:root{color-scheme:dark;--bg:#101113;--panel:#171a1d;--text:#f2f3ee;--muted:#a1a6a8;--lime:#c8ff69}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Noto Sans KR","Apple SD Gothic Neo",system-ui,sans-serif}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--lime);outline-offset:6px}
.page-shell{min-height:100svh;overflow:hidden;background:radial-gradient(circle at 50% 43%,#293027 0,transparent 34%),linear-gradient(180deg,#101113 0%,#141819 60%,#101113 100%)}
.site-header,.site-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1480px;margin:auto;padding:24px clamp(24px,5vw,72px)}
.site-header{border-bottom:1px solid #ffffff12}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:25px;font-weight:900;letter-spacing:-.07em}
.brand svg{width:34px;height:34px;color:var(--lime)}
.header-note,.eyebrow{font-size:11px;font-weight:700;letter-spacing:.22em;color:var(--lime)}
.header-note{color:#9da59b}
.hero{display:flex;flex-direction:column;align-items:center;max-width:1000px;margin:auto;padding:clamp(44px,6vh,70px) 22px 96px;text-align:center}
.hero-copy{position:relative;z-index:1}
.eyebrow{margin:0 0 13px}
h1{margin:0;font-size:clamp(64px,10vw,118px);font-weight:900;line-height:1.05;letter-spacing:-.085em}
.hero-intro{margin:23px 0 0;color:#c1c6c1;font-size:clamp(15px,2.1vw,19px);line-height:1.8;word-break:keep-all}
.card-stage{position:relative;display:grid;place-items:center;width:min(100%,680px);height:clamp(400px,52vw,535px);margin:50px auto 48px;perspective:1200px}
.stage-glow{position:absolute;width:440px;height:440px;max-width:78vw;border-radius:50%;background:radial-gradient(circle,#c8ff6927 0,#c8ff6910 34%,transparent 68%);filter:blur(22px)}
.orbit{position:absolute;border:1px solid #c8ff692b;border-radius:50%;pointer-events:none}
.orbit-one{width:min(590px,93%);height:198px;transform:rotate(-24deg)}
.orbit-two{width:min(465px,75%);height:360px;transform:rotate(37deg);opacity:.55}
/* Spin around the upright world axis; tilt both faces together as one card. */
.card-spin{position:relative;width:clamp(240px,32vw,310px);aspect-ratio:5/7;transform-style:preserve-3d;animation:turn-card 8s linear infinite}
.card-tilt{position:absolute;inset:0;transform:rotateZ(19deg);transform-style:preserve-3d}
.card-face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:24px;overflow:hidden;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:1px solid #8b939c75;box-shadow:10px 24px 28px #000a}
.card-back{transform:translateZ(.5px);gap:14px;background:radial-gradient(ellipse at 40% 25%,#59616c33,transparent 65%),repeating-linear-gradient(135deg,#a5aab509 0 1px,transparent 1px 13px),#13171e;color:#c1c6cf}
.back-inner-frame,.front-inner-frame{position:absolute;inset:4%;border:1px solid #aab1bd26;border-radius:18px;pointer-events:none}
.back-symbol{width:25%;height:auto;filter:drop-shadow(0 0 12px #b7bcc62b)}
.card-back strong{font-size:13px;letter-spacing:4px;font-weight:600}
.card-back span{font-size:10px;letter-spacing:.04em;color:#7d8591}
.card-front{transform:rotateY(180deg) translateZ(.5px);background:radial-gradient(ellipse at 51% 45%,#353d2a 0,transparent 54%),repeating-linear-gradient(135deg,#c8ff6908 0 1px,transparent 1px 13px),#171b1a;border-color:#9bb478}
.front-inner-frame{border-color:#c8ff6940}
.front-label{position:absolute;top:9%;font-size:10px;letter-spacing:.2em;color:#a8be8c}
.card-front strong{font-family:Georgia,serif;font-size:clamp(160px,21vw,220px);line-height:1;color:var(--lime);font-weight:400;text-shadow:0 0 44px #c8ff6966;transform:translateY(-4px)}
.front-caption{position:absolute;bottom:10%;font-size:12px;color:#d4dfcb;letter-spacing:.01em}
@keyframes turn-card{from{transform:rotateY(0deg)}to{transform:rotateY(360deg)}}
.hero-action{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center}
h2{margin:0;font-size:clamp(26px,4.6vw,42px);line-height:1.32;letter-spacing:-.06em;word-break:keep-all}
.hero-action p{max-width:560px;margin:18px 0 30px;color:var(--muted);font-size:15px;line-height:1.8;word-break:keep-all}
.play-button{display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:62px;padding:0 32px;background:var(--lime);border-radius:12px;color:#151915;font-size:16px;font-weight:800;box-shadow:0 12px 42px #c8ff6926;transition:transform .2s,box-shadow .2s}
.play-button:hover{transform:translateY(-3px);box-shadow:0 17px 48px #c8ff6944}
.play-button span{font-size:22px;font-weight:400}
.site-footer{border-top:1px solid #ffffff12;color:#8e9490;font-size:12px}
.site-footer a:hover{color:var(--lime)}
@media(max-width:620px){.site-header,.site-footer{padding:20px 22px}.brand{font-size:22px}.brand svg{width:30px;height:30px}.header-note{display:none}.hero{padding:54px 20px 72px}.hero-intro{margin-top:19px}.card-stage{height:430px;margin:52px auto 56px}.card-spin{width:min(58vw,252px)}.card-face{border-radius:18px}.back-inner-frame,.front-inner-frame{border-radius:14px}.hero-action p{margin:14px 0 26px}.play-button{width:min(100%,350px)}}
@media(max-width:380px){.card-stage{height:375px}.card-spin{width:220px}.hero-intro{font-size:14px}.hero-action p{font-size:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card-spin{animation:none;transform:rotateY(180deg)}.play-button{transition:none}.play-button:hover{transform:none}}