/* 데모 간 내비게이션 — F11 녹화용 */
.demo-nav {
    position: fixed;
    bottom: 70px;
    right: 24px;
    z-index: 9999;
    display: flex;
    gap: 10px;
    align-items: center;
    font-family: 'Pretendard', sans-serif;
}
.demo-nav a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.3px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.25s ease;
    opacity: 0.35;
}
.demo-nav a:hover,
.demo-nav a:focus-visible {
    opacity: 1;
    transform: translateY(-1px);
    outline: none;
}
.demo-nav .demo-nav-prev {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #f3f4f6;
}
.demo-nav .demo-nav-prev:hover {
    background: rgba(255, 255, 255, 0.95);
    color: #0a0a0f;
    border-color: transparent;
}
.demo-nav .demo-nav-next {
    background: rgba(251, 191, 36, 0.18);
    border: 1px solid rgba(251, 191, 36, 0.5);
    color: #fbbf24;
}
.demo-nav .demo-nav-next:hover {
    background: #fbbf24;
    color: #0a0a0f;
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(251, 191, 36, 0.4);
}
.demo-nav .k {
    font-size: 9px;
    opacity: 0.65;
    padding: 2px 5px;
    border: 1px solid currentColor;
    border-radius: 3px;
    margin-left: 4px;
}

/* 키보드 힌트 (시작 후 3초만 보였다가 사라짐) */
.demo-hint {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 9998;
    padding: 8px 14px;
    background: rgba(10, 14, 26, 0.85);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #fbbf24;
    font-family: 'Pretendard', sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    border-radius: 20px;
    backdrop-filter: blur(8px);
    animation: demoHintFade 5s ease forwards;
    pointer-events: none;
}
@keyframes demoHintFade {
    0%   { opacity: 0; transform: translateY(-6px); }
    10%  { opacity: 1; transform: translateY(0); }
    80%  { opacity: 1; }
    100% { opacity: 0; transform: translateY(-6px); visibility: hidden; }
}