/* 딸깍 서바이벌 / 10key Survival game page. Rebuilt 2026-10-24 (owner: less generic, pre-registration visible at a glance).
   One dark night from top to bottom, real game footage and screenshots, and the pre-registration form in the first screen.
   Also styles /10key/prereg/ (confirm / unsubscribe) and /10key/get/ (the one download link of the launch mail).
   Loaded after brand-site.css, which only supplies the logo lockup and the skip link. */

:root {
  --tk-night: #0b0f2a;
  --tk-night-2: #12173a;
  --tk-night-3: #181f4a;
  --tk-night-deep: #070a1e;
  --tk-duck: #f5b731;
  --tk-duck-soft: #f8d27a;
  --tk-crt: #2a4fc4;
  --tk-key-gold: #f2b63c;
  --tk-key-side: #b8821f;
  --tk-cream: #f3ecdc;
  --tk-text: rgba(255, 255, 255, .92);
  --tk-text-2: rgba(255, 255, 255, .72);
  --tk-text-3: rgba(255, 255, 255, .56);
  --tk-edge: rgba(255, 255, 255, .12);
  --tk-edge-2: rgba(255, 255, 255, .22);
  --tk-ok: #7ee2a8;
  --tk-err: #ff9d8a;
  --tk-ease: cubic-bezier(.2, .7, .2, 1);
  --tk-font: "Montserrat", -apple-system, "Apple SD Gothic Neo", "Hiragino Sans", "Noto Sans KR", "Noto Sans JP", sans-serif;
  --tk-gutter: clamp(18px, 4vw, 40px);
  --tk-bar: 60px;
}

html { color-scheme: dark; scroll-behavior: smooth; background: var(--tk-night-deep); }
body.tk-page {
  min-width: 0;
  margin: 0;
  color: var(--tk-text);
  background: var(--tk-night);
  font-family: var(--tk-font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body.tk-page::before { display: none; }
body.tk-page main { position: relative; z-index: 1; }
body.tk-page :focus-visible { outline: 3px solid var(--tk-duck); outline-offset: 3px; }
[id] { scroll-margin-top: calc(var(--tk-bar) + 16px); }
.tk-wrap { width: min(1160px, 100% - 2 * var(--tk-gutter)); margin-inline: auto; }
.tk-page a { color: inherit; }

/* ---------- header (same lockup as the home) ---------- */
.tk-page .site-header {
  position: fixed; top: 0; right: 0; left: 0; z-index: 100;
  border: 0; color: #fff;
  background: rgba(11, 15, 42, .9);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .08);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
}
.tk-page .header-inner { display: flex; min-height: var(--tk-bar); align-items: center; justify-content: space-between; gap: 16px; }
.tk-page .brand-lockup { height: 44px; min-height: 44px; gap: 9px; color: inherit; }
.tk-page .brand-lockup:hover { transform: none; }
.tk-page .brand-lockup .brand-duck-image { width: 30px; height: 30px; }
.tk-page .brand-lockup .brand-wordmark-image { width: 100px; filter: brightness(0) invert(1); }
.tk-nav { display: flex; align-items: center; gap: 4px; }
.tk-nav-link {
  display: inline-flex; min-height: 44px; align-items: center; padding: 0 12px; border-radius: 8px;
  color: var(--tk-text-2); font-size: .86rem; font-weight: 600; text-decoration: none;
  transition: color 160ms var(--tk-ease), background-color 160ms var(--tk-ease);
}
.tk-nav-link:hover, .tk-nav-link:focus-visible { color: #fff; background: rgba(255, 255, 255, .1); }
.tk-nav-cta { color: var(--tk-night); background: var(--tk-duck); }
.tk-nav-cta:hover, .tk-nav-cta:focus-visible { color: var(--tk-night); background: var(--tk-duck-soft); }
.tk-lang { display: inline-flex; margin-left: 6px; padding: 3px; border: 1px solid var(--tk-edge-2); border-radius: 999px; }
.tk-lang a {
  display: inline-flex; min-width: 40px; min-height: 36px; align-items: center; justify-content: center; border-radius: 999px;
  color: var(--tk-text-2); font-size: .78rem; font-weight: 700; letter-spacing: .06em; text-decoration: none;
}
.tk-lang a:hover { color: #fff; }
.tk-lang a[aria-current="page"] { color: var(--tk-night); background: #fff; }

/* ---------- keycap button (pressable, the game's own look) ---------- */
.tk-key {
  --btn: var(--tk-key-gold); --btn-side: var(--tk-key-side); --btn-ink: #2a1c05; --depth: 6px;
  position: relative; display: inline-flex; min-height: 56px; margin: 0 0 var(--depth); padding: 0;
  border: 0; border-radius: 14px; color: var(--btn-ink); background: none;
  font: inherit; font-size: 1rem; font-weight: 800; letter-spacing: -.01em; text-decoration: none;
  cursor: pointer; -webkit-tap-highlight-color: transparent; user-select: none; touch-action: manipulation;
}
.tk-key-face {
  display: inline-flex; width: 100%; min-height: inherit; align-items: center; justify-content: center; gap: 10px;
  padding: 0 26px; border-radius: inherit; white-space: nowrap;
  background: linear-gradient(180deg, rgba(255, 255, 255, .34), rgba(255, 255, 255, .06) 40%, rgba(0, 0, 0, .04)), var(--btn);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55), inset 0 0 0 1px rgba(255, 255, 255, .18),
    0 var(--depth) 0 var(--btn-side), 0 calc(var(--depth) + 2px) 6px rgba(0, 0, 0, .28);
  transition: transform 110ms var(--tk-ease), box-shadow 110ms var(--tk-ease), filter 160ms var(--tk-ease);
}
.tk-key:hover .tk-key-face { filter: brightness(1.05); }
.tk-key:active .tk-key-face, .tk-key[aria-busy="true"] .tk-key-face {
  transform: translateY(calc(var(--depth) - 1px));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4), 0 1px 0 var(--btn-side), 0 2px 4px rgba(0, 0, 0, .25);
}
.tk-key[disabled] { cursor: progress; }
.tk-key-ghost { --btn: #e9ebf7; --btn-side: #9aa0c3; --btn-ink: var(--tk-night); }

/* ---------- first screen: title, pre-registration, real gameplay ---------- */
.tk-hero {
  position: relative;
  padding: calc(var(--tk-bar) + clamp(28px, 5vw, 64px)) 0 clamp(48px, 7vw, 88px);
  overflow: clip;
  background:
    radial-gradient(42% 60% at 78% 46%, rgba(42, 79, 196, .42), transparent 70%),
    radial-gradient(30% 40% at 74% 70%, rgba(245, 183, 49, .14), transparent 72%),
    linear-gradient(180deg, #0b0f2a 0%, #0e1334 60%, #0b0f2a 100%);
}
.tk-hero-grid {
  --tk-phone-w: clamp(220px, 24vw, 300px);
  display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: clamp(32px, 6vw, 88px);
}
.tk-hero-copy { min-width: 0; max-width: 36rem; }
.tk-kicker { margin: 0 0 18px; color: var(--tk-duck-soft); font-size: .86rem; font-weight: 700; letter-spacing: .02em; }
:lang(en) .tk-kicker { letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
#game-title { display: flex; flex-direction: column; margin: 0; color: #fff; line-height: 1.04; }
.tk-title-main { font-size: clamp(2.8rem, 6.4vw, 5rem); font-weight: 800; letter-spacing: -.045em; word-break: keep-all; text-shadow: 0 2px 40px rgba(42, 79, 196, .55); }
.tk-title-alt { margin-top: 12px; color: var(--tk-text-3); font-size: clamp(.92rem, 1.2vw, 1.05rem); font-weight: 700; letter-spacing: .1em; }
html:lang(ko) #game-title { flex-direction: column-reverse; }
html:lang(ko) .tk-title-alt { margin: 12px 0 0; }
html:lang(en) .tk-title-alt { margin: 12px 0 0; letter-spacing: .02em; }
.tk-lede { max-width: 31rem; margin: 22px 0 0; color: var(--tk-text-2); font-size: clamp(1.02rem, 1.3vw, 1.16rem); line-height: 1.7; word-break: keep-all; text-wrap: pretty; }

/* the pre-registration card */
.tk-prereg {
  margin-top: 30px; padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid rgba(245, 183, 49, .38); border-radius: 22px;
  background: linear-gradient(180deg, rgba(245, 183, 49, .10), rgba(245, 183, 49, .03) 60%), rgba(18, 23, 58, .82);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .35);
}
.tk-prereg-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; }
.tk-prereg h2 { margin: 0; color: #fff; font-size: 1.32rem; font-weight: 800; letter-spacing: -.02em; line-height: 1.3; word-break: keep-all; }
.tk-prereg-free { margin: 0; color: var(--tk-duck-soft); font-size: .84rem; font-weight: 700; }
.tk-prereg-sub { margin: 8px 0 18px; color: var(--tk-text-2); font-size: .95rem; line-height: 1.6; word-break: keep-all; }
.tk-form-row { display: flex; gap: 10px; }
.tk-field { position: relative; flex: 1 1 auto; min-width: 0; }
.tk-input {
  width: 100%; height: 56px; box-sizing: border-box; padding: 0 16px;
  border: 1px solid var(--tk-edge-2); border-radius: 14px; color: #fff; background: rgba(7, 10, 30, .72);
  font: inherit; font-size: 1rem; outline: none;
  transition: border-color 160ms var(--tk-ease), box-shadow 160ms var(--tk-ease);
}
.tk-input::placeholder { color: var(--tk-text-3); }
.tk-input:focus { border-color: var(--tk-duck); box-shadow: 0 0 0 3px rgba(245, 183, 49, .25); }
.tk-input[aria-invalid="true"] { border-color: var(--tk-err); }
.tk-form-row .tk-key { flex: none; }
.tk-consent { display: flex; gap: 10px; align-items: flex-start; margin: 14px 0 0; color: var(--tk-text-2); font-size: .85rem; line-height: 1.55; word-break: keep-all; cursor: pointer; }
.tk-consent input { flex: none; width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--tk-duck); cursor: pointer; }
.tk-consent a { color: #fff; text-underline-offset: 3px; }
.tk-hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.tk-status { min-height: 0; margin: 0; font-size: .92rem; font-weight: 600; line-height: 1.55; word-break: keep-all; }
.tk-status:not(:empty) { margin-top: 14px; padding: 12px 14px; border-radius: 12px; background: rgba(255, 255, 255, .06); }
.tk-status[data-tone="ok"] { color: var(--tk-ok); background: rgba(126, 226, 168, .1); }
.tk-status[data-tone="err"] { color: var(--tk-err); background: rgba(255, 157, 138, .1); }
.tk-prereg.is-done .tk-form-body { display: none; }
.tk-facts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 18px 0 0; padding: 16px 0 0; border-top: 1px solid var(--tk-edge); list-style: none; color: var(--tk-text-2); font-size: .86rem; }
.tk-facts li { display: inline-flex; align-items: center; gap: 8px; }
.tk-facts li::before { width: 6px; height: 6px; border-radius: 2px; content: ""; background: var(--tk-duck); }
.tk-facts b { color: #fff; font-weight: 700; }

/* phone with the real gameplay loop */
.tk-phone-figure { display: grid; justify-items: center; gap: 14px; margin: 0; }
.tk-phone { position: relative; width: var(--tk-phone-w); }
.tk-phone::before { position: absolute; inset: 8% -24% 2%; z-index: -1; content: ""; border-radius: 50%; background: radial-gradient(closest-side, rgba(42, 79, 196, .55), rgba(245, 183, 49, .1) 70%, transparent); filter: blur(22px); }
.tk-phone-shell {
  position: relative; display: block; aspect-ratio: 9 / 18; padding: 10px; overflow: hidden;
  border-radius: calc(var(--tk-phone-w) * .166); background: #0e1020;
  box-shadow: inset 0 0 0 1.5px #3a3d55, inset 0 0 0 5px #0b0c19, 0 2px 2px rgba(255, 255, 255, .22), 0 40px 80px rgba(0, 0, 0, .55);
}
.tk-phone-video { display: block; width: 100%; height: 100%; border-radius: calc(var(--tk-phone-w) * .133); background: #000; object-fit: contain; }
.tk-phone-island { position: absolute; top: 18px; left: 50%; z-index: 3; width: 32%; height: 24px; border-radius: 999px; background: #050610; transform: translateX(-50%); }
.tk-phone-home { position: absolute; bottom: 18px; left: 50%; z-index: 3; width: 36%; height: 4px; border-radius: 999px; background: rgba(255, 255, 255, .8); transform: translateX(-50%); }
.tk-phone-figure figcaption { display: flex; align-items: center; justify-content: center; gap: 12px; color: var(--tk-text-3); font-size: .8rem; text-align: center; }
.tk-video-toggle {
  display: inline-grid; width: 36px; height: 36px; flex: none; place-items: center; padding: 0;
  border: 1px solid var(--tk-edge-2); border-radius: 50%; color: #fff; background: rgba(255, 255, 255, .08); cursor: pointer;
}
.tk-video-toggle span { position: relative; display: block; width: 12px; height: 12px; }
.tk-video-toggle span::before, .tk-video-toggle span::after { position: absolute; top: 0; width: 4px; height: 12px; border-radius: 1px; content: ""; background: currentColor; }
.tk-video-toggle span::before { left: 1px; }
.tk-video-toggle span::after { right: 1px; }
.tk-video-toggle[data-state="paused"] span::before { left: 2px; width: 0; height: 0; border-radius: 0; border-top: 6px solid transparent; border-bottom: 6px solid transparent; border-left: 10px solid currentColor; background: transparent; }
.tk-video-toggle[data-state="paused"] span::after { display: none; }

/* ---------- sections ---------- */
.tk-section { padding: clamp(64px, 8vw, 104px) 0; }
.tk-section + .tk-section { border-top: 1px solid var(--tk-edge); }
.tk-h2 { margin: 0 0 clamp(28px, 4vw, 44px); color: #fff; font-size: clamp(1.7rem, 3.2vw, 2.5rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.18; word-break: keep-all; text-wrap: balance; }
.tk-h2 small { display: block; margin-top: 10px; color: var(--tk-text-2); font-size: clamp(.98rem, 1.3vw, 1.08rem); font-weight: 500; letter-spacing: 0; line-height: 1.6; }

/* how it plays: four real screenshots, numbered by the game's own keycaps */
.tk-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 28px); margin: 0; padding: 0; list-style: none; }
.tk-step { min-width: 0; }
.tk-step figure { position: relative; margin: 0 0 18px; }
.tk-step-shot { display: block; padding: 6px; border-radius: 30px; background: #0e1020; box-shadow: inset 0 0 0 1.5px #3a3d55, 0 24px 50px rgba(0, 0, 0, .4); }
.tk-step-shot img { display: block; width: 100%; height: auto; aspect-ratio: 600 / 1171; border-radius: 24px; background: #0b0c19; object-fit: cover; }
.tk-step-key { position: absolute; top: -18px; left: -12px; width: 64px; height: 64px; transform: rotate(-8deg); pointer-events: none; }
.tk-step-key img { position: absolute; inset: 0; display: block; width: 100%; height: 100%; }
.tk-step h3 { margin: 0 0 6px; color: #fff; font-size: 1.08rem; font-weight: 800; letter-spacing: -.02em; line-height: 1.35; word-break: keep-all; }
.tk-step p { margin: 0; color: var(--tk-text-2); font-size: .93rem; line-height: 1.65; word-break: keep-all; text-wrap: pretty; }

/* the facts, as a plain sheet */
.tk-sheet { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; border: 1px solid var(--tk-edge); border-radius: 20px; overflow: hidden; background: var(--tk-night-2); }
.tk-sheet div { padding: 22px 24px; border-right: 1px solid var(--tk-edge); border-bottom: 1px solid var(--tk-edge); }
.tk-sheet div:nth-child(3n) { border-right: 0; }
.tk-sheet div:nth-last-child(-n + 3) { border-bottom: 0; }
.tk-sheet dt { margin: 0 0 6px; color: var(--tk-text-3); font-size: .8rem; font-weight: 700; letter-spacing: .04em; }
.tk-sheet dd { margin: 0; color: #fff; font-size: 1.02rem; font-weight: 700; line-height: 1.5; word-break: keep-all; }
.tk-sheet dd span { display: block; margin-top: 2px; color: var(--tk-text-2); font-size: .88rem; font-weight: 500; }
.tk-sheet .is-key { background: rgba(245, 183, 49, .08); }
.tk-sheet .is-key dd { color: var(--tk-duck-soft); }

/* questions */
.tk-faq { display: grid; gap: 10px; max-width: 52rem; }
.tk-faq details { border: 1px solid var(--tk-edge); border-radius: 16px; background: var(--tk-night-2); }
.tk-faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; padding: 0 20px; color: #fff; font-weight: 700; line-height: 1.4; cursor: pointer; list-style: none; word-break: keep-all; }
.tk-faq summary::-webkit-details-marker { display: none; }
.tk-faq summary::after { flex: none; width: 10px; height: 10px; border-right: 2px solid var(--tk-text-2); border-bottom: 2px solid var(--tk-text-2); content: ""; transform: rotate(45deg) translate(-2px, -2px); transition: transform 160ms var(--tk-ease); }
.tk-faq details[open] summary::after { transform: rotate(225deg) translate(-2px, -2px); }
.tk-faq details p { margin: 0; padding: 0 20px 18px; color: var(--tk-text-2); font-size: .95rem; line-height: 1.7; word-break: keep-all; }

/* last call */
.tk-final { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); align-items: center; gap: clamp(28px, 5vw, 72px); }
.tk-final .tk-h2 { margin-bottom: 22px; }
.tk-keyart { margin: 0; overflow: hidden; border-radius: 24px; background: #0b0c19; box-shadow: 0 0 0 1px var(--tk-edge), 0 30px 80px rgba(0, 0, 0, .5); }
.tk-keyart img { display: block; width: 100%; height: auto; aspect-ratio: 960 / 469; }
.tk-final-links { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; }
.tk-text-link { color: var(--tk-text-2); font-size: .9rem; font-weight: 600; text-underline-offset: 4px; }
.tk-text-link:hover { color: #fff; }

/* ---------- small pages: /10key/prereg/ and /10key/get/ ---------- */
.tk-small { display: grid; min-height: 100vh; min-height: 100svh; place-items: center; padding: calc(var(--tk-bar) + 32px) 0 48px; box-sizing: border-box;
  background: radial-gradient(50% 50% at 50% 40%, rgba(42, 79, 196, .35), transparent 70%), var(--tk-night); }
.tk-card { width: min(520px, 100% - 2 * var(--tk-gutter)); padding: clamp(24px, 4vw, 36px); box-sizing: border-box; border: 1px solid var(--tk-edge); border-radius: 24px; background: rgba(18, 23, 58, .9); text-align: center; box-shadow: 0 30px 70px rgba(0, 0, 0, .4); }
.tk-card-key { display: block; width: 84px; height: 84px; margin: 0 auto 14px; position: relative; }
.tk-card-key img { position: absolute; inset: 0; width: 100%; height: 100%; }
.tk-card h1 { margin: 0 0 10px; color: #fff; font-size: clamp(1.5rem, 4vw, 1.9rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.25; word-break: keep-all; }
.tk-card p { margin: 0 0 12px; color: var(--tk-text-2); line-height: 1.7; word-break: keep-all; }
.tk-card .tk-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 22px; }
.tk-card .tk-store-note { margin-top: 18px; color: var(--tk-text-3); font-size: .84rem; }

/* ---------- footer ---------- */
.tk-footer { padding: 24px 0 36px; color: var(--tk-text-3); background: var(--tk-night-deep); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08); }
.tk-footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 32px; }
.tk-footer-links { display: flex; flex-wrap: wrap; gap: 0 26px; margin: 0; padding: 0; list-style: none; }
.tk-footer-links a { display: inline-flex; min-height: 44px; align-items: center; color: var(--tk-text-2); font-size: .86rem; font-weight: 600; text-decoration: none; }
.tk-footer-links a:hover, .tk-footer-links a:focus-visible { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.tk-footer small { font-size: .78rem; }

/* ---------- reveal on scroll (only when the script runs) ---------- */
.tk-js .tk-reveal { opacity: 0; transform: translateY(22px); transition: opacity 600ms var(--tk-ease), transform 600ms var(--tk-ease); transition-delay: calc(var(--i, 0) * 80ms); }
.tk-js .tk-reveal.is-in { opacity: 1; transform: none; }
.tk-flash { animation: tk-flash 1.2s var(--tk-ease); }
@keyframes tk-flash { 0% { box-shadow: 0 0 0 0 rgba(245, 183, 49, .7), 0 30px 70px rgba(0, 0, 0, .35); } 100% { box-shadow: 0 0 0 18px rgba(245, 183, 49, 0), 0 30px 70px rgba(0, 0, 0, .35); } }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .tk-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 40px; }
  .tk-sheet { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tk-sheet div:nth-child(3n) { border-right: 1px solid var(--tk-edge); }
  .tk-sheet div:nth-child(2n) { border-right: 0; }
  .tk-sheet div:nth-last-child(-n + 3) { border-bottom: 1px solid var(--tk-edge); }
  .tk-sheet div:nth-last-child(-n + 2) { border-bottom: 0; }
}
@media (max-width: 860px) {
  .tk-hero-grid { grid-template-columns: minmax(0, 1fr); --tk-phone-w: clamp(200px, 58vw, 260px); }
  .tk-hero-copy { max-width: none; }
  .tk-phone-figure { order: 2; }
  .tk-final { grid-template-columns: minmax(0, 1fr); }
  .tk-nav-link:not(.tk-nav-cta) { display: none; }
}
@media (max-width: 520px) {
  .tk-form-row { flex-direction: column; }
  .tk-form-row .tk-key { width: 100%; }
  .tk-steps { gap: 28px 14px; }
  .tk-step-key { width: 50px; height: 50px; top: -14px; left: -8px; }
  .tk-sheet { grid-template-columns: minmax(0, 1fr); }
  .tk-sheet div, .tk-sheet div:nth-child(3n), .tk-sheet div:nth-child(2n) { border-right: 0; border-bottom: 1px solid var(--tk-edge); }
  .tk-sheet div:last-child { border-bottom: 0; }
  .tk-page .brand-lockup .brand-wordmark-image { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tk-js .tk-reveal { opacity: 1; transform: none; transition: none; }
  .tk-flash { animation: none; }
}
.tk-page [hidden] { display: none !important; }