*{box-sizing:border-box}
html,body{margin:0}
body{background:#F7F8FA;color:#191F28;font-family:'Pretendard Variable',Pretendard,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:#0072F5;text-decoration:none}a:hover{color:#0058CC}
button{cursor:pointer}
button:focus-visible,a:focus-visible{outline:2px solid #0072F5;outline-offset:2px}
.num{font-family:'JetBrains Mono','Pretendard Variable',monospace;font-variant-numeric:tabular-nums}
[hidden]{display:none!important}

/* 데모 단계 표시줄 */
.demo-bar{position:sticky;top:0;z-index:20;height:52px;display:flex;align-items:center;gap:12px;padding:0 20px;background:#191F28;color:#FFFFFF;font-size:13px}
.demo-tag{font-weight:700;color:#191F28;background:#FFD66B;padding:2px 8px;border-radius:6px;font-size:12px}
.demo-title{font-weight:700;white-space:nowrap}
.demo-steps{list-style:none;margin:0;padding:0;display:flex;gap:4px;overflow-x:auto;flex:1;scrollbar-width:none}
.demo-steps::-webkit-scrollbar{display:none}
.demo-steps button{height:32px;padding:0 10px;border-radius:8px;border:0;background:transparent;color:#B0B8C1;font:inherit;font-weight:600;white-space:nowrap}
.demo-steps button:hover{color:#FFFFFF;background:rgba(255,255,255,.08)}
.demo-steps button.done{color:#8CBEFF}
.demo-steps button.done::before{content:"✓ "}
.demo-steps button.now{color:#FFFFFF;background:#0072F5}
.demo-reset{height:32px;padding:0 12px;border-radius:8px;border:1px solid rgba(255,255,255,.24);background:transparent;color:#FFFFFF;font:inherit;font-weight:600;white-space:nowrap}

/* PC 화면 */
.pc-wrap{min-height:calc(100vh - 52px);display:flex;background:#F7F8FA;color:#191F28;font-size:14px;word-break:keep-all;min-width:1200px}
.screen.pc{overflow-x:auto}

/* 휴대폰 화면 */
.phone-stage{min-height:calc(100vh - 52px);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px 16px;background:#E9ECF1}
.phone-cap{margin:0;font-size:13px;font-weight:600;color:#4E5968}
.phone-frame{width:390px;height:844px;border-radius:44px;overflow:hidden;box-shadow:0 0 0 10px #191F28,0 24px 48px rgba(16,24,40,.25);background:#FFFFFF}
@media (max-width:520px){
  .phone-stage{padding:0;background:#FFFFFF;justify-content:flex-start}
  .phone-cap{display:none}
  .phone-frame{width:100%;height:auto;min-height:calc(100vh - 52px);border-radius:0;box-shadow:none}
  .phone-frame>div{width:100%!important;height:auto!important;min-height:calc(100vh - 52px)}
}

/* 시작 안내 */
.intro{position:fixed;inset:52px 0 0 0;z-index:15;background:rgba(25,31,40,.55);display:flex;align-items:center;justify-content:center;padding:20px}
.intro-card{width:100%;max-width:520px;background:#FFFFFF;border-radius:24px;padding:36px;display:flex;flex-direction:column;gap:16px;word-break:keep-all;box-shadow:0 24px 48px rgba(16,24,40,.25)}
.intro-brand{font-size:13px;font-weight:600;color:#667085}
.intro-brand b{font-family:Inter,sans-serif;letter-spacing:.06em;color:#191F28;margin-right:4px}
.intro-card h1{margin:0;font-size:28px;line-height:1.35;letter-spacing:-.02em}
.intro-card p{margin:0;font-size:15px;line-height:1.7;color:#4E5968}
.intro-card ul{margin:0;padding-left:18px;font-size:14px;line-height:1.8;color:#667085}
.intro-go{height:52px;border:0;border-radius:14px;background:#0072F5;color:#FFFFFF;font:inherit;font-size:16px;font-weight:700}
.intro-go:hover{background:#0058CC}
.intro-link{text-align:center;font-size:14px;font-weight:600}

/* 알림 */
.toast{position:fixed;left:50%;bottom:32px;z-index:30;transform:translate(-50%,16px);opacity:0;pointer-events:none;max-width:calc(100vw - 32px);padding:14px 20px;border-radius:14px;background:#191F28;color:#FFFFFF;font-size:14px;font-weight:600;box-shadow:0 12px 32px rgba(16,24,40,.3);transition:opacity .2s,transform .2s;word-break:keep-all}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* 다음에 누를 버튼 강조 */
.next-hint{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(0,114,245,.45)}50%{box-shadow:0 0 0 6px rgba(0,114,245,0)}}
@media (prefers-reduced-motion:reduce){.next-hint{animation:none;box-shadow:0 0 0 3px rgba(0,114,245,.35)}.toast{transition:none}}