-radius:8px}
.info-email{flex-wrap:wrap}
@media(max-width:1000px){.header-inner{gap:18px}}
@media(max-width:900px){.tracks-grid{grid-template-columns:1fr}.tile{padding:24px}.tile-copy{max-width:42em}}
@media(max-width:480px){.hero{padding:105px 0 80px;min-height:650px}.hero-eyebrow{font-size:10px;letter-spacing:.1em}.hero-sub br{display:none}.hero-cta{margin-top:25px;gap:10px}.footer-bottom{flex-direction:column;align-items:flex-start}}

/* ===== LANGUAGE SWITCH (i18n.js) ===== */
html:not([lang="ko"]) body{word-break:normal}
html[lang="ja"]{
  --font-body:'Pretendard Variable',Pretendard,'Noto Sans JP','Noto Sans KR',-apple-system,BlinkMacSystemFont,'Yu Gothic UI','Meiryo',sans-serif;
  --font-display:'Chakra Petch','Pretendard Variable','Noto Sans JP','Noto Sans KR',sans-serif;
}
.lang-switch{position:relative;flex-shrink:0}
.lang-btn{
  display:inline-flex;align-items:center;gap:6px;
  min-height:36px;padding:6px 10px;
  border:1px solid var(--line);border-radius:8px;
  background:rgba(7,11,20,.35);color:var(--text-1);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;line-height:1;
  cursor:pointer;
  transition:color .2s,border-color .2s,background-color .2s;
}
.lang-btn:hover,.lang-btn[aria-expanded="true"]{color:var(--cyan);border-color:rgba(20,194,194,.5)}
.lang-btn svg{flex-shrink:0}
.lang-caret{transition:transform .2s var(--ease)}
.lang-btn[aria-expanded="true"] .lang-caret{transform:rotate(180deg)}
.lang-menu{
  position:absolute;right:0;top:calc(100% + 8px);z-index:130;
  min-width:150px;padding:6px;
  display:grid;gap:2px;
  border:1px solid var(--line);border-radius:10px;
  background:rgba(10,16,28,.97);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 18px 40px -16px rgba(0,0,0,.7);
}
.lang-menu[hidden]{display:none}
.lang-option{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  width:100%;min-height:40px;padding:8px 12px;
  border:0;border-radius:7px;background:none;
  font-family:var(--font-body);font-size:14px;color:var(--text-1);text-align:left;
  cursor:pointer;
  transition:background-color .15s,color .15s;
}
.lang-option:hover{background:rgba(20,194,194,.1);color:var(--text-0)}
.lang-option[aria-pressed="true"]{color:var(--cyan)}
.lang-option[aria-pressed="true"]::after{content:"✓";font-family:var(--font-mono);font-size:12px}
.games-page .lang-btn:hover,.games-page .lang-btn[aria-expanded="true"],.games-page .lang-option[aria-pressed="true"]{color:var(--yellow)}
.games-page .lang-btn:hover,.games-page .lang-btn[aria-expanded="true"]{border-color:rgba(242,245,63,.35)}
.mobile-lang{
  display:grid;grid-template-columns:repeat(3,1fr);gap:6px;
  width:100%;margin-top:14px;padding-top:14px;border-top:1px solid var(--line);
}
.mobile-lang .lang-option{justify-content:center;text-align:center;min-height:44px;border:1px solid var(--line);border-radius:8px}
.mobile-lang .lang-option::after{content:none}
.mobile-lang .lang-option[aria-pressed="true"]{border-color:rgba(20,194,194,.5);background:rgba(20,194,194,.08)}
.games-page .mobile-lang .lang-option[aria-pressed="true"]{border-color:rgba(242,245,63,.35);background:var(--yellow-soft)}
@media(max-width:480px){
  .lang-btn{padding:6px 8px;gap:0}
  .lang-btn .lang-current,.lang-btn .lang-caret{display:none}
}